A new polyether antibiotic, lonomycin, was isolated from the culture of Streptomyces ribosidifcus strain TM-481. The antibiotic obtained as a sodium salt is a colorless prism having a molecular formula of C44H75O14Na(M.W. 850), m.p. 188 approximately 189 degrees C, and has no absorption maxima in the ultraviolet region. The infrared and NMR spectra of the antibiotic suggest the presence of a ca...

1512 CLINICAL CHEMISTRY, Vol. 25, No. 8, 1979 brano, T., Colorimetric determination of serum cholinesterase and its genetic variants by the propionylthiocholine-dithiobis(nitrobenzoic acid) procedure. Selected Methods Clin. Chem. 8,41-46 (1977). 5. King, J., Studies on human serum cholinesterases. Ph.D. thesis, University of Glasgow, 1974. 6. Garry, P. J., Serum cholinesterase variants: Examina...

The complexes of divalent Cobalt with bis(2,6-diacetyl pyridine monoxime)1,2-diiminobenzene have been prepared separately in presence of respective salts. The general molecular formula of the complexes have been found to be [Co(L)]X2 where L=Bis(2,6-diacetyl pyridine monoxime)1,2-di-iminobenzene, X=chloride, bromide, sulphate, perchlorate, nitrate, acetate ions, On the characterisation of the c...

Abstract Natural organic matter plays an important role in oceanic hydrothermal systems through a combination of geological and chemical processes. However, identifying the pathways compounds is still quite limited, preventing us from understanding how transformed systems. In this study, we focus on reaction alkenes, which represent key functional group intermediate linking most abundant hydroc...

Presently lithium hexafluorophosphate (LiPF6) is the dominant Li-salt used in commercial rechargeable lithium-ion batteries (LIBs) based on a graphite anode and a 3–4 V cathode material. While LiPF6 is not the ideal Li-salt for every important electrolyte property, it has a uniquely suitable combination of properties (temperature range, passivation, conductivity, etc.) rendering it the overall ...

A family of chiral triazolium salts has been developed for inducing the asymmetric intramolecular Stetter reaction. The use of an aminoindanol-derived catalyst affords optimal results, with the product keto esters formed in 82-97% ee and very good chemical yield. Aromatic and aliphatic aldehydes are equally competent substrates for this reaction. The reaction conditions are reasonably mild and ...

The use of chemical agents as clarification and decolorising aids i~ order to obtain ~lower coloured A-sugar have been Investigated. The chemicals tested include bentonite sulphur dioxide and some sulphurous acid salts. Colour lev~ el~ i~ variou~ factory products have been surveyed. From this information, together with that obtained in specific decolorising tests, an attempt has been made at an...

Solubility of Lithium Salts Formed on the Lithium-Ion Battery Negative Electrode Surface in Organic Solvents Ken Tasaki,* Alex Goldberg, Jian-Jie Lian, Merry Walker, Adam Timmons, and Stephen J. Harris* Mitsubishi Chemical USA, Redondo Beach, California 90277, USA Accelrys Software, Incorporated, San Diego, California 92121, USA General Motors Research and Development Center, Warren, Michigan 4...

In the present study we examined the performance of a thermoalkalophilic bacterial consortium, where the predominant strain was Bacillus sp. SF, in the degradation of Reactive Black 5 (RB5). We used a reactor working in continuous mode and investigated the effects of pH, hydraulic retention time (HRT) and several added salts on colour and chemical oxygen demand (COD) reductions. For the chosen ...

Three chiral α-(nonafluoro-tert-butoxy)carboxylic acids (R)-1, (RS)-2, (R)-3 were synthesized to examine their application as chiral solvating agents with amines. As a model compound, first (S)- and/or (RS)-α-phenylethylamine was used, and their diastereomeric salts were investigated by (1)H and (19)F NMR and ECD spectroscopy. The NMR spectroscopic studies were carried out at room temperature u...