Map showing distribution of copper, lead, zinc, mercury, and arsenic in the sediments off the coast of northern Alaska

10.3133/mf614 ◽  
1974 ◽  
Keyword(s):  
Lead Zinc ◽  
Northern Alaska ◽  
Copper Lead

Influence of Feeding Dehydrated Poultry Waste on Composition and Organoleptic Quality of Milk1

1977 ◽  
Vol 40 (1) ◽  
pp. 29-31 ◽  
Author(s):  
J. C. BRUHN ◽  
G. D. REIF ◽  
H. TOONE ◽  
J. H. EVANS
Keyword(s):  
Dairy Cows ◽  
Milk Quality ◽  
Poultry Waste ◽  
Quality Factors ◽  
Lactating Dairy Cows ◽  
Period 2 ◽  
Lead Zinc ◽  
Copper Lead ◽  
Composite Samples

A double reversal trial with three, 4-week periods was used to determine the effect on milk quality of feeding dehydrated poultry waste to lactating dairy cows. Fifteen cows were fed a control ration for 4 weeks (Period 1), followed by an experimental ration containing dehydrated poultry waste for 4 weeks (Period 2), and then by the control ration for 4 weeks (Period 3). Milk was collected daily and scored by five judges using the ADSA milk flavor scoring guide. Milk compsition (fat, protein, lactose, and solids-not-fat) was determined on alternate days. During Periods 2 and 3 weekly composite samples were collected to determine concentrations of cadmium, copper, lead, zinc, and tocopherol. No significant differences were found in any of the milk quality factors studied.

Distribution and significance of copper, lead, zinc and cadmium in the Corio Bay ecosystem

1981 ◽  
Vol 32 (2) ◽  
pp. 151 ◽  
Author(s):  
JD Smith ◽  
ECV Butler ◽  
BR Grant ◽  
GW Little ◽  
N Millis ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Nutrient Cycling ◽  
Mytilus Edulis ◽  
Water Exchange ◽  
Dry Weight ◽  
Weight Basis ◽  
Threshold Levels ◽  
Lead Zinc ◽  
Significant Interference ◽  
Copper Lead

Levels of copper, lead, zinc and cadmium in sediments, waters and mussels (Mytilus edulis) from Corio Bay (Vic.) were measured on two occasions in 1977. The bay has restricted water exchange with Port Phillip Bay and is known to have received a major input of cadmium. The respective concentrations of copper, lead, zinc and cadmium in the sediments were 2-50,2-2l0,4-398 and up to 12.6 �g/g; in the unfiltered waters, I .5-25, <0.4-11, 3.9-67 and 0.11-5.6 �g/l; and in the mussels, 4.8-21. 1.2-9.7, 105-110 and 9.8-53 �g/g on a dry weight basis. The observed levels of heavy metals are compared with threshold levels reported in the literature as causing significant interference with growth of phytoplankton and nutrient cycling by bacterial processes.

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