Energy content is an important property of food. The energy your body needs for running, talking, and thinking comes from the food you eat. For this project I conducted an experiment on different kinds of nuts in which I aimed to determine how much energy were stored in these nuts. The experiment was executed by burning these nuts to heat up a container of water and calculating the change in temperature that takes place. Using the change in temperature, one could calculate the amount of energy set free by the burning nuts.
My hypothesis for this project will be:
“Is there a variance in energy contained in food based on the general size, weight, origin and texture? “.
Research was also conducted on the energy in food and what factors influence this energy.
TABLE OF CONTENTS
1 INTRODUCTION 8
1.1 BACKGROUND 8
1.2 OBJECTIVES OF THE STUDY 8
1.3 SCOPE OF THE STUDY 8
1.4 METHODOLOGY 8
2 FOOD AND ENERGY 9
2.1 INTRODUCTION 9
2.2 ENERGY 9
2.3 BIOENERGETICS 9
2.4 FOOD ENERGY 10
2.4.1 NUTS 10
2.4.1.1 Effects of Roasting 10
3 FIELD OBSERVATIONS 11
3.1 EXPERIMENT AND METHOD 11
3.1.1 BACKGROUND 11
3.1.1.1 Units 11
3.1.2 APPARATUS AND REQUIREMENTS 12
3.1.3 METHOD 12
3.2 DATA AND CALCULATIONS 13
3.3 RESULTS 14
3.3.1 SIZE AND WEIGHT 14
3.3.2 TEXTURE 15
3.3.3 ORIGIN 15
4 CONCLUSION 16
LIST OF TABLES
TABLE 1 - TABLE OF RESULTS 12
TABLE 2 – CLASSIFIATION OF TEXTURES 14
TABLE 3 – AVERAGE ENERGY IN NUTS 14
TABLE 4 – CULTIVATION OF NUTS 14
LIST OF FIGURES AND GRAPHS
FIGURE 1 – HOME-MADE CALORIMETER 11
GRAPH 1 – GRAPH OF WEIGHT AND ENERGY OF NUTS 13
LIST OF SYMBOLS
∆ : DELTA – ‘CHANGE IN’
1 INTRODUCTION
1.1 Background
The energy that the human body and brain needs to function ...
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...re various factors that have an influence on the amount of energy that food store within them. Some factors have a greater influence on this amount than others. Through the research it was found that the biggest influence on the weight of food is energy containing substances like carbohydrates, fatty oils and proteins. This is in good correlation with the experiment results, showing that the weight of the substance had a great influence on the amount of energy contained in food.
In the hypothesis, it was stated that it will be tested whether texture would have an influence on the amount of energy in nuts. The experiment was inconclusive in terms of the energy and the texture of nuts. Since there is not sufficient evidence that texture in nuts has an influence on the amount of energy contained, it is not possible to make a conclusion in terms of any food.
In the experiment, 0.436 Calories per gram were found when dividing the average heat per mass of food by 1000. The standard deviation proved that this number can either be moved up 0.082 Cal/g or down. This is nowhere near the 3.2 Calories per gram which appeared on the label
type of energy is lost or gained, and whether or not a factor that is
Calories are a measurement for energy and are often measured as the heat energy absorbed from the digestion of foods (“Calories.”). Calories seen in labels of food are not measured in heat energy, but as estimated comparison of energy density (Atkins). Despite that calories are used as measurements of the energy in food, it is not the only thing t...
In an article titled “Energy Digestibility of Giant Pandas on Bamboo-Only and on Supplemented Diets”, the goal of this study was to figure out the energy digestibility of bamboo by giant pandas using digestibility trials and through analysis using bomb calorimetry. An energy budget is a numerical statement that measures the amount of energy collected and the placement of the energy to various functions. Energy budgets can be described using the equation: E=M+P+U+F (where E is the total amount of energy consumed, M is the energy used for maintenance and activity, P is the energy used for production (which includes growth and reproduction), U is the energy lost in urine, and F is the energy lost in feces.). The total energy consumed minus the energy lost in feces is the digestible energy and shows the ability of the digestive system to process consumed food.
The energy return ratio (as food energy per fossil energy expended) of the most energy efficient factory farming of meat is 34.5%, while that of the least energy efficient plant food is 328%. Fossil energy is utilized from before a cow is raised until it is eaten. This account for the necessary energy to clear land from its original vegetation, to grow cow feed, to operate slaughterhouses and transportation. Forty pounds of soybeans are produced by the same amount of fossil fuels required to produce one pound of meat. All these factors indicate the inverse relationship between meat production and fossil energy savings.
...ensity and Energy Costs." The American Journal of Clinical Nutrition 79.1 (2004): 6-16. Web. 22 Oct. 2013.
When something gives us energy, it means more than to just give us the required power to work or move along for such a specific task. In biological terms, it means to have your energy be transported through your body and placed by cells into biomolecules. Biomolecules such as lipids and carbohydrates. It then stores that energy in our body.
David Robson unites chocolate lovers and ecologists alike with his article asking if junk food is better than healthy food for the environment. He researches the carbon footprint for the production of one hundred calories of food. He doesn’t include any macromolecules in his research, his research is aimed purely at measuring the ratio between carbon dioxide production and calories. Regrettably he reminds readers that this is not an excuse for a root canal, but a thought to keep in the back of our minds when we consider a well-balanced diet (Robson, David). The general field of study his article best represents is Ecology. It relates to the information covered in the textbook and this course through metabolism and ecosystems.
For years, I have been eating what I want. Food choices are a significant factor that affects our health. What we like or crave, often, is the determining variable in what we eat. Finding the right balance of food choices is the key factor in improving our health benefits. Choosing nutrient-dense foods will provide more nutritional value than foods that are found to be low in nutrient density. Making the right choices in foods, however, is extremely difficult. Often, I find myself enthralled in the latest fad, not considering the subtext of the foods I am eating, such as nutrients, vitamins, healthy fats and unhealthy fats, cholesterol and minerals. The diet project underlined a three-day food entry intake that provided a dietary analysis report
In LK Mahan et al., eds., Krause's Food and the Nutrition Care Process, 13th ed., pp.
Food has been a common source of necessity in our everyday lives as humans. It helps gives us nutrition and energy to live throughout our life. Over several decades, the development of making foods has evolved. They have changed from natural to processed foods in recent years. Nowadays natural ingredients are barely used in the making of foods like bread, cheese, or yogurt. The food industry today has replaced natural food making with inorganic ingredients. The cause of this switch is due to processed foods being easier, cheaper and faster to make. Artificial nutrition and processed foods have been proven to last longer in market shelves then natural foods. Also, due to artificial additives in processed foods they help satisfy consumers taste more than natural ingredients. The method of producing processed foods is common in today's food industry and helps make money faster and efficiently for companies. Examples of this can be found in all markets that distribute food. Even though processed foods may be easier and faster to make, they are nowhere near as healthy for consumers compared to natural foods. Natural foods are healthier, wholesome, and beneficial to the human body and planet then processed foods.
The reason I chose this particular area of research is that peanut butter is an extremely popular food choice worldwide as it is affordable and nutritious; and I also love to eat it. However, the number of brands and the choices within the brand range make it complicated for the consumer and myself to choose the most nutritious option. Prior to this research I did not understand the nutritional content of the food I ate.
human bodies. All these changes in the food are what people refer to as food
Food has been known as an unavoidable component of life which makes it a basic necessity. There are two main types of foods:healthy food and fast food. Although they have some similarities ,there are a lot of differences between them. Healthy foods provoke energy and decrease the risk of so many diseases. On the contrary, fast foods are high in sugar and fat, which may lead to many health issues like heart and liver diseases. They both can be tasty and have several varieties to choose . On the other hand,there are two main differences between the two types. The first one is related to health . The second one is related to cost.
Proper nutrition is one of the most essential elements to being healthy and living a long life. People deal with food every day, and food has been a part of life since the beginning of civilization. What we eat becomes our diet, and our diet plays a major role in deciding how healthy we are and how well our body functions. Without proper diet, our body cannot carry out the functions it needs to perform. Most people have some common knowledge on what is good and what is bad for the human body to consume. Fruits, vegetables, nuts, and grains are some common items people think of when they think of healthy foods. However, it is not enough just to know what foods are good for your body, it is also important to understand why certain foods are good for you and what they do to help the body function.