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1Increased proliferation activity measured by immunoreactive Ki67 is associated with survival improvement in rectal/recto sigmoid cancer显示文摘AIM: To assess the expression of Ki67 as prognosticator in rectal/recto sigmoid cancer.METHODS: Samples from 146 patients with rectal and recto sigmoid cancer were studied for expression of Ki67 and its prognostic significance in comparison with clinicopathological predictors of survival. Formalin-fixed, paraffin-embedded tissues from 6 (4.1%) patients with T1, 26 (17.8%) with T2, 94 (64.4%) with T3, and 20 (13.7%) with T4 tumors were studied. Ki67 expression was determined immunohistochemically. Samples were divided according to mean value into high (>40%) and low (≤40%) expression. Areas of extensive proliferation (>50%) were defined as 'hot spot' areas. RESULTS: Hot spot areas were present in samples regardless of histopathological grade. Lower TNM and Dukes stage and higher expression of Ki67 and presence of Ki67 hot spot areas in histopathological samples were associated with better survival, whereas no association was observed with histopathological grade (P = 0.78). In Cox multivariate regression analysis, significant prognostic factors were Dukes stage (P<0.001), presence of lymph node metastases (P = 0.015), age (P = 0.035) andpresence of Ki67 hot spot areas (P = 0.044). CONCLUSION: Proliferative activity as measured by Ki67 in rectal cancer is associated with survival improvement compared with patients with low Ki67. Areas of prognostically significant increased proliferation were found independently of histopathological tumor grade.Eeva Salminen Salla Palmu Tero Vahlberg Peter J.Roberts Karl-Owe S(o|¨)derstr(o|¨)m 2005World Journal of Gastroenterology2005,11,21:15
2Budesonide induces complete remission in autoimmune hepatitis显示文摘瞄准:泼尼松和 azathioprine 为自体免疫的肝炎(AIH ) 代表标准疗法。然而,仅仅, 65% 病人进入完全的组织学的宽恕。最近, budesonide (芽) 被报导是一种有希望的选择。在这研究,我们在 AIH 估计了芽的功效和安全。方法:十八个病人(12 个女人, 6 个男人;吝啬的年龄 45.4+/-21 年) 与芽(Budenofalk ) 与 AIH 被对待在上面三次每日、跟随的 3 mg 为至少 24 wk.Seven,病人们也有主要胆汁性肝硬变(n=5 ) 或主要致硬化的胆管炎(n=2 ) 的特征。先进的肝纤维变性或肝硬化在 6 个病人是在场的。结果:十五(83%) 病人们有完全的临床、生物化学的宽恕。十个病人,与尖锐肝炎包括五,作为首要的治疗被给芽,哪个七进入宽恕。三个病人,二与肝肝硬化,没改善。有第二线的治疗的所有病人经历了长期的宽恕。组织学的宽恕也在三个病人被看见。临床上相关的导致芽的副作用与肝肝硬化(n=4 ) 仅仅在病人被记录。结论:芽在在我们有 AIH.Side 效果的病人的多数的宽恕正式就职是有效的,治疗失败主要与肝肝硬化在病人被观察。Antal Csepregi Christoph R(o|¨)cken Gerhard Treiber Peter Malfertheiner 2006World Journal of Gastroenterology2006,12,9:14
3Toll-like receptor 4 and NOD2/CARD15 mutations in Hungarian patients with Crohn's disease: Phenotype-genotype correlations显示文摘AIM: To determine common NOD2/CARD15 mutations and TLR4 D299G polymorphism in Hungarian patients with CD.METHODS: A total of 527 unrelated patients with CD (male/female: 265/262, age: 37.1 (SD 7.6) years) and 200 healthy subjects were included. DNA was screened for possible NOD2/CARD15 mutations by denaturing highperformance liquid chromatography (confirmed by direct sequencing). TLR4 D299G was tested by PCR-RFLP.RESULTS: NOD2/CARD15 mutations were found in 185patients (35.1%) and in 33 controls (16.5%, P<0.0001).SNP8/R702W (10.8% vs 6%, P = 0.02), SNP13/3020insC (19.4% vs 5%, P<0.0001) and exon4 R703C (2.1% vs 0%, P = 0.02) mutations were more frequent in CD, while the frequency of SNP12/G908R was not increased. The frequency of TLR4 D299G was not different (CD: 9.9% vscontrols: 12.0%). Variant NOD2/CARD15 allele was associated with an increased risk for CD (ORhet = 1.71,95%CI = 1.12-2.6, P= 0.0001, ORtwo-riskalleles = 25.2,95%CI = 4.37- , P<0.0001), early disease onset (carrier:26.4 years vs non-carrier: 29.8 years, P = 0.0006), ileal disease (81.9% vs 69.5%, OR = 1.99, 95%CI = 1.29-3.08,P = 0.02, presence of NOD2/CARD15 and TLR4: 86.7% vs64.8%), stricturing behavior (OR = 1.69, 95%CI = 1.13-2.55,P = 0.026) and increased need for resection (OR=1.71,95%CI: 1.13-2.62, P= 0.01), but not with duration, extraintestinal manifestations, familial disease or smoking. TLR4exhibited a modifier effect: age of onset in wt/TLR4 D299G carriers: 27.4 years vs NOD2mut/TLR D299G: 23 years (P= 0.06), in NOD2mut/wt: 26.7 years.CONCLUSION: These results confirm that variant NOD2/CARD15 (R702W, R703C and 3020insC) alleles are associated with earlier disease onset, ileal disease,stricturing disease behavior in Hungarian CD patients. In contrast, although the frequency of TLR4 D299G polymorphism was not different from controls, NOD2/TLR4mutation carriers tended to present at earlier age.Peter Laszlo Lakatos Laszlo Lakatos Ferenc Szalay Claudia Willheim-Polli Christoph (O|¨)sterreicher Zsolt Tulassay Tamas Molnar Walter Reinisch Janos Papp Gyula Mozsik Hungarian IBD Study Group Peter Ferenci 2005World Journal of Gastroenterology2005,11,10:14
4Cyclooxygenase-2 polymorphisms and the risk of esophageal adeno-or squamous cell carcinoma显示文摘AIM:To determine whether-1195 A→G and/or-765 G→C polymorphisms in Cyclooxygenase-2(COX-2 ) may have a risk modifying effect on the development of esophageal carcinoma in a Dutch Caucasian population.METHODS:Two study groups were recruited, 252 patients with esophageal carcinoma and 240 healthy controls, matched for race, age, gender and recruiting area.DNA was isolated from whole blood and used for genotyping.PCR products were digested with restriction enzymes and products were analyzed by agarose gel electrophoresis.Odds ratios(OR) and 95% confldence intervals(CI) were estimated.RESULTS:The distribution of the-1195 A→G polymorphism was signif icantly different in esophageal cancer patients compared to controls.The-1195 GG genotype resulted in a higher risk of developing esophageal adenocarcinoma(OR = 3.85, 95% CI:1.45-10.3) compared with the-1195 AA genotype as a reference.The-765 G→C genotype distribution was not different between the two groups.The GG/ GG haplotype was present more often in esophageal adenocarcinoma patients than in controls(OR = 3.45, 95% CI:1.24-9.58;with AG/AG as a reference).The same trends were observed in patients with squamous cell carcinomas, however, the results did not reach statistical signif icance.CONCLUSION:Presence of the COX-2-1195 GG genotype and of the GG/GG haplotype may result in a higher risk of developing esophageal carcinoma.Jón O Kristinsson Paul van Westerveld Rene HM te Morsche Hennie MJ Roelofs T Wobbes Ben JM Witteman Adriaan CITL Tan Martijn GH van Oijen Jan BMJ Jansen Wilbert HM Peters 2009World Journal of Gastroenterology2009,15,28:11
5Rectal nitric oxide as biomarker in the treatment of inflammatory bowel disease: Responders versus nonresponders显示文摘瞄准:探索直肠的氮的氧化物(没有) 作为处理的简历标记,在 ulcerative (UC ) 和 Crohn 的反应是疾病(CD ) ,并且检验在之间的关系直肠没有,没有 synthases (NOS ) 的粘膜表示,和支持 inflammatory cytokines。方法:有 UC 的 22 个病人并且 24 在类固醇治疗期间与 CD 被监视。直肠没有层次被测量,临床的活动在天被估计 1, 3, 7 和 28。NOS 和支持 inflammatory cytokines 的粘膜存在被免疫组织化学和 RT-PCR 分析。结果:显著地显示的活跃 UC 和 CD 增加了直肠没有层次(10950 +/- 1280 每十亿分开的 7610 和 5040 +/-(ppb ) ,分别地) 作为与控制相比(154 +/- 71 ppb, P < 0.001 ) 。直肠不在 UC 和 CD 与疾病活动微弱地相关(r = 0.34 为 UC 和 r = 0.48 为 CD, P < 0.01 ) 。在 12 个病人,一堂类固醇倔强的功课导致了结肠切除术。仅仅稍微有的这些病人没增加层次(UC:620 +/- 270 ppb;CD:1260 +/- 550 ppb ) 与那些相比与治疗学的回答(UC:18860 +/- 530 ppb, P < 0.001;CD:10060 +/- 3200 ppb, P < 0.05 ) 。结论:直肠没有水平是在是的 IBD 的治疗反应的一个有用简历标记低没有层次预言差的临床的回答到类固醇治疗。Tryggve Ljung Sofie Lundberg Mark Varsanyi Catharina Johansson Peter T Schmidt Max Herulf Jon O Lundberg Per M Hellstr(o|¨)m 2006World Journal of Gastroenterology2006,12,21:10
6A Phase I Study of an Agonist CD40 Monoclonal Antibody (CP-870,893) in Combination with Gemcitabine in Patients with Advanced Pancreatic Ductal Adenocarcinoma显示文摘Gregory L. Beatty Drew A. Torigian E. Gabriela Chiorean Babak Saboury Alex Brothers Abass Alavi Andrea B. Troxel Weijing Sun Ursina R. Teitelbaum Robert H. Vonderheide Peter J. O’Dwyer 2013Clinical Cancer Research2013,,22:6
7Evolution of indications and results of liver transplantation in Europe. A report from the European Liver Transplant Registry (ELTR)显示文摘René Adam Vincent Karam Valérie Delvart John O’Grady Darius Mirza Jurgen Klempnauer Denis Castaing Peter Neuhaus Neville Jamieson Mauro Salizzoni Stephen Pollard Jan Lerut Andreas Paul Juan Carlos Garcia-Valdecasas Fernando San Juan Rodríguez Andrew Burro 2012Journal of Hepatology2012,,3:6
8Model Identification of a Micro Air Vehicle显示文摘This paper is focused on the model identification of a Micro Air Vehicle (MAV) in straight steady flight condition. The identification is based on input-output data collected from flight tests using both frequency and time domain techniques. The vehicle is an in-house 40 cm wingspan airplane. Because of the complex coupled, multivariable and nonlinear dynamics of the aircraft, linear SISO structures for both the lateral and longitudinal models around a reference state were derived. The aim of the identification is to provide models that can be used in future development of control techniques for the MAV.Jorge Nio Flavius Mitrache Peter Cosyn Robin De Keyser 2007Journal of Bionic Engineering2007,4,4:5
9Role of interleukin-1 and its antagonism of hepatic stellate cell proliferation and liver fibrosis in the Abcb4^(-/-) mouse model显示文摘AIM: To study the interleukin-1(IL-1) pathway as a therapeutic target for liver fibrosis in vitro and in vivo using the ATP-binding cassette transporter b4^(-/-)(Abcb4^(-/-)) mouse model.METHODS: Female and male Abcb4^(-/-) mice from 6 to 13 mo of age were analysed for the degree of cholestasis(liver serum tests), extent of liver fibrosis(hydroxyproline content and Sirius red staining) and tissue-specific activation of signalling pathways such as the IL-1 pathway [quantitative polymerase chain reaction(q PCR)]. For in vivo experiments, murine hepatic stellate cells(HSCs) were isolated via pronasecollagenase perfusion followed by density gradient centrifugation using female mice. Murine HSCs were stimulated with up to 1 ng/m L IL-1β with or without 2.5 μg/m L Anakinra, an IL-1 receptor antagonist, respectively. The proliferation of murine HSCs was assessed via the Brd U assay. The toxicity of Anakinra was evaluated via the fluorescein diacetate hydrolysis(FDH) assay. In vivo 8-wk-old Abcb4^(-/-) mice with an already fully established hepatic phenotype were treated with Anakinra(1 mg/kg body-weight daily intraperitoneally) or vehicle and liver injury and liver fibrosis were evaluated via serum tests, q PCR, hydroxyproline content and Sirius red staining. RESULTS: Liver fibrosis was less pronounced in males than in female Abcb4^(-/-) animals as defined by a lower hydroxyproline content(274 ± 64 μg/g vs 436 ± 80 μg/g liver, respectively; n = 13-15; P < 0.001; MannWhitney U-test) and lower m RNA expression of the profibrogenic tissue inhibitor of metalloproteinase-1(TIMP)(1 ± 0.41 vs 0.66 ± 0.33 fold, respectively; n = 13-15; P < 0.05; Mann-Whitney U-test). Reduced liver fibrosis was associated with significantly lower levels of F4/80 m RNA expression(1 ± 0.28 vs 0.71 ± 0.41 fold, respectively; n = 12-15; P < 0.05; Mann-Whitney U-test) and significantly lower IL-1β m RNA expression levels(1 ± 0.38 vs 0.44 ± 0.26 fold, respectively; n = 13-15; P < 0.001; Mann-Whitney U-test). No gender differences in the serum liver parameters [bilirubin; alanine aminotransferase(ALT); aspartate aminotransferase and alkaline phosphatase(AP)] were found. In vitro, the administration of IL-1β resulted in a significant increase in HSC proliferation [0.94 ± 0.72 arbitrary units(A.U.) in untreated controls, 1.12 ± 0.80 A.U. at an IL-1β concentration of 0.1 ng/m L and 1.18 ± 0.73 A.U. at an IL-1β concentration of 1 ng/m L in samples from n = 6 donor animals; P < 0.001; analyses of variance(ANOVA)]. Proliferation was reduced significantly by the addition of 2.5 μg/m L Anakinra(0.81 ± 0.60 A.U. in untreated controls, 0.92 ± 0.68 A.U. at an IL-1β concentration of 0.1 ng/m L, and 0.91 ± 0.69 A.U. at an IL-1β concentration of 1 ng/m L; in samples from n = 6 donor animals; P < 0.001; ANOVA) suggesting an anti-proliferative effect of this clinically approved IL-1 receptor antagonist. The FDH assay showed this dose to be non-toxic in HSCs. In vivo, Anakinra had no effect on the hepatic hydroxyprolinecontent, liver serum tests(ALT and AP) and profibrotic(collagen 1α1, collagen 1α2, transforming growth factor-β, and TIMP-1) and anti-fibrotic [matrix metalloproteinase 2(MMP2), MMP9 and MMP13 ] gene expression after 4 wk of treatment. Furthermore, the hepatic IL-1β and F4/80 m RNA expression levels were unaffected by Anakinra treatment.CONCLUSION: IL-1β expression is associated with the degree of liver fibrosis in Abcb4^(-/-) mice and promotes HSC proliferation. IL-1 antagonism shows antifibrotic effects in vitro but not in Abcb4^(-/-) mice.Florian P Reiter Ralf Wimmer Lena Wottke Renate Artmann Jutta M Nagel Manuel O Carranza Doris Mayr Christian Rust Peter Fickert Michael Trauner Alexander L Gerbes Simon Hohenester Gerald U Denk 2016World Journal of Hepatology2016,8,8:3
10Normalised intrinsic mortality risk in liver transplantation: European Liver Transplant Registry study显示文摘René Adam Valérie Cailliez Pietro Majno Vincent Karam Paul McMaster Roy Y Calne John O’Grady Rudolf Pichlmayr Peter Neuhaus Jean-Bernard Otte Krister Hoeckerstedt Henri Bismuth 2000The Lancet . 2000 (9230)2000,,9230:3
11The amazing potential of fungi:50 ways we can exploit fungi industrially显示文摘Fungi are an understudied,biotechnologically valuable group of organisms.Due to the immense range of habitats that fungi inhabit,and the consequent need to compete against a diverse array of other fungi,bacteria,and animals,fungi have developed numerous survival mechanisms.The unique attributes of fungi thus herald great promise for their application in biotechnology and industry.Moreover,fungi can be grown with relative ease,making production at scale viable.The search for fungal biodiversity,and the construction of a living fungi collection,both have incredible economic potential in locating organisms with novel industrial uses that will lead to novel products.This manuscript reviews fifty ways in which fungi can potentially be utilized as biotechnology.We provide notes and examples for each potential exploitation and give examples from our own work and the work of other notable researchers.We also provide a flow chart that can be used to convince funding bodies of the importance of fungi for biotechnological research and as potential products.Fungi have provided the world with penicillin,lovastatin,and other globally significant medicines,and they remain an untapped resource with enormous industrial potential.Kevin D.Hyde Jianchu Xu Sylvie Rapior Rajesh Jeewon Saisamorn Lumyong Allen Grace T.Niego Pranami D.Abeywickrama Janith V.S.Aluthmuhandiram Rashika S.Brahamanage Siraprapa Brooks Amornrat Chaiyasen K.W.Thilini Chethana Putarak Chomnunti Clara Chepkirui Boontiya Chuankid Nimali I.de Silva Mingkwan Doilom Craig Faulds Eleni Gentekaki Venkat Gopalan Pattana Kakumyan Dulanjalee Harishchandra Hridya Hemachandran Sinang Hongsanan Anuruddha Karunarathna Samantha C.Karunarathna Sehroon Khan Jaturong Kumla Ruvishika S.Jayawardena Jian-Kui Liu Ningguo Liu Thatsanee Luangharn Allan Patrick G.Macabeo Diana S.Marasinghe Dan Meeks Peter E.Mortimer Peter Mueller Sadia Nadir Karaba N.Nataraja Sureeporn Nontachaiyapoom Meghan O’Brien Watsana Penkhrue Chayanard Phukhamsakda Uma Shaanker Ramanan Achala R.Rathnayaka Resurreccion B.Sadaba Birthe Sandargo Binu C.Samarakoon Danushka S.Tennakoon Ramamoorthy Siva Wasan Sriprom T.S.Suryanarayanan Kanaporn Sujarit Nakarin Suwannarach Thitipone Suwunwong Benjarong Thongbai Naritsada Thongklang Deping Wei S.Nuwanthika Wijesinghe Jake Winiski Jiye Yan Erandi Yasanthika Marc Stadler 2019Fungal Diversity2019,,4:3
12人参减少 γ射线照射的淋巴细胞微核量(英文)显示文摘目的 评价中国人参对减少辐射诱导的人周围血 G0 期淋巴细胞 (PBL)微核量的作用。方法 采用细胞因子阻滞的微核法检测健康志愿者的血标本。体外 1 37Cs照射之前 ,每份血标本的单个核细胞培养以不同浓度 (0~ 2 0 0 0μg· m l- 1 )的人参根水提取物孵育 2 4 h。结果 (1)在 0 Gy时 ,每 10 0 0个双核 (BN )细胞的微核量是 11.3± 2 .7,人参水提取物≥ 5 0 0μg· ml- 1 时微核量下降 ,但微核量和人参水提取物的浓度之间的差异是显著的。 (2 )单独射线照射显著增加微核量 ,当暴露于 1Gy的照射时 ,随着培养介质中人参水提取物浓度的增加 ,微核量呈显著的线性降低 (R2 =0 .0 5 ,P =0 .0 0 2 ) ;对暴露于 1Gy辐射诱导的微核量 ,人参水提取物浓度在 15 0 0μg· m l- 1 时减少 4 6 .6 % ,浓度在 2 0 0 0μg·m l- 1时减少 5 7.6 % ;对暴露于 2 Gy辐射诱导的微核量的减少呈更强的线性相关 (R2 =0 .7,P=0 .0 0 0 1) ;(3)微核数据分析的结果呈现出与 Poisson模型相关的过度离散趋势。结果表明 :(1)人参水提取物浓度达 2 0 0 0 μg· ml- 1时 ,对 PBL 细胞毒作用无明显影响 ;(2 )人参水提取物浓度在 5 0 0 μg· ml- 1和 2 0 0 0 μg· ml- 1之间时 ,对抗 1 37Cs照射诱导的 MN发挥保护作用。李同光 Ron R Allison Kevin F O'Brien Prabhaker G Khazanie Larry J Dobbs Jr. Peter J Kragel 2004新乡医学院学报2004,21,3:3
13运动表现分析:过去、现在与未来显示文摘对运动表现分析的发展历程、现状、未来进行研究发现,运动表现分析起源于标记分析,历经一个多世纪的实践与研究完成了由方法向方法论的转型,进入21世纪后逐渐发展成为运动科学(Sports Science)的一个新兴分支学科。在运动表现分析实践中采用定性、定量以及两者相结合的方法对“人的运动”进行直接描述和分析,分析手段主要包括标记分析和移动分析,通常需要从方法和学科2个层面来理解其定义。技术和战术表现评估、信效度分析、负荷监控以及学科交叉研究是近年来运动表现分析领域的研究热点。运动表现分析相关专业的设立以及运动表现分析师这一新职业的出现有力地推动了运动训练的科学化。当前,运动表现分析的理论基础、技术手段、人才培养和学科影响力等方面还面临挑战,未来其理论体系将趋向完善,向分析智能化、服务对象大众化和人才培养专业化等方向发展。易清 黎涌明 张铭鑫 崔一雄 刘天彪 张绍良 龚炳南 黄展煜 周长敬 MiguelÁngel Gómez Ruano Daniel Memmert Peter O'Donoghue 刘鸿优 2023上海体育学院学报2023,47,2:3
14Evolution of liver transplantation in Europe: Report of the European Liver Transplant Registry显示文摘René Adam Paul McMaster John G. O’Grady Denis Castaing Jurgen L. Klempnauer Neville Jamieson Peter Neuhaus Jan Lerut Mauro Salizzoni Stephen Pollard Ferdinand Muhlbacher Xavier Rogiers Juan Carlos Garcia Valdecasas Joaquin Berenguer Daniel Jaeck Enrique M 2003Liver Transplantation2003,,12:2
15Identification of stable normalization genes for quantitative real-time PCR in porcine articular cartilage显示文摘Background: Expression levels for genes of interest must be normalized with an appropriate reference, or housekeeping gene, to make accurate comparisons of quantitative real-time PCR results. The purpose of this study was to identify the most stable housekeeping genes in porcine articular cartilage subjected to a mechanical injury from a panel of 10 candidate genes. Results: Ten candidate housekeeping genes were evaluated in three different treatment groups of mechanically impacted porcine articular cartilage. The genes evaluated were: beta actin, beta-2-microglobulin, glyceraldehyde-3-phosphate dehydrogenase, hydroxymethylbilane synthase, hypoxanthine phosphoribosyl transferase, peptidylprolyl isomerase A (cyclophilin A), ribosomal protein L4, succinate dehydrogenase flavoprotein subunit A, TATA box binding protein, and tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein-zeta polypeptide. The stability of the genes was measured using geNorm, BestKeeper, and NormFinder software. The four most stable genes measured via geNorm were (most to least stable) succinate dehydrogenase flavoprotein, subunit A, peptidylprolyl isomerase A, glyceraldehyde-3-phosphate dehydrogenase, beta actin; the four most stable genes measured via BestKeeper were glyceraldehyde-3-phosphate dehydrogenase, peptidylprolyl isomerase A, beta actin, succinate dehydrogenase flavoprotein, subunit A; and the four most stable genes measured via NormFinder were peptidylprolyl isomerase A, succinate dehydrogenase flavoprotein, subunit A, glyceraldehyde-3-phosphate dehydrogenase, beta actin. Conclusions: BestKeeper, geNorm, and NormFinder all generated similar results for the most stable genes in porcine articular cartilage. The use of these appropriate reference genes will facilitate accurate gene expression studies of porcine articular cartilage and suggest appropriate housekeeping genes for articular cartilage studies in other species.Ryan S McCulloch Melissa S Ashwell Audrey T O'Nan Peter L Mente 2012Journal of Animal Science and Biotechnology2012,3,4:2
16Lactobacillus and bifidobacterium in irritable bowel syndrome: Symptom responses and relationship to cytokine profiles显示文摘Liam O’Mahony Jane McCarthy Peter Kelly George Hurley Fangyi Luo Kersang Chen Gerald C. O’Sullivan Barry Kiely J. Kevin Collins Fergus Shanahan Eamonn M.M. Quigley 2005Gastroenterology2005,,3:2
17A new technique for Instantaneous frequency rate estimation显示文摘Peter O'Shea 2002IEEE Signal Processing Letters2002,9,8:2
18Three-dimensional simulation of liquid injection,film formation and transport,in fluidized beds显示文摘Liquid injection,and film formation and transport in dense-phase gas-solids fluidized beds are numerically simulated in three dimensions using a collisional exchange model that is based on the mechanism that collisions cause transfer of liquid mass,momentum,and energy between particles. In the model,each of the particles is represented by a solid core and a liquid film surrounding the core. The model is incorporated in the framework of the commercial code Barracuda? developed by CPFD Software. The commercial software is an advanced CFD-based computational tool where the particles are treated as discrete entities,calculated by the MP-PIC method,and tracked using the Lagrangian method. Details of the collisional liquid transfer model have been previously presented in O'Rourke,Zhao,and Snider (2009); this paper presents new capabilities and proof-testing of the collision model and a new method to better quantify the penetration length. Example calculations of a fluidized bed without liquid injection show the expected effect of collisions on the reduction of granular temperature (fluctuational kinetic energy) of the bed. When applied to liquid injection into a dense-phase fluidized bed under different conditions,the model predicts liquid penetration lengths comparable to the experiments. In addition,the simulation reveals for the first time the dynamic mixing of the liquid droplets with the bed particles and the transient distribution of the droplets inside the bed.Paul Zhao Peter J. O'Rourke Dale Snider 2009Particuology2009,7,5:2
19Meta-analysis and trial sequential analysis of randomized evidence comparing general anesthesia vs regional anesthesia for laparoscopic cholecystectomy显示文摘BACKGROUND In an effort to further reduce the morbidity and mortality profile of laparoscopic cholecystectomy,the outcomes of such procedure under regional anesthesia(RA)have been evaluated.In the context of cholecystectomy,combining a minimally invasive surgical procedure with a minimally invasive anesthetic technique can potentially be associated with less postoperative pain and earlier ambulation.AIM To evaluate comparative outcomes of RA and general anesthesia(GA)in patients undergoing laparoscopic cholecystectomy.METHODS A comprehensive systematic review of randomized controlled trials with subsequent meta-analysis and trial sequential analysis of outcomes were conducted in line with Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement standards.RESULTS Thirteen randomized controlled trials enrolling 1111 patients were included.The study populations in the RA and GA groups were of comparable age(P=0.41),gender(P=0.98)and body mass index(P=0.24).The conversion rate from RA to GA was 2.3%.RA was associated with significantly less postoperative pain at 4 h[mean difference(MD):-2.22,P<0.00001],8 h(MD:-1.53,P=0.0006),12 h(MD:-2.08,P<0.00001),and 24 h(MD:-0.90,P<0.00001)compared to GA.Moreover,it was associated with significantly lower rate of nausea and vomiting[risk ratio(RR):0.40,P<0.0001].However,RA significantly increased postoperative headaches(RR:4.69,P=0.03),and urinary retention(RR:2.73,P=0.03).The trial sequential analysis demonstrated that the meta-analysis was conclusive for most outcomes,with the exception of a risk of type 1 error for headache and urinary retention and a risk of type 2 error for total procedure time.CONCLUSION Our findings indicate that RA may be an attractive anesthetic modality for daycase laparoscopic cholecystectomy considering its associated lower postoperative pain and nausea and vomiting compared to GA.However,its associated risk of urinary retention and headache and lack of knowledge on its impact on procedure-related outcomes do not justify using RA as the first line anesthetic choice for laparoscopic cholecystectomy.Peter Asaad Adam O’Connor Shahab Hajibandeh Shahin Hajibandeh 2021World Journal of Gastrointestinal Endoscopy2021,13,5:2
20Evolution of liver transplantation in Europe: Report of the European Liver Transplant Registry显示文摘René Adam Paul McMaster John G. O’Grady Denis Castaing Jurgen L. Klempnauer Neville Jamieson Peter Neuhaus Jan Lerut Mauro Salizzoni Stephen Pollard Ferdinand Muhlbacher Xavier Rogiers Juan Carlos Garcia Valdecasas Joaquin Berenguer Daniel Jaeck Enrique M 2003Liver Transplantation2003,,12:2
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