878 research outputs found
Effect of milk-kefir and soymilk-kefir on the serum allergen-specific antibody formation, and intestinal bacterial ecosystem in mice
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Effect of kefir consumption on the intestinal microflora and allergen-specific antibody’s formation in mice
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Essays on river mechanics
No full textInstructor: P.Y. Julien.Presented by the Graduate Students in CE 717 River Mechanics (Spring 1988).Includes bibliographical references.May 1988
(37(4):379-388)Growth Responses of Corn to Temperature and Photoperiod
No full text以玉米單雜交品種臺農351號與其母本TA80-2598及父本TA80-1410為材料，於生長箱中五種光期與溫度組合條件下栽培，並於3、7、9及12月室外盆栽，探討溫度與光期對葉原體分化速率、葉齡及生育日數的影響。高溫（33/25 °C）狀況較長光期（14 hr）之玉米雄穗分化始期葉齡較短光期（12 hr）處理為高，但對葉原體數目並無影響，最終葉數則因品種（系）而有異；較長光期又使母本自出土至幼穗分化始期、抽穗及開花之日數延長，唯對父本及雜交種之作用不明顯或有縮短的趨勢。同一光期（12 hr）而溫度由23/15 °C或18/10 °C時，雄穗分化始期葉齡及葉原體數目減小，最終葉數相近，出葉速率亦呈降低趨向，而植株發育至雄穗分化始期所需日數漸增；比較33/25與28/20 °C溫度處理結果，母本及雜交種植株自出土至抽穗、開花與吐絲所需日數差異並不明顯，或反以前者為高，可能為品種特性或過高之溫度並不能顯示溫度累積效應，此一推論可由室外盆栽試驗7月（較高溫）及9月（較低溫）播種處理之類似結果得到佐證。田間與生長箱高溫狀況下，玉米植株在雄穗分化始期（葉齡為10）以前之出葉速率多高於分化始期以後之出葉速率，顯示營養生長期與生殖生長期具有不同的生育特性，對環境因子的反應也具有程度上的差異。室外試驗與生長箱試驗結果相互吻合，並認為臺中地區栽培玉米之生長受溫度的影響較光期為大；於7至9月間播種時，植株葉數多，出葉速率快，營養生長量充足而生育期不致太長，應為適宜之栽培時期。
The single-cross corn Tainung 351 and its paternal inbred TA80-1410 and maternal inbred TA80-2598 were used to study the influences of temperature and photoperiod on the initiation rate of leaf primordia, leaf age and duration of growth in corn. Plants were cultured in the growth chamber under five combinations of temperatures and photoperiods. Plants were also sown in March, July, September and December of the year and cultured under natural conditions to confirm the results of growth-chamber study. At high temperature (33/25 C), plants under longer photoperiod (14 hr) showed a higher leaf age at tassel initiation (TI) than those grown under shorter photoperiod (12 hr). However, number of leaf primordia at TI was not affected and the response of final leaf number was erratic among the three corn materials. In addition, the longer photo-period tended to delay TI, tasseling and anthesis in TA80-2598. The effect was less clear in TA80-1410 and the hybrid. When temperature was lowered from 33/25 C to 23/15 C or 18/10 C at 12-hr photoperiod, leaf age and number of leaf primordia at TI, as well as leaf appearance rate decreased while final leaf number remained the same. Days from seedling emergence to TI also increased as a result of the lowered temperature. Comparison between temperature treatments of 33/25 and 28/20 C indicated that days needed from seedling emergence to tasseling, anthesis and silking were not significantly different in most cases or even longer for the 33/25 C treatment. The results suggested the existence of varietal variations or lack of accumulated temperature effect under extreme temperatures. The assumption was confirmed by the outdoor experiment in which similar results were obtained between the Juiy (high temperature) and September (relatively low temperature) sowings. Leaf appearance rate was higher in the vegetative growth (seedling emergence to leaf age 10) than in the reproductive growth (after leaf age 10), suggesting different growth responses to environmental factors between the two phases of development. In most instances, results of the outdoor experiment were in agreement with those of the growth-chamber study in terms of the temperature effects. It was also concluded that for corn grown in Taichung area, the influences of temperature were more significant than those exerted by photoperiod. Sowing corn between July and September was considered suitable as plants tended to possess more leaves, higher leaf appearance rate and sufficient vegetable growth with an appropriate growth duration
Highly efficient blue OLEDs using ter(9,9-diarylfluorene)s with ambipolar carrier transport properties
No full textHeavy metals in an impacted wetland system : a typical case from southwestern China
No full textAuthor name used in this publication: Grace P.Y. Sin2007-2008 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishedGreen (AAM
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