منابع مشابه
Sulfur Compounds: Gas Chromatography
(tetrahydrofuran) at 703C for 16 h. The ester residue is then converted to a 6,6-dideuteriohexose residue, the O-methyl ethers of which are easily distinguishable by GC-MS of the derived alditol acetates. An alternative to acid hydrolysis that is applicable to most polysaccharides and glycoconjugates, including those containing acid-labile residues or glycosidic linkages resistant to hydrolysis...
متن کاملTriad and cyclic diad compounds of [60]fullerene with metallocenes.
Metallocene-bridged [60]fullerene triads and cyclised metallocene-[60]fullerene diads are formed via [3 + 2] cycloaddition reactions of [60]fullerene with metallocene dialdehyde and an amino acid. In the case of cyclic diads only one regioisomer is formed, as determined by UV-vis and NMR spectroscopic studies. These compounds have both electron donor (metallocene) and acceptor ([60]fullerene) c...
متن کاملUrinary sulfur compounds in Down syndrome.
internal standard (leucinol) was added. Separation was performed on a C18 Zorbax (Agilent Technologies) column [15 3 0.46 cm (i.d.)] using the following mobile phase: 450 mL/L acetonitrile in sodium acetate buffer (0.5 g/L) adjusted to a final pH of 6.1 with glacial acetic acid. The flow rate was 1.2 mL/min. The wavelengths for excitation and emission were 338 and 445 nm, respectively. The pati...
متن کاملSulfur-containing compounds from Clinacanthus siamensis.
Two new sulfur-containing compounds, trans-3-methylsulfonyl-2-propenol (1) and trans-3-methylsulfinyl-2-propenol (2) were isolated together with trans-3-methylthioacrylamide (3), entadamide A (4) and entadamide C (5) from the leaves of Clinacanthus siamensis. The structures were established on the basis of the spectroscopic data. The compounds were tested for antimalarial and antimycobacterial ...
متن کاملSulfur Compounds in Petroleum Hydrocarbon Streams
Determination of concentrations of sulfur compounds in different petroleum samples is a true analytical challenge. Only analytical procedures based on gas chromatography can meet the sensitivity and accuracy requirements dictated by up-to-date petroleum industry. The objective of this work is to develop the method for the quantifying of sulfur compounds in petroleum hydrocarbon streams. The opt...
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ژورنال
عنوان ژورنال: MATERIALS TRANSACTIONS
سال: 2002
ISSN: 1345-9678,1347-5320
DOI: 10.2320/matertrans.43.1530