1. The single station diel oxygen curve method was used to determine the response of system metabolism to backfilling of a flood control canal and restoration of flow through the historic river channel of the Kissimmee River, a sub-tropical, low gradient, blackwater river in central Florida, U.S.A. Gross primary productivity (GPP), community respiration (CR), the ratio of GPP/CR (P/R) and net d...

Various simplifications of the river water quality model no. 1 are applied to data sets from the river Glatt in Switzerland. In a first application, the biomass responsible for nitrogen and oxygen conversion processes is quantified based on known reaeration rates, measured concentrations of ammonia, nitrite and oxygen and assumed growth parameters of algae and bacteria. In a second application,...

A rapid deenergization procedure was used to probe the regulation of in situ adenylate deaminase and 5'-nucleotldase in isolated adult rat heart cells. In cells depleted of ATP, the rate of inosine monophosphate (IMP) production was fourfold greater in cells that had been respiring prior to deenergization than in cells that had been maintaining ATP stores through anaerobic glycolysis. This effe...

Responses of isolated adult rat heart cells to conditions that emphasize various aspects of ischemia have been evaluated. Cells maintained in hypoxic media with limited substrate deteriorate more rapidly than aerobic controls supplemented with glucose. Two distinct irreversible pathways for cell alteration can be distinguished as follows: (1) continued anaerobic aging in the absence of glucose ...

Rembagan River is the main tributary of Bedadung in Cangkring Village, Patrang District, Jember Region. Various community activities area such as bathing, washing, defecating and urinating well agricultural will produce domestic waste. These wast can cause river water pollution, especially quality degradation. then research needs to be done an analysis capacity receiving pollution costs. The pu...

We have studied the morphology of nuclei in Drosophila embryos during the syncytial blastoderm stages. Nuclei in living embryos were viewed with differential interference-contrast optics; in addition, both isolated nuclei and fixed preparations of whole embryos were examined after staining with a DNA-specific fluorescent dye. We find that: (a) The nuclear volumes increase dramatically during in...

Wind-driven surficial oxygen transfer into stationary water bodies has become increasingly important because the fate of many pollutants in these water bodies is strongly influenced by oxygen mass transfer. There are many existing correlations that can be used for predicting wind-driven surficial oxygen transfer; however, the actual prediction has been difficult because there are large variatio...

In acute lung injury (ALI), pressure support ventilation (PSV) may improve oxygenation compared with pressure-controlled ventilation (PCV), and benefit from random variation of pressure support (noisy PSV). We investigated the effects of PCV, PSV, and noisy PSV on gas exchange as well as the distribution of lung aeration and perfusion in 12 pigs with ALI induced by saline lung lavage in supine ...

Objectives: To assess the impact of urban city Patna on water quality river Ganga during pre and post COVID-19 lockdown. Method: A study is done to point nonpoint source pollution at different reaches for years 2017 2020 (at a stretch 40 km in lower plains). total 450 datasets have been collected from eight locations two major drains. The equations deoxygenation reaeration coefficient used mode...

BACKGROUND Experimental and clinical studies have shown reduction in intrapulmonary shunt with improved oxygenation by spontaneous breathing with airway pressure release ventilation (APRV) in acute lung injury. The mechanisms of these findings are not clear. The authors hypothesized that spontaneous breathing results in better aeration of lung tissue and that improvement in oxygenation can be e...