eChapters

Plant diseases are classified on the basis of type of pathogenic or nonpathogenic causes of the disease. The classification is based on the plant pathogenic organisms as follows.
1. Parasites
They include both biotic and mesobiotic agents. The diseases are incited by parasites under a set of suitable environment. Association of definite pathogen is essential with each disease.
i. Biotic agents: They are also called as animate causes. They are living organisms.Biotic agents include
1. Prokaryotes
a. True bacteria or bacteria (Facultative parasites) e.g. Citrus canker.
b. Rickettsia-like bacteria (RLB) e.g. Citrus greening, Pierce’s disease of grape.
c. Mollicutes or wall-less prokaryotes
i. Mycoplasma-like organism (MLO) e.g. Sesame phyllody, Egg plant little leaf.
ii. Spiroplasma e.g. Corn stunt, Citrus stubborn.

There are thousands of diseases, which attack crop plants. Classification can be made based on several criteria. The various ways of classifying diseases of plants are given below.
A. Based on type of infection
1. Localized disease: Affecting only a part of the plant; leaf spots and anthracnoses caused by different fungi.
2. Systemic disease: affecting the entire plant.
B. Based on symptoms: Rusts smuts, wilts, blights, cankers, mildews, rots, damping-off, die-back, scab etc.
C. Based on the host plant
1. On the basis of host e.g. Diseases of apple, diseases of wheat, diseases of rose, diseases of coconut, diseases of coffee, diseases of cotton.
2. On the basis of host group- e.g. cereal crop disease, pulse crop diseases, oilseed crop diseases, root crop disease, forage crop disease, plantation crop disease etc.

Parasitism
The term parasitism refers to a parasite’s taking of food from its host. Without chlorophyll, fungi are unable to synthesis their own sources of food. Fungi are classified into three main biological groups according on the basis of mode of the nutrient uptake . Parasites, Saprophytes and Symbionts, The term saprophytes, or saprobes, refers to those fungi that feed on dead and decaying organic matter (Gr. sapros rotten + bios life). Some of them have evolved farther, but they are still unable to grow on other living things and can only exist as saprobes. We refer to them as obligate saprophytes(L. Obligare = to bind sapros) . On the other hand, some species live as saprophytes, but under certain circumstances, they can infect another living entity. We refer to them as facultative parasites (Greek parasitos + Latin facultas ability). Many fungus infect living hosts and deprive them of their food. They are called parasites (Greek: parasitos, which means to eat beside). Additionally, a few of them developed into facultative soprophytes (L. facultatas ability + Gr. sapros) after diverging as obligatory parasites (L. Obligar? to bind + Gr. parasitos table mate). Obligate parasites can only grow in culture on living media; in the wild, they can only feed on living protoplasm. On the other hand, facultative saprophytes are basically parasitic organisms but also capable of growing on dead organic matter under some conditions.

Most often, a plant gets diseased when it is harmed by an abiotic agents or attacked by a pathogen. As a result, in the first scenario, interaction and contact between the pathogen and the plant are required for the occurrence of a plant disease. No disease develops even though a pathogen and a plant come into contact if the weather is too extreme at the time of the pathogen’s contact with the plant and for a while afterwards. This could be because the plant is able to fend off the pathogen’s attack or because the pathogen is unable to attack at all. Therefore, it would appear that in order for disease to manifest, a third component—a set of environmental factors falling within a favorable range—must also exist. The degree of disease severity in both individual plants and plant populations is impacted by changes in any one of the three components, which can each show significant fluctuation. Plants can exhibit genetic uniformity over a wide area, be of a species or variety that may be more or less resistant to the pathogen, or they may be too young or too old for the pathogen to prefer. All of these factors can either accelerate or slow down the rate at which a particular pathogen causes disease. The way the three elements of disease interact has frequently been represented as a triangle (Fig. 2-1), which is commonly known as the “disease triangle.”

Definition
Fungi are eukaryotic, spore bearing, achlorophyllus, heterotrophic and thallophytic plants with varied forms and habitats, representing heterothallic or homothallic types of sexuality with characteristic sexual and /or asexual means of reproduction without tissue differentiation.
General Characteristics of Fungi
1. Thallus
The body of the fungus is called as Thallus, which is without stem, root and leaves. It may be Plasmodial, Pseudoplasmodial , Pseudomycelial or Mycelial. A single thread like filament is called as hypha. A hypha is made up of a thin, transparent tabular wall filled or lined with a layer of protoplasm.

A group of hypha constituting the body of fungus is called as mycelium may be septate or aseptate. i.e coenocytic.
(a) Coenocytic or Nonseptate or Aseptate Mycelium: When mycelium is not divided by cross walls called as Coenocytic mycelium. Depending upon the nature of parasitism with the host plant, mycelium is either ecotophytic or endophytic.
b) Septate Mycelium: When mycelium is divided by cross walls or septa called as septate mycelium.

Definition
Bacteria belong to proakaryota which encompasses organisms with a primitive type of nucleus lacking a clearly defined membrane .The bacteria are smaller than fungi and measure about 0.5 to 1.0 x 2.0 to 5.0μ.
Structure of bacteria
1. A bacterial cell consists of a cell wall and a compound membrane enclosing protoplasm.
2. The protoplasm contains the nucleus, vacuoles, mesosomes, lipids, polysaccharides, mitochondric granules, and spores.
3. Bacterial cells may have flagella, pili, fimbrae, and capsules on the outside.
4. The bacterial cell contains a characteristics cell wall. The cell wall of bacteria is composed of a peptidoglycan. It is composed of acetyleglucosamine and cetyle-muramic acid .
5. The rigid peptidoglycan layer is located.
6. The latter layer is composed of lipoprotein . It is common in gram negative bacteria.
7. Many bacteria possess other intracellular membrane systems such as mesosomes and chondrioids.
8. The mesosome structure is formed by an invagination of the cytoplasmic membrane.
9. Mesosomes serve for compartmentalization and integration of biochemical systems.

Definition of Virus
Viruses are very small (submicroscopic) infectious particles (virions) composed of a protein coat and a nucleic acid core. They carry genetic information encoded in their nucleic acid, which typically specifies two or more proteins. Translation of the genome (to produce proteins) or transcription and replication (to produce more nucleic acid) takes place within the host cell and uses some of the host’s biochemical “machinery”. Viruses do not capture or store free energy and are not functionally active outside their host. They are therefore parasites (and usually pathogens) but are not usually regarded as genuine microorganisms.
Mathwas (1981) considers a virus as a set of one or more template molecules normally encased in a protective coat or coats of protein or lipoprotein, which is able to organize its own replication only within suitable host cells where its production is:
i) Dependent on hosts protein synthesizing machinery (ribosomes).
ii) Organised from pools of required material rather than binary fission and
iii) Located at sites which are not separated from the host cell contents by a lipoprotein bilayer membrane.

Introduction
The goal of plant disease management is to reduce the economic and aesthetic damage caused by plant diseases. Conventionally, this has been called plant disease control, but current social and environmental values believe “control” as being absolute and the term too rigid. More multifaceted approaches to disease management, and integrated disease management, have resulted from
this shift in attitude, however. Single often severe measures such as pesticide applications, soil fumigation or burning are no longer in common use. Further, disease management measures are often determined by disease forecasting or disease modeling rather than on either a calendar or prescription basis. Disease management might be viewed as proactive whereas disease control is reactive,
although it is often difficult to distinguish between the two concepts, especially in the application of specific measures.
Plant disease management practices rely on anticipating occurrence of disease and attacking vulnerable points in the disease cycle (i.e., weak links in the infection chain). Therefore, correct diagnosis of a disease is necessary to identify the pathogen, which is the real target of any disease management program. A thorough understanding of the disease cycle, including climatic and other environmental factors that influence the cycle, and cultural requirements of the host plant, are essential to effective management of any disease.

Principles
The principles involved in thermotherapy is that the pathogens present in seed material are inactivated or eliminated at temperatures nonlethal for the host tissues.The exact mechanism by which heat inactivates the pathogen is not fully understood. However, it is universally accepted that heat causes inactivation and not immobilization of the pathogen by heat. Th rate at which the pathogen is inactivated is determined by temperature, the higher the temperature, the faster is the inactivation. At constant temperature, the drop in the density of pathogenic inoculum.
Methods
Following physical methods are employed for reduction or elimination of primary inoculums that may be present in seed, soil, or planting material.
i. Hot water treatment (HWT)
Hot water treatment is widely used for the control of seed borne pathogens, especially bacteria and viruses. A list of various important diseases claimed to have been controlled by hot water treatment is given in Table-1.

Introduction.
The Cultural practices which includes manipulation /or adjustment of crop production techniques have been as old as possibly agriculture itself. In early stages of agriculture development, the growers through their experiences and observations had known that repeated cultivation of a particular crop species or variety on a piece of land often resulted in crop diseases. By proper crop rotations they had been avoiding such diseases. As a matter of fact, in the present day agriculture, cultural practices are being considered as essential backup methods for plant disease management. Cultural practices often offer the opportunity to alter the environment, the condition of the host, and/or the behavior of the causal agent, to achieve economic management of disease. Most cultural practices used to control plant disease are preventive in nature. Integration of cultural practices, host resistance and pesticides or biocontrol agents may be necessary to provide options for controlling economically important plant diseases.

Managing plant diseases is necessary to preserve the quantity and quality of food, feed, and fiber that producers worldwide produce. To avoid, lessen, or manage plant diseases, several strategies may be employed. Aside from using effective horticultural and agronomic techniques, growers frequently largely depend on chemical pesticides and fertilizers. The remarkable increases in crop productivity and quality over the past 100 years have been largely attributed to such agricultural inputs. However, fear-mongering by certain opponents of pesticides and environmental degradation from excessive and improper use of agrochemicals have prompted significant shifts in public perceptions toward pesticide usage in agriculture. Political pressure is present to remove the most dangerous chemicals from the market, and there are stringent limits on the use of chemical pesticides today. Furthermore, because of the potential scale at which such applications could need to be made, the proliferation of plant diseases in natural ecosystems may make the successful application of pesticides impossible. As a result, several researchers studying pest management have concentrated on creating substitutes for artificial chemicals in the management of diseases and pests. Biological controls are one type of alternative among them.

Definition of Host Plant Resistance (HPR)
Those characters that enable a plant to avoid, tolerate or recover from attacks of pathogens under conditions that would cause greater injury to other plants of the same species.
or
Those heritable characteristics possessed by the plant which influence the ultimate degree of loss done by the disease.
or
The inherent ability of an organism (i.e., the crop plant) to resist or withstand the pathogen is called resistance
Classification of Resistance
Each plant species is affected by hundreds of kinds of pathogen. Frequently a single plant is attacked by hundreds of individuals of a pathogen. Yet, those plants survive which are resistant, adapting a number of mechanisms classified variously.
1. Based on existence
a. Preformed
When the resistance is already present in the plant even I the absence of the pathogen, it is known as preformed, axenic or passive

Plant Quarantine
The term ‘Quarantine’ is derived from the Latin word quarantum, meaning 40. It refers to the 40 days period of detention of ships from countries with bubonic plague and cholera in the Middle Ages. The first such quarantine was imposed in Venice in 1374.Present quarantine laws now include plants. Plant quarantine , restrict entry of plants, plant products, soil, cultures of living organisms, packing materials, and commodities, as well as their containers and means of conveyance to protect agriculture and the environment from avoidable damage by hazardous organisms.They exclude dangerous organisms while permitting plants and plant products to enter. The term exclusion convey this objective more clearly than plant quarantine. Exclusion relates to keeping organisms out; plant quarantine relates to keeping plants out.
In strict sense ‘Plant Quarantine’ refers to the holding of plants in isolation until they are believed to be healthy. Now, broader meaning of the plant quarantine covers all aspects of the regulation of the movement of living plants, living plant parts/plant products between politically defined territories or ecologically distinct parts of them. Intermediate quarantine and post entry quarantine are used respectively to denote the detention of plants in isolationfor inspection during or after arrival at their final destination.

Anti-pathogen Chemicals
The chemical substances that help to retard the activity of pathogens like fungus, bacteria and nematodes are said to be anti-pathogen chemicals.
Aim of use of chemicals in plant disease control
The aim and of use of chemicals in plant disease control are
• To create a toxic barrier between the host surface or tissue and the pathogen .
• To eradicate the pathogen present at a particular site on the host, such as seed, foliage, roots etc.
Functions of chemicals in plant disease control
• Reduction in inoculum density or eradication of inoculum from source of growth, multiplication and survival.
• Inactivaion or destruction of the pathogen when it lands on the treated surface, and
• Cure of the diseased plant.

The overuse of chemical pesticides and farmers’ improper application of them have resulted in a number of issues, including residue in food, feed, and fodder; resistance developing; resurgence, secondary outbreaks; and, most importantly, pollution of the environment. This has caused a condition known as Pesticide Treadmill, which is characterized by the need to apply ever-increasing amounts of chemical pesticides. Integrated Pest/Management was developed as an environmentally sound substitute for the exclusive use of chemicals after Rachel Carson’s book “Silent Spring” in 1962 sparked widespread concern about the overuse of pesticides.
The IDM Concept
In disease management, every alternative control strategy—cultural, biological, mechanical, resistant varieties, physical, etc.—is applied in combination to keep the disease below the threshold of economic injury . In order to control the disease, pesticides are employed if it spreads and hits the economic threshold. With consideration for the agro-ecosystem, this approach to integrated disease management uses the minimum amount of pesticides possible. In reality, we don’t aim for complete control while managing diseases—rather, we let them progress below what is tolerable, such as the economic threshold. Additionally, it offers agents the chance to endure by controlling the diseases and maintaining a particular state of equilibrium. Therefore, the goal of the integrated disease management concept is to manage the disease using all available strategies while achieving positive effects on the environment, society, and economy.

1. Enzymes are made up of
a) Carbohydrates          b) Proteins
c) Fats                           d) Lipids
2. Immediate precursor of chlorophyll a and chorophyll b is
a) Protochlorophyllide  b) Haemoglobin
c) Biluribin                    d) Xanthophylls
3. Water soluble flavonoid pigments are
a) Lycopene                 b) Lutein
c) Anthocyanins           d) Carotene
4. Which enzyme is used for the production of maltose syrup
a) Destrin                     b) Fungal alpha-amylase
c) Ligase                      d) Dextrose

1. Ascorbic acid is the chemical name of
a) Vitamin K               b) Vitamin C
c) Vitamin B               d) Vitamin A
2. In alkalimetric titrations, the titrant is
a) Iodine                    b) NaOH
c) EDTA                     d) Magnesium
3. EDTA is a
a) Tetradentate Ligand          b) Octadentate Ligand
c) Pentadentate Ligand         d) Hexadentate Ligand
4. The indicator used in the EDTA method is
a) Erichrome black T             b) Benzene
c) Phenopthalene                  d) Ethylene diamine

1. …………….. regulates that flow of substances in and out of the cell
a) Cytoplasm                b) Cellwall
c) Ribosome                 d) Cell membrane
2. Bacterial cell lack in which organelle?
a) True nucleus            b) Mitochondria
c) Chloroplasts             d) All
3. Bacterial cell wall is made of
a) Lipid                         b) Protein
c) Phospholipids          d) Peptidoglycan
4. Fungi cell wall is made of
a) Chitin                       b) Protein
c) Phospholipids          d) Peptidoglycan

1. The process preservation of fruits and vegetable with common salt and vinegar is
called
a) Fermentation               b) Pickling
c) Steeping                      d) Asepsis
2. The by product of apple is
a) Rags                           b) Peel
c) Pomace                      d) Stones
3. Fruit for making jelly should be rich in
a) Pectin and acids         b) Acids and protein
c) Protein and sugars     d) Sugars and acids
4. Sweetest sugar in fruit is
a) Sucrose                      b) Fructose
c) Glucose                      d) Galactose

1. Defects in fresh egg include
a) Bloom                  b) Meat spots
c) Cracks                 d) All of them
2. Green rots in eggs is caused by
a) P. fluorescens                  b) P. graveolens
c) Achromobacterperolens  d) Paracolobactrum
3. Proteus causes spoilage of eggs by producing
a) Red rots               b) Colorless rot
c) Black rots             d) Pink rot
4. Hay odor in fishes is caused by
a) Sporotrichum       b) Enterobacter cloacea
c) P. fluorescens      d) Cladosporium

1. The syndrome resulting from the ingestion of toxin in a mold contaminated food is
a) Aspergillosis              b) Enterotoxicosis
c) Mycotoxicosis            d) Neurotoxicosis
2. Patulin is toxic to
a) Mice                           b) Fishes
c) Cattle                         d) Human beings
3. Alimentary toxic aleukia isolated from grain is produced by
a) Alternaria                   b) Cladosporium
c) Fusarium                   d) All of the above
4. Mold nephrosis, a disease in pigs has been associated with
a) Aflatoxin                    b) Patulin
c) Citrinin                      d) Ochratoxin

1. Maize is deficient in
a) Methionine        b) Lysine
c) Tryptophan        d) None
2. Winterization is accomplished to remove.
a) Waxes             b) Cloudiness of Oils
c) SFA                  d) All the above
3. What do you mean from ‘Dhal’ ?
a) Whole dehisced pulse             b) Whole cleaned pulse
c) Dehusked and splitted pulse   d) All the above
4. The separation of the bran from the endosperm of which cereal grain in more difficult.
a) Rye             b) Wheat
c) Triticale       d) None of above

1. The food qualities such as taste, odour, colour etc. are measured in term of
a) Quick index            b) Organoleptic scale
c) Score card              d) Hedonic scale
2. In UV spectroscopy samples are typically placed in a.
a) Transparent cell     b) Cuvette
c) Silicon glass           d) Both a and b
3. A definite area or a space where some thermodynamic process takes place is known
as.
a) Thermodynamic law            b) Thermodynamic process
c) Thermodynamic system      d) Thermodynamic cycle
4. LMTD in case of parallel flow compared to counter flow would be.
a) More                       b) Less
c) Same                      d) Negative

1. Which the increase in temperature, the tensile strength and elastic modulus of material
a) Increase                     b) Decrease
c) Remains constant      d) None
2. Screens are used for mechanical reparation of
a) Solid liquid mixture     b) Solid gas mixture
c) Solid solid mixture      d) Liquid liquid mixture
3. Primary treatment of waste water in a plant will cause a drop of about ……… in the BOD.
a) 60%                           b) 50%
c) 30%                           d) 40%
4. Kicks assumed that the energy required to reduce the material in size was _____________ proportional to the size reduction ratio.
a) Directly                     b) Inversely
c) Equally                      d) None

1. Which acid is found in carbonated non alcoholic beverages?
a) Propionic acid         b) Acetic acid
c) Citric acid                d) Phosphoric acid
2. Ripening of cheese in presence of fungus penicillium roqueforti results change in
a) Texture                    b) Flavor
c) Colour                     d) Both a and b
3. Microorganism responsible for discoloration in fish during spoilage.
a) Alcaligenes             b) Flavobacterium
c) Pseudomonas        d) Rhodotorula
4. Common microbial contaminant is poultry (freshly dressed, eviscerated) food product in
a) Coliforms                b) Pediococcus sp.
c) Bacillus subtilis       d) Pseudomonas

1. Texture property of paneer can be best represented by
a) Hardness                    b) Gumminess
c) Springiness                 d) Chewiness
2. Electromagnetic radiation wave length for UV, VIS, NIR radiation should be
a) 300-400 nm, 400-765 nm, 765-3200 nm
b) 765-3200 nm, 400-765 nm, 300-400 nm
c) 400-765 nm, 300-400 nm, 765-3200 nm
d) 300-400 nm, 765-3200 nm, 400-765 nm
3. Voigt model (Kelvin model) consists of
a) Spring and dashpot in series      b) Spring absent
c) Dashpot absent                           d) Spring and dashpot in parallel
 

1. Speed of bucket elevator ranges from
a) 2.5 to 2.8 m/s                    b) 2.5 to 4.0 m/s
c) 3.5 to 6.0 m/s                    d) 5.0 to 10.0 m/s
2. The fundamental principle of pressure nozzle is the conversion of pressure energy into
a) Mechanical energy          b) Rotational energy
c) Kinetic energy                 d) Static energy
3. Which conveyer is used for transporting the large quantifier of materials over a very large distance at a low cost
a) Belt conveyer                  b) Chain conveyer
c) Pneumatic conveyer       d) Screw conveyer
4. …………………..conveyer is used to convey sticky materials.
a) Belt conveyer                  b) Chain conveyer
c) Pneumatic conveyer       d) Screw conveyer

1. Euricic acid containing group mainly contains which oil
a) Cocoa butter                         b) Groundnut oil
c) Rapeseed /mustard oil         d) Sesame oil
2. Other name of lecithin is
a) Phosphatidyl choline            b) Phosphatidic acid
c) Phosphatidyl ethyl amine     d) Phosphatidyl alcohol
3. Denaturation of proteins means
a) Loss of primary structure
b) Loss of three dimensional structures
c) De-polymerization
d) Copulation

1. In tea, fermentation, the micro organisms involved in
a) Fusarium                b) Aspergillus
c) Alcaligens               d) None
2. The content of CO2 in beer is about
a) 0.02 – 0.06 %         b) 1.78 – 2.01 %
c) 0.45 – 0.52 %         d) 0.60 – 0.92 %
3. Meat is irradiated to present the outbreak of
a) Shigella                  b) Salmonellosis
c) T.B.                        d) Fever
4. Egg quality is manually checked by seeing it through a temperature it is called
a) Lightening             b) Lamping
c) Sorting                  d) Candling

1. Pressurized packed foods are called
a) Baro foods      b) Aerosols
c) Aceituno         d) Barges
2. Fo value is F value when Z is equal to
a) 10                    b) 12
c) 16                    d) 18
3. Dole process is the example of
a) Heat- cool- fill               b) Bold sterilization
c) Batch pasteurization    d) Fast canning
4. Mustard oil is effective against
a) Saccharomyes cerevisae            b) Penicillium notatum
c) Clostridium botulinum                  d) All the above

1. All microorganisms need
a) Nutrients                     b) Water
c) Specific temperature  d) All of above
2. Antioxidant in foods
a) Enhance shelf life             b) Prevent oxidation reaction
c) Decrease deterioration     d) All the above
3. Thermophilic bacteria grow at
a) Low temperature               b) High temperature
c) Medium temperature         d) All of the above
4. Preservation method which involves removal of water
a) Drying                           b) Canning
c) Sterilization                   d) Pasteurization

Abattoirs: It is the types of slaughterhouses where animals are slaughtered for meat and offal. Abattoirs usually include lairage (a holding area for live animals), a slaughtering line and cold stores. It has facilities for processing of by-products (blood, intestines, skins, fat, bristle, unusable waste products), and treatment of waste water and air are often included.
Absorbents: Materials or substances that is capable of absorption. Uses of absorbents include incorporation within food packaging (to absorb oxygen as a preservation technique, to control humidity, and to manage aroma and flavour problems in packaged foods) and for purification of foods and beverages, such as drinking water and liquid foods. Silica gel, Alumina, activated carbon or charcoal, zeolites, adsorption chillers used with refrigerants and biomaterials that adsorb proteins.
Absorption: It is a process involving molecules of one substance being taken directly into another substance. Absorption may be either a physical or a chemical process, physical absorption involving such factors as solubility and vapour-pressure relationships and chemical absorption involving chemical reactions between the absorbed substance and the absorbing medium. Absorption includes such processes as the passage of nutrients and other substances from the gastrointestinal tract into the blood and lymph, and also the uptake of water, fats and other substances into foods. It may also gain of water by dry foods.

^{Baby corn: Small ears of immature corn, generally harvested between 2 days before and 3 days after silking. Baby (dwarf) corn is sold fresh or canned and generally measures around 4-9 cm in length and 1-1.5 cm in diameter. It is popular in Oriental cuisine.
Bacilli: Generally refers to any rod-shaped bacterial cells. It may be used specifically to refer to a member of the genus Bacillus.
Bacillus cereus: A bacterium which grows on rice, usually found in temperate countries in spore form. The spore will germinate after cooking and lead to growth of the vegetative form which can cause food poisoning. There are 2 strains, one has an incubation period of 1 – 5 hours, duration of 6 – 24 hours and the symptoms are nausea and vomiting and occasionally diarrhoea; the other has an incubation period of 8 – 16 hours, duration of 12 – 24 hours and the symptoms are abdominal pain, diarrhoea and occasionally nausea.
Bacillus licheniformis: Bacteria which can produce a toxin causing diarrhoea and vomiting. The incubation period is 4 – 8 hours.
Bacillus subtilis: Bacteria which can produce a toxin causing vomiting, abdominal pain  and diarrhoea. The incubation period is 2 – 18 hours.}

Cafeterias: Self service restaurants. Often located within larger establishments, such as department stores, schools or universities.
Caffeine: One of the xanthine alkaloids naturally present in several plant foods, including tea, coffee and cola nuts. Acts as a stimulant. Used as an ingredient in some soft drinks, including cola beverages and energy drinks.
Cake batters: Batters usually prepared from flour, eggs, butter or margarines, and sugar that are used to make cakes. Other ingredients are added ac- cording to the type of cakes to be made.
Cake flour: A very high-extraction low-protein white flour used for making very lighttextured cakes such as angel cake.
Cake mixes: Powdered formulations containing all the ingredients required to make cakes.
Cake mixtures: The five important cake mixtures are basic, Victoria sponge, Genoese, pound and fatless. The first two use a chemical raising agent; the last three rely on air beaten into the egg for raising.
Cake: Soft bakery products produced by baking a batter containing flour, sugar, baking powders and beaten eggs, with or without shortenings. It may also incorporate root vegetables, principally carrot. According to the final product, other ingredients are also included, such as flavourings, nuts, chocolate and dried fruits.

Dahi: Fermented milk product popular in India. Dahi made from buffalo milk is generally preferred to that made from cow milk. A sweet variety of dahi, misti dahi, is prepared by adding cane sugar to milk during heating, giving a caramelized flavour and brown colour.
Daidzein: One of the two isoflavones of particular importance in soybeans, the other being genistein. Both compounds are structurally similar to oestrogenic steroids and possess both oestrogenic and antioestrogenic activities, the principal functions responsible for the health benefits associated with consumption of soybeans and soy products. Dairies/Dairy Factories: Premises in which dairy products are manufactured. It is called creameries or dairy factories.
Dairy beverages: Drinks based on milk or other dairy products, e.g. whey.
Dairy desserts: Ready to eat desserts based on dairy products, such as cream, milk or yoghurt. It is available as chilled, frozen and shelf-stable products. It includes mousses, custards, milk puddings and ice cream products.
Dairy products: Products manufactured from milk. It includes as major product groups, cheese, yoghurt, butter, cream, fermented milk, ice cream and whey products. It is also called milk products.

Eating quality: The extent to which a food is assessed as being edible, i.e. possessing acceptable sensory properties.
Eclairs: Finger-shaped bakery products made with choux pastry which is baked and filled with whipped cream or custards and topped with fondant icing, usually flavoured with chocolate or coffee. Also a name given to confectionery products comprising toffees filled with chocolate.
Ecology: Biological science, involving the study of interactions of organisms with their environment, including interrelationships between organisms. e-commerce: Buying and selling of products and services transacted electronically via the Internet. It includes dealings among businesses and between companies and consumers. It is also called electronic commerce.
Edestin: One of the vegetable proteins present in certain plant seeds, including barley and hemp seeds.
Edible containers: Holders for foods which are intended to be consumed along with the food they contain. It is mainly made from dough. Examples include ice cream cones and taco shells.
Edible oils: Lipid-rich substances which are liquid at room temperature and are used in preparing foods. Usually have a high content of triacylglycerols and those of plant origin can be a source of bioactive phytochemicals. Should be of high quality, pale in colour, free from off odour and off flavour, and of high nutritional values. It includes vegetable oils and marine oils.

F2 toxin: Mycotoxin produced by Fusarium graminearum, F. culmorum and other Fusarium species. It may be formed when the fungus grows on damp cereal grain (e.g. wheat, barley and corn) used as animal feeds. It has oestrogenic activity and can cause hyperoestrogenism in swine, cattle and poultry. Also known as zearalenone and zearalenol.
Falling number: Indicator used to measure the activity of α-amylases in cereal flours. In wheat, a low falling number may signal reduced grain quality and poor breadmaking properties.
Farina: A fine flour or meal which is prepared from cereals, particularly wheat, or other plant foods with a high starch content. It can be used in the manufacture of foods such as pasta.
Farinographs: Instruments used to investigate the physical properties of dough.
Fast foods: Prepared foods obtained from restaurants and other catering establishments, where the aim is to provide a fast service and rapid customer turnover at reasonable prices. Examples of fast foods include burgers, pizzas, sandwiches and French fries.
Fast-freezing: The food is freeze very rapidly so as to prevent the formation of large ice crystals within the cell which would disrupt them and cause the contents to leak out on thawing, thus destroying the structure of the food.
Fat extenders: Food additives that allow the fat content of food to be reduced without affecting the texture.

Galactose: Monosaccharide with six carbon atoms which occurs naturally as a component of many complex plant-derived polysaccharides, such as pectins and gums. It constituent of lactose from which it may be produced by hydrolysis. It has approximately 40% the sweetness of sucrose and is used in sweeteners. It is this monosaccharide liberated in the body which is responsible for lactose intolerance. One of the common monosaccharides which in combination with glucose form lactose, the sugar in milk.
Galactosides: Glycosides formed from mixing galactose with an alcohol; on hydrolysis, galactose is produced.
Galgals: Type of lemons produced by Citrus pseu- dolimon, which are indigenous to and cultivated on a commercial scale in India. Used in manufacture of pickles and as a source of fruit juices, peel, pectins and essential oils.
Gallates: Esters of gallic acid used as antioxidants in oils, fats and essential oils only. Those available are propyl gallate, E310, octyl gallate, E311 and dodecyl gallate, E312.
Gallic acid: Organic acid with antioxidative activity which occurs naturally as a component of tannins., e.g. in tea. Gallic acid esters, such as octyl gallate and propyl gallate, are used as antioxidants in the food industry.
Gamma irradiation: Exposure of foods to gamma rays, generated by radioactive decay of cobalt-60 (60Co) or caesium-137 (137Cs). It is used for sterilization or preservation purposes. Irradiation delays ripening of fruits and vegetables, inhibits sprouting in bulbs and tubers, causes disinfestation of grain, cereal products, fresh and dried fruits and vegetables, and destroys bacteria in fresh meat. Continued consumer concern over the safety of irradiation and irradiated foods has limited its full-scale use.

Haem: Iron-containing compounds in which the iron is complexed in a porphyrin ring. Component of pigments such as haemoglobin, myoglobin and cytochromes. The iron atoms can bind oxygen in a reversible fashion or conduct electrons. Alternative spelling heme.
Haemoglobin: Oxygen-carrying protein which is found in the blood of animals. Haem groups within the protein bind oxygen to form oxyhaemoglobin, which is carried to oxygen-depleted cells where the oxygen is released. Other inorganic compounds, including carbon dioxide, can also be bound by the haem groups. Alternative spelling hemoglobin.
Haemoproteins: General term for haem-containing proteins, including haemoglobin, myoglobin, cytochromes, catalases and peroxidases.
Halal foods: Foods permitted under Islamic dietary law, particularly meat from animals that have been slaughtered according to accepted Islamic procedures. For foods to be certificated as halal (lawful), they must be free from haram (unlawful, prohibited) substances, such as pork and swine by-products, carrion and intoxicants such as alcohol.
Half butter: Butter product with a low fat content of approximately 39-41%.
Half cream: Cream product with a fat content of approximately 12%.
 

Ice cream cones: Thin, slightly sweetened, wafers baked on a waffle iron and curled before cooling to form a cone shape. It is used to hold one or more scoops of ice cream.
Ice cream mixes: Commercial products used in manufacture of ice cream. Contain all the main components of the final product, including milk, cream, sugar, flavourings and emulsifiers.
Ice cream wafers: Thin, slightly sweetened, waffle textured wafers that are usually triangular or rectangular and served as an accompaniment to ice cream or used to make an ice cream sandwich.
Ice cream: Frozen dairy product with creamy, smooth and crystalline consistency. In addition to milk and dairy products such as cream, milk powders, butter and sweetened condensed milk, also con- tains sugar, flavourings and additives such as emulsifiers and stabilizers. The ingredient mix is processed in an ice cream freezer where it is frozen by contact with the refrigerated wall, blades scraping the mixture from the walls while whipping air into the ice cream. The soft-serve ice cream produced can be hard- ened further by placing in a suitable freezing apparatus. Ice nucleation activity: Promotion of the formation of ice crystals. Agents displaying ice nucleation activity include small particles, such as food particles, and large molecules, such as ice nucleating proteins.
Ice: Frozon or solid form of water, used for numerous food processing applications, including chilling and glazing of foods (e.g. fish). It is used in place of water where intense agitation or prolonged processing might overheat a mixture. The energy necessary to melt ice would heat the same mass of water by 80°C. Small pieces of ice, e.g. ice cubes or crushed ice, may be added to beverages to cool them, while ice crystal characteristics play an important role in determining the quality of frozen foods. Flavoured ice is consumed in the form of ice lollies and water ices. It is also used for cooling.

Jaggery or Gur: Unrefined brown coloured sugar produced mainly in India by evaporation of sugar cane juices. Or a crude brown sugar made from the sap of coconut or palmyra palm trees, sold in round cakes or lumps.
Jam: A fruit preserve made by mixing fruit or boiling it with sugar and water and adding extra gelling agent if required, usually pectin. The high sugar concentration inhibits but does not totally prevent proliferation of microorganisms, so jam is usually bottled hot in sterile jars with a seal, or sterilized after bottling.
Jasmine: Natural flavourings with warm, spicy characteristics derived from flowers and leaves of jasmine (Jasminus spp.). Predominant flavour compounds and aroma compounds include jasmonates, jasmones, benzyl acetate, indol and eugenol.
Jellied milk: Milk to which is added sugar, flavourings, thickening agents and gelling agents. It is also known as jellified milk.
Jellies: Small, soft sweets, usually fruit flavoured, of gelatinous texture, made in various shapes and often coated with sugar. The singular term, jelly, is used to refer to jam-like products, usually clear, that are made from strained fruits containing pectins which are boiled with sugar. Also refers to soft, semi- transparent foods prepared from gelatin which are sweetened, flavoured, cooled in a mould and eaten as desserts.

Kachauri: A type of pitta bread made into a pocket and stuffed with a spiced bean mixture.
Kalakand: Sweetened dairy product that is popular in India. It is made by evaporating acidified buffalo milk.
Kanji: Traditional Indian beverage made from black carrots. Peculiar to the northern plains of India, black carrots are black on the outside but a rich red colour under the skin. The carrots are parboiled in water with salt and other flavourings such as ground mustard seeds and chilli powder. The mixture is then left to ferment in the sun, resulting in a sour and spiced red drink which is consumed as an accompaniment to meals.
Kava: Beverage made by aqueous extraction of powders prepared from rhizomes of kava kava (Piper methysticum). It is used in the south Pacific region as a narcotic/stimulant. It is also used in treatment of anxiety and a range of disorders. The pharmacologically active components are lactones. Non-addictive, but can have adverse effects, such as muscle weakness, drying of the skin, and liver damage, if consumed over a long period of time or in high amounts. Kawal: Strong-smelling pastes prepared by fermentation of leaves of the legume Cassia obtusifolia. It is rich in protein. It is used as meat substitutes in soups and stews.
KCl: It is chemical formula for potassium chloride. One of the chlorides widely used in food processing at varying levels to replace salt (NaCl), for example in brines, in order to reduce Na levels in foods, and specifically to produce low sodium foods and salt substitutes.

Labelling: Process of attaching labels to items to make them identifiable, or the information included on the labels. For foods, information may include barcodes, brand names, trademarks, illustrative matter, and compositional and nutritional details.
Labels: Pieces of paper, plastics or fabric which are attached to and provide information about an item. For foods, this information may include branding or the trademarks of a food company, the geographical origin, date marking, compositional details, health claims, nutritional values and warnings relating to specific ingredients, e.g. nuts. The content of informa- tion on food labels is often governed by legislation.
Lacquers: Liquids consisting of resins, cellulose esters, shellac or similar synthetic substances dissolved in a solvent, such as ethyl alcohol. Dry to form shiny, hard, protective or decorative coatings for plastics, wood, metals and other products.
Lactacins: Bacteriocins synthesized by Lactoba cillus spp. that are inhibitory only to other lactobacilli. Lactacin A is produced by L. delbrueckii subsp. lactis JCM 1106 and 1107. It has a narrow host range and is heat labile. Lactacin B is produced by L. acidophilus N2, and its synthesis is chromosomally linked. This protein forms aggregates of molecular weight 100,000 Da; however, the actual molecular weight of lactacin B is 6000-6500 Da. Lactacin F is produced by L. acidophilus 88, and its synthesis is plasmid linked. It has a broader activity range than lactacin B, and forms ag- gregates of molecular weight 180,000 Da; however, the actual molecular weight of lactacin F is 25,000 Da.

Macaroni: Thick hollow tubes of pasta which are usually short and curved.
Macaroons: Small chewy cakes or cookies made from ground almonds/almond paste or coconut, sugar and egg whites. It is ften baked on rice paper.
Maceration: Softening or breaking up of foods by soaking in a liquid, or the soaking of foods (usually fruits) in a liquid in order to absorb the flavour. Spirits or liqueurs are often used as the macerating liquid.
Machine vision: Inspection systems in which samples are examined using a camera, the image from which is analysed by computer using image processing algorithms. Operations which can be performed include defect detection, dimensions measurement, orientation detection, grading, sorting and counting.
Magnesium (Mg): One of the essential mineral nutrients which is widely distributed in plant and animal foods, good sources including fruits, vegetables and dairy products. Standard Western diets generally contain adequate levels of magnesium, so fortification is largely unnecessary. Absorption of dietary magnesium may be affected by other dietary nutrients such as calcium, phosphate and vitamin D, and also by some clinical conditions, including alcoholism and diabetes. Magnesium is an important bone constituent and intracellular inorganic cation acting as an essential cofactor in many enzymic reactions. Magnesium deficiency can cause calcification of soft tissues, electrolyte imbalances, gastrointestinal symptoms and personality changes. If taken in excess, magnesium toxicity symptoms can include nausea, vomiting, hypotension and neurological changes.

Nan (bread): A yeast-raised bread made from white flour and yoghurt, cooked very quickly as a large flat pear shaped bread on the side of a tandoori oven. The shaped dough is moistened so that it sticks to the side of the oven and is hooked off when cooked. It served with Indian meals. Or Flat bread originating from northwest India is made from white flour, leavened with sodium bicarbonate and baked in a tandoor.
Nanofiltration: Form of filtration that uses semi-permeable membranes of pore size 0.001- 0.1 μm to separate different fluids or ions, removing materials having molecular weights in the order of 300-1000 Da. Nanofiltration is most commonly used to separate solutions that have a mixture of desirable and undesirable components. An example of this is the concentration of corn syrups. Nanofiltration is capable of removing ions that contribute significantly to osmotic pressure, and this allows separation at pressures that are lower than those needed for reverse osmosis.  Naringenin: Non-bitter flavanone found mainly in citrus fruits, but also in other fruits, e.g. tomatoes.
Naringin: Bitter glycoside present in citrus fruits.
Natamycin: Polyene antibiotic with antifungal activity used topically on skin and mucous membranes for treatment of ringworm in cattle and horses. Absorption through dermal tissues of treated animals is normally negligible. Also used as a fungicide on bulbs such as onions and garlic. It is also known as pimaricin.
Natural flavourings: Flavour compounds, also essential oils, extracts and hydrolysates containing flavour compounds, that are derived from natural sources, such as plants, animal foods and edible yeasts. Usually they have little or no nutritive value but are used solely to impart flavour.
Natural foods: Foods produced by natural farming and using natural processing methods, e.g. without the use of added salt, sugar and preservatives. It is similar to organic foods but not necessarily totally organic.

Oat bran: Outer layer found under the hull of the oat grain which forms the milling fraction.
Oat fibre: Indigestible material derived from oat grains, consumption of which is reported to reduce serum cholesterol.
Oat flour: Flour ground from oats which their outer layers have been removed. It does not contain much gluten and must be combined with wheat flour to make a bread which rises. It is used as an ingredient in bakery products and snack foods.
Oat germ: The germ of the oat grain separated during the process of making oat flour. It is usually mixed with oat bran to a brown powder which can be used to make a thin porridge or added to other flours for use in bread making.
Oat oils: Oils extracted from oats which is highly unsaturated and containing high levels of linoleic acid.
Oatmeal: Coarsely ground or cracked dehusked oats separated by sieving into various particle sizes, usually fine, medium and coarse, but superfine and pinhead can be found
Oatrim: Fibre-rich fat substitute made from oat flour and oat bran which is used in bakery products, salad dressings, confectionery and dairy products.
Obesity: It is a condition in which the body’s weight is beyond the limit of skeletal and physical requirements due to excessive accumulation of fat. Possible causes include overeating, an inappropriate diet, genetic factors and metabolic disorders. Obesity is associated with an increased risk of developing a range of diseases, including adult onset diabetes, cardiovas cular diseases and certain types of cancer. In some cases, obesity can be reversed through measures such as adoption of a low-calorie diet, making changes to lifestyle or consuming functional foods designed for this purpose.

Packaging films: Packaging materials in the form of thin sheets which can be wrapped round a product. Films can be made from synthetic materials, such as plastics, or natural substances, such as whey proteins.
Packaging materials: Substances used to make packs. Packaging for foods is commonly made from a variety of materials, including glass, plastics, rubber, wood and paper, which are formed into a range of container types. The type of material chosen depends on the product to be packaged and the intended use.
Packaging: Enclosure or wrapping of products. Functions include product containment for handling, transportation and use, preservation, optimization of product presentation, hygiene and to facilitate product dispensing and use. The term covers retail (primary), grouped (secondary) and transport (tertiary) forms.
Packinghouses: Establishments in which products are packed.
Packs: Containers of varying shapes and sizes made from paper, plastics, cardboard or other materials that are used to enclose items such as food. The term is also used to describe items or groups of items which are packed in containers or enclosed in packaging materials.
Pakora: Indian snack foods consisting of pieces of spiced meat and/or vegetables enclosed in batters containing besan or chickpea flour and deep fried. Deep-fried and served hot with chutney. The fritters

Quality assurance: Planned and systematic actions necessary to provide adequate confidence that goods or services will satisfy given requirements. For the food industry, this is a customer-focused management system, whose aim is to guarantee food safety and con- sistent product quality by application of production, processing and handling standards. Proactive food safety programmes, in particular those based
on Hazard Analysis Critical Control Point (HACCP) principles, are the foundation of many food quality as- surance systems.
Quality control: A system of maintaining standards in manufactured products by testing a sample against the specification.
Quantitative descriptive analysis: Comprehensive system used in sensory analysis that covers sample collection, assessor screening, vocabulary development, testing and data analysis. Quantitative descriptive analysis (commonly abbreviated to QDA) uses small numbers of highly trained assessors. Once the training sessions have established satisfactory panel performance, and removal of ambiguities and misunderstandings, the test samples can be evaluated. This is carried out in replicated sessions using experimental designs that minimize biases. Three major steps are required: development of standardized vocabulary; quantification of selected sensory
characteristics; and analysis of results by parametric statistics.

Rabadi: Traditional fermented food of India, prepared by fermentation of a mixture of flour made usually from pearl millet, and buttermilk. Cereal flour may be partially substituted by that prepared from soybeans or other vegetables.
Rabri: Concentrated and sweetened buffalo milk product with a flaky/layered texture. It is popular in India. Traditionally, milk standardized to 6% fat is heated at approximately 90°C with repeated removal of clotted cream (malai), sugar is added to the concentrated milk and finally the clotted cream is added back to the con- centrated sweetened milk.
In a commercial method, shredded chhana or paneer is used in place of clot- ted cream. Rabri has a relatively short shelf life.
Racking: Process of drawing off wines or beer from the sediment in the barrel.
Radappertization: The production of food free from spoilage microorganisms using ionizing radiation
Radiation: Energy emitted in the form of electromag- netic waves or subatomic particles.
Radical scavenging activity: Ability to trap organic free radicals formed by the splitting of molecular bonds. This protects cellular membranes from oxidative destruction and ultimately prevents DNA damage caused by the action of the radicals which can lead to carcinogenesis. Substances with high radical scavenging activity include antioxidant vitamins, such as α-tocopherol.

Saccharification: Process by which oligosaccharides and polysaccharides are degraded to produce smaller sugar units. It involves acid, alkali or enzymic (e.g. cellulases, amylases) hydrolysis of glucosidic bonds. Term is used frequently to describe hydrolysis of wastes, e.g. sugar cane bagasse or other lignocellulosic materials to produce substrates for microbial fermentation.
Saccharimeters: Devices used for measuring degree of rotation produced during transmission of polarized light through a sugar solution. When a standardized saccharimeter is used, this property is a function of the concentration of a sugar solution. In the sugar industry the rotation value (Pol) is used as a measure of sucrose content due to the low concentrations of other sugars.
Saccharin: It is a heterocyclic organic sulfur compound (o-benzosulfimide) that has approximately 300-600 times the sweetness of sucrose and is used in artificial sweeteners. It is available as the free acid and as sodium or calcium salts. Like sugar, saccharin salts are white crystalline solids that are highly soluble in water, but unlike sugar they are non-nutritive and impart a bitter metallic aftertaste.
Saccharometer: It is a graduated devices i.e.hydrometer which is directly calibrated with the percentage of sugar in the sugar/water solution. It is also used for determination of the density of sugar solutions, based on the level at which the device floats. It is also known as hydrometers.