3,802 research outputs found
Deformation Density Studies of Thiathiophthene. 3. Theoretical Studies on 2, 5-Dimethylthiathiophthene and 2, 4-Diphenylthiathiophthene
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Charge Density Distributions, Interaction Energies, and Electrostatic Potentials of Hydrogen Bonds
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The My Lai Massacre in American history and memory
No full textThis book examines the response of American society to the massacre and its ambiguous place in American national memory. The author argues that the massacre revelations left many Americans untroubled, and it was only when the soldiers most immediately responsible came to be tried that the controversy really came to public attention. He finds that, contrary to interpretations of the Vietnam conflict as an unhealed national trauma or wound, many Americans have assimilated the war and its violence rather too well, and they were able to do so even when that violence was most conspicuous and current. Consistent with the view that US soldiers have subsequently been cast in national culture as the conflict’s principal victims, it was the American perpetrators of the massacre and not the Vietnamese they brutalized who, even in the case of My Lai, became the central object of popular concern
An augmented chart parsing algorithm integrating unification grammar and Markov language model for continuous speech recognition
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Structure and development of epiphylly in knox-transgenic tobacco
No full textS.521-525Anatomical modifications and developmental patterns of tobacco (Nicotiana tabacum L.) plants transgenic for the barley (Hordeum vulgare L.) homeobox genes bkn-1 or bkn-3 were analysed and the morphogenetic processes interpreted. No appreciable difference between bkn-1 and bkn-3 transgenic tobacco was observed in the examined transgenic plants. They were dwarfed and developed epiphyllous appendages on all leaves except the cotyledons. Two major categories of epiphyllous structure were recognised: (i) vegetative shoots on juvenile heart-shaped leaves and (ii) inflorescences or flowers on adult lanceolate leaves. Both types of epiphyllous structure originated in the subepidermal layers, either directly from individual meristems or from an expanded meristematic "cushion". Structural analysis confirmed that the occurrence of epiphylls in the tobacco transformants represented a switch from determinate to indeterminate leaf growth and reproduced the phenotype of the barley Hooded mutant, which had earlier been shown to be associated with the bkn-3 gene [K.J. Müller et al. (1995) Nature 374:727-730].214Nr.
(16(4):27-31)溫度對洋菇孢子發芽之影響
No full textInduced spore germination of A. bisporus as affected by heat treatment was studied. The optimum temperature for the stimulation of basidiospore germina-tion was 45°C. The time required for the treatment to obtain better germination was also studied. For spore germination 10 to 50 minutes of heat treatment was considered effective. The optimum temperature for incubation of the heat-treated basidiospores was 28°C. The highest percentage of spore germination thus obtained was 25 per cent.
1. 本試驗應用溫度處理洋菇孢子，探求處理孢子發芽最適合之溫度與時間，俾能提高洋菇孢子之發芽率，進而應用於單孢分離，選種培養與育種工作。
2. 洋菇孢子發芽之溫度自40℃到55℃不等，而以45℃ 為最適溫度。
3. 洋菇孢子在45℃之溫度下處理5分鐘到90分鐘不等，均可刺激其發芽，其中以10分鐘到50分鐘為最佳，而且具有同樣效果。
4. 最適洋菇孢子發芽之培養溫度為28℃，最低極限為18℃，最高極限為34℃。
5. 洋菇孢子經45℃處理30分鐘後培養於28℃下，可將其發芽率提高達百分之二十五
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