科技期刊全媒体平台建设思维探究——以金属加工全媒体平台为例

【目的】 通过对金属加工杂志社搭建的全媒体平台(以下简称“金属加工全媒体平台”)特色和建设思维的研究,为科技类期刊的全媒体平台建设提供借鉴。【方法】 采用访谈法、观察法和个案分析法等对金属加工全媒体平台的建设和运营情况进行资料收集、思考和分析。【结果】 金属加工全媒体平台的特色在于它不仅是不断延展的开放式平台,也是优质内容的一站式平台,更是用户导向的服务平台,亦是杂志社主导的共建性平台。【结论】 虽然金属加工杂志社的“大而全型”全媒体平台只是科技类期刊全媒体平台的一种类型,但其平台建设中的差异化思维、用户思维和融合思维具有普适性,可以为其他科技期刊的全媒体平台建设提供参考。     

新疆药用桑树9个栽培群体的RAPD分析

目的 从DNA分子水平上分析新疆药用桑树资源9个栽培群体的遗传关系。方法 从100个随机引物中筛选出10个引物，用这10个引物做RAPD扩增，应用NTSYS软件对扩增结果进行聚类分析。结果 共扩增出108个位点。其中多态性位点91个，多态比例为84．26％，各群体间存在较明显的遗传分化。另外，获得药桑的8个特异位点。结论 RAPD分析结果与新疆药用桑树资源植物的遗传关系的传统划分是基本一致的。     

乌拉尔甘草叶挥发油的化学成分分析

 目的分析乌拉尔甘草叶挥发油的化学成分。方法采用水蒸气蒸馏法提取,运用毛细管气相色谱-质谱联用法结合计算机检索对其化学成分进行分析和鉴定,用气相色谱面积归一化法测定各组分的相对百分含量。结果经毛细管色谱分离出76个峰,并且确认了其中的61种化合物。化学成分主要为十九烷(12.89%),廿烷(12.23%),1-十七烯(12.05%),2,6,11-三甲基-十二烷(7.54%),十八烷(7.46%),E-蒎烷(5.54%),二十二烷(5.30%),二十三烷(4.92%),十六烷基-环氧乙烷(3.09%) 等,上述9种化合物的含量占挥发油总量的71.02%。结论首次报道了乌拉尔甘草叶挥发油的化学成分,为进一步开发利用提供了科学依据。     

清朝官营茶马贸易的衰亡

茶马贸易拥有悠久的历史。基于行为角度的研究,官营茶马贸易在清雍正年间走向衰弱,衰弱的原因和私茶竞争、西北地区地缘形势的改变以及茶马贸易制度等相关。茶马贸易经济行为虽然衰弱了,但茶马贸易中的思想却没有停止,在其它地区的贸易中得以延续。     

Twins with hereditary sensory and autonomic neuropathy type IV with preserved periodontal sensation

Turkish twin brothers affected with hereditary sensory and autonomic neuropathy type IV (HSAN IV) are reported. Their clinical findings were generally typical for HSAN IV. Interestingly they both had preserved periodontal sensation. Mutation analysis of the NTRK1 gene showed a homozygous c.2001C>T substitution in exon 15 in both twins. This base substitution is predicted to change a polar, positively charged amino acid arginine to the highly active amino acid cystein at position 654 (p.Arg654Cys). The parents were heterozygous for the mutation. This mutation has been reported previously in one Japanese and one Arab patients. The preserved periodontal sensation has not previously been reported in patients affected with HSAN IV. This preserved sensation in our patients might have been through Ruffini endings, the periodontal mechanoreceptors which have been reported to be present in TrkA knockout mice. Here we report the first twins affected with HSAN IV and the observation that periodontal sensation is not affected by mutation in NTRK1.     

“中国科技期刊登峰行动计划”入选期刊发展现状及建议

【目的】 通过统计分析“中国科技期刊登峰行动计划”入选期刊的发展现状,为优化资助机制、培育世界一流科技期刊提供参考。【方法】 基于Web of Science的JCR评价数据,运用文献计量法和深度访谈法对入选期刊发展现状和存在问题进行分析并提出建议。【结果】 入选期刊影响因子总体提升不明显,存在片面追求影响因子的倾向;资助的“解渴”“解困”作用明显,但由于期刊国际化办刊思路不清晰,谋划不足,撬动期刊实现世界一流建设目标的杠杆作用发挥得并不充分。【结论】 资助方应通过注重资助效果评估和反馈,清晰资助导向,促进资助效果形成良性循环。期刊方应深入理解“世界一流科技期刊”的建设内涵,把握规律,探索模式,积极进行国际化办刊实践,提升期刊国际影响力。     

Deficits in go/no-go task performance in male undergraduate high-risk alcohol users are driven by speeded responding to go stimuli

Background: Response disinhibition plays an important role in addictive behaviors. However, results of studies on the performance on response inhibition tasks of individuals evidencing potentially problematic levels of alcohol drinking are mixed. Objectives: We assessed conditions under which persons with a relatively high risk of alcohol dependence show inhibition deficits in such tasks and investigated the nature of those deficits. Methods: Fifty-eight male undergraduate students, 27 of which were high-risk drinkers according to the Alcohol Use Disorders Identification Test, performed a go/no-go inhibition task with differing percentages of no-go trials (50% vs. 25%), stimulus presentation times (600 vs. 200 ms), and types of go and no-go stimuli (alcohol related vs. -unrelated). Response inhibition was indexed by response time (RT) to go trials and response accuracy on go and no-go trials. Results: There were no differences between low- and high-risk drinkers on any of the three outcome measures under the 600-ms stimulus presentation condition. Under the 200-ms condition, the high-risk drinkers showed faster RTs to go stimuli, and more errors on both go- and no-go trials than the low-risk drinkers, irrespective of type and percentage of no-go stimuli. However, the accuracy differences between the two groups disappeared after controlling for the RT on go trials, suggesting a speed-accuracy trade-off. Conclusion: High-risk drinkers’ response inhibition deficits are not restricted to alcohol-related cues and are especially likely to occur under conditions prompting fast responding. These findings could be used to inform treatment, suggesting the promotion of strategies aimed at preventing high-risk alcohol users from making quick decisions.