نتایج جستجو برای: phenyl boron and potassium excess
تعداد نتایج: 16853487 فیلتر نتایج به سال:
As a result of the boron refining process, the Rio Tinto Borax site in California has experienced boron contamination, leading to desertification and the loss of local vegetation. Increasing industrial demand for the energy reduction ability of boron promotes continued mining. As such, the development of an effective and low-cost method for long-term reclamation is important. To establish this ...
IT has been shown in a previous paper (Cumings, 1939b) that the potassium content of muscle was abnormal in two diseases, except for conditions in which fat or fibrous tissue replacement of muscle occurs. Some further muscles from a variety of diseases have since been examined and the results have not given rise to any change of opinion. It has also been shown (Cumings, 1939b, 1940) that muscle...
The discovery of microbial metabolites—macrotetrolides, siderochromes and boromycin—is reviewed. The structures of these and related compounds provide instructuve examples of how Nature has solved the problem of cornplexing certain rarer elements, such as potassium, iron and boron. The common structural features of these highly specific, natural complexing agents are briefly discussed. It was e...
The title compound, C19H17BF3P {alternative name: triphen-yl[(tri-fluoro-boran-yl)meth-yl]phosphanium}, was formed by the reaction of tri-phenyl-phosphine with potassium iodo-methyl-tri-fluoro-borate. The mol-ecule features a nearly staggered conformation along the P-C bond and a less than staggered conformation along the C-B bond. In the crystal, weak C-H⋯F hydrogen bonds between the meta-phen...
Boron is a micronutrient that plays an important role in plant cell wall biosynthesis. Nevertheless, an excess of boron in the soil causes severe damage to the respiratory tissue of the plant. In Arabidopsis thaliana, the Atbor1 gene encodes a boron transporter that distributes this element throughout the plant. A cDNA sequence encoding a bor1 transporter was isolated from a Eucalyptus globulus...
Stockfors, J., Linder, S., & Aronsson, A. 1997. Effects of stand age, long-term fertilisation and growth on micronutrient status in Norway spruce trees. Studia Forestalia Suecica 202. 15 pp. ISSN 0039-3150. ISBN 91-576-5399-2. Effects of fertilisation treatments (amounts and composition) on needle concentrations of micronutrients (boron, copper, iron, manganese and zinc), were studied in a long...
in this paper, new (2e, 2'e)-3, 3'-(((3- hydroxypropane-1, 2-diyl) bis (oxy)) bis (2, 1-phenylene)) bis (1-phenylprop-2-en-1-one) (2a) was prepared in good yield by condensation reaction of acetophenone with bisaldehyde (1a) in ethanolic naoh solutions at room temperature. the (2e, 2'e)-3, 3'-(((3- hydroxypropane-1, 2-diyl) bis (oxy)) bis (2, 1-phenylene)) bis (1-phenylprop-...
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