网络环境下科研人员如何防范投稿风险

分析了网络环境下非法科技期刊的特征,从期刊刊号的鉴别、核心期刊的认定、非法期刊的录用特点、投稿期刊的流程等方面探讨了期刊投稿时的防范措施,为科研人员网络投稿提供参考与借鉴。     

学术论文写作流程与写作技巧

学术论文不同于一般的文章、札记或评论,是一种用来表述学术研究成果的文章体裁。学术论文写作应从选题原则、资料积累与资料运用及研究的原则与方法、学术论文写作规范等方面进行认真把握。本文探讨有关写作技巧,指出写作时应注意的事项。     

从香菇中提取抗癌活性成分——香菇多糖

采用水醇法从香菇中提取多糖成分经凝胶柱层析和水解产物纸层析,初步鉴定提取为葡聚糖组成。     

Nondestructive determination of paper properties of Populus × euramericana with near infrared spectroscopy

Five Populus x euramericana wood samples representing three different sites were selected and nearinfrared （NIR） spectra were obtained. For these sections, basis weight, brightness and three mechanical properties （tensile index, tearing index and bursting index） were determined by standard analytical methods. Calibrations were developed for each paper property using the NIR spectra, data on paper properties, using partial least squares （PLS） regression. The results show that the coefficients of correlation of calibration and validation for basis weight were 0.8824 and 0.8299, respectively; the standard error of calibration （SEC） and prediction （SEP） were 1.150 and 1.170, respectively. In testing for brightness, the correlation coefficient of calibration was 0.9621 and for validation 0.9612, while the SEC and SEP were 0.997 and 1.300, respectively; paper brightness and NIR spectroscopy were highly correlated. NIR spectroscopy can be used to predict tensile, tearing and bursting indices of paper samples rapidly. We found that the paper properties fitted by NIR and GB methods were highly correlated. The coefficients of correlation of calibration and validation for basis weight exceeded 0.8000, while the SEC and SEP were very small. These results reveal that the five paper properties of Populus x euramericana and those predicted by the NIR model were highly correlated. We conclude that the NIR models can be used for the prediction of paper properties.     

The pulp and paper properties of Sirex noctilio infested and fire-damagedthermomechanically pulped,South African grown Pinus patula

Pinus patula is the softwood species most extensively planted in South Africa. However, large portions of these plantings are under threat from Sirex noctilio infestation and occasional forest fires. In this exploratory investigation, the effects of tree age, Sirex noctilio infestation and fire damage to wood from Pinus patula trees on their pulp and paper properties were evaluated. Pulp was produced using the thermomechanical pulping (TMP) process. The energy consumption required to pulp the different pulpwood materials was determined. Pulps were beaten for five different time periods to investigate the development of the fibre properties in response to increasing energy input. Paper properties such as burst, tear strength and breaking length were determined on handsheets manufactured from unbeaten and beaten pulps. Box and line plots and canonical variate analysis biplots were used to statistically analyse the data. It was found that the burst strength of paper produced from healthy trees was significantly higher than that from sirex-infested or fire damaged (burnt) trees. Similarly, the tear strength of paper from healthy and burnt trees was significantly better than from sirex-infested or young trees. No significant differences in breaking length were evident between the pulpwood materials and an increase in beating time did not lead to any improvements. From this study it can be concluded that wood from dead or dying, sirex-infested and young trees produced paper with consistently lower strength properties compared to wood obtained from healthy 12-year-old trees.     

玉米纸筒秧苗移栽机的研究

玉米纸筒秧苗移栽是一项有别于传统直播的新型栽培技术,采用人工大棚内纸筒育苗、适龄秧苗移栽的方式有效提高玉米生产期,彻底解决春季干旱、病虫害对玉米产量和品质的影响,增产增收效果明显。玉米纸筒育苗移栽机克服人工移栽劳动强度大、移栽效率低和作业质量不标准的显著缺点,为玉米标准化、机械化、自动化提供机具载体保证。该机设计了具有自动给苗、剔苗、补苗功能的上秧摆苗机器人系统,可实现纸筒秧苗的自动抓取分离及码放,秧册自动进给,自动剔除无苗、弱苗纸筒及加速补苗等功能,整机采用全液压驱动系统及以PLC为核心的自动控制系统。该机将自动取秧、数字识别无苗纸筒并自动剔除,有苗纸筒带式水平输送和垂直接力输送、垄上破茬开沟、零速投苗栽植、垄型整理、滤水覆土等作业有机地整合在单台移栽机上一次完成,大大提高了作业效率,实现玉米纸筒秧苗移栽作业的标准化、机械化和自动化。     

淳安县林业总场科技创新状况调查研究

改革开放以来,特别是近30年,淳安县林业总场(淳安县新安江开发总公司)先后获得了浙江省林业厅以上科技奖53项,在林木种业、生态建设、产业发展等方面有所创新。完成30项专利和4项技术规范,涉及林下经济、森林防火、森林抚育、苗木培育、森林康养,特别是生态修复、经济林栽培等森林保护与利用的多个领域。发表科技论文402篇,专著5部,在森林培育、生态保护、调查规划和开发利用等方面均有理论研究与实践总结。在大众创新,万众创业的当下,淳安县林业总场要以千岛湖林业生态安全和产业市场需求为导向,加大对科技创新薄弱环节补齐短板的工作力度,加强青年人才队伍建设,加大对林业科技的投入,提高国有林场员工创新、创业的积极性,促进科技成果转化和推广应用,推进国有林场可持续而又充满活力地发展。     

废纸在人造板领域中的回收利用技术及研究进展

综述了国内外利用回收废纸制造人造板技术研究进展,分析了废纸在人造板领域回收再利用技术的发展趋势,阐述了废纸与木质材料制备复合材料存在的三大问题,并提出了对策。     

广东省科技工作者学术影响力研究——基于1978-2008年SCI的统计分析

利用文献计量学方法,采集1978-2008年SCI数据库中收录广东省科技工作者论文的数据,对广东省科技工作者SCI论文的生产力、影响力、创新力进行统计分析,从中获得广东省科学研究有重要学术影响力的学者。     

园艺学中文核心期刊高被引论文分析

对入选2017年版《中文核心期刊要目总览》的10种园艺期刊高被引论文进行统计分析,选择期刊发文被引频次前50位遴选法确定了500篇园艺学高被引论文。2009—2018年10种园艺期刊高被引论文中,发表年限主要集中在2009—2013年;高被引论文绝大部分都有基金资助,基金主要来源于国家级、部级和省级;高被引论文发文作者主要分布于北京、辽宁等9个省区,2~8位作者合著论文占比92.8%,其中以合作者5人居多,合作机构以2~3个机构合作为主;作者以博士研究生学历、高级职称的科研工作者为主。被引频次超过100次的22篇文献主要刊载于《园艺学报》《中国蔬菜》《果树学报》《北方园艺》4种期刊上,主要源于高校(20篇),近半数(10篇)为综述类论文。编辑在选题策划时若有意识地组织业内有影响力的作者撰写综述,对提升刊物影响力有正向作用。