mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
递减式曝气在惠州金山污水处理厂中的应用及探讨

介绍了递减式曝气系统在金山污水处理厂中的应用,着重介绍曝气系统的设计及控制,并对污水处理厂中能耗最大的曝气供氧系统进行节能探讨.在优化设计的情况下,递减式曝气能够以更少的能耗完成相同处理效果的设计要求,可以降低成本,更有利于系统的控制
青岛市娄山河污水处理厂升级改造工程设计

青岛娄山河污水处理厂原采用A2/O工艺,执行<<城镇污水处理厂污染物排放标准>>(GB18918--2002)二级标准,为使出水水质提标至一级A标准,需对污水处理厂进行升级改造.在充分利用原有处理设施的基础上,采用优化型厌氧+多段缺氧-好氧工艺对原有设施进行改造,并增加深度处理构筑物.介绍了改造工程的处理工艺,改造情况及设计参数,并对改造过程中需要考虑的问题进行分析
青蒿素治疗大鼠子宫内膜异位症的疗效

目的探讨青蒿素对大鼠子宫内膜异位症模型的异位内膜是否具有抑制作用,以及其抑制作用与细胞凋亡和血管生成表达之间的关系.方法构造大鼠内膜异位症模型,将建模成功的40只大鼠分为4组,分别为:青蒿素高剂量组[300 mg/(kg.d)],青蒿素低剂量组[150 mg/(kg.d)],丹那唑组[160 mg/(kg.d)]和安慰剂组.均用药4周后处死大鼠,比较其各组病灶体积及组织学的变化,用免疫组织化学(SP法)对样本进行染色,比较各组样本的细胞凋亡指数(AI),Bcl-2,微血管密度(MVD)的表达.结果与安慰剂组比较,青蒿素高剂量组,青蒿素低剂量组和丹那唑组异位内膜的体积显著减少,安慰剂组异位内膜体积在给药后较给药前稍增大,用药组囊泡体积与同期安慰剂组比较差异有显著性(P<0.05).与安慰剂组比较,3个治疗组异位内膜组织的AI显著增高, Bc l-2和MVD的表达显著降低,但3个治疗组中MVD的表达差异无统计学意义.各组大鼠未见明显的不良反应.结论青蒿素对大鼠子宫内膜异位症模型中异位内膜的发生及发展有抑制作用,并且其抑制效应可能与促进细胞的凋亡和抑制血管生成有关,且安全性较高
血清半乳凝素-3浓度在甲状腺乳头状癌诊断中的应用

目的探讨血清半乳凝素-3浓度对甲状腺乳头状癌的诊断价值.方法采用酶联免疫吸附法(ELISA)检测血清半乳凝素-3浓度,免疫组织化学En Vision二步法检测甲状腺手术标本中半乳凝素-3的表达情况.结果血清半乳凝素-3浓度(ng/mL)与甲状腺组织半乳凝素-3表达相关,在甲状腺乳头状癌血清半乳凝素(10.01±5.89)中显著高于甲状腺良性结节(结节性甲状腺肿8.17±3.27,腺瘤7.41±3.30,桥本甲状腺炎6.69±1.66)及正常对照(4.97±0.46)(P<0.05).结论检测血清半乳凝素-3浓度有望成为诊断甲状腺乳头状癌的辅助项目
射频消融治疗250例房室结折返性心动过速

目的探讨射频消融治疗房室结折返性心动过速(AVNRT)疗效,安全性及不同消融靶点的分布.方法 250例AVNRT的入选患者,行常规心内电生理检查(EPS),冠状静脉窦造影及Koch三角的测量,结合腔内电图寻找最佳消融靶点,采用温度控制方式射频消融治疗.结果本组手术成功率为98.5%,复发率1.5%,并发症发生率0.78%.结论射频消融治疗房室结折返性心动过速是有效,安全的,成功率高,并发症少,复发率低;术中行冠状静脉窦造影及Koch三角的测量有利于减少并发症的发生;结合腔内电图有效的消融靶点主要分布于H IS至CSO连线的中下1/3段区,中位法消融成功率高
缺氧缺血性脑损伤新生大鼠海马CA1区NF-κB激活与神经元凋亡的关系

目的探讨新生大鼠脑缺氧缺血后海马CA1区核因子-κB(NF-κB)激活的动态变化及其与海马CA1区神经元凋亡的关系.方法 64只7日龄SD大鼠随机分为假手术组,缺氧缺血性脑损伤组,每组32只,各组又均按时间点分为1,6,12,24 h 4个亚组,每个亚组8只.经分离,结扎左颈总动脉和8%低氧暴露制备缺氧缺血性脑损伤模型.采用免疫组织化学检测左侧海马CA1区NF-κB P65核阳性表达以评价NF-κB活化情况和TUNEL法检测神经细胞凋亡情况.结果缺氧缺血性脑损伤组各时间点海马CA1区NF-κB P65核阳性表达增强和神经细胞凋亡增多,与假手术组相应时间点比较差异有统计学意义(P<0.001);直线相关分析表明大鼠缺氧缺血后凋亡神经细胞数与NF-κB P65核阳性表达细胞数存在显著正相关(r=0.878,P<0.01).结论缺氧缺血诱导了海马CA1区NF-κB P65核移位即NF-κB激活;持续活化后的NF-κB可能与神经细胞的死亡机制有关
Effects of ethanol on the in situ synthesized Cu/SiO_2 catalyst: Texture, structure, and the catalytic performance in hydrogenation dimethyl oxalate to ethylene glycol

The Cu/SiO_2 catalysts were in situ synthesized by the hydrolysis of tetraethyl orthosilicate (TEOS) in one phase solution using ethanol as co-solvent or TEOS/H_2O two phases solution, followed by the precipitation of copper on SiO_2 by ammonia evaporation. In the hydrogenation of dimethyl oxalate, the catalyst prepared by one phase hydrolysis exhibited higher activity and ethylene glycol (EG) selectivity at lower temperature than that of two phases due to its larger BET surface area and multimodal pore distribution. At 488-503 K, the catalyst prepared in one phase solution with water/ethanol (W/E) volume ratio of 3:1 exhibited 90-95% EG selectivity, while catalyst prepared by two phase hydrolysis reached 90% EG selectivity only at 498-503 K
A novel method to prepare metal oxide electrode: Spin-coating with thermal decomposition

In this work, we propose a new spin-coating method coupling with high thermal decomposition, to prepare the tin-antimony (Sn-Sb) oxide electrode. The character of the spin-coating electrode was compared with the dip-coating electrode through X-ray diffraction (XRD), scanning electron microscopy (SEM), accelerated life test, cyclic voltammetry, and electrolytic degradability. The results showed that the spin-coating electrode had a better defined crystal form, a smoother and more compact surface than that of the dip-coating electrode. Service time of the spin-coating electrode was determined to be longer than 15 h, and it was less than 2 min for the dip-coating electrode. Electrochemical characterization analysis showed that the electrolytic degradability of the spincoating electrode is better than that of the dip-coating electrode
New thiopyran-4-spiro-2'-(1,3-dithiolane): Formation mechanism and crystal structure

Ethylene trithiocarbonate reacted with dimethyl acetylenedicarboxylate to furnish tetramethyl thiopyran-4-spiro-2'-(1,3-dithiolane)-2,3,5,6-tetracarboxylate, a new thiopyran-4-spiro-2'-(1,3-dithiolane) heterocyclic compound, as the minor product together with the major product dimethyl 2-thioxo-1,3-dithiole-4,5-dicarboxylate. The new heterocycle was probably formed through a [2 + 2] cycloaddition between ethylene trithiocarbonate and dimethyl acetylenedicarboxylate followed by a 1,3-dipolar cycloaddition or [4 + 2] cycloaddition. Crystal structure of the new compound revealed that the thiopyran ring and 1,3-dithiolane moiety were perpendicular to each other
冬凌草二萜类成分半数致死量的测定

目的: 研究冬凌草二萜类成分对小鼠的半数致死量 (LD_(50)). 方法: 按Bliss法设计试验, 对小鼠单次灌胃, 观察 14 d内小鼠的毒性反应和死亡情况, 以小鼠急性死亡率为指标, 测定冬凌草二萜类成分对小鼠LD_(50)和LD_(50)的95%的可信限. 结果: 冬凌草二萜类成分单次灌胃给药的LD_(50)为 1.138 g·kg~(-1), LD_(50)的95%的可信限为0.949~1.397 g· kg~(-1). 对死亡小鼠剖解后肉眼观察心、肝、肾、肺、脑、脾、胸腺等重要器官无明显异常发现, 但多数动物十二指肠色红充血. 结论: 冬凌草二萜类成分具有一定的毒性
医院药学信息服务系统的构建

目的: 在新医改背景下构建全方位医院药学信息服务系统. 方法: 分析医院药学信息服务对象, 充分利用综合性医院的资源优势和多种信息化手段. 结果: 构建面向社区的全程化药学服务体系. 结论: 建立全方位药学信息服务系统是实现全程化药学服务的必要手段
电子化在医院药学服务中的应用

目的介绍中国台湾地区义大医院和长庚医院的电子化服务. 方法通过在义大医院和长庚医院接受临床药师实务训练, 实地了解义大医院和长庚医院的电子化药学服务现状. 结果义大医院和长庚医院的药学服务已全面电子化, 其主要服务对象包括医生、病人和护士. 能为医生提供药品信息、多样化处方警示和临床药学等电子化药学服务; 在对门诊病人和住院病人采用面对面直接服务的同时, 还对院外病人开通计算机网络平台的间接服务. 结论 电子化药学服务方便、快捷, 信息量大、覆盖面广, 值得大陆药师借鉴
闽浙乡村行道树种结构特征的比较

随着新农村建设政策的稳步推进,乡村道路建设的不断改善,乡村行道树的建设逐渐受到重视.道路绿化具有生态保护,交通辅助,景观组织和文化隐喻等功能.当前,全国正开展新农村绿色家园建设,乡村行道树作为绿化的重要内容,在村庄内部,村庄与村庄之间,形成一个完整的绿化系统,合理选用乡村行道树对改善农村生态环境,提高乡村道路质量,美化乡村景观以及提高经济效益都有重要作用;然而,目前有关行道树的研究主要集中在城市[2-5],在一定区域尺度,有关乡村道路绿化树种选择,树种组成,树种特征,生长要素等等方面,目前尚无人涉及研究[6-8],难以为新农村绿色家园建设提供技术支撑.有鉴于此,本文对福建省和浙江省代表性村庄的行道树种进行了实地调查,分析了当前乡村行道树的特征并提出建议,以便为新农村行道树种的选择及经营管护提供参考
脑的可塑性与卒中后运动功能康复相关研究的Meta分析

脑卒中是发病率,致残率和致死率都很高的疾病,幸存者75%以上留有不同程度的后遗症.近年来脑卒中后的康复治疗引起高度重视[1],相应的措施及其机制研究也受到广泛关注[2].以往认为一侧大脑半球的受损所引起的神经功能缺损可以通过对侧代偿[3],之后发现卒中后受损侧大脑半球可塑性可以影响康复效果[4],但其证据并不充分.本文采用Meta分析探讨受损侧大脑半球可塑性变化与卒中后运动功能改善之间的联系,为康复治疗提供理论依据
A Study on Bisphenol A, Nonylphenol, and Octylphenol in Human Urine amples Detected by SPE-UPLC-MS

Objective To establish a comprehensive analytical method based on SPE-UPLC-MS for the simultaneous determination of bisphenol A (BPA), nonylphenol (NP), and octylphenol (OP) in urine samples. Methods Sixty urine samples collected from healthy subjects were analyzed for BPA, NP, and OP concentrations. The samples were de-conjugated by adding β-glucuronidase and sulfatase. After the enzymatic treatment, the samples were subjected to the OASIS HLB column solid phase extraction cartridges so as to be cleaned and concentrated. The UPLC separation was performed on a Acquity UPLCTM BEH C18 column (2.1x100 mm, 1.7 μm) with a gradient elution system of methanol-water as the mobile phase. Triple-quadrupole mass spectrometry analyzer was used for the qualitative and quantitative analysis of UPLC-MS/MS system. Results The limit of detection of BPA, NP, and OP was 0.10, 0.10, and 0.15 ng/mL, respectively. The recoveries of BPA, NP and OP were 80.1%-108%, 81.3%-109%, and 81.5%-98.7%, respectively. Among the 60 urine samples, BPA was detected in 8 samples at the level of 0.297-32.7ng/mL, NP was detected in 29 samples at the level of 1.69-27.8 ng/mL, and OP was detected in 17 samples at the level of 0.407-11.1 ng/mL. Conclusion The method is simple with high sensitivity and selectivity, and is suitable for the determination of BPA, NP, and OP in urine. As shown by our analysis, BPA, NP, and OP appear to be prevalent in human urine. This is particularly true for NP. The results from our study is therefore valuable for future studies to assess the exposure to BPA, NP, and OP in the general population
A New Precipitation Index for the Spatiotemporal Distribution of Drought and Flooding in the Reaches of the Yangtze and Huaihe Rivers and Related Characteristics of Atmospheric Circulation

Characteristics of the spatiotemporal distributions of precipitation anomalies in the reaches of the Yangtze River and Huaihe River (YHR) were studied using EOF method: Four main precipitation patterns for the YHR in summer identified by the first two modes: a region-wide flood over the entire YHR (RWF); a region-wide drought over the entire YHR (RWD); a flood in the south with a drought in the northern region of the Yangtze River (FS-DN); and a drought in the south with a flood in the northern region of the Yangtze River (DS-FN). Based on the first two modes and the actual precipitation departure percentage, a new precipitation index is defined in this paper. The typical flood/drought years associated with the various rainfall patterns defined by this precipitation index are more representative and closer to reality compared to some existing precipitation indexes which just use the area-mean precipitation or the EOF time components individually. The characteristics of atmospheric circulation in summer corresponding to the four main precipitation patterns over the YHR in summer show the features of atmospheric circulation differ in different precipitation pattern years. Although the different patterns share a common main influential circulation system, such as the blocking high over northeastern Asia, the low trough of westerly flows in the mid latitudes, the West Pacific Subtropical High (WPSH), and the high ridge over the Tibet Plateau, the difference in location and intensity of these systems can lead to different distributions of precipitation anomalies
The Significant Relationship between the Arctic Oscillation (AO) in December and the January Climate over South China

Using NCEP/NCAR reanalysis data, the China rainfall and surface temperature data of the China Meteorological Administration, and the Arctic Oscillation (AO) indices of NOAA, the author investigates relationships between the AO and the precipitation and temperature over China. There exists a good relationship between the AO index in December and the succeeding January precipitation over South China, indicating that when the December AO index is positive (negative), the January precipitation over South China increases (decreases). A remarkable negative correlation between the December AO index and the January surface temperature also exists over South China, indicating that when the December AO index is positive (negative), the January temperature over South China drops (rises). The occurrence of this anomalous climate is related to the anomalies of the atmospheric circulation systems. The December AO greatly influences circulation anomalies in January. A positive phase of the AO is found to lead to a stronger subtropical jet over the south side from the Iran Plateau to the Tibetan Plateau. Consequently, it results in a deepening pressure trough around the Bay of Bengal, which transports the warm and wet air to South China continuously. The Siberian High in January is stronger and extends farther southeastward. It results in continual cold air at 1000 hPa pouring into South China, inducing low temperature. Cooperating with the trough of the Bay of Bengal, anomalous precipitation occurs over South China. For the negative phase of the December AO, the opposite situation is observed
Geographical Patterns and Temporal Variations of Regional Dry and Wet Heatwave Events in China during 1960-2008

Daily maximum/minimum temperatures and relative humidity records from 510 stations in China for the period 1960-2008 were used to investigate geographical patterns and temporal variations of heatwave (HW) events. Dry and wet HW events were compared by different definitions. Regionally, both dry and wet HW events are commonly located in southeastern China in the monsoon area, with neither type occurring in the northeast part of Northeast China and Southwest China, while the north-northwest region of the country experiences dry HW events and a few wet HW events. In the southeast of the country, site dry HW events occurred from April to September and mostly in June, while site wet HW events occurred from April to October and mostly in September. In total, 163 regional wet HW events were identified. The ten longest regional wet HW events lasted for more than 20 days, while the mean duration for 163 events was about 11 days. For the top ten events, six occurred after the 1990s, compared with four before this time. Global surface warming was clear since 1979, but the frequency and severity of regional wet HW events were relatively low in the 1980s, increasing remarkably since the 1990s. Possible reasons for this might be the strong interdecadal and interannual variations in regional atmospheric circulations, as well as water transport related directly to temperature contrasts in different regions, rather than global-mean temperature changes
Changes in Seasonal Cycle and Extremes in China during the Period 1960-2008

Recent trends in seasonal cycles in China are analyzed, based on a homogenized dataset of daily temperatures at 541 stations during the period 1960-2008. Several indices are defined for describing the key features of a seasonal cycle, including local winter/summer (LW/LS) periods and local spring/autumn phase (LSP/LAP). The Ensemble Empirical Mode Decomposition method is applied to determine the indices for each year. The LW period was found to have shortened by 2-6 d (10 yr)~(-1), mainly due to an earlier end to winter conditions, with the LW mean temperature having increased by 0.2℃-0.4℃ (10 yr)~(-1), over almost all of China. Records of the most severe climate extremes changed less than more typical winter conditions did. The LS period was found to have lengthened by 2-4 d (10 yr)~(-1), due to progressively earlier onsets and delayed end dates of the locally defined hot period. The LS mean temperature increased by 0.1℃-0.2℃ (10 yr)-1 in most of China, except for a region in southern China centered on the mid-lower reaches of the Yangtze River. In contrast to the winter cases, the warming trend in summer was more prominent in the most extreme records than in those of more typical summer conditions. The LSP was found to have advanced significantly by about 2 d (10 yr)~(-1) in most of China. Changes 'in the autumn phase were less prominent. Relatively rapid changes happened in the 1980s for most of the regional mean indices dealing with winter and in the 1990s for those dealing with summer
A Comparative Analysis of Primary and Extreme Characteristics of Dry or Wet Status between Asia and North America

In this study, the Palmer Drought Severity Index (PDSI) was used to analyze the average and extreme dry/wet states of Asia and North America from 1953 to 2003. The results indicate that the two continents underwent drying trends during this period. Compared with North America, Asia showed more severe drought trends. However, more significant and regular seasonal variation for drought was found in North America. The driest regions in Asia were located in the northern region of China, Mongolia, and eastern mid-Siberian plateau. Most regions in central North America were relatively wetter than other regions. The northern and southwestern regions of North America, as well as the Atlantic and Pacific coastal areas, experienced the most drought during this period. A sharp increase of the drought area and the number of extreme drought events took place from 1997 to 2003 in both Asia and North America. Severe drought events were more likely to occur during the summer on both continents. Asia had the most extreme drought events during July, but North America reached its highest drought frequency from June to September. In Asia, a persistent increasing trend of extreme drought emerged throughout the studied period. However, a more complex evolution of drought emerged in North America: a decreasing trend appeared before the mid-1960s and an increasing trend appeared after the late 1970s. A relatively steady dry/wet status was observed between the mid-1960s and the late 1970s. The role of exceptional, extreme drought events with respect to the La Nina event was considered during 1997-2003
糖尿病患者自我注射胰岛素消毒现状分析

目的了解糖尿病患者自我注射胰岛素的消毒现状. 方法选取内分沁科336例自我注射胰岛素的门诊和住院患者, 应用自行设计的消毒知识和行为问卷进行调查. 结果患者消毒知识缺乏, 消毒行为存在很多问题. 结论 应当加强自我注射胰岛素患者的消毒知识健康教育, 以规范其消毒行为
Hopf Superquivers

In this paper, a super version of the Hopf quiver theory is developed. The notion of Hopf superquivers is introduced. It is shown that only the path supercoalgebras of Hopf superquivers admit graded Hopf superalgebra structures. A complete classification of such graded Hopf superalgebras is given. A superquiver setting for general pointed Hopf superalgebras is also built up. In particular, a super version of the Gabriel type theorem and the Cartier-Gabriel decomposition theorem is given
A Class of Generalized Nilpotent Groups

This paper considers such a group G which possesses nontrivial proper subgroups H1, H2 such that any proper subgroup of G not contained in H1 U H2 is p-closed and obtains that if G is soluble, then the number of prime divisors contained in|G|is 2,3 or 4; if not, then it has a form (x) X N where N/φ(N) is a non-abelian simple group. Then the structure of such a group is determined for p = 2, H1 = H2 under some conditions
Role of calcium conductance in firing behavior of retinal ganglion cells

Fohlmeister-Coleman-Miller model of retinal ganglion cells consists of five ion channels; these are sodium channels, calcium channels, and 3 types of potassium channels. An increasing number of studies have investigated sodium channels, voltage-gated potassium channels, and delayed rectifier potassium channels. However, little is known about calcium channels, and in particular the dynamics and computational models of calcium ions. Retinal prostheses have been designed to assist with sight recovery for the blind, and in the present study, the effects of calcium ions in retinal ganglion cell models were analyzed with regard to calcium channel potential and calcium-activated potassium potential. Using MATLAB software, calcium conductance and calcium current from the Fohlmeister-Coleman-Miller model, under clamped voltages, were numerically computed using backward Euler methods. Subsequently, the Fohlmeister-Coleman-Miller model was simulated with the absence of calcium-current (/ca) or calcium-activated potassium current (IK, ca). The model was also analyzed according to the phase plane method. The relationship curve between peak calcium current and clamped potentials revealed an inverted bell shape, and the calcium-activated potassium current increased the frequency of firing and the peak of membrane potential. Results suggested that calcium ion concentrations play an important role in controlling the peak and the magnitude of peak membrane voltage in retinal ganglion cells
Xuefuzhuyu injection induces neuronal differentiation of rat bone morrow mesenchymal stem cells

The primary effective components of Xuefuzhuyu, including Rhizoma Chqanxiong, Radix Salviae Miltiorrhiae, and Radix Angelicae Sinensis, have been shown to induce the differentiation of bone marrow mesenchymal stem cells (BMMSCs) into neuronal-like cells. However, there is little available evidence on the effects of the Chinese herbal compound Xuefuzhuyu on BMMSC differentiation. The present study investigated the effects of Xuefuzhuyu on differentiation of rat BMMSCs into neuronal-like cells, and evaluated the optimal concentration for inducing differentiation. Inverted microscopy was used to observe BMMSCs induced by Xuefuzhuyu; immunocytochemistry revealed expression of the neuronal marker neuron-specific enolase surface antigen in the majority of BMMSCs following treatment with Xuefuzhuyu at concentrations of 1, 3, 5, and 10 g/L. A concentration of 3 g/L resulted in highest neuron-specific enolase expression. These results suggest that BMMSCs can be induced to differentiate into neuronal-like cells with Xuefuzhuyu, and 3 g/L is the optimal inductive concentration for effective differentiation
穴位解剖实验教学基地的建设与实践探讨

目的在高等中医院校创建穴位解剖实验教学基地,探索学员在制作穴位解剖标本的实践中学习及掌握穴位的解剖特点和毗邻关系的可行性与重要性,为穴位解剖实践教学、标本资源库建设及高素质中医药人才培养作一探讨
大叶钩藤中柯诺辛碱的含量测定

目的高效液相色谱法测定大叶钩藤中柯诺辛碱的含量,为建立大叶钩藤的质量标准提供参考. 方法采用Discovery C18柱(25 cm×4. 6 mm, 5μm),流动相为甲醇: 0. 02%三乙胺水溶液=70:30 (V/V),流速为1. 0 ml/min,检测波长242 nm. 结果测得大叶钩藤中柯诺辛碱的含量平均值为0. 2240%,柯诺辛碱的平均回收率为99. 7%,RSD=1. 84% (n=3). 结论大叶钩藤中柯诺辛碱的含量为0. 224 0%;该方法简便可行,重复性好,可为大叶钩藤药材的质量控制提供参考
千层塔合剂对AD模型大鼠海马区C-FOS表达的影响

目的探讨千层塔合剂治疗AD的作用机理,为中医和地方特色药物治疗AD提供实验依据和临床指导. 方法采用腹腔注射D-gal6周致亚急性衰老模型,合并双侧海马区注射Aβ25-35复制AD模型;给予药物或生理盐水灌胃4周后,用免疫组化染色法检测大鼠海马区C-FOS表达的改变. 结果与模型组比较,千层塔合剂低剂量组、高剂量组可使 C-FOS的表达不同程度地下调,差异有显著性(P<0. 01),与脑复康组比较,千高组降低更为明显(P<0. 01). 结论千层塔合剂能显著降低AD模型大鼠海马区C-FOS的表达,抑制细胞凋亡
蔷薇红景天药材质量标准研究

目的研究建立新疆蔷薇红景天药材质量标准. 方法采用性状鉴别、显微鉴别、薄层鉴别,水分,灰分,杂质测定等研究方法. 结果蔷薇红景天具特殊香味,根茎具三生维管束,粉末明显可见木栓细胞、薄壁细胞、淀粉粒、螺纹导管、纤维,薄层可用红景天苷为对照进行鉴别;水分最高为8. 1%,灰分6. 5%,杂质1. 9%. 结论制定的新疆蔷薇红景天质量标准全面、可控
Growth and Physiological Features of Cyanobacterium Anabaena sp. Strain PCC 7120 in a Glucose-Mixotrophic Culture

Mixotrophic growth is one potential mode for mass culture of microalgae and cyanobacteria particularly suitable for the production of high value bioactive compounds and fine chemicals. The typical heterocystous cyanobacterium Anabaena sp. PCC 7120 was grown in the presence of exogenous glucose in light. Glucose improved the cell growth evidently, the maximal specific growth rate under mixotrophic condition(0.38 d-1)being 1.6-fold of that of photoautotrophic growth. Mixotrophy caused a variation in cellular pigment composition, increasing the content of chlorophyll a and decreasing the contents of carotenoid and phycobiliprotein relative to chlorophyll a. Fluorescence emission from photosystem II(PSII)relative to photosystem I was enhanced in mixotrophic cells, implying an increased energy distribution in PSII. Glucokinase(EC 2.7.1.2)activity was further induced in the presence of glucose. The mixotrophic culture was scaled up in a 15 L airlift photobioreactor equipped with an inner and an outer light source. A modified Monod model incorporating the specific growth rate and the average light intensity in the reactor was developed to describe cell growth appropriately. The understanding of mixotrophic growth and relevant physiological features of Anabaena sp. PCC 7120 would be meaningful for cultivation and exploitation of this important cyanobacterial strain
彩超诊断颈外静脉假性静脉瘤2例

讨论假性静脉瘤很少见, 故本组中诊断第l例较困难, 得到手术证实后对第2例诊断较易. 浅表假性静脉瘤多由原发性静脉管壁局部平滑肌纤维发育不良, 引起管壁变薄、破裂所致, 继发性多见于医源性穿刺、外伤、静脉炎等. 本组2例均因无痛性颈部包块就诊, 考虑原发性假性静脉瘤. 超声能明确假性静脉瘤的部位、大小、与颈静脉的关系及动态征象; CDFI可确定破口的位置、大小、血流方向及频谱特征. 假性静脉瘤应注意与真性静脉瘤及颈部囊肿相鉴别
Fabrication of a Ho~(3+)-PVC membrane sensor based on N-phenyl-2-(thiophen-2-ylmethylene)hydrazinecarbothioamide for determination of holmium ions

In this research, a new poly(vinyl chloride) (PVC) membrane sensor for Ho~(3+) ion based on N-phenyl-2-(thiophen-2ylmethylene)hydrazinecarbothioamide (PHC) as an ionophore was prepared. This sensor demonstrated good selectivity and sensitivity towards the holmium ion in comparison with variety of cations, including alkali, alkaline earth, transition and heavy metal ions. The effect of membrane composition and pH on the response properties of the electrode was investigated. In detail, the suggested sensor exhibited a Nernstian behavior (with a slope of 20.4 ± 0.3 mV decade~(-1)) in the range of 1.0 x 10 6 to 1.0× 10~(-2) mol/L with a detection limit of 6.2×10~(-7) mol/L. The response time was relatively quick in the whole concentration range (~5 s). The sensor usage was found to be at least 10 weeks in a pH range of 3.3-10.9. It was successfully applied in determination of fluoride ions in mouth wash preparations
A novel hydrophilic polystyrene-based beads for hydrophilic interaction chromatography by surface-initiated atom transfer radical polymerization

A one-step procedure to hydrophilize monodisperse poly (chloromethyl-styrene-co-divinylbenzene) beads has been presented with 2-hydroxy-3-[4-(hydroxymethyl)-1H-1,2,3-triazol-1-yl] propyl 2-methylacrylate (HTMA) as monomer by surface-initiated atom transfer radical polymerization (SI-ATRP). The length of the grafted poly (HTMA) chain was varied via controlling the ratio of HTMA to initiator on the surface of the beads. Using these grafted beads as the stationary phase in hydrophilic interaction chromatography, good separation was obtained for nucleosides in the mobile phase of acetonitrile-water. It was also found that the retention time and selectivity of solutes showed a positive relationship with the length of the grafted poly (HTMA) chain