Nutrition and Dietetics - Food Tech Notes

Jul 23

Non Thermal Preservation of Food – Oscillating Magnetic Field (OMF)

Oscillating magnetic field (OMF) is generated with electromagnet of alternating current. The intensity varies periodically according to frequency and type of wave in the magnet. OMF is applied in the form of constant amplitude or decaying amplitude sinusoidal wave. The magnetic field may be homogenous or heterogeneous. In homogenous field, field intensity (B) is uniform in the area enclosed by the magnetic field coil. In heterogeneous field, field intensity (B) is non – uniform with the intensities decreasing as distances from the center of the coil increases. Read more

Jul 19

Important Nutritional Considerations in Different Stages of Life

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To develop their optimal potential it is vital that children are provided with nutritionally sound diet. Diet and exercise pattern during childhood and adolescence may spell the difference between health and risk of disease in later years. Different stages of life cycle dictates different nutrients needs.
Important nutritional considerations in first stage of life:
In first 12 months of life a baby will triple its weight and increase its length 50 %. These gain in weight and height are the primary indices of nutritional status and their accurate measure at regular intervals are compared with standard growth charts. These measurements are important tools for monitoring a child’s progress particularly during the first 6 to 12 months of life. Read more

Jul 18

Healthy Eating Habits for Adults

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Healthy eating and healthful way of life are important to how we look, feel and how much we enjoy life. The right lifestyle decisions with good food and good regular exercise can help us make the most of what life has to offer. Making smart food choices early in life and through adulthood can also help reduce risk of obesity, hypertension, diabetes, certain cancers and osteoporosis. Following are the healthy eating habits for adults.
1. Enjoy wide variety of food: This concept it is the most consistent health message in dietary recommendations around the world. We need more than 40 different nutrients for good health and no single food can supply them all. That is why consumption of a wide variety of foods (including fruits, vegetables, cereal grains, meat, fish, poultry, dairy products, fats and oil) is necessary for good health and any food can be enjoyed as part of a healthy diet. Some studies have linked dietary variety with longevity. In any event, choosing a variety of foods adds to the enjoyment of meals and snacks. Read more

Jul 18

Healthy Eating Habits for Children and Adolescents

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1. Enjoy your food: try to enjoy lots of different food every day for variety and enjoyment. Share food with family and friends.
2. Breakfast is very important meal: your body needs energy after long sleep so breakfast is important. Food that are high in carbohydrate such as bread, cereals, fruits make good breakfast choices. Skipping meals especially breakfast can lead to out of control hunger, often resulting in helpless over eating. Skipping breakfast can also cause lack of concentration for school-work.
3. Eat lots of different food: a variety of different food every day is the secret for good health. You need 40 different vitamins and minerals for good health and no one food can supply all of them. There are no ‘good’ or ‘bad’ food so you don’t need to miss the food you enjoy.
4. Base your food choices on carbohydrate: these food provide needed energy, vitamins and minerals. Food that are high in carbohydrate include pasta, breads, cereals, fruits and vegetables. Try to include some of these food in every meal as more than half of the calories in your diet should come from them. Read more

Jul 16

Sieve Analysis

Sieving is a unit operation in which mixture of various sizes of solid particle is separated into two or more fractions by passing over screen. It is applied in industry to determine shape and size of any samples. Sieve analysis has two main objectives.
a. To find out shape of material
b. To find out size of material
In general, there are two types of sieves.
1. Wire woven sieve
2. Perforated sieve

Jul 13

Conveying and Handling: Application in Food Industries

Conveying is the method of transferring materials from one place to another generally by mechanical means. The use of conveying process are generally in all stages of manufacturing process including harvest and transportation of raw materials to store, preparation of food, movement of food or produce within the factory and movement of finished product to warehouse. It can also be used for presentation of products for selling. Efficient handling is the organized movement of materials in correct quantities to and from correct place accomplished with minimum time, labor, waste, expenditure and with maximum safety. Read more

Jul 03

Vitamins: Functions and their sources

Vitamin refer to essential dietary factor which is required by an organism in small amounts and whose absence results in deficiency diseases. Vitamins are important for their regularity and protective functions. Unlike most other nutrients, they are required in very small amounts. But it is necessary to provide these in diet because many of them cannot be synthesized in our body. Excess intake of any vitamin however is harmful. Vitamins are generally classified on the basis of their solubility.

Water soluble vitamin: vitamin C, B complex
Fat soluble vitamin: vitamin A, D, E and K