How food manufacturer will measure how much calorie is there in the food?
536153
i believe the thing they used is called a calorometer. it involves burning the food and measuring the amount of energy that is released during combustion.
275753
Calories are energy, essentially. In fact, they're also a unit of measure of energy. \n\nThe human body only needs a certain amount of calories to carry out life processes and fuel the body. When you consume in excess, the calories are stored as fat and other unhealthy compounds.
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Energy comes in a variety of forms: light, heat, motion, electricity, and so forth. The energy in food is measured in units of Calories. A Calorie is defined as the quantity of heat it takes to raise the temperature of 1 kg of water 1 degree Celsius. The energy in food is defined in terms of heat because the quantity measured is heat produced upon burning the food. Burning in the presence of oxygen is the process of combustion. Complete combustion results in the production of energy as well as carbon dioxide and water. Look for evidence of these products during your discovery session.\n\n\nFood often is labeled with the number of available Calories per gram of food. In this discovery session, you will measure the amount of energy in Calories in two types of nuts: peanuts and almonds. The accepted values for these nuts are listed in many Calorie-counting and diet books (5.18 Cal/gram for peanuts and 5.47 Cal/gram for almonds). This energy is converted into a usable form by chemical reactions in the human body. Therefore, the number of equivalent Calories of food that you eat gives an indication of the amount of energy you will have at your disposal.\n\nQUESTION: How are calories measured? \n\n\n\nANSWER: The caloric value of food is the energy produced by combustion of its proteins, carbohydrates and fats. The amount of energy liberated by the catabolism of food in the body is almost the same as the amount liberated when food is burnt outside the body. The energy liberated by catabolic processes is used for maintaining body functions namely digestion, thermoregulation, muscular contraction and nerve impulses conduction. The amount of energy liberated / unit time is the metabolic rate. When food is burnt outside the body, all the energy is liberated as heat. \n\nThe standard unit of heat energy is the calorie (cal), which is defined as the amount of heat energy necessary to raise the temperature of 1 ml of water by one degree, from 15 to 16 celsius at rest. \n\nA slightly different calorie is used in engineering, the international calorie, which equals 1/860 international watt-hour (4.1868 J). A large calorie, or kilocalorie, usually referred to simply as a calorie and sometimes as a kilogram calorie, equals 1,000 calories and is the unit used to express the energy-producing value of food in the calculation of diets. \n\nThe energy released by combustion of foodstuffs outside the body can be measured directly and indirectly. In direct calorimetry method the liberated energy can be measured using a bomb calorimeter. It is a metal vessel surrounded by a water insulated container. The food is ignited by an electric spark. The change in the temperature of water is a measure of the calories produced. \n\nIn indirect method, the energy production can also be calculated by measuring the amount of oxygen consumed for combustion of food. The amount of oxygen consumed / unit of time is proportionate to the energy liberated. This method of energy estimation is called wet combustion. The caloric value of carbohydrate is 4.1 Kcal /g, protein is 5.65 Kcal/ g and fat is 9.4 Kcal/g.
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Check out the methods section of this article: http://freenet.macatawa.org/~rimmer/Vitamin.htm\n\nThere are different methods to measure the content of different nutrients.  One of the most common methods is NIR spectroscopy.  And then there are chemical analyses and preparation techniques to isolate certain nutrients. In short, big time biochemistry going on!
1010157
The food sample is broken down into its basic constituents and each of them is then tested in a bomb calorimeter.
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There are 9 cal/gm of fat or 9000 per kilogram.  Similarly if we are dealing with carbohydrate or protein then there are 4 calories per gram or 4000 per kilogram.
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goto http://www.nal.usda.gov/fnic/foodcomp/cgi-bin/measure.pl?MSRE_NO=11134xyzxyzCassava%2C%20rawxyz
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This is GREAT! .\nNutritionData (ND)  \nGenerates nutrition facts labels and provides simplified nutritional analyses for all foods and recipes.\nCategory: Food Calorie Counters\nhttp://www.nutritiondata.com\n\nIt may not be what your friend uses, so you should ask your friend
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go to this link and you'll learn all about calories.  understanding how they work also provides a good knowledge on common sense ways to burn them.\n\nhttp://home.howstuffworks.com/calorie.htm
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Look for the //**** for my comments\n\n\n----------------------------------------------------------------\n//Ch5Lab3.cpp - calculates and displays a food's fat \n//*****line below wasn't commented out\n//calories and fat percentage\n//Created/revised by TED KIM on JUNE FIFTENTH\n\n#include <iostream>\n//#include <cstdlib>\n \n//****using namespace std; -> saves you from having to use std:: notation\nusing namespace std;\n\n//using std::cout;\n//using std::cin;\n//using std::endl;\n\n//inserted main() instead of main90\nint main(void)\n{\nint totalCal      = 0;\nint fatGrams      = 0;\nint fatcal        = 0;\ndouble fatPercent = 0.0;\n\n//enter input data\ncout << "Enter the total calories: ";\ncin >> totalCal;\ncout << "Enter the grams of fat: ";\ncin >> fatGrams;\n\n//validate input data\nif (totalCal < 0 || fatGrams < 0){\n//**********inserted endl instead if end\ncout << "Input error" << endl;\n        }\nelse\n{\n//valid data - calculate fat calories and fat percentage\nfatcal = fatGrams * 9;\n\n//******inserted fatcal instead of fatCal\nfatPercent = double(fatcal) / double(totalCal) *100.0;\n//******inserted fatcal instead of fatCal\ncout << "Fat calories: " << fatcal << endl;\ncout << "Fat percentage : " << fatPercent << endl;\n}//end if\n\nreturn 0;\n}//end of main function\n------------------------------------------------------------------
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I'm not sure but this site will help find calories for a target weight.\nhttp://www.caloriecontrol.org/calcalcs.html
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This will vary from body to body and can be influenced by your height, weight, exercise level, fitness level,  how often you eat, exactly what you eat, and a number of other things.    The best way for you to find out would be for you to go to a gym or doctor's office and have them do some sort of metabolic test to figure out approximately how many calories you burn, then come up with some sort of diet and exercise program from there.
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Calories is the unit to measure heat, where as Fat in terms of Chemistry is long chain molecules of fatty acids due to which Fat is solid at lower temperatures. \nIn common language calories is used to tell the amount of heat we can get from a specific food, and fat is the extra calories which are stored in body.
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Try here:\n\nhttp://www.food.gov.uk/multimedia/webpage/98016
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go to sparkpeople.com \nit has food guidelines, plus weight loss tracker, you can even enter all the foods you eat and it will count the calories. Also some excercise tips and will give you a tailored exercise plan. All free too...good luck
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I like http://www.calorielab.com\n\nJust type in the food you are seeking calorie count for and you'll get more info than you imagined...lol!
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The number of calories *is* the total number of calories.  Calories only come from protein, fat, or carbs.  So listing the "calories from fat" is just telling you the fat calories.  If you add up the number of calories from protein, fat, and carbs, you should get the total number of calories- the number on the label after "calories."\n\nPcal + Fcal + Ccal = Total Calories.\n\nSo yes, that first calorie reading is what is contributing to your total calorie intake.  The rest just tell you what the calories consist of.