A standard table for predicting equilibrium dissolved oxygen concentrations in Salt Lakes dominated by sodium chloride

1992 ◽  
Vol 1 (1) ◽  
pp. 1-6 ◽  
Author(s):  
J. E. Sherwood ◽  
F. Stagnitti ◽  
M. J. Kokkinn ◽  
W. D. Williams
Keyword(s):  
Sodium Chloride ◽  
Dissolved Oxygen ◽  
Salt Lakes ◽  
Standard Table ◽  
Oxygen Concentrations

A New Life for the St. Croix River

1988 ◽  
Vol 23 (4) ◽  
pp. 568-577
Author(s):  
Harold S. Bailey
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Discharge Rate ◽  
Paper Mill ◽  
Regulated River ◽  
Secondary Treatment ◽  
Pulp And Paper Mill ◽  
Oxygen Regime ◽  
Oxygen Concentrations

Abstract The water quality of the upper 110 kilometres of the St. Croix River is considered to be pristine. A major industrial discharge renders the lower 14 kilometres of the river a water quality limited segment. Prior to 1970 the Georgia-Pacific Pulp and Paper Mill at Woodland, Maine, discharged untreated effluent directly into the river causing dissolved oxygen concentrations to drop well below 5 mg/L, the objective chosen in the interest of restoring endemic fish populations. Since 1972, the Mill has installed primary and secondary treatment, regulated river discharge rate and effluent composition which has greatly improved the summer dissolved oxygen regime. By 1980, dissolved oxygen concentrations were generally above 5.0 mg/L and restocking the river with Atlantic Salmon (Salmo salar) was initiated.

Enhanced human lysozyme production by Pichia pastoris via periodic glycerol and dissolved oxygen concentrations control

2021 ◽  
Vol 105 (3) ◽  
pp. 1041-1050
Author(s):  
Luqiang Jia ◽  
Teng Li ◽  
Yixuan Wu ◽  
Chunsen Wu ◽  
Huaxiang Li ◽  
...  
Keyword(s):  
Pichia Pastoris ◽  
Dissolved Oxygen ◽  
Human Lysozyme ◽  
Oxygen Concentrations

Hypoxic tolerance of Chinese black sleeper Bostrichthys sinensis embryos at heartbeat stage

2006 ◽  
Vol 86 (6) ◽  
pp. 1473-1476 ◽  
Author(s):  
Shixi Chen ◽  
Wanshu Hong ◽  
Wei Zhou ◽  
Qiyong Zhang
Keyword(s):  
Dissolved Oxygen ◽  
Exposure Time ◽  
Hypoxic Conditions ◽  
Hypoxic Tolerance ◽  
Heartbeat Rate ◽  
Bostrichthys Sinensis ◽  
Oxygen Concentrations

Tolerance of hypoxia in Chinese black sleeper (Bostrichthys sinensis) embryos at heartbeat stage was examined at different oxygen concentrations. Embryonic response to hypoxic conditions was expressed in terms of the intensity of variation in heartbeat rate (V). Exposure of the embryos at 25°C to 0.5, 1.0 and 1.5 mg/l dissolved oxygen (DO), caused bradycardia, which was developed within the first 10 min of hypoxia, followed by a plateau, and lasted until termination of the hypoxia. The V values were significantly affected by DO concentrations (P<0.01). Exposure of the embryos to 0.2 mg/l DO at 25°C caused a periodic heartbeat (including a period of heartbeat and a period of silence). This phenomenon was first recorded in the present study. During the period of heartbeat, the heartbeat rates were faster at first (147±5 beats per min), and then decreased gradually until the period of silence. As the exposure time increased, the duration of heartbeat was prolonged significantly from 43.4±2.4 second to 126.2±8.2 second (P<0.01), and the duration of silence was also prolonged significantly from 68.0±5.5 second to 247.9±11.5 second (P<0.01). At the beginning of exposure, the primary heartbeat rates displayed tachycardia, and their V values were significantly lower than the V values of average heartbeat rates (P<0.05). However, the V values were not significantly different between primary heartbeat rate and average heartbeat rate after 90 min exposure (P>0.05).

Limnology of Lake Buchanan, a tropical saline lake, and associated pools, of North Queensland

1987 ◽  
Vol 38 (6) ◽  
pp. 877
Author(s):  
BV Timms
Keyword(s):  
Sodium Chloride ◽  
Saline Lake ◽  
Late Summer ◽  
Salt Lakes ◽  
Tropical Species ◽  
Salt Tolerant ◽  
Climatic Cycles

During 1974-1984, Lake Buchanan and seven peripheral pools usually contained water for only a few months each year, commencing in late summer. They ranged in salinity from 1 to 202 g l-1, their waters were dominated by sodium chloride, but with Ca2+/Mg2+ ratios of c. 1, and were generally alkaline. The fauna of 53 species included three halobionts (e.g. Parartemia minuta, Diacypris compacts), 18 halophilics (e.g. Mytilocypris splendida, Trigonocypris globulosa, Microcyclops dengizicus) and many salt- tolerant freshwater forms, mainly insects. Overall, the fauna was distinctly Australian, but some prominent taxa found in southern salt lakes were absent and others were replaced by local endemics and tropical species. Past climatic cycles have probably influenced the composition of the fauna.

Quantifying the areal extent and dissolved oxygen concentrations of Archean oxygen oases

2013 ◽  
Vol 362 ◽  
pp. 35-43 ◽  
Author(s):  
Stephanie L. Olson ◽  
Lee R. Kump ◽  
James F. Kasting
Keyword(s):  
Dissolved Oxygen ◽  
Areal Extent ◽  
Oxygen Concentrations
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