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排序方式: 共有161条查询结果,搜索用时 15 毫秒
81.
A novel vic-dioxime, 1,2 dihydroxyimino-1-p-tolyl-3-aza-6-morpholine heptane (LH2) was prepared by reacting anti-p-tolylchloroglyoxime with 4-(3-aminopropyl)morpholine in absolute THF. Mononuclear complexes with a metal–ligand ratio of 1:2 were prepared using CoII, CuII and NiII salts. The ligand and its complexes were characterized by elemental analyses, FT-IR, u.v.–vis., 1H- and 13C-n.m.r. spectra, magnetic susceptibility measurements, thermogravimetric analyses (t.g.a.), and by cyclic voltammetry. 相似文献
82.
This study reports that quartz crystal microbalance (QCM) is used to determine the effect of chitosan derivatives obtained by chemical method on biofilm inhibition. Plasma grafted chitosan (pchito) was modified chemically with both 5-methyl-4-phenyl-thiophene-3-carboxylic acid (MFTKA) and 4-(thiophene-2-sulfonylamino)-benzoic acid (TSABA). The quartz crystal electrode surfaces were coated with nanofibers of these chitosan derivatives by QCM-electrospinning techniques. The surface morphology and elemental compositions of nanofibers were examined using Scanning electron microscopy-Energy dispersive X-ray spectroscopy (SEM-EDS). Inhibition of Pseudomonas aeruginosa PA01 as model bacteria on the electrodes coated with nanofiber was examined as a function of time using a flow-cell through QCM. 相似文献
83.
84.
一个解剖基人体下肢的生物动力模型--第三部分:肌肉效应 总被引:1,自引:0,他引:1
本将人体下肢的肌肉根据其解剖特征,分为5个肌群,并在由本第一部分所建立的基本的解剖基模型的基础上,计入其对人体下肢动力运动的效应。本所建立的5个肌群,则主要代表着膝关节处的运动和稳定肌。最后,作为应用,研究了一个献中的特例。 相似文献
85.
Hilal Goktas Xiaoxue Wang Asli Ugur Karen K. Gleason 《Macromolecular rapid communications》2015,36(13):1283-1289
The synthesis and characterization of poly(3,4‐ethylenedioxythiophene) (PEDOT) using water‐assisted vapor phase polymerization (VPP) and oxidative chemical vapor deposition (oCVD) are reported. For the VPP PEDOT, the oxidant, FeCl3, is sublimated onto the substrate from a heated crucible in the reactor chamber and subsequently exposed to 3,4‐ethylenedioxythiophene (EDOT) monomer and water vapor in the same reactor. The oCVD PEDOT was produced by introducing the oxidant, EDOT monomer, and water vapor simultaneously to the reactor. The enhancement of doping and crystallinity is observed in the water‐assisted oCVD thin films. The high doping level observed at UV–vis–NIR spectra for the oCVD PEDOT, suggests that water acts as a solubilizing agent for oxidant and its byproducts. Although the VPP produced PEDOT thin films are fully amorphous, their conductivities are comparable with that of the oCVD produced ones.
86.
Mehmet Gokhan Caglayan Hilal Torul Feyyaz Onur Ugur Tamer 《Journal of Raman spectroscopy : JRS》2015,46(9):802-806
In this paper, we proposed two sensitive surface‐enhanced Raman spectroscopy assays for the determination of modafinil in urine matrix. In the first assay, modafinil was extracted by solid phase extraction and determined after sandwiching with silver nanoparticles. In the second assay, modafinil was extracted by non‐specific interaction with magnetic gold nanoparticles and determined by sandwiching with magnetic gold and silver nanoparticles. The non‐specific magnetic extraction does not require any analyte specific agent like antibody, aptamer, or molecularly imprinted polymer, therefore, the cost and complexity of the assay is very low. Both assays are capable for application to urine samples with the detection limits under the minimum required performance limit of modafinil. The assays were validated in terms of accuracy, precision, detection limits, and ranges. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
87.
Nuray Ulusoy Öznur Ateş Ömer Küçükbasmacı Muammer Kiraz Yıldız Yeğenoğlu 《Monatshefte für Chemie / Chemical Monthly》2003,134(3):465-474
Summary. Some novel 4-[[2-[[5-(2-furanyl)-4-alkyl/aryl-4H-1,2,4-triazol-3-yl]thio]-acetyl/propionyl]-amino]-1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazoles were synthesized and evaluated for in vitro antibacterial activity against Staphylococcus aureus ATCC 29213, Pseudomonas aeruginosa ATCC 27853, Escherichia coli ATCC 25922, and Enterococcus faecalis ATCC 29212 and antifungal activity against Candida albicans ATCC 10231, Candida parapsilosis ATCC 22019, Candida krusei ATCC 6258, Candida parapsilosis, Trichophyton mentagrophytes var. erinacei NCPF 375, Microsporum gypseum NCPF 580, and Trichophyton rubrum using the microbroth dilution method. All of the compounds were found to be ineffective against the above bacteria within
the applied MIC ranges. On the other hand, they were effective against fungi to different degrees. Three compounds showed
high activity against C. parapsilosis and T. mentagrophytes var. erinacei NCPF 375 (MIC = 8 μg cm−3). The in vitro antimycobacterial activity of the new compounds was also investigated against Mycobacterium tuberculosis H37RV (ATCC 27294) in BACTEC 12B medium using a broth microdilution assay, the Microplate Alamar Blue Assay (MABA). Compounds
exhibiting fluorescence were tested in the BACTEC 460 radiometric system. The most active compound was found with 66% inhibition
at >6.25 μg cm−3.
Corresponding author. E-mail: nurayulusoy@yahoo.com
Received July 24, 2002; accepted August 26, 2002 相似文献
88.
Songul Akbulut Barbara Krupińska Anna Worobiec Ugur Cevik Halim Taskın Rene Van Grieken Lucyna Samek Ewa Wiłkojć 《Journal of Radioanalytical and Nuclear Chemistry》2013,295(2):1567-1573
PM-10, PM-2.5 and PM-1.0 concentrations were measured over an 8 h period at sites both inside and outside the museum of Wawel Royal Castle in Cracow, Poland. Gross alpha (α) and beta (β) activities seemed to vary across the particle size range with generally higher levels of activities in the PM-2.5 particle fraction, and higher activities in the PM-10 fraction, while both the highest and the lowest beta activities were found in PM-1.0 fraction. However, statistically there was no significant difference. The highly radioactive PM-1.0 fraction comprised mainly 210Pb and the 210Pb progeny, 210Bi and 210Po, and can be attributed to anthropogenic sourced outdoor radioactive particles brought indoors by visitors. 210Pb is considered to be a good tracer of secondary aerosols produced by gas-to-particle conversion. Inside the Museum, the highest level of gross alpha activity was detected in the PM-10 fraction, and was mainly due to the uranium isotopes (234U, 235U and 238U) and their daughter products (226Ra, 232Th, 210Po or 224Ra), and 137Cs. The minimum and maximum total indicative doses per 8 h are caused by 137Cs and 232Th, respectively. 相似文献
89.
Hadi Abou‐Chakra Pierre Chapelle Ugur Tüzün John Baxter Mayur Patel Mark Cross Ian Bridle MichaelS.A. Bradley 《Particle & Particle Systems Characterization》2004,21(1):39-46
The evaluation or design of a granular material handling process requires reliable data if executive decisions are to be made. Material behavior in a given process is usually investigated by collecting and analyzing material samples from different locations within the system. However, sampling can be a significant source of errors, as a poor sampling method can lead to measurements not truly representative of the real process. 相似文献
90.
Poly(methyl methacrylate-ran-perfluoroalkyl ethyl methacrylate) copolymers having varying perfluoroalkyl ethyl methacrylate ester (Zonyl-TM) contents were synthesized in supercritical CO2. Complete amorphous structures of the copolymers were verified by XRD. Young's modulus (Ymod) of the copolymers was decreased linearly from 1.57 to 1.08 GPa and Tg values from 102 to 77 °C with the increase of Zonyl-TM content. A linear relationship between the Ymod and the Tg values of the copolymer was also found. The increase of the large branched pendant groups resulted in the increase of the free volume and a corresponding decrease in Ymod and Tg of the copolymers. A good fit was found when the Schneider equation was used. Negative deviation from the Gordon-Taylor equation was observed when Zonyl-TM content was lower than 14% due to rapid increase in free volume and then a positive deviation was found due to the dipole-dipole interactions between the methyl ester and fluoroalkyl ester groups. 相似文献