We report the rst detection of a hard power-law tail in the X-ray spectrum of the black hole candidate (BHC) binary X1755-338, which was observed in 1989 March-September during the TTM Galactic Centre survey. In addition, an ultrasoft thermal component with a temperature of 1:1 1:4 keV was also detected. We demonstrate that the soft and hard X-ray components of X1755-338 vary independently, as ...

Photosynthesis, Electron Transport, Chlorophyll Fluorescence, Photosystem II, BAS 13-338 Addition of BAS 13-338 (4-chloro-5-dim ethylam ino-2-phenyl-3(2H )-pyridazinone) to a sus­ pension of chloroplast thylakoids caused an increase in the / level o f chlorophyll fluorescence induction without affecting the F0 level and with a slight decrease in the Fmax level in a manner similar to the additio...

about 38% for females and 28% for males. In an ongoing study, mice are being fed rapamycin beginning at 270 days, with a significant increase in survival also being apparent in this cohort. Rapamycin was first identified as a natural product of the bacterium Streptomyces hygroscopicus in soil samples from Easter Island — famous for its impressive rock-carved human statues (Fig. 1). The compound...

Treatment of cytochrome P-450scc with fluorescein isothiocyanate (FITC) resulted in covalent labeling with 1.0 +/- 0.1 eq of FITC. Reverse-phase high performance liquid chromatography of tryptic and chymotryptic digests of the labeled protein revealed that a single FITC-labeled peptide accounted for 75% of the label. This peptide was found to be specifically labeled at lysine 338 by amino acid ...

At birth the newborn infant is required to make an abrupt adjustment to a new environment. Hitherto its existence has been parasitic and its needs have been supplied by the maternal organism. The most immediate dramatic changes required to support extra uterine life are concerned with respiration and the circulation. The infant must achieve a regular respiratory rhythm and be able to expand its...

Much of the existing conceptualization of fluid flow in karst aquifers is based on work in extensively cemented and recrystallized Paleozoic and Mesozoic carbonates. Within these aquifers, flow is often primarily through conduits (White 1969, 1977; Smart and Hobbs 1986; Ford and Williams 1989), although diffuse flow may occur through secondary porosity, such as fractures and joints (Shuster and...

MicroRNAs are small noncoding RNA species, some of which are playing important roles in cell differentiation. However, the level of participations of microRNAs in epithelial cell differentiation is largely unknown. Here, utilizing an epithelial differentiation model with T84 cells, we demonstrate that miR-338-3p and miR-451 contribute to the formation of epithelial basolateral polarity by facil...