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292篇 您的检索式:作者名="A Ivan"
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1Acute necrotizing pancreatitis as fi rst manifestation of primary hyperparathyroidism显示文摘We report the case of a female patient with severe acute necrotizing pancreatitis associated with hypercalcemia as first manifestation of primary hyperparathyroidism caused by a benign parathyroid adenoma.Initially the acute pancreatitis was treated conservatively.The patient subsequently underwent surgical resection of the parathyroid adenoma and surgical clearance of a large infected pancreatic pseudocyst.Although the association of parathyroid adenoma-induced hypercalcemia and acute pancreatitis is a known medical entity,it is very uncommon.The pathophysiology of hypercalcemia-induced acute pancreatitis is therefore not well known,although some mechanisms have been proposed.It is important to treat the provoking factor.Therefore,the cause of hypercalcemia should be identif ied early.Surgical resection of the parathyroid adenoma is the ultimate therapy.Jeroen I Lenz Jimmy M Jacobs Bart Op de Beeck Ivan A Huyghe Paul A Pelckmans Tom G Moreels 2010World Journal of Gastroenterology2010,16,23:9
2ELISA快速测定小麦中硫丹及硫丹硫酸酯显示文摘研究应用酶联免疫方法,快速检测小麦中硫丹及硫丹硫酸酯。小麦经80%甲醇提取后,用PBS/T缓冲液稀释5倍后,酶联免疫方法直接测定。方法平均回收率为73.3%~88.8%,线性范围1.5μg/L^25μg/L,最低检测限0.4μg/L,变异系数<10.03%。经气相色谱/质谱联用方法验证,灵敏度、重现线和准确度均符合快速检测要求。该法具有快速、简便、低耗、易操作等特点。吕潇 聂燕 陈子雷 黎秀卿 李慧冬 李瑞菊 张红 万春燕 朱端卫 Lee Nanju A Shields Ross Kennedy Ivan R 2006中国粮油学报2006,21,5:6
3Through-needle all-optical ultrasound imaging in vivo: a preclinical swine study显示文摘High-frequency ultrasound imaging can provide exquisite visualizations of tissue to guide minimally invasive procedures.Here,we demonstrate that an all-optical ultrasound transducer,through which light guided by optical fibers is used to generate and receive ultrasound,is suitable for real-time invasive medical imaging in vivo.Broad-bandwidth ultrasound generation was achieved through the photoacoustic excitation of a multiwalled carbon nanotube-polydimethylsiloxane composite coating on the distal end of a 300-μm multi-mode optical fiber by a pulsed laser.The interrogation of a high-finesse Fabry–Pérot cavity on a single-mode optical fiber by a wavelength-tunable continuous-wave laser was applied for ultrasound reception.This transducer was integrated within a custom inner transseptal needle(diameter 1.08 mm;length 78 cm)that included a metallic septum to acoustically isolate the two optical fibers.The use of this needle within the beating heart of a pig provided unprecedented realtime views(50 Hz scan rate)of cardiac tissue(depth:2.5 cm;axial resolution:64μm)and revealed the critical anatomical structures required to safely perform a transseptal crossing:the right and left atrial walls,the right atrial appendage,and the limbus fossae ovalis.This new paradigm will allow ultrasound imaging to be integrated into a broad range of minimally invasive devices in different clinical contexts.Malcolm C Finlay Charles A Mosse Richard J Colchester Sacha Noimark Edward Z Zhang Sebastien Ourselin Paul C Beard Richard J Schilling Ivan P Parkin Ioannis Papakonstantinou Adrien E Desjardins 2017Light(Science & Applications)2017,6,1:6
4Hepatic ischemic preconditioning increases portal vein flow in experimental liver ischemia reperfusion injury显示文摘BACKGROUND: Ischemic preconditioning(IPC) has been shown to decrease liver injury and to increase hepatic microvascular perfusion after liver ischemia reperfusion. This study aimed to evaluate the effects of IPC on hemodynamics of the portal venous system. METHODS: Thirty-two rats were randomized into two groups: IPC group and control group. The rats of the IPC group underwent IPC by 10 minutes of liver ischemia followed by 10 minutes of reperfusion before liver ischemia, and the rats of the control group were subjected to 60 minutes of partial liver ischemia. Non-ischemic lobes were resected immediately after reperfusion. The animals were studied at 4 hours and 12 hours after reperfusion. Mean arterial pressure, heart rate, portal vein flow and pressure were analyzed. Blood was collected for the determination of the levels of aspartate aminotransferase, alanine aminotransferase, calcium, lactate, pH, bicarbonate, and base excess. RESULTS: IPC increased the mean portal vein flow at 4 hours and 12 hours after reperfusion. IPC recovered 78% of the meanportal vein flow at 12 hours after reperfusion. IPC decreased the levels of aspartate aminotransferase, alanine aminotransferase and lactate, and increased the levels of ionized calcium, bicarbonate and base excess at 12 hours after reperfusion. CONCLUSIONS: This study demonstrated that IPC increases portal vein flow and enhances hepatoprotective effects in liver ischemia reperfusion. The better recovery of portal vein flow after IPC may be correlated with the lower levels of transaminases and with the better metabolic profile.Estela RR Figueira Joel A Rocha-Filho Mauro Nakatani Marcelo FS Buto Eduardo R Tatebe Vitor O Andre Ivan Cecconello Luiz AC D'Albuquerque 2014Hepatobiliary & Pancreatic Diseases International2014,13,1:6
5Contribution of functional KIR3DL1 to ankylosing spondylitis显示文摘Increasing evidence points to a role for killer immunoglobulin-like receptors(KIRs)in the development of autoimmune diseases.In particular,a positive association of KIR3DS1(activating receptor)and a negative association of KIR3DL1(inhibitory receptor)alleles with ankylosing spondylitis(AS)have been reported by several groups.However,none of the studies analyzed these associations in the context of functionality of polymorphic KIR3DL1.To better understand how the KIR3DL1/3DS1 genes determine susceptibility to AS,we analyzed the frequencies of alleles and genotypes encoding functional(KIR3DL1*F)and non-functional(KIR3DL1*004)receptors.We genotyped 83 AS patients and 107 human leukocyte antigen(HLA)-B27-positive healthy controls from the Russian Caucasian population using a two-stage sequence-specific primer PCR,which distinguishes KIR3DS1,KIR3DL1*F and KIR3DL1*004 alleles.For the patients carrying two functional KIR3DL1 alleles,those alleles were additionally genotyped to identify KIR3DL1*005 and KIR3DL1*007 alleles,which are functional but are expressed at low levels.KIR3DL1 was negatively associated with AS at the expense of KIR3DL1*F but not of KIR3DL1*004.This finding indicates that the inhibitory KIR3DL1 receptor protects against the development of AS and is not simply a passive counterpart of the segregating KIR3DS1 allele encoding the activating receptor.However,analysis of genotype frequencies indicates that the presence of KIR3DS1 is a more important factor for AS susceptibility than the absence of KIR3DL1*F.The activation of either natural killer(NK)or T cells via the KIR3DS1 receptor can be one of the critical events in AS development,while the presence of the functional KIR3DL1 receptor has a protective effect.Nevertheless,even individuals with a genotype that carried two inhibitory KIR3DL1 alleles expressed at high levels could develop AS.Ivan V Zvyagin Ilgar Z Mamedov Olga V Britanova Dmitriy B Staroverov Evgeni L Nasonov Anna G Bochkova Anna V Chkalina Alexei A Kotlobay Dmitriy O Korostin Denis V Rebrikov Sergey Lukyanov Yuri B Lebedev Dmitriy M Chudakov 2010Cellular & Molecular Immunology2010,7,6:5
6茶叶中硫丹及硫丹硫酸酯的ELISA快速测定显示文摘研究应用酶联免疫方法,快速检测茶叶中硫丹及硫丹硫酸酯。茶叶提取后,不净化,用PBS缓冲液稀释500倍后,进行酶联免疫方法测定,方法平均回收率为86.6%-91.1%;经SPE净化后,回收率68.7%-123%。标准曲线IC50为2μg/L,线性范围1-10μg/L。直接提取法最低检测限2mg/kg,净化法为0.06mg/kg。经气相色谱/质谱联用方法验证,灵敏度、精密度和准确度均符合快速检测要求。该法具有快速、简便、低耗、易操作等特点。吕潇 任凤山 王文博 杜红霞 李慧冬 丁蕊艳 朱端卫 LEE Nanju A SHEILD Ross KENNEDY Ivan R 2006茶叶科学2006,26,2:5
7Intraoperative laparoscopic complications for urological cancer procedures显示文摘AIM: To structure the rate of intraoperative complications that requires an intraoperative or perioperative resolution. METHODS: We perform a literature review of Medline database. The research was focused on intraoperative laparoscopic procedures inside the field of urological oncology. General rate of perioperative complications in laparoscopic urologic surgery is described to be around 12.4%. Most of the manuscripts published do not make differences between pure intraoperative, intraoperative with postoperative consequences and postoperative complications. RESULTS: We expose a narrative statement of complications, possible solutions and possible preventions for most frequent retroperitoneal and pelvic laparoscopic surgery. We expose the results with the following order: retroperitoneal laparoscopic surgery(radical nephrectomy, partial nephrectomy, nephroureterectomy and adrenalectomy) and pelvic laparoscopic surgery(radical prostatectomy and radical cystectomy).CONCLUSION: Intraoperative complications vary from different series. More scheduled reports should be done in order to better understand the real rates of complications.Sergio Fernández-Pello Montes Ivan Gonzalez Rodríguez Rodrigo Gil Ugarteburu Luis Rodríguez Villamil Begoa Diaz Mendez Patricio Suarez Gil Javier Mosquera Madera 2015World Journal of Clinical Cases2015,3,5:4
8syndecan-1和-2表达形式的变化可以预测前列腺癌生化复发显示文摘前列腺癌的临床特点不能准确确定患者是否会发生生化复发,因而不适合作为预后和复发的指标。需要新的分子标记物对患者进行适当的术前风险分层。本研究旨在评估syndecan-1和-2的表达改变是否可以预测临床局限性前列腺癌患者行前列腺根治术后的生化复发。取60份局限性前列腺癌患者的石蜡包埋组织标本,采用免疫组化染色检测syndecan-1和-2的表达。取10份良性前列腺增生患者的样本作为非恶性对照。利用半定量分析,对其进行染色评估。为探讨预后效果,用Kaplan—Meier生存曲线进行分析,并进行log—rank检验。在良性前列腺样本中,syndecan-1在基底层上皮细胞中有表达,在上皮分泌细胞的基侧膜上也有表达;syndecan-2则主要但挞底层上皮细胞中表达。前列腺癌样本中,两种syndecan的表达模式都转变成定位在颗粒状细胞质上。生存分析显示,在游离前列腺特异性抗原(fPSA)复发存活曲线中,正常和改变的syndecan-1和-2的表达存在显著差异(P〈0.05)。这些数据表明,syndecan—1和-2可以作为临床局灶性前列腺癌患者预后的标记物,从而改进前列腺特异性抗原(PSA)评估复发风险,增加风险分层。Rodrigo Ledezma Federico Cifuentes Ivan Gallegos Juan Fulla Enrique Ossandon Enrique A Castellon Hector R Contreras 2011Asian Journal of Andrology2011,13,3:2
9RF thermal and new cold part design studies on a TTF-Ⅲ input coupler for Project-X显示文摘An RF power coupler is one of the key components in a superconducting (SC) linac. It provides RF power to the SC cavity and interconnects different temperature layers (1.8 K, 4.2 K, 70 K and 300 K). The TTF-Ⅲ coupler is one of the most promising candidates for the High Energy (HE) linac of Project X, but it cannot meet the average power requirements because of the relatively high temperature rise on the warm inner conductor, so some design modifications will be required. In this paper, we describe our simulation studies on the copper coating thickness on the warm inner conductor with RRR values of 10 and 100. Our purpose is to rebalance the dynamic and static loads, and finally lower the temperature rise along the warm inner conductor. In addition, to get stronger coupling, better power handling and less multipacting probability, one new cold part design was proposed using a 60 mm coaxial line; the corresponding multipacting simulation studies have also been investigated.裴士伦 Chris E Adolphsen 李增海 Nikolay A Solyak Ivan V Gonin 2012Chinese Physics C2012,36,2:2
10Concurrent use of aromatase inhibitors and hypofractionated radiation therapy显示文摘AIM: To retrospectively assess the acute and long-term toxicity using aromatase inhibitors (AI) therapy concurrently with hypofractionated radiotherapy (HFRT) in breast cancer patients. METHODS: From November 1999 to October 2007, 66 patients were treated with breast HFRT and concurrent AI. In 63 patients (95.5%), HFRT delivered a total dose of 32.5 Gy to the whole breast within 5 wk (five fractions, one fraction per week). Other fractionations were chosen in three patients for the patients' personal convenience. A subsequent boost to the tumor bed was delivered in 35 patients (53.0%). Acute toxicities were scored according to the Common Toxicity Criteria for Adverse Events v3. Late toxicity was defined as any toxicity occurring more than 6 mo after completion of HFRT and was scored according to the Late Effects Normal Tissue Task Force-Subjective, Objective, Management and Analytic scale. RESULTS: At the end of the HFRT course, 19 patients (28.8%) had no irradiation-related toxicity. Acute grade 1-2 epithelitis was observed in 46 patients (69.7%). One grade 3 toxicity (1.5%) was observed. With a median follow-up of 34 mo (range: 12-94 mo), 31 patients (47%) had no toxicity, and 35 patients (53%) presented with grade 1-2 fibrosis. No grade 3 or greater delayed toxicity was observed. CONCLUSION: We found that AI was well tolerated when given concurrently with HFRT. All toxicities were mild to moderate, and no treatment disruption was necessary. Further prospective assessment is warranted.Cyrus Chargari Pablo Castro-Pena Ivan Toledano Marc A Bollet Alexia Savignoni Paul Cottu Fatima Laki Franois Campana Patricia De Cremoux Alain Fourquet Youlia M Kirova 2012World Journal of Radiology2012,4,7:2
11High rate deformation of magnesium single crystals 显示文摘Schweighofer A Polakovic A Ivan J 1971Kovove Mater1971,9,4:1
12Modeling and identification of fertility maps using artificial neural networks显示文摘José A Ulson Ivan N Silva Sérgio H Benez 2000IEEE2000,,:1
13Toward a Theory of Anaphofic Pro- cessing 显示文摘Sag Ivan A Hankarner J 1984Linguistics and Philosophy1984,,7:1
14Current control strategy for brushless DC motors based on a common DC signal显示文摘Juan W Dixon Ivan A Leal 2009IEEE Transaction on Power Electronics2009,17,2:1
15Role of endothelin-1 in lung disease显示文摘Karen A Ivan F McMurtry 2001Respir Res2001,2,2:1
16A discrete ele- ment model to investigate sub-surface damage due to surface polishing 显示文摘Ivan Iordanoff Battentier A Charles J L 2008Tribology Int2008,41,11:1
17Modeling and simulation of airworthiness requirements for an HSCT prt totype in early design显示文摘ivan Y Burdun Daniel A Delaurentis Dimilri N Mavris 1998AIAA-98-49361998,,:1
18Determination of 36 elements in plant reference materials with different Si contents by inductively coupled plasma mass spectrometry: Comparison of icrowave digestions assisted by three types of digestion mixtures 显示文摘Julie Suchamv' a Ivan Suchara 2005Analytica Chimica Acta2005,576,:1
19Prognostic value ofmiR-155 in individuals with monoclonal B-cell lymphocytosis and patients with B chronic lymphocytic leukemia 显示文摘Ferrajoli A Shanafelt TD Ivan C 2013Blood2013,122,11:1
20Study of sol-gel TiO2 and TiO2 -MnO obtained from a peptized solution 显示文摘Harizanov Ivan ova T Harizanova A 2001Mater Lett2001,49,34:1
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