The first thing that you need to think about is what you actually would like to do in your future. If you know what you want to do at University, then you need to be thinking about where you might like to study. If you have a look around the websites of some institutions, you will find that there are certain subjects which are required for the course that you want to do. It is much better to find out about this kind of thing now than it is to leave it until the last minute when there might not be very much that you can do about your options. Some Universities also have a list of the subjects which are not acceptable to them, and this is important if you would like to go to any of these places, as you would then know which of the subjects you should really be avoiding. 

Then, you need to think about the subjects that would go well together. If you do three science subjects for example, then you might be limiting yourself with regards to the things that you could do in later life. If you know now that you want to do a science at University then this if fine, but you don’t really want to be limiting yourself too soon if you can help it. 

Ideally, you would do maths, a science, and English, and then another subject which would show that you have some variety. There are a lot of things that you can do at A Level that you have never been able to do before, and you might find that you are able to find things that you would really enjoy in these options. Things such as film studies might interest you, and would give you the chance to think about doing something that you may never have believed would appeal to you at all. You also need to be picking things that you enjoy doing, as you have to spend a lot of time and effort doing work on these subjects, so you don’t want to be choosing things that you’re going to be bored of within the first week. Your A Levels will be hard work, but if choose subjects that you enjoy, you will find that these two years could very well be the most interesting of your education so far, and could lead you to do things that you could only have dreamed about in the past. 

It is recommended that we drink eight glasses of water per day, but a lot of people don’t even manage to get a quarter of this. If we are dehydrated, our bodies will try and hold on to every bit of water that it can get, which means that we might not lose weight. Although we will be losing fat, this is going to be masked by the fact that our body is retaining water, so we wouldn’t be able to tell that we were losing the weight. If we drink a lot of water, then our body is never going to get to the stage where it feels as though it has to cling on to water in order to survive. In addition to this, drinking more water can make our skin healthier, our hair and nails healthier, and can give us a lot of energy that we might not have experienced in the past.

With regards to how we drink the water, then this is relatively simple. You should make sure that you have at least one glass of water with each of your meals. A lot of people don’t bother to drink while they’re eating, and this can be very bad for them in the long term. It doesn’t have to be pure water, either. A cup of tea in the morning would count for example, as would a drink of fruit juice at lunch time. If you can, try to make sure that the drink that you choose has no added sugar, as this would defeat the object of drinking more water in the first place. As well as the water that you drink with your meals, you need to make sure that you drink between your meals as well. You should see if you can drink at least two 500ml bottles of water per day as well as the drinks with your meals. This means that you should have enough water to be able to see you through the course of the day, and you should start to feel the benefits of this soon. Not only does it keep you hydrated, but it also tricks your body into thinking that it’s getting some food, and this means that you’re less likely to feel hungry between meals.

The water that is in your food counts as well, so if you eat lots of fruit and veg then you can be sure that you’re getting extra hydration from that as well. Drinking more water is quite possibly one of the best things that you’re ever going to start doing, so never underestimate just how powerful a natural substance can be. 

Luckily, thanks to a fantastic new invention, there is something available to you which will solve both of these problems at the same time.

One of the things that people say to me all of the time is that they don’t have the time to exercise, because they’re too busy doing housework, or because there was something that they wanted to watch on the television. I always suggest that they get an exercise bike, and their answer is usually that they cannot afford to do this because of the current economy and the fact that energy bills are higher now than they have ever been in the past.

This solution is a small adaptor that attaches itself to your bike, without you needing to remove either of the wheels, and uses the energy that you create to power things around your house. You don’t even have to use the energy there and then; you can store enough energy in a power pack which is supplied with the bike to be able to charge your laptop for around eight hours. This can be achieved by just one hour’s cycling. Although other things can be plugged in, the more energy they use, the more likely it is that you are going to run out unless you do a lot of cycling. However, this device is fully recommended for doing things like charging up laptops and mobile phones; particularly overnight when you would want to charge all of the mobile phones in your household at the same time.

This also provides excellent energy for you. You could decide for example that you want to provide enough energy so that you never had to plug your laptop or your phone into the mains again, and this would mean that you might have to do a couple of hours per day. It doesn’t just have to be you; everyone in your family could have a go, and you could have different things plugged into the adaptor during the course of the day. Although it costs a couple of hundred pounds to begin with, I am of the opinion that this thing would pay for itself within a couple of months if you used it properly, because you probably don’t realise just how much energy each of the smaller appliances in your house actually use up. 

For the majority of patients, the suitable option is the EEG, which is non invasive. This has a lot of advantages, because it doesn’t cost too much money, it doesn’t cause the patient to be in pain, and it doesn’t interfere with an individual’s ability to move as you might find with other types of brain scanning. The EEG measures voltage difference on the scalp in the microvolt range. Because it is able to do this, this means that it can give excellent information about when a neural process is happening, as the current is recorded with millisecond resolution. This is a great advantage over other types of brain scanning which can only show where something is taking place and not when. This means that individuals can be shown photographs or other things and then their brain activity can be measured alongside this. Therefore, we can get information about exactly what might be happening inside of the brain when a photo is shown to a particular person.

One of the disadvantages of brain scanning is that, because you need a lot of neurons to “fire” at the same time in order to record a signal, it is hard to guess exactly which part of the brain the signal is coming from. There are millions of neurons in the brain and this means that any one signal could have come from an infinite number of sources. However, providing that we are knowledgable about the structure of the brain and the head, we can quite easily predict how a current will propagate and be obseved if it is coming from a particular area.

When neurons fire, they can become locked in synchrony, which means that a lot of them fire at the same time. It is this syncrony that provides us with moments of consciousness that encompass our entire lives. If it were not for these neurons working together, we would not really be “alive” at all. In patients with schizophrenia, these patterns are slightly out of sync to a normal working brain, and this is why those individuals might experience different patterns of thought to the average member of the population. 

However, there are some costs of humans having a large brain. Because our brain uses 20% of the calories that we consume in an average day, this means that we have to have a highly nutritious diet which can often be hard to find. In addition to this we have painful and dangerous childbirth and a long period of infant dependancy on the parents, which means that once we decide to have a child, we have to remain loyal to that decision for a great number of years.

If you want to measure theory of mind in children, you would use something called the false belief task, which you should be able to find using a quick internet search. It is thought that theory of mind develops around the age of 3-5 years old, so you could use this test to see if your child was developing at the pace that they were supposed to be. It is impaired in autism, so this might be one of the earliest indicators that you can look out for. 

In adults, you can use the “mind in the eyes” task by somebody called Baron-Cohen. This is a task in which you have to look at some photos of people’s eyes and then try to guess the emotion that they were conveying at the time that the photo was taken. If you score lower than 20 out of 36 on this task then you may show tendencies towards autism yourself. It is often found that women would score more highly in this task than men because they do actually tend to be more socially intelligent. Interestingly, over eight times as many men are autistic than women, and this statistic would certainly suppot the theory that women are more socially intelligent. 

So, why is it important to have a social brain? Well, if you think about long into the past, when human beings were only just evolving, you can see that there were a lot of pressures on them before they were able to survive. They had to find food, and they had to make sure that they were able to look after their family. If they couldn’t do this then they wouldn’t be able to survive, so this means that they would benefit from being able to guess what other people were thinking and feeling, as they would be able to work out what their intentions were.

If the social brain had not developed, it is unlikely that our species would have survived at all. 

Beginning are in a sense a window on ones ending as T. S. Eliot pointed out. Could this have been his understanding of our mortality being already determined from day one? Scientists studying aging have long observed that normal cells grow until a certain point whereas cancer cells continue to grow even when a cultural medium is packed with cells. This lack of cell surface recognition by a neighboring cell has been paralleled to a time warp, those cells do not age the way regular cells do, they continue to proliferate.The limit of growth is  perhaps an analogy to the beginning of ones end.

J.F. Kennedy added that at one in the country’s history it we stood on the edge of a new frontier. “we stand on the edge of a new frontier became synonymous with the thought of further space explorations and discoveries that were just starting for the US. We would then be focused on determining whether life could be sustained on neighbouring planets or their moons. The statement can also allude to the fact that the major powers that be then began to look at space from which to defend their ideologies and interests.

Fermentation is the process by which bacteria, yeasts and moulds convert sugars and carbohydrates into less complex products such as carbon dioxide and alcohol. Bacteria send enzymes out through their cell walls into the food and these break them down into particles that can be absorbed by the body’s cells through osmosis.

Fermentation is one of the oldest methods of preserving food. For example, making cheese is a good way of preserving milk. Wine is an excellent means for preserving grapes. Kim chi is a perfect vehicle for preserving and enhancing the flavour of the humble cabbage.

Kim Chi – Korea’s spicy pickled cabbage

A fundamental factor underpinning the fermentation process is the creation of an acidic environment. Many harmful organisms cannot exist in an acidic solution and so die.

Different Kinds of Fermentation

Lactic acid Fermentation: Some bacteria are particularly fond of carbohydrates found in dairy products and can rapidly convert them into lactic acid. As the acid levels increase, harmful bacteria are killed off. Fermented food from milk includes cheese, yogurt and curd. 

Kefir from fermented milk; source

Lactic acid bacteria are also fond of carbohydrates found in flour, grain, dairy products and vegetables to produce an acidic environment that is both suitable for the preservation of the food and for changing the nature of the flavour of the food.

Thus, lactic acid bacteria are responsible for the highly desirable sour taste in sourdough bread. Bacteria added to chopped cabbage produces the acidic environment required for the creation of sauerkraut in Europe, kim chee in Korea. A similar process is used for cucumber pickles in the United States, khalpi and gundruk in Nepal, hum choy in China and torshi khiar in Egypt.

Yeast fermentation: Yeasts are members of the fungi family. They are single-celled organisms that reproduce asexually. They are used in the production of bread, beer, cider and wine.

Yeasts release enzymes on search and destroy missions aimed at sugars. The enzymes induce, and control the rate of the chemical reactions necessary to break down sugars to produce alcohol and carbon dioxide under anaerobic conditions.

Yeast + carbohydrate or sugar —> CO2 + alcohol

If oxygen is present, then aerobic fermentation occurs and the result will be the production of carbon dioxide and water, not alcohol.

The reaction you get is:

Sugar + Oxygen —> CO2 + Water

If you produce alcohol by anaerobic fermentation, it must remain sealed from the air, otherwise the resulting bacteria will digest the ethanol in the presence of the oxygen and acetic acid (CH3COOH) will be the by-product. This brings us to the third type of fermentation explained in the next section.

Fermented Drinks: Wine is made when yeast consumes the natural sugars in fruit such as grapes, and beer is made when yeast consumes the sugar derived from grain.

The naturally occurring starch found in grain must be converted into sugar before yeast can consume it. This is done by ‘malting’ the grains (usually barley) by soaking  in water long enough to begin germination. This releases enzymes which break down starches to sugars. The grain is then heated in a large kiln, which arrests germination and stops the growth of the grain.

In the brewery, the malt is crushed with purified water (’mashed’) and then the liquid (’wort’) is extracted from this. The wort is boiled with hops under carefully-controlled conditions.

Hop vine; Source

Hops are a source of carbohydrate in beer, and it acts as a preservative agent, adds flavor, and also balances the sweet taste of the malt. Once the hops have flavoured the brew, they are removed.

Acetic Acid Fermentation

Certain bacteria work on fruits, ciders and wine to produce vinegars of all types. Vinegar production involves both bacterial and yeast fermentation. The yeasts start the process and produce ethyl alcohol and carbon dioxide. The bacteria then take over and, in the presence of air (hence oxygen) turn the alcohol into the required acetic acid.
So the chemical process for vinegar production is:

C6H12O6 + Yeast —> 2CO2 + 2C2H5OH
C2H5OH + O2 + Acetobacter —> H2O + CH3COOH

Mould fermentation

Moulds generally do not assist with the fermentation of fruit or vegetables. They are better with dairy products.

Moulds, do however, impart characteristic flavours and produce enzymes such as amylase for bread making.
Moulds from the penicillium genus help ripen and flavour cheese, for example: Stilton, Roquefort and Gorgonzola

Advantages of Fermentation

• Cheap Means of Food Preservation: Sudan is probably the hottest and driest country in Africa. People here have developed products that can be preserved for years through the double action of fermentation itself (which produces anti-microbial acids) and sun-drying. Dried and fermented foods together with the seeds and fruits that can be gathered from the wild have saved lives in times of shortage.

• Use of Waste Products: In Indonesia a variety of waste products are fermented to produce nutritious food products, and these have come in handy during famine days. Tempe-bongrek is a protein rich food made by fermenting peanut and coconut press-cake, remaining after oil extraction. Ontjom is produced from waste groundnut press cake and tapioca waste. Fresh coconut residue, left over from the production of coconut cream or milk, is fermented by Bacillus subtilis, to produce semayi, which is widely consumed in Indonesia.

  In Latin America, pineapple peels that would otherwise be discarded are fermented for about 8 days to produce pineapple peel vinegar.

  In Nepal, Gundruk is produced by shredding the leaves of mustard, radish and cauliflower leaves and placing them in an earthenware pot to ferment. After five to seven days the leaves are removed and dried in the sun. Gundruk is a very important food product in Nepal ensuring food security for many Nepali communities especially in remote areas.

• Flavor: Apart  from preserving food, fermentation intensifies the flavour through the conversion of sugars into acids. Fermenting makes grains more digestible. Fermented products often contain higher levels of vitamins (particularly thiamine, nicotinic acid, biotin and riboflavin) and proteins.

• Reduce Toxicity in Certain Foods: Fermentation processes encourage the presence of bacteria to break down inedible or harmful food products and render them safe for consumption.One example cited by FAO is that of Cassava which is widely eaten in Africa, and has semi-dangerous levels of cyanide.
  
  Fermenting Cassava; Source

The lactic acid bacteria turn the cyanide compounds into cyanic gases which then escape from the fermenting food, thus rendering it harmless.

• Improved Nutrition: One of the important outcomes of food fermentation is the enrichment of food with essential amino acids, vitamins, mineral and bioactive compounds. For example, thiamine and riboflavin increase during fermentation of idli, the fermented rice and black-gram popular in India and Sri Lanka.

  Fermented food contain high concentrations of pro-biotic, beneficial micro-organisms that contribute to a healthy immune system. They are rich in antioxidants too, which account for their use in the treatment of tuberculosis, high cholesterol and cancer.

Read Also

The Science of Brining and The Health Benefit of Pickles

Benefits of Probiotic Food

The Science of Pickling

All foods are continually assaulted by many kinds of microorganisms. When you put vegetables in brine for pickling, the water inside the vegetables flows out into the brine, making the pickles crunchier. The passage of water is by a process called osmosis.

Osmosis is the movement of water molecules through a selectively-permeable membrane – in this case, the membrane of the plant or vegetable cells. Water will move from an area of high solute (salt) concentration to an area of low solute concentration. In this case, the salt solution has a lower water concentration than the water inside fresh vegetables, so water will flow out of the vegetables. This process goes on until an equilibrium is achieved.

The following figure shows a similar effect when sugar solution of varying concentration is separated by a semi-permeable membrane.

Source

When cucumber is immersed in a brine solution, the water leaves the cucumber in a brine solution and becomes shriveled, owing to osmosis. Later, another process called diffusion causes the salt molecules to diffuse back into the cucumber, and this is what gives the pickle its salty flavor.

Diffusion is the movement of solutes, like salts or dissolved sugars, from an area of high solute concentration to an area of low solute concentration. Diffusion is behind the marination of a food product.

Brining or pickling preserves food from micro-organisms. At a certain optimum salt concentration, lactic acid bacteria grow more quickly than other microbes. As lactic acid bacteria grow in the pickle jar, they digest sugars in the cucumbers and produce lactic acid that controls the spread of spoilage microbes. Also, by gobbling up the sugars, lactic acid bacteria remove a potential food source for bad bacteria. Thus, the spoilage-causing microorganisms do not survive, leaving lactic acid bacteria to colonize your cucumbers.

During fermentation, it’s important to keep your pickle jar covered to seal out the air. That’s because oxygen encourages the spread of spoilage microbes. Any exposed pickle or brine becomes a breeding ground for the bad microbes, which can spread to spoil the entire batch.

Benefits of Pickles

Active cultures and enzymes found in pickles support proper digestion and aid nutrient absorption. The primary by-product of the fermentation of pickled vegetable is Lactic Acid, and this stimulates cell metabolism, supports the growth of essential intestinal flora, normalizes acid levels in the stomach, helps the body to assimilate proteins and iron, and inhibits harmful microbes in the intestinal system.

The fermentation is also found to increase the bioavailability of nutrients by reducing the effect of certain naturally occurring anti-nutritional compounds such as nitrates and oxalates in the vegetables. Natural fermentation breaks down phytates, which block mineral absorption. A 2002 study showed that sauerkraut fermentation produces isothiocyanates, a class of compounds which appears to prevent cancer growth in animals.

Pickles, being made from cucumbers, citron, Indian gooseberry, other vegetables, are high in fiber which is necessary for digestive health and fighting cancer. Depending on the vegetable chosen for making pickles, they pack their nutrition in a palatable form.

The spices used for making pickles, such as fenugreek, dill and garlic, have the ability to regulate bacterial growth. They contain flavonoids, which being antioxidants, heal the body. Mustard seeds are known to be good for digesting foods and even turmeric powder has medicinal properties and is believed to lower rates of Alzheimer’s disease.

Fermented pickles also have good bacteria that can control harmful intestinal microbes. The lactic acid in pickles helps to lower fat in the bloodstream, improve circulation, and lower high blood pressure. It also helps to support a healthy digestive system, reintroduces good bacteria into the intestines, such as Lactobacillus acidophilus, and is beneficial for diabetics. In fact, one study even found that eating fermented products regularly contributed to lower rates of skin problems, asthma, and auto-immune disorders.

Many pickles are made with vinegars. In addition to imparting tangy taste, vinegar boosts the immune system, balances your blood pH, eases digestive disorders, decreases high blood pressure, and breaks down calcium deposits in a person’s joints. Apple cider vinegar adds its own special nutritive benefits to that of vinegar mentioned above.

It turned out that for us who live in tropical and hot, the white roof will be much more useful.

Surface of the roof covering on average 25% of the entire surface of the city. Meanwhile, the streets covered approximately 35% of the entire surface of the city. According to the study of Hashem Akbari,

a researcher of the Heat Island Group, when the 100 cities in the world to replace the roof with a white color, and also the street with a more reflective material, such as concrete roads than paved roads, then the resulting global cooling effect would be enormous.

specifically for the use of the roof is black: a black roof can add to the hot temperatures at the surface of the roof. (It’s because like what we had learned in school, that the black color absorbs heat (heat) is higher compared to white color. It will also result in increased temperature in the room

nah, to reduce the heat, probably the least expensive way is to paint the roof using white paint.
why?? : It’s because the white roof to reflect ultraviolet rays more compared to a dark color like black, and can reduce heat transfer into the room.

even the state of California is requiring all new buildings since 2005, using the white roof, the roof surface for flat or declining

then what to do to paint the roof using white paint to the reduction of global warming?

it is because, the use of white roofs can save or reduce the use of air conditioning by up to 15% in one year.
it’s just for one house. then imagine if there are 1 million homes that save the use of air conditioning as much as 15% of each house it would probably be helpful for global energy conservation. consequently, could be slightly reduced heating globalpun

application of this white roof, but can save energy and money, it can also be of little help in the process of saving the environment

agan afraid of his peculiar plasticity if the roof is painted white?
This might be a little picture.
here are some examples of p-colored building with a roof

The immune system’s primary defensive cells are the one trillion white blood cells or Lymphocytes, which are made in the bone marrow, the spongy inner part of the large bones. Lymphocytes are found in the blood, lymph nodes, and spleen.

There are three different types of lymphocytes: T cells, B cells, and natural killer (NK) cells. B cells grow to maturity independent of the thymus, and T cells are processed in the thymus, located in the upper part of the chest and mature there.

B cells secret soluble substances called antibodies into the body’s fluids. Antibodies typically interact with circulating antigens such as bacteria and toxic molecules, but are unable to penetrate living cells. T cells, in contrast, interact directly with their targets, attacking body cells that have been infected by viruses.

About 5 to 16 percent of the total lymphocyte population contains natural killer cells. The term “natural” before killer cells, means that natural killer cells don’t have to recognize a specific abnormality on a cell to be able to do their job. This is also called “innate immunity.” They are antigen nonspecific lymphocytes which recognize foreign cells of many different antigenic types.

Natural Killer Cells

Natural killer cells form the body’s front line of defense. Unlike our other immune cells, natural killer cells are always at the ready, while other disease-fighting cells take precious time—two to three days—to build forces and learn what the enemy looks like. When viruses and cancers attack, the cells keep the invaders at bay while the rest of the immune system prepares.

Natural killer are cytotoxic – that is, “cell killing.” Natural killer cells also produce substances known as cytokines, which assist the body in removing viruses and tumor cells. 

Since natural killer cells are able to kill tumor cells, scientists are studying ways to increase the number or enhance the function of these cells in the body as a way to treat cancer more effectively.

How T Cells Function

T cells constantly patrol our bodies and scan for other cells that display ‘foreign’ peptides that indicate a cell is infected with a germ or has become cancerous. They recognize cells that don’t belong in the body—such as bacteria—and activate other immune system players to sustain an attack on tumor cells. 

The highly focused receptor is the T cell’s strength but also its weakness. Because T cells are so specific, each patient’s cancer would need different T cells to recognize its subtle variations, and there are just too few tumor-specific T cells in each patient.

Combining The Power of NK and T Cells

NK cells don’t target subtle differences in cells. They have a receptor called NKG2D on NK cells that recognize many types of cancer, such as lymphomas, ovarian, colon, myelomas, and melanomas. 

Scientists studied how T cells interact with the immune system microenvironment, recognize antigens and respond to cancer.

Dr. Charles Sentman, an immunology researcher at Dartmouth Medical School and the Director of the Cancer Center’s Immunology and Cancer Immunotherapy Research Program, has engineered a way to genetically alter T cells so that they are tumor specific and have an improved ability to seek out and destroy cancerous cells while leaving normal cells alone. This widens their “field of vision” so they can target many different tumors.

To make the new designer cells, Dr. Sentman removed T cells from patients with myeloma or ovarian cancer and  reprogrammed them to include modified NKG2D receptors. These cells were able to efficiently kill the patient’s own cancer cells.

The new immune cells attack the tumor directly and activate the immune system to be much more aggressive against the tumor.

Read Also

Understanding The Immune System