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Life Sciences
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Article
Chemical retardation of the reduction of flooded soils and the growth of rice
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Tissue and cell culture as AIDS to sugarcane breeding. I. Creation of genetic variation through callus culture
Four-hundred and seventeen plants from 8 sugarcane varieties were selected among the 4600 plants that had been generated from calluses of shoot-apices, rolled young leaves and young inflorescences of 58 variet...
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Tissue and cell culture as aids to sugarcane breeding. II. Performance and yield potential of callus derived lines
Thirteen callus derivatives from the sugarcane (Saccharum sp. hybrid) varieties ‘F156’ and ‘F164’ were studied to investigate the potential of tissue culture methods to generate superior germplasm for plant breed...
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Abstracts of papers presented at the 63rd annual PAA meeting
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Effect of changes in population size on the correlation between mutation rate and heterozygosity
The effect of changes in population size on the correlation between mutation rate and heterozygosity was studied by using two models: sudden change in population size and gradual change. It was shown that the ...
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A simulation study on Nei and Li's model for estimating DNA divergence from restriction enzyme maps
A simulation study has been conducted to check the accuracy of Nei and Li's (1979) formulas for the mean and variance of the proportion (S) of identical restriction sites between two DNA sequences and for esti...
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Effect of water mobility on lateral diffusion of phospholipids in liposomes
Recently, several studies have shown that the rate of lateral diffusion of liquid-crystalline phospholipids in various phospholipid/water lamellar systems depends markedly on the hydration over the water conte...
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Contradictory differential staining results with Coomassie Brilliant Blue and silver carbonate on sister chromatids
Coomassie Brilliant Blue, and silver stain, are used in electrophoretic gels to identify polypeptides. The relative staining intensity has been taken as indicating a quantitative difference between proteins. H...
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Patterns of nucleotide substitution in pseudogenes and functional genes
The pattern of point mutations is inferred from nucleotide substitutions in pseudogenes. The pattern obtained suggests that transition mutations occur somewhat more frequently than transversion mutations and t...
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Eucheuma of Taiwan — Emphasizing its mariculture potential
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Nonrandomness of point mutation as reflected in nucleotide substitutions in pseudogenes and its evolutionary implications
We have obtained a revised estimate of the pattern of point mutation by considering more pseudogene sequences. Compared with our previous estimate, it agrees better with expectations based on the double-strand...
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Regional variation of cancer mortality incidence and its relation to selenium levels in China
The epidemiological relationship between selenium level and age-adjusted human cancer mortality (incidence) was studied in 24 regions located in eight provinces of China. Statistically significant inverse corr...
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Induction of a cytochrome P-450-dependent fatty acid monooxygenase in Bacillus megaterium by a barbiturate analog, 1-[2-phenylbutyryl]-3-methylurea
In previous publications from our laboratory, we reported that a soluble, cytochrome P-450-dependent fatty acid monooxygenase from Bacillus megaterium ATCC 14581 can be induced by phenobarbital and a variety of o...
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Computer control for continuous cultivation ofSaccharomyces cerevisiae
An on-line respiratory quotient control system has been developed for the continuous cultivation of baker's yeast. This system is based on moving identification of the microbial dynamics. The optimal dilution ...
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Computer control for continuous cultivation ofSaccharomyces cerevisiae
An on-line respiratory quotient control system has been developed for the continuous cultivation of baker's yeast. This system is based on moving identification of the microbial dynamics. The optimal dilution ...
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Evolutionary change of restriction sites under unequal rates of nucleotide substitution among the three positions of codons
Under the assumption of unequal rates of nucleotide substitution among the three positions of codons, mathematical formulas are derived for the probability that a restriction site observed at time 0 in a DNA s...
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Effect of inoculum on yeast cell aggregation
Saccharomyces uvarum, Kluyveromyces marxianus, Saccharomyces cerevisiae, and Candida sp. were induced to form cell aggregates in a column. The conditions for this induction were high cell density and slow flow r...
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Individual variations in the content of giant secretory polypeptides in salivary glands of Chironomus
Salivary glands in aquatic larvae of Chironomus are responsible for formation of a fiber that larvae use to construct feeding tubes. Major constituents of this fiber include a family (the sp-I family) of high M r
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An evolutionary perspective on synonymous codon usage in unicellular organisms
Observed patterns of synonymous codon usage are explained in terms of the joint effects of mutation, selection, and random drift. Examination of the codon usage in 165Escherichia coli genes reveals a consistent t...
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Models of nearly neutral mutations with particular implications for nonrandom usage of synonymous codons
The population dynamics of nearly neutral mutations are studied using a single-site and a multisite model. In the latter model, the nucleotides in a sequence are completely linked and the selection schemes emp...
