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Articles 1021 - 1026 of 1026

Full-Text Articles in Life Sciences

Statistical Analysis Of Cryptic Variation In Drosophila Alcohol Dehydrogenase, Gurbachan Miglani, Franklin Ampy Aug 1981

Statistical Analysis Of Cryptic Variation In Drosophila Alcohol Dehydrogenase, Gurbachan Miglani, Franklin Ampy

Franklin Ampy

Statistical analysis indicated that mean alcohol dehydrogenase (ADH) activity levels within ADH1 and ADH11 isochromosomal lines varied significantly among the Mexican populations ofDrosophila melanogaster used. Also as indicated by coefficient of variation values for ADH activity, the relative amount of genetic variation differed among and within the ADH1 and ADH11 strains examined. The quantitative nature of the differences in ADH activity supported the concept of the additive gene action of the alcohol dehydrogenase (Adh) locus. The manner in which our isochromosomal lines were constructed suggested that genes regulating ADH activity inD. melanogaster were located on the second chromosomes.

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Fungal Metabolite From Members Of The Genus Rhizopus, D P. Thompson, A W. Smalley, Broderick Eribo Apr 1981

Fungal Metabolite From Members Of The Genus Rhizopus, D P. Thompson, A W. Smalley, Broderick Eribo

Broderick Eribo

A fluorescent metabolite present in seven members of the genus Rhizopus was isolated. This compound appeared green before spray treatment and purple after spray treatment with p-anisaldehyde in visible light. Subsequent purification and structural elucidation of the isolated compound yielded 1-[2,6,10,14-tetramethyl-17-carbomethyl heptadecyl]-1-[2,6,10,14-tetramethyl-17-methanoyl heptadecyl]-benzene.

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Immunobiology Of Schistosomiasis, Clarence Lee, Mohamed A. Elhelu, Georgiana Aboko-Cole Feb 1980

Immunobiology Of Schistosomiasis, Clarence Lee, Mohamed A. Elhelu, Georgiana Aboko-Cole

Clarence Lee

Although malaria and hookworm disease appear to be on the decline, another dreaded parasitic disease-schistosomiasis-is on the increase. Presently, the number of infected individuals with schistosomes is estimated to be 250 million, and even though only a small proportion of them become sick and die, schistosomiasis remains a medical problem of great significance. The high incidence of infection of man with Schistosoma mansoni, Schistosoma japonicum or Schistosoma haematobium, as well as the chronic debilitating diseases produced, places these organisms among the world's most important infectious agents. This paper discusses the nature of immunity to schistosomiasis.

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Genetic Control Of Murine Igd Structural Heterogeneity, Roberta R. Pollock, Martin E. Dorf, Matthew F. Mescher Dec 1979

Genetic Control Of Murine Igd Structural Heterogeneity, Roberta R. Pollock, Martin E. Dorf, Matthew F. Mescher

Roberta Pollock

Murine B lymphocytes express two native forms of surface IgD: IgDI consists of two delta heavy chains and two light chains; IgDII consists of one heavy chain and one light chain. The relative amounts of IgDI and IgDII present on spleen cells were found to vary significantly among different strains of mice. Genetic evidence demonstrated that the IgDI/IgDII ratio is linked to the Igh-5 allotype. (The delta heavy chain is the product of the Igh-5 locus). Mice bearing the Igh-5e allotype have a low ratio, and mice bearing the Igh-5a or Igh-5b allotype have a high ratio. The Igh-5 locus …

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Immunobiology Of Malaria, Clarence Lee, Yvonne Hogan, Georgiana Aboko-Cole Mar 1979

Immunobiology Of Malaria, Clarence Lee, Yvonne Hogan, Georgiana Aboko-Cole

Clarence Lee

Malaria, the number one disease in the world, is caused by intracellular protozoans belonging to the Subphylum, Sporozoa; Suborder, Haemosphoridia; and Family, Plasmodiidae. The four classical organisms producing disease in man are Plasmodium vivax, P. falciparum, P. malariae, and P. ovale. Although malaria has been known to man for centuries, attempts are still being made to control and eliminate its devastating effects in tropical and subtropical areas of the world. Current active interest in malarial immunology and immunopathology derives from two main facts: (1) that human malaria is still one of the chief health problems in a broad tropical and …

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Logical And Persuasive Structures In Charles Darwin's Prose Style, Charles Kay Smith Dec 1969

Logical And Persuasive Structures In Charles Darwin's Prose Style, Charles Kay Smith

Charles Kay Smith

This paper analyzes Charles Darwin's characteristic writing behavior. Darwin was a more interesting and dedicated writer than he is commonly credited for being. This essay will reassess the importance of his writing. The surface characteristics of Darwin's prose (conventionally referred to as his "style") seem at first glance so plain and ordinary that Darwin's writing rarely interests students of style. Exceptions such as Theodore Baird in an essay entitled "Darwin and the Tangled Bank"1 and Stanley Edgar Hyman in a longer study of Darwin's writing, The Tangled Bank,2 both make a point of the current general disregard of Darwin as …

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