2008年《情报杂志》文献计量分析

运用文献计量学的方法,对2008年《情报杂志》载文、作者及引文情况进行统计分析,并将《情报杂志》与其他同类期刊近几年的有关统计数据对比,从中得出该刊的特点和发展规律,为其今后的发展提供参考数据。     

科技期刊作者自校的重要性

作者自校是指作者对其被录用的论文出版清样所做的自行校对活动，是科技期刊编辑出版疯程中的重要环节，是一种不可替代的校对形式．作者自校不但有助于编辑与作者间互助关系的形成，在一定程度上降低差错率，还能有效减少出版中的法律纠纷．     

绿色制造中的并行工程

对并行工程的内涵进行了进一步的探讨 ,指出并行工程的实质是产品生命周期的集成规划 这种产品生命周期的集成规划 ,赋予环境影响和资源因素的综合考虑 ,就构成了绿色制造的实质特征 然后 ,由此观点出发 ,探讨了绿色制造及其绿色设计中的并行工程问题 最后提出了一种绿色制造的并行工程运行模式 图 2 ,参 3     

岩石应力松弛试验及两类岩爆研究

对岩石峰值载荷后的松弛试验发现具有两类岩爆 :一类是本源型岩爆 ;另一类是激励型岩爆 两类岩爆概念的提出 ,是对现有认识的发展 应力松弛行为与岩爆的强弱程度具有内在联系 ,可以引入松弛系数R来描述岩爆冲击倾向 ,当R >1时无冲击倾向 ;当 0 .75≤R≤ 1时 ,有轻微冲击倾向 ;当R <0 .75时 ,有严重冲击倾向 图 4,表 2 ,参 4     

2000—2008年《天津城市建设学院学报》载文与作者统计分析

采用文献计量学的方法,对《天津城市建设学院学报》2000—2008年出版的36期总计695篇论文的内容、第一作者性别、年龄、职称、单位、地区等进行统计与分析,揭示了该刊载文内容特征和作者队伍状况,为读者、作者把握学科研究重点、研究方向以及学报进一步发展提供有益参考。     

Surface PEGylation of hollow mesoporous silica nanoparticles via aminated intermediate

A hybrid of organic/inorganic system, hollow mesoporous silica nanoparticles functionalized with poly(ethylene glycol), was synthesized in the presence of coupling agent and aminated ends. Doxorubicin (DOX) was used as a model drug to evaluate the effect of PEGylation on the loading capacity and release pattern of the system. Characterization with transmission electron microscopy (TEM) and scanning electron microscopy (SEM), X-ray diffraction (XRD), nitrogen adsorption-desorption, thermogravimetric analysis (TGA) and Fourier transformed infrared (FTIR) confirmed the PEG conjugation, as well as the amorphous mesoporous nature of the synthesized particles. Due to the capping effect of PEG molecules over the pores in the silica structure, the synthesized system was able to retain higher amount of cargo and establish a controlled manner when releasing.     

Microstructure and texture evolution of a near β titanium alloy Ti-7333 during continuous cooling hot deformation

The microstructure and texture evolution during continuous cooling hot deformation(CCHD) in a near β titanium alloy, named Ti-7Mo-3Nb-3Cr-3Al(Ti-7333), were investigated by using the electron backscattered diffraction(EBSD). The results indicate that the precipitation of secondary α phase was restricted by CCHD, and the morphology of primary α phase nearly had no change with the deformation and temperature drop. In contrast, βphase underwent more deformation and the grains tended to refine. This may be due to the dynamic recrystallization(DRX) of β phase, including continuous dynamic recrystallization(CDRX) and discontinuous dynamic recrystallization(DDRX). In addition, the textures of {110} 110 , {225} 520 and{115} 123 transformed to {100} 110 and {001} 100 during CCHD. Among these, the η-fiber component of {001} 100 was the dominant deformation texture in the deformed Ti-7333 alloy. Finally,continuous cooling has an important effect on the work hardening and softening during CCHD, contributing to the different flow behaviors at different cooling rates.     

Enhanced urease inhibition activity of Ag nanomaterials capped with N-substituted methyl 5-acetamido-β-resorcylate

Medically, bacterial ureases are important virulent factors and are used for treatment of peptic ulcers and urinary tones. Reported urease inhibitors are associated with various side effects including antibiotic resistance as a major one. Still there is an urgent need to synthesize new urease inhibitors. In this context we have synthesized new urease inhibitor i.e. AgL that is composed of Ag nanomaterials capped with N-substituted methyl 5-acetamido-β-resorcylate(L). The conjugation of L to silver was confirmed through FTIR, UV–vis and TEM analysis.Bare silver nanomaterials(Ag) were also prepared. The stability of AgL nanostructures was determined against various parameters(temperature, high salt concentration, pH) and found to be stable. The in vitro antimicrobial(antibacterial, antifungal), enzyme inhibition(xanthine oxidase, urease, carbonic anhydrase, α-chymotrypsin,cholinesterase) and antioxidant activities of AgL were investigated and compared with Ag, L and standard drugs.In comparison to other bioactivities, AgL shows statistically enhanced selective enzyme inhibition activity against urease enzyme. Urease inhibition activity of AgL was significantly greater than standard drug(thiourea),L and Ag. On a per weight basis, AgL required about 11–18 times less amount of L for inhibition of urease enzyme.     

十年来《三国演义》作者、成书与版本研究述要

20世纪《三国演义》作者、成书年代及版本问题的探讨一直是研究的热点之一,有各种分歧的认识、观点、说法等。进入21世纪以来,研究者对这些问题的关注仍不减以往,仅我国大陆出版发表的各种有关论著就达40多篇（部）,其中不乏新的见解与资料。对近10年来的有关研究予以述要,从中可以看出这些分歧在新世纪《三国演义》研究中的延续与演变。     

Controllable synthesis,XPS investigation and magnetic property of multiferroic BiMn_2O_5 system: The role of neodyme doping

In this work, a novel series of multiferroic materials BiMn_2O_5 doped by Neodyme has been prepared by a sol-gel method at low temperature. The crystallographic studies using X-ray diffraction and Rietveld Refinement techniques showed the formation of single-phase samples for all compositions, crystallizing in a mullite-type orthorhombic perovskite structure, space group Pbam(Z = 4). The SEM techniques confirmed the formation of single-phase materials with excellent mapping distribution. Raman and infrared spectroscopic measurements were performed and combined with lattice dynamics simulations to describe the room-temperature vibrational properties of all samples. The X-ray Photoelectron Spectroscopy(XPS) were measured in the energy range of 0–1400 eV at room temperature. The Fermi level E_F was defined with the accuracy of 0.127, 0.32 and 0.48 eV for BiMn_2O_5, Bi_(0.9)Nd_(0.1)Mn_2O_5 and Bi_(0.8)Nd_(0.2)Mn_2O_5 respectively. The X-ray photoelectron spectroscopy shows the existence of Mn~(4+) state. Magnetic measurements indicate Neél temperature T_N at 31, 40 and 61 K for BiMn_2O_5,Bi_(0.9)Nd_(0.1)Mn_2O_5 and Bi_(0.8)Nd_(0.2)Mn_2O_5 respectively.