December 8, 2011. Earthquake is one of the most terrible natural disasters, so far not fully understood. Although the location of major faults is well known, not many scientists can predict the time, location and strength of earthquakes. As during earthquakes released millions of tons of stones, a group of scientists from the University of Pennsylvania and brown University, studying the nature of friction at the nanoscale, made a discovery that will help to understand the nature of disasters.
Professor Robert carp, head of the faculty of mechanical engineering and applied mechanics, led the Read more [...]
According to The Courier Mail, the researchers examined a remarkable ability snails almost completely stop aging for a period of hibernation. Now experts want to find the genes that allow the snails to deal with over time. Perhaps the positive effects of these genes actually broadcast and on man.Dr. Scott Cummins, a molecular biologist at the University of the Sunshine Coast, said: "In this way, some snails can prolong his life from age 3 to 23. Dragging it in person, the duration would increase from 70 years to nearly 500."Now Dr. Cummings attempts to identify genes and neurohormones, Read more [...]
It sounds paradoxical, but the early gray hair in men is far from signs of premature aging, and the index of good health men. Results of studies have shown a link between hair color and general condition of the body. This conclusion is predictable, since all the organs and systems of the human body works as a whole system, being connected with each other. Between synthesis pheomelanin which makes hair red and brown shades and eumelanin, which gives brown and black hair, and the rate of destruction of the cells, that is, the aging process, there is a direct relationship. Pheomelanin synthesis Read more [...]
"Sea urchins living in the Red Sea, it seems, in practice, are immortal, - said a marine biologist from the University of Oregon (Oregon State University), Thomas Ebert (Thomas Ebert). - They are destroying predators, disease or some fishermen, but more than that then they have no signs of age. 100-year-old hedgehog can exist in the same way as the 10-year-old. "
Scientists thought that the sea urchins live for 10-15 years, while they measured the levels of a radioactive isotope of carbon - element whose presence is important increased in all living organisms, then the atomic bomb tests Read more [...]
Young people who are negatively reflect on old age, more at risk of getting sick in old age than their colleagues with positive thoughts
Young people thought that old age is heavy and disconsolate time in a person's life can actually lead to stroke and heart attack, according to U.S. experts, says "AMS" referring to the foreign media.Doctors have found that the treatment of old age may determine your future health in old age. Even after controlling for other factors that contribute to poor health, remains a clear link between the representations of the aging process and the development Read more [...]
Doctors have found evidence that a rare disease - progeria, premature aging, due in some cases, not so much by mutations in the DNA as the inclusion of the wrong genes are needed. Children Progeria, she Hutchinson-Gilford, very rare, doctors know less than one hundred cases of the disease. But it is quite well known among both scientists and the general public - because it is a premature aging. By the age of two to three years, the child begins to age, and life expectancy with progeria is only 13 years old. Atherosclerosis, changes in the joints, liver spots on the skin thinning, increased Read more [...]
As stated earlier in this chapter, chain reactions are typical for most scenarios of catastrophic events in the different areas. However, in most cases, these "reaction" does not occur or is limited in scope, so it's important to clearly understand the forces which prevent their emergence and development.
In a classic example of nuclear physics is clear that to start a chain reaction, you must have the "critical mass" and the lack of a "safety rods." That is, the development of exponential processes are constrained by limited resources for their growth and the Read more [...]
Human aging - is a biological process of gradual degradation of parts of the human body and the effects of this process. The aging process is associated with many factors. It's like the psychological, social, economic factors, and natural. But the biology of the process to date is not fully understood. Despite modern medicine, delay aging can not last long. Aging is accompanied by changes in the metabolic processes of the body, as well as changes in brain activity.
In different countries, the ratio of old people is different. In underdeveloped agrarian economies old people are highly Read more [...]
Old age and aging. Old age - Is inevitable, coming to replace the maturity period of the life of humans and animals, characterized by reduced compensatory abilities and reactivity.
Old age is the result of a dynamic process - aging.
Aging - A long biological process of aging changes of the body, starting long before old age, and inevitably leads to a gradually increasing restriction of the adaptive abilities of the body and increase the likelihood of death. Age-related changes that occur at the cellular, sub-cellular and molecular levels, in different organs and systems are developed with different Read more [...]
In the prevention of premature old age is given to significant regime of the day. Rational organization of the day, the regular alternation of work and rest - all contribute to the normal course of metabolic processes in the body and prevents premature aging.
Of great importance is the nature of the work. Hours of heavy physical labor exhausting, devastating human and contributes to premature aging. Carried out in the Soviet Union, the mechanization of work involving heavy physical labor, and the establishment of an earlier retirement age for persons employed in certain industries, is of great Read more [...]
In capitalist countries, where state officials pronounced many hypocritical words "human rights", the high sense of "personal freedom" in the newspapers a section which never empty. Are reports on suicides.
But in this terrible accident a newspaper section heading even more tragic. Statistics show that 70 percent of suicide falls on the elderly.
This is understandable. Under capitalism, where the ruthless machine operation quickly squeeze all the juice out of the working man and turns him into a failed prematurely, old, helpless disabled, the elderly, of course, are in a Read more [...]
Although the current international classification of old - people older than 75 years, the meaning given in the given thesis, much wider. We should not so much and not only for the elderly, but about the people of the older, strictly formal - of those over 60. But this figure is arbitrary. You can not feel the pressure of age or creatively or physically in 80 years and be decrepit in all respects to the 40.
Every age its inherent understanding and attitude to old age. In ancient Rome, with an average life expectancy of 28-30 years old people were considered middle-aged, and in 60 years they Read more [...]
Etiologic factors of age increased incidence of venous thrombosis may also be structural changes in the walls of the veins due to the following reasons: 1) the fluctuation velocity of blood flow (due to lower heart rate and cardiac output), 2) an increase in blood viscosity, and 3) increased levels of fibrinogen and 4) the general slowing of fibrinolysis.
Since atherosclerosis progresses with age, more likely to have blood clots and atherosclerosis. However, the incidence of arterial embolism definitely shows no age dependence.
Rheological studies showed that arterial narrowing, progressive with Read more [...]
We also know that detoxification processes in the aging body is much less effective than in the young. In tests with the introduction of chemotherapy drugs found that in old age education glucuronic acid derivatives, which serves as an important mechanism for detoxification, is slower and in a manner neutralized smaller proportion administered substance. Or does not provide a synthesis of liver enzymes needed in sufficient quantities, or the enzymes are no longer possess the original activity. Graying of hair also explain the lack of an enzyme (tyrosinase), or loss of its activity in the elderly.
Age-related Read more [...]
If collagen is well studied, then the synthesis of elastin, we know almost nothing. Elastin - This is another important skleroproteid, which gives inoglia elasticity. He is very different from the collagen in the number and sequence of amino acids. The pancreatic juice contains enzyme, specifically adapted to the splitting of elastin - elastase (pancreatic peptidase), under which the elastic fibers break down into thin fibrils. Elastase consists of two components with different pH optimum. With age, the structure of collagen and elastin is variable changes accordingly and their reaction to Read more [...]
Somatic mutation theory was recently reinforced by Curtis and Szilard experiments with ionizing radiation. Spontaneous mutations and non mitosis continuously occur in all tissues available for research and accumulate with age. Mutant cells in large numbers are found in almost all organs of the old people as well as animals. Are abnormal cells, and they weaken the function of the relevant authorities. With mutagenic ionizing radiation can produce results similar to those that result from natural aging, which means that we can accelerate the aging process. Determine the number of mutations is Read more [...]
Aging leukocytes shows in morphological changes in the segmentation of their nuclei. Such cells can no longer divide and die after a while. For functional gains, achieved greater differentiation of a single cell, it pays loss of the ability to divide and ruin. Cell epidermis is able to share, as long as it is in the basal layer, but then it gradually moves to the upper layers. This is followed by differentiation. Epithelial cell produces enzymes or gums, after a while she exfoliated or dissolved enzymes. This is the death of a single cell, but to the body which should continue to operate, Read more [...]
In recent years, many have a better understanding of the relationship between natural and pathological aging. It was found that the enzymes are of great importance for gerontology and geriatrics. In old age, the enzymes produced in the body in small quantities, and their activity is partially reduced. As we shall see, these changes are in part based on the symptoms of both normal and premature aging.
Ever since the days of early antiquity man showed a lively interest in the processes of aging. The main attention is focused on the question of the possibilities and means to prevent these processes Read more [...]
In about 50 years of age is marked decrease in serum albumin and total albumin in the plasma. Globulins are generally not susceptible to age-related changes, decreases only content?-Globulin. In the physical-chemical terms, these changes can be seen as a shift towards a more coarse dispersion. Slightly increased share of the fraction containing neuraminic acid. With immunoelectrophoresis can show that increased fibrinogen, haptoglobin,?-Lipoprotein, sour? Glyukoproteidov-and C-reactive protein.
Quantitative analysis shows a decrease in immunoglobulin fractions IgG and IgA. Activity antibodies Read more [...]
December 8, 2011. Earthquake - this is one of the worst natural disasters so far not completely studied. Although the location of the major tectonic faults are well known, not many scientists can predict the time, location and strength of earthquakes. Since during the earthquake released millions of tons of rock, a group of scientists from the University of Pennsylvania and Brown University, studying the nature of friction at the nanoscale, made a discovery that will help to understand the nature of disasters.
Professor Robert Karpik, head of Department of Mechanical Engineering and Applied Read more [...]