Liquid Nitrogen Liquid nitrogen is nitrogen in a liquid state at a very low temperature. Its chemical formula is N2. Manufacturing of Liquid Nitrogen Liquid nitrogen is made by cooling and compressing air straight from the atmosphere. The type used to produce large amounts of liquid nitrogen looks vastly different but really happens is that air squashed and cooled . When you squash it‚ air molecules are forced closer together. If you also cool it down the molecules can slow down enough to
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mineral nutrients‚ and none is more important than nitrogen‚ which is required in large amounts as an essential component of proteins‚ nucleic acids and other cellular constituents. There is an abundant supply of nitrogen in the earth’s atmosphere - nearly 79% in the form of N2 gas. However‚ N2 is unavailable for use by most organisms because there is a triple bond between the two nitrogen atoms‚ making the molecule almost inert. In order for nitrogen to be used for growth it must be "fixed" (combined)
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Different pollutants released from the vehicles would cause different impacts to the human body. The first one is Nitrogen oxides (NOx). When the fuels are burning at a very high temperature combined with the electric sparks in the vehicles causing the nitrogen and oxygen in the atmosphere combined together but then the formation of nitrogen oxide will react with the oxygen to form nitrogen dioxide(NO2) rapidly. If people inhaled a low level of NO2‚ the gas will irritate your eyes‚ nose‚ throat‚ and
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Evergreen Do we as humans only live to die? One can’t understand the life of another‚ unless he/she has experienced that life first hand. People don’t realize that we (humans) are all playing the same role in life. William Shakespeare brilliantly clarifies the true meaning of life through his poem “All the worlds a stage.” Truth of life‚ destiny‚ and human ambition can be seen more clearly through theater than from life itself. The most elaborate themes from the poem are: the fact of all people
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Nitrogen Family (The traditional name for the elements in Nitrogen’s column‚ the “pnictogens”‚ comes from a Greek word for “choking” or “strangling”) P.7 Nitrogen: Fritz Haber discovered how to convert the Nitrogen in the air into an industrial product. Although nitrogen gas can suffocate those who are unsuspecting‚ tends to be benign‚ almost to the point of uselessness. The one important thing it can do is replenish the soil; it is as important to plants as vitamin c is to us. When pitcher
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BCR : the importance of nitrogen . I suspect that your instructor had some elements that he/she explained were critical to "a Well Designed Investigation." If I were you‚ I would get those out to start with so that you can make sure that you include all in your answer. 1. Probably they include negatives and‚ if possible‚ positive controls. Is your negative control a test plant that is planted in a pot with no legume planted in the pot? Do you have any other negative controls? How about positive
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zero (-459 degrees Fahrenheit‚ 0 degrees Kelvin‚ -273 degrees Celsius) to liquid nitrogen temperatures (-321 F‚ 77 K‚ -196 C)‚ they have no electrical resistance. The temperature at which electrical resistance is zero is called the critical temperature (Tc) and varies with the individual material. For practical purposes‚ critical temperatures are achieved by cooling materials with either liquid helium or liquid nitrogen. The following table shows the critical temperatures of various superconductors:
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Other nitrogen containing compounds Catecholamine: Dopamine‚ norepinephrine (noradrenaline) and epinephrine (adrenaline) are biologically active amines and are collectively called as Catecholamine. * Dopamine and norepinephrine functions as neurotransmitters. Outside the nervous system‚ norepinephrine and its methylated derivative‚ epinephrine regulates carbohydrate and lipid metabolism. They are released from storage vehicles in the adrenal medulla in response to stress (fright‚ exercise‚ cold
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Fixing the Global Nitrogen Problem The primary issue of the nitrogen problem is to inform people how nitrogen effects the environment negatively. All living things need nitrogen and approximately 78 percent of the atmosphere contains nitrogen. However‚ nitrogen is the non-reactive gas that is known as inert‚ and can commonly be fixed with nitrogen fixation. Nitrogen fixation refers to the natural process by breaking the triple bond between two pairs of nitrogen atoms through a tiny group
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Symbiotic Nitrogen Fixation 1. Rhizobium - Legume Symbiosis Many leguminous plant species can enter into a symbiotic relationship with root-nodule bacteria‚ collectively referred to as rhizobia. The legumes belong to the order Fabales‚ family Leguminosae (alternatively Fabaceae)‚ in eurosid clade I (Doyle and Luckow 2003). Traditionally‚ three main subfamilies are distinguished: Caesalpinoidae‚ Mimosoidae and Papilionidae. Only one nonlegume‚ the woody plant Parasponia sp.‚ can be nodulated
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