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Firstly, an invasive species must be invasive enough in itself or has some biological distinction, such as quantitative and qualitative differences in the genome, or patterns of recombination. Secondly, to invade successfully, a new environment for an invasive species must be invasible, and this we may call the ecological basis of invasion. An invasive species may need to establish new interactions with other species, especially those mutualistic relations such as animal related pollination, seed dispersal by animals, mycorrhizal fungi, and symbioses between plants and nitrogen fixing bacteria.

首先从其自身来说,需要有足够的入侵性,这可以认为是入侵种的生物学基础,可能表现为具有多倍性、一定的遗传变异、杂合性或表型可塑性,以及不同的交配系统等;其次一个物种的入侵成功还取决于入侵生境的可入侵性,这可以认为是入侵种的生态学基础,而新的种间关系的形成,尤其是入侵种与其他种类的互惠共生关系的建成是关键。

Methods Magnetic resonance imagings of pelvis and femur were performed on 28 adult patients first diagnosed as acute granulocytic leukemia and 16 diagnosed as chronic myeloblastic leukemia based on morphology,immunophenotype and cytogenetic analysis. Twenty age-matched healthy volunteers were selected as controls. Results MRI of bone marrow in all patients were obviously different from those in controls.

方法搜集经细胞形态学、免疫学及遗传学分型综合分析确诊的成人初诊急性粒细胞白血病28例及慢性粒细胞白血病16例,所有患者均行骨盆及股骨中上段MRI检查,选取20名年龄匹配的健康志愿者作为对照组。

So far transgenic knockout models of AQP1, AQP3, AQP4 and AQP5, and a knock-in model introducing a point mutation (T126M) that causes autosomal recessive nephrogenic diabetes insipidus in human have been successfully established. Significant progresses have been made in characterizing the physiological functions of these AQPs by systematic mouse phenotype studies.

目前AQP1、3、4、5基因敲除和AQP2基因点突变的基因敲入小鼠模型(模拟人类常染色体隐性遗传尿崩症)已成功建立并广泛用于表型研究,在AQP水通道蛋白生理功能方面获得许多重要进展。

Mutant mice than in wild-type controls, and tetrodotoxin or bicuculline application abolished the difference between the genotypes. Studies on human oligodendroglioma cells revealed that GABA played a protective role on Ca〓 overload induced by OGD or glutamate and phaclofen, GABA〓 receptor antagonist, could significantly block the protection.

结果表明:①电凝大脑中动脉后Ca〓2.3-/-鼠脑梗死率和缺血后运动障碍明显重于Ca〓2.3+/+鼠;②Ca〓2.3-/-鼠海马脑片CA1区缺氧后钙超载明显高于Ca〓2.3+/+鼠;③Na〓通道阻滞剂TTX和GABA〓受体阻断剂bicuculline可显著缩小遗传表型之间的差异;④GABA对缺氧无糖及谷氨酸所致的人胶质细胞瘤细胞Ca〓超载有明显的保护作用,此作用可被GABA〓受体阻断剂phaclofen拮抗。

Objective To investigate the clinical, genetic and pathological features of familial chronic progressive external ophthalmoplegia type of mitochondrial myopathy.

目的 探讨家族性慢性进行性眼外肌瘫痪型线粒体肌病的临床、遗传和病理特点。

Since Watson and Crick have brought forward the model of DNA helix structure and explain about it's reproduce mechanism in molecule level, research work concerning DNA has been continuously lucubrated. However, whether translating inheritance information and rebuilding DNA molecule via menstruating DNA sequence, or to date the most compelling gene project, chromosome protract et. al, there all need a sort of molecule scissors cleaving DNA, DNA cleavage reagent. At present, tool enzyme of cleaving DNA is mostly DNA restriction enzymes founded in 70 years, which only cleave DNA at specific 4-8 base pair sequences that are usually palindromic, so this restricts the at very fast speed developing of gene technology at certain extent.

自从Watson和Crick提出DNA的双螺旋结构并对其复制机制在分子水平上进行解释后,使得对DNA的研究不断深入,但无论是通过测定DNA的序列来破译遗传信息、改造DNA分子,还是目前最令人关注的基因工程、染色体绘制等,都需要一种断裂DNA分子的&剪刀&——DNA断裂试剂,目前断裂DNA的工具酶主要是上个世纪70年代发现的DNA限制性内切酶,但所知的Ⅱ型限制性内切酶的DNA序列识别长度较短(约为4~8个碱基对),而且一般要求回文结构,这就给飞速发展的基因工程技术带来一定的限制。

But they added that the genotoxic and phenotypic effects clearly require further studies ...

&但他们又说,&遗传和表型的影响显然需要进一步的研究。。。

AbstractThe endothelial corneal dystrophiesresult from primary endothelial dysfunction,which are genetically and phenotypically heterogeneous.

角膜内皮营养不良endothelial corneal dystrophy,ECD)是由原发性角膜内皮功能紊乱引起的一种角膜营养不良,其遗传方式和临床表型都具有异质性的特点。

Photooxidative characteristics and physiological mechanism in leaves of super high yielding hybrid rice Peiai 64S/E32 and its parental lines were investigated by photooxidative treatment mediated with 200 μmol/L of exogenous methyl viologen under a PPFD of 2 000 μmol·m -2 ·s -1 for 1 h.

结果表明相对于含有粳稻成分的母本和高产子代而言,籼稻父本是光氧化敏感型,而子代超高产水稻耐光氧化的特性主要受含粳稻成分的籼稻母本的遗传控制。

The research results indicated that in the genetic background of weak photo-sensitivity of flowering, photoperiodic sensitive genic male sterility and fertility restoration were controlled by two sep...

结果表明,在弱感光型遗传背景下光敏不育性及其育性恢复受两对独立的细胞核隐性主基因控制和修饰基因的作用。

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And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47:5 法老对约瑟说,你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

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