搜索结果: 1-15 共查到“理学 HD-5”相关记录56条 . 查询时间(0.101 秒)
探讨二维超声联合四维彩超超高细微分辨血流技术(HD-flow)彩色血流显像在产前诊断先天性心脏发育异常中的临床应用价值。方法 选取2016年7月至2018年2月在小榄人民医院行产前超声检查并分娩的单胎妊娠孕妇2 200例，先对所有入组的孕妇进行二维超声检查，二维超声检查提示胎儿疑似宫内心脏发育异常的孕妇再联合应用四维彩超HD-flow彩色血流显像进行检查。将进行二维超声的检查结果作为对照组，将二维...
茶树HD-Zip转录因子基因的克隆及其对非生物胁迫的响应分析
茶树 HD-Zip转录因子 基因克隆 非生物胁迫 表达分析
2018/12/11
茶树作为一种叶用植物, 具有重要的经济价值。非生物胁迫对茶树的生长发育过程和茶叶的生产影响很大。本研究采用RT-PCR方法从茶树‘龙井43’ cDNA中克隆获得1个编码HD-Zip转录因子的基因CsHB1。序列分析显示, CsHB1基因cDNA长为1 380 bp, 编码459个氨基酸, 含有典型的START结构域。进化分析显示, 茶树CsHB1属于HD-Zip家族转录因子的IV亚族。多序列对比发...
A novel Medicago truncatula HD-Zip gene, MtHB2, is involved in abiotic stress responses
MtHB2 Abiotic stress Medicago truncatula Arabidopsis thaliana Pro Solublesugars Oxidative damage
2015/2/5
The HD-Zip proteins are important transcription factors participating in numerous physiological processes in plants. In this study, we identified a homeobox-leucine zipper gene from Medicago truncatul...
多粘类芽孢杆菌HD-1产纤维素酶的条件优化
多粘类芽孢杆菌HD- 纤维素酶 发酵条件 优化
2016/7/25
采用DNS比色法,通过单因素实验和正交实验对多粘类芽孢杆菌HD-1产纤维素酶的培养基主要成分和培养条件进行优化。结果表明:该菌种产纤维素酶的最适培养基为麸皮0.5%、酵母膏1.25%、磷酸二氢钾0.04%、硫酸镁0.1%,培养基初始p H8.0;最适培养条件为接种量4%,培养温度35℃,培养时间51h。在此优化条件下,多粘类芽孢杆菌产纤维素酶活性可达88.3U/m L。
近日，中科院大连化学物理研究所分子反应动力学研究工作获得突破性进展。由分子反应动力学国家重点室肖春雷、孙志刚、杨学明、张东辉等撰写的论文Dynamical Resonances Accessible Only by Reagent Vibrational Excitation in the F+HD →HF+D Reaction（《F+HD→HF+D反应中只能通过反应物振动激发探测的反应共振态》）...
误差为FCA过程的线性模型HD估计的渐近正态性
线性回归模型 函数系数自回归过程 HD估计 正态分布
2013/12/4
考虑线性回归模型y=xTβ+e, 其中误差e是函数系数自回归(FCA)过程.本文研究该模型未知参数的 Huber-Dutter估计的渐近性质,在合理的条件下,证明了这些估计量以n-1/2速度渐近于正态分布.
植物HD-Zip转录因子的生物学功能
HD-Zip转录因子 生物学功能 基因表达 蛋白互作 激素途径
2013/10/30
HD-Zip转录因子属于Homeobox蛋白家族, 是植物特异转录因子, 由高度保守的HD(Homeodomain)结构域和Leu zipper(Zip)元件组成, 前者与DNA特异结合, 后者介导蛋白二聚体的形成。HD-Zip转录因子家族包括4个亚家族(HD-Zip Ⅰ-Ⅳ), 其成员通过与其他蛋白互作、参与激素介导的信号途径, 从而调控植物生长发育、光形态建成、花发育、果实发育和植物对逆境应答...
Temperature-Pressure Profile of the hot Jupiter HD 189733b from HST Sodium Observations: Detection of Upper Atmospheric Heating
spectroscopic planetary systems individual HD 189733b
2012/2/23
We present transmission spectra of the hot Jupiter HD 189733b taken with the Space Telescope Imaging Spectrograph aboard HST. The spectra cover the wavelength range 5808-6380 Ang with a resolving powe...
KC-Trockenperlen HD防水、耐用的干燥剂
KC-Trockenperlen HD 防水 耐用 干燥剂
2011/10/20
巴斯夫KC-Trockenperlen HD是一种防水、耐用的干燥剂，主要用于压缩空气的无热干燥机专利产品巴斯夫KC-Trockenperlen系列的高效吸附剂，其主要成分是硅铝酸盐凝胶，以坚硬、球形珠子的形式存在，具有很高的抗压碎能力和低磨损率。KC-Trockenperlen吸附剂与其它的吸附剂相比，具有较长的使用寿命，并且在大多数应用中，可以减少生产成本。
High Resolution Crossed Molecular Beams Study on the F+HD→DF+H Reaction at Collision Energy of 8.19-18.98 kJ/mol
F+HD→DF+H Crossed molecular beam Rydberg tagging
2012/4/5
The crossed beams scattering dynamics of the F+HD→DF+H reaction have been studied at collision energies ranging from 8.19 kJ/mol to 18.98 kJ/mol using the high resolution H-atom Rydberg tagging time-o...
Assignment of resonances in dissociative recombination of HD+ ions: high-resolution measurements compared with accurate computations
Assignment of resonances dissociative recombination high-resolution measurements accurate computations
2011/8/11
Abstract: The collision-energy resolved rate coefficient for dissociative recombination of HD+ ions in the vibrational ground state is measured using the photocathode electron target at the heavy-ion ...
High Resolution Crossed Molecular Beams Study on the F+HD→HF+D Reaction at Collision Energy of 5.43?18.73 kJ/mol
F+HD→HF+D Crossed molecular beam Rydberg tagging Reactive reso-nance
2012/4/5
The dynamics of F+HD→HF+D reaction has been studied at ten collision energies rang-ing from 5.43 kJ/mol to 18.73 kJ/mol using high-resolution H/D atom Rydberg tagging time-of-flight method. Product vi...
Resolving the CO Snow Line in the Disk around HD 163296
Resolving CO Snow Line Disk around HD 163296
2011/10/21
We report Submillimeter Array (SMA) observations of CO (J=2--1, 3--2 and 6--5) and its isotopologues (13CO J=2--1, C18O J=2--1 and C17O J=3--2) in the disk around the Herbig Ae star HD 163296 at ~2" (...
CNO and F abundances in the barium star HD 123396
stars: individual (HD123396: HIP 69834) – stars: abundances – stars: atmospheres – stars: barium
2011/10/10
Barium stars are moderately rare, chemically peculiar objects, which are believed to be the result of the pollution of an otherwise normal star by material from an evolved companion on the asymptotic ...
Resolved Submillimeter Observations of the HR 8799 and HD 107146 Debris Disks
Resolved Submillimeter HR 8799 HD 107146 Debris Disks
2011/10/10
We present 880 um Submillimeter Array observations of the debris disks around the young solar analogue HD 107146 and the multiple-planet host star HR 8799, at an angular resolution of 3" and 6", respe...