scholarly journals Enhance Low Level Temperature and Moisture profiles through Combining NUCAPS, ABI observations and RTMA analysis

2021 ◽  
Author(s):  
Zheng Ma ◽  
Zhenglong Li ◽  
Jun Li ◽  
Timothy J. Schmit ◽  
Lidia Cucurull ◽  
...  
Keyword(s):  
Low Level ◽  
Moisture Profiles

scholarly journals Sensitivity of Axisymmetric Tropical Cyclone Spinup Time to Dry Air Aloft

2016 ◽  
Vol 73 (11) ◽  
pp. 4269-4287 ◽  
Author(s):  
Brian H. Tang ◽  
Rosimar Rios-Berrios ◽  
Joshua J. Alland ◽  
Jeremy D. Berman ◽  
Kristen L. Corbosiero
Keyword(s):  
Tropical Cyclone ◽  
Kinetic Energy ◽  
Mass Flux ◽  
Deep Convection ◽  
Radial Pressure ◽  
Moisture Profile ◽  
High Entropy ◽  
Low Level ◽  
Cumulus Congestus ◽  
Moisture Profiles

Abstract The sensitivity of tropical cyclone spinup time to the initial entropy deficit of the troposphere is examined in an axisymmetric hurricane model. Larger initial entropy deficits correspond to less moisture above the initial lifting condensation level of a subcloud-layer parcel. The spinup time is quantified in terms of thresholds of integrated horizontal kinetic energy within a radius of 300 km and below a height of 1.5 km. The spinup time increases sublinearly with increasing entropy deficit, indicating the greatest sensitivity lies with initial moisture profiles closer to saturation. As the moisture profile approaches saturation, there is a large increase in the low-level, area-averaged, vertical mass flux over the spinup period because of the predominance of deep convection. Higher entropy deficit experiments have a greater amount of cumulus congestus and reduced vertical mass flux over a longer duration. Consequently, the secondary circulation takes longer to build upward, and the radial influx of angular momentum is reduced. There is also a reduction in the conversion of potential available enthalpy to horizontal kinetic energy, as a result of reduced flow down the radial pressure gradient early in the spinup period. Later in the spinup period, the low-level vortex spins up relatively quickly near the nascent radius of maximum wind in the high-entropy deficit experiments, whereas the low-level vortex spins up over a wider area in the low-entropy deficit experiments.

Tryptophan-Niacin Metabolism in Rat with Puromycin Aminonucleoside-Induced Nephrosis

2006 ◽  
Vol 76 (1) ◽  
pp. 28-33 ◽  
Author(s):  
Yukari Egashira ◽  
Shin Nagaki ◽  
Hiroo Sanada
Keyword(s):  
Body Weight ◽  
Urinary Excretion ◽  
Enzyme Activities ◽  
Treated Group ◽  
Control Group ◽  
Puromycin Aminonucleoside ◽  
Low Level ◽  
Key Enzyme

We investigated the change of tryptophan-niacin metabolism in rats with puromycin aminonucleoside PAN-induced nephrosis, the mechanisms responsible for their change of urinary excretion of nicotinamide and its metabolites, and the role of the kidney in tryptophan-niacin conversion. PAN-treated rats were intraperitoneally injected once with a 1.0% (w/v) solution of PAN at a dose of 100 mg/kg body weight. The collection of 24-hour urine was conducted 8 days after PAN injection. Daily urinary excretion of nicotinamide and its metabolites, liver and blood NAD, and key enzyme activities of tryptophan-niacin metabolism were determined. In PAN-treated rats, the sum of urinary excretion of nicotinamide and its metabolites was significantly lower compared with controls. The kidneyα-amino-β-carboxymuconate-ε-semialdehyde decarboxylase (ACMSD) activity in the PAN-treated group was significantly decreased by 50%, compared with the control group. Although kidney ACMSD activity was reduced, the conversion of tryptophan to niacin tended to be lower in the PAN-treated rats. A decrease in urinary excretion of niacin and the conversion of tryptophan to niacin in nephrotic rats may contribute to a low level of blood tryptophan. The role of kidney ACMSD activity may be minimal concerning tryptophan-niacin conversion under this experimental condition.

Low-level lead exposure: Are there harmful effects?

1983 ◽  
Vol 28 (1) ◽  
pp. 79-79
Author(s):  
Claire B. Ernhart
Keyword(s):  
Lead Exposure ◽  
Low Level ◽  
Harmful Effects

SOME COMMENTS ON THE DISPLAY OF CARTOGRAPHIC INFORMATION FOR VERY LOW LEVEL FLIGHT.

1967 ◽  
Author(s):  
ROBERT H. WRIGHT
Keyword(s):  
Low Level ◽  
Level Flight

Evaluating Performance Effects of Low-Level Inhalation Exposure to Nerve Agents in Rats

2004 ◽  
Author(s):  
Raymond F. Genovese ◽  
◽  
Sara J. Shippee ◽  
Jessica Bonnell ◽  
Bernard J. Benton ◽  
...  
Keyword(s):  
Inhalation Exposure ◽  
Nerve Agents ◽  
Low Level ◽  
Performance Effects

NASP re-entry profile: Effects of low-level +gz on reaction time, keypad entry, and reach error.

1992 ◽  
Author(s):  
Kathy McCloskey ◽  
William B. Albery ◽  
Greg Zehner ◽  
Stephen D. Bolia
Keyword(s):  
Reaction Time ◽  
Low Level

Classification of Low Level Jobs: A Research Scale

1969 ◽  
Author(s):  
Paul Ries ◽  
Edward Pomeroy
Keyword(s):  
Low Level

Making decisions about the processing of persons with serious mental disorder arrested for low-level offenses within the criminal justice system

2002 ◽  
Author(s):  
Colleen Gillespie ◽  
John Billings ◽  
Beth Weitzman ◽  
Sue A. Kaplan
Keyword(s):  
Criminal Justice ◽  
Mental Disorder ◽  
Criminal Justice System ◽  
Justice System ◽  
Low Level
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