stereospecific

简明释义

英[ˌsterɪəspɪˈsɪfɪk]美[ˌstɪərioʊspəˈsɪfɪk]

adj. 立体定向的

英英释义

单词用法

同义词

反义词

例句

1.The results indicate that the polymerization mechanism is coordination polymerization and the polymer has stereospecific structure.

结果表明，聚合体系符合配位聚合的机理，聚合物结构具有一定的有序性。

2.Some reactions resulting in stereospecific products are elucidated as well.

对能生成立体专一产品的反应予以了特别的说明。

3.The enzymes or enzymatic systems which are present in a single microorganism can be used for directed stereospecific and regiospecific chemical reactions.

这些酶或微生物在一个单一的酶系统，目前可用于立体定向和regiospecific化学反应。

4.Some familiar stereospecific reactions appear in Table 12.1.

某些类似的立体专一反应示于表12.1中。

5.Particularly, general approaches to the formation of asymmetric glycerophospholipid skeletons by utilizing stereospecific reactions and chiral precursors are dis — cussed.

着重讨论了利用不对称反应和手性前体合成不对称甘油型磷脂骨架的方法。

6.The ability of LOX products to initiate the synthesis of different signaling molecules is determined by the positional and stereospecific nature of the hydroperoxides produced.

脂氧合酶催化反应生成的氢过氧化物促使信号分子形成的能力与该氢过氧化物的位置特异性及立体旋光性有关。

7.The enzyme exhibits stereospecific activity, favoring one enantiomer over the other.

该酶表现出立体特异性活性，优先选择一种对映体。

8.The reaction was found to be stereospecific, producing only one isomer of the product.

该反应被发现是立体特异性的，只产生一种异构体的产物。

9.This polymerization process is stereospecific, leading to a highly ordered structure.

这种聚合过程是立体特异性的，导致高度有序的结构。

10.Chemists are interested in stereospecific reactions because they can create more effective drugs.

化学家对立体特异性反应感兴趣，因为它们可以创造更有效的药物。

11.In asymmetric synthesis, achieving a stereospecific outcome is often the goal.

在不对称合成中，达到立体特异性的结果通常是目标。

作文

In the realm of chemistry, the term stereospecific refers to a type of reaction that leads to the formation of specific stereoisomers. Stereoisomers are compounds that have the same molecular formula and sequence of bonded atoms but differ in the three-dimensional orientations of their atoms in space. Understanding stereospecific reactions is crucial for chemists, especially when designing molecules for pharmaceuticals or other applications where the spatial arrangement can significantly affect the properties and reactivity of the compound.One of the most prominent examples of stereospecific reactions is the synthesis of certain drugs. For instance, consider the case of thalidomide, a drug that was used in the late 1950s and early 1960s as a sedative and later found to cause severe birth defects. The drug exists as two enantiomers, which are mirror images of each other. One enantiomer was effective as a sedative, while the other caused harmful effects. This tragic example underscores the importance of stereospecific synthesis in the pharmaceutical industry, where the wrong stereoisomer can lead to disastrous consequences.Moreover, stereospecific reactions can also be observed in polymer chemistry. When polymers are synthesized, the arrangement of the monomers can determine the physical properties of the resulting material. For example, isotactic polypropylene, which has a specific stereochemical arrangement, exhibits different mechanical properties compared to atactic polypropylene, which has a random arrangement of the monomers. This difference highlights how stereospecific polymerization can lead to materials with tailored properties for specific applications.In addition to its applications in chemistry and materials science, the concept of stereospecific is also relevant in biochemistry. Enzymes, which are biological catalysts, often exhibit stereospecific activity, meaning they will only catalyze reactions involving specific stereoisomers of substrates. This specificity is vital for metabolic pathways, as the wrong stereoisomer could disrupt biochemical processes and lead to disease.The study of stereospecific reactions is not just an academic exercise; it has real-world implications that affect various industries, including pharmaceuticals, agriculture, and materials science. As research continues to advance, the ability to control stereospecific outcomes in chemical reactions will enable scientists to develop more effective drugs, create innovative materials, and improve agricultural practices.In conclusion, the concept of stereospecific is fundamental to understanding the behavior of molecules in chemical reactions. Its significance spans multiple fields, showcasing the interconnectedness of chemistry with real-life applications. By mastering the principles of stereospecific reactions, we can harness the power of chemistry to address some of the most pressing challenges facing society today.

在化学领域，术语立体特异性指的是一种反应，导致特定立体异构体的形成。立体异构体是具有相同分子式和键合原子序列但在空间中原子的三维取向不同的化合物。理解立体特异性反应对化学家至关重要，尤其是在设计药物或其他应用的分子时，其中空间排列会显著影响化合物的性质和反应性。一个显著的立体特异性反应的例子是某些药物的合成。例如，考虑一下沙利度胺的案例，这是一种在20世纪50年代末和60年代初用作镇静剂的药物，后来发现会导致严重的出生缺陷。该药物存在两种对映体，它们是彼此的镜像。一个对映体作为镇静剂有效，而另一个则导致有害的效果。这个悲惨的例子强调了在制药工业中立体特异性合成的重要性，因为错误的立体异构体可能导致灾难性的后果。此外，立体特异性反应也可以在聚合物化学中观察到。当合成聚合物时，单体的排列可以决定所产生材料的物理性质。例如，等规聚丙烯具有特定的立体化学排列，表现出与无规聚丙烯不同的机械性能。这个差异突显了立体特异性聚合能够导致具有特定应用的材料的能力。除了在化学和材料科学中的应用外，立体特异性的概念在生物化学中也很相关。酶，即生物催化剂，通常表现出立体特异性活性，意味着它们只会催化涉及特定立体异构体底物的反应。这种特异性对代谢途径至关重要，因为错误的立体异构体可能会干扰生化过程并导致疾病。对立体特异性反应的研究不仅仅是学术练习；它具有影响多个行业的现实世界意义，包括制药、农业和材料科学。随着研究的不断进展，控制化学反应中的立体特异性结果的能力将使科学家能够开发更有效的药物、创造创新材料并改善农业实践。总之，立体特异性的概念是理解化学反应中分子行为的基础。它的重要性跨越多个领域，展示了化学与现实应用之间的相互联系。通过掌握立体特异性反应的原理，我们可以利用化学的力量来解决当今社会面临的一些最紧迫的挑战。