The Middle-Lower Yangtze River Valley Belt (MLYRB) in South China contains many stratabound Fe-Cu-Pb-Zn deposits hosted Middle-Upper Carboniferous carbonates. origin and nature of the ore fluids are poorly constrained (syngenetic vs. epigenetic). Trace elements sulfur isotope compositions sphalerite galena from Qixiashan carbonate-hosted Pb-Zn deposit (Eastern MLYRB) help to clarify ore-fluid s...

BACKGROUND The EORTC clinical trial 20901, activated in 1990, was designed to treat non-Hodgkin's lymphomas (NHL) of intermediate/high-grade malignancy according to the Working Formulation. Established in 1994, the R.E.A.L. Classification on NHL has now replaced all former classifications. PATIENTS AND METHODS We reanalysed all cases (n = 273) documented by material available for review accor...

The characterization of Mg-clays in rock samples (well P1) from the Barra Velha Formation (Early Cretaceous) allowed establishment mineral assemblages on basis their kerolite and Mg-smectite (stevensite saponite) content. Kerolite-rich (A B) rarely contain saponite. Assemblage B is composed kerolite-stevensite mixed layers, while assemblage A consists more than 95% kerolite. Mg-smectite-rich (C...

The vascular stem-cell tissue known as procambium generates phloem cells on one side and xylem cells on the other. The Arabidopsis PXY gene encodes a leucine-rich repeat receptor-like kinase that is required for polar divisions of procambial cells.

A polyguanine/polycytosine (polyG/polyC) tract in the proximal promoter of the vascular endothelial growth factor (VEGF) gene is essential for transcriptional activation. The guanine-rich (G-rich) and cytosine-rich (C-rich) strands on this tract are shown to form specific secondary structures, characterized as G-quadruplexes and i-motifs, respectively. Mutational analysis of the G-rich strand c...

BACKGROUND Although there is considerable interest in the postprandial events involved in the absorption of dietary fats and the subsequent metabolism of diet-derived triacylglycerol-rich lipoproteins, little is known about the effects of meal fatty acids on the composition of these particles. OBJECTIVE We examined the effect of meal fatty acids on the lipid and apolipoprotein contents of tri...

Polyangium brachysporum sp. nov. strain ATCC 53080 produces a novel type of antifungal and antitumor antibiotic complex, glidobactins A, B and C. Enhanced production of minor components, glidobactins B and C, was achieved by medium modification. The addition of soybean oil or corn oil, which are rich in unsaturated C18 fatty acids, to the fermentation medium led to an increased production of co...

Little is known of the molecular basis for the diversity of microtubule structure and function found within the eukaryotic flagellum. Antibodies that discriminate between tyrosinated alpha tubulin and post-translationally detyrosinated alpha tubulin were used to localize these complementary tubulin isoforms in flagella of the single-celled green alga Chlamydomonas reinhardtii. Immunofluorescenc...