Perforating and ophthalmic artery variants from the anterior cerebral artery: Two case reports.

Background: The diagnosis and therapy during surgery depend largely on a full account of anatomic characteristics. Apart from regular structures, the common, less common or even uncommon anatomic variations are critical for procedural planning. This is especially true during craniocerebral microsurgery, where small vascular variations can affect the final surgical results and patient prognosis.

[Clinicopathological significance of homeobox gene BP1 mRNA expression in human breast cancer].

Background & Objective: Beta protein 1 (BP1) gene, a novel member of DLX homeobox gene family, is located in 17q21-22 region and overexpressed in both acute myeloid leukemia and acute T cell lymphocytic leukemia. However, the reports on the function of BP1 in solid tumors are rare. The study was designed to determine the expression of BP1 gene in breast cancer and to analyze its relationship with various clinicopathological factors.

[Study on the determination of manganese in the Polygonum multiflorum by flame atomic absorption spectrometry].

This paper presents a method for the determination of manganese in the organism of the Chinese herbal medicine of the Polygonum multiflorum. Manganese was complexes, extracted and determined by FAAS. The opimum condition of experiment was studied.

[Determination of bismuth pectin by flow-injection hydride-generation atomic absorption spectrometry].

A new method was developed by flow-injection hydride-generation atomic absorption spectrometry (FI-HG-AAS) for direct determination of bismuth in bismuth pectin, which is mostly composed of pectin and bismuth and serves as one of pharmaceuticals for protecting stomach mucous membrane. The influences of some experimental parameters of this method, such as the acidity of sample solution, the reductant of KBH4 and NaOH that served as the stabilizer of KBH4, were studied and these parameters were optimized. Bismuth was detected directly with the linear range of 0.

[Direct resolution of clenbuterol enantiomers with amide derivative as chiral stationary phase].

A simple and rapid high performance liquid chromatographic method has been developed for the direct resolution of clenbuterol enantiomers. The method involved the use of an amide type chiral stationary phase(CSP) made of (R)-1-naphthylglycine and 3,5-dinitrobenzoic acid known as the Chirex 3005 column. The effects of different contents of n-hexane, 1,2-dichloroethane and methanol in mobile phase on the chiral separation are discussed.