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Search Results: 1 - 10 of 145549 matches for " LI Qi-Qin "
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Effects of environmental factors on growth and sporulation of Exserohilum rostratum causing banana leaf spot disease
环境因素对香蕉叶斑病菌喙突脐蠕孢生长和产孢的影响

LIN Shan-Hai,HUANG Si-Liang,CEN Zhen-Lu,QIN Li-Ping,FU Gang,LI Qi-Qin,
林善海
,黄思良,岑贞陆,覃丽萍,付岗,黎起秦

菌物学报 , 2013,
Abstract: 为进一步明确香蕉叶斑病菌喙突脐蠕孢的生物学特性,调查了部分环境因素(碳氮源、植物成分培养基)对供试菌株(CLER09、D087和JL05)的营养生长和产孢的影响。结果显示,分生孢子主要先从基部萌芽,在28℃下约培养10h后出现两端萌芽;供试菌株对测试的20种碳源及26种氮源显示相似的生长反应,均可利用除菊糖外的测试碳源及氮源进行营养生长和产孢;测试的6种植物成分培养基对供试菌株的营养生长效果皆优于PDA培养基;除燕麦培养基外,其余5种培养基对菌株CLER09和D087的产孢作用均优于PDA培养基;测试的6种培养基对菌株JL05的产孢作用均优于PDA培养基。不同植物成分培养基对该菌分生孢子形态影响较大,以米糠、象草培养基对菌株D087 和JL05的分生孢子长度和玉米粉培养基对菌株CLER09的分生孢子宽度的增长效果最为明显。
Optimization of culture medium and fermentation conditions for high production of antimicrobial substance by Bacillus subtilis strain B47
枯草芽孢杆菌B47菌株高产抗菌物质的培养基及发酵条件优化

YE Yun-Feng,LI Qi-Qin,YUAN Gao-Qing,FU Gang,MIAO Jian-Hua,LIN Wei,
叶云峰
,黎起秦,袁高庆,付岗,缪剑华,林纬

微生物学通报 , 2011,
Abstract: Bacillus subtilis strain B47 is an endophytic bacterium of tomato and can produce substance to inhibit the growth of Bipolaris maydis which can cause southern corn leaf blight. The optimal nitrogen source, carbon source and salt for the production of antimicrobial substance by strain B47 were tested. The medium composition and fermentation conditions were optimized by orthogonal experiments. The results showed that the optimal nitrogen source, carbon source and salt were yeast extract, sucrose and MgSO4·7H2O, respectively. The best medium was YSB (Yeast extract-sucrose-beef extract). The composition of the medium was 2% (W/V) sucrose, 2% (W/V) yeast extract, 1.5% (W/V) beef extract, 0.06% (W/V) MgSO4?7H2O and 0.000 9% (W/V) FeSO4·7H2O. The optimal fermentation conditions were the combination of temperature 30 °C, initial pH 7.0, incubation time 6 d, 1% inoculum volume percentage and medium volume 40 mL/200 mL.
A new species of Phomopsis causing brown spot of Ziziphus mauritiana
引起滇刺枣褐斑病的拟茎点霉属一新种

YUAN Gao-Qing,WEI Ji-Guang,LI Qi-Qin,LAI Chuan-Ya,
袁高庆
,韦继光,黎起秦,赖传雅

菌物学报 , 2008,
Abstract: 报道引起滇刺枣褐斑病的拟茎点霉新种--滇刺枣拟茎点霉Phomopsis mauritiana.新种的载孢体近球形,甲型分生孢子椭圆形或披针形,形态及大小有别于同属植物上已知的3种拟茎点霉.
Quality Control Schemes and Its Application to Automatic Surface Weather Observation System
地面自动站资料质量控制方案及应用

TAO Shi-wei,ZHONG Qi-qin,XU Zhi-fang,HAO Min,
陶士伟-
,仲跻芹,徐枝芳,郝民

高原气象 , 2009,
Abstract: 为满足精细、 短时天气预报的需求, 我国地面自动站(AWS)观测系统的建设日趋完善。AWS资料在数值预报系统中没得到充分使用的原因之一是AWS观测资料的特殊性及数值预报系统缺少有效针对AWS观测资料的质量控制(QC)方案。本文AWS QC方案在参考国际先进的AWS QC方案基础上, 根据我国地面自动站的特点和数值天气预报模式对地面资料应用的要求设计。其目的是解决AWS观测资料在数值预报中应用的质量问题。本方案采用多种质量控制技术, 其中包括台站气候极值检查、 要素间一致性检查、 时间一致性检查、 持续性检查、 背景场一致性检查、 空间一致性检查、 综合决策算法、 自动统计评估反馈技术。本文从检查方法对错误资料的敏感度和确定性进行理论分析表明, 该方案具有更强的敏感度和确定性。将该方案应用于北京地区2006年8月AWS实际观测资料检验, 结果表明, 该方案能有效地识别观测资料中存在明显错误的资料, 有效地为地面自动站资料在数值模式中的应用提供客观质量依据。
Risk Factors For Recurrent Stroke After Coronary Artery Bypass Grafting
Li Cao, Qin Li, Qi Bi, Qin-Jun Yu
Journal of Cardiothoracic Surgery , 2011, DOI: 10.1186/1749-8090-6-157
Abstract: Patients with a history of stroke who underwent CABG at Beijing An Zhen hospital from January 2007 to July 2010 were selected (n = 430), and divided into two groups according to the occurrence of postoperative stroke. Pre-operative and post-operative data were retrospectively collected and analyzed by univariate and multivariate logistic regression analyses.Thirty-two patients (7.4%) suffered post-operative stroke. Univariate analysis identified several statistically significant risk factors in the post-operative stroke group, including pre-surgical left ventricular ejection fractions (LVEF) ≤50%, on-pump surgery, post-operative atrial fibrillation (AF), and hypotension. Multivariable analysis identified 4 independent risk factors for recurrent stroke: unstable angina (odds ratio (OR) = 2.95, 95% CI: 1.05-8.28), LVEF ≤50% (OR = 2.77, 95% CI: 1.23-6.27), AF (OR = 4.69, 95% CI: 1.89-11.63), and hypotension (OR = 2.55, 95% CI: 1.07-6.04).Unstable angina, LVEF ≤50%, post-operative AF, and post-operative hypotension are independent risk factors of recurrent stroke in CABG patients with a previous history of stroke.Coronary artery bypass grafting (CABG) is an effective surgical therapy for coronary artery disease (CHD). However, the occurrence of stroke after CABG remains one of the most detrimental complications [1]. Due to improved surgical advances coupled with an increasing patient age, more patients with ≥1 co-morbidities are electing to undergo CABG. Included in this list of co-morbidities are an increasing number of patients with a history of stroke. Furthermore, atherosclerosis is a systemic disorder occurring throughout the vascular tree. Therefore, patients undergoing CABG are likely to show the concomitant occurrence of severe atherosclerosis in the carotid or cranial arteries, which often complicates the surgery.The reported incidence of stroke after CABG ranges from 1 to 5% [2]. The occurrence of stroke after CABG accounts for higher hospital mortality, longe
Duchesnea Phenolic Fraction Inhibits Tumor Growth through Restoring the Th1/Th2 Balance in U14 Cervical Cancer Bearing Mice  [PDF]
Bo Peng, Qin Hu, Lihua Sun, Xinmin Liu, Jianrong Li, Qi Chang, Liwei Wang, Jintian Tang
Chinese Medicine (CM) , 2012, DOI: 10.4236/cm.2012.31007
Abstract: Duchesnea indica (Andr.) Focke has been traditionally used to treat cancer in Asian countries for centuries. In the present study, transplanted U14 cervical cancer mouse model was used to evaluate the antitumor and immunomodulatory activity of Duchesnea phenolic fraction (DPF). ELISA and RIA assay were employed to measured the serum concentration of Th1/Th2 cytokines (IL-2, IL-4, IFN-γ and TNF-α). Administration with 0.25 g/kg, 0.5 g/kg and 1 g/kg DPF significantly reduced the tumor weight by 34.37%, 43.89% and 56.28%, respectively, as compared to the tumor control group. Furthermore, the serum level of IL-2, IFN-γ and TNF-α increased and IL-4 level decreased in a dose-dependent manner during DPF treatment, indicating that the antitumor activity of DPF may be associated with the decrease of TNF-α level and restoration of the balance of Th1/Th2 cell responses. These data suggested that DPF, a mixture of plant polyphenols, had potent anticancer activity which was in part accomplished by its immunomodulatory ability.
Analysis of Momordica charantia Polysaccharide Components and Their Effects on KA-Induced Oxidative Stress and Neuronal Loss in the Hippocampus of Epileptic Rats  [PDF]
Qiaoli Li, Nan Chen, Heng Cai, Yu Tang, Xiaoyan Zhou, Yue Huang, Muxin Gong, Cunyu Qin, Xuewen Wei, Suhua Qi
World Journal of Neuroscience (WJNS) , 2018, DOI: 10.4236/wjns.2018.82011
Abstract: Polysaccharides of Momordica charantia have been reported to be the primary bioactive components that confer its antioxidant activity. To some degree, antioxidants may provide beneficial effects on neuronal damage induced by seizures. However, the protective effects of Momordica charantia polysaccharides (MCPs) on seizures remain unclear. In this study, our purpose was to investigate the effects of MCPs on oxidative stress and neurodegeneration in an experimental Kainic acid (KA)-induced rat seizure model. MCPs treatments decreased the level of malondialdehyde (MDA) and increased the activities of superoxide dismutase (SOD) and catalase (CAT) in the hippocampus of the KA-induced animal model. Moreover, MCPs significantly attenuated KA-induced neuronal loss in the CA1 and CA3 hippocampal regions. Based on these results, MCPs exert neuroprotective effects by attenuating KA-induced neuronal damage in the brain through their free radical scavenging activities.
4,4′-[8b,8c-Bis(ethoxycarbonyl)-4,8-dioxo-2,3,5,6-tetrahydro-1H,4H-2,3a,4a,6,7a,8a-hexaazacyclopenta[def]fluorene-2,6-diyl]dipyridinium bis(tetrafluoridoborate)
Shu-Qi Qin,Tao Pang,Yi-Tao Li
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808023635
Abstract: In the title compound, C26H32N8O62+·2BF4 , the cation is built up from four fused rings, viz. two nearly planar imidazole rings and two triazine rings exhibiting chair conformations. One ethoxy group is disordered between two positions in an approximate ratio 3:2. The F atoms of the two anions are each rotationally disordered between two orientations in the same 3:2 ratio. The crystal structure is stabilized by intermolecular N—H...O, C—H...F and N—H...F interactions.
Quantum Bayesian rule for weak measurements of qubits in superconducting circuit QED
Peiyue Wang,Lupei Qin,Xin-Qi Li
Physics , 2014, DOI: 10.1088/1367-2630/16/12/123047
Abstract: Compared with the quantum trajectory equation, the quantum Bayesian approach has the advantage of being more efficient to infer quantum state under monitoring, based on the integrated output of measurement. For weak measurement of qubits in circuit quantum electrodynamics(cQED), properly accounting for the measurement backaction effects within the Bayesian framework is an important problem of current interest.Elegant work towards this task was carried out by Korotkov in "bad-cavity" and weak-response limits (arXiv:1111.4016).In the present work, based on insights from the cavity-field states (dynamics) and the help of an effective QTE, we generalize the results of arXiv:1111.4016 to more general system parameters.The obtained Bayesian rule is in full agreement with Korotkov's result in limiting cases and as well holds satisfactory accuracy in non-limiting cases in comparison with the QTE simulations. We expect the proposed Bayesian rule to be useful for future cQED measurement and control experiments.
On the geometry of the Hilbert schemes of points in the projective plane
Wei-ping Li,Zhenbo Qin,Qi Zhang
Mathematics , 2001,
Abstract: We classify minimal-degree curves in the Hilbert schemes of points on algebraic surfaces. When the algebraic surface is the projective plane, the nef cone and a flip structure of these Hilbert schemes are determined.
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