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盐酸胍

盐酸胍的相关文献在1990年到2022年内共计145篇,主要集中在化学、生物化学、化学工业 等领域,其中期刊论文79篇、会议论文5篇、专利文献19102篇;相关期刊51种,包括生物化学与生物物理学报:英文版、生物物理学报、中国医学物理学杂志等; 相关会议5种,包括2013年海峡两岸平坦化技术研讨会、第十三届全国有机分子电化学与工业学术会议、第13届离子色谱学术报告会等;盐酸胍的相关文献由319位作者贡献,包括孙鹤、孙华林、曹继虎等。

盐酸胍—发文量

期刊论文>

论文:79 占比:0.41%

会议论文>

论文:5 占比:0.03%

专利文献>

论文:19102 占比:99.56%

总计:19186篇

盐酸胍—发文趋势图

盐酸胍

-研究学者

  • 孙鹤
  • 孙华林
  • 曹继虎
  • 董晓燕
  • 周鹏
  • 孙彦
  • 李向荣
  • 边六交
  • 马彦珍
  • 耿芳宋
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 杨光; 王睿聪; 杨波; 李琴; 袁少飞
    • 摘要: 以盐酸胍改性大豆蛋白制得大豆蛋白胶,并加入一定量的石墨烯进行辅助改性,采用SEM,DSC,FTIR等表征手段研究了石墨烯对改性大豆蛋白胶外观结构、固化温度、蛋白质相对分子质量及官能团的影响.实验结果表明,石墨烯的最佳加入量为0.04 mg/mL,此时改性大豆蛋白胶的干状剪切强度为1.577 MPa,湿状剪切强度为0.746 MPa.与未加入石墨烯的改性大豆蛋白胶相比,加入石墨烯的改性大豆蛋白胶的结构更加疏松多孔,但固化温度、蛋白质相对分子质量分布及官能团没有明显变化.
    • 杜义琛; 周建伟; 王辰伟; 何彦刚; 张文倩; 季军
    • 摘要: 根据Zeta电势测量、极化曲线测量和原子力显微镜观察的结果,探讨了盐酸胍(GH)在Ru化学机械抛光(CMP)过程中的作用.结果表明:在pH=9的5% SiO2+ 0.15% H2O2抛光液中,GH的添加可以大幅度提高钌的去除速率.当GH浓度为80 mmol/L时,钌的去除速率最佳.在相同浓度下,GH对Ru去除速率的提高效果优于KC1,皆因GH除了可以提升SiO2颗粒对Ru表面的机械作用之外,还能加速Ru腐蚀.%The effect of guanidine hydrochloride (GH) on chemical mechanical polishing (CMP) of Ru was studied based on the results of Zeta potential measurement,polarization curve measurement and atomic force microscopic observation.The results showed that the removal rate of Ru in 5% SiO2 + 0.15% H2O2 polishing slurry at pH 9 is greatly improved by the addition of GH and optimal when the concentration of GH is 80 mmol/L.With the same concentration,the improvement of Ru removal rate by GH is better than that by KC1,due to the fact that GH not only enhances the mechanical action of SiO2 particles on Ru surface,but also accelerates the corrosion of Ru.
    • 胡升; 黄俊; 柯丕余; 赵伟睿; 吕常江; 王进波; 尚龙安; 梅乐和
    • 摘要: 利用荧光光谱法研究了盐酸胍和脲诱导的谷氨酸脱羧酶野生酶和突变酶K413A的去折叠过程,以探索与酶稳定性相关的构效关系.以盐酸胍为变性剂时,野生型酶和突变酶K413A在激发波长为280 nm的荧光图谱中色氨酸的最大发射峰均发生红移,色氨酸荧光强度呈现先上升再下降的趋势;以脲为变性剂时,两种酶荧光图谱中色氨酸的最大发射峰同样发生红移,但色氨酸荧光强度持续下降.无论是以盐酸胍还是以脲作为变性剂时,野生型酶和突变酶K413A的去折叠过程都符合“三态模型”,说明随着变性剂浓度的增加,野生型酶和突变酶K413A先从天然态转变为部分折叠中间态,并最终转变为去折叠状态.此外,考察了变性剂对谷氨酸脱羧酶活力的影响,当以盐酸胍为变性剂时,野生型酶和突变酶K413A半失活的盐酸胍浓度分别为0.4 mol·L-1和0.7 mol·L-1,而半失活的脲浓度分别为1 mol·L-1和2 mol·L-1.研究表明,突变酶K413A的热力学稳定性比野生型酶更强,K413位点与GAD的结构刚性有重要联系.
    • 步红红; 焦燕妮; 兰文军; 庄晓丽; 戴肖南; 李天铎
    • 摘要: 采用胃蛋白酶降解法从猪皮中提取了胶原蛋白,用十二烷基硫酸钠-聚丙烯酰胺凝胶电泳( SDS-PAGE)确定为Ⅰ型胶原;红外及紫外光谱表明胶原分子中存在三螺旋结构.分别采用小幅振荡剪切法、恒定剪切速率法及滞后环法研究了盐酸胍浓度及作用时间对Ⅰ型胶原蛋白体系流变性的影响.研究表明,随盐酸胍浓度的增大及作用时间的延长,盐酸胍/胶原分散体系由假塑性流体逐渐接近于牛顿流体.在所研究的盐酸胍浓度范围(0~6.0 mol/L)内,盐酸胍/胶原分散体系的触变性类型随盐酸胍浓度的增大发生正触变性-复合触变性-负触变性的转变;随盐酸胍作用时间的延长(6~48 h),盐酸胍浓度为1.0 mol/L的胶原分散体系的触变性类型发生复合触变性-负触变性的转变.本文的研究结果有助于加深对触变性产生机理的认识.%Collagen was extracted from the outer skin of pig using a pepsin digestion method. The isolated collagen was characterized by sodium dodecyl sulfate-polyacrylamide gel electrophoresis( SDS-PAGE) , Fourier transform infrared spectroscopy(FTIR) and ultraviolet(UV). According to the electrophoretic pattern, the isolated collagen consisted of two different α-chains(α1 , α2 ) and one β-chain, indicating type Ⅰ collagen. FTIR and UV results confirmed the presence of triple helical structure in the collagen molecule. The rheologi-cal properties of GuHCl/typeⅠcollagen dispersions were investigated as a function of guanidine hydrochloride ( GuHCl) concentration and action time. The results of flow curves indicated that the pseudoplastic flow behavior of GuHCl/collagen dispersions gradually close to the Newtonian fluid with the increase of GuHCl concentration in the range of 0—6. 0 mol/L and action time in the range of 6—48 h. The linear oscillatory shear, steady shear and thixotropic loop experiments were performed to investigate thixotropic behavior of the GuHCl/collagen dispersions. It was found that the thixotropic type of GuHCl/collagen dispersions transformed from positive thixotropy to complex thixotropy and then to negative thixotropy with the increase of GuHCl concentration. The thixotropic type of collagen dispersion transformed from complex thixotropy to negative thixotropy with the increase of action time of 1. 0 mol/L GuHCl. It should be note that the complex thixotropy in GuHCl/collagen dispersions has not been reported in the similar systems so far. And we tentatively dis-cussed this novel discovery on the basis of the interactions between GuHCl molecule and collagen. Meanwhile, this work would be helpful to deeply understand the mechanism of thixotropy.
    • 文科; 杜林方
    • 摘要: 诱导表达GST-PR-1a蛋白,利用蛋白质内源荧光和外源ANS荧光为探针,对分离的重组表达蛋白进行热稳定性、盐酸胍、尿素研究.50~80°C处理时,PR-1a内源荧光和外源荧光几乎无变化,90°C时荧光强度均有明显降低.盐酸胍、尿素处理后,随着浓度的增加,最大吸收波长红移,说明PR-1a中色氨酸残基主要存在于分子内部,且易受温度等因素影响从而导致三维结构的变化.特定浓度的盐酸胍处理后,蛋白呈现中间态.
    • 赵奇; 张浩; 刘俊宁; 王晓平
    • 摘要: Objective To investigate the effectiveness of urea and guanidine hydrochloride on sperm fragmentation.Methods Eighty patients with oligoasthenoteratozoospermia were randomly divided into two groups according to the random number table, with 40 cases in each group.Patient′s sperms were collected to extract sperm cells.Urea alone and guanidine hydrochloride plus urea pyrolysis were applied to sperm fragmentation,respectively.Results The protein concentration and protein spot in the urea and guanidine hydrochloride group were significantly higher than those in the urea group(( 1.25 ±0.13)μg/μl vs.(0.74 ±0.15)μg/μl,(864 ±52) vs.(718 ±63), P<0.05).Conclusion The fragmentation with urea and guanidine hydrochloride achieves richer and more comprehensive sperm protein species,a higher protein content, and more perfect two-dimensional gel electrophoresis profiles, which might be conducive to finding the differential proteins.%目的:探讨尿素加盐酸胍裂解精子的有效性。方法将80例少弱畸精子症患者按随机数字表法分成两组,每组40例,采集精液标本提取精子,分别应用尿素加盐酸胍裂解法或尿素裂解法对精子进行裂解。结果尿素加盐酸胍组得到蛋白质浓度、蛋白质点分别为(1.25±0.13)μg/μl、(864±52)个,均明显高于尿素组的(0.74±0.15)μg/μl、(718±63)个(P<0.05)。结论尿素加盐酸胍裂解法能得到更丰富、更全面的精子蛋白质种类,并提高蛋白质含量,使双向电泳图谱更加完善,更有利于寻找差异蛋白质。
    • 林新兴; 刘凯; 陈礼辉; 黄六莲; 曹石林
    • 摘要: 利用离子交联法制备壳聚糖-盐酸胍纳米徼球,并通过红外光谱(FTIR)与热失重(TG)对微球的化学结构、热稳定性进行检测.结果表明:壳聚糖与盐酸胍复合后壳聚糖的酰胺键发生位移,其强度也有所增加,两者之间并未产生新的化学键,而是以物理交联的方式相结合.通过Zeta电位的测定及吸附动力学的研究可知,纳米微球的Zeta电位为+23.6 mV,竹浆纤维的Zeta电位达到-203.4.mV;该纳米微球可通过静电和氢键作用吸附在竹浆纤维上,其吸附平衡时间仅为8min.添加该纳米微球的抗菌纸对大肠杆菌和金黄色葡萄球菌都具有较好的抑制作用.
    • 杨媛; 余永杰; 陈银; 邹纯莹
    • 摘要: 合成了苯三甲酸和盐酸胍共同构建主体晶格的正四丁基铵阳离子管状包合物(C4H9)4N+·2C(NH2)3+·1,3,5-C6 H3(COO-)3·3H2O,并通过单晶X射线衍射法对其进行了晶体结构测定.结果表明:包合物中苯三甲酸阴离子和盐酸胍阳离子氢键连接形成的宽链借助水分子氢键连接在一起,形成沿bc平面无限延伸的二维氢键褶皱层,构成类长方形管道的一对管壁,另一盐酸胍阳离子穿插在氢键层中,构成管道的另一对管壁,每个管道内包含两列规则排列的正四丁基铵阳离子(n-C4H9)4N+.
    • 赵粼; 阙斐; 周晓红; 刘绿叶
    • 摘要: LC was applied to the simultaneous determinations of guanidine hydrochloride and chloridion in bio-buffer. The sample were separated on Acclaim Trinity PI column (3. 0 mm×100 mm, 3 μm) with the mobile phase containing, acetonitrile and 0. 020 mol·L-1 NH4OAc solution, mixed in the ratio of 30 to 70 (by volume) and adjusted to pH 5. 0 with acetic acid, and the contents of guanidine hydrochloride and chloridion were determined by charged aerosol detector with atomizing temperature of 25 "C and sampling frequency of 5 Hz. Linear relationships between peak area and mass concentration for guanidine hydrochloride and chloridion were obtained in the same range of 0. 20 -5. 00 g·L-1, and with their detection limits (3S/N) of 0. 005 and 0. 001 g·L-1 respectively. Values of average recovery found by standard addition method were 96. 0% for guanidine hydrochloride and 92. 5% for chloridion, with values of RSD's (n=7) less than 1. 0%.%提出了液相色谱法测定生物缓冲溶液中盐酸胍与氯离子含量.以Acclaim Trinity P1色谱柱(3.0 mm×100 mm,3μm)为分离柱,乙腈和0.020 mol·L-1乙酸铵溶液按30比70混合(用乙酸调节pH至5.0)为流动相进行淋洗,用电雾式检测器检测,雾化器温度25°C,采样频率5 Hz.盐酸胍和氯离子的峰面积与质量浓度均在0.20~5.00 g·L-1范围内呈线性关系,方法检出限(3S/N)分别为0.005,0.001 g· L-1.采用标准加入法做回收试验,盐酸胍和氯离子的平均回收率分别为96.0%和92.5%,相对标准偏差(n=7)均小于1.0%.
    • 冯瑄; 张潭; 边六交
    • 摘要: The refolding of denatured hen egg white lysozymes induced by guanidine hydrochloride and the distribution and transition of stable conformations of denatured hen egg white lysozymes during the refolding procedure were studied by sodium dodecyl sulfate polyacrylamide gel electrophoresis(SDS-PAGE) and native-PAGE, high-performance size-exclusion chromatography, intrinsic fluorescence emission spectra and fluorescence phase diagram, and biological activity assay. The results show that during the refolding procedure of denatured hen egg white lysozymes induced by guanidine hydrochloride, two stable intermediates of hen egg white lysozymes separately existed at about 5. 0 and 2. 4 mol/L of guanidine hydrochloride in renaturation solution, and this refolding followed a four-state model. Based on the four-state model, an equation which described the renaturation rate of denatured protein molecules under different denaturant concentrations in renaturation solution was presented and through this equation two characteristic refolding parameters, the thermodynamic refolding equilibrium constant κ of the conformational transition of denatured protein molecules from their one conformational states to their another ones and the number m of denaturant molecules associated with an protein molecule during the conformational transitions, can be simultaneously derived. And further, by means of these two characteristic refolding parameters, the distribution and transition of stable conformations of egg white lysozyme molecules under different guanidine hydrochloride concentrations in denaturation solution can be well described.%采用变性和非变性电泳、高效凝胶排阻色谱、内源荧光发射光谱和荧光相图以及生物活性测定等方法,研究了盐酸胍诱导的变性卵清溶菌酶分子的重折叠过程及此过程中卵清溶菌酶分子各稳定构象态的分布和过渡.结果表明,当复性液中盐酸胍浓度分别约为5.0和2.4 mol/L时,变性卵清溶菌酶分子的重折叠过程各存在1个稳定折叠中间态,重折叠过程符合“四态模型”.在卵清溶菌酶分子四态重折叠过程基础上,结合盐酸胍与卵清溶菌酶分子之间的缔合-解离平衡,给出了一个定量描述变性剂诱导的蛋白质分子复性过程中蛋白质分子复性率随溶液中变性剂浓度变化的方程.该方程包含2个特征折叠参数,一个是蛋白质分子从一个稳定构象态过渡到另一个稳定构象态的热力学过渡平衡常数k;另一个是在此过程中平均每个蛋白质分子所结合的变性剂分子数目m.通过这2个特征折叠参数能够定量描述盐酸胍诱导的变性卵清溶菌酶完全去折叠态、折叠中间态和天然态分子随复性液中盐酸胍浓度变化的分布和过渡情况.
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