eChapters

Volumetric Analysis Precautions

1. Use Clean Glassware: Ensure all glassware, such as burettes, pipettes, and volumetric flasks, is thoroughly cleaned and rinsed with distilled water to avoid contamination and ensure accurate measurements.

2. Clean Glassware Properly: Before use, all glass apparatus should be thoroughly cleaned with a cleansing mixture of potassium dichromate (K2 Cr2 O7 ) and concentrated sulfuric acid (H2 SO4 ) to remove any residual contaminants. After cleaning, rinse the glassware thoroughly with distilled water to ensure no traces of the cleansing mixture remain.

3. Proper Calibration: Calibrate all measuring instruments, including burettes, pipettes, and balances, before use to maintain accuracy in measurements.

4. Avoid Parallax Error: When reading the meniscus level in a burette or volumetric flask, ensure the eye is at the same level as the meniscus to prevent parallax error.

5. Use Correct Indicators: Choose the appropriate indicator for the titration based on the type of reaction and the pH range of the endpoint to ensure precise determination of the endpoint.

Nature has made such a beautiful system that a fruit does not spoil unless its outer covering is removed and till it is there on the plant. For example banana will not spoil for long time if we do not remove its peel. Similar is the case with apple, guava, mango and many other fruits and vegetables. But as soon as the outer covering is removed the damage begins and the commodity is spoilt very soon.

Preservation is extending shelf life of fresh or processed food by using various methods and prevention or reduction of spoilage. Better the preservation, lesser the spoilage, more the spoilage poorer and inefficient is the preservation.

Therefore, in order to prevent or reduce the spoilage, we have to first identify and understand the causes of spoilage. There are chiefly 3 agencies that cause spoilage in fruits and vegetables i.e. (i) microorganisms, (ii) enzymes & chemical changes and (iii) man, animals, rodents, insects, etc. For effective preservation we have to check the growth and activity of these spoilage causing agencies. So, in order to prevent spoilage and preserve a perishable commodity for long time the following principles and methods are to be followed.

3.1. Introduction

Food preservation can be defined as the science which deals with the process of prevention of decay or spoilage of food thus allowing it to be stored in a safe condition for future use. Scientifically, preservation may be defined as a science which deals with the process for prevention of decay. All foods gradually undergo deterioration or spoilage from the time they are harvested or manufactured. Some commodities spoil rapidly, while others can keep for longer but limited periods. Spoilage in the food products may be caused due to some physical, chemical and microbial changes during storage. The preservation of these products can be resulted by controlling following physical, chemical and microbial changes.

Analytical Chemistry

The science involving the determination of the constituents in terms of elements and compounds is called Analytical Chemistry. It is used to identify the substances found in a material and to quantify the exact amount of substances in them.

The basic principles involved in Analytical Chemistry are changes takes place in the substances by the process of combination, decomposition, replacement and double decomposition.

Providing balanced nutrition to different groups of dairy cows with varying production levels is a significant challenge for commercial dairy farmers. The production performance of dairy cows is directly influenced by the type of feed provided. Ensuring balanced nutrition is crucial to optimize productivity in milk production and reproduction while minimizing feed costs. Dairy cow rations should consist of high-quality forages, a balanced mix of grains and protein sources, essential minerals, vitamins, and other feed supplements. Proper feeding practices are essential to prevent under or overfeeding and ensure that cows receive the right amount and combination of feed ingredients.
Formulating well-balanced rations that meet the nutrient requirements of cows results in optimal feed digestion and utilization. Transitioning from traditional feeding systems to a total mixed ration (TMR) feeding system is recommended for efficient and profitable feeding of dairy cows. TMR feeding systems have been widely adopted in developed countries due to their effectiveness. Each mouthful of TMR provides a complete and balanced ration for the cows, reducing feed selection by the animals and promoting synchronization of carbohydrate and protein availability in the rumen, leading to lower rumen acidity.
TMR feeding systems offer benefits such as labor savings, the ability to feed various types of feeds, and ensuring a nutritionally balanced ration at all times. While TMR may pose challenges in meeting individual nutrient requirements for each cow, larger dairy farms with multiple groups of cows can effectively manage this issue. By providing a nutritionally balanced ration consistently, TMR feeding systems help cows consume energy close to their requirements while maintaining the physical characteristics of roughage necessary for proper rumen function, ultimately leading to optimal production and economic efficiency.

Body Parts of Farm Animals

It is important to know about the various terms used to indicate different body parts of the animals so that whenever a description of the animal/body part is presented, one could specifically understand it. Some of the terms used to point out different body points of common livestock species have been shown in Figure 2.1.1-2.1.5. Terms which are more frequently used for different livestock species have been depicted in Table 2.1.1.

Introduction

The microorganisms exist as single cell or cluster of cells capable of orderly growth, metabolism and reproduction in two identical daughter cells. These includes cellular organisms {protozoa, algae and fungi (Eukaryotes), bacteria and archaea (Prokaryotes)} and viruses (non cellular entities). The study of microorganisms contribute to understanding of :

1. Basic biological sciences - It acts as a tool for providing the basic information for life processes. The discovery of DNA, RNA, proteins and enzyme functions all came from microbial study.
2. Applied biological sciences - Medicine, agriculture, industry, plant and animal pathology, immunology, plant and animal nutrition, biotechnology all have origin from the understanding of the cell function and metabolism of microorganisms.

This chapter examines cytokines as essential signalling molecules that regulate immune and inflammatory responses. It introduces interleukins, interferons, chemokines, tumour necrosis factors and colony-stimulating factors. Their sources, target cells and biological actions are considered in relation to immune-cell activation, differentiation, migration and communication. The chapter explains important properties such as pleiotropy, redundancy, synergy and antagonism. It also covers antiviral activity, chemotaxis, inflammation, fever and the regulation of humoral and cell-mediated immunity. Special attention is given to excessive cytokine production, cytokine storms and septic shock. These questions help readers understand how cytokines coordinate protective immunity and contribute to immune-mediated disease.

A pH meter is very commonly used for the measurement of the reaction of a solution or a medium. The pH determination with the help of a pH meter is based on the measurement of the electromotive force (e.m.f) of a pH cell consisting of an electrode sensitive to W ions and a reference electrode.

The study of general reproduction and reproductive performance in animals is a vast and intricate field that spans across various species, habitats, and biological systems. Reproduction is a fundamental biological process that ensures the continuity of life across generations. It involves a series of complex physiological and behavioural events, from mating and fertilization to gestation and birth. The general reproduction and reproductive performance in domesticated animals is a fascinating and complex field that has significant implications for various aspects of human society, including agriculture, pet ownership, and conservation efforts. Domesticated animals encompass a wide range of species, from farm animals such as cows and chickens to pets like dogs and cats, and even animals kept for conservation or recreational purposes, such as horses and certain bird species. Each of these species has unique reproductive systems and cycles, and understanding these is crucial for effective management and care. For instance, the gestation period for dogs is typically around two months, while for horses, it’s closer to a year. Similarly, some birds, like parrots, may lay eggs only once or twice a year

Current Status of Seed Production

Organized seed production in the country became possible with the formation of National Seed Corporation (NSC) during 1963, which paved the way for a sound seed industry to come as a consequence of the introduction of hybrid technology during 1961-65. The release of high yielding dwarf varieties of wheat and rice by the 1960’s gave further impetus to the growth of the seed industry in the country. For the total area under cultivation of 26.7 m hac and 44.8 hac of wheat and rice respectively, the seed requirement for these two crops alone come to 32 lakh tones and 13 lakh tones respectively of which the varieties contribute about 98 per cent and the hybrids 2 per cent. Only about 10-15 per cent of the total requirement is met by the seed producers leaving the balance for the farmers to manage and the seed producers have to grab the opportunity to supply quality seed materials in order to increase the production.

Current Status of Seed Production

Organized seed production in India became possible with the formation of National Seed Corporation (NSC) during 1963, which paved the way for a sound seed industry to come as a consequence of the introduction of hybrid technology during 1961-65. The release of high yielding dwarf varieties of wheat and rice by the 1960’s gave further impetus to the growth of the seed industry in the country. For the total area under cultivation of 26.7 m ha and 65 per cent of the area) insect, disease and weeds (10-40 per cent loss) and also poor shelf-life. Hybrid technology have defined solution in several crop plants specially vegetables, cotton, rice etc. with the development of appropriate hybridization and seed production. In 1990-91, the area planted to ‘bought seed’ was about 10.35 per cent. The total ‘bought seed’ was estimated at around 5.91 lakh tonnes valued at Rs 679.80 crores. 

Pesticide poisoning occurs when a pesticide enters the body and interferes with the vital systems of the body. Symptoms can begin anything from 1/2 hour to 24 hours after exposure. The typical symptoms and signs of pesticide poisoning are:

Pesticide poisoning occurs when a pesticide penetrates the body and disrupts its essential systems. Symptoms can appear anywhere from a half hour to 24 hours following exposure. The common symptoms and indicators of pesticide poisoning are:

Initial symptoms may include

First Aid

First aid is the preliminary care of a person who has been exposed to pesticides before getting proper medical attention. The initial step is to remove the person from the source of the exposure by removing pesticide from their skin, removing contaminated clothing, or transporting them to fresh air. Be careful not to contaminate oneself throughout this process.

Pesticide on the Skin

• Remove any contaminated clothes.

 • Drench clothing and skin with plenty of water.

• Clean hair and skin with soap and water.

• Dry the victim and wrap them in clean clothes.

• Prevent the victim from being chilly or overheated.

INTRODUCTION

Plant pathogens induce diverse reactions in the body of their hosts. This result in creation of abnormalities which become visible on the plants. A visible or otherwise detectable expression of abnormal physiology, development, or behaviour in a plant resulting from disease is called symptoms. Normally, a distinction is made between symptoms and signs A symptom of disease is expressed as a reaction of the host to a causal agent, where as, a sign is evidence of disease other than that expressed by the host. Signs are usually the structures of the pathogen.A disease is first noticed by the presence of symptoms and /or signs, and recognition of specific type of symptoms or sign aid in the eventual diagnosis of the disease.

The general systemic states are generalized in nature and involve whole body systems. They are common to many diseases and contribute to the pathogenesis
of the disease. Pathogenesis is defined as the changes in functioning at the cellular level and establishment of disease process. Hyperthermia,
hypothermia, fever, toxaemia, septicaemia, bacteraemia, shock, dehydration, acid-base imbalance, hyponatremia, hypokalemia etc. are some examples of
general systemic states.

HYPERTHERMIA Hyperthermia is a condition characterized by elevated body temperature due to increased heat production or absorption, or reduced heat loss   owing to physical cause. Etiology • Physical causes such as exposure to high environmental temperature, severe and prolonged physical activity especially in hot humid condition or    animals    confined    with    poor    ventilation. • Spontaneous hemorrhage in hypothalamus can cause neurogenic hyperthermia. • Severe dehydration affects the heat loss by evaporation and thus can lead to hyperthermia. • Too much muscular activity.

1 The changes in functioning at the cellular level and establishment of disease process is termed

a) Pathogenesis b) Virulence

c) Prognosis d) None of the above