Characterization and deactivation of sulfided red mud used as hydrogenation catalyst

Ngày tải lên: 23/09/2012, 14:46

... slaughterhouse was sheared into pieces and immediately immersed in liquid nitrogen. One hundred milligrams of heart tissue was picked up and milled into powder in liquid nitrogen, which was then used to ... n-de- cyl-b-d-maltoside was selected as the detergent for cry- stallization, and n-nonyl-b-d-maltoside as the additive. Another important factor for crystallization of com-...

Ngày tải lên: 19/02/2014, 02:20

... the diversity and utility of the pool of available a-conotoxins. Their identification andcharacterizationdependonasuiteoftechniques with increasing emphasis on mass spectrometry and micro- scale ... conopeptide analysis and characterization is by no means trivial, and often optimization on a case-by-case basis is required [14]. Sample amounts may be limiting even with the enhance...

Ngày tải lên: 19/02/2014, 12:20

... groups, and depolymerases. The latter can be classified into lyases (b-elimination) and hydrolases [2]. All hydrolases involved in degradation of pectin are classified as members of family 28 of the ... glycoside hydrolases, including the endopolygalacturonases, exo- polygalacturonases and rhamnogalacturonases [3,4]. Although a handful of endopolygalacturonases, gener- ally of...

Ngày tải lên: 20/02/2014, 03:20

... activity was measured with the indicated free Ca 2+ concentrations. The amount of cytosolic protein included in the assay was 32 lg per reaction and the amount of membrane protein was 0.4 lg ... pattern and extent of stimulation of the membrane and soluble yeast PtdEtn- PLD activity by Ca 2+ and their inhibition by other divalent cations is highly comparable. The mechanism of...

Ngày tải lên: 22/02/2014, 07:20

... and MLR Models . . . . . 205 9.5 Prediction of OFA Concentration in VOOs Using FTIR andMLR 208 9.5.1 Description of FTIR Spectra and Construction of Data Matrices and MLR Models . . . . . . . . ... comprising 0.2 and 1.3 % of total fatty acids, respectively. Their present in an olive oil is an index of low quality (Mariani and Fedeli 1985). For this reason, their determina...

Ngày tải lên: 07/03/2014, 21:20

... metal- loproteinases, acetylcholinesterases (AChEs), l-amino acid oxidases, nucleotidases (5¢-nucleotidases, ATPases, phosphodiesterases and DNases) and hyaluronidases. In most cases, snake venoms ... acetylcholinesterase, as well as doing the overall compilation and formatting of the manuscript. AV and ST prepared the sections on l-amino acid oxi- dase and snake venom metallo...

Ngày tải lên: 14/03/2014, 22:20

... adding 1 mL of 0.2 m NaOH, the tubes were centrifuged at 16 000 g for 1 min and 1 mL of the supernatant was recovered for measurement of A 405 . A calibration curve for phosphatase activity assays ... two subclasses: subclass IIA and subclass IIB [10]. Presently,  2000 sequences are assigned to HAD subfamily IIA, which covers humans and other eukary- otes, as well as Gram-pos...

Ngày tải lên: 14/03/2014, 23:20

... investigated. The rate of hydrolysis of GTPcNH 2 bound to Ras protein lay between the rates found for Ras-bound GTPcS and GppNHp, while Ras-catalysed hydrolysis of GTPcF was almost as fast as for GTP. The ... spectroscopic and structural studies was tested by formation of the complex between RasGTPcNH 2 and the Ras-binding domain of the Ras effector protein c-Raf-1. MATERI...

Ngày tải lên: 18/03/2014, 01:20

... Effect of divalent metal ions on the ATPase activity of M. tuberculosis ClpC1 and its deletion mutants. ATPase activity of proteins was assayed as described and effect of various divalent ions was ... aggregation of luciferase (Fig. 6C). There was some aggregation of ClpC1 and ClpC1D2in the presence of ATP at 43 °C (Fig. 6D). However, a very rapid and high aggregation...

Ngày tải lên: 23/03/2014, 06:20