4,583 Result(s)
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** **ang Zhang
Life Sciences
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Article
Fatty acid metabolism and cell proliferation. V. Evaluation of pathways for the generation of lipid peroxides
Primary cultures of smooth muscle cells were established from the medial layer of guinea pig aorta. Confluent cells at passage level 4–6 were challenged with arachidonic acid and treated with a number of antio...
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Fatty acid metabolism and cell proliferation. VII. Antioxidant effects of tocopherols and their quinones
The antioxidant capacities of α- and γ-tocopherols (α-E and γ-E) and their quinones (α-EQ and γ-EQ) were determined in non-biological and biological systems. The non-biological system consisted of arachidonic ...
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Article
Ammonia switch-off of nitrogenase from Rhodobacter sphaeroides and Methylosinus trichosporium: no evidence for Fe protein modification
In vivo switch-off of nitrogenase activity by NH 4 + is a reversible process in Rhodobacter sphaeroides and Methylosinus trichosporium OB3b. The same pattern of...
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Article
Chinese whip scorpion using 2-ketones in defense secretion (Arachnida: Uropygi)
North American as well as East Asian whip scorpions of the generaMastigoproctus andTypopeltis are known to use acetic acid and caprylic acid as a defense mechanism. In the secretion from defense glands of a Chine...
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Biology ofAllothrombium pulvinum (Acariformes: Trombidiidae), a potential biological control agent of aphids in China
Allothrombium pulvinum Ewing is a common natural enemy of aphids and other small arthropods in China. It is univoltine species. The eggs hatch in spring, nymphs emerge in early summer, and adults emerge in autum...
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Article
Construction and hyperproductivity of engineered strain QE79 bearing recombinant plasmid containing penicillin G acylase gene from Escherichia coli strain AS1.76
An engineered strain QE79 bearing a recombinant plasmid containing the penicillin G acylase gene from E.coli strain AS1.76 was constructed. Formation conditions of the penicillin G acylase were studied. The ac...
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Article
Applied acarology
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Article
Complementation of a pleiotropic Nif-Gln regulatory mutant of Rhodospirillum rubrum by a previously unrecognized Azotobacter vinelandii regulatory locus
A spontaneous pleiotropic Nif- mutation in Rhodospirillum rubrum has been partially characterized biochemically and by complementation analysis with recombinant plasmids carrying Azotobacter vinelandii DNA in the...
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Article
Oxidation of dimethyl sulfide byPseudomonas acidovorans DMR-11 isolated from peat biofilter
Pseudomonas acidovorans DMR-11, capable of oxidizing dimethyl sulfide (DMS), was isolated from peat biofilter. DMS as a sole carbon or energy source was not degraded, but it was co-degraded in the medium contain...
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Parasitism ofAcyrthosiphon pisum byAllothrombium pulvinum (Acariformes: Trombidiidae): Host attachment site, host size selection, superparasitism and effect on host
Several aspects of parasitism of the pea aphid,Acyrthosiphon pisum (Harris), by the mite parasiteAllothrombium pulvinum Ewing, were examined in the laboratory. Larvae ofA. pulvinum were fastmoving mites that find...
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Article
DNA methylation inhibits propagation of tomato golden mosaic virus DNA in transfected protoplasts
The effects of methylation on plant viral DNA replication have been studied inNicotiana tabacum protoplasts transfected with DNA of the geminivirus tomato golden mosaic virus (TGMV). The transfected cells were al...
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Article
Foraging time and spatial patterns of predation in experimental populations
Responses of the predaceous mites Phytoseiulus persimilis, Typhlodromus (=Metaseiulus) occidentalis, and Amblyseius andersoni to spatial variation in egg density of the phytophagous mite, Tetranychus urticae, wer...
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Phototactic and geotactic responses inAllothrombium pulvinum larvae (Acari: Trombidiidae)
Phototactic and geotactic responses of larvae ofAllothrombium pulvinum Ewing were examined in the laboratory.Allothrombium pulvinum larvae showed positive phototaxis and negative geotaxis. Positive phototaxis and...
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Article
Functional response ofAllothrombium pulvinum deutonymphs (Acari: Trombidiidae) on two-spotted spider mites (Acari: Tetranychidae)
Functional responses of deutonymphs of the predatory mite,Allothrombium pulvinum Ewing, on eggs and adult females of two-spotted spider mite,Tetranychus urticae Koch, were determined in the laboratory. Predation ...
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Transfection of heteroduplexes containing uracil · guanine or thymine · guanine mispairs into plant cells
We have compared the fate of U · G mispairs or analogous T · G mispairs in DNA heteroduplexes transfected into tobacco protoplasts. The heteroduplex DNA consisted of tomato golden mosaic virus DNA sequences in...
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Researches of acarology in China
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Article
Host feeding, damage and control of the mushroom pest, Brennandania lambi (Acari: Pygmephoroidea) in China
The pygmephoroid mite, Brennandania lambi (Krczal), is the most serious mite pest of mushroom production in Shanghai. China. This mite could not develop and reproduce on the mycelia of Lentinus edodes, Flammulina...
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Article
The effect of timed water stress on quality, total solids and reducing sugar content of potatoes
Potato (Solanum tuberosum L.) solids and reducing sugars were examined before, just after, and two weeks after transient water stress to gain an understanding of tuber changes that occur directly associated with ...
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Article
Control of Brennandania lambi (Acari: Pygmephoroidea) by freezing: evaluation of its efficacy and effects on mushroom growth and yield
Laboratory and field studies were conducted to evaluate freezing as a control measure against Brennandania lambi (Krczal) which infests cultivated mushrooms (Agaricus bisporus) in Shanghai primarily through conta...
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Article
Spatial scale of aggregation in three acarine predator species with different degrees of polyphagy
Aggregative responses by the predatory mites, Phytoseiulus persimilis, Typhlodromus occidentalis, and Amblyseius andersoni (Acari: Phytoseiidae), to spatial variation in the density of mobile stages of Tetranychu...
