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There are experimental results as follows:(1) Eriophorum comosum Nees shows strong cold resistance in plasmalemma permeability research. The lethal temperature of Eriophorum comosum Nees is the lowest LT_(50 in comparison with another two plants and is lower than -11.5℃ in August 2005 and December 2005; Soluble protein content of each plant is rising before or after cold hardiness. By SDS-PAGE, Protein band is analysed. Band quantity of Eriophorum comosum Nees is the most and its band color is darkest.(2) Soluble sugar content of three plants after cold hardiness are higher than before cold hardiness, moreover soluble sugar content after cold hardiness shows a decline and there is a narrow range in Eriophorum comosum Nees; Free Proline accumulation is changed by cold stress, and cold resistance is relative to free Proline accumulation; chlorophyll content of both three plants, including chlorophyll a, chlorophyll b and chlorophyll a/b, show a decline tendency along with the descent of temperature. Cynodon dactylon is highly sensitive to cold stress.(3) The soil POD and urease activities' absolute value of Erioophorum comosum Nees and Pogonatherum panideumHack were more than that of Cynodon dactylon before or after low temperature stress, especially POD activities.
实验结果表明:(1)在膜透性的研究中,丛毛羊胡子草抗寒性最强,采用电导率法测得半致死温度LT_(50最低,丛毛羊胡子草抗寒锻炼前后半致死温度LT_(50均小于-11.5℃;在可溶性蛋白含量研究中,抗寒锻炼前后三种植物的可溶性蛋白含量均增加,同时采用SDS-PAGE法,通过对蛋白条带分析,以丛毛羊胡子草条带数最多且着色深;(2)在可溶性糖的研究中,三种植物经抗寒锻炼后叶片可溶性糖含量都比抗寒锻炼前高,且经过抗寒锻炼后三种植物可溶性糖均呈下降趋势,丛毛羊胡子草可溶性糖含量下降较小;从游离脯氨酸含量可知,低温的胁迫影响了植物叶片游离脯氨酸的含量变化,植物的抗寒性与游离脯氨酸有关;低温胁迫下三种植物叶绿素含量随着温度的下降,叶绿素含量、叶绿素a、叶绿素b和叶绿素a/b均呈下降趋势,狗牙根对低温胁迫最为敏感;(3)低温锻炼前后,丛毛羊胡子草和金发草的土壤过氧化物酶与脲酶活性的绝对值均大于狗牙根的,特别是过氧化物酶,说明丛毛羊胡子草和金发草的酶活性大于狗牙根的。
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The flood of Yellow River is always the serious trouble of Chinese, and ice flood disaster have the maximum influencing factors and the most complicated flooded theory, it was concluded with ancient adage "the ice flood burst and official innocence" and " estival flood easily prevented and ice flood hardly defended".
黄河的洪水问题一直是中华民族的心腹大患,而黄河冰凌灾害又是影响因素最多、成灾机理最复杂的一种灾害,从&凌汛决口,河官无罪&及&伏汛好抢,凌汛难防&的古谚语即可见一斑。
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Results ①Guttate lesion was predominant in active stage; guttate, nummularis and geogrphic lesion prevailed in steady stage; however, guttate, nummularis, cyclic and zonular lesion were mainly in restoration stage;②The most involved site was the scalp; the calf, elbow and thigh followed; and mucosa, nail and genitals were the least involved.
结果 ①524例寻常型银屑病患者进行期皮损以点滴状居多,稳定期患者以点滴状、钱币状、地图状为主,环状、带状则少见。而退行期则以点滴状、钱币状、环状、带状多见。②103例寻常型银屑病患者皮损的初发部位和421例再发患者皮损的现分布部位均以头皮最多,其次是小腿、肘、大腿等,最少见于粘膜、甲、外生殖器等。
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Hematopoietic stem cells are the principal cell formation in humans and also it has been s...
造血干细胞为人类最早发现的一种干细胞也是目前为止研究最多的一种干细胞。
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Results Among the pre-schoolers,the hyperopia is primarily, specially the complex hypermetropic astigmatism. While among the school-age teenagers,myopia increases obviously,and the complex myopic astigmatism are most.
结果 学龄前儿童以远视眼为主,特别是复性远视散光最为多见,学龄期青少年儿童近视眼明显增多,其中复性近视散光最多。
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Animal liberation ethics is one of the most controversial and influenceable theories in animal ethics, which its delegate is Peter Singer.
以彼得·辛格为代表人物的动物解放论是动物伦理研究中影响最大、争议也最多的主要理论之一。
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If one were to hold some sort of development theory about the emergence of NT Christology, as do R Bultmann, J Knox, RH Fuller, eg, then the most that could be said would be that kenotic theology could at best reflect one of the emerging models.
如果一个人持有某种发展理论的出现,新台币基督一样, R布特曼,强诺克斯,相对湿度富勒,例如,那麼最多可以说将是虚己神学可以在最能反映一个新兴模式。
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Maybe I shouldn't have been so surprised: after all, this is the world's most populous nation I can even imagine enough sturdy limbed helpers being on hand to offer a stream of Paralympians a similar service in the closing days of the Paralympics, when demand to visit the wall is likely to be at its peak.
或许我不应该太吃惊。毕竟这是世界上人口最多的国家。我甚至可以想像,在残奥会来临之际,攀登长城的需求可能达到最高峰,将有足够多的协助者等待着为残疾运动员提供类似的服务。
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With over a million members, the Mapuche is the most populous native tribe in Chile.
有100多万党员,马普切是世界人口最多的原住民族在智利举行。
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That wood was full of rabbit-holes;and in the neatest sandiest hole of all,lived Benjamin's aunt and his cousins-Flopsy,Mopsy,Cotton-tail and Peter
那片树林里到处都是兔子洞。本杰明的姑妈和他的表兄妹——弗洛普西、默普西、棉球尾,还有比得,住在一个最干净、沙子最多的洞里
- 推荐网络例句
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According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.
曝气设备的动力效率在叶轮转速为120rpm~150rpm时取得最大值,此时氧利用率和充氧能力也具有较高值。
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The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.
稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世,形体几无变化。
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When I was in school, the rabbi explained everythingin the Bible two different ways.
当我上学的时候,老师解释《圣经》用两种不同的方法。