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| 1 | 基于作物产量反应和农学效率的推荐施肥方法显示文摘当前农民过量和不平衡施用化肥现象严重,导致肥料利用率降低,影响到农田的可持续利用。因此,发展适合我国农业生产特点的养分管理和施肥方法尤为重要。本文介绍了基于作物产量反应和农学效率的推荐施肥新方法,该方法是以改进的SSNM(Site-specific Nutrient Management)和改进的QUEFTS(Quantitative Evaluation of the Fertility of Tropical Soils)模型参数为指导的养分管理和推荐施肥为原则,同时考虑大、中微量元素的全面平衡,并应用计算机软件技术把复杂和综合的养分管理原则智能化形成可为当地技术推广人员掌握的Nutrient Expert推荐施肥专家系统。Nutrient Expert推荐施肥专家系统在用户回答一些简单问题后就能给出基于作物栽培管理措施的推荐施肥套餐,包括作物种植密度、目标产量、推荐的养分用量及其可选用的物化的肥料用量,同时根据预知的作物生长季节推荐施肥的最佳时间和次数。通过跨区域田间多点验证试验证明,基于作物产量反应和农学效率的推荐施肥方法是一种简单的易于掌握的作物增产增收、提高肥料利用率和保护环境的新方法。 | 何萍 金继运 Mirasol F.Pampolino Adrian M.Johnston | 2012 | 植物营养与肥料学报2012,18,2: | 95 |
| 2 | 中美地磁总强度日变化的分析比较显示文摘利用中国京津地区13个台站、滇西地区3个台站以及美国加州6个台站的地磁总强度观测资料,分析比较了这些台站的地磁总强度日变化及其频谱.结果表明,地磁总强度日变化的形态、日变幅与频谱,在100-200km 的局部范围内基本相同,在500km 大范围则不同.在25°—40°纬度范围内,地磁总强度日变幅的纬度因子约为1—2nT/度. | 詹志佳 姚富鑫 M.Johnston R.MueIler 高金田 | 1992 | 地震学报1992,14,1: | 9 |
| 3 | Brief electrical nerve stimulation enhances intrinsic repair capacity of the focally demyelinated central nervous system显示文摘Our lab has shown that brief electrical nerve stimulation(ES)has a dramatic impact on remyelination of lysophosphatidyl choline(LPC)-induced focally demyelinated rat peripheral nerves,while also inducing an axon-protective phenotype and shifting macrophages from a predominantly pro-inflammatory toward a pro-repair phenotype.Whether this same potential exists in the central nervous system is not known.Thus,for proof of principle studies,the peripheral nerve demyelination and ES model was adapted to the central nervous system,whereby a unilateral focal LPC-induced demyelination of the dorsal column at the lumbar enlargement where the sciatic nerve afferents enter was created,so that subsequent ipsilateral sciatic nerve ES results in increased neural activity in the demyelinated axons.Data reveal a robust focal demyelination at 7 days post-LPC injection.Delivery of 1-hour ES at 7 days post-LPC polarizes macrophages/microglia toward a pro-repair phenotype when examined at 14 days post-LPC;results in smaller LPC-associated regions of inflammation compared to non-stimulated controls;results in significantly more cells of the oligodendroglial lineage in the demyelinated region;elevates myelin basic protein levels;and shifts the paranodal protein Caspr along demyelinated axons to a more restricted distribution,consistent with reformation of the paranodes of the nodes of Ranvier.ES also significantly enhanced levels of phosphorylated neurofilaments detected in the zones of demyelination,which has been shown to confer axon protection.Collectively these findings support that strategies that increase neural activity,such as brief electrical stimulation,can be beneficial for promoting intrinsic repair following focal demyelinating insults in demyelinating diseases such as multiple sclerosis.All animal procedures performed were approved by the University of Saskatchewan's Animal Research Ethics Board(protocol#20090087;last approval date:November 5,2020). | Lydia Ayanwuyi Nataliya Tokarska Nikki A.McLean Jayne M.Johnston Valerie M.K.Verge | 2022 | Neural Regeneration Research2022,17,5: | 3 |
| 4 | State Social Services Contracting: Exploring the Determinants of Effective Contract Accountability显示文摘 | Barbara S.Romzek Jocelyn M.Johnston | 2005 | Public Administration Review2005,,4: | 1 |
| 5 | Listening:TheKey to Early Childhood Music显示文摘 | Kathryn Woodson Barr John M.Johnston | | 0,,16: | 1 |
| 6 | Contracting and Accountability in State Medicaid Reform:Rhetoric,Theories,and Reality显示文摘 | Jocelyn M.Johnston Barbara S.Romzek | | 0,,05: | 1 |
| 7 | Visually Modelling Collaborative Research into Innovative Community Disaster Resilience Practice,Strategy,and Governance显示文摘In 2013 a new collaborative center was established in Wellington, New Zealand to focus on integrating resilience research with the region’s community disaster resilience strategy. An earlier study with parties to this center had indicated that researcher and practitioner groups were divided by attention to their own immediate knowledge and skills, but agreed there was a need to maximize community resilience benefits amongst a regional population. An action research workshop of researchers and practitioners used a visual logic model to focus on the pragmatic benefits of improving community resilience. The visual logic model was used to design research activities that would improve the regional community resilience strategy, which was still in an early implementation phase.Ten of 14 workshop participants were interviewed following the workshop. Statistical content analysis of interview data highlighted certain strengths of the action research process: visual monitoring and evaluation planning was a catalyst for complicated conversations between two very different groups of professionals; and researchers became more focused on practical issues as a result. Other findings suggested that in future collaborative researchgovernance would benefit from wider cycles of strategic intelligence, enhanced research contributions, and the use of different information formats for different purposes.Different formats for different purposes should also be considered when developing and implementing large-scale disaster risk reduction policies and strategies. | Thomas J.Huggins Robin Peace Stephen R.Hill David M.Johnston Alicia Cuevas Muniz | 2015 | International Journal of Disaster Risk Science2015,6,3: | 0 |
| 8 | 人类免疫缺陷病毒感染儿童接受高效抗逆转录病毒治疗后免疫重建的队列研究显示文摘 | Alicia M.Johnston Megan E.Valentine 等 | 2002 | 世界医学杂志2002,6,3: | 0 |