Satellite-derived retrievals of precipitation have increased in availability and improved in quality over the last decade. There are now several satellites in orbit with instruments capable of precipitation retrieval with various degrees of accuracy, spatial resolution and temporal sampling. These retrievals have the advantage of almost full global coverage when compared to surface gauges and g...

in this study chemical method of dissolution-precipitation was applied to produce amorphous silica nanoparticles from rice straw ash (rsa), the waste material of rice cultivation. the morphology, particle size, structure and area of specific surface of synthesized amorphous silica nanoparticles were evaluated using transmission electron microscopy (tem), x-ray diffraction analysis (xrd) and bet...

OBJECTIVE To compare direct-measured HDL cholesterol with HDL cholesterol measured by a precipitation method. RESEARCH DESIGN AND METHODS We compared a homogeneous assay for direct HDL cholesterol analysis with the phosphotungstic acid magnesium chloride precipitation method in 55 type 1 diabetic patients, 70 type 2 diabetic patients, and 82 nondiabetic normal control subjects with plasma tri...

This work was undertaken to measure background silver in Illinois precipitation in the absence of any known seeding operations in or near Illinois. The overall rainfall-weighted mean concentration at several stations was 73 ng/liter. This is somewhat higher than has been found in unseeded precipitation in the western United States, but probably not high enough to preclude identification of silv...

Precipitation over the last 3800 years has been reconstructed using modern pollen calibration and precipitation data. A transfer function was then performed via the linear method of partial least squares. By calculating precipitation anomalies, it is estimated that precipitation deficits were greater than surpluses, reaching 21% and <9%, respectively. The period from 50 BC to 800 AD was the dri...

BACKGROUND High-performance liquid chromatography-tandem mass spectrometric (LC-MS/MS)1 analysis of plasma free metanephrines is the most diagnostically sensitive and specific screening test for the diagnosis of pheochromocytoma. We sought to develop an in-house method for this expensive test METHODS We used off-line isopropanol protein precipitation of plasma to remove interfering substances...

A series of comparative studies on the chemical and biological characterizations of the ovine lutropin subunits and their recombinants prepared by a countercurrent distribution (CCD) procedure and a salt precipitation method is presented. The salt precipitation Method B (0.1 M acetate and 3 M NaCl) gave a low yield of pure subunits and the subunits thus prepared recombined poorly to form a prod...

In the present work, Al2O3-CeO2 composite nanopowders were synthesized via co-precipitation method. The sinterability of the synthesized powders was investigated. The results showed that the transformation of transition phases of alumina to α-Al2O3 takes place at 1200 °C. TEM images showed that the powders was composed of nanoparticles in the range of 30−70 nm. The densification of composites s...

BETH BURNSIDE, CHRIS KOZAK, and F. C. KAFATOS. From the Marine Biological Laboratory, Woods Hole, Massachusetts 02543 . Dr . Burnside's present address is the Department of Anatomy, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104 . Dr . Kozak's present address is the Department of Biology, Yale University, New Haven, Connecticut 06520 . Dr. Kafatos' present addr...

−Highly loaded and dispersed Pt/C catalysts, used as cathodic electrocatalysts in low temperature fuel cells, were prepared using a new method involving the slow addition of a Pt precursor to a solution containing dispersed carbon powder and a reducing agent. During this process, the added Pt precursor was reduced instantaneously into fine particles and adsorbed onto the carbon surface in the s...