Following the recovery of ACS with the side-2 electronics in July 2006, the temperature of the WFC detector was lowered from-77C to-80C in an effort to mitigate the impact of CTE and hot pixels. As predicted, the temperature change caused a slight loss in detector sensitivity. By using relative photometry of 47 Tuc before and after the temperature change, corrections to the WFC photometric zero...

an approach to recycle precious metals of cathode materials from spent lithium cobalt oxide batteries by using organic citric acid and hydrogen peroxide has been studied in this paper. the effects of molar ratio, solid-liquid ratio, reaction time and temperature on leaching efficiency of cobalt were investigated respectively. meanwhile the leaching kinetics equation of cobalt was established, a...

The aim of this study is to explore the capability of subcritical methanol to reduce the acidity of naphthenic acids and to determine reaction kinetics for large-scale reactor design.The experiments were carried out in a 25 mL autoclave reactor (China) at temperatures of 70-120oC, Methanol Partial Pressures (MPPs) of 0.1-1.5 MPa, and reaction times of 0-60 min. The total...

The aim of this study is to explore the capability of subcritical methanol to reduce the acidity of naphthenic acids and to determine reaction kinetics for large-scale reactor design.The experiments were carried out in a 25 mL autoclave reactor (China) at temperatures of 70-120oC, Methanol Partial Pressures (MPPs) of 0.1-1.5 MPa, and reaction times of 0-60 min. The total...

Abstract A phenoxy-imine proligand with the additional OH donor group, 4,6- t Bu 2 -2-(2-CH (OH)-C 6 H 4 N = CH)C 3 ( LH ), was synthesized and used to prepare group 5 complexes by reacting Ti(O i Pr) LTi ) VO(O LV ). All new compounds were characterized FTIR, 1 13 C NMR spectroscopy single-crystal X-ray diffraction analysis. The as catalysts in ring opening polymerization of ε-caprolactone. in...

A single metal atom stabilized on two dimensional materials (such as graphene and h-BN) exhibits extraordinary activity in the oxidation of CO. The oxidation of CO by molecular O2 on a single cobalt atom embedded in a hexagonal boron nitride monolayer (h-BN) is investigated using first-principles calculations with dispersion-correction. It is found that the single Co atom prefers to reside in a...

background: the present study was conducted in order to evaluate the effects of bilateral uterine artery ligation (bual) on the ovarian follicular fate, and alterations in carbohydrate, lipid, lipase and serum levels of f9sh, lh, prolactin, estrogen and progesterone. methods: twenty-four mature female rabbits divided into two test and control-sham groups. the animals underwent ovariohystrectomy...

Three main requirements influence the control of the temperatures of operating suites: (1) avoid humidities which contribute to the risks of anaesthetic explosions; (2) promote the comfort and working efficiency of the staff; and (3) conserve the patient's resources. In the United States, an air temperature of 70 to 75°F. (21 to 240C.) with 50 to 60% relative humidity provides a compromise betw...

A convenient, rapid, and one-pot method for the synthesis of azo dyes has been developed. In this protocol, diazotization reagent (ArN2+ -CrO3–SiO2) was prepared via grinding of aromatic amines, NaNO2, wet SiO2 and nano silica chromic acid (Nano-SCA) without solvent at room temperature. The obtained diazotization reagent was suff...