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Therefore, we selected common species of Ranunculaceae. comparative primordial plants in Alpine Meadow at Eastern QinghaiTibetan Plateau, and studied the reproductive strategies, such as reproductive allocation, especially sex allocation, to understand how the plants adapt the environmental conditions. The results showed:(1) At higher altitude, the self-incompatible plant, such as Trollius ranunculoides tended to become limited by pollination rather than by nutrient availability, while the self-compatible plants, such as Anemone rivularis and A. obtusiloba seemed not to be limited by pollen availability, which suggested that ability of self pollination for alpine plants may be a mechanism of reproductive assurance.(2) Influences induced by high altitude on the reproduction of these species occurred on different reproductive characters, which suggest species-specific adaptive strategies. The influences are dependent on plant size to some extent.
因此,我们选择在青藏高原东部的高寒草甸,以比较原始的植物类群—毛茛科植物为研究对象,选择一些常见种探讨其繁殖对策,如繁殖分配和性分配问题,试图揭示这些植物如何适应环境条件,最后的结果表明: 1高寒草甸高海拔区,自交植物(如小花草玉梅A.rivularis和钝裂银莲花A.obtusiloba)的繁殖不受花粉限制,而完全异交植物(毛茛状金莲花T.ranunculoides)的繁殖受花粉限制,表明高海拔地区植物的白花授粉能力可能是一种繁殖保障机制,能够避免恶劣环境对植物有性繁殖的不利影响; 2海拔高度对植物的影响因种而异,不同的物种受影响的繁殖性状不同,即使同属亲缘种间也存在差异,表明不同物种对相似环境压力的适应对策不同;而且,海拔高度对植物的影响在一定程度上依赖于植物个体大小,说明植物通过调整其个体大小与繁殖性状的关系来适应环境梯度的变化; 3植物花期和果期的繁殖分配并不完全随海拔升高而减小(只有小花草玉梅的果期RA随海拔升高而减小30%),与Iwasa和Cohen的预测不完全一致(他们认为繁殖分配随生长季缩短而减小)。
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Especially , the rearrangement reaction of converting styrene oxide to phenylacetyldehyde were investigated. In this paper, we also studied the method of preparing SO42-/TiO2 by vitriolic titanium boiling regurgitant hydrolyzation and applications of SO42-/TiO2 in the preparation of iso-amyl acetate.
对环氧苯乙烷经分子重排反应制备苯乙醛进行了深入研究;本论文还用硫酸钛沸腾回流水解法制备了纳米SO_4~(2-)/TiO_2固体超强酸粉末,并应用于冰乙酸与异戊醇酯化合成乙酸异戊酯的反应。
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With CYP1A2, 3-fold enhancement in actiity per cell was seen for conerting ethoxyresorufin to resorufin compared to C3A cell monolayers.
结果发现,每个细胞中CYP1A2将乙氧基-异吩唑酮转化为9-羟基-3-异吩恶唑酮的能力相对于单细胞层的C3A细胞增强了3倍。
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The result showed that the dosage of 5000 IJs/plant was the best one among the 8 dosages, the average of injured legume (3.l%) with BPS was significant lower than that of 40% isofenphos-methyl solution (9.0%) and than that of tap water (53.2%). The rate of grub decrease (95.7%) and the dry weight of peanut (5941.5 kg/ha) with BPS were significant different (P.05) to that of with 40% isofenphos-methyl solution (82.7%, 303.8 kg). The application of BPS was better with irrigation than with spray. At the dosage of 5000 IJs/plant, the combination of BPS and Rhabditis sp.(4500:500) did not show conflictive, coordinate or synergistic effect to grub control.
结果显示:在8个处理剂量中,以5000 IJs/穴的剂量田间效果最好,花生荚果受害率(3.1 %)显著低于40 %甲基异柳磷对照的(9.0 %)和清水对照的荚果受害率(53.2 %),蟒螬减退率(95.7%)和平均产量(5941.5 kg/hm^2)也与40%甲基异柳磷对照的(82.7%, 303.8 kg)有显著差异(P.05);灌施效果显著好于喷施;在5000 IJs/穴的剂量下,混合喷施BPs线虫和小杆线虫(4500:500),未表现出相克、协同或加性效应。
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Adding purified stylar S-RNase from Prunus mume cultivar 'Gessekai' to liquid medium, for cultivating self- and cross-pollen at temperatures lot, 25℃ and 35℃, respectively, then determining the rate of pollen germination and the length of pollen tube after different periods of cultivating time.
在液体培养基中添加从果梅'月世界'花柱中纯化的S-RNase,并分别于10℃、25℃和35℃条件下培养自花、异花花粉,测定不同培养时间后的花粉萌发率和花粉管生长长度;离体条件下进行果梅花柱S-RNase降解花粉管RNA反应后,用琼脂糖凝胶电泳检测不同温度条件下自花、异花花粉管RNA被降解的程度。
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The results show that: from the subcircuit that is furthest to the heat source to the nearest one,the stability of DRS becomes gradually worse;the stability of RRS is symmetrical,with the subcircuit in the middle of the pipe-network having the worst stability,while,the nearer to the two ends,the better the stability of the subcircuits is.
结果表明,异程系统从离热源最近的支路到最远支路,稳定性依次变差;同程系统的稳定性具有对称性,网路中部的支路稳定性最差,越往两端,支路的稳定性越好;从总体上讲,同程系统的稳定性差于异程系统。
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The trilaminar pattern is specific for the diagnosis of ectopic pregnancy, but it is associated with low sensitivity. The endometrial thickness tends to be thinner in patients with an ectopic pregnancy.
三线型对异位妊娠诊断有特异性,但敏感性低,异位妊娠病人子宫内膜趋向于较薄。
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Drug intervention groups received either daily inhalation of budesonide, ipratropine or heparin respectively, starting on the 8th day or TGF-β1 monoclonal antibody(TB21)0.5 mg twice (6th and 19th day) via the tail veinous injection.
其它各药物干预组于制作模型第8 d起分别雾化吸入布地奈德(布地奈德组,12只)、溴化异丙托品(溴化异丙托品组,12只)和肝素(肝素组,6只)溶液。4周后检测小支气管平滑肌及胶原厚度,用免疫组化法及原位杂交法观察各生长因子在支气管肺内的表达,用放免法检测血清和BALF中细胞外基质成分Ⅲ型前胶原、层粘连蛋白及透明质酸。
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R. Giger in 1979, the menacing star of the Alien series is a unique xenomorphic being.
由H。 R。 Giger于1979设计的异形系列的威胁之星,是一个独特的异形物种。
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R. Giger in 1979, the menacing star of the Alien series is a unique xenomorphic being.
由H。 R。 Giger于1979设计的异形,是一个独特的异形物种。
- 推荐网络例句
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The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.
此刻阴唇已经几乎完全的缝在一起了,排除多余淤血体液的管子和Foley导管从顶端冒出来。
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To get the business done, I suggest we split the difference in price.
为了做成这笔生意,我建议我们在价格上大家各让一半。
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After an hour and no pup, look for continued contractions and arching of the back with no pup as a sign of trouble.
一个小时后,并没有任何的PUP ,寻找继续收缩和拱的背面没有任何的PUP作为一个注册的麻烦。