A consistent feature of the Alpha-, Mu- and Pi-class glutathione transferases (GSTs) is the presence near the N-terminus of a tyrosine residue that contributes to the activation of glutathione. While this residue appears to be conserved in many Theta-class GSTs, its absence in some suggested that the Theta-class GSTs may have a significantly different structure or catalytic mechanism. The eluci...

Phase transition is a ubiquitous phenomenon in nature, science and technology. In general, the phase separation from a homogeneous phase depends on the depth of the temperature quench into the two-phase region. Earth's gravity masks the details of phase separation phenomena, which is why experiments were performed under weightlessness. Under such conditions, the pure fluid sulphur hexafluoride ...

Sulphur status of some soils in Edo Central, Nigeria was evaluated in five different locations; Ekpoma, Irrua, Uromi, Ubiaja and Agbede. The area lies within the derived savanna-forest transitional zone. Surface soil samples (0 – 15 cm) collected from the five localities wasanalyzed for their physico-chemical properties, inorganic, organic and total sulphur contents. Results showed that inorgan...

One of the research projects is concerned with the four-membered saturated inorganic ring system called cylcodiphosphazanes, which essen ally act as monoor bidentate ligands toward transi on metals. Deriva ves of cyclodiphosphazanes containing oxygen, sulphur, phosphorous or nitrogendonor-func onali es have shown versa le coordina on behaviour, resul ng in simple mononuclear to tri-, tetraor po...

5. The reaction kinetics of the hydrolytic decomposition of G2S2 and cystine in the presence of an excess of silver nitrate were studied under various conditions. The reactions were classified into three main types. 6. Acetate was shown to catalyse the reaction of cystine and, to a much lesser extent, that of. G2S2. Similarly, barbitone inhibited the cystine reaction completely, but that of G2S...

PURPOSE To compare the hemostatic effect of sulfur hexafluoride 20% (SF6 20%) with lactated Ringer's solution for prevention of early postoperative vitreous hemorrhage following diabetic vitrectomy. METHODS In a prospective randomized clinical trial, 50 eyes undergoing diabetic vitrectomy were divided into two groups. At the conclusion of surgery, in one group the vitreous cavity was filled w...

Introduction Sulfur hexafluoride (SF 6) gas is widely used in circuit breakers and gas-insulated substations, but its use presents safety and environmental challenges when maintenance is needed. Utilities using SF 6 gas have a variety of needs, including best practices for handling SF 6 , new tools for detecting and mitigating leaks, and information on assessing gas purity. In recent years, EPR...

für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namen...

BACKGROUND Current breath tests for measurement of gastric emptying of solids are expensive, possibly inaccurate, and require cumbersome calculations. AIMS We wished to validate a simplified solid gastric emptying test using a [(13)C]Spirulina platensis breath test for accurate results relative to scintigraphy. SUBJECTS Thirty healthy volunteers. METHODS We measured gastric emptying of eg...

Semilocal pseudopotentials are used in combination with a density-functional approximat ion for the correlation energy and special optimized basis sets to investigate the sulphur halides SF, SF 2 , SF 3 , FSSF, SSF 2 , SCI, SC12, C1SSC1 and SSC12. It turns out that the inclusion of d-orbitals in the basis set playes a significant role with respect to the quality of the calculated molecular para...