Abundance and production of bacteria and their correlations with environmental factor

以2014年8月南海北部海水样品为研究对象,利用平板计数法和流式细胞仪计数法对南海北部表层和垂直海域可培养细菌和细菌总数分布状况进行研究,对细菌; 生产力进行测定,并结合环境因子进行相关性分析。结果表明:珠江口到南海北部海域,水平方向可培养细菌总数变化范围是3.70*10~2 ~; 1.42*10~3 CFU/mL,细菌总数变化范围是5.12 * 10~5 ~1.61 * 10~6; cells/mL,细菌生产力的变化范围是0.03 ~0.40 mg/m~3/h;垂直方向上可培养细菌变化范围是1.08 *10~3 ~9.00; *10~3 CFU/mL,细菌生产力变化范围是0.01 ~0.08; mg/m~3/h,其中表层海水中的细菌生产力明显高于底层。与环境因子相关性分析表明,水平方向上,影响南海北部表层海水细菌总数和细菌生产力的主要因; 素是温度、盐度、硝酸盐(NO_3-N)、硅酸盐(SiO_3-Si)、亚硝酸盐(NO_2-N)和磷酸盐(PO_4-P)(P<0.05);垂直方向上; ,影响南海北部可培养细菌总数的主要因素是NO_2-N(P<0.05),影响细菌生产力的主要影响因素是温度和盐度(P; <0.05)。可见,南海北部表层海水中细菌总数高于可培养细菌总数2; ~3个数量级,表明该海域表层海水存在大量不可培养细菌;细菌的生命活动在海水表层相较底层更为活跃。Distribution of abundance and production of bacteria and their; correlations with environmental factor were investigated, using plate; count method and flow cytometry, in the surface and vertical waters of; the northern south China sea in August 2014. The cultivable bacterial; abundance ranged from 3.70 * 10~2 CFU/mL to 1.42 * 10~3 CFU/ mL, the; total bacterial abundance ranged from 5.12 * 10~5 cells/mL to 1.61 *; 10~6 cells/mL and the bacterial productions varied from 0.03 mg/m~3/h to; 0.40 mg/m~3/h in horizontal distribution. In vertical distribution, the; cultivable bacterial abundance ranged from 1.08 * 10~3 CFU/mL to 9.00 *; 10~3 CFU/mL and the bacterial productions varied from 0.01 mg/m~3/h to; 0.08 mg/m~3/h, respectively. The correlation analysis results showed; that the environmental factors affecting the abundance of total bacteria; and bacterial productivity included temperature, salinity,; nitrate(NO_3-N),silicate (SiO_3-Si), nitrite (NO_2-N),and phosphate; (PO_4-P) (P<0.05). NO_2-N was the main influencing factor to cultivable; bacteria abundance (P < 0.05), while bacterial productivity was highly; correlated with temperature and salinity in vertical distribution of; northern south China sea (P < 0.05). The total bacterial abundance was 2; ~ 3 orders of magnitude higher than cultivable bacteria, suggesting that; there were many uncultured bacterium in surface water of northern south; China sea and bacterial activities in the surface maybe more active than; in the bottom.全球变化与海气交互作用; 国家重点研发计划全球变化及应对专项; 海洋公益性行业科研专

一类非线性双重退缩抛物方程的Cauchy 问题

本文研究了一类非线性双重退缩抛物方程 ？？ Cauchy问题解的存在唯一性以及解的长时间性

Synthesis and Antibacterial Effect of Isothiazolinone Derivatives

以苯并异噻唑-3-酮为原料合成了4种新型衍生物——3-氯丙酰氯-苯并异噻唑啉酮、丙酰氯-苯并异噻唑啉酮、丙烯酰氯-苯并异噻唑啉酮、甲基丙烯酰氯-苯并异噻唑啉酮;目标化合物的结构经过1HNMR和质谱(MS)分析确认。同时检测这4种化合物对几种常见微生物——大肠杆菌(Escherichia coli)、枯草芽孢杆菌(Bacillus subtilis)和金黄色葡萄球菌(Staphyloccus aurueus)的抗菌活性。结果表明;这4种化合物在较低浓度下(≤25 mg/L)对大肠杆菌和枯草芽孢杆菌的抑菌率均达到80%以上;而对金黄色葡萄球菌的抑菌效果较差;只有高浓度(≥50 mg/L)下才能明显抑制其生长

浙江古田山亚热带常绿阔叶林开花和结实物候的种间种内差异

植物物候学主要研究植物的生活史事件发生时间和环境因子之间的关系.物候作为植物重要的功能性状,却未见有在群落水平上将植物物候变异和群落结构特征(多度)联系起来探究植物物候变异规律的报道.为了探索物候性状的种间种内变异规律,2012年4月~2015年8月在中国东部地区浙江省古田山国家级自然保护区亚热带常绿阔叶林24hm~2大样地(GTS;29°10′19.4″~29°17′41.4″N,118°03′49.7″~118°11′12.2″E)内,对106种植物的物候进行连续观测,用标准差定性分析物候的种间和种内差异.结果表明,影响开花物候的气候因子为降水,群落开花高峰集中在5月,结实成熟高峰集中在10月.群落结实物候种间差异小于开花物候,其中结实物候种间差异为41天,开花物候种间差异为52天;群落水平植物开花和结实物候的种内变异小于种间;大部分物种开花物候的种内变异小于结实物候.本研究首次探讨了物候期种内变异系数和物种多度的关系,也是首次研究物候种内变异系数与物候期早晚的关系,发现群落物候种内变异与物种的多度不相关,群落开花物候种内变异与物候期的关系不显著,群落结实物候的种内变异和物候期具有显著负相关关系,即物候期早的结实物候种内变异大,物候期晚的结实物候种内变异小.将植物物候变异和群落结构特征(多度)联系起来探究植物物候变异规律,有利于理解物候的改变是怎样影响物种的相互作用和适合度,这对于在气候变化大背景下理解植物性状变异及物种分化和群落动态变化具有重要意义

面向视频侦查应用的监控视频关键帧检测软件设计

为解决视频侦查工作中由于监控视频数据量大所导致的案件相关信息获取实时性差、误判与漏判等问题，利用数据流图深入分析了视频侦查工作对关键帧检测的需求，在关联数据流图、顸层数据流图与统计分析表的基础之上，提出了能够满足现阶段视频侦查应用的监控视频关键帧检测软件的总体设计和人机交互界面设计方案

Effectiveness and mechanism of internet-based self-help intervention for depression： The Chinese version of MoodGYM

抑郁症是全球性的重要公共健康问题,抑郁症的网络化认知行为治疗近年来备受关注。本研究采用随机对照组试验考察抑郁症网络化干预程序Mood GYM中文版对中国大学生抑郁患者的在线干预效果,并且使用多重中介模型同时探索了基于临床实践提出的认知歪曲（ATQ和DAS）与认知领域研究发现的解释偏差（SST）在抑郁症网络化认知行为治疗中的作用机制。结果发现：（1）相较之对照组,Mood GYM对中国大学生抑郁的网络化自助干预具有中到大的效果量（CES-D,d=0.93;PHQ-9,d=0.79）;（2）Mood GYM也显著降低抑郁患者的负性自动思维（ATQ）、消极解释偏差（SST）和功能失调性态度（DAS）;（3）自动思维（ATQ）和消极解释偏差（SST）二者的改变在抑郁症网络化认知行为治疗效果中起中介作用,功能失调性态度改变的中介效应不显著。抑郁症的网络化干预还存在着诸如脱落率较高等多种局限,推荐作为传统心理治疗的额外补充手段,也可作为梯度治疗模型的自助式初级干预。</p

抑郁症网络化自助干预的效果及作用机制——以汉化MoodGYM为例

抑郁症是全球性的重要公共健康问题,抑郁症的网络化认知行为治疗近年来备受关注。本研究采用随机对照组试验考察抑郁症网络化干预程序Mood GYM中文版对中国大学生抑郁患者的在线干预效果,并且使用多重中介模型同时探索了基于临床实践提出的认知歪曲（ATQ和DAS）与认知领域研究发现的解释偏差（SST）在抑郁症网络化认知行为治疗中的作用机制。结果发现：（1）相较之对照组,Mood GYM对中国大学生抑郁的网络化自助干预具有中到大的效果量（CES-D,d=0.93;PHQ-9,d=0.79）;（2）Mood GYM也显著降低抑郁患者的负性自动思维（ATQ）、消极解释偏差（SST）和功能失调性态度（DAS）;（3）自动思维（ATQ）和消极解释偏差（SST）二者的改变在抑郁症网络化认知行为治疗效果中起中介作用,功能失调性态度改变的中介效应不显著。抑郁症的网络化干预还存在着诸如脱落率较高等多种局限,推荐作为传统心理治疗的额外补充手段,也可作为梯度治疗模型的自助式初级干预

阵发性睡眠性血红蛋白尿症伴可逆性后部脑病综合征1例报道 Paroxysmal Nocturnal Hemoglobinuria with Posterior Reversible Encephalopathy Syndrome: A Case Report

可逆性后部脑病综合征（posterior reversible encephalopathy syndrome，PRES）是一种以可逆性神经系统损害和特异性影像学表现为主的临床-影像学综合征，阵发性睡眠性血红蛋白尿症（paroxysmal nocturnal hemoglobinuria，PNH）是临床上的罕见疾病。本文介绍1例有PNH的老年男性患者，患者长期慢性溶血性贫血，不规律服用小剂量免疫抑制剂，短期间断输入共计10 U洗涤红细胞后，出现伴有头痛、痫性发作、精神行为异常、血压异常增高及微量蛛网膜下腔出血的PRES，此病需与脑静脉及静脉窦血栓形成和可逆性脑血管收缩综合征等疾病相鉴别。本文旨在提高临床医师对此类患者的预防、早期识别及应对能力。 Abstract: Posterior reversible encephalopathy syndrome (PRES) is a clinical-imaging syndrome dominated by reversible neurological damage and specific imaging manifestations, and paroxysmal nocturnal hemoglobinuria (PNH) is a clinically rare disease. This paper described a case of an elderly male patient with PNH who had long-term chronic hemolytic anemia. After irregularly taking low-dose immunosuppressants and short-term intermittent infusion of 10 U of washed erythrocytes, he developed a PRES with headache, seizures, mental behavioural abnormalities, abnormally high blood pressure, and trace subarachnoid hemorrhage. It should be differentiated from diseases such as cerebral venous and venous sinus thrombosis and reversible cerebral vasoconstriction syndrome. The aim of this paper is to improve the clinicians’ ability to prevent and identify this type of patients at an early stage

Small-sized single-track travel mechanism

本实用新型涉及特种机器人的行走机构,具体地说是一种小型单轨道移动机构,包括底盘及两个相互独立、结构相同的转向架,每个转向架分别在轨道上运行,底盘分别与两个转向架相连;转向架包括驱动电机、固定架、主动行走轮、从动行走轮、导向轮及转盘,其中主动行走轮及从动行走轮相互独立、分别可转动地安装在固定架上,驱动电机固接在固定架上,主动行走轮与驱动电机的输出轴相连;在固定架的顶部设有转盘,底盘置于转盘上,转盘相对于底盘可转动,固定架的底部安装有多个导向轮。本实用新型适合各种弯轨形状,转弯半径小而灵活,转盘可相对于底盘有角度上的变化,避免移动机构自身干涉,实现了移动机构在各种弯道上的平稳运行

一种小型单轨道移动机构

Disclosed in the present invention is a moving mechanism of special robots, more specifically a small single-rail moving mechanism. The mechanism comprises a chassis (2) and two independent bogies (1) having the same structure, wherein each bogie (1) runs on a rail (3) independently, and the chassis (2) is connected with the two bogies (1) respectively the bogie (1) comprises a driving motor (4), a fixing frame (5), driving running wheels (6), slave running wheels (7), guide wheels (8) and a rotating disk (9), wherein the driving running wheels (6) and the slave running wheels (7) are independent of each other and are mounted on the fixing frame (5) respectively, the driving motor (4) is fixedly connected on the fixing frame (5), and the driving running wheels (6) is connected with the output shaft of the driving motor (4) the rotating disk (9) is provided on the top of the fixing frame (5). The chassis (2) is arranged on the rotating disk (9), and the rotating disk (9) can rotate relative to the chassis (2). Several guide wheels (8) are mounted on the bottom of the fixing frame (5). The small single-rail moving mechanism is suitable for a variety of shapes of curved rails, and its turning radius is small and flexible. The angle of the rotating disk (9) relative to the chassis (2) can be changed, so the interference within the moving mechanism is avoided, and the smooth running of the moving mechanism on variety kinds of curved rails can be realized.</p