Saturday, December 28, 2019

2017. Stem Cells. Many People Around The World Like The

2017 Stem Cells Many people around the world like the idea of stem cells, but are they really a good thing? Stem cell research is debatably the worst way of solving problems with the human body. In fact Scientists have been researching stem cells for a very long time, since 1956 when the first successful bone marrow transplant was made by Dr. E Donnall Thomas. There are not many cons to not use stem cells but they are very important to consider. Stem cells should not be used in the medical field due to ethical issues, health concerns, and a lack of research. There has been a lot of people talking about stem cells and its all over the news. Although most of the people agree with the method to get stem cells and what people use them for,†¦show more content†¦The blastocyst consists of an outer layer (trophoblast) which is attached to the inner cell mass.) According to New Health Advisor ESC may not be accepted when used in transplants because there is no process to generate them o r make them. They can even cause tumors when used directly from undifferentiated culture prep, which means that the cells are all on the same path to make new cells or a new organ. There is also the problem with technology where scientists don’t have a way to mass produce adult stem cells in large quantities. Adult stem cells Cannot be grown for long periods of time in culture (Culture is the growth of bacteria or of tissues in scientific study or medicinal use.). There is no sure way to know if the body will reject the stem cell transplant so that makes embryonic stem cell treatment that much unsecure. The problem with adult stem cells that it is hard to make cells efficiently is the same for ESC they have no way of making an effective process to produce ESC. Scientists are so far behind in research and there are so many advances in technology that could have been discovered but more research has to be done on the topic to obtain a full understanding of stem cells Due to the drawbacks of people cutting funding and passing laws to stop production of stem cells, people still think that if scientists harness the use of stem cells they can find the cure to cancer and many other diseases or viruses Scientists couldn t find aShow MoreRelatedThe Controversy Of Eugenics And Genetic Engineering1632 Words   |  7 Pagesgenetics. Mendel’s work was discovered in 1900, and, as a result, â€Å"eugenics movements†¦had, in fact, blossomed in the United States, Canada, Britain, and Scandinavia, not to mention elsewhere in Europe and in parts of Latin America and Asia† (Kevles 435). Many of these countries, even the United States, adopted eugenic practices. One such practice was sterilizing those deemed â€Å"mentally unfit† to reproduce, attempting to eliminate mental disabilities as a result. However, these practices fell out of favorRead MoreBlood Cancer Essay915 Words   |  4 PagesCuring Cancer One Stem Cell at a Time Stem cells transplants in cancer patients has been proven to not only help, but in some cases, cure certain types of cancer. I mean that’s crazy, right? Have humans finally found the key to curing THE CANCER for good? With the research that is taking place with stem cells, I would say we are definitely on the right path to solving that supposedly unsolvable puzzle that has plagued mankind for so long. Stem cells are Cells with the ability to divideRead MoreThe List Of Pros And Cons Of Human Cloning1624 Words   |  7 Pagesource4 : The list of Pros and cons of human cloning Summary: The necessary technology has been created, as evident in the story of Dolly the sheep. People still pose questions such as the role of God in Society. Here is a list of pros of human cloning : It could eliminate defective genes , It is considered as the logical next step in the reproductive technology, It could aid in faster recoveries from injuries, it gives a new meaning to genetic modification. As all things human cloning also has consRead MoreStudent Application Essay1742 Words   |  7 Pagesschool where teaching, research, and mentoring are all highly valued. Throughout my careers, I have initiated and led teams of as many as three interns in research projects. I am primary or co-author of five peer-reviewed research papers and have presented at more than ten major conferences in the field of biomedical sciences, including International Society of Stem Cell Research conference. As a biomedical scientist with nine years of research and two years of teaching experiences , and passion forRead MoreEthical And Social Problems Of Genetic Engineering1478 Words   |  6 Pagesbiotechnology. Genetic Engineering is developed to make cell growth faster, increase production, and protect against diseases. An organism that is produced through Genetic Engineering is called Genetically Modified Organism or GMO. The first GMO was a bacterium produced in 1973 in a lab and in 1982 Insulin became the first GMO commercialized product available to the public. In the 21st century, Genetic Engineering is affecting people across the world since most products such as corn, rice, insulin, andRead MoreA Plant-Based Diet Could Save The Planet Essay1446 Words   |  6 Pagesand desolate, full of poisonous gases and an uninhabitable planet. Many assume this is an exaggeration of what life will be like in 900 or so years, the growing idea of climate change is not. With humans neglecting their options to halt climate change, our environment slowly deteriorating is not a fa r-fetched science fiction story. Becoming a vegetarian is an easy and affordable way to help fight climate change. But, when many people are not willing to take that giant of a leap, there are other ethicalRead MoreBlindness Essay964 Words   |  4 Pageshim from changing the music industry to how it is today. The number of people around the world affected by blindness. Worldwide almost eighty percent of all visual impairment is avoidable (Marcovitz 7). Luckily, over twelve million suffer from less degrees of vision impairment (Plone 2017). World Health Organization â€Å"as many as three-hundred million people will suffer from blindness or other severe vision disabilities† (NFB 2017). Blindness affects more than one million Americans who fit severe visionRead MoreThe Medicinal Plant Of Medicinal Plants1365 Words   |  6 PagesWhat is your favorite medicinal plant? There are hundreds of medicinal plants throughout the world and have been used for thousands of years by many people. There are numerous of medicinal plants still used today and we are constantly finding new uses for these plants. Medicinal plants are common plants that most people use every day, but you do not know that they are in your vitamins and other medicines. One such plant is the Blood Flower which is a very be autiful flower that has very importantRead MoreCure For HIV1156 Words   |  5 Pagesawaited battle due to the virus lying dormant in T cells for years. Although scientists have found a protein called CD32a that lives on the surface of T cells. Due to this discovery, scientists can now use this protein to help distinguish the cells infected with HIV. This is beneficial because even though there are antiretroviral drugs that can prevent cells that are actively duplicating viral DNA from replicating, they do not attack the dormant T cells. In the past, a shock and kill therapy methodRead MoreIntroduction.. Humans Are Known To Be Omnivores And Meat1595 Words   |  7 Pagessource of omega -3 fatty acids, vitamin B12, protein and iron (Verma and Banerjee 2010). Livestock sector is one of the fastest growing agricultural subsector globally, employing 1.3 billion individuals and supporting around 600 million poor smallholder farmers in the developing world (Thornton et al. 2002). Livestock provide us food such as meat to maintain the health of the human body (Nestle 1999). With population growth, urbanization, economic growth, and flourishing markets, an increase in global

Friday, December 20, 2019

Art Of The Renaissance Questions And Vocabulary

Ryan Cho 8/28/16 AP European History 1-2 12.5 Assignment 12.5 (Art in the Renaissance) Assignment- Questions and Vocabulary Terms: Giotto, Masaccio, Botticelli, Perspective, Guild, Artisan, Apprentice, Patron, High Renaissance, Pope Julius II, Michelangelo, Northern Renaissance, madrigal. 1) Giotti di Bondone (1266-1337) was an Italian artist and architect from Florence in the very late Middle Ages. He is considered to be one of the most important artists in Italy because he contributed greatly to the Renaissance style of painting and art in general. Many historians today believe that di Bondone started the great art of painting as we know it today, introducing the technique of drawing accurately from life, which had been neglected for more than two hundred years.† 2) Masaccio (1401-1428) was the first great painter/artist during the Italian Renaissance. He was regarded by many as the best painter of his generation because he could re-create like life figures and give people a sense of three-dimensional works. Sadly, he could’ve had much more to offer to Renaissance Italy, but died at the age of 26 of reasons still unknown today. 3) Sandro Botticelli (1445-1510) was an excellent Italian painter during the Early Renaissance. He attended the Florentine School (under the patronage of Lorenzo de ’Medici) and would then go on and produce some of the most famous paintings during the Renaissance- Primavera and The Birth of Venus. Many historians see Botticelli’s work as a visualShow MoreRelatedThe Rise Of The Renaissance Essay1525 Words   |  7 Pages The Renaissance began in Florence, Italy around the 1500’s to about the 1700’s. Florence, Italy was the mecca of this rebirth because at the time Florence was extremely wealthy and the people of the city had political freedom and those new ideals of the Renaissance were not being condemned in Florence as they were other cities. This was a time where the arts and the logic of one’s own mind was valued rather than criticized, the antiquated medieval ideals no longer matched the needs of those whoRead MoreThe Horse And Rider Of The Renaissance1827 Words   |  8 Pagesenvironments, permeating all of society during the Renaissance. The popularity of this animal produced a unique and influential identity for the horse during this period, and this identity constituted several parts. With this multifaceted identity, the horse received new roles in human society. I am attempting to explain these roles of the horse and their effects on the horse and human. By first exp laining the context of the horse and rider of the Renaissance, I set up a discussion of the specific changesRead MoreIslams Influences on the Modern World1422 Words   |  6 PagesAfrica). Islam is currently the second most practiced religion globally. Throughout the Middles ages and the centuries leading up to them Islam was one of few lifestyles which encouraged culture, art and an open state of mind, making it a perfect breeding ground for scientific advancement and progression of the arts. Islam has shared some of the greatest discoveries and revolutions of the pre-modern age, all of which have undoubtedly assisted in the construction of the western world we inhabit. One essentialRead MoreNorthern Humanism, Renaissance, and Late Mannerism1960 Words   |  8 Pagesthe Northern Renaissance and late mannerism, also encountered by Reformation, which separated religious unity. During the Reformation, hostile groups known as Protestants were formed against the church because they wanted a complete renovation of the church and Roman Catholics. Late mannerism emerged at the end of the century and had little influence on Spanish literature, but overruled Spanish painting. Late mannerism also had a dominant impact of the Counter-Reformation on arts, architectureRead MoreThe Soviet Regime And Cultural Organizations1472 Words   |  6 Pagesperished as a result of the Soviet regime. Les Kurbas and Mykola Kulish were executed, along with many others, in the â€Å"Executed Renaissance†. Many literary geniuses from Ukraine were censored and killed as part of Stalin’s programs, which began in 1920, repressing Ukrainian creativity and developm ent in other spheres of literature, not just theater (Executed Renaissance 2011, Studio 1+1). Famous Ukrainian Playwrights And Their Contributions Les Kurbas – Often referred to as the father of UkrainianRead MoreBiography of William Shakespeare1709 Words   |  7 Pagesany pupil during that time in school and as well no one who taught at the school. Therefore, the claims that Shakespeare had very little or no education by proponents is unbased. Anti-Stratfordians also question how Shakespeare could have written the works characterized by an extensive vocabulary such as in the plays and poems of the Shakespearian works. No signed letters or manuscripts are left and the six authenticated signatures are written in a form of handwriting that disappeared by 1700 knownRead MorePoe vs. Shakespeare Essay1556 Words   |  7 Pageswhich was influenced by the time eras they lived in. Poes writing used an intricate vocabulary that created mysterious imagery to capture and lure the reader into the story like in â€Å"The Raven†, â€Å"But the raven, sitting lonely on the placid bust, spoke only, That one word, as if his soul in that one word he did outpour.† (Poe, 1845, 55-56) Shakespeare wrote in the language that was used in his time, the Renaissance or more specifically Elizabethan times. Shakespeare was a master of the artistry ofRead MoreLanguage : Does It Influence The Way We Perceive The World?2676 Words   |  11 Pageslanguage of Newspeak that was ascribed to the inhabitants of Airstrip One, a prefecture where all forms of individualism, independent thought and creativity were persec uted and â€Å"thoughtcrimes† were punishable by law. John Lucy (1997) asked the question: does using language in a particular way, (e.g. schooled influence thinking? Do discursive practices influence the way that we think, by altering structural influences? Lucy argues that although there are a number of proposals regarding linguisticRead MoreEssay about The No Child Left Behind Act of 20013306 Words   |  14 PagesAfrican-American males are compared to other demographics. NCLB prompted schools to focus more on remedial instruction and test-taking strategies. Consequently, educators had to â€Å"shift resources away from important but non-tested subjects†, such as art, physical education, and music, and â€Å"to focus instruction in math and reading on the relatively narrow topics that are most heavily represented on high-stakes tests† (Dee and Jacob, 2011, p. 418). Furthermore, instructional effort was reallocated awayRead MoreEssay about Middle East Art and Society2546 Words   |  11 PagesMiddle East Art and Society This is how I feel when trying to understand art from nothing. The codes of communication, the means by which we understand language are not clear. Art is a language, but a symbolic one. I am trying to understand the reasons and the culture that produces this language. My learning plan, written a few months before we departed for our program, was focused in trying to understand the relationship between culture and art in the Islamic countries. An Islamic art definition

Thursday, December 12, 2019

Cosmic Redshift free essay sample

The new Physics of Cosmic Redshift Introduction:As we all know that light travels from source in a straight line(ray) according to concepts of classical ray optics. Redshift is the phenomenon by which light rays from distant stars that are observed on earth, show smaller frequency (longer wavelength) i. e. shifted towards the â€Å"red† end of the visible light region. This phenomenon of redshift is conventionally explained by the well-known â€Å"Doppler effect†. But according to the book â€Å"QED: The strange theory of light and matter† by Nobel Laureate Richard Feynman Redshift occurs due to the quantum mechanical propagation of photons. The Problem:Edwin HUBBLE discovered that light from distant stars exhibits longer wavelengths or reduced frequencies than that from similar radiation sources on Earth. All specific frequency lines in the electromagnetic spectrum of distant cosmic radiation sources appeared shifted towards the red end of the visible spectrum. His discovery therefore was called â€Å"astronomic redshift† defined by the redshift ratio, z = ? / lo (1), ? l: the elongation of a specific wave length lo: the original wave length of emission at the source Frequency n and wavelength lo of the radiation are correlated by the velocity of light in vacuum, c = n x (2). From on its discovery the Redshift phenomenon was referred to the â€Å"Dopplereffect of wave dynamics†, occurs when the source and the receiver are moving relative to each other. Hence this theory proved that all the distant stars , galaxies are moving away from the Earth i. e the universe is expanding. The apparent radial recession velocity away from Earth can be calculated following the Doppler equation: n/no= (1-v/c) (3) n: a specific frequency of the arriving light, no: corresponding frequency of emission at the source v : the recession velocity of the source c the velocity of light in vacuum Simultaneously, HUBBLE discovered that the apparent recession velocity of cosmic radiation sources increases proportionally to their distance r from Earth: v = H x r (4), H means the famous HUBBLE-constant currently estimated at about 70 km/s per megaparsec or per 3. 6 million light-years. Hubble’s theory led the current view that the universe has formed from a gigantic explosion called â€Å" the Big Bang†, which spontaneously arose from a tiny volume of matter at unimaginably high temperature followed up by adiabatic expansion and the condensation of matter while cooling down. Apparently, this expansion process is still going on today. Following HUBBLE? s law (4), the escape velocity of an extremely distant galaxy might gain ultimately the velocity of light in vacuum, meaning its redshift ratio would theoretically equal unity. Physically of course, this is impossible nevertheless redshift ratios of z=5 and even z=7 have been measured in recent years showing supernova explosions, which apparently occurred further away from Earth than the age of the Universe postulated at about 14 billion light-years. In addition, as well known, various other inconsistencies weigh upon the Big Bang theory and many a scientist therefore questions this view. The new theory (methods used and result): The new theory uses the concepts from the â€Å"quantum electrodynamics†. He (Richard Feynman) explained the quantum mechanics of the linear propagation of photons. He showed that from the countless number of radiations that are emitted from the source only those are really effective which reach the source (cover the distance b/w them) via straight line and in close company i. e. when they cover the distance in the shortest possible time. All other dispersed photons take larger time to reach to the receiver and hence are ineffective. He said that the straight stream of photons emitted from the distant source to the Earth will meet/collide innumerous bodies (such as stars, galaxies, planets, comets, meteorites, grains, etc. hich are swirling around in the universe with a typical speed of few hundreds kilometers per second) through which the photons can not pass. When those bodies cross a straight ray of light, this ray will be interrupted shortly and all photons dropping onto the bodies will be removed from the stream independently of their individual energy or frequency. After many such interruptions only the few remaining photons will reach the Earth and the frequency of these radiations arriving on the Earth exhibit lower frequencies because the dispersed photons did not rech in time to the earth. Thus the frequency shifts towards the red end of the visible region (spectrum). As the number of interruptions depend (directly proportional) on the distance between the source and the destination, the redshift ration is also directly proportional to the distance between the source and the receiver ( Earth ). Thus this theory confirms the Hubble’s discovery that the redshift ratio depends upon the distance. HUBBLE? s law still implies another connection. When replacing in equation (4) the recession velocity v by the product z x c, i. e. y a fraction of the ultimate velocity of light, an interesting correlation arises: z = H/c x r (5). The constant factor H/c can be regarded as a modified HUBBLE-constant, which amounts to 0. 00023 per megaparsec or 0. 00007 per million light-years. This modified HUBBLE-constant signifies the loss of photons suffered by a beam of light, which has traveled one million light-years through the Universe. It is a very small loss of photons in fact ov er such big distance, confirming our experience that the Universe is largely empty of solid matter. The reciprocal of the modified HUBBLE-constant i. e. 1/0. 00007 gives 14 billion light-years, in accordance with the postulated age of our Universe following the conventional theory. However, the meaning is different. It shows namely that ordinary starlight cannot propagate further through the Universe than 14 billion lightyears. All photons grouped in a straight light beam from a remote source to the Earth would have got lost due to the absorption effect of celestial matter. Usually, we cannot look deeper into the Universe than this distance, corresponding theoretically to a redshift ratio of unity. However, what about those bigger redshift ratios of z=5 or even z=7, which have been observed in recent time? We know from nuclear physics that energetic radiation penetrating through a shielding medium will be absorbed according to the general correlation, E = Eo x e^ µ(gama) (6), E means the radiation energy behind the shield, Eo the energy of emission at the source, the absorption coefficient of the shielding medium and r the traveling distance through the medium. In the present case, it makes sense to take the modified HUBBLE-constant H/c as a cosmic photon absorption coefficient and r as traveling distance of a stream of photons through the Universe. The energy of photons emitted by a heat source corresponds to the well-known correlation, E = kxT (7), T: the surface temperature of the source k: is the BOLTZMANN-constant On the other hand, the photon energy corresponds to PLANCKs equation, E = h x n (8), h is the PLANCK-constant and n the frequency of the photons. From equations (6), (7), and (8) follow the correlations, n/no = T/To and E / Eo = e-H/c . r (9). Referring to the previous equations (1) and (2), one finds that the cosmic redshift ratio equals z = e H/c . r – 1 (10). The distance of a cosmic radiation source therefore can be estimated from its redshift ratio according to r = 1 / H/c x ln (z + 1) (11), with H/c = 0. 00007 per million light-year. For a redshift ratio of z=1, for instance, one finds 9. 9 billion light-years, and for z=5 a cosmic distance of 25. 6 billion light-years. Conclusion: -According to this new theory more accurate age of universe can be calculated -In contrast to the traditional redshift theory, the present new physics of cosmic redshift doesn’t show any upper limit of ‘z’ or any restricted age of our Universe respectively. Referring to the aforementioned equations, the cosmic redshift ratio also equals, z = To/T – 1 (12), i. e. it is proportional to the ratio of the surface temperature of a cosmic radiation source To and its apparent temperature T observed on Earth. The light rays from a remote cluster of galaxies at an average surface temperature of about 5800 °K as our sun would show the apparent temperature of 970 °K (700 °C) on Earth, when arriving from a cosmic distance of z=5 or 25. 6 billion light-years. This cluster, of which most of the photons got lost on the way to Earth, would be invisible to ordinary optical telescopes. However, cosmic radiation sources of much higher surface temperatures or bigger emission energy like supernova explosions would still be visible over such extraordinary distances, which largely exceed the age of our Universe as postulated from the big-bang hypothesis. taken from the paper itself) -In contrast to the conventional theory of cosmic redshift, the present new physics does not present any difficulty to explain those observations. In addition, this physics still offers another interesting conclusion.

Wednesday, December 4, 2019

Cardiac Phsiology Essay Example For Students

Cardiac Phsiology Essay The study of cardio physiology was broken up into five distinct parts all centering on the cardiovascular system. The first lab was utilization of the electrocardiogram (ECG). This studied the electrical activities of the heart by placing electrodes on different parts of the skin. This results in a graph on calibrated paper of these activities. These graphs are useful in the diagnosis of heart disease and heart abnormalities. Alongside natural heart abnormalities are those induced by chemical substances. The electrocardiogram is useful in showing how these chemicals adjust the electrical impulses that it induces. The second part of this lab was a computer simulation program to illustrate a frogs electrocardiogram using various drugs in an isolated setting. The computer program entitled Effects of Drugs on the Frog Heart allowed experimental conditions to be set for specific drugs.The different drugs used were calcium, digitalis, pilocarpine, atropine, potassium, epinephrine, caffeine , and nicotine. Each of these drugs caused a different electrocardiogram and beats per minute reading. The calcium-magnesium ration affects the permeability of the cell membrane(Fox). When calcium is placed directly on the heart it results in three physiological functions. The force of the heart increases while the cardiac rate decreases. It also causes the appearance of ectopic pacemakers in the ventricles, producing abnormal rhythms (Fox). Digitalis affect on the heart is very similar to that of calcium. It inhibits the sodium-potassium pump activated by ATP that promotes the uptake of extracellular calcium by the heart. This in return strengthens myocardial contraction (Springhouse). Pilocarpine on the other hand acts to decrease the heart rate. It achieves this by assisting in the release of acetylcholine from the vagus nerve. Atropine on the other hand block acetylcholine receptors thus decreasing cardiac rate. By placing potassium directly on the heart, its extracellular conce ntration increases thus decreasing the resting potential. This brings the resting potential closer to threshold and weakens myocardial contractions. Epinephrines action increases the strength of contraction and of the cardiac rate. Caffeine is a stimulant that also increases the strength of contraction and of the cardiac rate. It inhibits phosphodiesterase that breaks down cyclic AMP thus causing an increase in cAMP levels. Nicotine actively binds to the nicotinic receptors causing stimulation of the parasympathetic ganglia. This in returns slows the heart rate. By listening to chest one can hear the actual mechanical contraction of the heart. Upon the closure of the valves a lub can be heard and the semilunar valves shut a dub is heard. Using this technique, diagnosis of a heart murmur can be made. The relative opening of the foramen ovale can cause this condition. Adding a device known as a sphygmomanometer and listening to the brachial artery is how blood pressure is taken. Blood pressure is highly dependent on cardiac output and peripheral resistance. Cardiac output is the amount of blood pumped by the heart per minute. The resistance the blood receives flowing through the arterioles is peripheral resistance. As a result of this, blood pressure can be controlled by dilation and constriction of arterioles. Upon measuring blood pressure, on should be able to hear five phases of sound. These phases are:1. A loud clear tapping. 3.A loud thumping following the murmurs. In determining how fit we are a number of test can be used. This can include but is not limited to the ECG, blood pressure, and/or pulse rate. By taking the pulse under various conditions the maximum cardiac rate can be estimated. Trend wise, a non-athlete will reach their maximum cardiac output at a lower workload than an athlete. Although not completely accurate, this can be a very good indicator of fitness.In order to carry out the electrocardiogram experiment a number of materials needed to be obtained. Three disposable electrodes along with the electrode gel were needed. The BIOPAC program, Mac Computer, and the SS 2L lead (black, red, white) were used to collect data on the subject. The electrodes were connected to the body (skin). The black lead was placed on the anterior right leg just above the ankle joint. The same was done with the red lead expect placement was on the left leg. The white lead was placed on the right wrist just above the palm. After correct placement of the se electrodes, the SS 2L lead was connected to the CH 2 port. Lesson 3 was opened and the setup icon was clicked. After the setup as completed, record was clicked and the ECG recorded for 30 seconds. This was done while the subject was sitting relaxed. Using the I-beam tool, peak-to-peak measurements were taken. This value was the inter-beat interval. With that number, beat per minute was found (BPM = 60 / IBI). Essay On Telemachos EssayBibliography:The Parkinsons Institute. 29 Feb. 2000 Lieberman, Dr. National Parkinson Foundation, Inc. Copyright 1996-2000. 31 Mar. 2000Brady, John. Parkinsons Information. 1998. 13 Feb. 2000 Tuen, Charles M.D. Neuroland. 22 July 1998. 1 Apr. 2000