葱内生真菌抑菌活性初探

目的：从葱的根、茎、叶中分离内生真菌,并进行初步抗菌活性检测,得到具有高抗菌活性的菌株。方法：1．用PDA培养基分离葱的内生真菌;2．用查氏培养基进行发酵实验。3．进行滤纸片抑菌实验。结果：从葱中分离出的17株内生真菌,均具有抗菌活性,其中,抑菌圈直径大于1．0cm的高抗菌性菌株有11株,占总分离菌株数的64．71％。结论：葱内生真菌具有类似宿主植物葱一样的广泛抗菌性（分离得到的17株内生真菌均具有抗菌性）,但由于宿主植物本身所具有的强抗菌性,使分离得到的菌株种属多样性较少。     

Finding and explaining differences: A reply to Gudykunst and Hammer

A rejoinder to Gudykunst and Hammer's critique of a recent paper is presented. We argue that their position is based on two mutually exclusive propositions and cannot therefore be credible. We continue to maintain that the evidence on intercultural effectiveness shows both culture-general and culture-specific components.     

词汇联想实验下的二语心理词汇动态分析——以某高校英语专业低年级学生为研究对象

以二语词汇联想实验为主要研究手段,以某高校英语专业基础阶段的两个年级学生为研究对象,探寻了中国英语学习者的二语心理词汇在不同阶段存在的异同,从而发现其发展变化特点,即：呈现出逐渐优化的趋势,反映出随着二语词汇习得量与质的提升,心理词汇意义联系逐渐加强;这也同时促进二语词汇的习得,互为作用与反作用,打破词汇僵化。     

旅顺博物馆藏两件高昌王麹乾固供养写经残片探析

旅顺博物馆带有供养人题记的两件汉文抄经残卷,经核查考订,一件为东晋鸠摩罗什所译《仁王经》的片段,另一件为北凉昙无懺所译《金光明经》的片段。两部佛经均为佛教著名的护国经典。通过对题记部分的辨识,结合文献和其他出土文物,进一步确定了两件抄经的供养人均为麹氏高昌国的七世王麹乾固。上述两件写经残卷的发现,为新疆历史文化的研究提供了新材料。     

汉语对云南少数民族学生第三语言(英语)习得的影响研究——以楚雄师范学院、东兴中学、紫溪中学等学校的少数民族学生为例

近年来,三语习得研究逐渐成为了语言学研究的热点之一。所谓三语习得,指的是除了学习者的母语和已经掌握的第二语言之外,目前正在学习的一种或多种语言。本文以云南省楚雄师范学院、东兴中学、紫溪中学等学校的少数民族学生为样本,对他们的第二语言(汉语)在其第三语言(英语)习得中的影响进行了研究。结果发现:(1)少数民族学生的L2(汉语)对他们的L3(英语)习得具有负迁移作用;(2)L3这种影响影响不仅停留在语音、词汇、语法和句型上,同时也会对L3习得中的听力、口语、阅读、写作及翻译产生负迁移影响:(3)有效的教学策略和学习策略将有利于减少L2对他们的L3习得的负迁移影响,并在很大程度上有利于他们的英语学习。     

The bilateral benefits of providing and receiving peer feedback in academic writing across varying L2 proficiency

Although the effectiveness of peer review has been examined, few have tested the joint benefits of providing and receiving feedback features and quality in L2 contexts. The present study investigated variation in key features and quality of feedback provided and received by high and low L2 proficiency students and its benefits on revision in the authentic setting of students experiencing both roles of providing and receiving peer feedback in English academic writing. Analyses on two drafts from 50 students, 1356 idea units of anonymous implementable peer feedback and back-evaluation ratings revealed that the combined effect of providing and receiving feedback on revision was prominent for all students. But the bilateral benefits of providing and receiving feedback features were more significant for high proficiency students, while providing feedback features and quality benefited low proficiency students more. The study implies that students need more bilateral training with both providing and receiving feedback.     

密度对车前草生长的影响

以车前草为实验材料,研究不同密度(5棵/盆、8棵/盆、10棵/盆)对车前草生长状况的影响。实验表明,随着车前草密度的增大,其植株高度,叶柄高度,叶片高度也随之增加;根长,根重,叶重随着密度的增大而减小,而叶宽没有明显的变化。     

教育财务管理信息系统设计

为提高学校的信息化管理水平,本文结合学校的业务需求和实际工作情况,研究并设计了适合学校的"教育财务管理信息系统",以期提高学校自身的财务管理效率,为学校的各项行政管理活动以及教学管理提供相关保障,从而促进学校更快更好地发展。本文基于软件工程面向对象的思想,采用统一建模语言UML进行财务管理系统的分析、设计和实现。     

酸浆宿萼总皂苷对小鼠免疫活性的影响

本文以干燥的酸浆宿萼为实验材料,经乙醇回流提取,并通过溶剂萃取和大孔树脂进一步分离得到酸浆宿萼皂苷(TSP)。以不同剂量TPS连续20天对正常小鼠进行灌胃,探讨了TPS对小鼠免疫活性的作用。结果表明:高剂量(40mg/m L)的TPS溶液能极显著的增加小鼠的免疫器官指数(P0.05)和巨噬细胞吞噬指数;免疫球蛋白(Ig G)含量,P0.01;改善血常规指数。而低剂量(5mg/m L)的TPS溶液对小鼠上述指标有显著的正面影响,P0.05。总体上,在实验浓度范围内,TPS具有增强小鼠免疫活性的作用且呈剂量依赖性。     

Open access to data: An ideal professed but not practised

Data-sharing is an essential tool for replication, validation and extension of empirical results. Using a hand-collected data set describing the data-sharing behaviour of 488 randomly selected empirical researchers, we provide evidence that most researchers in economics and management do not share their data voluntarily. We derive testable hypotheses based on the theoretical literature on information-sharing and relate data-sharing to observable characteristics of researchers. We find empirical support for the hypotheses that voluntary data-sharing significantly increases with (a) academic tenure, (b) the quality of researchers, (c) the share of published articles subject to a mandatory data-disclosure policy of journals, and (d) personal attitudes towards “open science” principles. On the basis of our empirical evidence, we discuss a set of policy recommendations.