Phosphonate

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  • The Importance Of Phosphites During WWII

    Where did phosphite come from? During WWII, rock phosphate was used as a white phosphorus incendiary and smoke screen. The shortage of rock phosphate concerned ag-officials and they began to look for alternative sources of phosphorus fertilizers. As a result, phosphonates were first considered as fertilizers in Germany and the United States during the 1930s and '40s. Rock phosphate is the beginning of most commercially made phosphorus products in the market today. Without the phosphate, many of our commercially available fertilizers cannot be made such as superphosphate and triple superphosphate. • RP + sulfuric acid = superphosphate • RP + phosphoric acid = Triple superphosphate (TSP) What do all the different terms mean? Phosphoric…

    Words: 1288 - Pages: 6
  • Bone Metastasis Essay

    At present a variety of [99mTc] based tracers are being used for skeletal metastasis diagnosis. Radiolabeled phosphonates are of an utmost interest in nuclear medicine for metastasis evaluation as well as for therapeutic application as many prevalent tumors are associated with metastasis. Bone targeting radiopharmaceuticals labeled with β emitters, administered systemically represents an acceptable adjuvant to external beam therapy for bone pain palliationin condition of osteoblastic bone…

    Words: 328 - Pages: 2
  • Summary Of Botulinum Toxin As A Biological Weapon

    α-Zirconium phosphate. Chemistry of Materials9: 863-870. Kwon, S. J., E. J. Jeong, Y. C. Yoo, C. Cai, G.- H. Yang, J. C. Lee, J. S. Dordick, R. J. Linhardt, and K. B. Lee (2014). High sensitivity detection of active Botulinum Neurotoxin by glyco-quantitative polymerase chain-reaction. Analytical Chemistry86: 2279-2284. Ladd, J., A. D. Taylor, J. Homola and S. Jing (2008). Detection of Botulinum Neurotoxins in buffer and honey using a surface plasmon resonance (SPR) sensor. Sensors and Actuators…

    Words: 1333 - Pages: 6
  • Advantages And Disadvantages Of Tri-O-Acetyloride

    and Reese, 1982; Sung, 1982; Huynh-Dinh et al., 1985). Further reaction with triazole gives S.5 (Figure 2.1.3). The purine nucleosides also react with electrophilic reagents. For example, guanine nucleosides react with MSNT to form the corresponding triazolo derivatives. Reaction of the N2-protected guanosine nucleoside S.6 with mesitylene sulfonyl chloride gives the crystalline O6-sulfonated derivative S.7 (Figure 2.1.4; Bridson et al., 1977; Francois et al., 1985). In the presence of pyridine,…

    Words: 1630 - Pages: 7
  • Informative Essay: The Importance Of Climate Change

    soil becomes vulnerable to to erosion, causing the soil water carrying capacity to decline. Some factors of soil degradation are deforestation, desertification/ overgrazing, irrigation, improper cultivation, and industrial farming. Chemical degradation is the loss of nutrients and/or organic matter in soil. Some effects of chemical degradation is salinization and acidification. Biological Degradation is the loss of organic matter and biodiversity in soil. It is caused by the usage of…

    Words: 1556 - Pages: 7
  • Nucleoside's Susceptibility To Depurination

    in solid-phase synthesis of oligonucleotides (Paul and Royappa, 1996). Depurination is faster at terminal sites than at internal sites in an oligonucleotide chain (Suzuki et al., 1994). Interestingly, a solution of 15% dichloroacetic acid (DCA) in methylene chloride was ideal as a detritylating reagent that induced minimal depurination compared to the traditionally used 2% DCA/methylene chloride. It is pertinent that with modern DNA synthesizers the pulsed delivery of reagents to the synthesis…

    Words: 1764 - Pages: 8
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