levorotatory

简明释义

英[ˌliːvəʊˈrəʊtətərɪ]美[ˌlivoˈrotəˌtɔri]

adj. 左旋的

英英释义

单词用法

同义词

反义词

例句

1.Contain concentrated levorotatory vitamin c promote the formulation of collagen assist to reduce fine lines and wrinkles effectively repair damages caused by sunlight or external environment;

含高纯度的左旋维生素c，促进胶原蛋白的产生与合成，帮助减少细纹和皱纹的出现，有效修护和保护因日照或环境影响而导致的肌肤损伤；

2.Contain concentrated levorotatory vitamin c promote the formulation of collagen assist to reduce fine lines and wrinkles effectively repair damages caused by sunlight or external environment;

含高纯度的左旋维生素c，促进胶原蛋白的产生与合成，帮助减少细纹和皱纹的出现，有效修护和保护因日照或环境影响而导致的肌肤损伤；

3.The invention relates to a method for preparing a nanofiber bracket material using levorotatory polylactic acid as matrix.

本发明涉及以左旋聚乳酸为基质的纳米纤维支架材料的制备方法。

4.The compound was found to be levorotatory, indicating that it rotates plane-polarized light to the left.

该化合物被发现是左旋的，表明它将平面偏振光向左旋转。

5.In organic chemistry, a levorotatory isomer can have different properties than its dextrorotatory counterpart.

在有机化学中，左旋异构体的性质可能与其右旋异构体不同。

6.The levorotatory nature of the substance made it crucial for certain pharmaceutical applications.

该物质的左旋性质使其在某些药物应用中至关重要。

7.Scientists often use polarimetry to measure the levorotatory angle of compounds.

科学家们常用偏光仪测量化合物的左旋角度。

8.The levorotatory form of the drug was more effective in treating the condition.

该药物的左旋形式在治疗该疾病方面更有效。

作文

In the realm of chemistry, understanding the behavior of molecules is crucial for various applications, including drug development and synthesis. One of the important concepts in this field is optical activity, which refers to the ability of a substance to rotate the plane of polarized light. This phenomenon occurs due to the presence of chiral molecules, which are non-superimposable mirror images of each other. Among these chiral molecules, some are classified as levorotatory, meaning they rotate polarized light to the left or counterclockwise. This property is significant in distinguishing between different enantiomers—pairs of molecules that are mirror images of one another but differ in their spatial arrangement. The term levorotatory comes from the Latin word 'laevus,' meaning left. When a substance is described as levorotatory, it indicates that when light passes through it, the light waves are rotated in a direction opposite to the clock's hands. This characteristic can be measured using a polarimeter, an instrument designed to quantify the angle of rotation caused by a sample. Understanding whether a compound is levorotatory or dextrorotatory (which rotates light to the right) is essential for chemists because enantiomers can have vastly different biological activities. For example, one enantiomer of a drug may be therapeutically beneficial, while its counterpart could be ineffective or even harmful. In practical applications, the distinction between levorotatory and dextrorotatory compounds can have profound implications. In the pharmaceutical industry, the development of drugs often involves creating and testing various enantiomers to determine which one has the desired therapeutic effect. For instance, the painkiller ibuprofen has both a levorotatory and a dextrorotatory form, but only the levorotatory version is effective in alleviating pain. This highlights the importance of chiral chemistry in drug design and the necessity of precise characterization of molecular properties. Moreover, the impact of levorotatory substances extends beyond pharmaceuticals. In the food industry, certain flavor compounds exhibit optical activity, and their levorotatory or dextrorotatory nature can influence taste perception. For example, the sweet taste of sugars is often associated with their specific chiral forms, which can be levorotatory. Understanding these properties allows food scientists to create products that appeal to consumers' tastes more effectively. In conclusion, the concept of levorotatory is fundamental in the study of chiral molecules and their interactions with polarized light. Its significance spans multiple fields, including chemistry, pharmacology, and food science. By grasping the implications of levorotatory compounds, scientists and researchers can harness their unique properties to develop innovative solutions and enhance our understanding of molecular behavior. The ability to differentiate between levorotatory and dextrorotatory substances is not merely an academic exercise; it is a practical necessity that shapes the future of various industries and the well-being of society.

在化学领域，理解分子的行为对各种应用至关重要，包括药物开发和合成。这个领域中的一个重要概念是光学活性，它指的是物质旋转偏振光平面的能力。这种现象是由于手性分子的存在，这些分子是彼此不可叠加的镜像。在这些手性分子中，有些被归类为左旋，意味着它们将偏振光向左或逆时针方向旋转。这个特性在区分不同的对映体（彼此是镜像但在空间排列上有所不同的分子对）时具有重要意义。 左旋一词源于拉丁语“laevus”，意为左。当一种物质被描述为左旋时，这表明当光穿过它时，光波在时钟的指针相反的方向上旋转。这个特性可以通过偏振仪来测量，这是一种旨在量化样品引起的旋转角度的仪器。理解一个化合物是左旋还是右旋（向右旋转光线）对化学家来说至关重要，因为对映体可能具有截然不同的生物活性。例如，一种药物的一个对映体可能具有治疗效果，而其对应的对映体则可能无效甚至有害。 在实际应用中，左旋和右旋化合物之间的区别可能具有深远的影响。在制药行业，药物的开发通常涉及创建和测试各种对映体，以确定哪一种具有所需的治疗效果。例如，止痛药布洛芬有左旋和右旋两种形式，但只有左旋版本在缓解疼痛方面有效。这突显了手性化学在药物设计中的重要性，以及精确表征分子特性的必要性。 此外，左旋物质的影响不仅限于药物。在食品行业，某些风味化合物表现出光学活性，它们的左旋或右旋特性可能会影响味觉感知。例如，糖的甜味通常与其特定的手性形式相关，这些形式可能是左旋的。理解这些特性使食品科学家能够更有效地创造出吸引消费者口味的产品。 总之，左旋的概念是研究手性分子及其与偏振光相互作用的基础。它的重要性跨越多个领域，包括化学、药理学和食品科学。通过掌握左旋化合物的含义，科学家和研究人员可以利用它们独特的特性来开发创新解决方案，并增强我们对分子行为的理解。区分左旋和右旋物质的能力不仅仅是学术上的练习；它是塑造各个行业未来和社会福祉的实际必要条件。