[PDF] Preprints Of Papers Presented At 162nd National Meeting Washington Dc September 12 17 1971 eBook

Preprints Of Papers Presented At 162nd National Meeting Washington Dc September 12 17 1971 Book in PDF, ePub and Kindle version is available to download in english. Read online anytime anywhere directly from your device. Click on the download button below to get a free pdf file of Preprints Of Papers Presented At 162nd National Meeting Washington Dc September 12 17 1971 book. This book definitely worth reading, it is an incredibly well-written.

The Use of Bluegills to Detect Zinc

John Cairns
The Use of Bluegills to Detect Zinc by John Cairns PDF

Author : John Cairns
Publisher :
Page : 60 pages
File Size : 30,99 MB
Release : 1971
Category : Bluegill
ISBN :

GET BOOK

In conjunction with already existing methods for measuring the chemical and physical characteristics of water, methods for rapidly measuring biological effects of water quality would be very useful. Thus the authors studied the effects of pollution on the breathing rates of bluegills. The presence of zinc at concentrations of 8.7, 5.22, 4.16 and 2.55 mg/l in dechlorinated municipal tapwater was detected by an increase in breathing rate or a change in breathing rate variance of bluegills. None of the fish exposed to the three lower concentrations died during the experiments. The criterion for detection was an arbitrary number of responses occurring at the same time. An in-plant system for the prevention of fish kills caused by spills could be developed by monitoring several biological functions of fish simultaneously.

The Use of Fish Movement Patterns to Monitor Zinc

John Cairns
The Use of Fish Movement Patterns to Monitor Zinc by John Cairns PDF

Author : John Cairns
Publisher :
Page : 76 pages
File Size : 22,1 MB
Release : 1971
Category : Bluegill
ISBN :

GET BOOK

A continuous monitoring system, consisting of an apparatus to detect light beam interruptions as a sign of aberrations in fish movement patterns, has been used to study the effects of fish exposure to lethal and sublethal concentrations of zinc. In addition to the exposure monitoring, the growth and reproductive success of exposed bluegill (Lepomis macrochirus) were studied. In the movement tests, Notemigonus crysoleucas and Carassius auratus were exposed to 2.94-3.64 mg/l zinc ions as zinc sulfate for 96 hrs. The light system detected premortal movement aberrations allowing for survival of test fish by condition reversal. Analysis of LD50 levels was accomplished and recorded by atomic absorption spectrophotometry twice daily. Growth and reproduction tests involved exposure of one male and 3 females to Zn concentrations about equal to 0.1-0.01 of the lowest concentration detected by the monitoring tests. Eggs were collected and hatched separately. Concentrations of one-tenth the lowest zinc concentrations eliminated reproduction in the bluegills.

Optimization of Coal Gasification Processes

West Virginia University. Department of Chemical Engineering
Optimization of Coal Gasification Processes by West Virginia University. Department of Chemical Engineering PDF

Author : West Virginia University. Department of Chemical Engineering
Publisher :
Page : 88 pages
File Size : 13,34 MB
Release : 1972
Category : Coal gasification
ISBN :

GET BOOK

Modern Energy Technology

Research and Education Association
Modern Energy Technology by Research and Education Association PDF

Author : Research and Education Association
Publisher :
Page : 900 pages
File Size : 18,89 MB
Release : 1975
Category : Power (Mechanics)
ISBN :

GET BOOK