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Selected Works

1984

Articles 1 - 9 of 9

Full-Text Articles in Life Sciences

Heterochronic Mutants Of The Nematode Caenorhabditis Elegans, Victor Ambros, R. Horvitz Oct 1984

Heterochronic Mutants Of The Nematode Caenorhabditis Elegans, Victor Ambros, R. Horvitz

Victor R. Ambros

Mutations in the Caenorhabditis elegans genes lin-14, lin-28, and lin-29 cause heterochronic developmental defects: the timing of specific developmental events in several tissues is altered relative to the timing of events in other tissues. These defects result from temporal transformations in the fates of specific cells, that is, certain cells express fates normally expressed by cells generated at other developmental stages. The identification and characterization of genes that can be mutated to cause heterochrony support the proposal that heterochrony is a mechanism for phylogenetic change and suggest cellular and genetic bases for heterochronic variation.

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The Role Of Biogenic Amines In The Regulation Of Exocrine Gland Function: A Possible Mechanism For The Pathogenesis Of Cystic Fibrosis, A. Tenenhouse, E. Yu Dec 1983

The Role Of Biogenic Amines In The Regulation Of Exocrine Gland Function: A Possible Mechanism For The Pathogenesis Of Cystic Fibrosis, A. Tenenhouse, E. Yu

Edward Yu

No abstract provided.

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Investigations Of The Potential Effects Of Underwater Noise From Petroleum Industry Activities On Migrating Gray Whale Behavior. Phase Ii: January 1984 Migration, Charles Malme, Paul Miles, Christopher Clark, Peter Tyack, James Bird Dec 1983

Investigations Of The Potential Effects Of Underwater Noise From Petroleum Industry Activities On Migrating Gray Whale Behavior. Phase Ii: January 1984 Migration, Charles Malme, Paul Miles, Christopher Clark, Peter Tyack, James Bird

James E Bird

The applied research discussed in detail in this report supplements the work performed during the 1983 southbound and northbound migrations of the gray whale, Eschrichtius robustus, in the Monterey, California region. The objective of both phases has been to determine the degree of behavioral response of migrating gray whales to acoustic stimuli associated with oil and gas exploration and development activities. The results of that earlier work were presented in Bolt Beranek and Newman Inc. Report No. 5366* This companion document extends the 1983 research effort, adding to the statistical data base through measurements of behavioral response of the January …

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Larval Parasitism Of Psilocorsis Spp. (Lepidoptera: Oecophoridae), Leaftiers Of Central Missouri Oaks, J. Pasek, W. Kearby Dec 1983

Larval Parasitism Of Psilocorsis Spp. (Lepidoptera: Oecophoridae), Leaftiers Of Central Missouri Oaks, J. Pasek, W. Kearby

Judith E Pasek

Larval parasitism of 3 Psilocorsis species in central Missouri forests averaged 22% for the years 1977-1979. Twenty-three species of parasitoids were reared in the laboratory from the larvae collected. Seventeen species emerged from P. reflexella Clemens, 14 from P. quercicella Clemens, and 10 from P. cryptolechiella (Chambers). The most abundant parasitoids were the braconids Apanteles n. sp., Agathis calcarata (Cresson), and A. cincta (Cresson); the eulophid Elachertus proteoteratis Howard; the ichneumonid Diadegma psilocorsis Walley; and the 3 closely related pteromalids, Perilampus fulvicornis Ashmead, P. prothoracicus Smulyan, and P. n. sp. Elachertus proteoteratis was reared only from P. reflexella. Twenty-three new …

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Tva Fluid Fertilizers Chapter Seven - Suspension Fertilizers - Production And Use, J Getsinger, Frank Achorn, George Hoffmeister, Robert Mikkelsen Dec 1983

Tva Fluid Fertilizers Chapter Seven - Suspension Fertilizers - Production And Use, J Getsinger, Frank Achorn, George Hoffmeister, Robert Mikkelsen

Robert Mikkelsen

No abstract provided.

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Extracellular Enzyme Production By Rhizopus And Mucor Species On Solid Media, D P. Thompson, Broderick Eribo Dec 1983

Extracellular Enzyme Production By Rhizopus And Mucor Species On Solid Media, D P. Thompson, Broderick Eribo

Broderick Eribo

Solid media were employed to determine the presence and absence of extracellular enzyme production by two genera of fruit-rot fungi, Rhizopus and Mucor. The results of this investigation revealed that phosphatase was released into the cultural medium by all the fungi examined; however, only R. oryzae, R. tritici, M. mucedo, and M. piriformis showed the possibility of being high producers of the enzyme. Protease, urease, ribonuclease, pectate lyase, and polygalacturonase, at varying levels of activity, were detected, in the majority of the fungi, in the cultural medium.

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Intensity As A Third Factor Of Disturbance Regime And Its Effect On Species Diversity, George P. Malanson Dec 1983

Intensity As A Third Factor Of Disturbance Regime And Its Effect On Species Diversity, George P. Malanson

George P Malanson

No abstract provided.

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Chapter Six - Liquid (Solution) Fertilizers, Frank P. Achorn, Lawrence C. Faulkner, Robert Mikkelsen Dec 1983

Chapter Six - Liquid (Solution) Fertilizers, Frank P. Achorn, Lawrence C. Faulkner, Robert Mikkelsen

Robert Mikkelsen

No abstract provided.

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Tva Fluid Fertilizers Chapter Three - Physical Properties Evaluation Aspects, T M. Jones, H L. Balay, Robert Mikkelsen Dec 1983

Tva Fluid Fertilizers Chapter Three - Physical Properties Evaluation Aspects, T M. Jones, H L. Balay, Robert Mikkelsen

Robert Mikkelsen

No abstract provided.

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