R. Koch

Publications83
h-index26
Citations1,799
Highly Influential Citations6
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Linoleic acid and trilinolein as substrates for soybean lipoxidase (s).
Abstract Defatted soy flour extract has been fractionated into two fractions containing highly active lipoxidase enzymes. Evidence has been presented that each of the fractions contains a different… Expand
  • 100
  • 2
Chlorinated hydrocarbon insecticides: Inhibition of rabbit brain ATPase activities
  • R. Koch
  • Chemistry, Medicine
  • Journal of neurochemistry
  • 1 February 1969
D m m biochemical evidence for the toxic effects of chlorinated hydrocarbon insecticides has been lacking. In this report, evidence is presented that chlordane, aldrin, dieldrin, lindane, and DDT… Expand
  • 101
  • 1
Inhibition of oligomycin-sensitive and -insensitive magnesium adenosine triphosphatase activity in fish by polychlorinated biphenyls.
Abstract Tests in vitro with four polychlorinated biphenyls (PCBs) on four tissues of fish showed prominent inhibitory effects on oligomycin-insensitive Mg 2+ ATPase, with muscle homogenate being… Expand
  • 40
  • 1
In vitro inhibition of fish brain ATPase activity by cyclodiene insecticides and related compounds
  • 32
  • 1
Comparative resistance of strains of Clostridium botulinum to gamma rays.
A total of 102 strains of Clostridium botulinum (56 strains of type A, 43 type B, and 3 nontoxigenic strains which could not be typed) was examined for resistance to gamma rays. When these organisms… Expand
  • 24
  • 1
ATPase activity in fish tissue homogenates and inhibitory effects of DDT and related compounds.
Abstract The specific activities of ATPases in homogenates of bluegill fish tissues were determined and found to be similar to those previously reported for rabbit tissues. Na+-K+ ATPase was most… Expand
  • 69
FRACTIONATION OF OLFACTORY TISSUE HOMOGENATES. ISOLATION OF A CONCENTRATED PLASMA MEMBRANE FRACTION
Abstract— Differential and sucrose‐density‐gradient centrifugation techniques were used for studies on the separation of subcellular particles from rabbit brain and olfactory tissue. Comparisons were… Expand
  • 92
A comparison of DDT and its biodegradable analogues tested on ATPase enzymes in cockroach
Abstract Analogues of DDT (ethoxymethyl and methoxymethio derivatives) compared with DDT for their inhibitory action on the ATPase system from tissues of the cockroach, Periplaneta americana show… Expand
  • 59
Inhibition of oligomycin-sensitive (mitochondrial) Mg 2+ ATPase by DDT and selected analogs in fish and insect tissue.
Abstract Mitochondrial (oligomycin-sensitive) Mg 2+ ATPase from cockroach muscle is shown to have a very high sensitivity to DDT when compared to fish brain preparations and to inhibition of the same… Expand
  • 63
DDT: Effect of continuous exposure on atpase activity in fish,Pimephales promelas
Fat head minnows, 45-days old, were continuously exposed to DDT using continuous water flow and constant temperature conditions. Exposures were to 0.5 and 2.0 ppb of DDT in water, and combinations of… Expand
  • 47
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