eChapters

Despite the benefits that minimally invasive surgery and osteosynthesis have brought to fracture management and bone healing, there are still many circumstances where bone healing remains challenging. Large bone defects are serious complications that are most commonly caused by extensive trauma, tumour, infection, or congenital musculoskeletal disorders. In nonunion cases repairing of bone defects with composite biomaterials as defect filler can promote bone regeneration. Currently, the gold standard for bone regeneration is use of autogenous bone graft. In order to avoid morbidity at the donor site or if large amount of autogenous bone is needed, bone substitution materials can be used.

Bone substitution materials can be combined with cells such as mesenchymal stem cells (MSCs) to increase bone formation. Bone-marrow derived mesenchymal stem cells (BMSCs) represent an attractive cell population for tissue regeneration. Bone marrow stem cells are pluripotent cells that have been used to facilitate bone repair because of their capability of differentiating into osteoblasts. Several studies on the regeneration of bone have shown that cultured BMSCs, seeded on different bioabsorbable implants are able to induce bone formation in vivo and lead to improved healing of critical-size defects.

Despite the benefits that minimally invasive surgery and osteosynthesis have brought to fracture management and bone healing, there are still many circumstances where bone healing remains challenging. Large bone defects are serious complications that are most commonly caused by extensive trauma, tumour, infection, or congenital musculoskeletal disorders. In nonunion cases repairing of bone defects with composite biomaterials as defect filler can promote bone regeneration. Currently, the gold standard for bone regeneration is use of autogenous bone graft. In order to avoid morbidity at the donor site or if large amount of autogenous bone is needed, bone substitution materials can be used. Bone substitution materials can be combined with cells such as mesenchymal stem cells (MSCs) to increase bone formation. Bone-marrow derived mesenchymal stem cells (BMSCs) represent an attractive cell population for tissue regeneration. Bone marrow stem cells are pluripotent cells that have been used to facilitate bone repair because of their capability of differentiating into osteoblasts. Several studies on the regeneration of bone have shown that cultured BMSCs, seeded on different bioabsorbable implants are able to induce bone formation in vivo and lead to improved healing of critical-size defects.

Calcium phosphate bone substitutes such as hydroxyapatite (HA) and tricalcium phosphate (TCP) are currently used for bone substitution in many different clinical applications such as repair of bone defects after trauma or tumour and bone augmentation in spinal arthrodesis. Although these bone substitutes are osteoconductive, they often lack the osteogenecity needed to support bone healing in large defects and are slowly degraded in the body. Studies have shown that coating of hydroxyapatite with a calcium silicate layer could encourage cell proliferation and osteogenic differentiation of human bone marrow-derived stromal cells. Silica-calcium phosphate composite in comparison to calcium phosphate-rich biomaterials has a faster resorption rate owing to greater dissolution of Si ions. The use of several growth factors have been studied in bone repair and these factors are known to play a role in differentiation of mesenchymal progenitor cells specific lineages like endothelial cells or osteoblast. Bone morphogenetic protein-2 (BMP-2) has been shown to accelerate bone healing in humans and animal models. BMP-2 acts by osteoinduction and is involved in the differentiation of mesenchymal progenitor cells into osteoblasts. The addition of recombinant human BMP (rhBMP-2) to a self-cross linkable cellulose hydrogels/biphasic calcium phosphate granules construct promotes bone regeneration in a critical-size segmental defect model of non-union in dogs. It is also reported that protein, insulin-like growth factor (IGF-1) stimulates direct migration of human mesenchymal progenitor cells (MPC) and contributes to the recruitment of MPC in bone formation and bone healing.

A. Mesta diseases

1. Anthracnose

Occurrence & severity status

Mesta (Hibiscus cannabinus) is very much prone to be attacked by anthracnose disease (Singh, 2014). It is very destructive disease in India (Ghosh, 1983). The disease also occurs in South Korea with overall disease incidence of 20%. (Kwon et al., 2015).

Symptoms

Symptoms on kenaf plants include dark brown spots on the leaves, petioles and stems. New leaves and shoots are most susceptible to infection (Kwon et al., 2015). Initially the terminal bud is attacked, where stipules and young leaves are affected and develop necrotic spots and withers (Singh, 2014). Mature lesions on fully expended leaves are dark brown and often irregular in shape, and not vein delimited. Later, the infected leaves fall off; Flowers and seed capsules are also affected by the disease (Singh, 2010). The stems are affected in patches. On stem the lesions are elongated and black, which later form cavities and in severe cases, stem-dieback or wilt occurs (Singh, 2010; Kwon et al., 2015).

Abstract

Meta analysis quantitatively summarizes the findings of a large collection of individual experiments. It is a powerful statistical tool since it integrates a vast literature and thus includes large sample size. It leads to a stronger conclusion than traditional literary review as studies are analyzed applying statistical methods. Meta- analysis is increasingly being applied in different fields of biological sciences. It has been emerged as an independent subfield of modern health science researches as in this field very few studies achieve statistical power in isolation. Meta- analysis has also become an integral part of plant science research, e.g., agricultural research, ethnobotanical research, tea and health science research etc. Meta-analysis has few limitations although rigorously conducted meta- analyses are considered more valuable than any single study contributing to the analysis.

Introduction

Production of consumer preferred varieties of fish and fish products have been facing several constraints. Identification of potential constraints is important for growth and development of fisheries sector. The constraints of production and marketing have been examined by a number of researchers in different time and place. In this chapter, it is tried to explain an overview of the different constraints of production and marketing of fish and value added fish.

Constraints of production of freshwater fish

Constraints of aquaculture production in developing countries have been identified by Lee (1997) and categorized them as:

1. natural and environmental (inequitable allocation of land resources, insufficient quantity and degraded quality of water, highly seasonal variation in temperature and natural disaster);
2. socioeconomic (insufficiency of infrastructure for production and marketing, variation of prices of inputs, ageing and poor training of aqua-farmers); and
3. Institutional constraints (inefficiency of extension services, lack of a better organization of producers, shortage of rural finance).

15.1. Introduction

Meta-analysis is a statistical technique used to combine the results of multiple studies to produce a single, more precise estimate of the effect size of a particular intervention or association. It is a powerful tool in research, particularly in f ields such as medicine, psychology, education, and social sciences, where it is often necessary to synthesize evidence from numerous studies to draw meaningful conclusions. This chapter provides a comprehensive overview of meta-analysis, including its history, methodology, advantages, limitations, and applications.

15.2. Historical Background

The concept of meta-analysis dates back to the early 20th century, but it was not until the 1970s that the term was coined by Gene V. Glass. Glass defined meta-analysis as “the statistical analysis of a large collection of analysis results from individual studies for the purpose of integrating the findings” (Glass, 1976). Since then, meta-analysis has evolved significantly, with advancements in statistical methods and software making it more accessible and robust.

15.3. The Need for Meta-Analysis

15.3.1. Accumulation of Evidence

In many fields, particularly in medicine and psychology, a large number of studies are conducted on the same or similar research questions. However, individual studies may have small sample sizes, leading to low statistical power and inconclusive results. Meta-analysis allows researchers to pool data from multiple studies, increasing the overall sample size and statistical power, thereby providing a more reliable estimate of the effect size.

ìMetabolic Diseasesî mean the diseases that occur due to the ìimbalance between the rate of input of dietary nutrients and the ìoutput of productsî (product like new born, milk for young one etc.) and lead to the occurrence of metabolic derangements in the affected wild animal species.

Management of metabolic diseases depends on an early diagnosis. For an early diagnosis, metabolic profile test (MPT) is a diagnostic tool being commonly used in veterinary practice, particularly for dairy herds, to assess the metabolic health of the animals. It helps in an early detection by measuring various blood parameters that indicate the nutritional and health status of the cows for their effective timely management. MPT is based on the principle that the imbalance between input (feed) and output (production) is reflected in the abnormalities of key metabolites in the blood. Key components of the metabolic profile test 1. Energy balance indicators •     Glucose- Reflects energy status and carbohydrate metabolism. Low levels can indicate negative

1 Metabolic profile test to know the nutritional status of a dairy animal, by assessing the blood used components

a) Complete profile test b) Metabolic profile test

c) Compton metabolic profile test d) Dairy animal metabolism test

Metabolic diseases assume the greatest significance in dairy cows and buffaloes during transition period, and occur due to imbalance in input and
output of production. The main reasons of occurrence of metabolic diseases are an imbalance between the rate of ‘input’ of dietary nutrients and ‘output’
of production.

Metabolic disorders in cattle, such as Milk Fever, Ketosis, Fat Cow Syndrome, and Hypomagnesaemia, affect dairy cows post-calving, disrupting blood metabolites and health. Triggers include diet changes, calving stress, and mineral deficiencies. Untreated, these disorders can lead to mild discomfort or severe complications.
Metabolic diseases are most prevalent in high-producing dairy cows due to the breeding and feeding practices aimed at maximizing milk yield. The period from calving to peak lactation is particularly susceptible to these conditions due to the high turnover of fluids and organic materials. The transition period, defined as 3 weeks before and after calving, is crucial for managing nutrient requirements and preventing metabolic disorders.
As milk production per cow has increased over the years, the complexity of nutrition and management for high-producing cows has also risen. The shift from forage-based to concentrate-rich diets at calving challenges rumen adaptation and can lead to negative energy balance. Balancing milk yield and reproduction becomes a critical aspect of dairy farming success.
Given the interconnected nature of these disorders, herd health management strategies are essential for prevention. Regular monitoring and understanding of metabolic diseases are vital for the successful operation of a dairy farm.
Milk Fever
Milk fever, also known as parturient paresis or hypocalcaemia, is a prevalent metabolic disorder in high-producing dairy animals worldwide. This condition primarily affects dairy cows close to calving and is caused by a low level of calcium in the blood (hypocalcaemia). It is a result of dietary errors and can lead to decreased productivity and economic losses for farmers. Milk fever is a significant concern for dairy industry professionals as it can significantly affect milk production, reproduction, and overall herd health.

A. Answer the following questions

1.    What are metabolic diseases?

Ans: It is defined as disturbances of the internal homeostasis of the body brought about by an abnormal change in the rate of one or more critical metabolic processes.

2.    How do you prevent milk fever by nutritional management?

Ans: By providing a ration that contains 0.5-0.7% Ca and 0.3-0.4% P and by feeding 20 Million Units of vitamin D/cow/ day starting about 5 days before calving and continue for maximum7 days postpartum.

3.    What is the nutritional management strategy to prevent grass tetany?

Ans: A salt lick of 10 parts each of MgSO₄ and Ca(PO₄)₂ with 80 parts of salt is effective. Besides a mixture of 2 parts of MgO and 1 part salt is also effective measure.

4.    Write down the preventive measures of ketosis?

Diseases of metabolic origin are commonly known as metabolic disease viz., bloat, acidosis, milk fever, hypomagnesimia, pregnancy toxaemia etc. However, few common metabolic diseases encountered in herd/ flock management are discussed in the chapter. Among these diseases bloat, acidosis and ketosis are generally occurs due dysfunction in rumen. In the rumen, microbial fermentation occurs due to unique structures and environment. Microbes converts fibrous feeds which are of no use for human beings to important product viz., milk meat, hair and fibre etc. Some bacteria and protozoa have isolated from rumen by the researchers and with their fermented products and pathways. Name of the fermented products with the products is presented in the following Table 24.

Key Points

• Electrolyte Imbalance: Regularly monitor and rectify imbalances in potassium, sodium, and other electrolytes dependent on the individual situation. Prompt management requires early detection of metabolic emergencies.

• Fluid Management: To restore intravascular volume and prevent dehydration in many metabolic emergencies, adequate fluid replacement is essential.

• Continuous monitoring of vital signs, laboratory values, and clinical status is essential for evaluating the efficacy of interventions and making necessary modifications.

Introduction

A class of disorders known as "metabolic emergencies" affect metabolism and physiology abnormally in both congenital and acquired forms. Among these ailments are endocrine disorders, thyrotoxicosis, inborn metabolic inefficiencies, and illnesses linked to electrolyte imbalances. Hypercalcemia, hyponatremia, hypoglycemia, hyperglycemia, and diabetic ketoacidosis, as well as hyperuricemia, hyperuremia, and hypercreatininemia due to renal failure, lactic acidosis, hyperammoniemia, and adrenal failure, are metabolic emergencies that pose a life-threatening risk.

Metabolic fingerprinting and profiling provide powerful approaches for investigating global biochemical changes within biological systems. This chapter explains the principles of metabolic fingerprinting and profiling and distinguishes between broad, untargeted characterization and targeted analysis of selected metabolites. It discusses experimental design, sample preparation, analytical platforms, data preprocessing, normalization, statistical analysis, and multivariate approaches used to identify meaningful metabolic patterns. Techniques such as principal component analysis and related statistical methods help reveal differences between biological conditions. The chapter highlights applications in disease investigation, agricultural research, environmental studies, food analysis, and biotechnology, while emphasizing the importance of reproducible analytical procedures and appropriate interpretation of complex metabolomic datasets.

Introduction

While world population is expected to increase from 6 billion to about 8.3 billion, India is likely to be the most populous nation with 1.6 billion in the year 2030. Therefore, it is essential to be prepared to produce sufficient food for the increased population with the application of newer technologies. The consumption of animal food was 10 kg/yr in the 1960s increasing to 26 kg/yr in 2000 and is expected to be 37 kg/yr by 2030 (FAO, 2008; 2009). Large increases in per capita and total demand for meat, milk and eggs are forecast for most developing countries for the next few decades (Delgado et al., 1999). In developed countries, per capita intakes are forecast to change slightly, but the increases in developing countries, with their larger populations and more rapid population growth rates, will generate a very large increase in global demand.

Moreover, an increasing number of consumers demanding healthy and quality foods have pushed researchers into development of technologies that can control the proportion of lean and fat muscle deposition in meat producing animals. A number of technologies have been developed that led to remarkable improvements in the efficiency of animal production and in carcass composition and meat quality. There are some dietary additives and vitamins that may increase protein and muscle deposition, while often simultaneously reducing fat deposition by modifying nutrient metabolism in individuals.

Maintaining a proper acid-base balance is crucial for the health, productivity, and survival of livestock and poultry. The physiological processes that regulate this balance are sensitive to various factors such as diet, environmental conditions, and metabolic disorders. Any disruption can lead to metabolic problems that negatively impact growth, reproduction, immunity, and overall performance. The acid-base balance in animals refers to the maintenance of the blood’s pH within a narrow range, typically 7.35–7.45. It is regulated by three main systems:
Buffer systems
The bicarbonate buffer system is the most significant, comprising bicarbonate ions (HCO3 –) and carbonic acid (H2CO3). It resists rapid pH changes by neutralizing excess acids or bases.
Respiratory regulation
Animals adjust blood pH by modulating the rate and depth of respiration, which affects carbon dioxide (CO2) levels. Increased CO2 leads to acidosis, while decreased CO2 causes alkalosis.
Renal regulation
The kidneys excrete hydrogen ions (H+) and reabsorb bicarbonate, playing a long-term role in maintaining acid-base homeostasis.
Disruptions in these systems can lead to two primary conditions: Acidosis: A state where the blood becomes too acidic (pH < 7.35).
Alkalosis: A condition where the blood becomes too basic (pH > 7.45).
Common metabolic problems.

Metabolic profile testing (MPT) refers to the use of a battery of tests for the diagnosis of subclinical nutritional and metabolic disease in dairy cows on a herd basis. Typically, blood samples from 5-7 animals per production group are tested for various analytes. MPT is most useful in the diagnosis and management of periparturient disease. Specific nutrient imbalances, either deficiency or excess, in the diet of late-gestation cows have been related to increased prevalence of milk fever, hypomagnesemia, retained placentas, downer cow syndrome, mastitis, udder edema, ketosis, hepatic lipidosis, and displaced abomasums.

Metabolism - sum total of all chemical reactions in living cells

Catabolic reactions - degrade macromolecules and other molecules to release energy

Anabolic reactions - used to synthesize macromolecules for cell growth, repair, and reproduction

Can divide metabolism into 4 groups: carbohydrates, lipids, amino acids, nucleotides.

INTRODUCTION

The metabolism of carbohydrates is vital for plant growth and development, and to the yield of major plant products such as starch and sucrose. Starch, sucrose and fructose are the three important carbohydrates which are utilized in most of the higher plants. The majority of sucrose that is synthesized in higher plants during photosynthesis is exported to non-photosynthetic cells (ap Rees, 1992). Starch serves as an important storage for carbohydrate residues. The degradation (breakdown) of starch ensures retaining of important life processes in plants when there is carbon shortage, for instance, during night period in leaves or in resting organs such as potato tubers.

6.1 Metabolism
Dietary components like carbohydrates, lipids, and proteins are continuously broken down and synthesized through various chemical reactions (exergonic or endergonic) that are concerned with energy. These processes not only break them down but also interconvert them for their synthesis. Dietary components, when utilized, are known as nutrients the body. The number of reactions occurring in living cells maintains the body cells and fluid’s homeostasis and dynamic status. To keep the dynamic state of a cell, many reactions are going on to synthesize or break down the different types and sizes of molecules. The total of these reactions is known as metabolism.
The metabolism may be anabolic or catabolic. Further, it may be aerobic or anaerobic, depending on oxygen availability. These four terms are explained below:
I. Aerobic and Anaerobic Metabolism
• Aerobic metabolism-- In aerobic metabolism, the carbohydrates (substrate) in the presence of oxygen are metabolized to release energy, carbon dioxide, and water. The released energy is converted to ATP by two processes in the mitochondria (the Krebs cycle and oxidative phosphorylation). In oxidation, the electrons released from a glucose molecule are transferred to reduced NAD+ and FAD. The oxygen (electron acceptor) is reduced to water. Water formation [from H2(g) and O2(g)] is an exothermic reaction. The energy released from the chemical bond of glucose is captured as ATP, and heat is released.

Introduction
Metabolism encompasses a series of cellular reactions essential for sustaining life in living organisms. These reactions are part of interconnected pathways within cells, ultimately providing the necessary energy for cellular functions. The importance and evolutionary benefits of these pathways are evident as they are conserved across animals, plants, fungi, and bacteria. In eukaryotes, metabolic pathways operate within the cytosol and
mitochondria, with glucose and fatty acids being the primary sources of cellular energy in animals. Metabolism is organized into distinct pathways to optimize energy capture or minimize energy expenditure. It can be divided into two main processes: anabolism, which involves the synthesis of complex macromolecules, and catabolism, which involves their degradation.
Carbohydrates are the major source of energy in the animal’s diet. Absorbed glucose could be utilized by the animal for several functions. The first priority is the formation of glycogen in the liver, which is stored in muscle and hepatic tissue. However, the body stores very little as glycogen (a starch-like compound), and glycogen could be rapidly hydrolyzed back to glucose through a process called glycogenolysis. This helps in maintaining blood
glucose at a narrow range in normal healthy animals. The second priority is oxidation to form energy (a major function) and is described in the next sections. Since glycogen storage is limited, excess glucose is converted to fat and is stored in adipose tissue. This is accomplished by the breakdown of glucose to pyruvate through a process called glycolysis, which is then available for fat synthesis. The catabolism of glucose occurs in two metabolic pathways: glycolysis and the tricarboxylic acid (TCA; also called citric acid or Kreb’s) cycle.
Glycolysis: Enzymes for glycolysis are located in the cytosol of the cell, and glycolysis occurs in this part of the cell. Glycolysis is the breakdown of 6 C glucose into two 3 C end product pyruvates in aerobic metabolism and lactic acid in anaerobic metabolism. It is a catabolic pathway involving oxidation and yields ATP and NADH (reduced NAD) energy. Glycolysis is the pathway by which other sugars (e.g., fructose, galactose) are catabolized by converting them to intermediates of glycolysis. Fructose can be converted to fructose-6- phosphate by hexokinase. Galactose can enter glycolysis by being converted to galactose- 1-phosphate followed by conversion (ultimately) to glucose-1-phosphate and subsequently to glucose-6-phosphate (G6P), which is a glycolysis intermediate.

Introduction to Metabolism Metabolism is the sum of all biochemical reactions (physical and chemical processes) occurring within the body to sustain life. In total, it encompasses all the processes converting the energy from nutrients into usable forms, thereby facilitating the synthesis of biomolecules necessary for sustaining life. This process occurring in all living organisms ensures that a continuous supply of energy and precursors is maintained to perform cellular functions, such as growth, reproduction, maintenance and response to environmental stimuli. Therefore, studying the body’s metabolism provides insights into the physiology, mechanism of disease occurrence and potential therapeutic interventions. Specifically, metabolism is a highly regulated process involving a set of biochemical reactions that can be broadly grouped into: a) Catabolism involves the breakdown of complex molecules into simpler components, releasing energy in the form of adenosine triphosphate (ATP). Catabolic reactions assist in the extraction

Metabolomic databases provide essential information for identifying metabolites, interpreting experimental results, analyzing pathways, and understanding biochemical relationships. This chapter introduces major databases used in metabolomics and explains their roles in modern biological research. Resources such as KEGG, BRENDA, HMDB, MetaboLights, METLIN, and LIPID MAPS provide information on metabolites, enzymes, pathways, structures, spectra, diseases, and experimental datasets. The chapter discusses their applications in metabolite identification, pathway analysis, biomarker discovery, systems biology, and translational research. It also considers challenges including data volume, database completeness, continuous updating, standardization, and integration with other omics resources.

Metabolomic research depends on analytical technologies capable of detecting and characterizing large numbers of chemically diverse metabolites. This chapter introduces the principal analytical platforms used for metabolite analysis, with emphasis on mass spectrometry and nuclear magnetic resonance spectroscopy. Gas chromatography–mass spectrometry, liquid chromatography–mass spectrometry, capillary electrophoresis–mass spectrometry, and NMR are examined in relation to metabolite separation, identification, and quantification. The chapter also considers sample preparation, analytical workflows, advantages and limitations of different platforms, and complementary approaches for achieving broader metabolome coverage. These techniques provide the analytical foundation for metabolic profiling, biomarker discovery, pathway analysis, and systems-level biological investigations.

Abstract

Dietary phytochemicals and herbal medicines are under intensive investigation for their potential as chemopreventive agents against various diseases due to the wide variety of microbial and plant functionally relevant secondary metabolites. The chemical diversity of phytochemicals, as well as phytochemicals and complex metabolic interactions between the biological systems may exceed the capacity of the platforms of traditional analysis, and therefore pose major challenges in the study of chemopreventive phytochemical compounds.

Milk, commonly referred to as the “ideal food,” is an essential source of nutrition for human consumption. Because of the growing human population and the rising demand for milk and milk products, there is more interest in and concern about the quality and safety of dairy products. Milk comprises chemical substances with various functions in the human body, such as carbohydrates, lipids, proteins, and trace elements (vitamins, minerals, etc.) (Guetouache et al., 2014).

Every aspect of the living organism is the sum total result of the metabolism carried out within its cells and in other organisms. Metabolism is the sum total of the chemical reactions occurring in the cell or organism. Metabolism is of two kinds:

1. Anabolism- It is also known as constructive metabolism as it involves synthesis of complex substances from the simpler ones, which are required for growth, maintenance and storage in the organism. Example: Formation of starch from glucose.
2. Catabolism- It is also known as destructive metabolism as it involves breaking of the complex substances into simpler ones, leading to release of the energy required for performing various activities of living beings. Example: Respiration.

Metabolite is the end product or the intermediate product of a biological pathway. Metabolite can be classified into two types mainly:

1. Introduction

Plants offer a rich source of active compounds that have been exploited as scents, flavourings, pigments, pesticides, and medicinal compounds for thousands of years. Plants are thought to utilise these metabolites as a primary strategy for adapting to and surviving in a variety of ecological niches and environmental conditions, as well as to combat biotic intrusions in their environment (Weng, 2014). The increased interest in phytomedicine and medicinal supplements, as well as the increased regulatory obligations for their safety and reputable contents of active compounds, has prompted the development of methodologies for the quality control of multi - component concretes found in plant-derived nutraceuticals. Metabolite diversity in plants is thought to have evolved over time to help plants survive in harsh environments, and it is continually changing. 

INTRODUCTION

Digital resources are growing at an exponential rate and uncountable stacks of resources are available on the web. Semantic based search engines and meta-search engines stimulate resource discovery on digital collections1. During recent years an increasing quantity and variety of digital material has been created or held by libraries, and consequently many standards have been developed to encode different catego-ries of metadata for specific object types. Metadata today is an essential phenomenon for electronic cataloguing, federated searching, and open URLs. Selecting metadata is perceived to be essential for the librarians in pursuing long-term management and preservation of digital objects in digital library. Metadata is also important for digital archivists, database developers, resource authors, web-page designers, aggregators, system designers, as well as seekers of electronic information. In fact, metadata is inevitable for digital resource management and for discovering information from a large distributed environment. Metadata is expected to improve matching by standardizing the structure2 and content of indexing or cataloguing information. The Metadata Encoding and Transmission Standards (METS) were developed to deal with diverse metadata is-sues. It is an XML Schema designed as an overall framework3 within which all the metadata associ-ated with a single digital object can be stored or referred to. It enables effective management of digital objects within the repository; acts as a standard for transferring metadata within repositor-ies, facilitates access and navigation by the researcher, and links the digital object and its meta-data inextricably together.

Summary

Metagenomics is a rapidly developing field of research that enables the study of microbes that have not been cultured or cannot be cultured easily. It has greatly advanced the understanding of ecology and diversity of natural microbial communities and has led to the discovery of many new genes and geneproducts. The various aspects of metagenomics – history, techniques for identification, different approaches of data analysis, comparative and functional genomics, applications in the areas of medicine, agriculture, biotechnology, ecology, bioprospecting, bioremediation, future advances and challenges and issues related to intellectual property, have been discussed.

Key Points

• It is frequently reported that metal, non-metal, and metalloid components cause toxicity in farm animals.

• The type of element causing toxicity affects both the treatment and the clinical indications of toxicity.

• The best course of action for managing toxicity is to treat symptoms f irst, then, if the causal toxin is known, use targeted antidotes.

Introduction

Animal diets contain a variety of environmental components, including metals and non-metals. Certain substances are necessary for the animal and only become poisonous when consumed in excess, while others simply endanger the animal's health. However, a number of variables, including the absorbed dose, the exposure route, the period of exposure (acute versus chronic), and others, affect how toxic the substance is, and these variables must be taken into account when diagnosing, treating, and managing clinical cases. Given the multitude of factors affecting these metals' toxicity. An attempt is made in this chapter to present a streamlined synopsis of the toxicity of metals, non-metals, and metalloid elements that are frequently encountered.

5.1 Introduction
A common method for combining metals in a wide range of applications is welding. Welding takes place in a variety of places, including factories and workshops, as well as outside on rural farms and construction sites. Basic welding techniques can be easily learnt, and the processes involved are quite straightforward to understand. The molecular joining of metals is called welding. When two or more pieces of metal are joined together uniformly such that the joint’s strength is greater than the combined strength of the individual components is known as a weld.
5.1.1 Key Terminologies of Welding
Four materials and other two elements are needed for welding, which are as listed below.
i. Metals
ii. Heat source/ flame
iii. Filler/ flux material
iv. Electrode
v. Air shield
vi. Coatings
To create a single piece of metal, the metals are heated to their melting point while being kept out of the air. A filler metal is then added to the heated area. It can be done under pressure or without pressure. In some cases, filler material need not be used. Air is used as a shield to cover the welding zone from oxidation.
5.1.1.1 Metals
Metals are the workpieces, which are to be joined. These metals may be similar or dissimilar. There are many situations wherein two or more workpieces are to be joined. Consider internal combustion engine in which valve timing gears are fixed over cam shaft. The fixing of the cam over the cam shaft is carried out by welding. Here, the workpieces are the cam and the cam shaft

Surface-Enhanced Raman Spectroscopy (SERS) may detect and identify chemical and biological species ultrasensitively. Through localized surface plasmon resonance (LSPR) effects, metal nanostructures boost analyte Raman signals. This chapter covers current advances and essential principles in metal nanostructures for SERS chemical detection. It discusses SERS fundamentals and enhancing processes, such as metal nanostructure size, shape, and composition. Top-down and bottom-up processes including lithography, chemical synthesis, and self-assembly are used to create repeatable and controllable metal nanostructures. The complex interactions between light, metal nanostructures, and analyte molecules are best understood by combining theoretical modeling and experimental observations. 

4.1. Introduction

Packaging of materials protects, surrounds, and contains food products. It is necessary from processing and manufacturing stage till the final consumption through storage and handling. In 1804, Nicolas Appert, a French confectioner, discovered a method of “conserving all kinds of food substances in containers.” In 1810, the Ministry of the Interior’s Bureau of Arts and Manufactures paid Appert an ex-gratia payment of 12,000 francs on the condition that he publish the details of his process. Appert avoided the use of tinplate in his study. However, in the early nineteenth century (1810), Phillipe de Girard, a French inventor, filed a patent referring to the replacement of glass jars and bottles with tin cases. The official confirmation in the New York Evening Post on July 18, 1822 by Daggett and Kensett is thought to be America’s first offering of preserved provisions in tin cans (Bishop, 1978). Table 1 shows the evolution of metal packaging materials at various stages.

Insects development

Once an insect hatches from the egg it is usually able to survive on its own, but it is small, wingless, and sexually immature. Its primary role in life is to eat and grow. If it survives, it will periodically outgrow and replace its exoskeleton (a process known as molting). In many species, there are other physical changes that also occur as the insect gets older (growth of wings and development of external genitalia, for example). Collectively, all changes that involve growth, molting, and maturation are known as morphogenesis.

Metamorphosis

• Metamorphosis actually means change in form Metamorphosis is derived from Greek word ‘Meta’ = Change, ‘morph’ = form or structure.

• The changes in the development from egg to adult, collectively called Metamorphosis (life cycle).

• Post-embryonic changes in form are collectively called as metamorphosis.

• Metamorphosis refers to the way that insects develop, grow, and change form. Metamorphosis include three developmental processes namely growth, differentiation and reproduction which takes place in larval, pupal and adult stages, respectively.

• Majority of insects pass through profound metamorphosis. The growth of an immature insect is accompanied by a series of molts or ecdysis, in which the cuticle is shed off and renewed. The number of molts varies in most insects from 4-8. However some undergo as many as 20 or more molts. A few insects like Bristle tail silver fish (apterygota) may continue molting even after reaching the adult stage. But most of the insects neither molt nor increase in size once then adult stage is reached. The intervals between the ecdysis are called Stadia. The term instar is applied to form of an insect during stadium. In numbering the instar, the form assumed by the insect between hatching from the egg and the first post embryonic molt is termed “First Instar”.

7.1 Introduction
The preceding chapters have detailed the myriad ways in which meteorological data is collected, from direct in situ observations to various ground-based and space-borne remote sensing platforms. We have also explored the crucial aspects of data formatting, storage, and retrieval, recognizing the immense volume and diversity of atmospheric information. However, the journey from raw measurement to actionable insight is not complete without a critical intermediate step: data quality control (QC) and preprocessing. No observational system, regardless of its sophistication, is entirely free from errors, biases, or inconsistencies. Sensors can drift, communication links can suffer interference, environmental factors can contaminate readings, and automated systems can malfunction. Consequently, raw meteorological data often contains spurious values, missing records, or systematic biases that, if left unaddressed, can severely compromise the accuracy of weather forecasts, the reliability of climate analyses, and the validity of scientific research.
This chapter will delve into the essential processes of quality control, which involves rigorously identifying, flagging, and, where appropriate, correcting or removing erroneous data points. We will explore various automated and manual techniques employed to ensure the integrity and reliability of meteorological observations. Furthermore, we will examine preprocessing steps, which prepare the quality-controlled data for its intended use, including tasks such as unit conversions, interpolation to common grids, and handling of missing values. By understanding the meticulous procedures involved in data
quality control and preprocessing, we gain a profound appreciation for how raw atmospheric signals are transformed into the trustworthy information that underpins all of modern meteorology.

Meteorology is not merely the study of weather patterns; it is a critical science that intersects agriculture and allied sectors in numerous ways. In a world where food security is intimately tied to climatic variability, understanding the basic principles of meteorology is essential for both traditional farming practices and modern integrated food production systems. This chapter explores the foundational concepts of weather and climate, examines the atmospheric dynamics that directly impact agricultural systems, and contrasts historical meteorological practices with modern forecasting approaches. By delving into these topics, we can better appreciate how the environment influences agricultural productivity and how innovative meteorological tools can improve decision-making in the food production chain. Weather describes the state of the atmosphere at a specific time and place. It is the sum of short-term atmospheric conditions such as temperature, humidity, precipitation, wind, and visibility. In contrast, climate refers to the long-term average of weather patterns over a period of decades or more. Understanding this distinction is crucial for agriculture, as farmers and allied sector professionals must respond to immediate weather events (such as sudden frost or heavy rainfall) while also adapting to long-term climatic trends (like gradual temperature increases or shifting precipitation patterns).

Meteorological hazards are severe and extreme weather and climate events that occur in all parts of the world, although some regions are more vulnerable to certain hazards than others. Meteorological hazards include cyclones, droughts, floods, hurricanes, hailstorms, heat waves and tornadoes. The hazard is distinguished from an extreme event and a disaster. An extreme event is simply an unusual event; it does not necessarily cause harm. A disaster is an event that does cause harm in significant amounts. Meteorological hazards are often called as natural hazards. The natural hazards become natural disasters when people’s lives and livelihoods are destroyed.

Hydrological hazards are the result of either excess or a severe lack of water, i.e., flood or drought. Hydrometeorological hazard is a process or phenomenon of atmospheric, hydrological or oceanographic nature that may cause loss of life, injury or other health impacts, property damage, loss of livelihoods and services, social and economic disruption, or environmental damage. Human and material losses caused by natural disasters are a major obstacle to sustainable development. By issuing accurate forecasts and warnings in a form that is readily understood and by educating people about how to prepare against such hazards, before they become disasters, lives and property can be protected.

According to “Artha-sastra”, first book on Governance, Agriculture, cattle breeding and trade, world?s first meteorological Instrument, a “Rain Gauge”, apparently a circular vessel with 20 fingers equivalent width and 8 fingers equivalent depth were installed by Kautilya (Chanakya) during 350-281BC throughout the Mauryan empire (Rainfall measurement:: 1 adhaka = 12mm, I drona = 40 to 50 mm). He is the first person to identify country?s economy depends on Rainfall. Good yield of rain-fed crop requires rainfall of 16 dronas was essential and 4 dronas rainfall is sufficient, also identified rainy season July to December wherein 2/3 annual rainfall receives during Mid-August to October end, now as per IMD norms Southwest monsoon season. He also identified his empire consists of FOUR CLIMATIC zones Tundra/Tropical Rain forest/Semiarid and Arid zones. With the modern seafarers, Columbus (1451-1506) Americus Vespucius (1454-1512) Italian Explorers, James Cook (1728-1779), British Explorer, Ferdinand Magellan (1480-1529), Vasco-de-gama (14601524) Portuguese Explorer and other Navigators of 15th to 18th Century faced severe cyclonic storm and rough weather over high sea felt the need of Meteorological and Navigational equipments. Inventions of modern day instruments started. For Navigators, Quadrant, Mariners Campus (dry), Sand glasses for time measurement (800-900AD) and accurate mechanical Watch (1759) were invented. From the term “NAVAGATHI”, modern term of “NAVIGATION” born. With the introduction of Hot air balloon flight in 18th Century, Air flights (after 1903) our knowledge of weather of upper levels of the atmosphere – knowledge of heights of standard pressure altitudes, Upper Air Temperature, Humidity, Wind direction and speed upto Troposphere. Radio-sonde ascents were commenced in 1936. Radars and Satellite images further increased knowledge about weather and assisting for the preparation of weather inferences useful for Seafarers, flight operators and General Public, Agriculturists, Live-stock managements, national level planners, trade and economists.

2.1. Rainfall

Rainfall is one of the prime natural resource that decide the economy of a country. Inadequate and improper distribution of rainfall during cropping period will have serious threat to crop production resulted in food insecurity of growing population. So each and every action must be focused to conserve every drop of rainfall in an effective way and the conserved rainfall should be utilized in an efficient manner for crop production.

Atmosphere serves as the medium through which pollutants are transported and dispersed. While being transported, the pollutants undergo chemical reactions, which may be lethal or scavenged by chemical or physical process/method. But it all exclusively depends upon the meteorological conditions (Lee et .al, 1994). Historic air pollution episodes reveal that atmospheric conditions influence the pollutant concentrations as well as their toxicity (Goldsmith & Friberg, 1976; Wichmann et.al, 1989 and Pope et.al, 1992). However, the location, duration of release, height as well as the pollutant concentrations are also important, which effect the secondary pollutant transformation under the influence of meteorological conditions, but the atmospheric behavior is independent of their sources (Holzworth, 1974).

Meteorology is defined as the branch of science concerned with the processes and phenomena of the atmosphere. It is also defined as the climate and weather of a region. The word meteorology is derived from two Greek words: Meteor and logus. Meteor means event occurring above the earth surface and logus means to study. Meteorology is science deals with the physics, chemistry and dynamics of atmosphere and also their direct and indirect effects upon the earth surface, oceans and thereby life in general.

Climatology: Climatology is scientifically defined as weather conditions averaged over a period of time. Different regions of the world have different characteristic climates which determine the crops of any region. Climatology is derived from Greek word ‘klima’ – place/zone or slope of the earth and logs is study. It discovers, describes and interprets the climate on the basis of causes and long term effects on variation in regional and global climate. Climatology is the science which studies average condition of weather or the state behavior of the atmosphere over a place or region for a long period of time.

Agrometeorology: Agrometeorology is the study of weather and use of weather and climate information to enhance crop production. Agrometeorology is defined as the branch of meteorology that deals with relationship between weather and climate on crop, livestock production and soil management.

Introduction

There is growing worldwide interest in reducing methane emissions from domestic ruminants. Methane is a potent greenhouse gas and its release into the atmosphere is directly linked with animal agriculture, particularly ruminant production. Methane emitted from ruminant livestock is regarded as a loss of feed energy and also a contributor to global warming. Methane is synthesized in the rumen as one of the hydrogen sink products that are unavoidable for efficient succession of anaerobic microbial fermentation. Various attempts have been made to reduce methane emission, mainly through rumen microbial manipulation, by the use of agents including chemicals, antibiotics and natural products such as oils, fatty acids and plant extracts. A newer approach is the development of vaccines against methanogenic bacteria. While ionophore antibiotics have been widely used due to their efficacy and affordable prices, the use of alternative natural materials is becoming more attractive due to health concerns regarding antibiotics. An important feature of a natural material that constitutes a possible alternative methane inhibitor is that the material does not reduce feed intake or digestibility but does enhance propionate that is the major hydrogen sink alternative to methane. Since methane contains energy, its emission during rumen fermentation is considered to be a loss of feed energy that is equivalent to 2-12% of the gross energy of animal feed (Johnson and Johnson, 1995). Some implications of these approaches, as well as an introduction to antibiotic-alternative natural materials and novel approaches, are provided.

Abstract

Microorganisms that produce methane as their metabolic end product are known as methanogens. Methanogens are prokaryotic, unicellular, obligate anaerobes having fastidious growth requirements making them difficult to isolate and preserve. They catalyse the terminal step in anaerobic breakdown of organic substances. Even though methanogenic archaea or methanogens show very limited metabolic diversity, they are one of the most phylogenetically and ecologically diverse group of Archaea. Methanogenic community varies greatly with respect to temperature. Methanogens have been reported from permanently frozen habitats like permafrost to hyperthermophilic environments such as hydrothermal vents. However, the metabolic and phylogenetic diversity of methanogens in these habitats vary greatly. Methanogens are the biocatalysts, having the ability to provide a solution to help solve energy crisis by producing methane as storable energy carrier. Methane being a flammable gas, can act as a clean and renewable source of energy. The biogenic methane gas thus produced may serve as an efficient alternative for fossil fuels in the future.

Poor quality roughages includes the wheat straw, commonly fed to ruminants but unable to provide any DCP. Urea ammoniation method, not only improves the nutritive value of straw in terms of DCP and TDN, but it also improves the dry matter intake of animal by improving its palatability. In this method of urea ammoniation, one quintal of wheat straw is treated with 4 kg fertilizer grade urea (4%) by dissolving in 40 litre of water (moisture 40%). The dissolved urea is sprayed over several layers of wheat straw and mixed properly and then kept under airtight condition by covering it with polythene sheet for a period of 4 weeks. With the presence of enzyme urease the urea get broken down in to ammonia and carbon di oxide. This ammonia on one hand improves the nitrogen content of the straw and on another hand alkalinity (by ammonia and by ammonium hydroxide) reacts on the lingo-cellulosic bonds to loosen their strength. So by increasing the nitrogen content of the straw it increase the nutritive value of the straw in terms of increasing the DCP value of the straw and on another hand by reducing the bonds of lingo-cellulose it increase the digestibility of crude fiber and hence it also increase the energy (TDN) content of the straw.

Bacterial biofertilizers are supplied as carrier based inoculants. Peat or lignite is used as carrier material. Carrier based bacterial inoculants are applied by the following methods.

1. Seed treatment or seed inoculation.
2. Seedling root dip and
3. Main field application

Seed Treatment

One packet of the inoculant (200 g) 7is mixed with 200 ml of rice kanji to make a slurry. The seeds required for an acre are mixed in the slurry so as to have a uniform coating of the inoculant over the seeds and then shade dried for 30 minutes. The shade dried seeds should be sown within 24 hours. One packet of the inoculant (200 g) is sufficient to treat 10 kg of seeds.

Aim

Study about method of apposing muscle, fascia, skin over amputed stump.

Indication

Proper healing of amputed stump, avoiding infections.

Description

Limb is amputed generally through diaphysis or by disarticulation method. Whatever is the amputation,the surgeon should always keep as much soft tissue as possible to cover the bone extrimities. It is difficult to achieve in large animal, when amputation is immediately below carpus or tarsus.