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Sulfur Compounds (6):
Recent article
Sulfur Compounds
Organic Letters (13)3 2011
Abstract
With two β-mercaptoethyl groups on the N, a tertiary amide of structure 1 is always poised for intramolecular thioesterification however it flips about the C-N bond. It is shown that a peptide with such a C-terminal N,N-bis(2-mercaptoethyl)-amide (BMEA) can be used directly for nati...
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PMID: 21175148
PDF is available here.
PDF is available here.
| < More recent | Older article > |
Organic Letters (13)3 2011
Abstract
With two β-mercaptoethyl groups on the N, a tertiary amide of structure 1 is always poised for intramolecular thioesterification however it flips about the C-N bond. It is shown that a peptide with such a C-terminal N,N-bis(2-mercaptoethyl)-amide (BMEA) can be used directly for nati...
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PMID: 21175148
PDF is available here.
PDF is available here.
Abstract
A new flow procedure for the preparation of arylsulfonyl chlorides from aniline starting materials is described. The reaction conditions are mild, requiring no added acid and are amenable to continuous flow processing, in a safe, easily scalable and less labour intensive way than the corresponding b...
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PMID: 20877783
PDF is available here.
PDF is available here.
Abstract
Mercury has various uses in nuclear fuel reprocessing and other nuclear processes, and so it is often present in radioactive and mixed (radioactive and hazardous) wastes. Compliance with air emission regulations such as the Hazardous Waste Combustor (HWC) Maximum Achievable Control Technology (MACT)...
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PMID: 21141428
PDF is available here.
PDF is available here.
Abstract
We have used different computational methods, including B3LYP, CCSD(T)-F12 and CBS-QB3, to study and compare the addition-elimination reaction of the nitrate radical NO(3) with four sulfur-containing species relevant to atmospheric chemistry: hydrogen sulfide (H(2)S), dimethyl sulfide [(CH(3))(2)S],...
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PMID: 20820564
PDF is available here.
PDF is available here.
Abstract
This paper analyzes the natural desulfurization process taking place in coal-fired units using Greek lignite. The dry scrubbing capability of Greek lignite appears to be extremely high under special conditions, which can make it possible for the units to operate within the legislative limits of sulf...
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PMID: 21090555
PDF is available here.
PDF is available here.
Abstract
The frequent presence of the sulfur-containing amide penangin (10) in leaf extracts of Glycosmis species turned out to be the result of decomposition of imides generated by extraction and storage in MeOH. Reinvestigation of Glycosmis mauritiana and G. cf. puberula with acetone revealed the presence...
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PMID: 20701297
PDF is available here.
PDF is available here.
Archives of Microbiology (192)7 2010
Abstract
Acidithiobacillus ferrooxidans is a mesophilic, acidophilic, chemolithoautotrophic bacterium that obtains energy from the oxidation of ferrous iron (Fe2+), elemental sulfur and reduced sulfur compounds. The industrial interest in A. ferrooxidans resides in its capacity to oxidize insoluble metal sul...
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PMID: 20480358
PDF is available here.
PDF is available here.
Abstract
33 subjects were enrolled and completed the study. The adjusted mean volatile sulfur compound (VSC) levels were significantly lower in the SnF2 groups than the NaF groups, at both 24 (P < 0.01) and 28 (P < 0.001) hours post baseline time points. Tongue brushing did not provide additional statistical...
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PMID: 20718217
PDF is available here.
PDF is available here.
Abstract
Epidemiological studies have clearly shown that whole-grain cereals can protect against obesity, diabetes, CVD and cancers. The specific effects of food structure (increased satiety, reduced transit time and glycaemic response), fibre (improved faecal bulking and satiety, viscosity and SCFA producti...
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PMID: 20565994
PDF is available here.
PDF is available here.
Abstract
The using of sonochemically prepared components for growth of SbI(3).3S(8) single crystals from the vapor phase is presented for the first time. The good optical quality of the obtained crystals is important because this material is valuable for optoelectronics due to its non-linear optical properti...
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PMID: 20171922
PDF is available here.
PDF is available here.
Abstract
Sulfur monobromide (S(2)Br(2)) was employed as a task-specific oxidant to capture and stabilize elemental mercury from coal-fired flue gas. Its performances on the removal of Hg(0) were investigated with respect to the gas-phase reaction and particle-involved reactions. It was found that the gas-pha...
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PMID: 20408537
PDF is available here.
PDF is available here.
Abstract
Novel reaction of tetranitromethane (TNM) with electrophilic alkenes in the presence of triethylamine yielding substituted 3-nitroisoxazoles was found and studied. Triethylamine increases the reactivity of TNM toward electrophilic alkenes promoting their heterocyclization, and the reactions proceed...
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PMID: 20384287
PDF is available here.
PDF is available here.
Abstract
1,2-bis(2-methylallyl)disulfane was synthesized from sodium sulfide and 3-chloro-2-methylpropylene. The structure of the target product was confirmed by GC-MS, 1H-NMR and elemental analysis. Cell viability assay, flow-cytometric analysis and protein expression results showed that 1,2-bis(2-methylall...
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PMID: 20657504
PDF is available here.
PDF is available here.
Abstract
Through the use of direct analysis in real time mass spectrometry (DART-MS), 2-propenesulfenic acid, an intermediate long postulated as being formed when garlic ( Allium sativum ) is crushed, has been detected for the first time and determined by mass spectrometric methods to have a half-life of <1...
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PMID: 20225897
PDF is available here.
PDF is available here.
Abstract
We hypothesized that oral malodor would be associated with enhanced proteolysis or deglycosylation in saliva. The purpose of this study was to evaluate properties of glycoproteins in saliva and assess their association with VSC levels. Subjects were 88 patients who visited "the Fresh Breath Clinic",...
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PMID: 20437763
PDF is available here.
PDF is available here.
Abstract
To determine the influence of oral status on halitosis, the relationship between halitosis and periodontopathic bacteria present in plaque on the tongue and the subgingival sulcus was examined in 62 periodontally healthy adults. Halitosis indicators used were the organoleptic score;...
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PMID: 20155507
PDF is available here.
PDF is available here.
Abstract
The seeds of Raphanus sativus L., known as Lai-fu-zi in traditional Chinese Medicine, are always roasted before clinical use for avoiding nausea. During an investigation of the chemical difference between roasted and pre-roasted products, two novel sulfur-containing compounds, which mainly existed i...
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PMID: 20390752
PDF is available here.
PDF is available here.
Odontology (98)1 2010
Abstract
To determine the influence of oral status on halitosis, the relationship between halitosis and periodontopathic bacteria present in plaque on the tongue and the subgingival sulcus was examined in 62 periodontally healthy adults. Halitosis indicators used were the organoleptic score;...
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PMID: 20155507
PDF is available here.
PDF is available here.
Odontology (98)1 2010
Abstract
To determine the influence of oral status on halitosis, the relationship between halitosis and periodontopathic bacteria present in plaque on the tongue and the subgingival sulcus was examined in 62 periodontally healthy adults. Halitosis indicators used were the organoleptic score;...
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PMID: 20155507
PDF is available here.
PDF is available here.
Pharmacology (85)3 2010
Abstract
The effect of a chronic (4 weeks) administration of sulphurous thermal water on gastric acid secretion and mucosal defense was investigated in rats. Animals were randomized to receive daily intake of tap water or of thermal water obtained from a local spa center (Tabiano, Parma, Italy). Rats were fo...
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PMID: 20145426
PDF is available here.
PDF is available here.
Abstract
The composition of aroma compounds of dry champignons (Agaricus bisporus L.) were identified using capillary gas chromatography and chromatography-mass spectrometry. In total, 56 compounds were identified. It was found that the flavor of dry mushrooms was formed by the volatile compounds produced as...
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PMID: 20198929
PDF is available here.
PDF is available here.
Abstract
Three treatments were tested to investigate the release concentrations of volatile organic compounds (VOCs) during the bio-drying of municipal solid waste (MSW) by the aerobic and combined hydrolytic-aerobic processes. Results showed that VOCs were largely released in the first 4 days of bio-drying...
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PMID: 20608513
PDF is available here.
PDF is available here.
Abstract
A new technology for isolation of medicinal balneological preparations from mineral waters has been developed. It is based on the extraction of biologically active compounds (BAC) from mineral waters with ethanol following oxidative hydrolysis and water vapour distillation. This technology has no an...
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PMID: 21086597
PDF is available here.
PDF is available here.
Abstract
Garlic is one of the world's oldest medicines that has been employed not only for flavouring but also as a medical herb for its prophylactic and therapeutic actions. Most garlics' beneficial effects are due to the presence of the organosulphate molecule allicin. Allicin is a highly unstable molecule...
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PMID: 21520707
PDF is available here.
PDF is available here.
Abstract
The first enantioselective syntheses of sulfur flavan-3-ol analogues 1-8 have been accomplished, whereby the oxygen atom of the pyran ring has been replaced by a sulfur atom. The key steps were: (a) Pd(0) catalyzed introduction of -S t-butyl group, (b) Sharpless enantioselective dihydroxylation of t...
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PMID: 20714315
PDF is available here.
PDF is available here.
Abstract
Five sulfur-containing flavor compounds were synthesized for the first time by the reaction of 4-ethyloctanoyl chloride with sulfur-containing alcohols or mercaptans. The synthesized compounds are 3-(methylthio)propyl 4-ethyloctanoate, 2-methyl-3-tetrahydro-furanthiol 4-ethyloctanoate, 4-methyl-5-th...
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PMID: 20714288
PDF is available here.
PDF is available here.
Abstract
The results demonstrated a higher biodesulfurization activity when the flavin reductase gene was transferred into recombinant P. putida harboring dszA,B,C. These results were approved by the Gibbs test and HPLC analysis. CONCLUSION: These analyses showed that this novel indigenous engineered P. puti...
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PMID: 19946346
PDF is available here.
PDF is available here.
Abstract
Novel methodology for the formation of amide bonds under neutral conditions is described. Evidence is presented that the active acyl donors are thio FCMA intermediates, generated from the reactions of thioacids with isonitriles.
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PMID: 19697932
PDF is available here.
PDF is available here.
Abstract
Calcium species in mineral aerosols collected simultaneously in Aksu (near the Taklimakan Desert), Qingdao (eastern China), and Tsukuba (Japan) during dust and nondust periods were determined using Ca K-edge X-ray absorption near-edge structure (XANES). From the fitting of XANES spectra, it was foun...
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PMID: 19764213
PDF is available here.
PDF is available here.
Abstract
We performed 20-ns explicit-solvent molecular dynamics simulations for three diastereomeric peptides with stereochemistries: LLLLL, LLLDL, and LDLDL. Experimentally LLLLL and LDLDL readily cyclize, whereas LLLDL cyclizes in low yield. Simulations at 310 K produced conformations with inter-terminal h...
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PMID: 19593648
PDF is available here.
PDF is available here.
Abstract
The effect of organo-sulfur compounds, including 1-propylmercaptan (PM), dimethyl disulfide (DMDS), diallyl disulfide (DADS), propyl disulfide (PDS), and 2,5-dimethylthiophene (DMT), on melanin formation was investigated. Among the selected five organo-sulfur compounds, PM displayed a significant in...
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PMID: 19610593
PDF is available here.
PDF is available here.
Abstract
We can use the active substances in Draeger tubes and related systems as catalysts. Analytes of interest inhibit the catalysts that leads to a large signal. The work presented here focuses on the detection of toxic sulfide compounds. Using NIBS, we observe that we can enhance the sensitivity of the...
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PMID: 19572707
PDF is available here.
PDF is available here.
Inorganic Chemistry (48)15 2009
Abstract
Dimeric (N(2)S)Ni complexes and the monomeric N(2)S(2) bismercaptodiazacycloheptane nickel complex, (bme-dach)Ni, serve as precursors to two N(2)-, N'-/ S- complexes where N(2) = diazacycloheptane, N' = imidazole and S = thiolate. As rare examples of nickel complexes containing a mixed thiolate/imid...
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PMID: 19572492
PDF is available here.
PDF is available here.
Journal of Chromatography B (877)20-21 2009
Abstract
Suitability of different types of pre-concentration (solid phase microextraction and sorbent trapping) and detection (flame photometric detector (FPD) and mass selective detector (MSD)) for gas chromatographic determination of sulphur-containing compounds (H2S, MeSH, EtSH, DMS, COS a...
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PMID: 19493705
PDF is available here.
PDF is available here.
Abstract
The experimental sulfur K-edge X-ray absorption near-edge structure (XANES) spectra of the amino acids cysteine, homocysteine, penicillamine, methionine, including the oxidation products methionine sulfoxide and the disulfide cystine, have been analyzed by transition potential DFT calculations. The...
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PMID: 19381417
PDF is available here.
PDF is available here.
Abstract
The physicochemical properties, pK(a), Log P and solubility of compound alpha, (5-chloro-2-(methylthio)-6-(1-naphthyloxy)-1H-benzimidazole), a new fasciolicide agent, were characterized using conventional methods. Also, its pharmacokinetics was evaluated in sheep and cattle. In both species an oral...
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PMID: 19290945
PDF is available here.
PDF is available here.
Abstract
The name of the chemical solution (divine water) or (sulfur water) is characterised by semantic ambiguity: the term theion means both "divine" and "sulfur," and Greek alchemists frequently play on this polysemy. This article analyses the use of this and similar expressions in the writings of pseudo-...
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PMID: 19831256
PDF is available here.
PDF is available here.
Abstract
Medicinal properties of garlic (Allium sativum) have been widely known and used since ancient times till the present. Garlic enhances immune functions and has antibacterial, antifungal and antivirus activities. It is known to prevent platelet aggregation, and to have hypotensive and cholesterol- and...
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PMID: 19253339
PDF is available here.
PDF is available here.
Sulphur-containing compounds in food plants: Kinetics, biological activity, and mechanisms of action
Abstract
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
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PMID: 19140750
PDF is available here.
PDF is available here.
Abstract
The scope and limitation of the ring-opening reaction of sulfonyl-activated aziridines using lithiated dithianes was investigated. Nucleophilic attack of lithiated dithianes on aziridines containing tert-butylsulfonyl (Bus) and 2-(trimethylsilyl)ethylsulfonyl (SES) demonstrated efficient ring cleava...
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PMID: 19156316
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
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PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
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PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
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PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
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PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
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PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
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PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
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PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
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PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
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PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
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PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
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PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
|
PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
|
PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
|
PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
|
PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
|
PMID: 19140750
PDF is available here.
PDF is available here.
Organic Letters (11)3 2009
Abstract
In the presence of a catalytic amount of RhH(PPh(3))(4) and 1,2-bis(diphenylposphino)ethane (dppe), alpha-phenylthio ketones were methylthiolated with p-cyano-alpha-methylthioacetophenone giving alpha-phenylthio-alpha-methylthio ketones. The methylthio transfer reaction between the k...
|
PMID: 19140750
PDF is available here.
PDF is available here.