检索结果-南通市图书馆

Immobilization of activated sludge using improved polyvinyl alcohol (PVA) gel

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2007年第11期19卷 1293-1297页

作者： ZHANG Li-sheng WU Wei-zhong WANG jian-long Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 China College of Environmental Sciences Peking University Beijing 100871 China

The microbial immobilization method using polyvinyl alcohol （PVA） gel as an immobilizing material was improved and used for entrapment of activated sludge. The oxygen uptake rate （OUR） was used to characterize the biological activity of immobilized activated sludge. Three kinds of PVA-immobilized particles of activated sludge, that is, PVA-boric acid beads, PVA-sodium nitrate beads and PVA-orthophosphate beads were prepared, and their biological activity was compared by measuring the OUR value. The bioactivity of both autotrophic and heterotrophic microorganisms of activated sludge was determined using different synthetic wastewater media （containing 250 mg/L COD and 25 mg/L NH4^＋ -N）. The experimental results showed that the bioactivity and stability of the three kinds of immobilized activated sludge was greatly improved after activation. With respect of the bioactivity and the mechanical stability, the PVA-orthophosphate method may be a promising and economical technique for microbial immobilization.

关键词： immobilization biological activity oxygen uptake rate (OUR) polyvinyl alcohol (PVA)

Proteomic profiling of the hemolymph at the fifth instar of the silkworm Bombyx mori

在线全文

学校读者我要写书评

暂无评论

Insect Science 2012年第4期19卷 441-454页

作者： jian-Ying Li Ji-sheng Li Bo-Xiong zhong College of Animal Sciences Zhejiang UniversityHangzhouChina

Two-dimensional gel electrophoresis （2-DE） followed by matrix-assisted laser desorption ionization- time-of-flight/time-of-flight mass spectrometry （MS） analysis were used to charaterize the hemolymph proteomic profiles of the silkworm, Bombyx mori. At days 4 （V4） and 5 （VS） of the fifth （final） instar, when the larvae were at the fast-growing stage, we found dramatic changes in spots representing proteins having an approximate molecular weight （MW） of 30 kDa. Of these spots, four 30K proteins were highly up- regulated, implying a close association with the growth and development ofB. mori larvae. To understand the molecular basis and underlying mechanisms involved in development and metamorphosis, the proteome of whole hemolymph at V5 was analyzed using shotgun liquid chromatography tandem mass spectrometry with an LTQ-Orbitrap. A total of 108 proteins were identified without any false discovery hits. These proteins were involved in a variety of cellular functions, including metabolism, development, nutrient transport and reserve, and defense response. Gene ontology analysis showed that 3.4% of these proteins had nutrient reservoir activities and 5.7% were involved in the response to stimulus. Pathway analysis revealed that 22 proteins with common targets were involved in various cellular processes such as immunity, differentiation, proliferation and metamorphosis. These results suggested that some key factors such as the 30K proteins in hemolymph play important roles in B. mori growth and development. Moreover, the multiple functions of hemolymph may be operated by a complex biological network.

关键词： Bombyx mori gene ontology hemolymph LTQ-Orbitrap pathway,proteomics

NUMERICAL SOLUTIONS OF REYNOLDS AVERAGED NAVIER-STOKES EQUATIONS FOR 3-D TURBULENT FLOW OVER CONCAVE SURFACES OF DISCHARGING STRUCTURES

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2000年第4期12卷 120-126页

作者： Wei Wen-li Li jian-zhong Zhang Dong-sheng Xi′an University of Technology Xi′an 710048P.R.China

This paper is conserned with a numerical method for the solution of complete Reynolds averaged Navier Stokes equations for three dimensional flows over the concave surfaces of discharging structures. A non orthogonal body fitted coordinate system was used to deal with the complex physical geometry, and finite volume method (FVM) was employed to solve the convective transport equations for mean velocities and turbulence parameters (k, ε). It is indicated through the numerical example that the calculated results are in good agreement with the experimental ones, and it is also proved that this numerical method used to predict the characteristics of turbulent flow over the concave surfaces of discharging structures is feasible.

关键词： non-orthogonal body fitted coordinate system turbulent flow concave surface of discharging structure

Ceritinib增强ABCB1过表达白血病多药耐药的作用及机制研究

在线全文

学校读者我要写书评

暂无评论

中国现代药物应用 2021年第16期15卷 240-242页

作者：钟健生张金丽张星于晓阳佃林萍广州市红十字会医院血液科 510220

目的研究色瑞替尼(Ceritinib)增强ABCB1过表达白血病多药耐药的作用及机制。方法采集白血病骨髓样本,白血病细胞的分离、复苏及冻存,测定细胞毒性,然后建立裸鼠成瘤模型,检测Ceritinib联合阿霉素对小鼠肿瘤的抑制作用,阐明Ceritinib逆... 详细信息

目的研究色瑞替尼(Ceritinib)增强ABCB1过表达白血病多药耐药的作用及机制。方法采集白血病骨髓样本,白血病细胞的分离、复苏及冻存,测定细胞毒性,然后建立裸鼠成瘤模型,检测Ceritinib联合阿霉素对小鼠肿瘤的抑制作用,阐明Ceritinib逆转耐药。结果Ceritinib能够浓度依赖性降低K562/adr细胞阿霉素和紫杉醇的IC50值,即增加其对细胞的毒性作用,但是Ceritinib却未改变顺铂(不是ABCB1底物的)的细胞毒性。生理盐水组、Ceritinib组、阿霉素组裸鼠的肿瘤体积比较差异无统计学意义(P>0.05);Ceritinib联合阿霉素组的肿瘤体积小于生理盐水组、Ceritinib组、阿霉素组,差异有统计学意义(P<0.05);Ceritinib联合阿霉素组肿瘤平均重量(0.89±0.29)g低于生理盐水组的(2.32±0.31)g、Ceritinib组的(2.18±0.28)g和阿霉素组的(2.19±0.56)g,差异有统计学意义(P<0.05)。结论Ceritinib可以增强ABCB1过表达白血病细胞化疗药物的疗效,为新型多药耐药(MDR)调节剂的开发提供策略。

关键词：色瑞替尼 ABCB1 白血病耐药性

Siemens Definition AS128 CT维修5例

在线全文

学校读者我要写书评

暂无评论

医疗卫生装备 2023年第3期44卷 116-120页

作者：仲建生刘蕾闫瑾陈奇兵夏云成如皋市人民医院医学装备科江苏如皋226500 如皋博爱医院设备科江苏如皋226500

介绍了Siemens Definition AS128 CT的硬件构成,分析并总结了该设备在日常使用中出现的检查床水平移动后机架掉电、图像重建系统(image reconstruction system,IRS)计算机硬盘故障、开机时F1开关脱开、“Exam”按钮灰化等故障产生的原... 详细信息

介绍了Siemens Definition AS128 CT的硬件构成,分析并总结了该设备在日常使用中出现的检查床水平移动后机架掉电、图像重建系统(image reconstruction system,IRS)计算机硬盘故障、开机时F1开关脱开、“Exam”按钮灰化等故障产生的原因及维修思路,为临床工程技术人员排除相似故障提供了参考。

关键词： Siemens Definition AS128 CT 故障维修故障排除

在线全文

学校读者我要写书评

暂无评论

82例肾上腺出血的法医病理学分析

法医学杂志 2008年第4期24卷 273-274,292页

作者：程文婷易旭夫卢阶亮何钦飘钟建生廖志钢四川大学华西基础医学与法医学院四川成都610041 仁化县公安局广东韶关512300 江门市公安局新会分局广东江门529100 增城市公安局广东广州511340

目的分析肾上腺出血与个体死亡原因、年龄和性别的关系。方法对82例肾上腺出血的案例进行统计学分析。结果(1)肾上腺出血在猝死、感染、外伤和窒息中最多见。(2)肾上腺出血男性多于女性。猝死、外伤和中毒的肾上腺出血多见于青壮年,感... 详细信息

目的分析肾上腺出血与个体死亡原因、年龄和性别的关系。方法对82例肾上腺出血的案例进行统计学分析。结果(1)肾上腺出血在猝死、感染、外伤和窒息中最多见。(2)肾上腺出血男性多于女性。猝死、外伤和中毒的肾上腺出血多见于青壮年,感染以幼儿多见,窒息主要为胎儿和新生儿。(3)猝死和窒息的肾上腺出血部位主要在髓质,感染以皮质出血为主,外伤在包膜和髓质的出血概率相等。结论在法医检案过程中,肾上腺出血可以为寻找死因提供线索。

关键词：法医病理学猝死应激肾上腺出血

Thermal Expansion Coefficients of Thin Crystal Films

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2005年第5X期44卷 921-924页

作者： HUANG jian-Ping WU Xue-zhong LI sheng-Yi Mechatronics Engineering Institute National University of Defense Science and Technology Changsha 410073 China

The formulas for atomic displacements and Hamiltonian of a thin crystal film in phonon occupation number representation are obtained with the aid of Green's function theory. On the basis of these results, the formulas for thermal expansion coefficients of the thin crystal film are derived with the perturbation theory, and the numerical calculations are carried out. The results show that the thinner films have larger thermal expansion coefficients.

关键词： thermal expansion coefficients thin crystal film Green's function perturbation theory

Replica horizontal-shuffled iterative decoding of low-density parity-check codes

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2010年第6期17卷 32-40页

作者： YANG Yang HUANG jian-zhong TONG sheng WANG Xin-mei State Key Laboratory of Integrated Service Networks Xidian University Xi'an 710071 China Department of Electrical and Computer Engineering University of Connecticut Storrs CT 06269 USA

For practical considerations,it is essential to accelerate the convergence speed of the decoding algorithm used in an iterative decoding system. In this paper,replica versions of horizontal-shuffled decoding algorithms for low-density parity-check （LDPC） codes are proposed to improve the convergence speed of the original versions. The extrinsic information transfer （EXIT） chart technique is extended to the proposed algorithms to predict their convergence behavior. Both EXIT chart analysis and numerical results show that replica plain horizontal-shuffled （RPHS） decoding converges much faster than both plain horizontal-shuffled （PHS） decoding and the standard belief-propagation （BP） decoding. Furthermore,it is also revealed that replica group horizontal-shuffled （RGHS） decoding can increase the parallelism of RPHS decoding as well as preserve its high convergence speed if an equivalence condition is satisfied,and is thus suitable for hardware implementation.

关键词： replica shuffled decoding LDPC codes EXIT chart convergence speed

FrepJoin:an efficient partition-based algorithm for edit similarity join

在线全文

学校读者我要写书评

暂无评论

Frontiers of Information Technology & Electronic Engineering 2017年第10期18卷 1499-1510页

作者： Ji-zhou LUO sheng-fei SHI Hong-zhi WANG jian-zhong LI School of Computer Science and Technology Harbin Institute of Technology Guangdong Key Laboratory of Popular High Performance Computers Key Laboratory of Service Computing and Application

String similarity join(SSJ) is essential for many applications where near-duplicate objects need to be found. This paper targets SSJ with edit distance constraints. The existing algorithms usually adopt the filter-andrefine framework. They cannot catch the dissimilarity between string subsets, and do not fully exploit the statistics such as the frequencies of characters. We investigate to develop a partition-based algorithm by using such *** frequency vectors are used to partition datasets into data chunks with dissimilarity between them being caught easily. A novel algorithm is designed to accelerate SSJ via the partitioned data. A new filter is proposed to leverage the statistics to avoid computing edit distances for a noticeable proportion of candidate pairs which survive the existing filters. Our algorithm outperforms alternative methods notably on real datasets.

关键词： String similarity join Edit distance Filter and refine Data partition Combined frequency vectors