Heuvelink‚ E.‚ 1987. Influence of light on the growth of young tomato‚ cucumber and sweet pepper plants in the greenhouse: effects on relative growth rate‚ net assimilation rate and leaf area ratio. Scientia Hortic.‚ 31: 161-174. Tomato‚ cucumber and sweet pepper were sown in a greenhouse at regular intervals throughout the year. A relationship between the relative growth rate (RGR) of these young plants and the mean daily light integral ( PAR incoming per unit ground area) could be calculated for
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skin cells when needed . Stem cells are characterized by their ability to divide itself to renew and also divide to form different types of cells‚ for example‚ the stem cells of the skin can configure the stem cells of the skin and also specialized cells make specific function such as the formation of melanin. Why stem cells are important for our health? When we are sick or exposed to the injury of our cells are also damaged or
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Stem Cell Research: A Moral and Ethical Debate Stem Cell Research A Moral and Ethical Debate Imagine your life at the age of 32. It is as perfect as you could have ever imagined it. You are married with three beautiful children; two girls and a boy. Your oldest daughter is complaining of stumbling and clumsiness‚ so you take her to the doctor. You are devastated to learn that she‚ along with your other two children‚ have a neurological disorder called Batten Disease. This is a rare
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Should Embryonic Stem-Cell Research Be Banned? In recent times‚ there is a great deal of controversy surrounding stem-cell research. Some say that it will contribute substantially in curing diseases like cancer‚ Parkinson’s‚ Lou-Gehrig’s‚ etc while others claim that it violates the ethical and moral norms and principles of the society. Bills promoting stem-cell research have been vetoed several times‚ making it a political issue as well. However‚ stem-cell research should not be banned because
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Stem Cell Research Stem cell research has always been a controversial subject and will always be debated. The idea of taking a stem cell out of a baby that has not been born yet‚ and put in somebody else to save their life seems morally wrong to some people. Other people us playing god and altering his work to perfect our selves. But there are people that look at it and say is it both a miracle of science and see the future brighter than they did because of it. Stem cell research was started in
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ISOLATION AND CHARACTERIZATION OF A STEM CELL POPULATION FROM MENSTRUAL BLOOD [pic] Thesis submitted to The American University of Athens‚ to the Faculty of Science‚ in fulfillment of the requirements for Doctorate degree in Biomedical Science June 2011 Acknowledgements: This dissertation would not have been possible without the guidance and the help of several individuals who in one way or another contributed and extended their valuable assistance in the preparation and
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Embryonic Stem Cell Research is an important process that is already allowing scientists to test new drugs and figure out the cause of birth defects. The process is very delicate because scientists must work with a four to ten day old blastocyst to get the stem cells. They put the stem cells into a petri dish along with proteins and enzymes. The stew of cells‚ enzymes‚ and proteins is what helps regenerate the bad tissues that cause diseases. “Blastocysts can also potentially be created from a donor
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between embryonic stem cells and adult stem cells is that the embryonic stem cells are pluripotent stem cells that are from the inner cell mass of the blastocyst. Adult stem cells are undifferentiated cells and are found throughout the body. The adult stem cells are multiplied by cell division to replenish dying cells and revitalize damaged tissues. Totipotent cells are stem cells that are capable of giving rise to any type of cell or a full embryo. A pluripotent cell is a stem cell that can give
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composition of medium for the tissue culture is the most important key factor in the successful culture of plant cells. The medium should be accurately defined of inorganic and organic chemical additives so as to provide i) the nutrients for the survival of the plant cells‚ tissues and organs under culture and ii) the optimal physical condition of pH‚ osmotic pressure‚ etc. In the culture of plant cells formulating optimum type of medium favorable for in vitro culture was achieved many years ago
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What are the arguments for and against the use of stem cells in medicine? Stem cells – often referred to as “the building blocks of the human body” are like the basic ingredient needed in order to create a human being. This is why large amounts of stem cells can be found in early stage embryos in comparison to the adult human body where there are not as many present. Stem cells are “unspecialized” cells which have the potential to produce different types of specialist cells such as brain‚ muscle
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