Food Definition and 290 Threads

I am looking for a good book in English about the human history of food since ancient times. Perhaps at least 10000 years since. I would like to cover geological differences in the biological needs. (Like how Eskimos manage macronutrients from fish). The book should throw light on meal times...

It is true that big animals contain more calories than small animals. However, are the figures for the content of essential nutrients that are not calories different? Such nutrients may be limiting factors and require foraging strategies that would be suboptimal from a simple calory point of...

As we know that microwaves have less energy than visible light , then do we use microwave oven in cooking food instead of visible light?

... in a syfy story that you think would be fun? I was imaging a race of quasi-crabs who entered the Empire of Man after having met only one human, an Oxford don type who gave them some ... interesting ... ideas of what the rest of the human race was like.

simple question, please tell me if my understanding is correctly or not ------------------- our body mass can't come form nothing, it have to come from 'food' we eat. so, If I'm eat 100 gram of food, no matter how high calorie that food is, I never gain weight more than 100 gram. correct...

To grow food in space, I have read about two designs of greenhouse. One is a pressurised greenhouse with wide expanses of thickened glass. The other is indoor stacks of shelves with LEDs driven from solar PVs outside. But would this third design work? Have a rotating mirror to focus light into...

Hello, I have been assigned to write a report on a topic of my choice for my Computational Physics class, and I chose to focus on the symplectic integration of Hamiltonian systems, in particular the Lotka-Volterra model. A 3-species model(\gamma eats \beta, \beta eats \alpha) is not, unlike the...

Hi all We are having a debate regarding peroxide cured EPDM where we a few employees are saying peroxide cured EPDM is food safe and can used as an FDA compliant material; the other group are saying that peroxide curing does not make it food safe. I lean more towards it is because the peroxide...

https://www.sciencedaily.com/releases/2016/09/160905114756.htm For (probably) the first time ever, plants modified with the "genetic scissors" CRISPR-Cas9 has been cultivated, harvested and cooked. D professor in Plant Cell and Molecular Biology served pasta with "CRISPRy" vegetable fry to a...

After reading on the World Health Organization's warning that processed meat is carcinogenic (in humans), even in small daily doses, I went on to investigate if this finding also applies to pets, and found this study: "Twenty-five commercial pet foods were analyzed for mutagenicactivity using...

I've had this question for some time now, and I'd really like to find an answer. What is the best way to peel a hard-boiled egg? I don't consider myself -bad- at peeling eggs. It just seems to be a matter of luck. Sometimes the shell comes off cleanly and easily, and sometimes the eggshell...

I read this in a website "Paramecium has a cavity(gullet) that protrudes outside of the cell surface.The Co-ordinated movement of the rows of cilia causes the water laden with food to be steered into the gullet." Can someone elaborate on that ?

Hello brothers and sisters of different countries, We all know our foods are not without chemicals and other substances that are harmful for our health.We know the major cause is because most of the people in various countries do not have access to knowing what a food item contains and how...

Do you follow the trends of the day in clothing and keeping up with the music of the day, Follow the latest food trends.?

I have decided that today is going to be one of my non birthdays, today my bandages come off so i can have a long luxurious bath with lots of bubbles and smelly stuff, i am going to have some beer and eat Chinese food, walk around in my shorts and watch a film of my chose, i may even smoke a...

Homework Statement Which of the symptoms is characteristic for food allergy bumps (pimple) on the face difficulty in breathing flue none of these Homework EquationsThe Attempt at a Solution I'm between the first and second.

Popcorn aside, whenever I put something in the microwave for only a few seconds longer than I probably should have, it pops. I just watched a rib-bone go flying out of its slab, meat spewing everywhere. Is heat responsible for this action?

Fallout 4 launch is just around the corner. Since I probably won't be leaving the house for a month or so after that, I should stock up on supplies. Preferred food should be keyboard and mouse friendly: food that can be eaten with one hand, without utensils. I already have some stock of pizza...

Homework Statement An "energy bar" contains 22 g of carbohydrates. If the energy bar was his only fuel, how far could a 68 kg person walk at 5 km/h? Mass(person) = 68 kg; v = 5km/h; 22g carb = 4 Cal/1 carb = 88 Cal; P(power of man walking) = 380W (this is derived from my textbook). Homework...

I have just been put on a diet to bring my BMI down, now i am fed up of eating rabbit food, does anyone have some good ideas as to what to eat that is healthy nutritious and tasty.

Previously, I am taking Double Major: Chemistry and Chemical Engineering. I have 60 units before but removed the engineering course so now i have 20 units left. This is because of financial reasons and personally I think in my college, most of the professors in chem engineering department...

What are the different ways to detect harmful chemicals in food? I need to find at least 5 tests for different chemicals for my chemistry investigatory for my final exams. I have only chemicals available in a standard lab in my hand.

I considered posting this in the Food thread, but I think it might be better for it to be in its own separate thread. First of all, let me clarify that I love, LOVE ethnic cuisine and foods that are local to a particular region. I find that I learn a lot about groups of people or the local...

I'm curious, in many flavors used in food (such as vanilla extract and other "natural flavors"), ethanol is used as a solvent to extract the flavors. Is this ethanol synthetic ethanol, or do companies normally get it from the wine/beer industries?

First, thank you for taking the time to read this. I need some guidance as I am inventing somewhat of a new edible product. Curious as to if someone can point me in the right direction for the type of chemist I should actually be looking for. At first I was under the impression that it would be...

I probably have the wrong idea, but we learn by asking I guess. I just microwaved some pizza and while doing so I remembered that microwaves are electromagnetic radiation. I then got to thinking that microwaves work by using a frequency of light that interacts with the water molecules in the...

I was wondering, if ethanol is used in a food, as it commonly is with food flavorings (as a solvent), and that food is then dried out such that It is made into a powder or cereal or something, does all the ethanol completely evaporate? I know ethanol is very volatile and has a low boiling...

I'm concerned that I have food in my body cavities. Are there more than 2 ways down your throat besides your esophagus and windpipe? If so would I be in danger of spoiling in 2 days or so like food poisoning?

Calling all food lovers and connoisseurs of PF . A thread to post anything and everything about food. Share your favourite recipes, your kind of cuisine and favourite dishes, dining experiences, or even your kitchen antics and fiascos. Let the food fest begin and remember, gluttony is not a...

I haven't been there since forever (1976) but next year is the 'big' vacation year. (4 adults and one 9yo child) Most things are easy to decide but we are stuck on one thing. Dining plan or no Dining Plan...

This is a fun, easy and super kid friendly experiment. Now, what exactly is happening here? :) https://www.youtube.com/watch?v=rqQSlEViNpk

Look at this example. I understand the reasoning here, in order to save energy one only needs to boil water slightly. But doesn't it also take longer time to boil it the same amount? I'm pretty sure in a given number of minutes, the spagetti will be more ready (more cooked) if it has been...

Hello, I'm asked to write about the following: "High fructose corn syrup and margarine are two commonly used food ingredients that contribute to both inflammation and obesity." Write one page each on the metabolism of each of these foods in your body, and cite at least one recent paper...

Hello, I would like to understand what exactly is meant by "calories" when we read for example that a chocolate bar has 300 kcal. I understand what is a (kilo)calorie. What I do not know is whether the written values are the raw values in calories or if they are the values our body can...

Hi, I just microwaved some food in a plastic container and noticed that it started to buckle inwards. So I wonder what thermodynamic variables were constant? Obviously not the volume V. The number of particles N was probably approximately constant. What more than N was constant?? What ensemble...

These jalapenos I grew this summer are really coming in handy this winter. Even the pickling liquid is extra hot. They're good in just about anything for adding a great pepper taste and a little heat. http://imagizer.imageshack.us/v2/800x600q90/690/2hpo.jpg

Homework Statement You are going on a long trip in the summer with a dessert that must stay cold. You have a cooler with the interior dimensions measuring 13 in x 8.5in x 11 in. The cooler has 1.75 in of polyurethane foam insulation. The dish is in a water tight container so food getting wet...

Hello All, Does microwave radiation cause change in protein chain structure?

Homework Statement A person cooks a meal in a 30-cm-diameter pot that is covered with a well-fitting lid and let's the food cool to the room temperature of 20°C. The total mass of the food and the pot is 8 kg. Now the person tries to open the pan by lifting the lid up. Assuming no air has...

I made the experiment up myself so my errors may be a result of this, but I heated up marshmallows, eggs and cheese in the microwave and measured the distance between the hotspots in order to get the wavelengths. For the marshmallows I got 0.13cm, for the eggs I got 0.16cm and for the cheese I...

hi everyone . i came across this interesting problem but am not able to figure it out . In a factory that packs food in cans , there is a report that in a particular batch of 400 cans by error a poisonous chemical has been packed instead of food item. Checking 400 cans would be a big loss but...

For quite some time now, I have had a very fundamental question about Nature and how we perceive Her. More specifically, I have had a very fundamental question about the tool we use to investigate Nature. There seems to be only one valid way of understanding how the world works, and that is...

I love watching food shows. Especially historic ones. So I thought I'd share some series that I've watched. Many of these are on HULU, not sure how many are on HULU Plus. Here is a great historical series to get started. http://www.hulu.com/watch/430517 It's The supersizers go...

Hello. I know how to realize an homemade fiber optic using some food jelly. Are there other materials, at amateur grade; to replace jelly ? ( NB this item has to be used in high vacuum, and jelly is not convenient for this use)

I have an interest into looking into the chemistry that goes into making the foods today. I'd like to know what goes into the tastes and smells. So I was wondering if anyone had any suggestions as a good jumping off point for this topic. Any articles or books would be great. I have access to...

Hello. I'm trying to start my own mobile juicing business. I have the money to build my own mobile cart. I spent some time thinking what I want my cart to do. I want to incorporate a mechanical suspension That can lift up the cart for traveling So it can go over steps and curbs (Off road...

Test question: "How many carbohydrates in this food were contributed?" =_= I think my other posts were deleted. So let me post them again with some revisions... 1. 2. Alright... I thought that maybe the percent daily value had something to do with calculating the answer. So on the test...

Homework Statement Having aced your Physics 2111 class, you get a sweet summer-job working in the International Space Station. Your room-mate, Cosmonaut Valdimir tosses a banana at you at a speed of 14.0 m/s. At exactly the same instant, you fling a scoop of ice cream at Valdimir along...

I am wondering if the old saying of having your pyramid of food is valid? Recently I have been discussing with people in the lab whilst waiting around for reactions to occur about nutrition and one guy said the old pyramid thing was a scam. Is he correct in his statement? I have not paid much...

Hi Everyone, First of all, I'm not a scientist ;) But I'm doing some experimentation and just want to confirm if I am on the right track. FDA pickle recipe for non fermented pickles has the following parameters: 50% vinegar 50% water I am using standard commercial 5% distilled...