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Evolution of microstructure,mechanical and magnetic properties of electrodeposited 50% Ni-Fe alloy foil after thermal treatment

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Journal of Iron and Steel Research International 2017年第8期24卷 844-851页

作者： Hong-ru Ren Jin-tao Gao Zhe Wang Chong Li Fu-qiang Wang zhan-cheng Guo State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

In order to expand the application of the electrodeposited Ni-Fe alloy foil,their mechanical and magnetic properties were studied after heat *** development of grain growth during annealing was in-situ online investigated using a heating stage microscope,and the texture was analyzed via X-ray diffraction（XRD）and electron back-scattered diffraction（EBSD）.The results indicated that abnormal grain growth usually occurred during annealing at 1000-1050°***{111}oriented grains preferentially grew as the annealing temperature and holding time *** plasticities of the electrodeposited Ni-Fe alloy foils after heat treatment were better than those of the original *** excellent ductility was obtained without a loss in magnetic properties after annealing at 1100°C for 6h.

关键词： Electrodeposited Ni-Fe alloy foil Mechanical property Magnetic property Annealing

重组大肠杆菌产耐热α-L-鼠李糖苷酶高密度发酵条件的优化

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安徽化工 2024年第1期50卷 69-74页

作者：葛林刘英英周芳名展凌玲苏州健雄职业技术学院生物医药学院江苏太仓215411

为了减少乙酸的生成,提高重组大肠杆菌生产耐热α-L-鼠李糖苷酶的产量,考查了指数流加培养、两阶段指数流加培养、诱导温度、诱导pH对重组大肠杆菌发酵生产耐热α-L-鼠李糖苷酶(TstRhaA)过程中乙酸含量和酶产量的影响。确定最佳发酵工艺... 详细信息

为了减少乙酸的生成,提高重组大肠杆菌生产耐热α-L-鼠李糖苷酶的产量,考查了指数流加培养、两阶段指数流加培养、诱导温度、诱导pH对重组大肠杆菌发酵生产耐热α-L-鼠李糖苷酶(TstRhaA)过程中乙酸含量和酶产量的影响。确定最佳发酵工艺:诱导前比生长速率0.2 h^(-1),诱导后比生长速率0.18 h^(-1),诱导温度33℃,pH 7.2。在最佳发酵工艺条件下,乙酸浓度始终保持在0.8 g/L以下,菌体干重(DCW)最大为69.6 g/L,最高酶活力为589.0 U/mL,是摇瓶发酵的23.4倍,实现了重组大肠杆菌高密度发酵生产TstRhaA。研究结果表明,调节大肠杆菌高密度发酵过程中乙酸含量在合适范围内,能够实现TstRhaA的高效生产,这对其他酶的高密度表达具有重要指导意义。

关键词： α-L-鼠李糖苷酶大肠杆菌乙酸高密度发酵

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一个用于黄单胞菌核开关筛选鉴定的GUS报告载体的构建

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基因组学与应用生物学 2024年第1期43卷 117-128页

作者：张云帆王家孟詹紫璐陈泳伶杨汇瀛唐东阶广西大学生命科学与技术学院南宁530005 亚热带农业生物资源保护利用国家重点实验室南宁530005

核开关(riboswitch)是存在于信使RNA(messenger RNA,mRNA)分子的5′非翻译区(5′-untranslated region,5′UTR)的一段具有调控功能的RNA片段,它通过与特定的代谢物分子直接结合来调控所在mRNA自身的表达。核开关广泛存在于细菌中,在调... 详细信息

核开关(riboswitch)是存在于信使RNA(messenger RNA,mRNA)分子的5′非翻译区(5′-untranslated region,5′UTR)的一段具有调控功能的RNA片段,它通过与特定的代谢物分子直接结合来调控所在mRNA自身的表达。核开关广泛存在于细菌中,在调控细菌的基础代谢以及致病等生理过程中发挥非常重要的作用。尽管目前在大肠杆菌(Escherichia coli)等模式细菌中已经鉴定了许多核开关,然而,至今在重要的植物病原细菌黄单胞菌属(Xanthomonas)细菌中只鉴定了1个核开关。为了实现在全基因组水平上对黄单胞菌的核开关进行高通量筛选鉴定,本研究设计和构建了1个β-葡萄糖苷酸酶(β-glucuronidase,GUS)报告载体pL3-SD^(+)gusA。该载体既适用于在黄单胞菌属细菌中对候选的核开关进行验证,也可以通过构建基因组DNA表达文库而实现对黄单胞菌核开关的高通量筛选鉴定。

关键词：黄单胞菌 GUS报告载体核开关高通量筛选鉴定

Improvement of β-phase crystal formation in a BaTiO3-modified PVDF membrane

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Plasma Science and Technology 2018年第6期20卷 144-151页

作者： Lin SHEN Lei GONG Shuhua CHEN Shiping zhan Cheng zhanG Tao SHAO Department of Environment and Chemical Engineering Dalian University Dalian 116622 People's Republic of China Liaoning Engineering Laboratory for Special Optical Functional Crystals Dalian University Dalian 116622 People' s Republic of China Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 People's Republic of China University of Chinese Academy of Sciences Beijing 100039 People's Republic of China

In this paper,low temperature plasma is used to modify the surface of barium titanate（BaTiO3）nanoparticles in order to enhance the interfacial compatibility between ferroelectric poly（vinylidene fluoride）（PVDF） and BaTiO3 *** results demonstrate that oxygenic groups are successfully attached to the BaTiO3 surface,and the quantity of the functional groups increases with the treatment ***,the effect of modified BaTiO3 nanoparticles on the morphology and crystal structure of the PVDF/BaTiO3 membrane is *** results reveal that the dispersion of BaTiO3 nanoparticles in the PVDF matrix was greatly improved due to the modification of the BaTiO3 nanoparticles by air *** is worth noting that the formation of a β-phase in a PVDF/modified BaTiO3 membrane is observably promoted,which results from the strong interaction between PVDF chains and oxygenic groups fixed on the BaTiO3 surface and the better dispersion of BaTiO3 nanoparticles in the PVDF ***,the PVDF/modified BaTiO3 membrane at the treatment voltage of 24 k V exhibits a lower water contact angle（≈68.4°） compared with the unmodified one（≈86.7°）.Meanwhile,the dielectric constant of PVDF/BaTiO3 nanocomposites increases with the increase of working voltage.

关键词： PVDF BaTiO3 nanocomposite non-thermal plasma β-phase ferroelectric

Remarks on the Three-dimensional Lattice Model

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Chinese Physics Letters 1996年第6期13卷 412-415页

作者： HU zhan-ning Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100080

We find the connection between the weight functions of the three-dimensional(3D)Bazhanov-Baxter model and the 3D vertex model proposed by Mangazeev et *** the weight function of the 3D integrable model with the modifi... 详细信息

关键词： form. vertex integrable

初诊超高龄多发性骨髓瘤患者硼替佐米基础方案治疗的生存预后分析

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中国全科医学 2024年第8期27卷 971-977页

作者：赵凤仪李新詹晓凯张佳佳申曼汤然范斯斌黄仲夏首都医科大学附属北京朝阳医院血液与肿瘤科北京市100020

背景多发性骨髓瘤(MM)是一种高度异质性疾病,超高龄老年MM患者是一类特殊群体,其治疗决策和一般评价缺乏一定的循证医学依据,在衰弱评估方面也有一定争议。目的分析以硼替佐米为基础方案治疗初诊超高龄MM患者的一般临床特征和生存预后... 详细信息

背景多发性骨髓瘤(MM)是一种高度异质性疾病,超高龄老年MM患者是一类特殊群体,其治疗决策和一般评价缺乏一定的循证医学依据,在衰弱评估方面也有一定争议。目的分析以硼替佐米为基础方案治疗初诊超高龄MM患者的一般临床特征和生存预后的影响因素,同时评价超高龄MM患者一般状况的最佳评估模式。方法回顾性分析2013年11月—2023年1月于首都医科大学附属北京朝阳医院石景山院区收治的29例初诊超高龄MM患者病例资料,通过首都医科大学附属北京朝阳医院病案系统进行生存随访,随访截至2023-04-01,本研究结局终点为总生存期(OS)和无进展生存期(PFS)。根据治疗方案将患者分为两药治疗组(n=18)和三药治疗组(n=11),比较两组患者临床和遗传学特征。采用老年评分系统(GA)评分、英国骨髓瘤研究联盟风险状况(MRP)评分和梅奥(Mayo)评分评估患者的衰弱状态,并进行疗效评价。采用Kaplan-Meier法绘制MM患者OS和PFS的生存曲线,不同影响因素的生存曲线比较采用Log-rank检验,采用多因素Cox比例风险回归分析探讨MM患者OS和PFS的影响因素。结果随访中位PFS为8.70(1.90~43.87)个月,中位OS为17.23(2.00~72.83)个月。至末次随访,共21例(72.41%)患者出现疾病进展(PD)或复发,12例(41.38%)患者死亡;一线治疗客观缓解率(ORR)为82.76%(24/29),部分缓解(PR)率为51.72%(15/29),非常好的部分缓解(VGPR)率为24.14%(7/29),完全缓解(CR)率为6.90%(2/29)。两组初诊超高龄MM患者CR率、VGPR率、PR率、ORR比较,差异均无统计学意义(P>0.05)。多因素Cox比例风险回归分析结果显示,MRP衰弱(HR=0.213,95%CI=0.049~0.924,P=0.039)、血清校正钙升高(HR=0.153,95%CI=0.041~0.570,P=0.005)和维持治疗(HR=4.301,95%CI=1.219~15.169,P=0.023)是初诊超高龄MM患者PFS的独立影响因素;维持治疗(HR=4.372,95%CI=1.049~18.221,P=0.043)是初诊超高龄MM患者OS的独立影响因素。结论含硼替佐米两药或三药治疗方案对初诊超高龄MM疗效和预后影响无明显差异,血清校正钙升高和维持治疗是影响生存的独立预后因素;MRP评分可用于评估初诊超高龄MM患者预后。

关键词：多发性骨髓瘤硼替佐米预后衰弱老年人,80以上总生存期无进展生存期

Investigation of the effects of humic acid and H_(2)O_(2) on the photocatalytic degradation of atrazine assisted by microwave

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Frontiers of Environmental Science & Engineering 2010年第3期4卷 321-328页

作者： Chao QIN Shaogui YANG Cheng SUN Manjun zhan Rongjun WANG Huanxing CAI Jia ZHOU State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210093China Nanjing Research Institude of Environmental Protection Nanjing 210013China Changzhou Environmental Monitoring Center Changzhou 210093China

A solution of atrazine in a TiO_(2)suspension,an endocrine disruptor in natural water,was tentatively treated by microwave-assisted photocatalytic *** effects of mannitol,oxygen,humic acid,and hydrogen dioxide on the photodegradation rate were *** results could be deduced as follows:the photocatalytic degradation of atrazine fits the pseudo-first-order kinetic well with k=0.0328 s–1,and·OH was identified as the dominant *** of atrazine was hindered in the presence of humic acid,and the retardation effect increased as the concentration of humic acid increased.H_(2)O_(2)displayed a significant negative influence on atrazine photocatalysis *** on intermediates identified with gas chromatography-mass spectrometry(GC-MS)and Liquid chromatography-mass spectrometry(LC-MS/MS)techniques,the main degradation routes of atrazine are proposed.

关键词： atrazine retardation effect photocatalysis TiO_(2)

On solitary wave in nonuniform shear currents

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Journal of Hydrodynamics 2020年第4期32卷 800-805页

作者： zhan Wang Bin-bin Zhao Wen-yang Duan R.Cengiz Ertekin Masoud Hayatdavoodi Tian-yu zhang College of Shipbuilding Engineering Harbin Engineering UniversityHarbin 150001China Department of Ocean and Resources Engineering University of HawaiiHonoluluUSA Civil Engineering Department School of Science and EngineeringUniversity of DundeeDundeeUK

In this paper,steady solutions of solitary waves in the presence of nonuniform shear currents are obtained by use of the high-level Green-Naghdi(HLGN)*** focus on large-amplitude solitary waves in strong opposing shear *** linear-type currents,quadratic-type currents and cubic-type currents are *** particular,the wave speed,wave profile,velocity field,particle trajectories and vorticity distribution are *** is demonstrated that presence of the nonuniform shear current modifies the velocity field and vorticity field of the solitary wave.

关键词： Solitary wave nonuniform shear current velocity field particle trajectories vorticity field

Study on the Relationship Between Sex Differentiation and Ethylene in Ramie

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Agricultural Sciences in China 2009年第4期8卷 418-423页

作者： XING Hu-cheng SHE Wei LUO Zhong-qin QIN zhan-jun JIE Yu-cheng Ramie Research Institute Hunan Agricultural University Changsha 410128 P.R.China Institute of Bast Fiber Crops Chinese Academy of Agricultural Sciences Changsha 410205 P.R. China

To explore the role of ethylene in sexual determination in ramie, the ethylene release rates in ramie stem apex of different sex, bud of the same node in female and hermaphrodite ramie in the second crop, and single inflorescence of different sex in hermaphrodite ramie were measured by gas chromatography. Effects of two ethylene inhibitors on sex expression in ramie were investigated. The ethylene release rate of stem apex was higher in the second crop or female ramie than that in the third crop or hermaphrodite ramie during growth. Although ethylene release rates between lower nodes and higher nodes were little different, it was lower in the middle nodes in hermaphrodite ramie. The ethylene release rates were higher in the higher nodes of female ramie at the second crop. At the third crop, the ethylene release rates were higher in lower nodes, lower in middle nodes and then highest in higher nodes in female ramie. However, an opposite ethylene release pattern was observed in hermaphrodite ramie. The ethylene release rate was higher in female flower than male flower and mixed inflorescence in hermaphrodite ramie. The male flower could be distinctly induced by AVG （aminooethoxyvinylglycine）. The node of the first male flower, percentage of female flowers and ratio of female flowers to male in ramie were evidently depressed by AVG in contrast to water. The percentage of mixed male and female flowers was also increased and the percentage of female flower decreased by spraying AgNO3. There was a close relationship between sexual differentiation and ethylene release rate in ramie. The female ramie could be induced by high ethylene release rate. The female flower could be inhibited by AVG and AgNO3. AVG at a concentration of 300 mg L^-1 was most effective.

关键词： ramie [Boehmeria nivea (L.) Gaud] sex ethylene