Developmental biology is a science involving the greatest range of biological problems. It plays a unifying role for different biological sciences and provides the framework for the integration of molecular biology, cell biology, physiology, anatomy, oncology, immunology, and even evolutionary and ecological research. Study of the embryonic development of organisms is necessary to understand any other fields of biology. Developmental biology is considered basic for studying other biological disciplines.
The development of a new life is a spectacular process, which constitutes a masterpiece of controls temporal and spatial gene expression. The developmental biology focuses on the effect of different genes on phenotypes and epigenetic parameters likely to modify them. The discoveries in this field of investigation to understand development, such chromosomal anomalies anomalies of Down syndrome.
Multicellular organisms are formed as a result of quite a slow process of progressive changes, called development. The multicellular organism development generally starts with is a single cell, a zygote, which divides mitotically and gives the beginning to all the cells of organisms. The science that studies the development of animals, by tradition, is called embryology, because the developing organism from fertilized eggs to the stages before birth is called an embryo or fetus. Continue reading “Developmental Biology Essay”
Black hole is a region in space-time, whose gravitational pull is so great that it could not even be left by the objects moving at the speed of light, including quant of light. The border of this region is called the event horizon, and its typical size is the gravitational radius. In the simplest case of spherically symmetric black hole, it is equal to Schwarzschild radius.
In theory, the possibility of the existence of such space-time regions is based on some exact solutions of Einstein’s equations, the first of which was received by Charles Schwarzschild in 1915. The inventor of the term is unknown, but the designation itself was promoted by John Archibald Wheeler and first publicly used in popular lectures Our Universe: the Known and Unknown, December 29, 1967. Earlier such astrophysical objects were called “stars” or “collapsed stars” as well as “frozen stars.”
The question of the real existence of black holes is closely related to how true the theory of gravitation, which shows their existence, is. In modern physics, gravitation theory, confirmed experimentally, is the general relativity theory (GRT), confidently predicting the formation of black holes (but their existence possible and within the other (not all) models, see: alternative theories of gravitation). Therefore, the observed data are analyzed and interpreted in the context of GRT, although, strictly speaking, this theory is not experimentally confirmed for the conditions corresponding to the region of space-time near black holes of stellar masses (but is well confirmed in the terms of supermassive black holes). Continue reading “Research Essay on Black Holes”
Space tourism refers to the space or orbit flights, financed by private funds with entertainment or research purposes.
The idea of space tourism for the first time, was reflected in a number of works by Barron Hilton and Eric Kraft, published in 1967. They first tried to promote an idea of space commercialization. At that time, the attempt was not successful.
Space tourism began to develop in the late 20th century. In 1986, the report on the Potential Economic Implications of the Development of Space Tourism was read at the International Astronautical Congress and caused a lot of discussion not only in research, but also in business circles.
The first tourist would become an American teacher Christa Mcauliffe, who died when the space shuttle Challenger exploded in 1986 year. After this incident, the Government of the United States passed a law that prohibited to non-professionals flying into space.
In 1990 and 1991, respectively, there were the first commercial flights with Japan astronaut Toyohiro Akiyama and Helen Sharman from United Kingdom, who flew to the Soviet space station “Mir” on spacecraft Soyuz TM-11/Soyuz TM-10, Soyuz TM-12/Soyuz TM-11 on non-State-funded projects by private broadcaster TBS and the Juno (a consortium of British companies). Continue reading “Free Space Tourism Essay”
The history of fashion studies type, way, representation, and the domination in society in the period of certain forms related to different spheres of human existence: art, clothing, speech, behaviour, etc., which are due to the national traditions, perceptions of aesthetic ideals, prevailing tastes, cultural and scientific achievements, the development of economy and industry, household needs.
Fashion, despite its authoritative, vivid expression, is short-lived, as there is an unquenched thirst for novelty and an attraction for diversity in human. Change in fashion is the rhythm, like the breath of life itself. That is why it carries prints of various phenomena. The fashionable outfits can be influenced by some artistic trends and fads of some dandies and political development and the economic stratagem by textile workers, it as well can be the conflict of generations, and the nostalgia for the past.
The history of fashion is perhaps the most truthful mirror reflecting through clothes the essence of society of the certain age. Ancient Greece gave us the classical art and philosophy. The human body was considered a standard of beauty and perfection. The clothes then were of high aesthetic level, and observed a certain proportion and harmony of lines. Continue reading “Essay on History of Fashion”
Domestic violence, or violence in family, is a recurring violence by one partner over the other in close relationships, particularly in marriage. It can be expressed in the form of physical, psychological, sexual, or economic violence. Domestic violence is often accompanied by child abuse and ill-treatment of animals.
By the definition of the National Center for the prevention of domestic violence, this type of violence is characterized with recurring abuse with increasing frequency cycle of physical, sexual, verbal, emotional, and economic abuse and pressure against their loved ones in order to gain the power and control over them.
The gendered nature of domestic violence, according to the recent research, significantly shifted toward the violence against women, according to other, it is symmetrical or close to the symmetry, but varies by the significance the caused damage.
Domestic violence does not depend on homosexuality and occurs in male and female same-sex relations as frequently as in opposite-sex relations. Continue reading “Essay on History of Domestic Violence”
The health care reform also known as The Patient Protection and Affordable Care Act or simply Obamacare became one of the most ambitious projects in the history of the United States since the mid-1960’s.
Those of you who want to write an interesting college essay on pros and cons of Obamacare have to understand that the reform is an initiative of President Barack Obama and to date is considered to be the main achievement of his presidency.
This is the first attempt to reform the U.S. Health Care system of the United States since the 1960s, when the President Johnson created public Medicare and Medicaid, to help pensioners and the poor. The current reform was attempted back in 1993, however, unsuccessfully by Clinton’s administration.
Over the past thirty years, the health care costs have increased disproportionately in America, although there were not any objective prerequisites for this in the form of improved quality of services. During the last decade, the insurance cost per employee has more than doubled. A large part of the population remains uninsured, and the proportion of such people is growing. The insurance sector, provided by employers, is highly monopolized, hampering the mobility of the labor force and creating the conditions for discrimination of patients both before and after signing the insurance contract, including the denial of payment. The ever-increasing cost of Medicare and Medicaid is one of the reasons for the rushing United States budget deficit. Continue reading “Essay on Pros and Cons of Obamacare”
Today, Sci-fi movies are associated primarily with the adaptations of the comic series or the teenagers oriented bestselling books. That is, frankly, not a real sci-fi, where the first word stands for science. Interstellar,
directed by Christopher Nolan, who directed the Batman trilogy, has been shot to improve the situation and become the blockbuster, which cherishes the ideas of real scientists.
I do not really understand the modern physics, but in general, Interstellar makes a great impression. There are huge space ships, and various paradoxes and unexplained natural phenomena, which is not at all boring in their details and explanations. They say, it is not without blunders, but they do not hinder you to enjoy the movie.
For me as an average moviegoer, the plot, atmosphere, characters is much more important. And here Nolan put all in perfect order. The plot is good enough even for a three-hour of the opus, you will not be bored for a minute. The atmosphere of deep space is dramatized by the epic music by Zimmer. And the characters are lovingly acted by the great actors, who are, I believe, the most talented in our time. Continue reading “Essay on Interstellar Movie”
Recently, they have asked me: “What inspired me to grow trees”? It made me fall to thinking. It would seem to be a simple question, but it made me take thought about what brought me over to that world understanding where I am now.
I was fond of trees since I was a child, and I always liked a lot to draw their roots, branches, their trunks of unusual involute form. Tree as a form are very interesting in itself and I could analyze them for hours and to see many various connections. Foremost, it is connection between the past, present, and future. Roots go downward, into the past, and branches grow upward and there are always new: they present the future. It is for reason that family is often presented as a large tree. In antiquity, people presented the worlds as based on tree. Even the word “antiquity” reminds me the word “tree.”
Even with a naked eye it is possible to see that the structure of a tree (its silhouette on the whole) is very similar with the patterns capillaries build-up in the animal and human, with lightning, with patterns the rivers draw on their way to the ocean. All these are universal and very well carefully thought out structures (fractals), more effective than you can think of something. Continue reading “Essay on Benefits of Afforestation”
Many people’s dream is to find treasure with treasures, to win a jackpot or scrape up a fortune. They, however, do not know that incomparably greater treasure is inside themselves, in their heart, in their soul.
The world changes, its attitude, its ideology changes too. Already long ago we forgot the exact definition of such categories as wisdom, it was replaced by knowledge; happiness, which we know now as prosperity, habit and moment of leisure, satisfaction; a conscience is replaced by the line of behavior.
It is extraordinarily difficult to unravel the living ball of spiritual life and to trace interlacement of separate filaments forming it: moral and philosophical reasons and ideas; in this matter, we can hope only for a vague understanding.
Presently, only little attention is paid to the moral values; there is no common criteria, no strict orientation, except moral differentiation of acts and positions for good and bad, righteous and wicked. Continue reading “Essay on Importance of Moral Values in Human Life”
Music was in my life long before I learned to distinguish different styles and genres, knew about work of great composers and musicians. The first melody that I still remember was the lullaby my mother sang to me when I was a kid. When the lullaby lyrics ended, my mother continued to vocalize quietly, and her melodious tunes calmed me down and, certainly, put the beginning to my love for music. Then, there were musical theatricals and plays, favorite child’s songs and first idols.
My taste changed accordingly to my age as I grew up. One day I liked rock, the next it was pop-music, in another week I was ready to give the last money for the records of well-known rep performers, sometimes under a mood listened to reggae, and did my homework listening to the popular songs played on various radios. And all the time it seemed to me that without music my world would be imperfect, as cold beauty is repellent without a warm smile, or a sea becomes boring without a gale and white horses on waves. Continue reading “Essay on Role of Music in My Life”