eChapters

3.1 Malted Milk
Malted milk, originating from the ideas of British pharmacist James Horlick in the 19th century, was initially marketed under the name “Diastoid” before being trademarked as “malted milk” in 1887. Although initially targeted
for infants and invalids, its appeal expanded due to its nutritional value, convenience, digestibility, and palatability. Recognized globally for its lightweight, non-perishable nature, and high-calorie content, malted milk is
created by evaporating a mixture of malted barley, wheat flour, and whole milk until it forms a powder.
There aremainly two types of malt powder: diastatic and non-diastatic. Diastatic malt containing enzymes breaking down starch into sugar, aiding in dough rise and crust formation, particularly in bread making. Non-diastatic
malt lacks active enzymes and is primarily utilized for flavor enhancement, commonly in beverages. It may also include sugar, coloring agents, and other additives to improve taste and appearance.
3.2 Malting
Malting is a crucial process employed in treating cereal grains, such as barley, by inducing germination through soaking in water followed by halting the process through drying or heating with hot air. This technique encompasses two main stages: sprouting and kiln-drying. The term “malt” encompasses several products of this process:
1. Malted grains: These are grains, like barley, that have undergone the malting process.
2. Malt sugars: These are sugars, predominantly maltose-rich, derived from malted grains, often utilized in baking, such as baker’s malt.
3. Malted milk products: These include beverages like malted milkshakes, made using malted milk.

Production- Function- The technical law relating inputs to outputs has beengiven the name of production function. Production function expresses the relationship between physical input and physical output of a firm for a given state of technology.
Law of Variable Proportion or Law of Diminishing Returns (Short Run Production Function)
This law explains the relationship between inputs and outputs in the short period. According to this law, output can be changed by altering variable factors (such as labour and feed) while keeping other factors (such as land and infrastructure) constant. The law states that with an increase in variable factors, keeping other factors constant, total product initially increases at an increasing rate, then increases at a diminishing rate, and finally starts decreasing.
1. Total Product (TP) - Refers to the total output of the firm per period of time.
1. Example: Total litres of milk produced by a dairy farm per day.

2.1 Introduction
The continuous production of dry milk has become consistently significant within the dairy industry and is expected to continue growing due to its advantageous features. These include improved shelf life, reduced storage
requirements, and lower transportation costs, all of which contribute to favourable economic outcomes.
For example, non-fat dry milk is also known as skim milk powder, dried skim milk, non-fat dry milk solids, or dehydrated skim milk. Similarly, products like dried whole milk, dried cream, and dried buttermilk are often regarded as dried or powdered whole milk, cream, and buttermilk, respectively, based on their specific compositions.
2.2 Types of Dried Powder
1. Nonfat dry milk
2. Dry whole milk
3. Dry buttermilk
4. Dry whey
5. Dry ice cream mix
6. Dry creams (sweet or sour)
7. Dry skim milk vegetable fat products
8. Malted milk Powder
9. Cheese powders (Cheddar, Blue, etc.)
10. Sweetened chocolate flavoured non fat dry milk
11. Coffee creaming products
12. Sodium or Calcium Caseinates
13. Dry high acid milks
14. Partly skim milk powder
15. Infant milk food

Supply is the amount of a good or service sellers are willing to offer for sale at a specific price, in a specific market, over a specific time.
Stock vs. Supply
• Stock: All the milk a farmer has—say, 1,000L in tanks.
• Supply: What he sells—500L at Rs 50/L today. Supply is different from stock, as stock refers to the total quantity of a commodity that exists in the market, while supply is the quantity that is usually offered for sale at a particular price.
Law of Supply
The law of supply explains the functional relationship between the price of a good and its supply. When all other factors remain constant, an increase in price leads to an increase in supply. This means there is a direct proportional relationship between price and supply.
Exceptions
1. Land, rare goods, and labour supply in certain cases do not follow the law of supply.
2. The supply of rare goods cannot be changed with price fluctuations.

1.1 Introduction
Concentrated milks, like evaporated milk and sweetened condensed milk, serve as practical substitutes for fresh milk in regions where access to it is limited or where transportation and storage are challenging. These products go through specific processing techniques to reduce their water content, thereby improving their shelf life and transportability. Evaporated milk is created by removing water through evaporation and then
sterilizing it to prevent microbial growth. This process results in a thicker consistency and a slightly caramelized flavor due to the heat treatment. On the other hand, sweetened condensed milk is made by adding a significant amount of sucrose to the milk and excluding oxygen, which inhibits microbial growth. This results in a thick, sweet product suitable for various culinary uses. These concentrated milk products are usually packaged in small cans, making them convenient for storage and transportation. However, they are sometimes diluted before consumption with water to resemble the taste and consistency of fresh milk. In regions where even concentrated milks are not easily accessible, alternatives like whole milk powder or recombined milk are used. These alternatives involve dehydrating milk into powder form or reconstituting milk components to create a liquid similar to fresh milk. Innovations in processing and packaging have led to the development of alternative uses for concentrated milks, expanding their versatility beyond traditional applications. These products continue to provide essential dairy
nutrition in areas where fresh milk is scarce or hard to obtain, offering a shelfstable solution to meet dietary needs.

Definition of Utility
Utility is the ability of a good or service to satisfy human wants and needs in economics. It is an important concept as it represents the satisfaction experienced by a consumer from consuming a good or service
Utility characteristics
1. Measuring satisfaction, benefit, or happiness from a good or service is difficult.
2. Economists have devised ways to represent and measure utility in terms of economic choices that can be quantified.
3. Total Utility (TU): The aggregate sum of satisfaction or benefit gained from consuming a given amount of goods or services (e.g., drinking three glasses of water provides more satisfaction than just one).
4. Marginal Utility (MU): The additional satisfaction gained from each extra unit of consumption (e.g., the first glass of water gives maximum satisfaction compared to each additional glass).
5. Total utility usually increases as more goods are consumed.
6. Marginal utility typically decreases with each additional unit consumed, demonstrating the Law of Diminishing Marginal Utility.

Definition of Demand
Demand refers to the desire for a commodity that is backed by both purchasing power and willingness to pay at a given price within a specific period. In economics, we consider effective demand—not just absolute desire. A product is in demand only when individuals are willing and able to purchase it.
For example, many farmers may desire to buy cow mats, but if they lack the financial resources or are unwilling to spend on them, it does not count as effective demand.
Demand is formally defined as a “schedule or curve that shows the various quantities of a commodity that consumers are willing and able to purchase at different prices, within a specific time frame and market conditions.”
Law of Demand
The Law of Demand states that, ceteris paribus (all other factors remaining constant), the quantity demanded of a commodity varies inversely with its price. In simpler terms:
When the price of a commodity rises, the quantity demanded decreases. When the price of a commodity falls, the quantity demanded increases. This inverse relationship occurs because consumers tend to buy less of an expensive product and more of a cheaper one, provided other factors like income, preferences, and the price of related goods remain unchanged.

Economics revolves around key concepts such as goods value, price, wealth, income, savings, investment, and consumption. These concepts are interconnected and form the foundation of economic analysis. Below is a detailed explanation of each:
Goods: Definition, Types, and Economic Importance
Definition of Goods
Goods refer to tangible or intangible items that satisfy human wants and have value. Goods can be material (physical objects) or non-material (services), and they play a crucial role in fulfilling human needs and desires. They form the basis of economic activity, as humans constantly seek to fulfil their needs and desires.
Examples
Tangible Goods: You can touch them. Food, clothing, vehicles, dairy products. Intangible Goods (Services): Services you experience. Veterinary services, teaching, medical care.
Classification of Goods in Economics
Goods can be categorized based on different criteria such as material nature, supply, transferability, consumption, ownership, and income elasticity.

Approaches to study subject matter of economics
There are two approaches to study subject matter of economics-
1. Traditional Approach
2. Modern Approach
Economics studies human economic activities, which involve the creation, use, exchange, and distribution of wealth.
1. Traditional Approach
This approach splits economic activities into four interconnected areas:
Consumption, Production, Exchange, and Distribution (CPED).
1. Consumption – Using Goods & Services
Consumption refers to the utilization of goods and services to satisfy human needs and wants. It involves the destruction of utility, meaning that once a good or service is consumed, it cannot be reused in its original form i.e. once used, their original form is gone (utility destroyed) Economics studies the nature of human wants, their characteristics, and how individuals make consumption decisions.

Evolution of Economics as a Discipline
1. Initially, economics was not a separate subject but a part of politics, ethics, and jurisprudence.
2. The study of economic ideas gained prominence through discussions on wealth, trade, and resource management.
3. Adam Smith’s book, An Inquiry into the Nature and Causes of the Wealth of Nations (1776), established economics as a distinct discipline.
4. Due to his contributions, Adam Smith is regarded as the Father of Economics.
Origin of the Term “Economics”
1. The word Economics is derived from the Greek term “Oikonomikos”:
a) Oikos – Household
b) Nomos – Management
2. Originally, Oikonomikos referred to the management of household affairs.

Introduction
Generally, muscles and offals obtained from animals feeding on grass and various other cultivated crops are regarded as meat. Apart from the meat obtained from the cattle, sheep, goat, pig and poultry, in many countries particularly Denmark, Belgium, Holland and Germany, horse meat is also consumed (hippophasia) as normal meat. Kangaroos are slaughtered for meat in Australia whereas capybara a large semi-aquatic vegetarian rodent, is used in South America as of one of the meat source. Dog meat (fragrant) is relished (Kinophasia) in few cultures such as South Korea, China, Vietnam and few north eastern states of India.
In many parts of the world including Indian subcontinent, buffalo meat (Bubalus bubalis), also known as water buffalo or arna, is quite popular owing to its tenderness, leanness and low cholesterol qualities. It is distributed in many countries around the world such as India (largest population), Pakistan, China, Bangladesh, Indonesia, Philippines, Hungary, Italy and France etc. Bison (Bison bison) from North America is also called buffalo but they are separate species of the order Bovidae. Rabbits are also source of meat having higher growth rate and better feed conversion ratio (2:1). Elands are another meat source which are raised in Africa and Russia for meat purpose.
Meat is quite high in protein content but the presence of saturated fat is perceived negatively due to its association in various cardiovascular diseases, diabetes etc. Efforts are made to produce lean meat having higher content of unsaturated fatty acids and to reduce the ω-6 to ω -3 fatty acids ratio.

Introduction
• Arrival of the nerve stimulus at the motor end plate result in reversal of the polarization of the sarcolemmal surfaces and the muscle gets activated
• This causes momentarily loss of potassium and sodium ions impermeability by the sarcolemma and Ca++ ions combined with calsequestrin in the sarcotubular system gets dissociated bringing Ca++ ion equilibrium with the sarcoplasm
• The junctional foot protein (JFP) and the L-type calcium channel (LTC) are the two big protein complexes responsible for the calcium release mechanism (Fig. 10.1)
• This leads to increase in level of Ca++ ion from nearly 0.10 mM to 10 mM
• Thus, troponin C, the calcium-binding site of the troponin complex becomes saturated bringing a structural modification resulting in interaction of actin with the MgATP2- on the H-meromyosin heads of the myosin molecule as the troponin I, the inhibitory protein, no more inhibits this interaction
• The interaction of actin with the MgATP2- intensely activate contractile ATP-ase near the bonding leading to break down of MgATP2- to MgADP– at a greater rate and liberating energy for inward (towards the sarcomere center) pulling of the actin filament
• This leads to breaking of bond between actin and myosin and thus, the myofibrillar part involved in above mentioned activity gets contracted

Pollution emanating from industrial units has become a major problem globally and it is generally monitored by some government agencies. These agencies enforce various laws and regularly carry out checks at the industrial units. Same is true with regards to slaughterhouses or abattoirs. Pollution parameters are parameters against which the effluents coming out of the Effluent Treatment Plant (ETP) of slaughterhouse or any industrial entity is measured against. Effluent generated during various processes of the slaughterhouse is directed towards the ETP and it undergoes different processes to reduce the pollutants level in the effluent. Then, the effluent is tested against the pollution parameters and the effluent must have less than the maximum permissible level of the pollution parameters. The effluent must not have more than the permissible maximum level of the pollutants after coming out of ETP before being discharged into the municipal sewage system or some natural water bodies.
 Pollution parameters are
1. Biochemical oxygen demand (BOD)
2. Chemical oxygen demand (COD)
3. Chloride (Cl)
4. Dry matter (DM) or total solids (TS)
5. Grease, fat and oil
6. pH
7. Total nitrogen (N)
8. Pathogenic bacteria

Introduction
• The source of contamination of meat plant is largely from the animals entering in the plant
• Severely contaminated hide/skin are the major source of abattoir contamination
• If proper hygiene of employees, equipments and clothing is not followed, then even after skinning 10,000 to 100,000 bacteria/ in2 can be detected
• Blades of knives can carry 80,000 to 40 millions bacterial per blade & hands of meat operative can have 3x109 bacteria/g of scrapings
• The chance of contamination of carcase is greater at the point of incision and minimum at the farthest point from the incision place
‘Scotoma effect’ or ‘factory-blindness’
• Persons working in any factory or abattoir on routine basis slowly and slowly becomes unaware (mentally ‘blind’) about any sub-standard hygiene or cleanliness problem existing in the surrounding
• This effect is known as ‘scotoma’ or ‘factory-blindness’
• Effect can be powerful and the any visitors to that factory or abattoir will instantly notice that sub-standard hygiene or cleanliness problem neglected by the persons working there

Physicochemical parameters of meat
1. Moisture, ash and fat content
• Meat samples are dried at 105 °C for 24 h for determining the moisture content and for ash content analysis, samples are burned at 525 °C
• Fat determination is done by acidic hydrolysis of the sample
• Sample is boiled initially and then cooled and later, it is filtered, washed and dried
• Thereafter, petroleum ether is used to extract the fat
• Ether is evaporated and the remnant is dried and weighed
2. Protein content
• Often, protein in meat sample is estimated using Kjeldahl method
• The protein content is determined by multiplying the nitrogen content in the meat sample by an appropriate conversion factor
• Strong acid is used to digest the meat sample and the released nitrogen is measured by proper titration technique
• Then, the protein quantity of the sample is determined from the nitrogen concentration of the meat
• Kjeldahl method does not determine the protein content in straightway manner; a conversion factor (F) is required to convert the nitrogen content to protein content
• Usually, a conversion factor of 6.25 (corresponding to 0.16 g nitrogen/g of protein) is used for several food samples

Introduction
• The main objective of food preservation is to avoid food spoilage • So, the underlying principle behind all the meat preservation technique is providing adverse conditions for the growth and survival of the harmful microbials and such adverse conditions may be provided in the from of heat, cold, high level of salt, increasing acidity or removal of water/ oxygen
• Meat can be preserved by many techniques such as drying, heating, low temperature, curing, addition of chemicals or by application of irradiation and high pressure
• Addition of chemical i.e. chemical preservation which is accomplished by smoking is generally done after salting and pickling of meat
Physical changes in stored raw meat
1. Shrinkage
2. Sweating
3. Bloom loss

Introduction
Storage of fresh meat without microbiological degeneration at temperature more than freezing point of meat is known as ‘conditioning’ or ‘ageing’ and it is said to enhance tenderness and flavor of the meat Conditioning is also known as ageing or proteolysis of meat
• In the initial 24–36 h after the slaughter, glycolysis is the prevailing reaction going on during post-mortem
• The organization of the contractile proteins can only be conserved by the constant supply of ATP (energy source)
• But ATP supply becomes scarce with the passage of time after death and denaturation of the proteins starts
• Denaturation is a physical or intramolecular reorganization without involving hydrolysis of the bonds occurring between the various amino acids of the polypeptide proteins chains
• Denaturation is characterized by heightened reactivity of different chemical groups, a modification in molecules shape or size, reduced solubility and lost biological reactivity in cases of enzymes or hormones
• In the course of post-mortem conditioning, proteins are prone for denaturation due to lower pH than in-vivo, temperatures more than 25 °C or less than 0 °C, dehydration and higher non- hysiological salt levels
• Connective tissue proteins such as collagen and elastin do not undergo denaturation during conditioning

Post-mortem glycolysis (anaerobic glycolysis)
• Post-mortem glycolysis is the basic function of muscle
• Irreversible anaerobic glycolysis starts after the animal has died and oxygen supply to the muscles is cut
• The various biochemical steps that occur in living animals for the conversion of glycogen into lactic acid when the oxygen supply is insufficient, are basically similar in slaughtered animal also
• After slaughter, during anaerobic glycolysis in normal animals (not in the animals that are exhausted, excited or excessively exercised just prior to slaughter), the glycogen reserve of the muscle decreases appreciably resulting in the lactic acid production which will proceed to a pH level at which the enzymes involved in glycolysis become inactivated
• In classic mammalian muscles this pH will be near to 5.4–5.5 (called Ultimate pH)
• Muscle having almost 600 mg glycogen/100 g muscle at the time of slaughter will reach this pH
• A protein called glycogenin is responsible for starting the glycogenesis (glycogen synthesis) in muscle and it binds with eight glucose molecules to produce a glycosyl-protein (Fig. 12.1)
• Glycosyl-protein is used as primer by the enzyme proglycogen synthase and thus, proglycogen is formed
• This proglycogen is converted into bigger macromolecule by the macroglycogen synthase and its branching enzyme

Constituents of meat
i. Water- 75%
ii. Protein- 19%
iii. Soluble and non-protein substances- 3.5%
iv. Fat- 2.5%
• The muscle fibre is important unit of muscular tissue consisting of
a) Myofibrils- formed protein structures embedded in sarcoplasmic fluid
b) Sarcoplasmic reticulum- a fine system of tubules
c) Sarcolemma- a very thin membrane surrounding the myofibrils and around the exterior side of this membrane, the connective tissue is found
• 19% of protein in the muscle is muscle fibre (Table 11.1)
• α-alanine, glycine, glutamic acid and histidine are the major free amino acids present in the fresh muscle

Muscle structure
• All muscles are composed of muscle fibres which are the structural unit of muscles
• In turn, every single muscle fibre is made up of numerous smaller components called myofibrils
• Functional unit of myofibril is sarcomere
Connective tissues associated with muscle
• Whole muscle is surrounded by a sheath of connective tissue called epimysium
• Whole muscle is divided into muscle bundles by perimysium formed out of connective tissue septa originating from the interior surface of the epimysium separating the muscle fibres
• The perimysium contains the blood vessels and nerves