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现场研究──螺杆泵在井下闭回路注入系统中的应用

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国外油田工程 1996年第9期12卷 24-27页

作者： s.t.Klein s.thompson 陈舸王北辛胜利油田研究院

本文中的资料以一个实验性的闭回路注入系统的现场试验为基础。该项试验的基本目的是确定系统的功能和未来的可行性。

关键词：螺杆泵抽油杆油气井

Evaluating the Efficiency of Cadmium Removal by Alginate Hydrogels from Water Using 5,7-Dibromo-8-hydroxyquinoline as a Complexing Reagent

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Precision Chemistry 2023年第9期1卷 538-547页

作者： Abhijit B.Phalke Varuna s.Watwe sunil D.Kulkarni Preeti s.Kulkarni Post Graduate and Research Center Department of ChemistryMES Abasaheb Garware CollegePune 411004 MaharashtraIndia Affiliated with savitribai Phule Pune University(Formerly University of Pune) Pune 411007 MaharashtraIndia

Cadmium toxicity in wastewater is a rising concern due to industries like batteries,metallurgy,electroplating,plastic stabilizers,and *** quantitative detection of Cd^(2+)and its remediation from wastewater samples are of major concern from an environmental point of *** the present work,an effective spectrophotometric method has been reported using 5,7-dibromo-8-hydroxyquinoline(DBHQ)as a complexing agent for Cd^(2+).this method has advantages like using recyclable,less toxic solvents and easy sample *** limit of detection,limit of quantification,and sensitivity of the proposed method were found to be 33.30,36.70 mg L^(−1),and 2×10^(−3),*** DBHQ method was validated using atomic absorption spectroscopy,and the recovery percentage was more than 98%.these results indicate that DBHQ can be effectively used for monitoring Cd^(2+)in aqueous *** method developed was further employed for monitoring Cd^(2+)adsorption on calcium alginate(AL)*** adsorption studies were done to optimize parameters of Cd^(2+)removal using AL hydrogels,and the data obtained were used for kinetic and thermodynamic *** studies indicated that the pseudo-first-order model showed better fitting,and thermodynamic studies showed Freundlich-like *** maximum adsorption capacity of Cd^(2+)on AL hydrogels was found to be 56.45 mg g^(−1).the validation studies of DBHQ were performed using statistical analysis methods like t-tests and one-way variance.

关键词： cadmium toxicity 5 7-dibromo-8-hydroxyquinoline spectrophotometric method adsorption studies wastewater remediation calcium alginate hydrogels

Discovering statistics : brief version

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Discovering statistics : brief version

2011年

作者： Daniel t. Larose instructor''s edition material written by Daniel t. Larose Christina Morian and Lloyd Jaisingh.

来源：畅想之星图书光盘版（南... 评论

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高温高压下Fe-Mn-s体系的性状

中南大学学报(自然科学版) 1986年第4期 17-23+112页

作者：王大伟 s.D.scott t.Bryndzia 中南工业大学多伦多大学

硫锰矿与陨硫铁、铁平衡时,压力、温度与硫锰矿组份之间的关系,用实验方法得以确定。实验的压力条件是1bar,2kbar,5kbar和7kbar;温度范围是500℃到900℃。通过实验得出其间的关系,用多元回归的方法整理成下列公式: Pkbar=28.1624(t/10~3... 详细信息

硫锰矿与陨硫铁、铁平衡时,压力、温度与硫锰矿组份之间的关系,用实验方法得以确定。实验的压力条件是1bar,2kbar,5kbar和7kbar;温度范围是500℃到900℃。通过实验得出其间的关系,用多元回归的方法整理成下列公式: Pkbar=28.1624(t/10~3)-39.8824(N/10~2)-352.3896(t~2/10~6) +912.9442(t·N/10~5)-627.8129(N~2/10~4+18.9960) 硫锰矿和陨硫铁、铁平衡时的最终温度,根据Keil和shinner等的研究结果,选定为200℃。

关键词：硫锰矿陨硫铁平衡温度组成

几种内吸杀虫剂用作土壤施药对马铃薯棉蚜防治效果的比较

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植物医学 1986年第4期 41-41页

作者： s.s.MIsRA B.t.RAJ 兰景华

在印度,桃蚜Myzus Persicae sul-zer;棉蚜Aphis gossypii Glover和豆卫矛蚜Aphis fabac scop.是马铃薯上的重要蚜虫(Verma,1977)。而且,由于这些蚜虫吸取植物汁液,还起着病毒病传病媒介的作用,使马铃薯块茎退化而不适宜作种用(Rutaul和M... 详细信息

在印度,桃蚜Myzus Persicae sul-zer;棉蚜Aphis gossypii Glover和豆卫矛蚜Aphis fabac scop.是马铃薯上的重要蚜虫(Verma,1977)。而且,由于这些蚜虫吸取植物汁液,还起着病毒病传病媒介的作用,使马铃薯块茎退化而不适宜作种用(Rutaul和Misra,1979)。在印度,由于卷叶病毒和马铃薯y病毒造成的马铃薯产

关键词：马铃薯棉蚜杀虫剂

A review of direct numerical simulations of astrophysical detonations and their implications

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Frontiers of physics 2013年第2期8卷 189-198页

作者： suzanne t. Parete-Koon Christopher R. smith thomas L. Papatheodore O. E. Bronson Messer National Center for Computational sciences Oak Ridge National Laboratory Oak Ridge USA TN 37831-6354 Department of Physics and Astronomy University of tennessee KnoxvilleUSA TN 37996-1200

Multi-dimensional direct numerical simulations （DNs） of astrophysical detonations in degenerate matter have revealed that the nuclear burning is typically characterized by cellular structure caused by transverse instabilities in the detonation front. type Ia supernova modelers often use one- dimensional DNs of detonations as inputs or constraints for their whole star simulations. While these one-dimensional studies are useful tools, the true nature of the detonation is multi-dimensional. the multi-dimensional structure of the burning influences the speed, stability, and the composition of the detonation and its burning products, and therefore, could have an impact on the spectra of type Ia supernovae. Considerable effort has been expended modeling type Ia supernovae at densities above 1 ~ 107 ***-3 where the complexities of turbulent burning dominate the flame propagation. How- ever, most full star models turn the nuclear burning schemes off when the density falls below 1 ~ 107 ***-3 and distributed burning begins. the deflagration to detonation transition （DDt） is believed to occur at just these densities and consequently they are the densities important for studying the properties of the subsequent detonation. this work will review the status of DNs studies of detona- tions and their possible implications for type Ia supernova models. It will cover the development of Detonation theory from the first simple Chapman-Jouguet （C J） detonation models to the current models based on the time-dependent, compressible, reactive flow Euler equations of fluid dynamics.

关键词： supernova detonations direct numerical simulations

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Ct评估胆管癌患者的主动脉旁淋巴结转移

世界核心医学期刊文摘（胃肠病学分册） 2006年第2期2卷 27-28页

作者： Noji t. Kondo s. Hirano s. 李明 Department of surgical Oncology Hokkaido University Graduate School of Medicine N15 W7 Kita-ku Sapporo 060- 8638 Japan

Background. the extent of paraaortic lymph node (PAN) metastasis parellels that of distant metastases in patients with biliary carcinoma. Accurate preoperative assessment of PAN metastasis has a crucial impact on surgical indications. In this retrospective study, we evaluated whether computed tomography (Ct) scans were useful for diagnosing PAN metastases and excluding patients with PAN metastases from an indication for surgery. Methods. Between March 1999 and November 2003, 57 patients with biliary carcinoma underwent radical lymphadenectomy or surgical biopsy of PANs. Nine of these patients were diagnosed as having PAN metastasis microscopically. All patients had undergone abdominal Ct scans before surgery. to diagnose PAN metastases, we used the following diagnostic criteria. (1) size; when lymph nodes were greater than 12 mm, 10 mm, 8 mm, or 6 mm in longo or short- axis diameter, the nodes were considered metastatic. (2) shape and size; when the axial ratio of a lymph node was greater than 0.5, 0.7, 1.0, and the maximum diameter of the long or short axis was greater than 12 mm, 10 mm, 8 mm, or 6 mm, the node was considered metastatic. (3) Internal structure; if the internal structure of a PAN was heterogeneous, the node was considered metastatic. A positive predictive value was calculated for each included criterion when patients numbered ten or more. Results. Positive predictive values using the above criteria ranged from 13% to 36% . Only one patient had PANs with heterogeneous internal structures. Conclusions. We were unable to determine surgical indications based on the morphological criteria revealed by a Ct scan.

关键词：胆管癌 Ct 淋巴结转移短轴直径治疗指征手术指征组织活检小淋巴结外科手术轴率

treatment with NADPH oxidase inhibitor apocynin alleviates diabetic neuropathic pain in rats

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Neural Regeneration Research 2018年第9期13卷 1657-1664页

作者： Murat Olukman Aytül onal Fatma Gül celenk Yigit Uyankgil türker cavusoglu Neslihan Düzenli sibel ülker Department of Pharmacology Faculty of Medicine Ege University Bornova IzmirTurkey Department of Medical Genetics Faculty of Medicine Ege University Bornova Izmir Turkey Department of Histology and Embryology Faculty of medicine cord Blood Cell and Tissue Research and Application Center Ege University Bornova Izmir Turkey

Increased reactive oxygen species by the activation of NADPH oxidase（NOX） contributes to the development of diabetic ***,a NOX inhibitor,increases sciatic nerve conductance and blood flow in diabetic *** investigated potential protective effect of apocynin in rat diabetic neuropathy and its precise mechanism of action at molecular *** models of streptozotocin-induced diabetes were treated with apocynin（30 and 100 mg/kg per day,intragastrically） for 4 *** hyperalgesia and allodynia were determined weekly using analgesimeter and dynamic plantar *** blot analysis and histochemistry/immunohistochemistry were performed in the lumbar spinal cord and sciatic nerve *** injection reduced pain threshold in analgesimeter,but not in *** treatment increased pain threshold *** blot analysis showed an increase in catalase and NOX-p47 phox protein expression in the spinal ***,protein expressions of neuronal and inducible nitric oxide synthase（n NOs,i NOs）,superoxide dismutase,glutathion peroxidase,nitrotyrosine,tumor necrosis factor-α,interleukin-6,interleukin-1β,aldose reductase,cyclooxygenase-2 or MAC-1（marker for increased microgliosis） in the spinal cord remained *** blot analysis results also demonstrated that apocynin decreased NOX-p47 phox expression at both doses and catalase expression at 100 mg/kg per *** of diabetic sciatic nerve revealed marked degeneration.n NOs and i NOs immunoreactivities were increased,while s-100 immunoreactivity（schwann cell marker） was decreased in sciatic *** treatment reversed these changes *** conclusion,decreased pain threshold of diabetic rats was accompanied by increased NOX and catalase expression in the spinal cord and increased degeneration in the sciatic nerve characterized by increased NOs expression and schwann cell *** treatment attenua

关键词： apocynin diabetic complications experimental diabetes mellitus neuropathic pain NADPH oxidase sciatic nerve spinal cord Western blotting peripheral nerve injury neural regeneration

Reverse Genetic Analysis of Adaptive Mutations within the Capsid Proteins of Enterovirus 71(EV-A71) strains Necessary for Infection of CHO-K1 Cells

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Virologica sinica 2020年第1期35卷 110-114页

作者： Carla Bianca Luena Victorio Yishi Xu Qimei Ng Vincent t.K.Chow Kaw Bing Chua temasek Lifesciences Laboratory 1 Research LinkNational University of SingaporeSingapore 117604Singapore Host and Pathogen Interactivity Laboratory Department of MicrobiologyYong Loo Lin School of MedicineNational University Health SystemNational University of SingaporeSingapore 117545Singapore Present Address:Laboratory for translational and Molecular Imaging Cancer and Stem Cell Biology ProgrammeDuke-NUS Medical SchoolSingapore 169857Singapore

Dear Editor,Previous studies had described the adaptation of enterovirus 71(EV-A71)strains that enabled entry and viral replication in Chinese Hamster Ovary(CHO)cell line(Zaini and McMinn 2012;Zaini et al.2012).these adapted strains derived from serial passage of a clinical isolate in CHO cells exhibited an amino acid substitution at VP2149,which enhanced viral replication by 100*1000-fold compared to the clinical *** VP2149 mutation was claimed responsible for adaptation to CHO-K1 cells without performing detailed molecular analyses to support these *** this study,we evaluate various VP1 and VP2 mutations in two CHO-adapted EV-A71 strains derived in our lab to assess their contribution to the phenotype of CHO cell adaptation.

关键词： adapted passage claimed