Self-Organization of Urea-Based Oligomers from Structure to Function

1 Introduction The remarkable and highly diverse biological activities exhibited by proteins rely on the unique capacity of these intrinsically flexible α-polypeptide chains to fold into well ordered and compact structures. The formation of protein tertiary and quaternary structures is attainable only with a small set of distinct secondary structural elements : i) sheets, ii) helices, and iii) turns.1IntroductionThe remarkable and highly diverse biological activities exhibited by proteins rel…     

大环化合物的修饰对区别金属离子的影响

文章阐明了LeonardF．Lindoy等人关于区别金属离子的研究方法。其主要内容为对配体进行调节、修饰，改变配体类型，使与配体络合的金属离子得到区分，还运用所得出的规律，预测金属离子与配体的配位化学情况。     

Enantioselectivity of the Musk Odor Sensation

1 Introduction Chiral recognition of substrates is one of the most characteristic phenomena of biological activity. And one of the most fundamental biological activities of chemical substances is their smell. In 1991, Linda Buck and Richard Axel~([1]) discovered a large multigene family that en codes odorant receptors, for which they were awarded the 2004 Nobel Prize in Medicine and Physiology. These odorant receptors are highly homologous, consist of ca. 320 amino acids, and show a heptah…     

Self-Organization of Urea-Based Oiigomers from Structure to Function

The remarkable and highly diverse biological activities exhibited by proteins rely on the unique capacity of these intrinsically flexible α-polypeptide chains to fold into well ordered and compact structures. The formation of protein tertiary and quaternary structures is attainable only with a small set of distinct secondary structural elements ： i） sheets, ii） helices, and iii） turns.     

氮氧杂大环—N—乙酸配体及其镧系元素配合物的合成与研究

本文报道了两种新型-N-乙酸取代氮氧杂大环的合成,并制得了它们的三价镧系离子的固体配合物(P_m除外),所有这些配合物都进行了元素分析,红外光谱,电导测定以及热分析等手段的表征。     

Syntheses of N-substituted dinaphtho macrocyclic compounds

The syntheses of 5 new 17-membered macrocycles containing naphthalene ring are reported. The macrocycle ring in each of these new ligands contains an O₂N₃-donor set. Structures of these new compounds were characterized by IR,¹H NMR, MS and elemental analysis. Foundation item: Supported by the National Natural Science Foundation of China(No. 107970433) Biography: NIU Chang-rong(1938-), female, Professor.     

Polyacetal-New Developments from an Industrial Point of View

1 Results Polyacetal (Polyoxymethylene,POM) is one of the big five Engineering Thermoplastics (ETP) which are beside POM,polyamides,polycarbonates,polyesters and polyphenyleneethers.Due to a balanced property profile (hardness/stiffness and toughness combined with good chemical,thermal and electrical properties) as well as excellent processing behaviour,polyacetals are widely used across all industry segments.Although the large-scale manufacturing processes are well-known and broadly published and paten...