Reference

Determination of the concentration of maltose- and starch-like compounds in drinking water by growth measurements with a well-defined strain of a Flavobacterium species

Determination of the concentration of maltose- and starch-like compounds in drinking water by growth measurements with a well-defined strain of a Flavobacterium species. Van der Kooij, D.; Hijnen, W. A. M. (Netherlands Waterworks' Test. Res. Inst., KIWA Ltd., Rijswijk 2280 AB, Neth.). Appl. Environ. Microbiol., 49(4), 765-71 (English) 1985. CODEN: AEMIDF. ISSN: 0099-2240. DOCUMENT TYPE: Journal CA Section: 61 (Water) Section cross-reference(s): 10 The growth kinetics of Flavobacterium strain S12 specialized in the utilization of glycerol [56-81-5], and a no. of oligo- and polysaccharides were detd. in batch-culture expts. at 15° in pasteurized tap water supplied with very low amts. of substrates. Kss for the growth on maltotriose [1109-28-0], maltotetraose [34612-38-9], maltopentaose [34620-76-3], and maltohexanose [34620-77-4] were ￡0.03 mM and below those for glucose [50-99-7] (1.5 mM) and maltose [69-79-4] (0.16 mM). KsS for starch [9005-25-8], amylose [9005-82-7] and amylopectin [9037-22-3] were 8.4, 25.6, and 11.0 mg C/L, resp. A yield of 2.3 ′ 107 CFU/mg C on the oligo- and polysaccharides was calcd. from the linear relationships obsd. between max. colony counts in pasteurized tap water and the concns. (usually <25 mgC/L) of supplied compds. The max. colony counts of strain S12 grown in various types of raw water and tap water revealed that raw water contained only a few micrograms of maltose- and starch-like compds. per L; in tap water the concns. were all <1 mg C and usually <0.1 mgC/L. The application of starch-based coagulant aids gave increased concns. of maltose- and starch-like compds. in the water during treatment, but these concns. were greatly reduced by coagulation and sedimentation, rapid sand filtration, and slow sand filtration.

Capillary gels formed by spatially progressive polymerization using migrating initiator

Capillary gels formed by spatially progressive polymerization using migrating initiator. Novotny, Milos V.; Dolnik, Vladislav; Cobb, Kelly A. (Indiana University Foundation, USA). U.S. US 5080771 A 14 Jan 1992, 9 pp. (United States of America). CODEN: USXXAM. CLASS: ICM: C25B001-00. ICS: C25B007-00; B01D057-02; B01D061-42. NCL: 204182800. APPLICATION: US 90-603983 26 Oct 1990. DOCUMENT TYPE: Patent CA Section: 80 (Organic Analytical Chemistry) Gels are formed in capillary tubes by electrophoretically drawing a charged polymn. initiator into a capillary tube pre-filled with monomer, crosslinking agent and catalyst. The rate of travel of the initiator is slow enough to maintain a sharp leading edge or front, thereby causing polymn.There are some commonly used reagents with their cas registry numbers 34620-78-5 and 34620-77-4 in this article. to occur in a progressive manner from one end of the capillary to the other. The shrinkage inherent in the polymn. reaction is thus compensated by fluid movement ahead of the traveling initiator front, and discontinuities in the gel which would otherwise be formed are avoided. .