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1993 (1)
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1Author    R. Alf Steudel, Angela Albertsen, M. Onika Kustos, Joachim PickardtRequires cookie*
 Title    X-Ray Structural Analysis and Vibrational Spectra of Sodium Cysteine-S-sulfonate, +H3N C H (C 0 0 )CH 2S 20 3Na -3 /2 H 20 [1]  
 Abstract    The title com pound crystallizes orthorhombically (space group C 222,) with a = 797.0, b = 870.3 and c = 2739.0 pm. The anions are zwitterions which are heavily involved in intra-and intermolecular NH --O and OH -O hydrogen bonding. The two types o f sodium cations are coordinated by six oxygen atoms each o f which belongs to either S 0 3 groups (N a 2) or water molecules and S 0 3 groups (N a l). A second type o f water molecules is not coordinated to the cations. The SS bond length is 208.2 pm. Infrared and Raman spectra o f the title com pound are reported and tentatively assigned. The SS stretching vibration is observed at 409 cm -1. 
  Reference    Z. Naturforsch. 48b, 555—560 (1993); received July 23 1992 
  Published    1993 
  Keywords    Cysteine, S-Sulfonate, Structure, Spectra, Hydrogen Bonds 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0555.pdf 
 Identifier    ZNB-1993-48b-0555 
 Volume    48 
2Author    Jashovam Shani, P.H D, Shimon Benita, P.H D, MuhamedA. Bdulrazik, M. D., A. Haron Yerushalmi, P.H DRequires cookie*
 Title    Efficacy of Sustained-Release Radioprotective Drugs in vivo  
 Abstract    In previous publications from this laboratory we suggested the use of radioprotective drugs in a sustained-release fo rm as a practical way to cope with their high toxicity and quick metabolism and excretion. Cysteine and cysteamine, well-established radioprotectants, were used as model drugs and compressed at various concentrations (0—65%) into an insoluble tablet matrix, composed of ethylcellulose and stearic acid at various ratios and compression pressures. We demonstrated in vitro that when the release rate of the radioprotectants was measured under nitrogen, the kinetic data conformed with the Higuchi square root of time equation, indicating that the release of both drugs correlates with Higuchi's diffusional mechanism. In the present in vivo study, tablets con­ taining cysteine or cysteamine in a slow-release matrix were implanted, into the stomachs of female rats. The rats were irradiated at various time intervals up to 12 h after implantation and their survival recorded daily. Utilizing a 1:3 ratio of ethylcellulose: stearic acid as a matrix, the protective effect of the drugs was remarkable eight hours after tablet implantation. The results reported indicate that slow-release tablet formulation is a possible method for delivering of radioprotective drugs over an extended period of time. 
  Reference    Z. Naturforsch. 42c, 1323—1327 (1987); received May 14 1987 
  Published    1987 
  Keywords    Radioprotectants, Cysteine, Cysteamine, Tablet Matrix, Slow-Release 
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 TEI-XML for    default:Reihe_C/42/ZNC-1987-42c-1323.pdf 
 Identifier    ZNC-1987-42c-1323 
 Volume    42 
3Author    EvaBenedikt Lüönd, Hans-Peter Köst, Wolfhart RüdigerRequires cookie*
 Title    Isolation and Synthesis of New Bile Pigments Possibly Related to the Biosynthesis of the Phycocyanin Chromophore  
 Abstract    After incubation with 5-aminolevulinic acid and cysteine or 5-amino-levulinic acid and glutathione, Cyanidium caldarium excreted two new bile pigments 1 and 2. Their structures are identified by spectroscopical methods. By chemical addition of cysteine, glutathione and hy­ drogen sulfide to the ethyliden double bond of ZT-phycocyanobilin, the bile pigments 3-6 were obtained. 
  Reference    Z. Naturforsch. 45c, 1099—1110 (1990); received September 12 1990 
  Published    1990 
  Keywords    Cyanidium caldarium, Phycocyanobilin, Thiol Adducts, Cysteine, Glutathione 
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 TEI-XML for    default:Reihe_C/45/ZNC-1990-45c-1099.pdf 
 Identifier    ZNC-1990-45c-1099 
 Volume    45