We present new data of oxygen isotopes in marine sulfate ( δ 18 O SO4 ) in pore fluid profiles through organic-rich deep-sea sediments from 11 ODP sites around the world. In almost all sites studied sulfate is depleted with depth, through both organic matter oxidation and anaerobic methane oxidation. The δ 18 O SO4 increases rapidly near the top of the sediments, from seawater values of 9‰ to m...

Functional evaluation of chemically modified human erythrocytes has led to the proposal that amino acid residue E681 of the band 3 anion exchanger AE1 lies on the anion translocation pathway and is a proton carrier required for H+/SO4(2-) cotransport. We have tested in Xenopus oocytes the functional consequences of mutations in the corresponding residue E699 of mouse AE1. Most mutations tested ...

representation of the dimeric units of K2[Zr(SO4)3]. 2H20. Examination of this structure shows that breaking and remaking one oxygen bridge in each dimeric ring of K2[Zr(SO4)3.2H20 would result in the formation of infinite-Zr-O-SO -Zr-chains similar to those found in Na2[Zr(SO4)3]. 3H20 [Fig. 3(c)] and we see that in these two compounds we have an extension of the structural arrangements alread...

Bu çalışmanın amacı Arsuz Ovası topraklarının tuzluluk ve alkalilik ile ilgili özelliklerinin belirlenmesi topraklarda değişebilir sodyum oranı (ESR) adsorpsiyon (SAR) arasındaki ilişkilerin incelenmesidir. Çalışmada ovası 0-30 cm derinliğinden 37 adet bozulmuş toprak örneği alınmıştır. Alınan örneklerinde; pH, elektriksel iletkenlik (EC), (Na) potasyum (K), katyon değişim kapasitesi (KDK), eri...

This research aims to assess the hydrogeochemical evolution of groundwater in Oued souf valley for drinking and irrigation purposes. To achieve this, 49 samples from complex terminal were examined treated concurrently with multivariate statistical methods, geostatistical modeling WQI (water quality index). Focusing on physico-chemical parameters, Q mode clustering analysis detected four major w...

NaLa(SO4)2,H2O crystalline powder was obtained under hydrothermal conditions at 220°C. A coupled TGA/DTA experiment of exhibits a weight loss 260°C corresponding to the dehydration and an endothermal peak 774°C. To elucidate transformation mechanism as function temperature, single crystals have been grown 80°C, 300 800°C. For each phase, isolated structure determination performed. As already pu...

A sustainable catalyst for the selective oxidation of benzyl alcohol (BnOH) to benzaldehyde (BzH) was developed by mineralizing Ti(SO4)2 on graphene oxide foam (GOF) surface. The Ti(SO4)2/GOF was characterized by scanning electron microscopy (SEM), energy disperse spectroscopy (EDS), X-ray diffraction (XRD), solid-state NMR (SSNMR), thermal gravimetric analysis (TGA), infrared (IR) and BET anal...

A controlled new oxidant sulfate radical anion (SO4(·-)) was found and it can be easily prepared by mixing Na2S2O4 and TBHP with stirring. In this new metal-free oxidation system (Na2S2O4/TBHP), SO4(·-) can be used as a controllable oxidant to oxidize various aromatic alcohols to the corresponding aldehydes in good yields without any acid formation at room temperature. SO4(·-) was determined by...

The aim of this study is to assess the water quality surface body in area (Ikpoba River) Benin City using Geographic Information System (GIS). present research involved spatial analysis for four stations along Ikpoba River City. were delineated satellite images Google Earth. At same time, samples collected at these and parameters such as Temperature, Turbidity, pH, Total Dissolved solids (TDS),...