此外，左旋和右旋蜗牛可能无法交配，因为它们的扭曲方向不相容。
In addition, perhaps left and right-handed snails cannot mate with each other, having incompatible twist directions.
然而，一些卵壳中会出现反向螺旋的蜗牛，多数情况下是在左旋卵壳中，右旋的出生率惊人地高。
However, some broods possess a few snails of the opposing hand, and in predominantly sinistral broods, the incidence of dextrality is surprisingly high.
如果发现了氨基酸，并且它们普遍表现出同一种偏向性——要么像地球上的氨基酸一样是左旋的，要么是右旋的，那将会格外有趣。
If amino acids are found, it would be especially interesting if they show a prevalence of one type of handedness, either left, like amino acids on Earth, or right.
在实验中，右旋卵子的细胞质注射改变了左旋卵子的形态，但是左旋卵子的细胞质注射不会影响到右旋卵子。
In experiments, an injection of cytoplasm from dextral eggs changes the pattern of sinisterly eggs, but an injection from sinisterly eggs does not influence dextral eggs.
在实验中，用取自右旋卵子的细胞质进行的注射，可改变左旋卵子的模式；用取自左旋卵子的细胞质进行的注射却不能影响到右旋卵子。
In experiments, an injection of cytoplasm from dextral eggs changes the pattern of sinistral eggs, but an injection from sinistral eggs does not influence dextral eggs.
甲基苯丙胺以右旋和左旋两种对映体形式存在。
Methamphetamine exists as two enantiomers, dextrorotary and levorotary.
构成生命体的许多关键分子都有一个特定的导向，或者说是旋向性：脱氧核糖核酸右旋，氨基酸左旋。
Many of the key molecules for life have a specific direction, or handedness: DNA twists to the right, amino acids to the left.
像其他许多分子一样，氟比洛芬酯具有左旋和右旋两种形式。
Like many other molecules, flurbiprofen has a left-handed and a right-handed form.
化学家们在实验室合成有机化合物的时候，常常会得到一堆分子：一半右旋，一半左旋。
When chemists synthesize organic compounds in the lab, they often wind up with a mix of molecules: half are right-handed, and half are left.
在生物化学中，手性是有意义的，如左旋和右旋的物质气味可能不同。
In biochemistry, handedness can matter. Left - and right-handed versions may, for example, smell different.
它不仅携带了右旋和左旋氨基酸，而且还包含几十种生命至始至终从来不会利用的特殊氨基酸。
Not only does it carry both right - and left-handed versions of normal amino acids; it also contains dozens of exotic amino acids that life ended up not using at all.
在生命诞生之时，我们的祖先就作出了选择：糖右旋，氨基酸左旋，这个规律延续至今。
When life arose, our ancestors made some choices. They went with the right-handed sugars, and the left-handed amino acids, a tradition still in effect.
几乎无法想象左旋本身会给左旋者带来任何不利之处。 然而，左旋与右旋蜗牛彼此间实际上并不呈真正的镜像对称....。。
But left- and right-handed snails are not actually true mirror images of one another…
然而现在已经变为右旋占多数的蜗牛种类，其旋向性（壳的螺旋方向）一度也曾均衡分布，在某些种类中，甚至左旋曾占优势。 。
Butt at one time, handedness (twist direction of the shell) was equally distributed within some snail species that have become predominantly dextral or, in a few species, predominantly sinistral.
螺栓向左旋到尽头为最短3秒，向右旋到尽头为最长4他种，每次探测到活动发生时都会重新计时。
Bolt to the left to the end of a minimum of 3 seconds, up to 4 D to the end of his species, each detected event occurs will re-timing.
目的：研究体外循环早期单次肺动脉灌注含左旋精氨酸的低钾右旋糖酐液对肺的保护作用。
Objective: To research the protection of pulmonary artery single perfusion with low potassium dextran (LPD) contains L-Arginine at earlier period of cardiopulmonary bypass (CPB).
结论：本方法可以实现奥硝唑的手性分离，并能应用于左旋奥硝唑原料药中的右旋体杂质的控制。
Conclusion: The method can be used for separating the enantiomers of Ornidazole and controlling of the impurity of dextroisomer in S-Ornidazole substances.
它的分子结构中有一手性碳原子，大量研究结果证明其左旋光学异构体的生理活性比右旋异构体要高很多。
There is a chiral carbon atom in the EAMP's molecule and it has been proved that the S-EAMP has higher biological activity than that of the D-EAMP.
该方程适用于滚子为柱型或锥型凸轮为槽定位或脊定位、单头或多头、左旋或右旋、上转或下转的情况。
The equations is used whether roller is column or cone, cam is in spine or groove location, left or right helical, single head or many heads and how it is turning.
它们的演化受左旋挤压、右旋拉张两种应力场的转换控制。
Their evolution has been alternatively controlled by two kinds of stress field-left lateral compression, right lateral tension.
断裂带自第三纪以来，经历了左旋运动、右旋运动，南北两段的活动性有一定的差异。
Since the Tertiary period, the Red River Fault Zone suffered both of the sinistral movement and dextral movement, but the activities of the north and the south segment were different.
济阳运动的成因，与郯庐断裂从左旋转向右旋的活动密切相关。
The origin of the Jiyang movement is closely related to the transformation of the Tanlu Fault Belt from sinistral to dextral movements.
本文阐述了光的偏振态、左旋光和右旋光等基本概念。
This article explains the fundamental conceptions about the state of polarization of light, the left-handed light and the right handed light.
组间比较两组1个月随访时在颈椎前屈、左屈、右屈、左旋、右旋5个方向的活动度变化值均有统计学意义（P<0.05）。
Compared between groups, cervical anteflexion, left and right lateral bending, left and right rotative activity showed significant difference at the 1 month after treatment(P<0.05).
传感元件为两套楔角相同的左旋和右旋石英光楔。
The sensor consists of two sets of quartz wedges which are respectively right-handed and left-handed with equal angle.
轮烯类化合物的旋光性也遵循右螺旋右旋，左螺旋左旋的螺旋规律。
The optivity of annulene compounds abided by the helix law, that is, right handed helix is D-rotatory and left ha…
结论沙门柏干酪青霉2221可手性转化右旋磷霉素为左旋磷霉素。
Conclusion Dextral-fosfomycin can be chiral biotransformed to levo-fosfomycin by Penicillium camemberti 2221.
结论沙门柏干酪青霉2221可手性转化右旋磷霉素为左旋磷霉素。
Conclusion Dextral-fosfomycin can be chiral biotransformed to levo-fosfomycin by Penicillium camemberti 2221.
应用推荐