16 research outputs found
Primary Research on Zoospores、Resting Cysts and Related Life Cycle of Alexandrium tamarense
塔玛亚历山大藻是典型的赤潮有害藻,将细胞置于芯片上连续观察培养时,发现该藻除了能进行二分裂生殖以外,在休眠孢囊时期,体内原生质体快速运动,释放出大量的游动孢子(目前还未见文献报道)。本论文在该发现的基础上,对释放出的游动孢子、休眠孢囊及该游动孢子在生活史中的地位做一详细研究,主要内容如下: (1)利用微流控芯片并结合传统的实验室方法研究了塔玛亚历山大藻整个生活史概况:塔玛亚历山大藻细胞一般以游动细胞存在,在某种条件下游动细胞会脱鞭毛形成暂时性孢囊,暂时性孢囊在条件合适的情况下可以重新恢复运动能力形成游动细胞。游动细胞主要通过二分裂进行营养繁殖,在分裂一定时间后产生配子,进入有性生殖世代。配子...Alexandrium tamarense is one of red tide causative organisms which could form cyst and secrete paralytic shellfish poisoning (PSP) which is harmful for marine ecosystem and human health. It was reported that its motile cell proliferateed by binary fission. However, when the cells were placed into microfluidic chip for culture, many zoospores discharged out of the cysts. Based on this result, zoosp...学位:理学硕士院系专业:生命科学学院生物学系_水生生物学学号:2162007115189
Physical health care monitoring for people with serious mental illness
Background
Current guidance suggests that we should monitor the physical health of people with serious mental illness and there has been a significant financial investment over recent years to provide this.
Objectives
To assess the effectiveness of physical health monitoring as a means of reducing morbidity, mortality and reduction in quality of life in people with serious mental illness.
Search methods
We searched the Cochrane Schizophrenia Group Trials Register (October 2009) which is based on regular searches of CINAHL, EMBASE, MEDLINE and PsycINFO.
Selection criteria
All randomised or quasi-randomised clinical trials focusing on physical health monitoring versus standard care or comparing i) self monitoring vs monitoring by health care professional; ii) simple vs complex monitoring; iii) specific vs non-specific checks iv) once only vs regular checks or v) comparison of different guidance.
Data collection and analysis
The authors (GT, AC, SM) independently screened search results and identified three studies as possibly fulfilling the review's criteria. On examination, however, all three were subsequently excluded.
Main results
We did not identify any randomised trials which assessed the effectiveness of physical health monitoring in people with serious mental illness.
Authors' conclusions
There is no evidence from randomised trials to support current guidance and practice. Guidance and practice are based on expert consensus, clinical experience and good intentions rather than high quality evidenc
载体焙烧温度对Rh-Mn-Li/SBA-15催化CO加氢性能的影响
SBA-15分别于550、700、800和900°C进行焙烧,然后以等体积共浸渍法将Rh、Mn和Li负载其上。催化剂的性能用CO加氢反应进行评价。催化剂分别用N2物理吸附、X射线衍射、透射电子显微镜、H_2化学吸附和傅里叶变换红外光谱进行表征。即使在900°C下进行焙烧,SBA-15的结构仍得到保持。但是,当焙烧温度从550°C升高到900°C,SBA-15的比表面积、孔径和总孔容分别从842.6 m2·g-1(-1)、9.57 nm和1.18 cm3·g-1(-1)降到246.4 m2·g-1(-1)、5.62 nm和0.34 cm3·g-1(-1)。此外,Rh颗粒的尺寸都在1.5-4.0 nm范围内,并且随着载体的焙烧温度增加而增加。另外,Rh颗粒更倾向位于高温焙烧载体的介孔内,这可能是因为经过高温焙烧,载体微孔下降。所以,H2和CO更易与负载在高温焙烧后的载体上的Rh颗粒接触。因此,当载体焙烧温度达到900°C时,Rh-Mn-Li/SBA-15催化剂有非常高的C(2+)含氧化合物的活性和选择性
载体焙烧温度对Rh-Mn-Li/SBA-15催化CO加氢性能的影响
SBA-15分别于550、700、800和900°C进行焙烧,然后以等体积共浸渍法将Rh、Mn和Li负载其上。催化剂的性能用CO加氢反应进行评价。催化剂分别用N2物理吸附、X射线衍射、透射电子显微镜、H_2化学吸附和傅里叶变换红外光谱进行表征。即使在900°C下进行焙烧,SBA-15的结构仍得到保持。但是,当焙烧温度从550°C升高到900°C,SBA-15的比表面积、孔径和总孔容分别从842.6 m2·g-1(-1)、9.57 nm和1.18 cm3·g-1(-1)降到246.4 m2·g-1(-1)、5.62 nm和0.34 cm3·g-1(-1)。此外,Rh颗粒的尺寸都在1.5-4.0 nm范围内,并且随着载体的焙烧温度增加而增加。另外,Rh颗粒更倾向位于高温焙烧载体的介孔内,这可能是因为经过高温焙烧,载体微孔下降。所以,H2和CO更易与负载在高温焙烧后的载体上的Rh颗粒接触。因此,当载体焙烧温度达到900°C时,Rh-Mn-Li/SBA-15催化剂有非常高的C(2+)含氧化合物的活性和选择性
Li助剂对Co/AC催化剂上CO加氢制直链混合伯醇反应性能的影响
采用CO加氢反应、X射线衍射、程序升温还原和CO程序升温脱附等技术研究了Li助剂对活性炭负载的Co催化剂(Co/AC)上CO加氢反应性能的影响.结果表明,Li的添加抑制了气态烃的生成,提高了C5+和直链混合伯醇的选择性,但催化剂活性下降.这可能源于Li的加入抑制了Co2+物种的还原,降低了反应速控步骤——强吸附CO的解离能力.另外,Li也促进了Co2C物种的生成,使得产物中混合醇的比例增加
Co_2C上CO的程序升温脱附和程序升温表面反应研究
采用CO与金属Co在473 K反应400 h以上合成了Co2C样品, 采用X射线衍射、透射电镜和CO程序升温还原对样品进行了表征, 并采用CO程序升温脱附和CO程序升温表面反应研究了Co2C对CO的吸附及其加氢活化行为. 结果表明, Co2C微观结构由体相和表面钝化层两部分组成. 表面钝化层可被CO于477 K左右去除. CO在Co2C上有2个脱附峰, 其中低温脱附峰可能源于Co2C上吸附的CO, 而高温脱附峰可能对应于残留于Co2C晶格内的CO. Co2C上吸附的CO可与H2反应生成醇
Co_2C上CO的程序升温脱附和程序升温表面反应研究
采用CO与金属Co在473 K反应400 h以上合成了Co2C样品, 采用X射线衍射、透射电镜和CO程序升温还原对样品进行了表征, 并采用CO程序升温脱附和CO程序升温表面反应研究了Co2C对CO的吸附及其加氢活化行为. 结果表明, Co2C微观结构由体相和表面钝化层两部分组成. 表面钝化层可被CO于477 K左右去除. CO在Co2C上有2个脱附峰, 其中低温脱附峰可能源于Co2C上吸附的CO, 而高温脱附峰可能对应于残留于Co2C晶格内的CO. Co2C上吸附的CO可与H2反应生成醇
Structural features and evolution of Paleozoic faults in Eastern Shaya Uplift, Northern Tarim Basin, NW China(塔北沙雅隆起东段古生代断裂特征及演化)
依据二维地震剖面的精细地质解释,将塔北沙雅隆起东段自加里东中-晚期以来的断裂活动细分为3期,并对其复合发育过程进行了探讨.研究表明:加里东中-晚期,区内主要发育近NW向的小型逆断层;海西早期,近EW向的压扭断裂开始大规模发育,部分近NW向的断裂也开始扭动,二者呈复合构造样式;海西晚期,区内断裂继承性活动,EW向断裂发生大规模逆冲活动,地层被大幅抬升,并遭受剥蚀.该项研究对于深化塔里木板块北部古生代构造变形研究以及油气勘探等都具有重要的意义
