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Importance of Traditional Foods

Traditional convenience food, or tertiary processed food, is commercially prepared food designed for ease of consumption. Products designated as convenience foods are often prepared food stuffs that can be sold as hot, ready-to-eat dishes; as room-temperature, shelf-stable products; or as refrigerated or frozen products that require minimal preparation (typically just heating).

These products are often sold in portion controlled, single serve packaging designed for portability for “on-the-go” eating. Convenience food can include products such as candy; beverages such as soft drinks, juices and milk; fast food; nuts, fruits and vegetables in fresh or preserved states; processed meats and cheeses; and canned products such as soups and pasta dishes.

Traditional Foods

Preparation of Vadagam and Appalam

Vadagam is a traditional product mostly prepared from rice flour and also sago. It is an deep fat fried product and consumed as a side dish in the meals. Papad also known as appalam or papadam in South India, is essentially a thin wafer like product, usually circular in shape rolled from a dough made out of pulse, cereals, edible vegetable oil, alkaline and mucilaginous additives. It is normally consumed in toasted or fried form. In India, papad has been associated and deeply entwined with social customs/ rituals and has been developed into culinary art.

Introduction

In the ancient era, adulteration was practiced as economical fraud like the addition of water to milk and stone to grains and pulses but nowadays it has become a global concern due to adverse health effects of adulterants on a human being. Words like substitution and admixture can help define adulteration. In general, adulteration is defined as either removal of valuable constituents from food or intentionally/ unintentionally addition of substandard quality material to degrade food quality. Food adulteration not only negatively affects the quality of food products but also results in numerous adverse health effects along with significant economic problems (Cheng et al., 2015).

1. Introduction

Law of conservation of mass says that material cannot be created nor destroyed, which is the basic fundamentals of physical science. Many engineering analyses involve material balances. These balances are simply accounting processes that account for all material in processes of interest. The material balance is one of the most useful tools fundamental in the “engineering approach” to design new process. The law of conservation of mass tells that the total mass of all material entering any process must equal the total mass of materials leaving plus the mass of any material accumulated in the process.

Introduction
The term canning refers to a process in which the food is heated in hermetically sealed containers at a specific temperature for a specific time to eliminate microbial pathogens that endanger public health; and microorganisms & enzymes that deteriorate food during storage. The credit for the invention of canning goes to a French confectioner Francois Nicholas Appert, who was awarded a prize in 1809 by the French government for developing a new method of heat preservation of food in a sealed container and after whose name the process of canning has also been named as Appertization. In 1810 Nicholas Appert published the first book on canning entitled “The Art of Preserving Animal and Vegetable Substances for Many Years.” which is the first known work on canning. The work of Appert consists of packing food in glass bottles, closing them with corks, and heating the container in boiling water for several minutes depending upon the type of the food. Although the developed technique was used to preserve different types of food, the actual reason for the prevention of spoilage was known only after the work of Louis Pasteur (1864) who discovered that food spoilage was caused by microorganisms that were destroyed at elevated temperatures and the technique was known as Pasteurization. This understanding helped to form a scientific basis for establishing and revolutionizing the canning industry. Canning of fruits on a commercial scale was introduced in the USA in 1817 by William Underwood. The old phrase ‘necessity is the mother of invention’ suits well for the development of the canning industry during wars. The Civil War in America and the Great European War of 1914 also gave impetus to the development of a canning industry to meet enormous requirements of food for the fighting forces.

Introduction
Fruit juice and beverages comprise naturally extracted juices, drinks, ready to serve (RTS) beverages, carbonated juice drinks, nectars, squashes, cordials and appetizers, etc. These products are highly refreshing, thirst-quenching, appetizing and nutritionally superior to many synthetic and aerated drinks. Fruit juice is the natural liquid expressed from the edible portion of the fruit. Fruit juices are generally extracted from fruits in several ways, depending on their structure and composition. Soft fruits such as berries or tomatoes can be pressed in a fruit press or pulped by using a juicer attachment to a food processor. Citrus fruits are usually reamed to extract the clear juice. Harder fruits, such as pineapple, are peeled, pulped and pressed to extract the juice. Apple and pear fruits are crushed in a fruit grater and pressed in a hydraulic/ basket press to extract a clear juice. Passion fruit juice is prepared by using a pulper-finisher that separates the skin and seeds from the pulp. The fruits like mango, guava, apricot, peach etc from which the clear juice extraction is difficult are passed through the pulper to make pulp and then the pulp is utilized for preparation of juice, fruit drinks and ready to serve beverages. The composition of juice is unaltered during preparation and preservation while for fruit beverages like drinks, squashes, cordial etc the fruit juice or pulp, sugar, acid, colour, flavour etc are mixed in appropriate proportions to a desirable taste. Apple juice, orange juice, mango squash, guava drink, pineapple juice and squash, mixed fruit drink, mango nectar etc are the commercial products available in the market.

Introduction and Relevance
UHT processing of milk was developed to produce a shelf-stable product with minimal chemical changes as encountered with sterilized milk. Aseptically packaged UHT milk can have a shelf life of 06 to 12 months and does not need to be stored in a refrigerator. Its role in the market varies by region. In countries like the India, USA and Canada, where UHT milk occupies a smaller segment of the liquid milk market, it is often used as a backup option, reserved for situations when pasteurized milk is unavailable. Conversely, in regions such as Europe, (particularly France, Belgium, Spain and Germany), Asia, (China, Japan, Thailand and Vietnam) Latin America and (Brazil) in UHT milk is the dominant form of milk available and is consumed regularly. In markets where it is a backup option, UHT milk requires long-term stability of 6–12 months, while in regions where it is used daily, a shorter shelf life of three months or less is often sufficient.
Ultra-High Temperature (UHT) treatment involves heating milk to very high temperatures, typically between 130°C and 150°C, for a brief period of few seconds. This process results in commercially sterile milk, meaning that while not all bacteria are destroyed, those capable of growing under ambient storage conditions are effectively eliminated. An essential component of UHT processing is aseptic packaging, where the sterilized milk is filled into presterilized containers in a sterile environment. This combination ensures that the milk remains free from contamination and maintains its extended shelf life without requiring refrigeration.
Standards for UHT processing vary globally. In the European Union, a minimum temperature of 135°C with an appropriate holding time is mandated. In the United States, the standard for ultra-pasteurization is 280°F (137.8°C) for 2 seconds. Many international standards recommend 135°C for at least 1 second, though some countries do not specify minimum conditions. However, this level of treatment is often regarded as insufficient for completely destroying the spores of spoilage organisms, highlighting the importance of precise temperature-time combinations and the critical role of aseptic packaging in ensuring product safety and stability.

Introduction

The act of substituting food or drink with low grade quality ingredients thereby the f inal product will fail to the meet the regulation or standards and in most cases even unfit for human consumption (Augustin et al., 2009). With demand for profit based manufacturing market, there will be increase in points of adulteration with cheaper alternatives or inferior grade ingredients in the production of food or drink (Banti, 2020)]. Adulteration is highly prevails in developing countries such as India, where about 70% of milk supply is adulterated on day to day basis (Bittar et al., 2017). It is every nation and each individual’s responsibility to provide safe and nutritious food to the consumers.

Introduction
Drying is probably the oldest method of food preservation used for agricultural crops, including food grains, oilseeds, spices, as well as fruit and vegetables. Drying refers to the removal of moisture content from the food to a level at which the activities of food spoilage micro-organisms are inhibited. Therefore, the reduction in water activity of the food as a result of moisture removal is themain principle of preservation by drying. Two commonly used terms for dried foods include low-moisture foods and intermediate moisture foods (IMF). Dried foods or low-moisture foods generally do not contain more than 25% moisture and have a water activity (aw) in the range of 0 to 0.6. Intermediate moisture (IMF) foods on the other hand contain 15- 50% moisture with a water activity (aw) of 0.60 -0.85. Dried grapes (raisins and munacca), apricots, dates, Morchella (Guchhi), bael, chilli, figs, etc. are commercial products prepared by using drying. However, the temperature used for drying is usually insufficient to cause the killing of microorganisms and enzymes, therefore any increase in moisture content during storage due to faulty packaging can also spoil the product. Thus, greater care is required for the packaging and storage of dried products.

1. Introduction

Mixing is a fundamental and widely practiced operation in many fields, such as chemical, pharmaceutical, and food processing industries. The mixture’s primary aim is to increase the homogeneity of the material in bulk (Uhl and Gray, 1986; Patterson et al., 2004). Mixing means the random distribution of two or more ingredients throughout a system, which differs from the term’ agitation,’ which is defined as establishing a particular flow pattern with the liquid, especially in a circulatory motion within a container. Mixing is a necessary step in the context of food processing operations. 

An efficient management of animals will be incomplete without a well planned and adequate housing of animals. Improper planning of animal housing leads to additional labor charges. The housing should have proper sanitation, durability, arrangements for the production of clean milk under convenient and economic conditions.

a) General Housing Requirements

Dairy animals will be more efficient in the production of milk and in reproduction if they are protected from extreme heat, and particularly from direct sunshine. This can be achieved through provision of shade in tropical and subtropical climates. If dairy animals are confined, the area should be free of mud and manure in order to reduce hoof infection to a minimum. Concrete floors or pavements are ideal where the area per animal is limited. However, where ample space is available, an earth yard, properly sloped for good drainage is adequate.

Introduction

Spices are botanical products of tropical and subtropical plants, mainly fruits, seeds, f lowers, roots, stems, leaves, bark, or whole plant (Golob & Nations, 1999). The dominant spices of trade including cardamom, cinnamon, cloves, ginger and pepper (A. Osman et al., 2019)including aroma, flavor, and color, to foods and beverages in an effort to enhance their palatability. Herbs and spices exhibit a plethora of medicinal properties including antimicrobial and antioxidant properties. Spices serve as natural preservatives to delay food spoilage and extend shelf life.

Introduction

The dairy farmers mostly keep cows (indigenous and crossbred) along with few buffaloes for milk production. However, the genetic potential of the dairy animals is exploited fully, when they are fed with well balanced ration. Further, as feed cost is around 75% of the total cost of production, the success of the dairy farming depends not only on the quality of the ration, but also on the economy of the ration. Therefore, knowledge on the feeds and feeding of dairy animals is highly essential.

What is Feed?

Feed may be defined as supplementation of nutrients for development, maintenance and operation of day to day activities by animals.

Fraudulent substitution of meat is the adulteration or mixing of the inferior or cheaper quality meat into superior quality meat. The first case of fraudulent substitution was recorded in thirteenth century A.D. at Florence in Italy. A common fraud in the meat industry in which uninspected meat is substituted for meat that has undergone inspection and been branded as satisfactory. The other frauds are the substitution of meat of another species, e.g. horse for beef especially in Britain and Ireland, beef in kangaroo meat in Australia, cat for chicken or rabbit, goat meat for mutton, mutton for venison, dog meat and cat meat for chevon in other countries including India. As per an estimate about 25-30% of meat sold in India is adulterated. These practices are more common in comminuted meat products. These illegal practices are punishable under PFA act 1955. The choice of method to be applied is depend on the need or condition of meat recovered.

Milk: Composition, Nutritional Role, & Importance for Human Health Introduction
Milk is one of nature’s most complete and balanced foods, offering a rich source of essential nutrients such as proteins, fats, carbohydrates, vitamins, and minerals in forms that are easily digested and assimilated by the body. It serves as a cornerstone of human nutrition, providing critical support for growth, bone strength, and overall health. Known as the nectar of life, milk not only sustains life but also enhances immunity, forming the first bond between mother and infant.
An adequate intake of calcium, particularly during childhood, is critical for bone development and preventing osteoporosis in later life. Rich in calcium, phosphorus, and vitamin D, milk is vital for maintaining strong bones and teeth while preventing osteoporosis. Its high-quality proteins support muscle growthand recovery, while lactose and fats provide both immediate and sustained energy. Micronutrients like zinc, selenium, and whey proteins strengthen the immune system, and its high water content makes milk an excellent source of hydration. These qualities make it a protective food for all age groups, from infants to the elderly.
While milk naturally lacks iron and has low levels of vitamin D, fortification with additional nutrients enhances its nutritional profile, making it even more beneficial. Fortified milk helps address deficiencies, supports bone health, and boosts immunity, making it an ideal dietary option for diverse populations. For infants and children, milk is a near-perfect food, and for adults, it serves as an excellent dietary supplement, particularly for its calcium, protein, and vitamin content. Beyond its nutritional benefits, milk plays a significant role in culinary traditions and cultural practices across the globe.

Introduction

Food fraud is not new it can be traced back to ancient Rome and Athens, where regulations prohibiting the adulteration of beverages with flavours and colours were in place. It exists since the food trade has been started. Food fraud affects all food supply chains, thus the entire food sector. Due to globalisation and the increasing complexity of supply lines, food supply chains are becoming more vulnerable to food fraud (Robson et al., 2021a). A fraud is “any act or omission relating to the use or presentation of false, incorrect, or incomplete statements or documents, or non disclosure of information in violation of a specific obligation, and any other illegal activity affecting the financial interests” (EU No. 2017/1371).

Physico-chemical and microbiological quality of meat and aquatic food and food products gives its overall safety and quality status as a food. The physico-chemical and microbiological qualities of raw material have great importance on the product development. It also affects the shelf life of the raw material as well as final product.

Fresh meat is a type of meat which has not been subjected to any processing whereas raw meat is a fresh meat which has undergone freezing. The qualities of fresh meat are important as far as merchandiser, purchaser and consumers are concerned and it is also important for adaptability in further processing. The important quality parameters of fresh meat are:

Wheat (Triticum aestivum L.) is one of the major cereal consumed globally in various form as food. The powder of wheat flour is prepared by grinding of wheat seeds. Soft wheat flour has low gluten content that causes its crumbly texture. However, hard wheat flour has high gluten content of about 12-14% and has elastic toughness due to which it has good shape once its baked. Wheat flour is a basic ingredient in India’s famous flatbreads, and it can also be a key ingredient in addressing major health concerns in India.

A variety of glassware like burettes, pipettes, measuring cylinders, flasks, separating funnel etc. are used for experimental purposes in a laboratory. All of these need to be used and handled correctly, otherwise the chances of experimental error and damage to the glassware increase significantly. Being made of glass, they need special care while washing and using in experiments because even a minor mistake in handling of glassware may result in breakage of the apparatus. With this precautionary note, let us discuss about some of the specific glassware used in the laboratories.

Burette

Burette is a long graduated glass tube with a stopcock at one end for delivering a known/desired volume of a liquid, especially in titration experiments. It contains a stopcock at the lower end and a tapered capillary tube as the stopcock’s outlet. The flow rate of liquid from the tub stopcock’s outlet can be controlled with the help of stopcock valve. Burette is used for measuring the volume of a solution/chemical added in a quantitative (titrimetric) estimation experiment.

Procedure of using a Burette

The burette reading must be noted before and after delivering the chemical/ solution from the burette. The difference in these two readings is the volume of the chemical/solution released out of the burette. The solution should be released slowly/drop-by-drop to avoid any experimental error/mistake. If the solution/chemical is allowed to pour out too fast, the wall of the burette will not drain properly and some liquid may remain sticking to the surface of the walls. Moreover, excessive amount of chemical may be released/dropped during the experiment, particularly during the titration experiment wherein we need to know the exact amount of acid/base needed to get neutralization point. Thus, any minor mistake may lead to get a faulty reading. The measuring capacity of a burette usually used in a laboratory is 50 mL.

Food processing sector in India has largest segment of bakery with more than 1.3 million tonnes of production from organized sector and 1.7 million tons from 1,000,000 unorganized sectors. India is second largest producer of biscuits globally. Our bakery industry is positioned third in generation of revenues among processed food sector.

Fº value: It is used to express F-value when z =10ºC / 18ºF and the temperature is 121.1ºC. It is the number of minutes at a specific temperature (250ºC) required to destroy or kill a stated number of microorganisms and has specific z-value. It is also called reference value.