论我国近代企业发展过程中的几个重大变化

对我国企业经营由生产导向转变为市场导向、产品导向转变为顾客导向、营销导向转变为服务导向的重大变化进行了论述。     

健康安全环保(HSE)管理体系在陕北油田的应用

健康安全环保（HSE）管理体系及其在陕北油田钻井中的应用，使该工区钻井达到了零误工时、无井下及设备事故以及没有工伤事故的目标。     

Comparison and analysis of dislocation density, morphology and evolution in microstructure of low-carbon steel produced using different technologies

Three kinds of specimens were produced from hot strips of similar composition and same thickness （nominal gauge 4.0 mm） but produced using different technologies, and the dislocation density of these strips was quantitatively measured by positron annihilation technique test. The dislocation morphology and evolution in microstructure of each pass for producing the 1.9 mm hot strip using CSP （compact strip production） technology were observed under an H-800 transmission electron microscope; its density was also quantitatively measured using the positron annihilation technique test, and the factors influencing the dislocation density during the production process were analyzed. The experimental results show that the dislocation density in the microstructure produced using CSP technology is higher than that in the microstructure produced using conventional technology. This result was discussed and confirmed on the basis of the finite element simulation and the theory relevant to dislocations.     

应用正交试验法研究3，2960菌株的固态分批补料发酵条件

选取了对赤霉素真菌３，２９６０菌株产赤霉素能力有影响的七个因素，即培养时间、培养温度、接种量、培养基的初始ｐＨ值，加入玉米淀粉的时间，加入玉米淀粉的量，取下牛皮纸通气的时间，进行六水平正交试验。其结果表明：培养温度对赤霉素含量影响最大，其它为次要因素，培养基的初始ｐＨ值最不重要。该试验找出了使赤霉素含量达最高时的培养条件。     

轮胎生产企业的经销商政策分析

供过于求、激烈竞争的市场环境使得轮胎生产企业制定好经销商政策显得尤为重要。轮胎生产企业的经销商政策主要包括专营权政策、返利政策、促销政策、客户服务政策等。轮胎生产企业在制定经销商政策时常出现四大误区，在制定经销商政策时，应遵循五大原则。     

浅论油田企业实施清洁生产的途径和意义

清洁生产在我国工业界得到较广泛实施,在广泛吸纳国内外一些清洁生产企业(尤其是油气公司)实践经验的基础上,在思想层次、推行机制层次和技术层次上针对油田企业的清洁生产做了一些探讨,以进一步获得环境绩效的持续改进。     

调整思路完善措施聚全省之力实现三七产业现代化

“三七是南国神草”、“金不换”、“中药之最珍贵者”。云南文山是三七最大，最集中的产地，但至今仍末形成与之相匹配的现代产业结构和规模。文章拟从深层认知三七的经济和社会价值入手，力图在促进三七产业现代化方面为政府决策出谋划策。     

项目教学法在机械制造工艺课程中的探索与应用

简要介绍了机械制造工艺学课程的内容,针对职业技术学院学制短的特点,提出了将项目教学法应用于机械制造工艺课程的设想,并给出了具体的实施步骤。     

Keratinase production and keratin degradation by a mutant strain of Bacillus subtilis

A new feather-degrading bacterium was isolated from a local feather waste site and identified as Bacillus subtilis based on morphological, physiochemical, and phylogenetic characteristics. Screening for mutants with elevated keratinolytic activity using N-methyl-N＇-nitro-N-nitrosoguanidine mutagenesis resulted in a mutant strain KD-N2 producing keratinolytic activity about 2.5 times that of the wild-type strain. The mutant strain produced inducible keratinase in different substrates of feathers, hair, wool and silk under submerged cultivation. Scanning electron microscopy studies showed the degradation of feathers, hair and silk by the keratinase. The optimal conditions for keratinase production include initial pH of 7.5, inoculum size of 2% （v/v）, age of inoculum of 16 h, and cultivation at 23 ℃. The maximum keratinolytic activity of KD-N2 was achieved after 30 h. Essential amino acids like threonine, valine, methionine as well as ammonia were produced when feathers were used as substrates. Strain KD-N2, therefore, shows great promise of finding potential applications in keratin hydrolysis and keratinase production.     

电牵引采煤机在实践中的使用及主要故障分析

通过观察电牵引采煤机在生产实践中的使用情况，分析了电牵引采煤机存在问题的原因，并探讨了解决变频调速控制装置故障的方法及应用效果。