eChapters

Safe Food means

• It is not injurious to health
• It does not contain any filthy, rotten, decomposed or diseased animal
• substance or vegetable substance
• It is produced undermost hygienic conditions to produce/manufacture it, inferior or cheaper ingredients/raw materials are not used
• Food additives/processing aids used are permitted and are within prescribed limits.
• It is not misbranded

1. Introduction

Thermal energy is transferred in the form heat from one body to another through conduction, convection and radiation or in combination of these modes. Some of the examples of heat transfer that occur during various agricultural processing is drying and dehydration, sterilization, pasteurization, evaporation, distillation, to name a few.

The basic equation of conservation of heat can be written as:

Rate of heat in + rate of heat generation= rate of heat out+ rate of accumulation of heat

1. Introduction

Raw milk is an emulsion. It is a mixture of milkfat globules, Solid Not Fat (SNF) and water. Over time, milkfat globule separate out from milk serum and comes to the surface of milk as a layer of cream due to the low density of milkfat or due to heating of milk. When milk is heated rapidly and continuously, some of the water in it evaporates from the surface. This exposes proteins and fat molecules, which bind and dry out and forms a skin like film on the surface. 

1. Introduction

To maintain good quality of product & shelf life, it is very important & essential to concentrate on Cleaning & Sanitization process at plant level & to follow the CIP process properly. An attempt is made in the current chapter to present details pertaining to cleaning in fluid milk and milk products manufacturing & processing plants. This chapter will be helpful the students of Food & Dairy Technology for better understanding the process milk plant cleaning & sanitation technology.

1. Introduction

Drying is a thermo physical and physicochemical process, which involves removal of excess water from a solid, semi-solid or liquid food material by evaporating it into vapour phase on applying heat, to reduce growth of microorganism or to completely eliminate their growth. Hence, reducing the water activity increases shelf life of food products. Drying medium for carrying evaporated moisture can be air or steam. Benefits of drying include increase in shelf life, easy to transport, handle food material and reduce packaging cost as it reduces bulk weight. 

1. Introduction

Thermal processing used extensively in the food industry for preservation and shelf life extension of the products (Arnoldi 2001). Heat treatments remain most important in food processing unit operations, not only to achieve desirable changes in eating quality but also for preservative effect by inactivation of microorganisms, destruction of enzymes and insects.Heat is applied in various unit operations through adifferent mode of heat transfer such as conduction, convection, and radiations. 

2.1. Introduction

The word ‘plastic’ is derived from the Greek word ‘plastikos’, which means easily shaped or molded. Plastics is defined as a random set of materials based on synthetic or modified natural polymers which can be formed by thermal and pressure treatment. It comprises of wide range of macromolecular organic compounds obtained either from alteration of natural macromolecules or polymerization of molecules of lower molecular weight.

Previous Year Questions
1. How has food production, incuding  horticultural crops, changed in  India during the last one decade? Write down its impact on food and nutritional security (20 marks, CSE 2023)
2. What is the food production and consumption pattern of India in the last fifty years? (15M, CSE 2021) 
3. Describe food grain production and consumption trends in India (7.5M, CSE 2019) 
4. Food production and consumption trends in India (12.5M, CSE 2015)

Previous Year Questions

1. Discuss the reasons for food grain surplus (7.5 marks, CSE 2019)

2. What are the reasons for good grain surplus in India? Write the steps taken by the government to save the food grains. (12.5M, CSE 2015)

Reason for Grain Surplus

Green Revolution

• Introduction of high yielding varieties of Rice and Wheat

• Green Revolution was made possible through the use of

Previous Year Questions

1. No questions were asked in past 10 years

Availability of Foodgrains

• Net availability of foodgrains = Gross Production (-) seed, feed & wastage, (-) exports imports (+/-) change in stocks.

Previous Year Questions

1. Differentiate between protective foods and energy foods. (10M, IFoS 2015)

2. What do you mean by ‘hunger’ and ‘hidden hunger’? Comment on various strategies in combating hunger. (15M, CSE 2021)

3. Classify foods on the basis of their function (5M, 2023)

Objective: Development of RTS beverage from seasonal fruits.
Material required
Fruit, juicer-mixer-grinder, preservatives, sugar, refractometer, pan and knife etc.
Principle
Ready To Serve(RTS): This a type of fruit beverage which contain at least 10% fruit juice and 10% total soluble solid besides about 0.3% acid. This is not diluted before serving.
Before undertaking the preparation of beverage, it is necessary to know techniques of extraction of pulp/juice from various fruits used for RTS.

1. Sample: One or more units selected from a population of units, or a portion of material selected from a larger quantity of material
2. The Standard Operating Procedures (SOPs) should contain full working instructions as well as information on applicability, expected performance, internal quality control (performance verification) requirements and calculation of results. It should also contain information on any hazards arising from the method, from standards or from reagents.
3. Analytical Samples: The quantity of the analytical sample to be used is usually indicated in tests and assays. Unless otherwise specified, the quantity used may deviate by 10% from that stated. All quantitative determinations should be conducted on triplicate test portions and in these cases, the amount actually taken should be accurately weighed or measured and the result of the analysis calculated on this exact quantity. When substances are to be “accurately weighed” in a test or assay, the weighing is to be performed in such manner as to limit the error to ± 0.1% or less. Quantities smaller than 100 mg should be weighed to the nearest 0.1 mg.