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Silicon reduces cadmium accumulation in Moso bamboo(Phyllostachys edulis)root cell sap by sequestering cadmium in hemicellulose 1

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Pedosphere 2024年第6期34卷 1002-1013页

作者： Yuzhen CHANG Fan YANG Chaofeng YANG Yiting ZHENG Xianyu PAN Shanshan MA Haibao ji ji feng shao State Key Laboratory of Subtropical Silviculture Zhejiang Agriculture and Forestry University Agricultural and Forestry Technology Promotion Center of Lin'an

Moso bamboo is one of the most important economic bamboo species in China, but cadmium（Cd） pollution has become a potential threat of its sustainable development. Silicon（Si） reduces Cd accumulation in many plant species. However, the exact mechanisms of this effect in Moso bamboo are still poorly understood. Here, we investigated the effect of Si on Cd accumulation in Moso bamboo in terms of Cd concentration in roots, Cd cellular and subcellular distribution, root cell morphology, and gene expression. Seedlings（ten days old） were exposed to different concentrations of Cd(0, 1, 5, and 50 μmol L-1) in a 0.5 mmol L-1CaCl2solution treated with（+Si） and without（-Si） 1 mmol L-1Si（as silicic acid） for two days. The effect of Si on the alleviation of Cd-induced inhibition of root elongation was not obvious, but Si could significantly reduce Cd accumulation in roots at all tested Cd concentrations(1, 5, and50 μmol L-1). Cadmium was localized in all cells of roots, but Si application altered the Cd distribution from all cells to distal side of exodermis cells in roots. Semi-quantitative determination of Cd using energy-dispersive X-rays revealed higher Cd concentrations in exodermis, but lower concentrations in the stele when Si was applied. However, Si increased Cd accumulation in root cell wall, but decreased it in cell sap. Moreover, more than 70% of Cd and Si were found in hemicellulose 1 of the cell wall. These results suggested that Si reduced Cd accumulation by sequestering Cd in hemicellulose 1 in the root cell wall at the subcellular level and retaining most of the Cd in the root exodermis at the cellular level in Moso bamboo under short-term Si application.

关键词： apoplast cadmium stress cell wall heavy metal pectin pollution symplast

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检测LCM对数字万用表准确度的要求

现代显示 2009年第2期 56-60页

作者：冀少峰汕头超声显示器有限公司广东汕头515041

测量是质量检验工作的重要组成部分。通过测量可以确定被测量的大小,为质量检验、合格判定提供数据支持。用于测量的测量仪器在其中扮演着重要角色。没有它测量无法进行。但有了它,测量也不见得就可以进行。因为测量仪器有分辨率、准确... 详细信息

测量是质量检验工作的重要组成部分。通过测量可以确定被测量的大小,为质量检验、合格判定提供数据支持。用于测量的测量仪器在其中扮演着重要角色。没有它测量无法进行。但有了它,测量也不见得就可以进行。因为测量仪器有分辨率、准确度之分,不恰当的分辨率、准确度,同样无法准确测量被测量的大小,如果用于测量,反而会因为误测误导使用者作出错误的判定。在液晶显示行业,用于检测液晶显示模组(LCM)的数字万用表,如果选用不当,同样有此隐患。因此选用合适的数字万用表用于LCM检测显得尤其重要。本文侧重分析不同准确度万用表对测量结果的影响,并根据目前LCM行业内对产品设计公差的要求,推算在驱动电压、功耗电流、内阻的检测上对数字万用表准确度的要求,为LCM行业内数字万用表的选用提供参考。

关键词：液晶模块准确度公差测量不确定度

临近高铁侧墙式桩板结构的桩基分布合理性分析

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价值工程 2023年第8期42卷 61-63页

作者：冀少峰中铁上海设计院集团有限公司上海200070

新建高铁路基临近既有高铁路基且填方较高时,为保证既有无砟轨道的变形要求,同时也为了节省土地,新建高铁采用侧墙式桩板结构的地基处理形式,侧墙最近一排钻孔桩至侧墙边缘的距离是筏板配筋的控制性因素。通过建立不同桩基间距的有限元... 详细信息

新建高铁路基临近既有高铁路基且填方较高时,为保证既有无砟轨道的变形要求,同时也为了节省土地,新建高铁采用侧墙式桩板结构的地基处理形式,侧墙最近一排钻孔桩至侧墙边缘的距离是筏板配筋的控制性因素。通过建立不同桩基间距的有限元三维模型进行数值模拟,进而验证既有高铁路基的变形和桩板结构配筋的合理性。最终得出,桩基分布对既有线变形基本无影响,但对板内钢筋的受力影响较大,最外侧桩基至侧墙边缘距离以1.3m为宜。

关键词：侧墙桩板结构桩间距路基数值模拟

维普期刊数据库博看期刊

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氨气对偏振片作用的试验验证

现代显示 2009年第1期 55-59页

作者：冀少峰汕头超声显示器有限公司广东汕头515041

液晶显示器的显示性能,如对比度、亮度等,与所用偏振片的性能有很大关系。随着使用时间的延续,偏振片会老化,其性能也相应下降。如果在不恰当的条件下使用或仓储,偏振片会加速老化,性能会加速下降,甚至完全失效。氨气是一种碱性气体,可... 详细信息

液晶显示器的显示性能,如对比度、亮度等,与所用偏振片的性能有很大关系。随着使用时间的延续,偏振片会老化,其性能也相应下降。如果在不恰当的条件下使用或仓储,偏振片会加速老化,性能会加速下降,甚至完全失效。氨气是一种碱性气体,可能会与偏振片中的有机高分子成分发生化学反应,导致偏振片快速老化。本文侧重通过试验验证氨气对偏振片的影响,对比常见两大系列偏振片受影响的程度,并为行业内偏振片和LCD成品的存储与使用环境提出要求。

关键词：液晶显示器对比度偏振片氨气碘系染料系

Decreased levels of phosphorylated synuclein in plasma are correlated with poststroke cognitive impairment

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Neural Regeneration Research 2025年第9期20卷 2598-2610页

作者： Yi Wang Yuning Li Yakun Gu Wei Ma Yuying Guan Mengyuan Guo Qianqian shao Xunming ji jia Liu Department of Clinical Laboratory Beijing Bo’ai HospitalChina Rehabilitation Research CenterCapital Medical UniversityBeijingChina Beijing Institute of Brain Disorders Laboratory of Brain DisordersMinistry of Science and TechnologyCollaborative Innovation Center for Brain DisordersBeijing Advanced Innovation Center for Big Data-based Precision MedicineCapital Medical UniversityBeijingChina Department of Neurosurgery Xuanwu HospitalCapital Medical UniversityBeijingChina

Poststro ke cognitive impairment is a major secondary effect of ischemic stroke in many patients;however,few options are available for the early diagnosis and treatment of this *** aims of this study were to(1)determine the specific relationship between hypoxic andα-synuclein during the occur of poststroke cognitive impairment and(2)assess whether the serum phosphorylatedα-synuclein level can be used as a biomarker for poststro ke cognitive *** found that the phosphorylatedα-synuclein level was significantly increased and showed pathological aggregation around the cerebral infa rct area in a mouse model of ischemic *** addition,neuronalα-synuclein phosphorylation and aggregation were observed in the brain tissue of mice subjected to chronic hypoxia,suggesting that hypoxia is the underlying cause ofα-synuclein-mediated pathology in the brains of mice with ischemic *** phosphorylatedα-synuclein levels in patients with ischemic stroke were significantly lower than those in healt hy subjects,and were positively correlated with cognition levels in patients with ischemic ***,a decrease in serum high-density lipoprotein levels in stroke patie nts was significantly correlated with a decrease in phosphorylatedα-synuclein *** ischemic stroke mice did not show significant cognitive impairment or disrupted lipid metabolism 14 days after injury,some of them exhibited decreased cognitive function and reduced phosphorylatedα-synuclein *** together,our results suggest that serum phosphorylatedα-synuclein is a potential biomarker for poststroke cognitive impairment.

关键词： biomarker high-density lipoprotein ischemic stroke phosphorylatedα-synuclein poststroke cognitive impairment

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大学英语四级考试听力的特点和应试方法

唐山师范学院学报 2001年第4期23卷 80-81页

作者：吉绍锋河北唐山高等专科学校大学外语部河北唐山063000

针对大学英语四级考试听力部分的特点,考生除了平时严格训练外,还应掌握“看、听、归、记、选”等应试方法。

关键词：大学英语教学四级考试听力考试应试方法

Alkaline leaching mechanism of MSWI bottom ash: the pivotal role of Si(Al) chemical bonding environments

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Science China Technological Sciences 2025年

作者： Ningning shao Zekun jiAO Weipeng feng Yu jiN Fanlong KONG Zhijun DONG Zuotai ZHANG Institute of Technology for Marine Civil Engineering Shenzhen Institute of Information Technology (SZIIT) Guizhou NASH Ecological Technology Co. LTD School of Environmental Science and Engineering Key Laboratory of Municipal Solid Waste Recycling Technology and Management of Shenzhen City Southern University of Science and Technology (SUSTech)

Municipal solid waste incineration bottom ash(MSWIBA) is a complex assemblage of aluminosilicate materials encompassing diverse solid wastes. Thus, its complexity poses great challenges to their resource utilization. For the sake of the alkali activation use of MSWIBA, this work focused on the characterizations and alkaline leaching experiments of various classified MSWIBA after sorting. Among the different categories of MSWIBA, waste glass(BA-G) and other unidentified slags(BA-O) were identified as potential precursors for alkali activation use. The alkaline leaching experiments proved that alkaline concentration, reaction temperature, reaction time, and raw material classification influenced the leaching process and results. Among these, the Si/Al chemical bonding environments from the material type played a pivotal role. When the materials had Qn(n>2) as the primary bonding structure, steric hindrance by the chain frameworks affected the alkali dissolution process, resulting in gradual disintegration from the outer layers inward. For the materials dominated by Q1frameworks, OH-could penetrate the frameworks, leading to their rapid depolymerization and outward dissolution. Overall, the Si/Al bonding environment played a crucial role in alkaline dissolution, providing theoretical guidance for classifying the alkali-activation utilization of MSWIBA and other aluminosilicate solid wastes.

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英语词汇转义浅析

陶瓷研究与职业教育 2009年第4期7卷 53-54,57页

作者：吉绍锋王莹唐山学院河北唐山063000

以"一张一弛"和"否极泰来"两个词语为例,讨论英语词汇的语义转换问题。

关键词：英语词汇转义

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谈英语教师反思型教学

唐山师范学院学报 2006年第4期28卷 115-117页

作者：吉绍锋韩里路唐山学院外语系河北唐山063000

教师是影响教学改革的关键因素之一。英语教师不能仅凭所学的语言知识和基本教学技能从事教学,必须在具体的教学环境中不断地进行反思,才能把理论和实践有效地结合起来,成为问题的解决者和决策的制定者,并且借此可加强教师职业的专业化... 详细信息

教师是影响教学改革的关键因素之一。英语教师不能仅凭所学的语言知识和基本教学技能从事教学,必须在具体的教学环境中不断地进行反思,才能把理论和实践有效地结合起来,成为问题的解决者和决策的制定者,并且借此可加强教师职业的专业化,进一步提高专业技能。

关键词：反思教师教育活动反思型教学实践专业化