eBook Chapters

Standard solutions

Standard solutions are solutions of accurately known concentration

Different standard solutions are

The influence of water quality on the soil and plant growth is related to the chemical and physicalproperties of the soil, the salt tolerance of the crop, the climaticregime of the area and the method,frequencyand the amount of irrigation water applied. Irrigation water quality refers to its suitability and sustainability for use in agricultural crops. The problems thatresultfrom the use of a particular irrigation water, vary both in kind and degree, and are modified by soil, climate and crop as well as by the skill and knowledge of the water user. As a result there is no set limiton water quality, rather itssuitability for use is determined by the conditions of use which affects the accumulation of water constituents andwhichmayrestrictcrop yield.The soilproblems mostcommonlyencountered and used as a basisto evaluate water quality are those related to salinity, water infiltrationrate,toxicityanda group of other miscellaneous problems. Numerous guidelines are available for evaluation of water quality. Time to time some of theseguidelines has been updated with modification of some criteria like SAR to Adj. SAR and the Adj. R_Na and development of new concepts like water qualityIndex (WQI) whichhave increasedour predictability. Thenewguidelines are relied heavily on old ones.The modified guideline by Ayers and Westcot (1985) was foundto be themost reliabletopredict thewaterqualityforirrigation.

Irrigated agriculture is playing a major role in enhancing food and livelihood security of a country. Supply of fresh water which is an importantinput for the sustainable and economic development of agriculture are not enough to meet the requirement of all sectors of economy. Reduced water availability to agriculture from the present share of 85% of country’s water resources to about 70-75% by 2020AD wouldaffect the capacity of the country to meet the food production target, unless supplies are augmented from unconventional sources. For future agriculture there are no alternatives but to rely on non conventional sources for partial alleviation of the forecasted water scarcity. Amongthese sources extraction of marginal quality groundwater and the waste water generatedfromurban and industrial activities have thepotential to augment the water supplies. Many associatedsoil, plant and environmental problems come up when these sources of water are directly used for irrigation. For addressing theseproblems and to get more benefit from thesesourcesof water, the first step is to understand how an irrigation water source affects the soil plantsystem.Thereforeknowledge of irrigationwaterqualityiscriticaltodevelop appropriate site and crop specific comprehensive short term and long term management programs.

1.    Mass transfer co-efficient is expressed as

(a) m/s₂

(b) m/s

(c) kg/s

(d) kg/ms

2.    Heat is related to

(a) Flow rate

(b) Energy

(c) Temperature

(d) Momemtum

3.    The units of mass transfer coefficients are

(a) Moles transferred / (time x area x concentration)

(b) Moles transferred / (time x area x mole-fraction)

(c) Moles transferred / (time x area x pressure)

(d) All of the above

Landform, water and plants form the three basic elements of garden designing. Each of these basic element is described and discussed in detail.

I Landform

“Landform” refers to three-dimensional relief of earth’s surface. Thus, in simple words it is the lay of land, synonymous with, “topography”. Land is defined as the surface of the earth and all its natural resources. Landform is thus 3-D view of earth’s surface including all the visible feature of an area of land and landscape refers to the picture representing a view of natural inland scenery. Landform is the common module in exterior environments, a base, an axis, a thread, which ties all the physical elements, space together along the horizon or the water edge. Landforms can be classified as macro-landforms, micro-landforms and mini-landforms. Macro-landforms refers to valleys, mountains, rolling hills, prairies, desert, seashore and plains. Micro-landforms refers to mounds, slopes, level areas or elevation changes using steps and ramps. Mini-landforms refers to subtle, undulations or ripples of a sand dunes or the textural variation of stones and rocks.

Different techniques are used for explaining and representing the type of landform. These include (i) Contour lines, (ii) Models, (iii) Ratio method, (iv) Value and colour, (v) Spot elevation, (vi) Computer graphics, (vi) Hatches (disconnected lines are used) and (viii) Percentage method. These techniques are used for proper study of the landform, to identify loopholes and need to modification in order to establish proper drainage or to modify the site in order to accommodate of various elements or to create an aesthetically pleasing ground plan.

Sustainable agriculture’s benefit to farm and community economies is grounded in four well-established economic development principles and a fifth, concern for the community:

Lower input farming system (LIFS)

Lower input farming system means reduced production levels with larger area of land used in order to maintain the same revenue; or reduced dependency on external inputs with similar production structure but improved valorization of the product through transformation and or direct marketing, cutting the length of the production chain is a sustainability concept (produce and consume locally). LIFS are seeking optimization of on-farm resources, minimization of off-farm resources use. It also leads to mixed farming system, characterized by animal valorization of vegetal production on farm and organic manure restitution to farm soil from farm husbandry. Mixed character of farming system optimally combines annual and perennial crops and animal production on the same farm. Lower input farming also maintains ecological infrastructures (at least 5% in integrated farming)-which prove to be very beneficial for biodiversity – can provide shelter for organisms providing biological control and also be a source of raw material (wood) for producing on-farm energy.

Things required for cell culture

1. Lab – having negative pressure (HEPA filter)

2. Safety cabinet (Hood/laminar flow)

a) Biosafety level 1 (BSL-1) – Basic level of protection. Agents handled under this cabinet are NOT infectious.

b) BSL-2 – Appropriate for moderate risk agents. Most of the non infectious cell cultures are done under this facility.

12.1. BASIC AND CURRENT FACTS OF AGRICULTURE

Basic information related to agriculture and allied sciences in India

2.1 Introduction

In a fiber optic sensor the heart of the sensor is an optical fiber. An optical fiber in its simplest form is a cylindrical symmetric structure consisting of a central ‘core’ glass/plastic of uniform refractive index and of diameter 4-600 µm. It is surrounded by a ‘cladding’ glass/plastic of slightly lower refractive index. To provide the mechanical and environmental protection to the fiber, the cladding is covered with an external plastic coating (seeFig. 2.1). The light in the fiber propagates by bouncing back and forth from the core-cladding interface. The design of the fiber optic sensor depends critically on the choice of optical fiber. Telecommunication fibers are inexpensive but may not be the right choice for sensors. Some of the fiber optic sensors dictate the use of application-specific optical fibers. In this chapter we shall first describe ray analysis for the light propagation in the fiber. The modes propagation, numerical aperture of the fiber, fiber characteristics and different kinds of optical fibers used for sensing will be described later.

Gardens have been considered important, sacred from ancient time and the styles developed being inspired form its surroundings. Thus the influences of climate, general landform, religion, spiritual vision, culture, nation, prevailing political conditions, social factors, architectural styles, etc have influenced in developing specific garden style in a particular region. These styles developed slowly over hundreds of years and remained insulated and remained intact till the travelling approach between different countries got well established. Later as the mobility between different countries became widespread, these style forms became intermingled and refined even to new forms. This resulted into the development of Japanese garden style or the arts of ‘bonsai’ making which had its origin in China, or the creation of west coast American garden that originated from the Bauhaus and modern movement that stated life in Germany, the mughal garden style in India based on Persian style from Iran etc.

Basically, the different garden styles can be classified into formal, informal, intermediate and wild garden styles. Aristotle, the father of mathematics and Pythagorus, the father of geometry and disciple of Aristotle, strongly influenced the geometry, mathematics and calculative features of formal garden style. While informal garden style have evolved from the eastern vision of thoughts, originated with Laotsu and Confucious contemplation (preaching) that manifested gardens to express peaceful and compassionate atmosphere influencing meditation, silence and internal harmony.

2.1 Introduction

Microbes are the oldest form of the life on earth. These organisms date more than 3 billion years to a time when they were discovered with oceans. They are so tiny in size that million microbes can fit into the eye of a needle. Without microbes, we can’t live. Thus, understanding microbes is vital to understanding past and future. Microbes play many roles in the earth’s environment recycling dead plant and animal matter through the soil, removing CO2 from the atmosphere by photosynthesis in the oceans and nitrogen from the atmosphere to form nitrogenous fertilizers plants. Microbes play an important role in nutrient recycling, management, organic matter, decomposition and increasing the crop productivity and quality and protection against diseases (Panwar et al., 2009). Over the past century, many of the basic scientific principles of plant nutrition and soil fertility have been explained. In developed countries, inorganic chemical fertilizers have been widely accepted as a major source of improving and maintaining soil fertility.

To understand how radiographs are produced by using X-rays, an understanding of how photons of diagnostic range can interact with matter is necessary in five possible mechanism of interaction:
    ·    Coherent scattering.
    ·    Photoelectric absorption.
    ·    Compton scattering.
    ·    Pair production.
    ·    Photodisintegration.

1. General Instructions

Instructions to work in the laboratory are given below. Students are advised to read them carefully before they begin their work in the laboratory.

• Apparatus to be used should be neat and clean.
• Graduated pipette should be used for pipetting.
• The small amount of liquid remaining in the pipette should not be blown out while standardizing the pipettes; allowance is always made for this. However, a frosted ring near the top of recently manufactured pipettes indicates that the last drop is to be blown out.

Introduction

Entomopathogenic nematodes (EPNs) viz., Heterorhabditis, Neosteinernema and Steinernema have been recovered from many regions of the world and have been used commercially as biocontrol agents of insect pests. They are associated with mutualistic bacteria in the genus Xenorhabdus for Steinernematidae and Photorhabdus for Heterorhabditidae. The infective juvenile nematodes enter their host insect through natural openings (mouth, anus or spiracles), they release bacteria into the insect and cause rapid death of insect host (24-48 h). EPNs were used against many insect pests viz., rice leaf folder, Cnaphalocrocis medinalis (Srinivas and Prasad, 1991); tobacco cutworm, Spodoptera litura (Rajkumar et al., 2003); brinjal fruit borer, Leucinodes orbonalis (Hussaini et al., 2002) diamond back moth, Plutella xylostella (Singh and Shinde, 2002); Diaprepes abbreviates (Jenkins et al., 2007); Bemesia tabaci (QiuBaoli et al., 2008) and sugar beet beetle (Saleh et al. 2009).

Abstract

The Basic Local Alignment Search Tool, or BLAST, is an online tool provided by the National Center for Biotechnology Information (NCBI) that allows users to search for matches between their query sequences and the sequences stored in NCBI databases. BLAST can be used to search for nucleotide sequences against nucleotide sequences, protein sequences against protein sequences, and protein sequences against translated nucleotide sequences in the databases. BLAST is widely used to study sequence similarity, identify target sequences, analyze the functional aspects of molecular sequences, and investigate evolutionary relationships. This chapter details on the BLAST and its applications.

The basic philosophy of nutrient management should be to apply fertilizers at rates to ensure high fertilizer use efficiency so that the amount of unutilized fertilizers is reduced to environmentally acceptable levels. Leaching of nitrate into public drinking water supplies has become a national problem. There is no realistic alternative but to use increasing quantities of inorganic fertilizers for maintaining food supplies in order to feed the increasing population. Used properly, fertilizers can, in fact, lead to better environment because greater vegetative growth and higher crop yields leave large quantities of residues in the soil, thus reducing erosion; absorb more carbon dioxide, a major source of green house effect and lessen the need to bring marginal and forest land into cultivation. The declining or stagnating yield trend in India has been attributed to multiple nutrient deficiencies and imbalance of nutrients. Therefore, the most widely recognized alternative is integrated nutrient management (Trehan et al., 2008).

Soil test based fertilizers is the maintenance of soil fertility and plant nutrient supply to an optimum level for sustaining the desired productivity through optimization of the benefits from fertilizers, organic manures, green manures, bio-fertilizers, non-conventional sources and crop residues. Soil test based fertilizers  aims at maximization of the use efficiency and minimization of the avoidable losses of nutrients from all the sources such that triple objective of maximization of crop yields, sustenance of soil, water and air quality and improvement of socio-economic conditions of farming community is accomplished.

    1.    Absorbance (A) - Defined as –log (1-a) = log (1/t), where ‘a’ is the absorbance and‘t’ the transmittance of a medium through which a light beam passes.

    2.    Absorption coefficient (a) - The relative decrease in the intensity of a collimated beam of electromagnetic radiation, as a result of absorption by a medium, during traversal of an infinitesimal layer of the medium, divided by the length traversed.

    3.    Acceleration due to gravity (g) - The standard value (9.80665 m/s2) of the acceleration experienced by a body in the earth’s gravitational field.

    4.    Acid - Historically, a substance that yields an H+ ion when it dissociates in solution, resulting in a pH< 7. In the Brönsted definition, an acid is a substance that donates a proton in any type of reaction. The most general definition, due to G.N. Lewis, classifies any chemical species capable of accepting an electron pair as an acid.

    5.    Acid dissociation constant (Ka) - The equilibrium constant for the dissociation of an acid HA through the reaction HA + H2O1 A- + H3O+. The quantity pKa = -log Ka is often used to express the acid dissociation constant

    6.    Acyl groups - Groups formed by removing the hydroxy groups from oxoacids that have the general structure RC (=O) (OH) and replacement analogues of such acyl groups.

    7.    Adiabatic process - A thermodynamic process in which no heat enters or leaves the system.

A. Purchase

a)Do not purchase leaking containers, loose, unsealed or torn bags.

b)Do not purchase pesticides without proper/approved labels.

c)Purchase only just required quantity e.g. 100, 250, 500 or 1000 g/ml for single application in specified area.

Landscaping combines elements of art and science to create a functional, aesthetically pleasing extension of indoor living to the outdoors. One initial purpose of landscape design is to blend mans’ technology (house or building) into the natural surroundings. To work towards a desirable landscape design, the landscape horticulturist must have a working knowledge of art elements and design principles.

The “art” is always changing as the plants grow, environmental conditions change and people use the space. For this reason, landscape designers use a design process that systematically considers all aspects of the land, the environment, the growing plants, and needs of user to ensure a visually pleasing, functional, and ecologically healthy design. The design process begins by determining the needs and desires of the user and the conditions of the site. With this information, the designer then organizes the plants and hardscape materials, which are collectively referred to as the features. The features can be physically described by the visual qualities of line, form, color, texture and visual weight—the elements of design. The principles are the fundamental concepts of composition—proportion, order, repetition and unity—that serve as guidelines to arrange or organize the features to create an aesthetically pleasing or beautiful landscape. Knowledge of the elements and principles of design are essential to designing a landscape and working through the design process.

Homeopathy

Homeopathy is a different system of health care being practiced across the world. It is not only an alternate health approach but a distinct full-fledged complete rational system of medicine having holistic, individualistic, and dynamistic approach to life, health, disease, remedy and cure. This system of health care science is offering treatment option for acute and chronic ailments of humans and animals. Homoeopathy takes a holistic approach towards the sick individual through promotion of inner balance at mental, emotional, spiritual and physical levels.

Birth of Homeopathy

Homeopathy was founded by Dr Hahnemann who was more concerned to evolve a safe and effective therapeutic paradigm around the key concept of similia. Dr. Hahnemann codified a new medical system with seven principles/ concepts when vital force theory , miasmatic theory of causation of diseases (Bhalwar, 2009) were prevalent and the concept of drug proving on healthy human being was proposed by Albrecht von Haller (Hahnemann,1922) .He fortified his key concept of “similia” with drug proving, drug dynamisation and individualization, and four ancillary theories viz. chronic diseases (Miasm), vital force (vital principle), single medicine and minimum dose. He named his new system of therapy as “Homeopathy” and published the first edition of Organon of Medicine in 1810.

DNA Migration in Agarose and Polyacrylamide Gels

Recommended Gel Percentages for Separation of Linear DNA

Instrumental methods of chemical analysis are the quantitative methods of analysis that use, as principal measuring devices, instruments other than those employed in conventional gravimetric and volumetric determinations.

The main basis for this method of analysis is the physical property of any particular element or compound being analyzed. These properties include:

Introduction

We are blessed with solar energy in abundance at no cost. The solar radiation incident on the surface of the earth can be conveniently utilized for the benefit of human society. Solar energy can be used as thermal energy for water heating, cooking, drying, distillation, space heating, cooling and power generation or it can be converted to electricity through photovoltaic cells, commonly known as solar cells. One of the popular devices that harness the solar energy is solar hot water system (SHWS). Flat plate collectors are used for low temperature applications (below 100^oC) while concentrators are preferred for higher temperatures. The most efficient application of flat plate collector is for getting hot water. Hot water in winter is an essential requirement for domestic uses such as bathing, cleaning of utensils and washing of clothes. In rural areas hot water is also required for softening of animal feed. Generally it is obtained by using firewood and cow dung cake in rural areas or using kerosene, liquid petroleum gas, coal or electricity in urban areas. Therefore, the use of solar water heaters will conserve lot of commercial and non-commercial fuels which are being wasted in merely getting hot water. A solar water heating system (SWHS) is made of several important elements: one or more solar collectors, a pump, a heat exchanger, a storage tank (or multiple tanks) and a back-up storage tank. The Solar heating system can be classified as passive or active. For water heating purposes, the general practice is to use flat plate solar energy collectors (FPC). The evacuated tube collectors (ETC) and evacuated tube heat pipe collectors (ETHP) are more efficient, though, the initial cost is comparatively higher. There are three type of water heaters extensively studied by various workers viz. natural circulation, collector-cum-storage and forced circulation in all over the world.

1.1. IMPORTANCE OF FOOD MICROBIOLOGY

Food may be defined as substances that provide nutrients, which when eaten and absorbed by the body, maintain life and growth. Food is basically energy stored in plant and animal foods in chemical form. On consumption, the stored form gets converted to physiological energy. Food is the prime necessity of life. Man has exhibited much thought and foresight in cultivating a variety of grains, fruits, vegetables, nuts and oilseeds and in rearing birds and animals for use as food.

Of the three primary needs of an individual, food, clothing and shelter, ‘food’ occupies the most important place. The biodiversity of foods- cereals, millets, pulses, oilseeds, spices, fruits and vegetables is varied and high in India, where we have varied agro-climatic regions from Kashmir to Kanyakumari. All the fifteen major climates in the world exist in India. India is the second largest producer of food in the world. The impact of green revolution is remarkable in India with many fold increased food production in the last five decades. The full potential of Indian agriculture can not be realized unless India emerges as a major player in the World agriculture.

World population is set to go beyond nine billion by 2050 and demand for food is likely to increase further because of growing affluence and globalization. Food security is achieved when all people have physical and economic access to sufficient, safe and nutritious value added food. India is emerging as a food power in the international trade of foods. The food processing industry in India has been identified as one of thrust areas for the development of the country. It has emerged as a highly perspective sector with immense potential in food processing. The future of Indian food processing industries is bright, provided it improves its quality of products as per international standards.The quality of food processing refers to the adherence of physical, chemical, biological, nutritional and sensory parameters required to achieve the wholesomeness of a food product. Quality control has become an important aspect for food processing industry for both domestic and export markets.

Introduction

Solar refrigeration technology engages a system where solar power is used for cooling purposes. It offers a wide variety of cooling techniques powered by solar collector-based thermally driven cycles and photovoltaic (PV)-based electrical cooling systems. Cooling can be achieved through four basic methods: solar PV cooling, solar thermal cooling, solar thermo-electrical cooling and solar thermo-mechanical cooling. The first is a PV-based solar energy system, where solar energy is converted into electrical energy and used for refrigeration much like conventional methods. The second method utilizes a solar thermal refrigeration system, where a solar collector directly heats the refrigerant through collector tubes instead of using solar electric power. The third one produce cool by thermoelectric processes. The fourth method converts the thermal energy to mechanical energy, which is utilized to produce the refrigeration effect.

The performance of solar refrigeration systems is determined based on energy indicators of these systems. The COP (coefficient of performance) can be calculated as follows:

Introduction

The process of setting up a business is preceded by the decision to choose entrepreneurship as a career and identification of promising business ideas upon a careful examination of the entrepreneurial opportunities. Generation of ideas is not enough; the business ideas must stand the scrutiny from techno economic, financial and legal perspectives. That is, after the initial screening of the ideas that do not seem promising prima facie, you should conduct an in-depth examination of the chosen three-four before settling for the one where you would like to exert your time, money and energies. You should prepare a business plan that will serve as the road map for effective venturing, whether you may require institutional funding (in which case it is necessary to do so) or not. Setting up of new business enterprises is a very challenging task; you are likely to encounter many problems en route. It’s advisable to be aware of these problems.

Molecular diagnostic laboratory set-up has basic requirements of space, laboratory benches and equipments. In terms of laboratory space, minimum four chambers, one each for sample preparation and nucleic acid extraction, PCR reaction mixture preparation, thermal cycling and gel analysis are required. In addition there should be sufficient space for storage of consumables and laboratory wares. In addition, there are some laboratory equipments which are needed in a molecular diagnostic laboratory. In the following section the equipments of a molecular diagnostic laboratory are discussed. The pictures are taken from the instruments present in the laboratory of the author. The purpose of this chapter is to introduce the reader to a molecular diagnostic laboratory. None of the pictures below are meant for promotion of any particular brand or manufacturer.

3.1 UV-VIS spectrophotometer

A spectrophotometer is required for determining the quality and quantity of nucleic acids extracted from a sample. Photometric research applications such as DNA, RNA and protein analysis can be carried out in a UV-Vis Spectrophotometer. There are various units that feature a broad wavelength range (including UV area), path length correction and a fast reading speed. Various instruments also provide an interface that allows quick measurements directly from the instrument or comprehensive easy-to use software for demanding assays.

The processing operations are carried out based on the principle of physical differences found in a seed lot.

6.1 Soil

The term ‘soil ’is defined in various ways depending on the general professional field in which it is used. However to an agriculturist, soil is the substance existing on the earth surface, which grows and develops plant life. For an engineer, soil is the unaggregated deposits of mineral and organic particles covering major part on the earth crust. It includes widely different materials like boulders, sand, gravel, clays and silts. Soil is produced by the weathering of solid rocks. The formation of soil is due to geologic cycle continuously taking place on surface of the earth. The geologic cycle comprises weathering or denudation, transportation, deposition and upheaval, again followed by the above mentioned processes. Weathering may be natural or artificial. In natural weathering, physical processes like temperature changes, flow of water, ice, wind and rain play the role. In artificial weathering animals especially human beings interference causes soil erosion and formation.

Statistics is defined as a discipline that includes procedures and techniques used to collect, process, and analyze numerical data to make inferences about the data. The word statistic is used as a singular, denoting the numerical data. Statistics are the numerical quantities calculated from sample observations. Here, the word statistics hence is plural. Basically, statistics is defined as the statistical data (in the plural sense) and also as statistical methods (in the singular sense). A clearer and more precise definition is that ‘statistics is the study of methods and procedures for collecting, classifying, presenting, analyzing, and interpreting data to make scientific inferences from it’. Bio statistics is the science dealing with the application of statistical methods to the problems of biological sciences.

2.1 FUNCTIONS OF STATISTICS

a) To present the facts in a definite form: If the data or results are given in numbers, rather than in qualitative statements, they will be more useful. The statements like ‘there is a considerable amount of unemployment in a country or the human population in a state is increasing at a faster rate’ are not in definite forms. The statements should be in definite form like there is a 15 percent unemployment in 2023 or the population is increasing by 5 percent every decade.

Introduction
Statistics is a field of mathematics that pertains to data analysis. Statistical methods and equations can be applied to a data set in order to analyze and interpret results, explain variations in the data, or predict future data. A few examples of statistical information we can calculate are:
Average value (mean)

Statistics involves procedures for collection, classification, analysis, interpretation and presentation of numerical data (Gupta, 1997). Statistical investigations involves four stages ie. collection of data, compilation of data, analysis of data and drawing inferences. For any statistical analysis, first step is data collection which constitutes the foundation for statistical analysis. The required data may be obtained either through survey or an experiment. Survey is the process of collecting data from a population but have no control over the factors which may affect the population characteristics under study, whereas in experiment, data is collected while control is exercised over the factors which may affect the population characteristics under study. Experiments always and almost provide better information than the survey but surveys are necessary in natural populations. When data is not available, it is collected by any of the two methods i.e. census or survey method. In census method, data are collected for each and every unit of the population whereas in sample method a representative sample is drawn from the population on the basis of which all the conclusions are drawn about the population from that sample.

In this chapter, the essentials of basic statistics are explored, with a focus on obtaining all key measures of basic statistics with just a single click. Additionally, the process of creating informative data distribution graphs is also explained.

Basic Statistics

Basic statistics offer fundamental tools that help us to make sense of data. Below, you’ll find concise descriptions of key basic statistical measures.

i. Arithematic mean (average)

The average represents the central value of a dataset, calculated by summing all values and dividing by the number of data points.

ii. Median (middle value)

It is the middle value in a dataset when all values are arranged in ascending order. It’s less sensitive to outliers.

iii. Mode (most common value)

The mode is the value that appears most frequently in a dataset.

iv. Variance

Variance measures how much individual data points deviate from the mean. A higher variance indicates a greater spread.

v. Standard deviation

The standard deviation is the square root of the variance. It provides a measure of how spread out the data is.

vi. Range

It is the difference between the maximum and minimum values in a dataset.

Wool is a thick and wavy animal fiber makes fibrinous protective covering of sheep. There are 170 different types of proteins are found in wool but the major and foremost protein is keratin. It is insoluble in nature and forms most of the part of wool. True wool fiber is basically modified hair that is not shed like the hair of most farm animals and medulla is absent in true wool. Wool contains excessively scaly surface but hair surface is mostly smooth, less elastic. The matured keratinized fiber extruding above the skin is considered dead tissue. Wool fiber is basically originated from follicle situated in dermis or middle layer of skin. Wool fiber is elastic, hygroscopic, retains warmness, durable, non inflammable and transmits ultra-violet light.

For the accurate identification and diagnosis of plant disease and plant problems a foundational knowledge of terms and definitions is vital for developing concepts, doing research, discussing and communicating issues and providing clarity to your work. The following terms and definitions are basic to the study of plant pathology. They are, however, just a brief introduction to the vocabulary of the science. If you have limited or no background in the subject and you are just getting started, the concepts and terminology of plant problems can seem somewhat daunting. However, your vocabulary and skill will develop through exposure to diagnostics, experience and correct use of the appropriate terms.

Plant pathology is the study of plant diseases and the abnormal conditions that constitute plant disorders. Etiology is the determination and study of the cause of disease. A pathogen can be living or non-living, but usually refers to a live agent. A pathogen is an organism which causes a disease. Pathological is a condition of being diseased. Pathogenic is having the characteristics of a pathogen and pathogenicity is the capability of a pathogen to cause a disease.

A plant disease is an abnormality in the structure and/or function of the host plant cells and/or tissue as a result of a continuous irritation caused by a pathogenic agent or an environmental factor. A disease is not static; it is a series of changes in the plant. All plants, to some extent, are subject to disease. Plant disease is the result of an infectious, or biotic agent or a noninfectious, abiotic factor. Plant injury is an abrupt alteration of form or function caused by a discontinuous irritant. Plant injury includes insect, animal, physical, chemical or environmental agents.

A causal agent is a general term used to describe an animate or inanimate factor which incites and governs disease and injury. A causal organism is a pathogen of biotic origin. When a pathogenic agent is virulent it can cause disease and if the agent is avirulent it is a variant of a pathogen that does not cause severe disease.

Accuracy

The degree of closeness of the determined value to the nominal or known true value under prescribed conditions. This is sometimes termed trueness.

Analyte

A specific chemical moiety being measured, which can be intact drug, bio molecule or its derivative, metabolite, and/or degradation product in a biologic matrix.

Analytical run (or batch)

A complete set of analytical and study samples with appropriate number of standards and QCs for their validation. Several runs (or batches) may be completed in one day, or one run (or batch) may take several days to complete.

Biological matrix

A discrete material of biological origin that can be sampled and processed in a reproducible manner. Examples are blood, serum, plasma, urine, faces, saliva, sputum, and various discrete tissues.

Goods and services are created through process of production. After production they have to be transferred or moved from the original producers to the final consumers. This involves the creation of market and the undertaking of number of activities such as buying, assembling, transportation warehousing, risk bearing, financing, selling etc. This constitutes the subject matter of marketing. Hence there is the need for the study of market.

What is market?

Market is derived from the Latin word “Marcatus” meaning trade, merchandise, ware, traffic or place of business. In the ordinary language, market is a place where buyers and sellers meet personally and make their purchases or sales. But in the language of economics, market need not be a place but it may be an area or region meant for potential exchange between a group of buyers and sellers interested in negotiating the terms of purchase and sale of goods and services and such negotiations may be done face to face at a certain place or may be done through other means of communication such as mail, phone, cable, television or through business middle men. Whatever may be the means of communication there will be free exchange or perfect communication between buyers and sellers so that a fairly uniform price prevails for a particular commodity over the whole area at any given time.

The recent availability and use of ultrasonography in veterinary science has revolutionized the study of bovine reproduction. The information- gathering capabilities of this technology are much higher than those of conventional rectal palpation. Ultrasonic imaging has provided new insights into the complex biology of various reproductive processes such as folliculogenesis and early fetal development. With the pressure on agricultural land, due to ever increasing human population, the grazing grounds for animals are fast squeezing and as a result more and more animals are being stall-fed. This practice has adversely affected the availability of essential nutrients to the animals and their reproductive efficiency. The problem is graverin small states, where pressure on land is more to accommodate the expanding developmental and commercial activities of the national capital situated next door. The routine applications of ultrasonography include evaluation of animals for pregnancy, twinning, cyclic structures on ovaries, uterine and ovarian pathologies etc.

Gas Chromatography (GC) was discovered in 1954, a verysensitive technique, whichpavedwaytothisworldfor the resolution ofthe sampleleadingtodetection … identification of the minutest quantity of the desired sample.

Fattyacids were usuallyconverted into correspondingmethyl esters (FAME) to improve volatility and to reduce peak tailing for GC. Usually, FAME could be conveniently prepared by heating lipids with a large excess of either acid- or base-catalyzed reagents. Whereas, acid-catalyzed reagents form FAME from both free fatty acids (FFA) and O-acyl lipids base-catalyzed reagents caused only transesterification, i.e. conversion of O-acyl lipids to FAME and do not usually form FAME from FFAs. A base-catalyzed reaction was a useful alternative to acid-catalyzedreactions whena lipid sample contained acid-labile FAs such as propenoids, present in seed oils from the Malvales order, such as cottonseedoil. To effect solublizationof nonpolarlipids such as triacylglycerols in methanol. the predominant solvent in derivatization reagents, benzene was frequentlyadded to the derivatizalion reaction mixture. However, due to health concerns, use of benzene was discouraged. To help solubilize nonpolar lipids, methylene chloride and tetrahydrofuran had been used in place of benzene.

India is a vast country with varied soil and agro-climatic conditions and therefore is able to grow a wide range of vegetables. In view of their productivity, diversification, nutrition, value addition and export, vegetables are an important component in Indian agriculture. Up to 1939, vegetable seeds were used to be imported from Australia, U.K., U.S.A., but after World War I and II, India started seed production of vegetables. In the recent past, the seed industry has made rapid strides over the past three decades and has contributed significantly to the quantum jump in agricultural production and India emerged as the second largest producer of vegetables, next to China in the world. During 2005-2006, India produced 113.5 million t of vegetables from 7.2 million ha with a productivity of 15.76 t/ha. The seed industry has increased certified and quality seed production and distribution by the organized sector to about 60 lakh quintal from 300q in 1964-65. India can be proud of having launched and managed both crop improvement and seed improvement as simultaneous and parallel programmes playing complimentary and synergistic roles.

Introduction

In chemical laboratories, the use of acids, alkalis and some hazardous and explosive chemicals is unavoidable. In addition, some chemical reactions during the analysis process may release toxic gases and, if not handled well, may cause an explosion. Inflammable gases are also used as a fuel/heating source. Thus, work safety in a chemical laboratory calls for special care both in terms of the design and construction of the laboratory building, and in the handling and use of chemicals.

For chemical operations, it is also necessary to provide special chambers. The air temperature of the laboratory and work rooms should be maintained constant at 20–25°C. Humidity should be kept at about 50 percent. Temperature and humidity often affect soil and fertilizer samples. Temperature also affects some chemical operations. Hence, maintaining the temperature and humidity as specified is critical.

Electron microscopy is a specialized branch of science, which uses the electron microscope as a tool. The electron microscope is an instrument which magnify smallest object thousands times. The magnification is not only requirement to see the smallest otherwise invisible object but the details of the object are most important. The details of the object are depending upon the resolving power of the microscope, which is known as the resolution of the microscope. This resolution or power of the microscope is depends upon the wavelength of the illuminating source. The smallest the wavelength of the illuminating sources is the best resolution of the microscope. Electron microscopes use electrons as an illumination source to take advantage of the very short wavelengths attainable in electron beam, which permit a considerable improvement in resolution over the light microscope.

Extension

Extension is that type of education which is stretched out to people in rural areas far and near, beyond the limits of education institutions to which the formal type of education is usually confined.

Education

Education is a process of bringing about desirable changes in the behaviour of human being.

Formal education: The hierarchically structured, chronologically graded ‘education system’, running from primary school through the university and including, in addition to general academic studies, a variety of specialised programmes and institutions for full-time technical and professional training.

Informal education: The truly lifelong process whereby every individual acquires attitudes, values, skills and knowledge from daily experience and the educative influences and resources in his or her environment - from family and neighbours, from work and play, from the market place, the library and the mass media.

Non-formal education: Any organised educational activity outside the established formal system - whether operating separately or as an important feature of some broader activity - that is intended to serve identifiable learning clientele and learning objectives.

Introduction

Extension is a form of education, and extension services provide information, advice, and education for rural development in many countries. It was used for sharing ideas, beliefs, knowledge, and information with rural people in an informal way. In the mid-nineteenth century, extension services were institutionalized, and public funding was spent for organized extension activity in rural areas.

Extension Education

The word ‘extension’ is derived from two Latin roots, namely ‘ex’ meaning ‘out’ and ‘tensio’ meaning ‘stretching.’ Hence, extension means stretching out Figure 1.1.

Extension does not have a universally recognized definition. According to Webster, education is a process of teaching to develop the knowledge, skills, and character of students. Sociologist Rodney Stark declares that “Education is the cheapest, most rapid and most reliable path to economic advancement under present conditions.” Education is a lifelong process, and it is necessary to transfer experience and knowledge to the next generation for political and socio-economic development.

University extension started at Cambridge University, London University, and Oxford University before the nineteenth century. The success of extension in Britain led to the initiation of extension education in the United States later. In India, university extension was introduced after the establishment of State Agricultural Universities in a similar pattern to Land Grant Colleges in the United States.

Extension as a form of education facilitates the learning or acquisition of knowledge, skills, values, and habits. As an education, it can be informal, formal or non- formal. It can also be categorized as child education, adult education, technical education, health education, social science and humanities, etc.

Formal education: It is an institutionalized, chronologically graded, and well- structured system of education that starts from schooling to higher education. Formal education is usually given in structured classrooms in schools and colleges with a fixed syllabus, course curriculum, and certificates awarded after examination. In formal education, only qualified teachers impart education to the students.

Flow Cytometry is a tool used to detect and measure chemicophysical characteristics of a population of cellular particles. Modern day biomedical research needs the molecular assembly of tools to proceed in the advent of biomedical research with real time diagnostic, prognostic and experimental detection of markers. For the same, a naïve tool is flow cytometry. In this technique, a sample having cells or particles is suspended into a fluid and injected into instrument. The ability to perform these measurements in a very rapid time span is one of the key advantages of the flow cytometry process. A single-cell suspension must first be prepared in order to analyse solid Tissues. A flow cytometer is look alike to microscope, except that, instead of producing an image of the cell, it generally offers a cell-by-cell basis high-throughput, automated quantification of specified optical parameters.

They can quantify up to three to six properties or components are quantitated in a single sample, cell by cell, for about 10,000 cells, in less than one minute. Sample is focused to ideally flow one cell at a time through a laser beam, where the light scattered is characteristic to the cells and their components. These cells are tagged with fluorescent markers in order to absorb the light and then emitted them in the form of band of wavelengths. Average ten thousand cells can be quickly examined and the data gathered are processed by a computer.

7.1. Introduction

Cultivation of crop is one of the most important aspects on which the success of a greenhouse depends. Principally it is similar to that of open field cultivation; but it is a completely different proposition in comparison. In greenhouse it needs (1) high precision technology, (2) special management, and (3) high qualityinputs. A special crop husbandry is extremely necessary, integrating all these three aspects, for successful greenhouse cultivation.

Why special crop husbandry? – Ancestors of each and every crop of modern time once grew out of its own in wild, without any human intervention. Gradually it has been domesticated or brought under cultivation by progressive alteration of its natural growing and reproduction process. Even the genetic nature also altered gradually. Till recent past these development of domestication process has been restricted principally on reproduction, planting, nutrient supply, water supply, and plant protection aspects. Interestingly most of these aspects are still very much supplementary in nature, as a good percent of it is still dependent on nature and its growing system.Actually, we cannot confer any significant change, physically or genetically, in their adaptation against the natural elements like rain, sunlight, temperature, humidity, gas supply, etc. However, we try our level best with a compromising note on local climate.

Hence there is ample scope to go for complete alteration of their growing habit/ practices in relation to each and every aspect of the climatic elements. It is a very difficult job, because, for a small change in any individual aspect of plant growth, all the other aspects are affected. Thus, one has to make a proper and holistic balance of alteration of all the growth aspects for each and every individual domesticated plant, we call as crop.

Landscape Gardening

Landscape gardening is an aesthetic branch of Horticulture which deals with planting of ornamental plants in such a way that it creates a picturesque effect. According to Chambers’ dictionary, the definition of landscape is the appearance of that portion of land which the eye can view at once and landscape gardening is the art of laying grounds so as to produce the effect of a picturesque landscape. Landscape gardening can be defined as the decoration of a tract of land with plants and other garden materials so as to produce a picturesque and naturalistic effect in a limited space. According to Bailey, Landscape gardening is the application of garden forms, methods and materials to the improvements of the landscape and the landscape in this connection is any area large or small on which it is desirable to develop a view or design. So landscape may or may not include plants.

Landscape gardening can also be defined as the beautification of a tract of land having a house or other object of interest on it. It is done with a view to create a natural scene by the planting of lawn, trees and shrubs. Landscape gardening is both an art and science of the establishment of a ground in such a way that it gives an effect of a natural landscape. It can be also defined as the imitation of nature in the garden. It can also be defined as improving of total living environment for the people. In light of all the foregoing definition landscape gardening can be defined more appropriately as art of creating gardens, parks and other green areas.

Landscape design seeks to create balance between living and natural environments in order to derive the greatest use and enjoyment from outdoor space. A landscape to a landscape designer is like a slab of marble to a sculptor or the insides of a home to an interior decorator; a landscape is the canvass on which the landscape designer crafts his or her masterpiece. Since the landscape gardening is the making pictures on the ground with plant and other material, landscape designer should be proficient in art, ornamental gardening, ecology and physiology. He should be an architect and engineer to appreciate the relationship between plant form, colours and buildings.

SUMMARY

In the context of increasing population pressure, diminishing per capita land holding, and employment crisis, livelihood security of Indian rural population has become important concern today. The livelihood of the people is dynamic, diverse and complex in nature. The livelihood comprises the people themselves, the assets they posses, the activities they do and the output they gain from their activities. According to the need, availability of the resources and capacity, people used to select their livelihood strategies like agricultural intensification, livelihood diversification or they migrate to the other places to find alternative livelihoods.

Deoxyribonucleic acid (DNA) is a molecule made up of pairs of building blocks called nucleotides. The four kinds of nucleotides that make up DNA are adenine (abbreviated as the single letter A), guanine (G), cytosine (C), and thymine (T). The DNA molecule has the shape of two intertwined spirals, referred to as a double helix. DNA is packaged into chromosomes that are located within the nucleus of all cells. These chromosomes are the same in every cell of an organism and together make up the organism’s genetic information, its genome. Chromosomes contain stretches of DNA called genes that code for amino acids that make proteins. It is the proteins that are the foundation of life for all organisms. The interaction and structure of proteins determine the visible characteristics or phenotype of an organism, while the genetic makeup of an organism is called its genotype.

The sequence of nucleotides that make up a gene can differ among individuals. The different forms of a gene are called alleles. The alleles are the result of nucleotide differences in a gene that affect an amino acid sequence of a protein. This can result in a change, addition, or deletion of a protein that can affect the phenotype.

Introduction

Electrical Engineering generally uses a consistent, structured approach to the solving of various practical problems. An acceptable problem-solving approach and method can be defined, although variations can be seen in specific problems. Problems need to be approached methodically, applying an algorithm by which engineer arrives at an acceptable solution.

Problem-Solving Process in Engineering: (i) Define the engineering problem (ii) Create a mathematical model (iii) Develop a computational method for solving the problem (iv) Implement the computational method (v) Test and assess the solution.