eChapters

Introduction

Seed is a living entity (mature ovule) consisting of a tiny plant in embryonic stage along with the stored food protected by an outer layer known as seed coat. Seed is an important biological input in agriculture, which is economically important for successful crop husbandry. Cotyledons serve as the source of nutrients (proteins, carbohydrates, and oils) that not only nurture the plant at the early developmental (seedling) stages of plant but also the vegetarian (heterotroph) organisms. Being one of the important inputs in agriculture, viability of seed needs to be assessed to know the germination percentage of seeds used to raise a crop. Since viability of seeds may deteriorate on storage depending on the storage conditions. Therefore, often it becomes important to test viability/germinability and vigour of seeds before being used for raising a crop or conducting an experiment. In this chapter, we briefly discuss about the different methods which can be used for testing the viability of seeds.

Seed Viability

Seed viability can be defined as the capability of the seed to germinate and produce a normal seedling within a specified period. In other words, seed viability indicates how many seeds in a lot are alive and could develop into plants under appropriate field conditions. It is very important that most of the stored seeds are capable of germinating when sown in a field. They must possess higher viability at the beginning of storage and maintain it over the storage. A seed with high initial viability survives longer in storage; however, the viability deteriorates slowly at first and then rapidly as the storage prolongs. It is important to know the duration of storage after which a considerable decline in viability occurs under given storage conditions so that to take necessary action to revive the seeds. Excessive deterioration in vianility of seeds may lead to loss of the seed/material/ germplasm.

The growing chemicalization of milk presents a great challenge to the dairy industry. A number of chemical compounds get entry into milk, intentionally or un-intentionally, through their direct or indirect usage for crop, animal; or dairy husbandry practices, as environmental contamination. Several of these contaminants may be naturally present on grazing grass or use as pesticides for green fodder or they may get entry through use of compounded animal feeds. These eventually get excreted into milk as residues and pose problems to food safety. The risk of health hazards arises from veterinary drugs, residual pesticides, heavy metals, detergents and micotoxins etc. It is therefore, become necessary to detect these contaminants in order to make food safe for human consumption.

Detection of Aflatoxin M 1 in Milk

Material requirements : Glass column(30 cm x 1 cm), Silica gel (63-200 µg particle size), volumetric flasks, beakers, micro pipette, HPLC equipment fitted with C 18 column(25 cm x 4.6 mm) and fluorescence detector.

Reagents: Sodium chloride solution (400g in 1000ml water), acetonitrile/water mixture (25:75), sodium sulphsate, chloroform, toluene/acetic acid mixture (9:1), acetonitrile/diethyle ether/hexane mixture (1:3:6), chloroform/acetone mixture (8:2), n-hexane and aflatoxin standard ampule.

Preparation of stock solution : Transfer contents from 2.5ml or 0.5ml ampoule, quantitatively, to 25ml or 50ml volumetric flask respectively. Rinse ampoule with small quantities of chloroform and collect rinsing into flask. Makeup the volume with chloroform, mix well and store at 5º C or below. These solutions will contain 1 µg per ml aflatoxin M1.

Working solution : Transfer 0.5ml of stock solution to a 10ml conical flask. Evaporate contents to dryness using inert gas. Dissolve residue in 10ml of acetonitrile/water mixture. Prepare series of dilutions containing 0.0025, 0.005, 0.01 and 0.025 µg/ml aflatoxin. Similarly treat 5ml of stock solution to give a concentration of 0.5 µg/ml.

Introduction

Preceding chapters discuss the essentials of probiotics, their role in maintaining gut health in combination with prebiotics and significance of systematic classification of probiotic isolates. Further, to draw an idea how probiotics function in the gut, it is essential to know the interaction of probiotics with other microorganisms in the gastrointestinal milieu - the site of their probiotic action. Knowledge in the ecology of probiotic microorganisms in host environment such as gut gives an ideal picture of their functioning manner and the factors (both host and microbial) responsible for it.

Study of microbial ecology in the gastrointestinal tract is very difficult since gut harbors highly diversified microflora that varies not only at species level but also at individual level. The diversity of gut microflora in two healthy individuals of same species may exhibit variations in their composition and it may be influenced by geodemographic factors also. In this regard, the present chapter deals with the study of ecology of Lactobacillus- most commonly used probiotic bacteria in the gastrointestinal tract which in turn helps in framing selection criteria for screening of potential probiotics.

Recent studies on interaction between human and gut microflora discussed that co-evolution between microorganisms and their host have contributed for the development of a very complex microbial diversity in the gut. Highly diversified microflora in the human gut is a consequence of natural selection at two levels, top-down and bottom-up selection pressure. Hierarchy theory expounds that higher levels compel lower levels for possible organizational solutions i. e. organisms at the higher levels govern the structure or population dynamics of an ecosystem while on contrary lower levels control the structure of ecology when bottom-up level is the selection pressure. In case of interaction between human and gut microflora, being host human is at higher level in the hierarchy for selection and as mentioned above, top down selection pressure is driven by higher levels; host selects the beneficial microorganisms for functional redundancy leading to the development of a microbial community with divergent microbial divisions. Chances for lateral gene transfer also thought to influence the selection process and there by structure of the microbial community. On the other hand, competition among the members of host selected microbiota exert bottom up selection pressure resulting in the development of highly specialized genomes with functionally prominent set of genes. Natural selection at host level obviously favors functionally constant microbial communities which benefits the host with functional redundancy encoded in their genomes. Mean while bottom-up cell-level selection pressure aspire to favor niche specialization to avoid competition between the members of microbial community. In order to be a part of specialized niche, to become more potent microorganisms adapt a particular set of abiotic and biotic factors within the habitat by acquiring new sets of genes essential for their survival and thus escape the competition from decrepit microbial species.

28.1 Introduction
This Act established the Food Safety and Standards Authority of India (FSSAI) to define science-based criteria for food products and control their production, storage, distribution, sale, and import, thereby guaranteeing the availability of safe and nutritious food for humans by aggregating food-related legislation. From the farm to the refrigerator, the FSSAI protects every step to ensure customers all throughout India get milk and milk products free of contamination. The FSSAI has instituted particular rules acknowledging the importance of milk in the Indian diet and the possible health hazards of adulteration or contamination. These criteria cover everything from the quality of dairy farm cleanliness procedures and calf nutrition to processing, packaging, and milk and product distribution. By establishing and following these guidelines, FSSAI not only safeguards the health of millions of people but also fosters consumer trust so that milk and its derivatives may be included into everyday meals.
28.2 The Food Safety and Standards Act
Confusion among consumers, traders, producers, and investors results from the several food laws and several authorities in charge of establishing and enforcing standards across several food industries. Different laws provide different standards by including thorough clauses on the admissibility and degrees of food additives, pollutants, colours, preservatives, and other relevant criteria. Many times rigid and out of line with scientific progress and modernism, these criteria also reflect The developing food processing sector is hampered by this diversity of legislation and the participation of several bodies, therefore hindering the efficient creation and execution of food standards.

Ice cream is a complex multiphase food system in which fat, proteins, sugars, water, air, ice crystals, and stabilizers interact to determine its structure and eating quality. This chapter introduces the scientific principles governing ice cream composition, microstructure, freezing behaviour, and processing. It explains freezing-point depression, ice-crystal formation, colloidal behaviour, foam development, and structural changes during processing. Particular attention is given to the relationship between microscopic structure and sensory properties such as smoothness, creaminess, body, and meltdown. By connecting food chemistry with processing technology, the chapter establishes the scientific foundation required to understand formulation, manufacturing performance, quality control, and product stability.

Packaging is not only an integral part of product presentation but also plays a vital role in preserving food quality and extending its shelf life. In a world where food must travel vast distances from producers to consumers, often across varying climates and storage conditions, effective packaging is essential. It serves multiple functions, from protecting food against physical, chemical, and biological hazards to providing a medium for branding, regulatory compliance, and consumer convenience. This chapter explores the fundamental need for packaging in the food industry, emphasizing how packaging contributes to the safety, longevity, and accessibility of food products. By examining the protection, preservation, distribution, and sustainability aspects of packaging, this chapter highlights its significance in modern food production and distribution systems. 2.1. Protection, Preservation

Synopsis

If the human being was born first, he or she needed food immediately to survive. Thereafter, human beings continued to need food and continued to eat food throughout his or her life. Hence, the relationship between human being and food is permanent and the requirement of food for the human being to be alive is everlasting. The paper provides the background, definition of right to food, and adequate food, historical events, legal perspectives, operational guidelines, and advances in its application and derives conclusion.

Introduction

The Indian dairy industry plays a vital role in the nation’s economic and social fabric, deeply connected to the livelihoods of millions of rural families. It is more than just a source of income; for many small-scale and marginalized farmers, it provides a lifeline, ensuring stability and sustenance in areas where opportunities are often scarce. At the same time, the industry faces the immense responsibility of balancing economic growth with ethical practices, environmental conservation, and the welfare of the communities it serves. In this complex environment, businesses operating within the dairy sector have the potential to make a meaningful difference, but only if they prioritize social responsibility alongside profitability. By embracing sustainable practices and fostering inclusivity, these enterprises can address critical challenges while contributing to a more equitable and resilient industry (Christie, 2020; Rotz et al., 2020; Clay et al., 2019).

For the dairy industry, social responsibility is not an abstract concept; it is a pressing need. Across India, small-scale farmers form the backbone of this sector, especially in rural regions where economic vulnerability is widespread. These farmers often face numerous challenges, including fluctuating milk prices, limited market access, and a lack of resources to improve productivity (Kamath et al., 2019; Sadashive et al., 2017). Businesses in the dairy sector can act as catalysts for change by creating fairer systems, empowering marginalized groups, and ensuring that ethical treatment of livestock becomes standard practice. Beyond its immediate economic impact, the industry has a profound role to play in addressing broader social issues, such as gender inequality and food security, while promoting sustainable development that benefits everyone involved (Jaiswal, 2018; Garai et al., 2019).

1. The Stability and Shelf-Life of Food

    1.    In the UK, the date coding to be used is determined by the total life of the product: for microbiologically highly perishable foods, a ‘use by’ date is needed, while for other foods, including foods with more than 18 months’ shelf-life, a ‘best before’ or a ‘best before end’ date is needed.

    2.    IFT (1974) definition of shelf-life, is : The period between manufacture and retail purchase of a food product during which the product is of satisfactory quality.

    3.    Shelf-life is defined as the time during which the food product will :

        i.    remain safe;
        ii.    be certain to retain desired sensory, chemical, physical and 
    microbiological characteristics;
        iii.    comply with any label declaration of nutritional data,

Permeability is a fundamental concept in food packaging, shaping the protective capabilities of packaging materials by determining the extent to which gases and vapors can move through them. This property plays a crucial role in preserving food freshness, safety, and quality by controlling the interaction between the food product and its surrounding environment. Understanding permeability is essential in designing packaging solutions tailored to the specific requirements of different food products, as improper permeability can lead to accelerated spoilage, nutrient degradation, and undesirable changes in texture and flavor. In this chapter, we explore the science of permeability in food packaging, breaking down its core principles, the behavior of different gases and vapors in various packaging materials, and the factors influencing permeability. Additionally, we examine how permeability impacts shelf life and consumer satisfaction, offering insights into selecting materials for specific food types. By understanding and manipulating permeability, food manufacturers can develop packaging that optimally balances protection and breathability, extending product shelf life and ensuring quality

Introduction

Therapeutic foods are products, which are multiutility food products that may be used as nutrition as well as medicine. A nutraceutical may be defined as a substance, which has physiological benefit or provides protection against chronic disease. Nutraceuticals are used to improve health, delay the aging process, prevent chronic diseases, increase life expectancy, or support the structure and/or function of the body. Oflate nutraceuticals are receiving considerable interest due to potential nutritional, safety and therapeutic effects. The examples of therapeutic foods are the foods used for feeding of malnourished children on an emergency basis or to supplement the diets of persons with special nutrition requirements, such as the elderly. Therapeutic foods can also form a part of treatment/prevention/reduction of other health conditions such as diabetes, cardiovascular disease, obesity, anaemia and any other lifestyle disorders.

The incidences of diet-related diseases are progressively increasing due to greater availability of calorie-rich foods and a sedentary lifestyle. Obesity, diabetes, atherosclerosis, and neurodegeneration are major diet-related diseases. Nutraceuticals and functional foods represent a novel therapeutic approach to prevent or attenuate diet-related diseases.

There is always a requirement for cheaper formulations using locally available ingredients that are processed in a safe, reliable, and financially sustainable methods. Some of the literature available on health foods for various diseases is summarized below. However, since the burden of diabetes in India is staggering. In 2017, 72 million cases of people suffering from diabetes were reported and the figures are expected to reach 134 million by 2025, this chapter more emphasis is given on the safe, natural treatment/reduction of diabetes by herbal means.

Introduction

It is the process of retaining food over a period of time without being contaminated by pathogenic organisms or chemicals and without losing its colour, texture, flavour and nutritious value. It involves preventing the growth of bacteria, fungi and other microorganisms, as well as retarding the oxidation of fats which causes rancidity.

Objective

• To increase its shelf life, retaining original nutritional values, colour, texture, and favour.

Abstract

Application of solar energy for drying of agricultural food products is one of the most attractive and cost-effective drying techniques. However, the intermittent nature of the solar energy is one of the major shortcomings of the solar drying system that can be alleviated by storing excess energy during the peak time and using it in off sun hours or when the direct availability of solar energy is inadequate. The use of sensible and latent heat storage systems in solar dryer is an effective way of storing thermal energy for drying purpose. This chapter will present information on different thermal energy storage (TES) materials, their advantages and disadvantages. The information available in the literature regarding the studies conducted on TES assisted solar drying systems is also covered in this chapter. In addition, some of the models that have been used by different researchers to test the performance of different TES materials are also reviewed.

Thermal preservation is among the most established methods for improving the safety and storage life of food. It uses controlled heating to destroy spoilage organisms and pathogens and to inactivate undesirable enzymes. Processing intensity varies according to the target microorganisms, food composition, packaging and required shelf life. Pasteurisation reduces pathogenic and spoilage microorganisms without achieving complete sterility, while sterilisation destroys more heat-resistant organisms and spores to produce commercially stable foods. Ultra-high-temperature processing combines very high temperatures with extremely short treatment periods. This chapter also discusses retort processing, thermal-death kinetics and microbial-inactivation models used to design safe processes while minimising nutritional and sensory damage.

Introduction
Heat treatment is the most commonly used method in the dairy industry for milk processing. Its primary objective is to eliminate pathogens and reduce spoilage-causing organisms, ensuring milk is safe for consumption and has a longer shelf life. While advanced methods like high-pressure processing, pulsed electric fields, ultrasound processing, cold plasma treatment, and ultraviolet sterilization have emerged, heat treatment remains the preferred choice due to its simplicity, reliability, and proven effectiveness. All dairy products undergo some form of heating during processing, whether through pasteurization, sub-pasteurization (e.g., for milk used in aged cheeses), or sterilization. To facilitate this, liquid heating systems such as continuous heat exchangers or jacketed tanks are widely used, typically powered by steam or steam-heated water. Consequently, steam generation boilers are a standard feature in almost all dairy processing facilities.
The Key Objectives of Heat Treatment Include
1. Elimination of harmful pathogens in milk, ensuring it is safe for consumption and protecting public health.
2. Increasing the keeping quality of milk by reducing the number of spoilage organisms.
3. Inactivating enzymes naturally present in milk or secreted by microorganisms to prevent enzymatic degradation.
4. Preventing the autoxidation of lipids, which can lead to off-flavors and spoilage.
5. Inactivating agglutinin to reduce rapid creaming and maintain uniform consistency.
6. Enhancing the growth of starter cultures by eliminating natural inhibitors and dissolved oxygen in milk, essential for producing cheese and fermented products.

Thermal processing also known as heat processing is commonly used processing method which helps in extending the shelf life of the food productswith high safety level, convenience and a healthy product.Seafood as a whole food is highly nutritious. Benefits to human health associated with the consumption of seafood is well recognized for multiple bodily organs and physiological functions but their high perishable nature is a concern. Seafoodundergoes spoilage due to autolytic, microbial action as well as oxidation of lipid. Proper handling and preservation is essential to maintain quality of fish. Heat processing is an age old preservation method practiced in many countries to extend the shelf life of food products. Heat treatment causes the destruction of microbes which increases the shelf life. There are number of thermal processing operations like- baking, blanching, canning, dehydration, extrusion, frying, pasteurization, sterilization, etc. All these operation serves various purposes and helps in manufacture of different food products.

Thermal processing is of utmost importance to low acid high water activity foods, where there are no hindrances to microbial growth. The proper delivery of heat is essential to cause the destruction of microbes to avoid food spoilage. In seafood’s processing, thermal processing through canning (retort pouch processing) is a common approach. In canning, the food is preserved by application of heat in hermetically sealed cans (pouches). Hermetic sealing means- complete airtight sealing. This prevents contamination from outside. Heating at very high temperature ranging from 110 to 135⁰C for a desirable time helps in killing all the vegetative forms of microorganisms as well as most heat resistant microbial spores. The amount of time needed for processing is different for each food type depends on hurdles present in the food and heat transfer characteristics. In thermal processing of seafood products, heat processing is aimed for the destruction of spores of Clostridium botulinum. A number of thermally processed ready-to-eat (RTE) products are available on market shelf.

INTRODUCTION

By the turn of the century, consumers have been more demanding, sophisticated and discretionary. They want much safer, higher quality, and more convenient to foods. The food processor need to get the best from their existing processing technology in addition to looking for newer ones. New and alternative food processing methods and/or novel combinations of existing methods are continually being investigated by the industry in pursuit of producing better quality foods more economically. Thermal processing is one of the most important food preservation techniques that was first introduced at the beginning of 1800 and has evolved itself in to one of the most scientific mature food processing techniques of recent times. Both science and technology have gone through tremendous transformation in the last two centuries and today it is the most reliable method to assure food safety and stability. Developments in thermal processing and evolution of non-thermal processing technologies like high pressure processing, pulsed electric field, pulsed light etc. have enhanced the utility of thermal processing principles and increased the awareness of possible alternative processing technologies.

1. INTRODUCTION

Thermal processing means preservation by application of heat. It involves heating of foods in hermetically sealed containers for a specific time at a specific temperature to eliminate the microbial pathogens that endanger public health and that micro-organisms that deteriorate food during storage. The credit for invention of thermal processing (Canning) goes to a French Confectioner, Nichola Appert. The application of heat is an important method of preserving foods and is also a means of developing texture, flavour and colour in some foods.

4.1 Introduction

The food preservation may be define as the state in which the food may retained over a period of time without being contaminated by pathogenic organism or chemicals and without losing its colour, texture, flavour and nutritional value. All the methods of food preservation must provide such an environment in and around the preserved food so that it produces one or more unfavourable conditions to the continued activity of the spoilage agents. The various methods used for food preservations are:

1. Introduction

Thermodynamics is science of energy and may be defined as “The branch of science which deals with the Interoction between the heat and work is referred as Thermodynamics

’Thermo’ means heat and ’dynamics’ means motion. It deals with energy interaction when work is converted into heat energy or vice versa. Precisely, thermodynamics may be defined as a science which deals with energy transformation from one form to another and dealing with relationship among the properties ofthe system. In power plants, internal combustion engines, boilers, nozzles, diffusers etc. are the example where heat is converted into work. In compressor, turbine, cooling of engines by water, application of brakes in a vehicle etc. are the examples where work is converted into heat.