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Conventional endoscopic retrograde cholangiopancreaticography vs the Olympus V-scope system

World Journal of Gastroenterology 2013年第12期19卷 1936-1942页

作者： Martin Raithel Andreas n.gel Jürgen Maiss dane Wildner Alexander Fritzkarl Hagel sandra Braun Hiwot diebel Eckhart Georg Hahn department of Medicine 1 GastroenterologyEndoscopy University Erlangen-Nuremberg

AIM: To compare the new Olympus V-scope (Vs) to conventional endoscopic retrograde cholangiopancreati-cography (ERCP). METHOds: Forty-nine patients with previous endoscopic papillotomy who were admitted for interventional ERCP for one of several reasons were included in this single-centre, prospective randomized study. Consecutive patients were randomized to either the Vs group or to the conventional ERCP group. ERCP-nave patients who had not undergone papillotomy were excluded. The main study parameters were interventional examination time, X-ray time and dose, and premedication dose (all given below as the median, range) and were investigated in addition to each patient's clinical outcome and complications. subjective scores to assess each procedure were also provided by the physicians and endoscopy assistants who carried out the procedures. A statistical analysis was carried out using the Wilcoxon rank-sum ***: Twenty-five patients with 50 interventions were examined with the Vs ERCP technique, and 24 patients with 47 interventions were examined using the conventional ERCP technique. There were no significant differences between the two groups regarding the age, sex, indications, degree of ERCP difficulty, or interventions performed. The main study parameters in the Vs group showed a nonsignificant trend towards a shorter interventional examination time (29 min, 5-50 min vs 31 min, 7-90 min, P = 0.28), shorter X-ray time (5.8 min, 0.6-14.1 min vs 6.1 min, 1.6-18.8 min, P = 0.48), and lower X-ray dose (1351 cGy/m2 , 159-5039 cGy/m2 vs 1296 cGy/m2 , 202.2-6421 cGy/m 2 , P = 0.34). A nonsignificant trend towards fewer adverse events occurred in the Vs group as compared with the conventional ERCP group (cholangitis: 12% vs 16%, P = 0.12; pain: 4% vs 12.5%, P = 0.33; post-ERCP pancreatitis: 4% vs 12.5%, P = 0.14). In addition, there were no statistically significant differences in assessment by the physicians and endoscopy assistants using subjective questio

关键词： Endoscopic retrograde cholangiopancre-aticography short guidewire endoscopic retrograde cholangiopancreaticography system X-ray protection V-scope Bile duct stenosis

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synthesis, Molecular structure and Anti-Onchocercal studies of 1-(Phthalazin-1(2H)-one)[(Pyridin-2-yl)ethylidene]hydrazone

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International Journal of Organic Chemistry 2016年第1期6卷 77-84页

作者： Joseph n. Yong Felicite Majoumo-mbe Moses samje Emmanuel n. nfor department of Chemistry University of Buea Buea Cameroon department of Biomedical sciences University of Bamenda Bambili Cameroon

The novel ligand, 1-(phthalazin-1(2H)-one)[(pyridin-2-yl)ethylidene]hydrazone,(APn), derived from the antihypertensive drug, hydralazine hydrochloride, was synthesized and characterized by spectroscopic methods (IR, 1H nMR). The X-ray crystallographic data indicates that APn has an exocyclic C=n bond on the hydralazine moiety. APn revealed significant anti-onchocercal activity with IC50 values of 0.3125 μg/mL on microfilaria and 10 μg/mL on adult worms compared to the standard drug, ivermectin.

关键词： Hydralazine Hydrochloride schiff Bases Anti-Onchocercal Activity

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Advanced endoscopic imaging to improve adenoma detection

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World Journal of Gastrointestinal Endoscopy 2015年第3期7卷 224-229页

作者： Helmut neumann Andreas n.gel Andrea Buda department of Medicine I University of Erlangen-Nuremberg department of surgical Gastroenterological and Oncological Sciences University of Padova Gastroenterology Unit Department of Oncological Gastrointestinal Surgery S. Maria del Prato Hospital

Advanced endoscopic imaging is revolutionizing our way on how to diagnose and treat colorectal lesions. Within recent years a variety of modern endoscopic imaging techniques was introduced to improve adenoma detection rates. Those include high-definition imaging, dye-less chromoendoscopy techniques and novel, highly flexible endoscopes, some of themequipped with balloons or multiple lenses in order to improve adenoma detection rates. In this review we will focus on the newest developments in the field of colonoscopic imaging to improve adenoma detection rates. described techniques include high-definition imaging, optical chromoendoscopy techniques, virtual chromoendoscopy techniques, the Third Eye Retroscope and other retroviewing devices, the G-EYE endoscope and the Full spectrum Endoscopy-system.

关键词： Advanced endoscopic imaging G-Eye Full spectrum Endoscopy-system Chromoendoscopy I-scan narrow band imaging Fujinon Intelligent ColorEnhancement 3rd Eye Polyps Colorectal cancer

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FELUWA Hose diaphragm Piston Pumps for Abrasive,Aggressive ＆ Toxic Media and Coal Gasificaiton

FELUWA Hose Diaphragm Piston Pumps for Abrasive,Aggressive ...

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第六届化学工程与生物技术展览暨会议

作者： HeinzM.n.gel FELUWA Pumpen GmbH Beulertweg D-54570 Murlenbach

＜正＞ safety, availability （MTBF, MTBR） and reliability are decisive criteria for the choice ofthe optimum *** trends within the pumps’ industry are at present coming down to cost reduction as a ***, strategies to...

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size effects on electrical properties of sol–gel grown chromium doped zinc oxide nanoparticles

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Journal of Materials science & Technology 2018年第3期34卷 488-495页

作者： Zalak Joshi davit dhruv K.n.Rathod J.H.Markna A.satyaprasad A.d.Joshi P.s.solanki n.A.shah department of Physics Saurashtra University department of nanotechnology V.V.P.Engineering College FCIPT Institute for Plasma Research department of nanoscience and Advanced Materials Saurashtra University

In this communication, we report the results of the studies on electrical properties of Zn0.95Cr0.05O nanoparticles synthesized using sol-gel method. X-ray diffraction （XRd） and transmission electron microscopy （TEM） measurements were performed for the structural and microstructural behaviors of the nanoparticles. Rietveld analysis was carried out to confirm the single phasic nature. High resolution TEM （HRTEM） confirms the nanoscale nature and polycrystalline orientations in the samples. dielectric response has been understood in the context of universal dielectric response （UdR） model along with the Koop＇s theory and Maxwell - Wagner （M-W） mechanism. Variation in ac conductivity with frequency has been discussed in detail in terms of power law fits. Results of the impedance measurements have been explained on the basis of crystal cores and crystal boundary density. Cole - cole behavior has been studied for the impedance data. For potential application of nanoparticles, average normalized change （AnC） in impedance has been estimated and discussed in the light of size effects and oxygen vacancies.

关键词： size effects Electrical properties sol-gelZinc oxide nanoparticles

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synthesis and characterization of CnT/Ce-TiO_2 nanocomposite for phenol degradation

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Journal of Rare Earths 2012年第7期30卷 651-658页

作者： shaari n Tan s H Mohamed A R school of Chemical Engineering Engineering Campus University Sains Malaysia

An innovative photocatalyst, Carbon nanotube （CnT） supported Ce-TiO2 nanocomposite was successfully synthesized via modi-fied sol gel method and investigated in a batch reactor for abolition of phenol under UV light spectrum. Characterization of catalyst micro-structure and internal properties were done by means of X-ray diffraction （XRd）, Brunauer-Emmett-Teller （BET）, scanning electron micros-copy （sEM）, transmission electron microscopy （TEM） and UV-vis diffuse reflectance spectra （dRs）. Ce doping can inhibit phase transfor-mation from anatase to rutile and eliminate the recombination of electron-hole pairs in the catalyst. The presence of CnT in TiO2 composite can both increase the photoactivity under UV and change surface properties to achieve sensitivity to visible light. The optimum mass ratio of CnT support and cerium （Ce） dopant in TiO2 was the prominent factor to harvest CnT/Ce-TiO2 photocatalyst nanocomposite. The results demonstrated that optimum mass ratio of CnT：TiO2：Ce was 0.02：1.0：0.06, which resulted in the great performance of the photocatalyst to de-grade about 94% of phenol in a 50 mg/L solution in only 3 h. In this paper, dissimilar role of CnT support and Ce dopant in the TiO2 photo-catalysis of phenol was also discussed.

关键词： carbon nanotube (CnT) cerium TiO2 nanocomposite photocatalyst phenol rare earths

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structural and photoluminescence properties of La3+ doped CdO nanophosphors synthesised via green mediated solution combustion route

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Journal of Rare Earths 2019年第9期37卷 916-923,I0001页

作者： M.s. Geetha H.n. shivananjaiah Vijaya Composite College Bangalore560 003India Government science College Nrupatunga RoadBangalore 560 001India

This paper reports a facile environmentally safe green combustion synthesis method of La3+doped CdO nanoparticles(nPs)using different concentrations of Aloe vera(A.V)gel as combustible *** crystallite size obtained using PXRd pattern is found to be 12-22 *** structural analysis was further analysed by Rietveld refinement *** X-ray photoelectron spectroscopy(XPs)analysis reveals the presence of two electronic states of CdO around 400 and 411 eV attributed to Cd 3 d3/2 and 3 d3/2,*** photoluminescence(PL)studies were carried upon 350 nm excitation *** PL emission spectra are found to have two prominent peaks centered at 410 and 510 nm and are attributed to 5d3→7F1 and 5d1→7F0 transitions,*** Commission International de l’Eclairage(CIE)chromaticity diagram reveals blue-green color *** correlation color temperature(CCT)value is found to be around^9793 *** obtained results suggest that the product is quite useful for cool light emitting diode applications when doping concentration is 2 mol%.

关键词： Green synthesis nanostructures Photoluminescence Judd-ofelt Rare earths CdO

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Influence of the Cd/s Molar Ratio on the Optical and structural Properties of nanocrystalline Cds Thin Films

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Journal of Materials science & Technology 2010年第3期26卷 193-199页

作者： M.Thambidurai n.Murugan n.Muthukumarasamy s.Agilan s.Vasantha R.Balasundaraprabhu3 department of Physics Coimbatore Institute of Technology department of Mechanical Engineering Coimbatore Institute of Technology department of Physics PSG College of Technology

nanocrystalline Cds thin films have been deposited using precursors with different thiourea concentrationonto glass substrates by sol-gel spin coating *** crystalline nature of the films has been observedto be strongly dependent on thiourea concentration and annealing *** Cds films are found tobe nanocrystalline in nature with hexagonal *** grain size is found to be in the range of 7.6 to11.5 nm depending on the thiourea concentration and annealing *** high resolution transmissionelectron microscopy （HRTEM） results of the Cds films prepared using cadmium to thiourea molar ratio of0.3：0.3 indicate the formation of nanocrystalline Cds with grain size of 5 *** transform infrared （FTIR）analysis shows the absorption bands corresponding to Cd and *** optical study carried out to determinethe band gap of the nanostructured Cds thin films shows a strong blue *** band gap energy has beenobserved to lie in the range of 3.97 to 3.62 eV following closely the quantum confinement dependence ofenergy on crystallite *** dependence of band gap of the Cds films on the annealing temperature andthiourea concentration has also been *** photoluminescence （PL） spectra display two main emissionpeaks corresponding to the blue and green emissions of Cds.

关键词： sol-gel Cds quantum dots High resolution transmission electronmicroscopy (HRTEM)

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Electronic and optical properties of TiO_2 and its polymorphs by Z-scan method

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Chinese Physics B 2014年第8期23卷 340-344页

作者： s. divya V P n nampoori P Radhakrishnan A Mujeeb International school of Photonics Cochin University of Science and Technology

TiO2 is a material which has attracted considerable attention from the scientific community for its innumerable prop- erties. TiO2 is known to exist in nature in three different crystalline structures： rutile, anatase, and brookite. Anatase and rutile TiO2 films have been widely characterized for their potential applications in solar cells, self-cleaning coatings, and photocatalysis. In the present report, the third-order nonlinear susceptibilities of TiO2 and its polymorphs, anatase, and rutile, prepared by the sol-gel technique followed by heat treatment are investigated using the Z-scan technique at a wavelength of 532 nm with a duration of 7 ns. Imaginary and real values of Z（3） for amorphous, anatase, and rutile are also calculated and found to be 5 × 10^-19 m2/V2, 27 × 10^-19 m2/V2, 19 × 10^-19 m2/V2, respectively. It is found that the values of the optical constants of amorphous TiO2 after heat treatment vary considerably. It is assumed that this could be due to the variation in the electronic structure of TiO2 synchronous with the formation of its polymorphs, anatase, and rutile. Amorphous TiO2 is marked by the localization of the tail states near the band gap, whereas its crystalline counterparts are characterized by completely delocalized tail states.

关键词： excitons reverse saturable absorption (RsA) excitonic nonlinearity

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Green mediated synthesis of lanthanum doped zinc oxide:study of its structural,optical and latent fingerprint application

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Journal of Rare Earths 2020年第12期38卷 1281-1287页

作者： H.n.shivananjaiah K.sailaja Kumari M.s.Geetha Government science College Nrupatunga RoadBangalore560001India Base Educational services BasavanagudiBangalore560004India

The present paper summarises the synthesis of La3+doped zinc oxide nanoparticles using Aloe vera gel by solution combustion method and the characterization using a powder X-ray diffractometer(PXRd),a transmission electron microscope(TEM),an X-ray photometric spectrometer(XPs),a Raman spectrometer and their applications in optical devices and latent *** pattern confirms the crystallite size of La3+doped ZnO varies from 13 to 20 *** size varies inversely with doping *** properties are found to be the maximum for 2 mol% doping *** spectra extends the use of ZnO:La3+nanoparticles in blue green *** nanoparticles also have superior property as a fluorescent labels in fingerprints.

关键词： Green synthesis nanostructures Photoluminescence Latent fingerprinting Rare earths

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