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Toplam kayıt 25, listelenen: 11-20
Determination of trace metals in geological samples by atomic absorption spectrophotometry after preconcentration by Aspergillus niger immobilized on sepiolite
(Japan Soc Analytical Chem, 1999)
A method for the determination of Cu, Zn, Fe, Ni and Cd in geological samples by flame atomic absorption spectrophotometry (FAAS) after preconcentrating by Aspergillus niger immobilized on sepiolite has been developed. The ...
β-galactosidase immobilization into poly(hydroxyethyl methacrylate) membrane and performance in a continuous system
(Wiley-Blackwell, 1999)
The activity of beta-galactosidase immobilized into a poly(2-hydroxyethyl methacrylate) (pHEMA) membrane increased from 1.5 to 10.8 U/g pHEMA upon increase in enzyme loading. The K-m values for the free and the entrapped ...
A study on spiders (Araneae) in grass tussocks in van vicinity
(1999)
In April, July and December 1994, grass tussocks were collected from a delta located between cereal fields, and spiders were investigated. A total of 2257 spiders, 1314 insects, and 693 other invertebrates were extracted ...
3,3-dichloro-1,4-diphenylazetidin-2-one
(Munksgaard Int Publ Ltd, 1999)
In the crystal structure of the title compound, C15H11C12NO, the Cl-C-Cl plane is nearly perpendicular to the four-membered beta-lactam ring [89.0 (2)degrees] and the C-C bond distances in this group are 1.571 (6) and 1.543 ...
Tautomeric properties, conformations and structure of N-(2-hydroxy-5-chlorophenyl) salicylaldimine
(Elsevier Science Bv, 1999)
The crystal structure of N-(2-hydroxy-5-chlorophenyl) salicylaldimine (C13H10NO2Cl) was determined by X-ray analysis. It crystallizes orthorhombic space group P2(1)2(1)2(1) with a = 12.967(2) Angstrom, b = 14.438(3) Angstrom, ...
Biosorption of inorganic mercury and alkylmercury species on to Phanerochaete chrysosporium mycelium
(Elsevier Sci Ltd, 1999)
The biosorption of inorganic mercury (HgCl2), methyl mercury (CH3HgCl) and ethyl mercury (C2H5HgCl) onto the dry biomass of Phanerochaete chryosponum was studied from aqueous media which concentrations in the range of 5-500 ...
Van yöresi ot kümelerinde örümcekler (Araneae) üzerine bir araştırma
(1999)
1994 yılının nisan, temmuz ve aralık aylarında, tahıl tarlaları arasında yer alan bir deltadan ot kümeleri toplanmış ve örümcekleri incelenmiştir. Juncus inflexus , Agrostis stolonifera, Puccinella distans ve Alopecurus ...
3,3-Dichloro-1-(p-chlorophenyl)4-(p-methoxyphenyl)-2-azetidinone
(Wiley-Blackwell, 1999)
The crystal structure of the title compound, C16H12Cl3NO2, has a nearly planar beta-lactam ring with the N atom out of the best plane by 0.032(2) Angstrom. The C-C bond distances in the beta-lactam ring are 1.544(4) and ...
3,9-dimethyl-1,11-diphenyl-4,8-diaza-undecane-1,11-dione dihydrate
(Munksgaard Int Publ Ltd, 1999)
The title compound, C23H26N2O2. 2H(2)O, displays strong intramolecular N-H ... O [2.637(2) Angstrom] and intermolecular O-H ... O [2.763(4) and 2.842(3) Angstrom] hydrogen bonds within each salicylideneimine unit and water ...