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31. A series of researches indicated: direct linkage of heterocyclic to thio-acetic acid is a feasible method for constructing a new material.

32. Four novel difused heterocyclic thioether derivatives were designed and synthesized from 3-hydrosulfo-5-amidogen-1,2,4-triazolo.

33. Structute of nitrogen heterocyclic ring quaternary ammonium salt cationic surfactants was identi fied by mass spectrography, nuclear magnetic resonance spectra, infrared spectra and etc.

34. Hexahydroxy N - containing heterocyclic compound without sulfur and phosphorus was synthesized and its structure was characterized.

35. Specific strains of lactic acid bacteria possessing antimutagenic properties are suggested to remove mutagenic contaminants of foods such as mycotoxin and heterocyclic amine.

36. Certain substituted benzylamino heterocyclic and heteroaryl derivatives have provided unexpected insecticidal and acaricidal activity.

37. The progresses in five - membered heterocyclic metallocene analogic complexes and their application in olefin polymerization are reviewed.

38. And there are 8 kinds of main components in liquid fuel, which belong to higher olefine hydrocarbon, acetylene series, heterocyclic compound and polycyclic organic matter.

39. Expounded in this article is divided into three chapters, which are summarized as follows:1. Epoxide and its derivatives are important triatomic heterocyclic compounds.

40. It is a heterocyclic compound that is found in small amounts in most proteins .

41. The invention discloses a plant of pseudomonad and the application thereof in the biological removal of nitrogen heterocyclic compound.

42. Due to long term application of organic manure and inorganic fertilizers, the portion of N in heterocyclic compound was reduced, while benzene and non-benzene compound was increased.

43. Heroin: Heterocyclic compound, a highly addictive alkaloid derivative of morphine (chemically, it is diacetylmorphine) that makes up a large portion of illicit narcotics traffic.

44. In this paper , two unsaturated alicyclic nitrogen heterocyclic crownethers were synthesized by phase transfer reaction.

45. Association between a heterocyclic compound stimulating lipid and carbohydrate metabolisms and an antioxidant agent for treating obesity.

46. It is a heterocyclic compound, containing a pyridine ring; its chemical formula is C10H14N. Nicotine is the chief addictive ingredient (see drug addiction) in cigarettes and cigars and in snuff.

47. Tetronic acid, tetronic amine and their derivatives are five-membered heterocyclic compounds along with bio- and pharmacological activities.

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48. Heme, a complex heterocyclic compound, is an organic molecule derived from porphyrin with an iron atom at the centre.

49. Tetrazole is the unsaturated energetic heterocyclic compound with high nitrogen content and good stability leading to the high energy yet low sensitivity materials.

50. They are generally part of the nitrogen-containing heterocyclic ring and the biphenyl components, the former is much more varied, while the latter is relatively stable.

51. HH - 3 S is a heterocyclic compound, transparent acidic fluid.

52. By Hull cell test, a kind of anion surfactant and nitrogen heterocyclic compound was chosen as a additive for pulse non-cyanide silver electroplating.

53. This paper describes the applications and the synthetic method of heterocyclic compounds Imidazolidone and Imidazolethione.

54. The heterocyclic compound can be applied in the field of pesticide.