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键合机引线框架夹持传送机构的设计与开发

机床与液压 2009年第4期37卷 24-26,18页

作者：袁清珂徐凤阳颜旭晖曾德东郑开经广东工业大学机电工程学院广东广州510090

在分析现有键合机引线框架传送机构的优缺点的基础上,根据整机设备的设计开发要求,利用伺服电机和气缸作为动力源的方式,研究开发了夹持传送机构,用于完成引线框架的夹持、松开、传送等动作,并成功地应用到整机设备开发中,满足了整机功... 详细信息

在分析现有键合机引线框架传送机构的优缺点的基础上,根据整机设备的设计开发要求,利用伺服电机和气缸作为动力源的方式,研究开发了夹持传送机构,用于完成引线框架的夹持、松开、传送等动作,并成功地应用到整机设备开发中,满足了整机功能和性能的要求,目前该设备已投入实际生产运行。

关键词：键合机引线框架夹持机构

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键合机真空吸料机构的设计与开发

机床与液压 2009年第5期37卷 19-21,45页

作者：袁清珂郑开经颜旭晖曾德东袁毅凯尧剑峰广东工业大学机电工程学院广东广州510006 佛山国星光电科技有限公司设备管理部广东佛山528500

在分析现有LED键合机拾取料片优缺点的基础上,从提高拾取料片自动化和稳定程度出发,利用真空吸取、多角度转动换料及传感器定位等方式,研究开发了一种新型真空吸料机构,实现了一次容纳充足料片、平稳吸取料片和全过程智能识别料片状态... 详细信息

在分析现有LED键合机拾取料片优缺点的基础上,从提高拾取料片自动化和稳定程度出发,利用真空吸取、多角度转动换料及传感器定位等方式,研究开发了一种新型真空吸料机构,实现了一次容纳充足料片、平稳吸取料片和全过程智能识别料片状态的功能,并成功地应用于整机设备开发之中,满足了整机功能和性能的要求。

关键词：键合机吸料机构真空吸取多角度转动换料传感器定位智能识别

Low-temperature dry reforming of methane tuned by chemical speciations of active sites on the SiO_(2) and γ-Al_(2)O_(3) supported Ni and Ni-Ce catalysts

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Chinese Journal of Chemical Engineering 2022年第8期35卷 76-90页

作者： Yimin Zhang Ruiming zeng Yun Zu Linhua Zhu Yi Mei Yongming Luo dedong He Faculty of Chemical Engineering Kunming University of Science and TechnologyKunming 650500China National Engineering Laboratory for Flue Gas Pollutants Control Technology and Equipment Tsinghua UniversityBeijing 100084China Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China

The cognition of active sites in the Ni-based catalysts plays a vital role and remains a huge challenge in improving catalytic performance of low temperature CO_(2) dry reforming of methane(LTDRM).In this work,typical catalysts of SiO_(2) and γ-Al_(2)O_(3) supported Ni and Ni-Ce were designed and ***,the difference in the chemical speciations of active sites on the Ni-based catalysts is revealed by advanced characterizations and further estimates respective catalytic performance for *** show that larger[Ni0-]particles mixed with[Ni-O-Sin])species on the Ni/SiO_(2)(R)make CH_(4) excessive decomposition,leading to poor activity and *** the Ce species is doped,however,superior activity(59.0%CH_(4) and 59.8%CO_(2) conversions),stability and high H_(2)/CO ratio(0.96)at 600℃ can be achieved on the Ni-Ce/SiO_(2)(R),in comparison with other catalysts and even reported *** improved performance can be ascribed to the formation of integral([Ni0_(n))]-[CeⅢ-□-CeⅢ])species on the Ni-Ce/SiO_(2)(R)catalyst,containing highly dispersed[Ni]particles and rich oxygen vacancies,which can synergistically establish a new stable balance between gasification of carbon species and CO_(2) *** respect to Ni-Ce/γ-Al_(2)O_(3)(R),the Ni and Ce precursors are easily captured by extra-framework Al_(n)-OH groups and further form stable isolated([Ni0_(n))]-[Ni-O-Al_(n)])and[CeⅢ-O-Al_(n)]*** such a case,both of them preferentially accelerate CO_(2) adsorption and dissociation,causing more car-bon deposition due to the disproportionation of superfuous CO *** deep distinguishment of chemical speciations of active sites can guide us to further develop new efficient Ni-based catalysts for LTDRM in the future.

关键词： CO_(2)dry reforming of methane Low-temperature Ni-based catalysts Chemical speciations Reforming reaction mechanisms

Characterization and cloning of a brittle culm mutant (bc88) in rice (Oryza sativa L.)

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Chinese Science Bulletin 2013年第24期58卷 3000-3006,2914页

作者： RAO YuChun YANG YaoLong XIN dedong LI XiaoJing ZHAI KaiEn MA BoJun PAN JianWei QIAN Qian zeng DaLi College of Chemistry and Life Sciences Zhejiang Normal University State Key Laboratory of Rice Biology China National Rice Research Institute

This study characterizes a brittle culm (bc88) mutant of rice (Oryza sativa L.) obtained by ethylene methylsulfonate (EMS)-induced mutagenesis of Wuyunjing 7. The bc88 mutant exhibits a diversity of pleiotropic phenotypes, including brittle culm at the whole-plant growth stages, withered leaf tips at the seedling stage, and 18-d delay in heading date at the mature stage. Genetic analysis indicates that the bc88 mutant is controlled by a single recessive nuclear gene. The mutated bc88 gene isolated by map-based cloning contains only one point mutation in the 5th exon relative to its wild-type BC88 (LOC_Os09g25490 and Os09g0422500), leading to an amino acid change from P to L in bc88 plants. Alignment of the putative protein sequence with its homologs indicates that the mutation is located in the conserved region of the sequence. Detection of the transcription level of BC88 in rice plants shows that the expression level of BC88 is higher in spikes and culms than in leaves, roots, and leaf sheaths. These contribute to understanding of the molecular mechanism of cellulose synthesis. The target gene BC88 can be a useful tool in molecular marker-assisted selection for rice culm trait breeding.

关键词： rice (Oryza sativa L.) brittle culm Wuyunjing 7 clone mutation

Physiological Responses of Dendrobium officinale under Exposure to Cold Stress with Two Cultivars

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Phyton-International Journal of Experimental Botany 2020年第3期89卷 599-617页

作者： Shuaishuai Zhang Jin Li Yongchang Shen Linda Nartey Korkor Qian Pu Jin Lu Balock Shakeela dedong Kong Ou Li Guohong zeng Xiufang Hu Zhejiang Province Key Laboratory of Plant Secondary Metabolism and Regulation College of Life ScienceZhejiang Sci-Tech UniversityHangzhou310018China College of Agriculture and Biology Zhejiang UniversityDeqing Ecoagriculture Biotechnology Co.Ltd.Hangzhou310018China

This study aimed to explore the cold tolerance of two cultivars of Dendrobium officinale(MG1,MG2)grown in different regions of ***-2℃ incubation,cultivar MG1 remained active after 3 d,and continued to grow after returning to room ***,MG2 could only maintain its activity after 2 d treatment at−2℃,and the seedlings died with the low temperature treatment *** of the characteristics of the plants grown in the south(Hangzhou)or north(Zhengzhou)of China indicated that the leaves of MG1 also had reduced stomatal density,the highest thickness,and a compact *** contents of proline and soluble sugars were higher in MG1 than those in *** cultivar MG1 had higher SOD enzyme activity than MG2,while CAT and POD activities in samples from Zhengzhou were higher than those from *** contents of polysaccharides and alkaloids in stems of in MG1 were higher than those in MG2,while the content of flavonoids in the Zhengzhou samples was higher than that in the Hangzhou *** addition,plant heights,stem diameters,and chlorophyll content were higher in ***,MG1 had better cold resistance than ***1 is a cold tolerant cultivar with thick leaves and reduced stomatal density,higher contents of soluble sugars,proline,CAT,POD,polysaccharides,flavonoids and alkaloids,which together make it more adaptable to low ***,the cultivar MG1,with its demonstrated cold tolerance,can accordingly be grown on a large scale in cold regions,thereby expanding the available planting area for this important traditional medicinal plant to meet the increasing commercial demand for it.

关键词： Dendrobium officinale cold stress microstructure characteristics physiological characteristics biochemical characteristics

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新型建筑工业化发展中面临的困难和对策

建筑经济 2022年第7期43卷 11-17页

作者：李奇会王德东曾大林山东建筑大学管理工程学院山东济南250101

在我国新型建筑工业化进入关键发展阶段背景下,对新型建筑工业化发展过程中面临的问题进行分析,提出包括树立工业化产业化融合发展理念、更好发挥市场和政府的合作机制、突破行业发展共性技术、完善产业组织模式等对策建议,以期推进新... 详细信息

在我国新型建筑工业化进入关键发展阶段背景下,对新型建筑工业化发展过程中面临的问题进行分析,提出包括树立工业化产业化融合发展理念、更好发挥市场和政府的合作机制、突破行业发展共性技术、完善产业组织模式等对策建议,以期推进新型建筑工业化自主健康可持续发展。

关键词：新型建筑工业化困难对策

文化生态视阀下常州地区水族马尾绣的发展路径探究

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辽宁丝绸 2019年第3期 5-7页

作者：马德东曾红常州纺织服装职业技术学院

在民族文化融合的社会背景下,水族马尾绣这门优秀的民间技艺承载着重要的民族文化,并成为民族自信输出的重要标志。以文化生态学为契入点,分析水族马尾绣在常州地区的发展瓶颈,基于“共享经济”模式,探索研究“常贵”两地非物质文化资... 详细信息

在民族文化融合的社会背景下,水族马尾绣这门优秀的民间技艺承载着重要的民族文化,并成为民族自信输出的重要标志。以文化生态学为契入点,分析水族马尾绣在常州地区的发展瓶颈,基于“共享经济”模式,探索研究“常贵”两地非物质文化资源的共享思路与模式,构建合理的文化生态体系,实现马尾绣产业由“原生态”到“市场化”的转型升级。

关键词：水族马尾绣文化传承共享资源发展路径

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北乌头提取物对舞毒蛾体内酶活性的影响

华中农业大学学报 2020年第1期39卷 95-102页

作者：吴德东张国财杨璟曾建勇张国珍东北林业大学林学院

采用系统溶剂法对北乌头甲醇提取物进行分离,用饲料混药法测定4种萃取物对舞毒蛾的胃毒毒力,测定了北乌头乙酸乙酯萃取物对舞毒蛾幼虫体内解毒酶、保护酶、消化酶活力的影响。试验结果表明:北乌头乙酸乙酯萃取物杀虫作用显著,为主要杀... 详细信息

采用系统溶剂法对北乌头甲醇提取物进行分离,用饲料混药法测定4种萃取物对舞毒蛾的胃毒毒力,测定了北乌头乙酸乙酯萃取物对舞毒蛾幼虫体内解毒酶、保护酶、消化酶活力的影响。试验结果表明:北乌头乙酸乙酯萃取物杀虫作用显著,为主要杀虫活性物质;舞毒蛾幼虫经北乌头乙酸乙酯萃取物亚致死浓度(LC20)处理后,其体内羧酸酯酶、谷胱甘肽S-转移酶和乙酰胆碱酯酶活性均表现为持续抑制,处理72 h,乙酰胆碱酯酶活力为对照的50.6%,抑制作用极显著(P<0.01);超氧化物歧化酶、过氧化氢酶、过氧化物酶活性均表现为先激活后抑制,处理24 h,过氧化氢酶活力为对照的1.613倍,激活作用极显著(P<0.01),处理72 h,超氧化物歧化酶活力为对照的84.2%,抑制作用极显著(P<0.01);脂肪酶和淀粉酶活性均表现为持续抑制,处理72 h,脂肪酶活力为对照的53.9%,抑制作用极显著(P<0.01);蛋白酶活性表现为先激活后抑制,处理24 h,蛋白酶活力为对照的1.431倍,激活作用极显著(P<0.01),处理72 h,蛋白酶活力为对照的90.4%,抑制作用显著(P<0.05)。综上,北乌头乙酸乙酯萃取物可影响舞毒蛾幼虫的解毒酶、保护酶及消化酶,扰乱其正常生理代谢。

关键词：北乌头提取物舞毒蛾解毒酶保护酶消化酶酶活性植物源杀虫剂

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响应面优化烟草提取物微囊制备工艺

农药学学报 2020年第3期22卷 534-542页

作者：陈运泽张博文吴德东曾健勇杨璟张国财东北林业大学林学院哈尔滨150040 东北林业大学信息与计算机工程学院哈尔滨150040

烟草提取物具有良好的杀虫活性。为提高其稳定性,以烟草提取物为芯材,以明胶、阿拉伯胶为壁材,采用复凝聚法制备了烟草提取物微囊。以包埋率为评价指标,采用响应面法对微囊制备工艺进行优化。对微囊进行了表面形态观察、粒径测定、红外... 详细信息

烟草提取物具有良好的杀虫活性。为提高其稳定性,以烟草提取物为芯材,以明胶、阿拉伯胶为壁材,采用复凝聚法制备了烟草提取物微囊。以包埋率为评价指标,采用响应面法对微囊制备工艺进行优化。对微囊进行了表面形态观察、粒径测定、红外光谱分析、热稳定性分析及室内毒力测定。结果表明:当乳化剂质量分数4%、明胶质量分数2.05%、阿拉伯胶质量分数3%、壁芯质量比1.34:1.00以及复凝聚反应时间为36 min时,制备的微囊包埋率最高,理论包埋率为58.93%。经验证,在此条件下实际包埋率为58.42%±0.12%,接近理论值。所得微囊表面光滑,成囊性好,粒径分布在4.72~17.05μm之间,中位径8.63μm;在877.55和2922.13 cm^−1处保留了烟草提取物的红外特征峰;微囊化能够提高烟草提取物的热稳定性;室内毒力测定结果表明,烟草提取物微囊的LC50值为20.19 mg/mL,与烟草提取物的毒力水平相当,说明微囊化没有降低烟草提取物的毒力。本研究可以为烟草提取物微囊制备提供参考。

关键词：响应面法烟草提取物微囊制备复凝聚法烟草提取物稳定性