低分子肝素联合丹参注射液治疗早发型重度子前期效果评估

目的探讨低分子肝素与丹参注射液联合用药对早发型子前期(重度)的治疗效果。方法选取我院2008年10月至2012年10月诊断为重度子前期的患者共124例(孕龄在25～34周),随机平均分为四组,每组31例。第一组患者使用常规硫酸镁治疗,第二组患者使用硫酸镁加丹参注射液治疗,第三组患者使用硫酸镁加低分子肝素治疗,第四组患者使用硫酸镁、低分子肝素以及丹参注射液三种药物联合治疗,对比各组相关治疗结果的差异。结果第四组患者的孕龄延长时间和羊水量明显增加,脐动脉S/D值下降,新生儿体重明显增加,新生儿窒息率明显下降,与另外三组比较,差异有统计学意义(P<0.05)。同时第四组患者胎盘的重量有所增加,与第一组比较,差异有统计学意义(P<0.05),与另外两组比较差异无统计学意义。结论联合使用低分子肝素和丹参注射液在早发型的重度子前期治疗效果明显。     

120 kt/a分子筛脱蜡装置的技术经济分析

简要介绍限国内外市场对液蜡的需求现状及分子筛脱蜡装置的产品竞争力。并对中国石油天然气股份有限公司抚顺石化分公司石油三厂120kt/a分子筛脱蜡装置项目的投资。成本进行了概算。同时计算了装置的税收及利润分配，最后分析了企业的盈利能力和偿债能力。     

高管海外经历与企业跨国并购——基于动因视角的研究

以2009—2018年我国沪深两市进行跨国并购的上市公司为研究样本,利用多元回归模型对高管海外经历与跨国并购之间的关系进行实证检验。研究结果表明：高管海外经历有助于提升所在企业的跨国并购意愿,这一结论经过多种稳健性检验后仍然成立;海外经历高管所在企业的跨国并购行为并非是高管的自利行为,而是为提高企业业绩的利他行为,这一结论支持了烙印理论。研究结论既丰富和拓展了高层梯队理论的相关文献,又对企业通过跨国并购实现资源优化配置和践行“一带一路”倡议具有现实的指导意义。     

改革分子生物学实验教学,提高学生综合能力

针对中南林业科技大学分子生物学实验教学的现状,从教学内容、教学方法、考核方式三个方面进行了改革,实验教学水平和教学质量明显提高,学生综合实验能力大大增强。     

燃准东煤过程中含钙矿物质对沉积初始层形成影响研究

准东煤作为一种良好的动力用煤,在燃烧过程中极易出现结渣、沾污问题.煤中高含量的钙是引起灰沉积现象严重的重要原因.本文利用分子动力学计算含钙矿物质在氧化膜孔径中的扩散及结合特性.结果表明,随着氧化膜孔径增加,含钙矿物质运动更加剧烈且反应活性增强.大孔径下含钙矿物质更易填充到氧化膜孔隙,孔径在4nm时,CaO与CaSO4更...     

Managerial academic experience,external monitoring and financial reporting quality

This study examines the effect of managerial academic experience on firms’ financial reporting quality. Using data from China, we find that firms with top managers possessing academic experience exhibit lower levels of both accrual and real earnings management, along with a lower probability of future restatements. This effect is more pronounced for firms with inefficient external monitoring, suggesting that the higher financial reporting quality is mainly explained by the managers’ intrinsic motivation to report truthfully. The results hold when we use firm fixed‐effect regressions, instrumental variable two‐stage regressions, and a propensity score matching (PSM) approach to mitigate the omitted variable and endogeneity concerns. Our study suggests that academic experience can serve as a source of valuable expertise for corporate executives.     

谁在推动数字化？ ——一项基于高阶理论和烙印理论视角的经验研究

高阶理论和烙印理论尽管指出了决策者在制定战略的过程中的影响，但却鲜有研究将二者结合。本文以决策团队为分析单元，使用2016—2020年A股上市公司的样本，以数字化转型战略中的重要表现形式——技术并购为研究情境，检验了高管团队内部的异质性是否会影响企业进行数字化相关的技术收购。研究结果显示：高管团队在年龄、性别构成上对数字化战略的偏好存在差异。进一步地，聚焦高管的烙印特征，本文发现技能性烙印和制度性烙印的差异在影响企业从事数字化相关的技术收购上显著；而经验性烙印则对并购决策没有显著性作用。     

How do Scientists Contribute to the Performance of Innovative Start‐ups? An Imprinting Perspective on Open Innovation

Our study illustrates how scientists contribute to the performance of innovative start‐ups through an analysis of 211 Italian start‐ups with and without scientist founders. Building upon imprinting theory, we hypothesize and find that scientists provide an advantage to innovative start‐ups to the extent that they stimulate open innovation (i.e., search breadth and depth). However, for this to effectively occur, the involvement of multiple scientist founders is needed, so that their career imprints internalized in the lab are successfully transferred to the start‐up. Moreover, if the start‐up embraces business practices (i.e., strategic planning) or departs from scientific logics (i.e., pursuing non‐commercial goals), scientists’ contribution is further increased. Therefore, our study illustrates how the scientist career imprint can provide an advantage to innovative start‐ups with multiple scientists, but also how it can act as a rigidity if the start‐up does not pursue strategic planning or emphasizes non‐commercial goals.