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[en] The scope of homogeneous Lewis acid-catalyzed benzo[N,N]-heterocyclic condensation was expanded to include the use of various metal salts not reported in the literature and SnCl2·2H2O was finally selected. Among various solid supports activated with SnCl2, heterogeneous SnCl2/SiO2 proved to be the most effective and significantly higher conversions were achieved compared to SnCl2·2H2O itself. The results of TG-DTA and BET indicated that dispersed SnCl2 coordinates with surface hydroxyl groups of silica leading to formation of stable Lewis acid sites. Low catalyst loading, operational simplicity, practicability and applicability to various substrates render this eco-friendly approach as an interesting alternative to previously applied procedures
Journal
Bulletin of the Korean Chemical Society; ISSN 0253-2964; 
; v. 32(1); p. 213-218
; v. 32(1); p. 213-218
[en] The study of the labelling of planaria with sup(99m)Tc shows that the incorporation of radioactivity in this platyhelminth increases with an increase in SnCl sub(2) concentration from 0.13 to 1.3 μM, reaching a plateau in the range of 1.3-130 μM them decreasing with 1300 μM. At concentrations of 1.3 and 13 μM SnCl sub(2), a stronger binding of sup(99m)Tc was obtained. The biological viability of the labelled planaria was not altered when the described methodology was used. The advantage of this new labelling technique is that it is possible to obtain a platyhjelminth preparation labelled with a radionuclide that is very cheap, is easily available and is a gamma emitter with a photon energy of 140 KeV. (author)
Journal
Revista Brasileira de Pesquisas Medicas e Biologicas; ISSN 0034-7310; ; CODEN RBPMB; v. 22(6); p. 787-789
; CODEN RBPMB; v. 22(6); p. 787-789
[en] Shoved that influence of compound of clastforming component deduced that chloric reagent interactive not only with definitive elements but also with compounds that basing a clast
Journal
Doklady Akademii Nauk Respubliki Tajikistan; ISSN 0002-3469; ; CODEN DANTAL; v. XLVII(1-2); p. 61-67
; CODEN DANTAL; v. XLVII(1-2); p. 61-67
No abstract available
Journal
Australian and New Zealand Journal of Medicine; ISSN 0004-8291; ; v. 14(6)
; v. 14(6)
No abstract available
Journal
Ciencia e Cultura; ISSN 0009-6725; ; v. 33(7); p. 331
; v. 33(7); p. 331
[en] 3-Amino-2-quinoxalincarbonitrile 1,4-dioxide (AQCD) is a quinoxaline derivative, which was synthesized by condensation method. AQCD was labeled with 99mTc with labeling yield above 90% investigated by paper chromatography. 99mTc-AQCD was prepared using stannous chloride as reducing agent at pH 7 and 10 min reaction time. 99mTc-AQCD should be freshly prepared, otherwise the yield significantly decreased after 15 min post labeling. Stability study of 99mTc-AQCD reflected the short time stability of Biodistribution study of 99mTc-AQCD in tumor bearing mice reflected that its uptake in tumor sites in both ascites and solid tumor sites. This uptake of 99mTc-AQCD in tumor sites was sufficient to radioimage the inoculated sites. (author)
Journal
Journal of Radioanalytical and Nuclear Chemistry; ISSN 0236-5731; ; CODEN JRNCDM; v. 285(2); p. 169-175
; CODEN JRNCDM; v. 285(2); p. 169-175
No abstract available
Journal
Radiologia Diagnostica; ISSN 0033-8354; ; v. 26(1); p. 158-159
; v. 26(1); p. 158-159
[en] A simple technique for the preparation of sup(99m) Tc labeled red blood cells using a comercial kit is described. To each 3ml of plain blood with anti-coagulant was added 1ml of solution of commercial kit with 6.8 μg of stannous chloride. This mixture was incubated in water bath, at 370C, for 60 minutes. Then technetium-99m was added and the mixture was left for another ten minutes, in water bath, at 370C. Under these conditions there was the best labeling of the red blood cells. Similar results were obtained with a solution of stannous chloride prepared freshly. The labeling is strong for 6.8 μg stannous chloride because the labeling was not removed by the several washes of the red blood cells or by the left in water bath. (Author)
[pt]
Descreve-se uma tecnica simples de preparacao de celulas sanguineas vermelhas marcadas com sup(99m) Tc usando um estojo comercial. A cada 3 ml de sangue livre com anti-coagulante foi adicionado 1 ml de solucao do estojo comercial com 6.8 μg de cloreto estanhoso. Esta mistur foi incubada num banho de agua a 370C por 60 minutos. Adicionou-se tecnecio 99m e a mistura foi deixada por mais 10 minutos no banho de agua a 370C. Sob essas condicoes houve a melhor marcacao das celulas sanguineas vermelhas. Resultados similares foram obtidos com uma solucao de cloreto estanhoso preparado recentemente. A marcacao e forte para 6.8 μg de cloreto estanhoso devido ao fato da marcacao nao ter sido removida pelas varias lavagens das celulas sanguineas vermelhas ou por ter sido deixada no banho de agua. (E.G.)Journal
Arquivos de Biologia e Tecnologia; ISSN 0365-0979; ; v. 26(4); p. 455-461
; v. 26(4); p. 455-461
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