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| 1 | Comparative review of vertebroplasty and kyphoplasty显示文摘The aim of this review is to compare the effectiveness of percutaneous vertebroplasty and kyphoplasty to treat pain and improve functional outcome from ver-tebral fractures secondary to osteoporosis and tumor conditions. In 2009, two open randomized controlled trials published in the New England Journal of Medicine questioned the value of vertebroplasty in treating ver-tebral compression fractures. Nevertheless, the prac-tice of physicians treating these conditions has barely changed. The objective of this review is to try to clarify the most important issues, based on our own experi-ence and the reported evidence about both techniques, and to guide towards the most appropriate choice of treatment of vertebral fractures, although many ques-tions still remain unanswered. | Ferno Ruiz Santiago Alicia Santiago Chinchilla Luis Guzmán álvarez Antonio Luis Pérez Abela Maria del Mar Castellano García Miguel Pajares López | 2014 | World Journal of Radiology2014，6，6： | 30 |
| 2 | Risk factors associated with the development of ischemic colitis显示文摘AIM:To ascertain the role of cardiovascular risk factors,cardiovascular diseases,standard treatments and other diseases in the development of ischemic colitis(IC).METHODS:A retrospective,case-control study was designed,using matched data and covering 161 incident cases of IC who required admission to our hospital from 1998 through 2003.IC was diagnosed on the basis of endoscopic findings and diagnostic or compatible his-tology.Controls were randomly chosen from a cohort of patients who were admitted in the same period and required a colonoscopy,excluding those with diagnosis of colitis.Cases were matched with controls(ratio 1:2),by age and sex.A conditional logistic regression was performed.RESULTS:A total of 483 patients(161 cases,322 con-trols)were included;mean age 75.67±10.03 years,55.9%women.The principal indications for colonos-copy in the control group were lower gastrointestinal hemorrhage(35.4%),anemia(33.9%),abdominal pain(19.9%)and diarrhea(9.6%).The endoscopic findings in this group were hemorrhoids(25.5%),diverticular disease(30.4%),polyps(19.9%)and colorectal cancer(10.2%).The following variables were associated with IC in the univariate analysis:arterial hypertension(P= 0.033);dyslipidemia(P<0.001);diabetes mellitus(P =0.025);peripheral arterial disease(P=0.004);heart failure(P=0.026);treatment with hypotensive drugs(P=0.023);angiotensin-converting enzyme inhibitors;(P=0.018);calcium channel antagonists(P=0.028);and acetylsalicylic acid(ASA)(P<0.001).Finally,the following variables were independently associated with the development of IC:diabetes mellitus[odds ratio(OR)1.76,95%confidence interval(CI):1.001-3.077,P=0.046];dyslipidemia(OR 2.12,95%CI:1.26-3.57,P=0.004);heart failure(OR 3.17,95%CI:1.31-7.68,P=0.01);peripheral arterial disease(OR 4.1,95%CI:1.32-12.72,P=0.015);treatment with digoxin(digitalis)(OR 0.27,95%CI:0.084-0.857,P=0.026);and ASA(OR 1.97,95%CI:1.16-3.36,P=0.012).CONCLUSION:The development of an episode of IC was independently associated with diabetes,dyslipid-emia,presence of heart failure,peripheral arterial dis-ease and treatment with digoxin or ASA. | Joaquín Cubiella Fernández Luisa Núez Calvo Elvira González Vázquez Maria Jesús García García Maria Teresa Alves Pérez Isabel Martínez Silva Javier Fernández Seara | 2010 | World Journal of Gastroenterology2010，16，36： | 27 |
| 3 | 在 laparoscopic 肝外科的快轨道的节目: 理论或事实?显示文摘 AIM:To analyze our results after the introduction of a fast-track(FT) program after laparoscopic liver surgery in our Hepatobiliarypancreatic Unit.METHODS:All patients(43) undergoing laparoscopic liver surgery between March 2004 and March 2010 were included and divided into two consecutive groups:Control group(CG) from March 2004 until December 2006 with traditional perioperative cares(17 patients) and fast-track group(FTG) from January 2007 until March 2010 with FT program cares(26 patients).Primary endpoint was the influence of the program on the postoperative stay,the amount of re-admissions,morbidity and mortality.Secondarily we considered duration of surgery,use of drains,conversion to open surgery,intensive cares needs and transfusion.RESULTS:Both groups were homogeneous in age and sex.No differences in technique,time of surgery or conversion to open surgery were found,but more malignant diseases were operated in the FTG,and then transfusions were higher in FTG.Readmissions and morbidity were similar in both groups,without mortality.Postoperative stay was similar,with a median of 3 for CG vs 2.5 for FTG.However,the 80.8% of patients from FTG left the hospital within the first 3 d after surgery(58.8% for CG).CONCLUSION:The introduction of a FT program after laparoscopic liver surgery improves the recovery of patients without increasing complications or re-admissions,which leads to a reduction of the stay and costs. | Belinda Sánchez-Pérez José Manuel Aranda-Narváez Miguel Angel Suárez-Muoz Moises elAdel-delFresno José Luis Fernández-Aguilar Jose Antonio Pérez-Daga Ysabel Pulido-Roa Julio Santoyo-Santoyo | 2012 | World Journal of Gastrointestinal Surgery2012，4，11： | 18 |
| 4 | Role of quorum sensing in bacterial infections显示文摘Quorum sensing(QS) is cell communication that is widely used by bacterial pathogens to coordinate the expression of several collective traits, including the production of multiple virulence factors, biofilm formation, and swarming motility once a population threshold is reached. Several lines of evidence indicate that QS enhances virulence of bacterial pathogens in animal models as well as in human infections; however, its relative importance for bacterial pathogenesis is still incomplete. In this review, we discuss the present evidence from in vitro and in vivo experiments in animal models, as well as from clinical studies, that link QS systems with human infections. We focus on two major QS bacterial models, the opportunistic Gram negative bacteria Pseudomonas aeruginosa and the Gram positive Staphylococcus aureus, which are also two of the main agents responsible of nosocomial and wound infections. In addition, QS communication systems in other bacterial, eukaryotic pathogens, and even immune and cancer cells are also reviewed, and finally, the new approaches proposed to combat bacterial infections by the attenuation of their QS communication systems and virulence are also discussed. | Israel Castillo-Juárez Toshinari Maeda Edna Ayerim Mandujano-Tinoco María Tomás Berenice Pérez-Eretza Silvia Julieta García-Contreras Thomas K Wood Rodolfo García-Contreras | 2015 | World Journal of Clinical Cases2015，3，7： | 15 |
| 5 | Mitochondrial protection by low doses of insulin-like growth factor-Ⅰin experimental cirrhosis显示文摘AIM: To characterize the mitochondrial dysfunction in experimental cirrhosis and to study whether insulin-like growth factor-Ⅰ(IGF-Ⅰ) therapy (4 wk) is able to induce beneficial effects on damaged mitochondria leading to cellular protection. METHODS: Wistar rats were divided into three groups: Control group, untreated cirrhotic rats and cirrhotic rats treated with IGF-Ⅰtreatment (2 μg/100 g bw/d). Mitochondrial function was analyzed by flow cytometry in isolated hepatic mitochondria, caspase 3 activation was assessed by Western blot and apoptosis by TUNEL in the three experimental groups. RESULTS: Untreated cirrhotic rats showed a mitochon- drial dysfunction characterized by a significant reduction of mitochondrial membrane potential (in status 4 and 3); an increase of intramitochondrial reactive oxigen species (ROS) generation and a significant reduction of ATPase activity. IGF-Ⅰtherapy normalized mitochondrial func-tion by increasing the membrane potential and ATPase activity and reducing the intramitochondrial free radical production. Activity of the electron transport complexes Ⅰand Ⅲ was increased in both cirrhotic groups. In addition, untreated cirrhotic rats showed an increase of caspase 3 activation and apoptosis. IGF-Ⅰtherapy reduced the expression of the active peptide of caspase 3 and resulted in reduced apoptosis. | Raquel Pérez María García-Fernández Matías Díaz-Sánchez Juan E Puche Gloria Delgado Marian Conchillo Jordi Muntané Inma Castilla-Cortázar | 2008 | World Journal of Gastroenterology2008，14，17： | 11 |
| 6 | Portal hypertensive biliopathy: A single center experience and literature review显示文摘Portal hypertensive biliopathy (PHB) is characterized by anatomical and functional abnormalities of the intrahepatic, extrahepatic and pancreatic ducts, in patients with portal hypertension associated to extrahepatic portal vein obstruction and less frequently to cirrhosis. These morphological changes, consisting in dilatation and stenosis of the biliary tree, are due to extensive venous collaterals occurring in an attempt to decompress the portal venous blockage. It is usually asymptomatic until it progresses to more advanced stages with cholestasis, jaundice, biliary sludge, gallstones, cholangitis and finally biliary cirrhosis. Imaging mo-dalities of the biliary tree such as Doppler ultrasound, computed tomography, magnetic resonance cholangiopancreatography and endoscopic retrograde cholangiopancreatography are essential to establish the diagnosis and the need of therapeutical interventions. Once the diagnosis is established, treatment with ursodesoxycholic acid seems to be beneficial. Decompression of the biliary tree to dilate, remove stones or implant biliary prosthesis by endoscopic or surgical procedures (hepato-yeyunostomy) usually resolves the cholestatic picture and prevents septic complications. The ideal treatment is the decompression of the portal system, with transjugular intrahepatic porto-systemic shunt or a surgical porto-systemic shunt. Unfortunately, few patients will be candidates for these procedures due to the extension of the thrombotic process. The purpose of this paper is to report the first 3 cases of PHB seen in a Colombian center and to review the literature. | Vanessa Suárez Andrés Puerta Luisa Fernanda Santos Juan Manuel Pérez Adriana Varón Rafael Claudino Botero | 2013 | World Journal of Hepatology2013，5，3： | 10 |
| 7 | Subclinical carotid atherosclerosis predicts all-cause mortality and cardiovascular events in obese patients with negative exercise echocardiography显示文摘BACKGROUND Obesity is a major health problem due to its high prevalence. The relationship between obesity and cardiovascular disease is unclear. Some studies agree that certain conditions associated with obesity, such as physical inactivity or cardiovascular risk factors, are responsible for cardiovascular risk excess among obese people. Carotid intima-media thickness and carotid plaques(CP) have been associated with cardiovascular adverse events in healthy populations, and recent data suggest a higher prevalence of subclinical carotid atherosclerosis in obese and metabolically unhealthy patients. However, there are no studies correlating subclinical atherosclerosis and adverse events(AE) in obese subjects.AIM To determine the association between carotid disease and AE in obese patients with negative exercise echocardiography(EE).METHODS From January 1, 2006 to December 31, 2010, 2000 consecutive patients with a suspicion of coronary artery disease were submitted for EE and carotid ultrasonography. Exclusion criteria included previous vascular disease, left ventricular ejection fraction < 50%, positive EE, significant valvular heart disease and inferior to submaximal EE. An AE was defined as all-cause mortality,myocardial infarction and cerebrovascular accident. Subclinical atherosclerosis was defined as CP presence according to Manheim and the American Society of Echocardiography Consensus.RESULTS Of the 652 patients who fulfilled the inclusion criteria, 226(34.7%) had body mass indexes ≥ 30 kg/m2, and 76 of them(33.6%) had CP. During a mean follow-up time of 8.2(2.1) years, 27 AE were found(11.9%). Mean event-free survival at 1, 5 and 10 years was 99.1%(0.6), 95.1%(1.4) and 86.5%(2.7), respectively. In univariate analysis, CP predicted AE [hazard ratio(HR) 2.52, 95% confidence interval(CI) 1.17-5.46; P = 0.019]. In multivariable analysis, the presence of CP remained a predictor of AE(HR 2.26, 95%CI 1.04-4.95, P = 0.041). Other predictors identified were glomerular filtration rate(HR 0.98, 95%CI 0.96-0.99; P= 0.023), peak metabolic equivalents(HR 0.83, 95%CI 0.70–0.99, P = 0.034) and moderate mitral regurgitation(HR 5.02, 95%CI 1.42–17.75, P = 0.012).CONCLUSION Subclinical atherosclerosis defined by CP predicts AE in obese patients with negative EE. These patients could benefit from aggressive prevention measures. | Rafael Vidal-Perez Raúl Franco-Gutiérrez Alberto J Pérez-Pérez Virginia Franco-Gutiérrez Alberto Gascón-Vázquez Andrea López-López Ana María Testa-Fernández Carlos González-Juanatey | 2019 | World Journal of Cardiology2019，11，1： | 7 |
| 8 | Timely reperfusion for ST-segment elevation myocardial infarction:Effect of direct transfer to primary angioplasty on time delays and clinical outcomes显示文摘Primary percutaneous coronary intervention(PPCI) is the preferred reperfusion therapy for patients presenting with ST-segment elevation myocardial infarction(STEMI) when it can be performed expeditiously and by experienced operators. In spite of excellent clinical results this technique is associated with longer delays than thrombolysis and this fact may nullify the benefit of selecting this therapeutic option. Several strategies have been proposed to decrease the temporal delays to deliver PPCI. Among them,prehospital diagnosis and direct transfer to the cath lab,by-passing the emergency department of hospitals,has emerged as anattractive way of diminishing delays. The purpose of this review is to address the effect of direct transfer on time delays and clinical events of patients with STEMI treated by PPCI. | Rodrigo Estévez-Loureiro ángela López-Sainz Armo Pérez de Prado Carlos Cuellas Ramón Calvio Santos Norberto Alonso-Orcajo Jorge Salgado Fernández Jose Manuel Vázquez-Rodríguez Maria López-Benito Felipe Fernández-Vázquez | 2014 | World Journal of Cardiology2014，6，6： | 6 |
| 9 | Recent Advances in Synthesis and Properties of Hybrid Halide Perovskites for Photovoltaics显示文摘The progress made by the scientific community in emerging photovoltaic technologies over the past two decades has been outstanding. Numerous methods have been developed for the preparation of hybrid organic–inorganic perovskite solar cells. The power conversion efficiency has been up to 14% by a one-step vacuum deposition technique. A serious concern is the toxicity of the materials. In this review, several methods aimed at resolving these problems to some extent have been compiled, including eco-friendly synthesis. Further efficiency enhancements are expected following optimization, and a better fundamental understanding of the internal electron charge transfer, electron–hole diffusion to the corresponding layers, flexibility, and stability-dependent bandgaps is reported. This paper explores the green synthesis of organic–inorganic perovskites for industrialization. Concerning the above facts, a simple low-cost model called‘‘dispersed photovoltaic cells' ' is presented. | C.C.Vidyasagar Blanca M.Muoz Flores Víctor M.Jimnez Prez | 2018 | Nano-Micro Letters2018，10，4： | 6 |
| 10 | Antioxidant role of heme oxygenase-1 in prehepatic portal hypertensive rats显示文摘瞄准:在氧化的肝地位和这项活动和表示上学习胆红素的效果他我在老鼠肝损伤的 oxygenase-1 (HO-1 ) 由 prehepatic 门静脉高血压导致了。方法:Wistar 雄的老鼠,称 200-250 g,在随机被划分成二个组:有调整 prehepatic 门静脉结扎(PPVL ) 导致的 prehepatic 门静脉高血压(PH ) 的一个组和另外的组对应于假冒的操作老鼠。门压力,氧化压力参数,抗氧化剂酶, HO-1 活动和表示和肝的正弦曲线血管舒张被测量。结果:在 PPVL 老鼠,氧化应力被在减少的谷胱甘肽(GSH ) 的反应物质(TBARS ) 内容和减少铺平的 thiobarbituric 酸的显著增加证实。当 HO-1 的活动和表示被提高时,肝抗氧化剂酶,超级氧化物歧化酶(草皮) ,过氧化氢酶(猫) 和谷胱甘肽过氧化物酶(GSH-Px ) 的活动也被减少。胆红素(5 mumol/kg 体重) 的管理在实验的结束前的 24 h 完全阻止了所有这些效果。有 Sn-protoporphyrin IX (Sn-PPIX ) 的预告的处理(100 mug/kg 体重, i.p ) ,一个有势力禁止者惊讶,完全废除了氧化压力并且每氧化象类脂化合物的增加一样在肝 GSH 层次挑起了细微减少。而且,一氧化碳,另一他我分解代谢的产品,在在 PPVL 的肝的区域组织的正弦曲线导致了重要增加。有 Sn-PPIX 的 PPVL 老鼠的预告的处理完全阻止了这效果。结论:这些结果在 prehepatic 门 hypertensive 老鼠在表示上建议 HO-1 的一个有益的角色。 | Soledad Gonzales María Julia Pérez Juan C Perazzo María Luján Tomaro | 2006 | World Journal of Gastroenterology2006，12，26： | 6 |
| 11 | Chemical oxygen demand reduction in coffee wastewater through chemical flocculation and advanced oxidation processes显示文摘在通过化学凝结絮凝和先进氧化过程( AOP )的咖啡 processingwastewater 在场的自然有机物的移动用商业凝聚剂 andUV/H2O2 , UV/O3 和 UV/H2O2/O3 有自然有机物的移动的 beenstudied.The 有效性过程在 theseprocesses 的酸的 conditions.For 各个下面被决定,不同运作的条件被探索优化 thecoffee wastewater.Coffee 废水的处理效率是 | ZAYAS Pérez Teresa GEISSLER Gunther HERNANDEZ Fernando | 2007 | Journal of Environmental Sciences2007，19，3： | 6 |
| 12 | Evaluation of p53 codon 72 polymorphism in adenocarcinomas of the colon and rectum in La Plata, Argentina显示文摘瞄准:为了评估在 p53 之间的潜在的协会,在 72 上哄骗多型性和分散的颜色表面的腺癌发展,和人的乳头状瘤病毒(HPV ) 感染。方法:一个 -- 有来自 La Plata 的城市的结肠癌的 109 控制和 53 个病人,阿根廷被分析。72 遗传型和 HPV 感染上的 p53 鳕鱼用等位基因特定的聚合酶链反应被识别并且分别地嵌套聚合酶链反应。结果:在在盒子和控制之间的 72 多型性上的 p53 鳕鱼的分发的差别是统计上重要的。精氨酸等位基因在控制有 0.65 的流行并且 0.77 在情况中。为同型结合的精氨酸遗传型的相应机会比率是 2.08 (95% CI, 1.06-4.05;P<0.05 ) 。协会的缺乏在腺癌的集合在 p53 多型性和 HPV 感染之间被发现。结论:现在的学习的调查结果在同型结合的遗传型可以代表的 72 精氨酸上显示那条 p53 鳕鱼为结肠癌开发的一个基因预先安排因素。然而,进一步的研究被需要以便阐明在颜色的 72 多型性上的 p53 鳕鱼的角色表面的癌症。 | Luis Orlando Pérez Martin Carlos Abba Fernando Noel Dulout Carlos Daniel Golijow | 2006 | World Journal of Gastroenterology2006，12，9： | 5 |
| 13 | Hyperphosphatemia after sodium phosphate laxatives in low risk patients:Prospective study显示文摘AIM:To establish the frequency of hyperphosphate-mia following the administration of sodium phosphate laxatives in low-risk patients. METHODS:One hundred consecutive ASAⅠ-Ⅱindividuals aged 35-74 years,who were undergoing colonic cleansing with oral sodium phosphate(OSP) before colonoscopy were recruited for this prospective study.Exclusion criteria:congestive heart failure, chronic kidney disease,diabetes,liver cirrhosis,intestinal obstruction,decreased bowel motility,increased bowel permeability,and hyperparathyroidism.The day before colonoscopy,all the participants entered a 24-h period of diet that consisted of 4 L of clear fluids with sugar or honey and 90 mL(60 g)of OSP in two 45-mL doses,5 h apart.Serum phosphate was measured before and after the administration of the laxative. RESULTS:The main demographic data(mean±SD) were:age,58.9±8.4 years;height,163.8±8.6 cm; weight,71±13 kg;body mass index,26±4;women, 66%.Serum phosphate increased from 3.74±0.56 to 5.58±1.1 mg/dL,which surpassed the normal value (2.5-4.5 mg/dL)in 87%of the patients.The highest serum phosphate was 9.6 mg/dL.Urea and creatinine remained within normal limits.Post-treatment OSP se-rum phosphate concentration correlated inversely with glomerular filtration rate(P<0.007,R 2=0.0755),total body water(P<0.001,R 2=0.156)and weight(P< 0.013,R 2=0.0635). CONCLUSION:In low-risk,well-hydrated patients, the standard dose of OSP-laxative-induced hyperphos-phatemia is related to body weight. | Marcela Noemi Casais Guillermo Rosa-Diez Susana Pérez Elina Noemi Mansilla Susana Bravo Francisco Carlos Bonofiglio | 2009 | World Journal of Gastroenterology2009，15，47： | 5 |
| 14 | 21世纪心电图在临床与科研中的作用显示文摘心电学是心脏病学的一个分支,其主要研究心脏的电活动。经典的12导联心电图通过体表12个位置的探查电极记录心脏的电活动。心电图机是记录心电活动的装置,内置的生物电放大器可以放大各种生物电信号,电流计根据心肌的除极、复极事件进行相应的移动从而描记出心电图. | 张莉 André s Ricardo Pé rez Riera Peter R. Kowey 刘元伟(译) | 2008 | 临床心电学杂志2008，17，6： | 5 |
| 15 | Glutathione depleting drugs, antioxidants and intestinal calcium absorption显示文摘Glutathione(GSH) is a tripeptide that constitutes one of the main intracellular reducing compounds. The normal content of GSH in the intestine is essential to optimize the intestinal Ca2+ absorption. The use of GSH depleting drugs such as DL-buthionine-S,R-sulfoximine, menadione or vitamin K3, sodium deoxycholate or diets enriched in fructose, which induce several features of the metabolic syndrome, produce inhibition of the intestinal Ca2+ absorption. The GSH depleting drugs switch the redox state towards an oxidant condition provoking oxidative/nitrosative stress and inflammation, which lead to apoptosis and/or autophagy of the enterocytes. Either the transcellular Ca2+ transport or the paracellular Ca2+ route are altered by GSH depleting drugs. The gene and/or protein expression of transporters involved in the transcellular Ca2+ pathway are decreased. The flavonoids quercetin and naringin highly abrogate the inhibition of intestinal Ca2+ absorption, not only by restoration of the GSH levels in the intestine but also by their anti-apoptotic properties. Ursodeoxycholic acid, melatonin and glutamine also block the inhibition of Ca2+ transport caused by GSH depleting drugs. The use of any of these antioxidants to ameliorate the intestinal Ca2+ absorption under oxidant conditions associated with different pathologies in humans requires more investigation with regards to the safety, pharmacokinetics and pharmacodynamics of them. | Luciana Moine María Rivoira Gabriela Díaz de Barboza Adriana Pérez Nori Tolosa de Talamoni | 2018 | World Journal of Gastroenterology2018，24，44： | 5 |
| 16 | Gallstone ileus:One-stage surgery in a patient with intermittent obstruction显示文摘Gallstone ileus, an uncommon complication of cholelithiasis, is described as a mechanical intestinal obstruction due to impaction of one or more large gallstones within the gastrointestinal tract. The clinical presentation is variable, depending on the site of obstruction, manifested as acute, intermittent or chronic episodes. A 51-year-old female patient was referred to our hospital with 3 events of intestinal obstruction during the previous 7 d. At admission, there were clinical signs of intestinal obstruction; abdominal film demonstrated dilated bowel loops, air-fluid levels and a vague image of a stone in the inferior left quadrant. Once stabilized, a laparotomy was performed. Surgical findings were distention of the jejunum and ileum proximal to a palpable stone in the ileum as well as gallstones and a cholecystoduodenal fistula in the gallbladder. An enterolithotomy, repair of the cholecystoduodenal fistula and cholecystectomy were performed. The postoperative course was uneventful. There is no uniform surgical procedure for this disease. When the patient is too ill or when biliary surgery is not advisable, an enterolithotomy is the best option. The one-stage procedure should be the offered to adequately stabilized patients when local and general conditions, such as good cardiorespiratory and metabolic reserve permit a more prolonged surgical procedure. | Carlos M Nuo-Guzmán José Arróniz-Jáuregui Pável A Moreno-Pérez édgar A Chávez-Solís Nereida Esparza-Arias Cuauhtémoc I Hernández-González | 2010 | World Journal of Gastrointestinal Surgery2010，2，5： | 5 |
| 17 | Single-atom heterogeneous catalysts based on distinct carbon nitride scaffolds显示文摘Carbon nitrides integrating macroheterocycles offer unique potential as hosts for stabilizing metal atoms due to their rich electronic structure. To date, only graphitic heptazine-based polymers have been studied.Here, we demonstrate that palladium atoms can be effectively isolated on other carbon nitride scaffolds including linear melem oligomers and poly(triazine/heptazine imides). Increased metal uptake was linked to the larger cavity size and the presence of chloride ions in the polyimide structures. Changing the host structure leads to significant variation in the average oxidation state of the metal, which can be tuned by exchange of the ionic species as evidenced by X-ray photoelectron spectroscopy and supported by density functional theory. Evaluation in the semi-hydrogenation of 2-methyl-3-butyn-2-ol reveals an inverse correlation between the activity and the degree of oxidation of palladium, with oligomers exhibiting the highest activity. These findings provide new mechanistic insights into the influence of the carbon nitride structure on metal stabilization. | Zupeng Chen Evgeniya Vorobyeva Sharon Mitchell Edvin Fako Núria López Sean M.Collins Rowan K.Leary Paul A.Midgley Roland Hauert Javier Pérez-Ramírez | 2018 | National Science Review2018，5，5： | 4 |
| 18 | Red pigment production by Penicillium purpurogenum GH2 is influenced by pH and temperature显示文摘The combined effects of pH and temperature on red pigment production and fungal morphology were evaluated in a submerged culture of Penicillium purpurogenum GH2, using Czapek-Dox media with D-xylose as a carbon source. An experimental design with a factorial fix was used: three pH values (5, 7, and 9) and two temperature levels (24 and 34 °C) were evaluated. The highest production of red pigment (2.46 g/L) was reached with a pH value of 5 and a temperature of 24 °C. Biomass and red pigment production were not directly associated. This study demon- strates that P. purpurogenum GH2 produces a pigment of potential interest to the food industry. It also shows the feasibility of producing and obtaining natural water-soluble pigments for potential use in food industries. A strong combined effect (p<0.05) of pH and temperature was associated with maximal red pigment production (2.46 g/L). | Alejandro MéNDEZ Catalina PéREZ Julio Cesar MONTAéZ Gabriela MARTíNEZ Cristóbal Noé AGUILAR | 2011 | Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2011，12，12： | 4 |
| 19 | Intestinal pseudo-obstruction caused by herpes zoster:Case report and pathophysiology显示文摘Herpes zoster(HZ) infection occurs in approximately 10% to 30% of individuals. Visceral neuropathies secondary to HZ can cause cystitis and urinary retention. But colonic pseudo-obstruction can also occur. Peripheral neuropathy may reveal segmental motor paresis of either upper or lower limbs, the abdominal muscles or the diaphragm. We report the case of a 62-year-old male patient who presented with abdominal distention and cutaneous vesicular eruption on the left side of the abdominal wall. Plain X-rays and computed tomography scan showed distended small bowel. A diagnosis of intestinal pseudo-obstruction was made secondary to segmental paresis of the small intestine and visceral neuropathy. Conservative management was successful and the patient was discharged uneventfully. Intestinal pseudo-obstruction ought to be consideredwhen dealing with non-obstructive(adynamic) conditions of the digestive tract associated with HZ infection; since early recognition may help to avoid unnecessary surgery. | Roberto Anaya-Prado José V Pérez-Navarro Ana Corona-Nakamura Michelle M Anaya-Fernández Roberto Anaya-Fernández Marian Eliza Izaguirre-Pérez | 2018 | World Journal of Clinical Cases2018，6，6： | 4 |
| 20 | Heat Transfer in Steelmaking Ladle显示文摘The heat transfer in a steelmaking ladle was studied. The evaluation of heat transfer of the steel was performed by measuring steel temperature in points including all refining steel process. In the ladle, the temperatures in the refractories and the shell were also measured. To evaluate the thermal profile between the hot and cold faces of the ladle in the slag line position, an experiment which shows the importance of thermal contact resistance was carried out. Higher heat losses in the tapping and the vacuum were verified. The temperature measurements of the ladle indicate distinct thermal profiles in each stage of steel refining. Moreover, as each stage of the process depends on the previous one, the complexity of the ladle thermal control is incremental. So a complete model of heat losses in the ladle is complex. | André Zimmer lvaro Niedersberg Correia Lima Rafael Mello Trommer Saulo Roca Bragana Carlos Pérez Bergmann | 2008 | Journal of Iron and Steel Research(International)2008，15，3： | 4 |
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