A common approach in resolving enantiomers of chiral basic drugs by capillary electrophoresis (CE) is to use cyclodextrins (especially their anionic derivatives) as chiral selector in the acidic buffer (pH ≤ 3) in normal or reversed (carrier) mode. Then, some organic modifiers are added to the buffer solution if the resolution is not satisfactory. In case of cetirizine (CTN), applying the same ...

A common approach in resolving enantiomers of chiral basic drugs by capillary electrophoresis (CE) is to use cyclodextrins (especially their anionic derivatives) as chiral selector in the acidic buffer (pH ≤ 3) in normal or reversed (carrier) mode. Then, some organic modifiers are added to the buffer solution if the resolution is not satisfactory. In case of cetirizine (CTN), applying the same ...

The configurational relationship of dextro-methylethyl carbinol to dextro-lactic acid has been established.’ The establishment of the relationship of the higher members of the homologous series of alcohols to the same reference substance will permit the correlation of the configurations of the alcohols among themselves. The present paper contains a report on the results of the efforts in this d...

Stereoisomerism describes those compounds which have the same molecular formula and chemical structure, but the atoms are orientated in a different direction. There are two isomers, each a mirror image of the other, called enantiomers. They are also called optical isomers because they rotate the plane of polarised light either to the right referred to as +, dextro, d or D isomer, or to the left...

In general, much greater doses of local anesthetics are required to produce cardiovascular (CV) toxicity than CNS toxicity. Similar to CNS toxicity, potency for CV toxicity reflects the anesthetic potency of the agent. Recent attention has focused on the apparently exceptional cardiotoxicity of the more potent, more lipid-soluble agents (bupivacaine, levo-bupivacaine, etidocaine, ropivacaine). ...

482 August 2013 AA science of laws of physics— the motion of gases, of constrict and expand. Theories of heat and pressure, dilate and contract. A stitch of needles and threads, often in acid excess. Volumes of breath, more or less. Power of flows, highs or lows. Choice of dextro and levo, same yet de novo. A science of alpha and beta, support or oppose. A medley of surge and collapse. An art o...

The conditions required for production of levo 2,3-butylene glycol by Bacillus polymyxa from citrus molasses were studied. Starter cultures required acclimatization to the substrate prior to inoculation of the fermentation medium. Maximal production of butylene glycol with minimal residual sugar was obtained with a medium consisting of molasses, diluted to 20 degrees Brix, and 0.4% urea. Optima...

Background. Enterobacteriaceae play an important role in the pathogenesis of hospital infections worldwide. The Tigecycline Evaluation Surveillance Trial (TEST) examines the susceptibility of pathogens isolated from multiple infectious processes from patients in geographically diverse populations. With the increase of antimicrobial resistance, continued surveillance and susceptibility testing o...