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3,464 Newest Publications about the topic sulfur

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Acyclic nucleoside thiophosphonates as potent inhibitors of HIV and HBV replication

03-Jul-2011 | Karine, Barral , Clément, Weck , Nadine, Payrot , Loic, Roux , Céline, Durafour , ..., European Journal of Medicinal Chemistry, 2011

9-[2-(Thiophosphonomethoxy)ethyl]adenine 3 and (R)-9-[2-(Thiophosphonomethoxy)propyl]adenine 4 were synthesized as the first thiophosphonate nucleosides bearing a sulfur atom at the α-position of the acyclic nucleoside phosphonates PMEA and PMPA. Thiophosphonates S-PMEA 3 and S-PMPA 4 were ...

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Synchrotron scanning photoemission microscopy of homogeneous and heterogeneous metal sulfide minerals

01-Jul-2011 | Robert George Acres; Sarah Louise Harmer; Hung Wei Shui; Chia‐Hao Chen; David Allan Beattie, Journal of Synchrotron Radiation, 2011

Scanning photoemission microscopy (SPEM) has been applied to the investigation of homogeneous and heterogeneous metal sulfide mineral surfaces. Three mineral samples were investigated: homogeneous chalcopyrite, heterogeneous chalcopyrite with bornite, and heterogeneous chalcopyrite with pyrite. ...

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Functionalised Silver Chalcogenide Clusters 

01-Jul-2011 | Langer, Robert; Breitung, Ben; Wünsche, Linda; Fenske, Dieter; Fuhr, Olaf, Zeitschrift für anorganische und allgemeine Chemie, 2011

Abstract Eight new silver chalcogenide clusters with different functional groups in the ligand shell were synthesised and characterised by single-crystal X-ray diffraction. The optical properties of the isostructural clusters [Ag6(S-C6H4-CN)6(PPh3)6] (1) and [Ag6(S-C6H4-NO2)6(PPh3)6] (2) are ...

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Catalytic Non‐Enzymatic Kinetic Resolution

01-Jul-2011 | Hélène Pellissier, Advanced Synthesis & Catalysis, 2011

Abstract While tremendous advances have been made in asymmetric synthesis, the resolution of racemates is still the most important industrial approach to the synthesis of chiral compounds. The use of enzymes for the kinetic resolution (KR) of racemic substrates to afford enantiopure compounds ...

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Highly Regio‐ and Stereoselective Iodohydroxylation of 1,2‐Allenylic Sulfoxides in the Presence of Benzyl Thiol

01-Jul-2011 | Minyan Wang; Chunling Fu; Shengming Ma, Advanced Synthesis & Catalysis, 2011

Abstract The iodohydroxylation of 1,2‐allenyl sulfoxides with iodine in the presence of benzyl thiol afforded 3‐hydroxy‐2‐iodo‐2(E)‐alkenyl sulfides in good yields and high regio‐ and stereoselectivities. In this reaction it was observed that the sulfoxide functionality was reduced to sulfide ...

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A thermodynamic study of the gaseous potassium chemistry in the convection sections of biomass fired boilers

01-Jul-2011 | Blomberg, T., Materials and Corrosion, 2011

Abstract Thermodynamic calculations of the gaseous potassium species in boiler flue gases are presented. Results show that if the K(g)/Cl(g) molar ratio is still higher than 1 after the K2SO4(s) aerosol formation at high gas temperatures, the excess potassium is in the form of KOH(g). ...

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High-Accuracy Theoretical Thermochemistry of Atmospherically Important Sulfur-Containing Molecules

30-Jun-2011 | Balázs Nagy; Péter Szakács; József Csontos; Zoltán Rolik; Gyula Tasi; Mihály Ka& ..., Journal of Physical Chemistry A, 2011

In this study, several sulfur-containing molecules with atmospherical importance were investigated by means of high-accuracy quantum chemical calculations including: HSO, HOS, HOSO2, HSNO, SH, CH2SO, CH2SH, S2COH, and SCSOH. After identifying the stable conformers of the molecules, a ...

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Electrical conductivity and structure of glasses in the Na2O-Na2S-P2O5 and Na2S-P2S5 systems

29-Jun-2011 | Glass Physics and Chemistry, 2011

Abstract The glasses, in which oxygen was partially replaced with sulfur, have been synthesized in the Na2O-P2O5-Na2S system. The chemical and chromatographic analyses of the glasses synthesized have been performed. The temperature-concentration dependences of electrical conductivity of the ...

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On the Dissolution Behavior of Sulfur in Ternary Silicate Slags

28-Jun-2011 | Youn-Bae Kang, Joo Hyun Park, Metallurgical and Materials Transactions B, 2011

Sulfur dissolution behavior, in terms of sulfide capacity (C S), in ternary silicate slags (molten oxide slags composed of MO – NO – SiO2, where M and N are Ca, Mn, Fe, and Mg), is discussed based on available experimental data. Composition dependence of the sulfur dissolution, at least in the ...

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Structure and conformation of Arg8 vasopressin modified analogs

28-Jun-2011 | Edyta Podstawka‐Proniewicz; Dariusz Sobolewski; Adam Prahl; Younkyoo Kim; Leonard M. Proniewicz, Journal of Raman Spectroscopy, 2011

Abstract Fourier‐transform Raman and infrared spectra were acquired for four arginine vasopressin (AVP) analogs containing L‐diphenylalanine (Dpa): [Dpa2]AVP, [Cpa1,Dpa2]AVP, [Dpa3]AVP, and [Cpa1,Dpa3]AVP (where Cpa denotes 1‐mercaptocyclohexaneacetic acid). We compared and analyzed these ...

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