The Human brain
We are still mystified by the way our brain works. At the top of our spin, reside three pounds of tissue, controlling everything that we do. Our brain works faster than any other computer. Processing much more information, in a very small lapse of time, than any powerful machine.
We can use our brain to make time move slower? If yes, this means that we can experience one second to be one minute or even one hour. Is it possible scientifically? Normally, if we are at risk of being injured badly or our life is at risk, we have the capacity of slowing time. In emergency time, our brain works faster than usual. Our body responds to this mechanism by the release of adrenalin, and other metabolism activities like pumping of heart increases, blood vessels carry more blood to different region of our body. The effect of these metabolism in our body, make us to feel that time has been slowed down. We respond faster to outside stimuli and react accordingly with much vigour and rapidity.
Now a small fact: have you ever watch a film which is so interesting that you nearly forget to take your lunch or you miss your rendezvous with someone.
That complex machine which is our brain, had million of years of evolution,
needs energy to survive. Our brain consumes one fifth of energy we take in. In emergency cases we find our own path.
Now let’s take an example. Someone found himself alone in the middle of nowhere in an unknown ocean, after his boat has been destroyed. He is on his lifeboat with a knife only. The question is how that person will be able to survive in the middle of the sea. The brain will at first search for something eatable and drinkable by releasing the hormone ghrelin and orexin. The latter come in tiny doses but have a profound effect. These hormones make us more alert, improve our muscle efficiency. But as time pass by, that person will understand that he has to adapt to the situation. The only way he can satisfied his hunger is by fishing.
Eating the flesh of a fish. But the later does not contain all the nutrients necessary to form a balance diet. So our brain makes us turn to the eye (fresh water), spin (vitamin), liver (vitamin), skin (vitamin) and other parts until we are fully satisfied. Our body needs all these nutrients to survive. So our control center in our brain orders it to find the missing nutrients. This also shows how our ancestors survived.
Reducing food intake can make you live longer. If someone remains without food for some days, what are the consequences? In mine opinion, the following will happen:
The body will consume at first the extra fats of the body. After that, it will consume the nutrients in the muscles and bones. Thus making them become very fragile. That person will enter in a survival state until he gets the food. If not, death will follow. In the survival state, every part of our body, growth of tissue, hair, heart beat, everything, slows down. The body consumes less and less energy.
Not everyone would like to be in the survival state everyday week. So what need to be done is to eat less. Fouling our brain to consume less, can make us live longer and hence slowing down the aging process. Food intake depend upon your metabolism and how physically active you are. Your body mass also plays a big role:
Normally bigger person would require more calories than smaller ones. Also consider that the more muscle mass you have, the more calories you need to function. Someone on a 2000 calorie diet should consume fewer than 20 grams of saturated fat a day, and trans fat can and should be avoided all together. The good fats are poly- and monounsaturated fats, which you should eat about 30% of your calories in.
By Arwin Doseeah
MODERN TECHNOLOGY: BIOTECHNOLOGY
Although biotechnology has been existed since ancient times, some of its most dramatic advances have come in recent years. Modern achievements include the transfer of specific gene from one organism to another known as transgenic, the growth and the maintenance of genetically uniform plant, animal and cell cultures, called clones, and the fusing of different types of cells to produce beneficial medical products such as monoclonal antibodies which are designed to attack a specific type of foreign substance. The scientist’s research in biotechnology is a disinterested pursuit of unlocking the hidden mysteries of the universe. The blessings of genetic engineering are innumerable but it can also adversely affect man’s existence. Biologists have begun to discuss the benefits and consequences of these technological and scientific advancements in the wake of the progress made in medicinal diseases like cancer organ transplantation, plant breeding and plant culture.
Biotechnology, like nuclear power, has enormous potential for good and bad. An area for which it is said to hold promise is agriculture. Biotechnology can increase agricultural productivity. Two approaches for improving crop productivity have been vigorously researched by experts: one is improving the plant breeds and the other is improving the efficiency of crop plant to utilize nitrogen from the atmosphere. In recent years, genetics has made progress in livestock breeding while hydroponics, a method of soil less gardening in which plants are grown in mineral nutrient solutions and in water, may help meet the need for greater food production as the world’s population increase. Biotechnology can also be used to reduce the use of pesticides while increasing the yields. Recombinant insect, an insect in which genetic recombination has taken place, have agricultural application and are currently being tested for their effectiveness as pesticides. Thus biotechnology promises to solve the intractable problems of hunger, famine and extreme poverty by increasing food production through sophisticated technological developments. The
Third World countries will not have to rely on international financial aid and be used as pawns in international games by the rich countries providing aid.
Biotechnologists also experiment and explore in the larger interest of the advancement of knowledge and progress in the field of medicine. Theoretically, the tools of genetic engineering can lead to tremendous gains in drug production, medical therapies and their improvement. Genetic engineering, it is claims, will help in producing new drugs and therapies- test tube synthesis of genes for insulin, new ways of producing antibodies, hormones, anti-cancer and anti-viral agents, vaccines against some tropical and viral diseases. Techniques for inserting genes into fertilized eggs of animals to provide a model to cure genetic disorders in human beings can also be developed. It is said that some modified bacteria can be useful as anti-pollutants. It will be the effort of some biotechnologists that holds the key to the cure of AIDS. The field of medicine employs some of the most dramatic applications in biotechnology: one advance came in 1986 with the first significant laboratory production of a blood-clothing protein that is not produced in people who have hemophilia and have been approved for commercial production in 1992 to clot the blood of such people to stop bleeding to death.
Nowadays, biotechnology is applied in various fields. In waste management, for example, biotechnology is used to create new biodegradable materials. Widespread production of plastic from a material made from lactic acid using the bacterial fermentation of discarded corn stalks is expect to become more economically viable in the future. Biotechnology also has applications in the mining industry. The bacterian “Thiobacillus thiooxidans” can be used to remove heavy metals from ores. The use of such microorganism for the decomposition of heavy metals has attracted increasing attention due to their low cost and high efficiency compared to conventional methods.
That’s all for me now. I think I have said quite a lot. Now its up to you to send me your comments.