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Long-term results of endoscopic balloon dilatation of lower gastrointestinal tract strictures in Crohn's disease:A prospective study

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World Journal of Gastroenterology 2009年第21期15卷 2623-2627页

作者： Klaus Stienecker Daniel Gleichmann Ulrike Neumayer h joachim glaser Carolin Tonus Department of Gastroenterology Herz-Jesu-Hospital Fulda Department of Visceral Surgery Herz-Jesu-Hospital Fulda

AIM:To examine the long-term results of endoscopic treatment in a prospective study conducted over a period of 10 years,1997 to January ***:A total of 25 patients(20 female and five male:aged 18-75 years),with at least one symptom of stricture not passable with the standard colonoscope and with a confirmed scarred Crohn's stricture of the lower gastrointestinal tract,were included in the *** main symptom was abdominal *** endoscopic balloon dilatation was performed with an 18 mm balloon under endoscopic and radiological ***:Eleven strictures were located in the colon,13 at the anastomosis after ileocecal resection,three at the Bauhin valve and four in the *** patients had two strictures and one patient had three *** the 31 strictures,in 30 was balloon dilatation successful in a single endoscopic session,so that eventually the strictures could be passed easily with the standard *** one patient with a long stricture of the ileum involving the Bauhin valve and an additional stricture of the ileum which were 15 cm apart,sufficient dilatation was not *** patient therefore required *** of abdominal symptoms was achieved in all cases which had technically successful balloon dilatation,althoughin one case perforation occurred after dilatation of a recurrent *** follow-up was in the range of 54-118 mo(mean of 81 mo).The relapse rate over this period was 46%,but 64% of relapsing strictures could be successfully dilated *** in four patients was surgery required during this follow-up ***:We conclude from these initial results that endoscopic balloon dilatation,especially for short strictures in Crohn's disease,can be performed with reliable *** is a rare *** is our opinion that in the long-term,the relapse rate is probably higher than after surgery,but usually a second endoscopic treatment can be performed successfully,leading to

关键词： Crohn's disease strictures Balloon dilatation Endoscopy Morbidity Mortality

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Tree water potentials supporting an explanation for the occurrence of Vachellia erioloba in the Namib Desert (Namibia)

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Forest Ecosystems 2017年第4期4卷 303-312页

作者： joachim h. A. Krug Institute for Silviculture and Forest Ecology Georg-August-University of Gottingen Bosgenweg 1 37077 Gottingen Germany

Background： Site-vegetation relations of Vachellia erioloba, Faidherbia albido, Euclea pseudebenus and Tamarix usneoides in two contrasting locations in the Namib Desert （Namibia） were evaluated with the goal to relate soil water availability to the occurrence of trees under hyper-arid conditions, Methods： Plant water potentials were measured using a pressure chamber in the field. Pre-dawn water potentials were assessed to reflect the soil water potential of the rhizosphere. Midday water potentials were measured to assess the strongest negative water potential applied by the sample trees. Results： Pre-dawn water potentials and midday water potentials indicated access to soil water in the rhizosphere and by this, provide an explanation for an occurrence of V. erioloba within the extreme environmental conditions of sand dunes in the Namib Desert. Diurnal ranges seem to reflect more and less suitable stands, in terms of soil water availability, within the sampling sites. While the impact of the ephemeral Kuiseb river on soil water availability was assessed through the four species＇ plant-internal water relations, comparable pre-dawn water potentials of V. erioioba at both sites indicate soil water availability also in the dunes of Namibrand. The extreme midday water potentials of the dune plants possibly show the upper limit of tolerance for V. eriolobo. Conclusions： The preliminary data provide an explanation of the occurrence and distribution of the investigated species in beds of ephemeral rivers and on dunes under the hyper-arid climatic conditions of the Namib Desert and qualify suitability within the assessed sites. Understanding the plant-physiological processes and assessing the plant-internal water potential provides a valuable tool to evaluate soil water availability within the rhizosphere and to describe an adaptation potential of investigated species. The comparability of pre-dawn water potentials at both sites indicates unexpected soil water availability w

关键词： Water potential Arid land Soil water availability Namibia V. erioloba

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A Population Balance Model for Disperse Systems:Particle Size Distribution in Suspension Polymerization

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Chinese Journal of Chemical Engineering 1999年第4期7卷 332-344页

作者：陈中 Werner Pauer h.-U.Moritz Jan Prss hans-joachim Warnecke Chemical Engineering University of PaderbornPaderborn 33098Germany

On the basis of population balance a mathematical model is developed to describe the formation of polymer particle in styrene suspension polymerization. The characteristics of coalescence and breakage of droplets and the gel effect are analyzed in particular. Parameters of the models are estimated by experimental data on reaction conversion and particle size distribution. The results show that the model is suitable for predicting polymerization processes.

关键词： population balance model styrene suspension polymerization particle size distribution

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Liver Fat Scores for Noninvasive Diagnosis and Monitoring of Nonalcoholic Fatty Liver Disease in Epidemiological and Clinical Studies

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Journal of Clinical and Translational hepatology 2023年第5期11卷 1212-1227页

作者： Mona Reinshagen Stefan Kabisch Andreas F.h.Pfeiffer joachim Spranger Department of Endocrinology and Metabolism Campus Benjamin FranklinCharitéUniversity MedicineBerlinGermany Deutsches Zentrum für Diabetesforschung e.V. Geschäftsstelle am Helmholtz-Zentrum MünchenNeuherbergGermany

Nonalcoholic fatty liver disease(NAFLD)is strongly associated with the metabolic syndrome and type 2 diabetes and independently contributes to long-term *** often asymptomatic but reversible,it would require population-wide screening,but direct diagnostics are either too invasive(liver biopsy),costly(MRI)or depending on the examiner’s expertise(ultrasonography).hepatosteatosis is usually accommodated by features of the metabolic syndrome(***,disturbances in triglyceride and glucose metabolism),and signs of hepatocellular damage,all of which are reflected by biomarkers,which poorly predict NAFLD as single item,but provide a cheap diagnostic alternative when integrated into composite liver fat *** liver index,NAFLD LFS,and hepatic steatosis index are common and accurate indices for NAFLD prediction,but show limited accuracy for liver fat *** indices are rarely *** fibrosis scores are commonly used in clinical practice,but their mandatory reflection of fibrotic reorganization,hepatic injury or systemic sequelae reduces sensitivity for the diagnosis of simple ***-induced liver fat changes are poorly reflected by liver fat indices,depending on the intervention and its specific impact of weight loss on *** limited validity in longitudinal settings stimulates research for new ***,hepatokines,markers of cellular integrity,genetic variants but also simple and inexpensive routine parameters might be potential ***,liver fat indices lack precision for NAFLD prediction or monitoring in individual patients,but in large cohorts they may substitute nonexistent imaging data and serve as a compound biomarker of metabolic syndrome and its cardiometabolic sequelae.

关键词： NAFLD Liver fat indices Fatty liver index Prediction Dietary intervention

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Paraesophageal hernia and iron deficiency anemia:Mechanisms,diagnostics and therapy

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World Journal of Gastrointestinal Surgery 2021年第3期13卷 222-230页

作者： Christoph G Dietrich Dolores hübner joachim W heise Department of Internal Medicine Bethlehem Center of HealthStolberg D-52222Germany Department of Radiology Bethlehem Center of HealthStolberg D-52222Germany Department of General and Abdominal Surgery Bethlehem Health CenterStolberg D-52222Germany

There is ample clinical evidence suggesting that the presence of large axial or paraesophageal hernias may lead to iron deficiency ***-called Cameron lesions,as well as other small mucosa erosions,in the sliding area of these diaphragmatic hernias lead to invisible chronic blood loss and consequently to iron *** the spectrum of symptoms in these patients is large,anemia is often not the only indication and typically not the primary indication for surgical correction of diaphragmatic *** treatment with proton pump inhibitors and iron substitution can alleviate anemia,but this is not always *** exclude other possible bleeding sources in the gastrointestinal tract,a comprehensive diagnostic program is necessary and reviewed in this ***,we discuss controversies in the surgical management of paraesophageal hernias.

关键词： Iron deficiency anemia Paraesophageal hernia Upside-down stomach Cameron lesions

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Microwave-assisted combustion to produce benzene polycarboxylic acids as molecular markers for biochar identification and quantification

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Biochar 2021年第4期3卷 407-418页

作者： Bruno glaser Marie Guenther heike Maennicke Tobias Bromm Institute of Agricultural and Nutritional Sciences Soil BiogeochemistryMartin Luther University Halle-Wittenbergvon-Seckendorff-Platz 306120 HalleGermany

Biochar is a promising carbon dioxide removal(CDR)technology for climate change *** procedures for its determination are lengthy,labor-intensive,and difficult to *** polycarboxylic acids(BPCA)are the most promising molecular markers for identification and quantification of biochar and its quality as they specifically represent the stable polyaromatic backbone of ***,using the BPCA method,its stability and,thus,its C sequestration potential could be used for CDR *** current BPCA method relies on a specific high-pressure digestion apparatus,which is not available around the ***,the aims of the present work were(i)to compare the conventional high-pressure nitric acid oxidation with a microwave-assisted digestion technique and optimize the oxidation conditions in such a way that previous results are comparable with future ones,and(ii)to significantly reduce the digestion time of soil samples of 8 h and to develop a suitable routine method that produces comparable and reproducible *** this purpose,soil and control sample series were prepared for different *** results were compared with the values of the conventional method both for individual samples and for the whole dataset *** ensure the representative-ness of the results,in addition to various soil samples with different properties,we included two reference materials into our data set,one without biochar(wheat flour)and a biochar *** results showed that conventional nitric acid oxidation in the BPCA determination at 170°C and 8 h can be substituted by digestion in a microwave reaction system(CEM Mars6)at 190°C and 1 *** results further showed that this condition needs to be strictly matched,because,otherwise,over-or underestimation of biochar quantity and/or quality will be the *** goal of a less time-consuming BPCA extrac-tion from soil samples was achieved by reducing the extraction t

关键词： Biochar Black carbon Pyrogenic carbon Analysis Molecular marker Microwave-assisted combustion

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CONTINUITY PROPERTIES FOR BORN-JORDAN OPERATORS WITh SYMBOLS IN hÖRMANDER CLASSES AND MODULATION SPACES

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Acta Mathematica Scientia 2020年第6期40卷 1603-1626页

作者： Maurice de GOSSON joachim TOFT Faculty of Mathematics NuHAGUniversity of ViennaViennaAustria Department of Mathematics Linnæus UniversityVäxjöSweden

We show that the Weyl symbol of a Born-Jordan operator is in the same class as the Born-Jordan symbol,when hörmander symbols and certain types of modulation spaces are used as symbol *** use these properties to carry ... 详细信息

关键词： quantization Schatten-von Neumann Feffermann-Phong's inequality

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Stability of Ni/SiO2-ZrO2 catalysts towards steaming and coking in the dry reforming of methane with carbon dioxide

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Frontiers of Chemical Science and Engineering 2016年第2期10卷 281-293页

作者： Bettina Stolze Juliane Titus Stephan A. Schunk Andrian Milano Ekkehard Schwab Roger glaser Institute of Chemical Technology Universitat Leipzig Lirmestr. 3 04103 Leipzig Germany hte Gmbh Kurpfalzring 104 69123 Heidelberg Germany BASF SE Carl-Bosch-Straβe 38 67056 Ludwigshafen Germany

Ni/SiO2-ZrO2 catalysts with Ni loadings of 1 to 13 wt-% were prepared, characterized by elemental analysis, X-ray diffraction, N2 sorption, temperature programmed oxidation, temperature programmed reduc- tion, and tested for their activity and stability in the dry reforming of methane with carbon dioxide at 850 ℃, gas hourly space velocity of 6000 and 1800 h^-1 and atmo- spheric pressure. The SiO2-ZrO2 support as obtained through a simple and efficient sol-gel synthesis is highly porous （ABET = 90 m^·g^-1, dp= 4.4 nm） with a homogeneously distributed Si-content of 3 wt-%. No loss of Si or formation ofmonoclinic ZrO2, even after steaming at 850 ℃ for 160 h, was detectable. The catalyst with 5 wt-% Ni loading in its fully reduced state is stable over 15 h on-stream in the dry reforming reaction. If the catalyst was not fully reduced, a reduction during the early stages of dry reforming is accompanied by the deposition of up to 44 mg· g^-1 carbon as shown by experiments in a magnetic suspension balance. Rapid coking occurs for increased residence times and times-on-stream starting at 50 h. The Ni loading of 5 wt-% on SiO2-ZrO2 was shown to provide an optimal balance between activity and coking tendency.

关键词： Ni/SiO2-ZrO2 synthesis gas dry reforming,coking steaming

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STCF conceptual design report (Volume 1): Physics & detector

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Frontiers of physics 2024年第1期19卷 1-154页

作者： M.Achasov X.C.Ai L.P.An R.Aliberti Q.An X.Z.Bai Y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomyagkov A.Bondar I.Boyko Z.h.Bu F.M.Cai h.Cai J.J.Cao Q.h.Cao X.Cao Z.Cao Q.Chang K.T.Chao D.Y.Chen h.Chen h.X.Chen J.F.Chen K.Chen L.L.Chen P.Chen S.L.Chen S.M.Chen S.Chen S.P.Chen W.Chen X.Chen X.F.Chen X.R.Chen Y.Chen Y.Q.Chen h.Y.Cheng J.Cheng S.Cheng T.G.Cheng J.P.Dai L.Y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenko J.M.Dias D.Z.Ding L.Y.Dong W.h.Dong V.Druzhinin D.S.Du Y.J.Du Z.G.Du L.M.Duan D.Epifanov Y.L.Fan S.S.Fang Z.J.Fang G.Fedotovich C.Q.Feng X.Feng Y.T.Feng J.L.Fu J.Gao Y.N.Gao P.S.Ge C.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl J.L.Gu A.Guevara L.C.Gui A.Q.Guo F.K.Guo J.C.Guo J.Guo Y.P.Guo Z.h.Guo A.Guskov K.L.han L.han M.han X.Q.hao J.B.he S.Q.he X.G.he Y.L.he Z.B.he Z.X.heng B.L.hou T.J.hou Y.R.hou C.Y.hu h.M.hu K.hu R.J.hu W.h.hu X.h.hu Y.C.hu J.hua G.S.huang J.S.huang M.huang Q.Y.huang W.Q.huang X.T.huang X.J.huang Y.B.huang Y.S.huang N.hüsken V.Ivanov Q.P.Ji J.J.Jia S.Jia Z.K.Jia h.B.Jiang J.Jiang S.Z.Jiang J.B.Jiao Z.Jiao h.J.Jing X.L.Kang X.S.Kang B.C.Ke M.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin Y.Lei E.Levichev C.h.Li C.Li D.Y.Li F.Li G.Li G.Li h.B.Li h.Li h.N.Li h.J.Li h.L.Li J.M.Li J.Li L.Li L.Li L.Y.Li N.Li P.R.Li R.h.Li S.Li T.Li W.J.Li X.Li X.h.Li X.Q.Li X.h.Li Y.Li Y.Y.Li Z.J.Li h.Liang J.h.Liang Y.T.Liang G.R.Liao L.Z.Liao Y.Liao C.X.Lin D.X.Lin X.S.Lin B.J.Liu C.W.Liu D.Liu F.Liu G.M.Liu h.B.Liu J.Liu J.J.Liu J.B.Liu K.Liu K.Y.Liu K.Liu L.Liu Q.Liu S.B.Liu T.Liu X.Liu Y.W.Liu Y.Liu Y.L.Liu Z.Q.Liu Z.Y.Liu Z.W.Liu I.Logashenko Y.Long C.G.Lu J.X.Lu N.Lu Q.F.Lü Y.Lu Y.Lu Z.Lu P.Lukin F.J.Luo T.Luo X.F.Luo Y.h.Luo h.J.Lyu X.R.Lyu J.P.Ma P.Ma Y.Ma Y.M.Ma F.Maas S.Malde D.Matvienko Z.X.Meng R.Mitchell A.Nefediev Y.Nefedov S.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova X.Pan Y.Pan E.Passemar Y.P.Pei h.P.Peng L.Peng X.Y.Peng X.J.Peng K.Peters S.Pivovarov E.Pyata B.B.Qi Y.Q.Qi W.B.Qian Y.Qian C.F.Qiao J.J.Qin J.J.Qin L.Q.Qin X.S.Qin T.L.Qiu J.Rademacker C.F.Redmer h.Y.Sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budker Institute of Nuclear Physics Novosibirsk 630090Russia CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Normal University Wuhan 430079China Central South University Changsha 410083China China University of Geosciences Wuhan 430074China China University of Mining and Technology Xuzhou 221116China École Polytechnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goethe University Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China hangzhou Institute for Advanced Study UCASHangzhou 310024China hebei Normal University Shijiazhuang 050024China hebei University Baoding 071002China hefei University of Technology Hefei 230601China helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany henan Normal University Xinxiang 453007China henan University Kaifeng 475004China high Energy Physics Center Chung-Ang UniversitySeoul 06974Korea higher School of Economy 11 Pokrovsky Bulvar Moscow 109028Russia huangshan University Huangshan 245000China hubei University of Automotive Technology Shiyan 442002China hunan Normal University Changsha 410081China hunan University of Science and Technology Xiangtan 411201China hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of Advanced Science Facilities Shenzhen 518107China Institute of high Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Jilin University Changch

The superτ-charm facility(STCF)is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** STCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the BEPCII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the Standard *** STCF project in China is under development with an extensive R&D *** document presents the physics opportunities at the STCF,describes conceptual designs of the STCF detector system,and discusses future plans for detector R&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STCF detector conceptual design

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Management of functional dyspepsia: Unsolved problems and new perspectives

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World Journal of Gastroenterology 2005年第42期11卷 6577-6581页

作者： Ahmed Madisch Stephan Miehlke joachim Labenz Medical Department Ⅰ Technical University hospital Dresden Germany Medical Department Ev. Jung-Stilling-hospital Academic Teaching Hospital of the University of Bonn Siegen Germany

The common characteristic criteria of all functional gastrointestinal(GI)disorders are the persistence and recurrence of variable gastrointestinal symptoms that cannot be explained by any structural or biochemical abnormalities. Functional dyspepsia (FD) represents one of the important GI disorders in Western countries because of its remarkably high prevalence in general population and its impact on quality of life. Due to its dependence on both subjective determinants and diverse country-specific circumstances, the definition and management strategies of FD are still variably *** trials with several drug classes (e.g., proton pump inhibitors, h2-blockers, prokinetic drugs) have been performed frequently without validated diseasespecific test instruments for the outcome ***, the interpretation of such trials remains difficult and controversial with respect to comparability and evaluation of drug efficacy, and definite conclusions can be drawn neither for diagnostic management nor for efficacious drug therapy so far. In view of these unsolved problems, guidelines both on the clinical management of FD and on the performance of clinical trials are needed. In recent years, increasing research work has been done in this area. Clinical trials conducted in adequately diagnosed patients that provided validated outcome measurements may result in better insights leading to more effective treatment *** perspectives have been recently performed by methodologically well-designed treatment studies with herbal drug preparations. herbal drugs, given their proven efficacy in clinical trials, offer a safe therapeutic alternative in the treatment of FD which is often favored by both patients and physicians. A fixed combination of peppermint oil and caraway oil in patients suffering from FD could be proven effective by well-designed clinical trials.

关键词： Dyspepsia Functional dyspepsia Definition Diagnosis Management Drug efficacy Clinical trials Outcome measurements herbal drugs

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