Vitamin

A vitamin is an organic compound required as a nutrient in tiny amounts by an organism. A compound is called a vitamin when it cannot be synthesized in sufficient quantities by an organism, and must be obtained from the diet. Thus, the term is conditional both on the circumstances and the particular organism. For example, ascorbic acid functions asvitamin C for some animals but not others, and vitamins D and K are required in the human diet only in certain circumstances. The term vitamin does not include other essential nutrients such as dietary minerals, essential fatty acids, or essential amino acids, nor does it encompass the large number of other nutrients that promote health but are otherwise required less often.

Vitamins are classified by their biological and chemical activity, not their structure. Thus, each "vitamin" may refer to several vitamer compounds that all show the biological activity associated with a particular vitamin. Such a set of chemicals are grouped under an alphabetized vitamin "generic descriptor" title, such as "vitamin A," which includes the compounds retinal, retinol, and many carotenoids. Vitamers are often inter-converted in the body.

Vitamins have diverse biochemical functions, including function as hormones (e.g. vitamin D), antioxidants (e.g. vitamin E), and mediators of cell signaling and regulators of cell and tissue growth and differentiation (e.g. vitamin A). The largest number of vitamins (e.g. B complex vitamins) function as precursors for enzyme cofactor bio-molecules (coenzymes), that help act as catalysts and substrates in metabolism. When acting as part of a catalyst, vitamins are bound to enzymesand are called prosthetic groups. For example, biotin is part of enzymes involved in making fatty acids. Vitamins also act as coenzymes to carry chemical groups between enzymes. For example, folic acid carries various forms of carbon group – methyl, formyl and methylene - in the cell. Although these roles in assisting enzyme reactions are vitamins' best-known function, the other vitamin functions are equally important.

Until the 1900s, vitamins were obtained solely through food intake, and changes in diet (which, for example, could occur during a particular growing season) can alter the types and amounts of vitamins ingested. Vitamins have been produced as commodity chemicals and made widely available as inexpensive pills for several decades, allowing supplementation of the dietary intake.

Manipulation in medicine

The immune response can be manipulated to suppress unwanted responses resulting from autoimmunity, allergy, and transplant rejection, and to stimulate protective responses against pathogens that largely elude the immune system (see immunization). Immunosuppressive drugs are used to control autoimmune disorders or inflammation when excessive tissue damage occurs, and to prevent transplant rejection after an organ transplant.

Anti-inflammatory drugs are often used to control the effects of inflammation. The glucocorticoids are the most powerful of these drugs; however, these drugs can have many undesirable side effects (e.g., central obesity, hyperglycemia, osteoporosis) and their use must be tightly controlled.Therefore, lower doses of anti-inflammatory drugs are often used in conjunction with cytotoxic or immunosuppressive drugs such as methotrexate orazathioprine. Cytotoxic drugs inhibit the immune response by killing dividing cells such as activated T cells. However, the killing is indiscriminate and other constantly dividing cells and their organs are affected, which causes toxic side effects. Immunosuppressive drugs such as cyclosporinprevent T cells from responding to signals correctly by inhibiting signal transduction pathways.

Larger drugs (>500 Da) can provoke a neutralizing immune response, particularly if the drugs are administered repeatedly, or in larger doses. This limits the effectiveness of drugs based on larger peptides and proteins (which are typically larger than 6000 Da). In some cases, the drug itself is not immunogenic, but may be co-administered with an immunogenic compound, as is sometimes the case for Taxol. Computational methods have been developed to predict the immunogenicity of peptides and proteins, which are particularly useful in designing therapeutic antibodies, assessing likely virulence of mutations in viral coat particles, and validation of proposed peptide-based drug treatments. Early techniques relied mainly on the observation that hydrophilic amino acids are overrepresented in epitope regions than hydrophobic amino acids; however, more recent developments rely on machine learning techniques using databases of existing known epitopes, usually on well-studied virus proteins, as a training set. A publicly accessible database has been established for the cataloguing of epitopes from pathogens known to be recognizable by B cells. The emerging field of bioinformatics-based studies of immunogenicity is referred to as immunoinformatics.

Immune system

An immune system is a collection of biological processes within an organism that protects against disease by identifying and killingpathogens and tumour cells. It detects a wide variety of agents, from viruses to parasitic worms, and needs to distinguish them from the organism's own healthy cells and tissues in order to function properly. Detection is complicated as pathogens can evolve rapidly, producingadaptations that avoid the immune system and allow the pathogens to successfully infect their hosts.

To survive this challenge, multiple mechanisms evolved that recognize and neutralize pathogens. Even simple unicellular organisms such asbacteria possess enzyme systems that protect against viral infections. Other basic immune mechanisms evolved in ancient eukaryotes and remain in their modern descendants, such as plants, fish, reptiles, and insects. These mechanisms include antimicrobial peptides calleddefensins, phagocytosis, and the complement system. Vertebrates such as humans have even more sophisticated defense mechanisms.^[1]The immune systems of vertebrates consist of many types of proteins, cells, organs, and tissues, which interact in an elaborate and dynamic network. As part of this more complex immune response, the human immune system adapts over time to recognise specific pathogens more efficiently. This adaptation process is referred to as "adaptive immunity" or "acquired immunity" and creates immunological memory. Immunological memory created from a primary response to a specific pathogen, provides an enhanced response to secondary encounters with that same, specific pathogen. This process of acquired immunity is the basis of vaccination.

Disorders in the immune system can result in disease. Immunodeficiency diseases occur when the immune system is less active than normal, resulting in recurring and life-threatening infections. Immunodeficiency can either be the result of a genetic disease, such as severe combined immunodeficiency, or be produced by pharmaceuticals or an infection, such as the acquired immune deficiency syndrome (AIDS) that is caused by the retrovirus HIV. In contrast, autoimmune diseases result from a hyperactive immune system attacking normal tissues as if they were foreign organisms. Common autoimmune diseases include rheumatoid arthritis, diabetes mellitus type 1 and lupus erythematosus. Immunology covers the study of all aspects of the immune system which has significant relevance to human health and diseases. Further investigation in this field is expected to play a serious role in promotion of health and treatment of diseases.

Aspects of health

Physical health

Physical fitness refers to good body health, and is the result of regular exercise, proper diet and nutrition, and proper rest for physical recovery.

A strong indicator of the health of localized population is their height or weight, which generally increases with improved nutrition and health care. This is also influenced by the standard of living and quality of life. Genetics also plays a major role in people's height. The study of human growth, its regulators, and implications is known as Auxology.

Mental healthMental health refers to an individual's emotional and psychological well-being. "A state of emotional and psychological well-being in which an individual is able to use his or her cognitive and emotional capabilities, function in society, and meet the ordinary demands of everyday life."

One way to think about mental health is by looking at how effectively and successfully a person functions. Feeling capable and competent; being able to handle normal levels of stress, maintain satisfying relationships, and lead an independent life; and being able to "bounce back," or recover from difficult situations, are all signs of mental health.

EIGHT PROBLEM SOLVING STRATEGIES.

1. WORK BACKWARDS

To solve some problems, you may need to undo the key actions in the problem. This strategy is called Work Backward.

Working backwards is a standard strategy that only seems to have restricted use. However, it’s a powerful tool when it can be used. In the kind of problems we will be using in this web-site, it will be most often of value when we are looking at games. It frequently turns out to be worth looking at what happens at the end of a game and then work backward to the beginning, in order to see what moves are best.

2. GUESS AND CHECK

Some problems cannot be solved directly. You need to use a strategy called Guess and Check.

Guess and check is one of the simplest strategies. Anyone can guess an answer. If they can also check that the guess fits the conditions of the problem, then they have mastered guess and check. This is a strategy that would certainly work on the Farmyard problem but it could take a lot of time and a lot of computation.

Guess and improve is slightly more sophisticated than guess and check. The idea is that you use your first incorrect guess to make an improved next guess. You can see it in action in the Farmyard problem. In relatively straightforward problems like that, it is often fairly easy to see how to improve the last guess. In some problems though, where there are more variables, it may not be clear at first which way to change the guessing.

3. LOOK FOR A PATTERN

In many ways looking for patterns is what mathematics is all about. We want to know how things are connected and how things work and this is made easier if we can find patterns. Patterns make things easier because they tell us how a group of objects acts in the same way. Once we see a pattern we have much more control over what we are doing.

4. DRAW A PICTURE

It is fairly clear that a picture has to be used in the strategy Draw a Picture. But the picture need not be too elaborate. It should only contain enough detail to solve the problem. Hence a rough circle with two marks is quite sufficient for chickens and a blob plus four marks will do for pigs. There is no need for elaborate drawings showing beak, feathers, curly tails, etc., in full colour. Children should be encouraged to use this strategy at some point because it helps children ‘see’ the problem and it can develop into quite a sophisticated strategy later.

5. MAKE A TABLE

There are a number of ways of using Make a Table. These range from tables of numbers to help solve problems like the Farmyard, to the sort of tables with ticks and crosses that are often used in logic problems. Tables can also be an efficient way of finding number patterns.

6. MAKE A LIST

Making Organised Lists and Tables are two aspects of working systematically. Most children start off recording their problem solving efforts in a very haphazard way. Often there is a little calculation or whatever in this corner, and another one over there, and another one just here. It helps children to bring a logical and systematic development to their mathematics if they begin to organize things systematically as they go. This even applies to their explorations.

When an Organised List is being used, it should be arranged in such a way that there is some natural order implicit in its construction. For example, shopping lists are generally not organised. They usually grow haphazardly as you think of each item. A little thought might make them organised. Putting all the meat together, all the vegetables together, and all the drinks together, could do this for you. Even more organisation could be forced by putting all the meat items in alphabetical order, and so on.

7. ACT IT OUT

Meaning that two strategies combine together because they are closely related.

Young children especially, enjoy using Act it Out. Children themselves take the role of things in the problem. In the FARMYARD problem, the children might take the role of the animals though it is unlikely that you would have 87 children in your class. But if there are not enough children you might be able to press gang the odd teddy or two.

There are pros and cons for this strategy. It is an effective strategy for demonstration purposes in front of the whole class. On the other hand, it can also be cumbersome when used by groups, especially if a largish number of students are involved. We have, however, found it a useful strategy when students have had trouble coming to grips with a problem.

The on-looking children may be more interested in acting it out because other children are involved. Sometimes, though, the children acting out the problem may get less out of the exercise than the children watching. This is because the participants are so engrossed in the mechanics of what they are doing that they don’t see through to the underlying mathematics. However, because these children are concentrating on what they are doing, they may in fact get more out of it and remember it longer than the others, so there are pros and cons here.

8. USING SYMMETRY

It helps us to reduce the difficulty level of a problem. Playing Noughts and crosses, for instance, you will have realized that there are three and not nine ways to put the first symbol down. This immediately reduces the number of possibilities for the game and makes it easier to analyze. This sort of argument comes up all the time and should be grabbed with glee when you see it.

How to keep fit the easy way and how to quit smoking.

Nowadays, with urbanization, economic development and changing lifestyles and diets, excess weight and obesity have become increasingly common in Asia. Today, there are plenty of weights reducing method out there. But how far does it works obviously hard to tell. For some cases it has been found that the period immediately following a diet can be a most frustrating time of trying to keep the lost weight off, in many cases all the weight and sometimes even more is gained back. Sedentary lifestyle, poor eating habits, eating out culture, weekend savor indulge culture had been become part of our lifestyle in the society. Other factors that have contributed to the epidemic of overweight include:

• Highly processed foods
• Lack of exercise
• Stress environment
• Drinking
• The decline in smoking
• The Health Consequences

Overweight encourages high blood pressure, high cholesterol, heart disease, diabetes, and a variety of other diseases.

First step to keep fit are eat eating a variety of foods from the six food groups, and choose a diet low in fat. Drink more water or mineral water. Keep water in a bottle and bring at all times like go to work, school or during exercise. Then, drink water about eight times per day although you not thirsty. Don’t drink alcohol, carbonated water, high caffeine water and polluted water.

Before eat or drink, think carefully about what to eat or drink. Make sure that the food in good condition, healthy and will provide you good nutrition. You will not take food based on your appetite. Most important in your foods are the nutrition, not the taste or color of the foods. Eat a balance meal. Eat more vegetable, fruit and milk. take minimum amount of sugar, snack and sweet.

If your diet or not take a balance meals, please take a vitamin supplements for recovery your diet and keep health your body. Don’t save your money to buy supplements because money cannot buy health. Consume sugar and alcohol in moderation.

Doing exercise and sports at least three times per week. Focus your exercise and maintains. Choose suitable exercise for your own body ability. For better result, do exercise with your family or friends. It becomes easy and more fun. Alternate your workout routines throughout the course of the week to work different muscle groups. If you feel boring when doing exercise, taking up a new form of exercising or using think that keep you motivated like buy a new sports shoe or track suit. You will feel fresher and spirits to doing exercise because have a new sports shoe.

If you have extra money, you can register with health club membership; buy fitness equipment and a personal trainer. When you have fitness equipment at home, you can exercise every time at home as you like. You didn’t need to go out to find fitness equipment.

Nowadays, many people like to compare their body with other people. They was influenced with artist or actress and want to be like their. Don’t compare like that. Please became yourself and be grateful because your body still health.

Create your exercise schedule for motivate and discipline your exercise time. Try to follow the schedule. Lastly, get adequate amounts of your sleep. Your body needs rest after working one day.

Many people try to quit two or three times before they give up smoking for good. Nicotine is a very addictive drug. To quit smoking, pick a date to stop smoking. Before that day, get rid of all cigarettes and lighter everywhere you smoke. Do not allow anyone to smoke in your home.

Get support from your family, friends and coworkers. Studies have shown you will be more likely to quit if you have help. Let the people important to you know the date you will be quitting and ask them for their support. Ask them not to smoke around you or leave cigarettes out.

Find substitutes for smoking and vary your routine. When you get the urge to smoke, do something to take your mind off smoking. Talk to a friends, go for a walk, or go to the movies. Reduce stress with exercise, meditation, hot baths or reading. Try sugar-free gum or candy to help handle your cravings. Drink a lot of water and juices.

Talk to your doctor or nurse about medicines to help you quit. Some people have withdrawal symptoms when they quit smoking. These symptoms can include depression, trouble sleeping and trouble thinking. Most medicines help you quit smoking by giving you small, steady doses of nicotine, the drug in cigarettes that causes addition. Talk to your doctor or nurse to see if one of these medicines may be right for you.

Be prepared for relapse. Most people relapse, or start smoking again, within the first three months after quitting. Don’t get discourage if you relapse. Remember, many people try to quit several times before quitting for good. Think of what helped and didn’t help the last time you tried to quit. Figuring these out before you try to quit again will increase your chances for success.

Immune System Vitamins - Boost Your Immune System With Vitamin Supplements By Andrew Stratton

It's that time of year again: cold and flu season! There are many helpful ways you can avoid catching unwanted bugs like getting your annual flu shot, washing your hands often, and avoiding contact with others that are sick. In addition to these steps, you must make a special effort to care. It is your immune system that identifies and destroys the harmful bacteria and viruses that so often make you miserably sick.

A healthy immune system will sometimes destroy unwanted intruders even before you experience symptoms. You can keep your immune system healthy and protect yourself from misery by making sure you are getting enough sleep, staying adequately hydrated, and eating a balanced diet But because your life is hectic and no one eats perfectly, taking vitamins and dietary supplements are great ways to ensure that your immune system is working at its fullest potential.

But what supplements do you take to help boost your immune system against the common cold and flu? The following vitamins and dietary supplements are thought to help the immune system fight unwanted germs at faster rate making and ease their accompanying symptoms.

Vitamins A, C, and E

A good source for vitamins A, C, and E are foods such as dark green leafy vegetables, especially cabbage relatives like broccoli and kale and orange vegetables like carrots. It is best to get any vitamins directly from food because they are more effectively absorbed by the body, but supplements in pill form can also be taken.

People taking vitamins A, C, and E showed to have healthier T cells, which are antigen presenting immune system cells. This is helpful in fighting off viruses and bacteria like those that cause the common cold but taking these supplements may even have long term effects. These three vitamins are also thought to be cancer preventing.

Zinc

Zinc is a mineral that is also necessary to keep the immune system healthy and running smoothly. Many cold remedies contain Zinc and when taken soon after the onset of the cold, help reduce the symptoms. Zinc is often sold as an ingredient in lozenges that may help sooth a sore throat.

Echineacea

This herb can be taken in a dietary supplement and is thought to prevent or shorten the length of the common cold. It is the flower part of the Echinacea purpura plant that offers the most benefits.

Probiotics

Probiotics are good bacteria that keep your digestive tract regulated and show some benefits when it comes to your immune system. The most popular source of probiotics is yogurt. Eating food containing probiotics is helpful in reducing the symptoms and duration of the common cold.

It is important to remember taking these dietary supplements and vitamins is not insurance against the common cold and flu. When you provide your body with these supplements along with proper amounts of sleep, water intake, and sanitation, you are ensuring that your immune system is working at its fullest potential. This means you are less likely to suffer from such ailments than if your body was not receiving such vitamins, minerals, and herbs.

Protect yourself during cold and flu season. Immune system vitamins can help you ensure a good healthy immune system that identifies and destroys harmful bacteria and viruses. For high-quality supplements that promote optimal health, visit http://www.goodelements.com