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    题名 作者 年代 出处 被引量
1深度学习在设备故障预测与健康管理中的应用显示文摘在智能制造背景下,大数据驱动的设备故障预测与健康管理日益受到各界重视。深度学习能够在层次结构的特征提取过程中发现更多的隐藏知识,在领域自适应方面具有良好的数据适应性,近年来逐渐成为设备故障预测与健康管理的研究热点,并在设备故障诊断和预测中得到了广泛的应用。通过系统回顾近年来深度学习在设备故障预测与健康管理中应用,总结、分类和解释关于这一热点主题的主要文献,讨论了各种体系结构和相关理论。在此基础上,阐述了深度学习在设备故障诊断和预测方面所取得的主要成果、面临的挑战、以及未来的发展趋势,为设备故障预测与健康管理领域选择、设计或实现深度学习架构,提供明确的方向。陈志强 陈旭东 JoséValente de Olivira 李川 2019仪器仪表学报2019,40,9:67
2Glycated hemoglobin and antidiabetic strategies as risk factors for hepatocellular carcinoma显示文摘AIM: To evaluate the relationship between glycemic control [assessed by glycated hemoglobin (HbA1c)], antidiabetic therapies and the risk of hepatocellular carcinoma (HCC).METHODS: We recruited 465 patients with HCC, 618 cases with liver cirrhosis and 490 controls with no liver disease. Among subjects with type 2 diabetes mellitus (DM2), the associations between the antidiabetic strategies and HbA1c level with HCC were determined through 2 series of multivariate logistic regression models using cirrhotic patients and controls as comparison groups. RESULTS: DM2 prevalence was 31.2% in patients with HCC, 23.2% in cirrhotic patients and 12.6% in controls (P < 0.0001). In 86% of study subjects, DM2 had been diagnosed for more than 1 year before the HCC diagnosis. HCC patients with DM2 had a 1.52.5fold increased risk of liver cancer. The HbA1c mean levels were signif icantly higher in DM2 patients with HCC than in cirrhoticand control DM2 patients. Antidiabetic treatment with metformin was more common among cirrhotic and control DM2 subjects than among cases with HCC. In both series of multivariate analyses, treatment with metformin signif icantly reduced the risk of HCC by more than 80% compared with sulphonylureas and insulin therapy. No signif icant differences were seen between sulphonylureas and insulin treatment. Elevated HbA1c levels were positively related to the risk for HCC in diabetic patients, with a 26%50% increase in risk for each 1% increase in HbA1c values.CONCLUSION: In patients with preexisting DM2, the risk of HCC is positively associated with poor chronic glycemic control and significantly decreased by metformin therapy.Valter Donadon Massimiliano Balbi Francesca Valent Angelo Avogaro 2010World Journal of Gastroenterology2010,16,24:15
3Systematic review of health-related quality of life after esophagectomy for esophageal cancer显示文摘This study is aimed to assess the long-term health-related quality of life(HRQL) of patients after esopha-gectomy for esophageal cancer in comparison with es-tablished norms,and to evaluate changes in HRQL during the different stages of follow-up after esopha-geal resection. A systematic review was performed bysearching medical databases(Medline,Embase andthe Cochrane Library) for potentially relevant studiesthat appeared between January 1975 and March 2011.Studies were included if they addressed the questionof HRQL after esophageal resection for esophage alcancer. Two researchers independently performed the study selection,data extraction and analysis processes.Twenty-one observational studies were included witha total of 1282(12-355) patients. Five studies were performed with short form-36(SF-36) and 16 with European Organization for Research and Treatment of Cancer(EORTC) QLQ C30(14 of them also utilized the disease-specific OES18 or its previous version OES24) .The analysis of long-term generic HRQL with SF-36showed pooled scores for physical,role and socialfunction after esophagectomy similar to United Statesnorms,but lower pooled scores for physical function,vitality and general health perception. The analysis of HRQL conducted using the Global EORTC C30 globalscale during a 6-mo follow-up showed that global scaleand physical function were better at the baseline. The symptom scales indicated worsened fatigue,dyspneaand diarrhea 6 mo after esophagectomy. In contrast,however,emotional function had significantly improved after 6 mo. In conclusion,short- and long-term HRQLis deeply affected after esophagectomy for cancer. The impairment of physical function may be a long-termconsequence of esophagectomy involving either the respiratory system or the alimentary tract. The short-and long-term improvement in the emotional function of patients who have undergone successful operationsmay be attributed to the impression that they have survived a near-death experience.Marco Scarpa Stefano Valente Rita Alfieri Matteo Cagol Giorgio Diamantis Ermanno Ancona Carlo Castoro 2011World Journal of Gastroenterology2011,17,42:15
4Nasogastric or nasointestinal feeding in severe acute pancreatitis显示文摘AIM:To assess the rate of spontaneous tube migration and to compare the effects of naso-gastric and nasointestinal(NI)(beyond the ligament of Treitz) feeding in severe acute pancreatitis(SAP).METHODS:After bedside intragastric insertion,tube position was assessed,and enteral nutrition(EN) started at day 4,irrespective of tube localization.Patients were monitored daily and clinical and laboratory parameters evaluated to compare the outcome of patients with nasogastric(NG) or NI tube.RESULTS:Spontaneous tube migration to a NI site occurred in 10/25(40%) prospectively enrolled SAP patients,while in 15(60%) nutrition was started with a NG tube.Groups were similar for demographics and pancreatitis aetiology but computed tomography(CT) severity index was higher in NG tube patients than in NI(mean 6.2 vs 4.7,P=0.04).The CT index seemed a risk factor for failed obtainment of spontaneous distal migration.EN trough NG or NI tube were similar in terms of tolerability,safety,clinical goals,complications and hospital stay.CONCLUSION:Spontaneous distal tube migration is successful in 40% of SAP patients,with higher CT severity index predicting intragastric retention;in such cases EN by NG tubes seems to provide a pragmatic alternative opportunity with similar outcomes.Matteo Piciucchi Elettra Merola Massimo Marignani Mari-anna Signoretti Roberto Valente Lucia Cocomello Flavia Baccini Francesco Panzuto Gabriele Capurso Gianfranco Delle Fave 2010World Journal of Gastroenterology2010,16,29:13
5Simultaneous intraductal papillary neoplasms of the bile duct and pancreas treated with chemoradiotherapy显示文摘Some authors have suggested that intraductal papillary mucinous neoplasms of the bile duct(IPMN-B) could be the the biliary counterpart of IPMN of the pancreas(IPMN-P) since they share several clinical-pathological features.These include prominent intraductal papil-lary proliferation pattern,a gastrointestinal phenotype,frequent mucin hyper-secretion and progression to mu-cinous carcinoma.To date there are just four reported cases of patients with synchronous IPMN-B and IPMN-P all of which were treated surgically.We hereby report the case of a 76-year-old woman who was incidentally diagnosed with both an asymptomatic 3 cm bulky uid lesion obstructing the bile duct lumen,diagnosed as a malignant IPMN-B,and synchronous multiple pancreatic cystic lesions(10-13 mm) communicating with an irreg-ular Wirsung,diagnosed as branch duct IPMN-P.Since surgery was ruled-out because of the patient's age and preferences,she underwent a conservative manage-ment regimen comprising both chemotherapy and radio-therapy.This was effective in decreasing the mass size and in resolving subsequent jaundice.This is also the f irst reported case of IPMN-B successfully treated with chemoradiotherapy.Clinicians should consider medical treatment as an option in this clinical scenario,in pa-tients who may be unf it for surgery.Roberto Valente Gabriele Capurso Paola Pierantognetti Elsa Iannicelli Matteo Piciucchi Adriana Romiti Paolo Mercantini Alberto Larghi Giulia Francesca Federici Viola Barucca Maria Falchetto Osti Emilio Di Giulio Vincenzo Ziparo Gianfranco Delle Fave 2012World Journal of Gastrointestinal Oncology2012,4,2:13
6Clinical significance of lactate in acute cardiac patients显示文摘Lactate, as a metabolite of easy and quick assessment, has been studied over time in critically ill patients in order to evaluate its prognostic ability. The present review is focused on the prognostic role of lactate levels in acute cardiac patients(that is with acute coronary syndrome, cardiogenic shock, cardiac arrest, non including post cardiac surgery patients). In patients with STelevation myocardial infarction treated with mechanical revascularization, hyperlactatemia identified a subset of patients at higher risk for early death and in-hospital complications, being strictly related mainly to hemodynamic derangement. The prognostic impact of hyperlactatemia on mortality has been documented in patients with cardiogenic shock and in those with cardiac arrest even if there is no cut-off value of lactate to be associated with worse outcome or to guide resuscitation or hemodynamic management. Therapeutic hypothermia seems to affect per se lactate values which have been shown to progressively decrease during hypothermia. The mechanism(s) accounting for lactate levels during hypothemia seem to be multiple ranging from the metabolic effects of reduced temperatures to the hemodynamic effects of hypothermia(i.e., reduced need of vasopressor agents). Serial lactate measurements over time, or lactate clearance, have been reported to be clinically more reliable than lactate absolute value also in acute cardiac patients. Despite differences in study design, timing of lactate measurements and type of acute cardiac conditions(i.e., cardiogenic shock, cardiac arrest, refractory cardiac arrest), available evidence strongly suggests that higher lactate levels can be observed on admission in non-survivors and that higher lactate clearance is associated with better outcome.Chiara Lazzeri Serafina Valente Marco Chiostri Gian Franco Gensini 2015World Journal of Cardiology2015,7,8:10
7Bone marrow-derived mesenchymal stem cells versus adipose-derived mesenchymal stem cells for peripheral nerve regeneration显示文摘Studies have confirmed that bone marrow-derived mesenchymal stem cells(MSCs) can be used for treatment of several nervous system diseases. However, isolation of bone marrow-derived MSCs(BMSCs) is an invasive and painful process and the yield is very low. Therefore, there is a need to search for other alterative stem cell sources. Adipose-derived MSCs(ADSCs) have phenotypic and gene expression profiles similar to those of BMSCs. The production of ADSCs is greater than that of BMSCs, and ADSCs proliferate faster than BMSCs. To compare the effects of venous grafts containing BMSCs or ADSCs on sciatic nerve injury, in this study, rats were randomly divided into four groups: sham(only sciatic nerve exposed), Matrigel(MG; sciatic nerve injury + intravenous transplantation of MG vehicle), ADSCs(sciatic nerve injury + intravenous MG containing ADSCs), and BMSCs(sciatic nerve injury + intravenous MG containing BMSCs) groups. Sciatic functional index was calculated to evaluate the function of injured sciatic nerve. Morphologic characteristics of nerves distal to the lesion were observed by toluidine blue staining. Spinal motor neurons labeled with Fluoro-Gold were quantitatively assessed. Compared with sham-operated rats, sciatic functional index was lower, the density of small-diameter fibers was significantly increased, and the number of motor neurons significantly decreased in rats with sciatic nerve injury. Neither ADSCs nor BMSCs significantly improved the sciatic nerve function of rats with sciatic nerve injury, increased fiber density, fiber diameters, axonal diameters, myelin sheath thickness, and G ratios(axonal diameter/fiber diameter ratios) in the sciatic nerve distal to the lesion site. There was no significant difference in the number of spinal motor neurons among ADSCs, BMSCs and MG groups. These results suggest that neither BMSCs nor ADSCs provide satisfactory results for peripheral nerve repair when using MG as the conductor for engraftment.Marcela Fernandes Sandra Gomes Valente Rodrigo Guerra Sabongi Joao Baptista Gomes dos Santos Vilnei Mattioli Leite Henning Ulrich Arthur Andrade Nery Maria José da Silva Fernandes 2018Neural Regeneration Research2018,13,1:10
8Fatty liver disease in severe obese patients:Diagnostic value of abdominal ultrasound显示文摘AIM:To evaluate the sensitivity and specificity of abdominal ultrasound (US) for the diagnosis of hepatic steatosis in severe obese subjects and its relation to histological grade of steatosis. METHODS: A consecutive series of obese patients, who underwent bariatric surgery from October 2004 to May 2005, was selected. Ultrasonography was performed in all patients as part of routine preoperative time and an intraoperative wedge biopsy was obtained at the beginning of the bariatric surgery. The US and histological findings of steatosis were compared, considering histology as the gold standard. RESULTS: The study included 105 patients. The mean age was 37.2 ± 10.6 years and 75.2% were female. The histological prevalence of steatosis was 89.5%. The sensitivity and specificity of US in the diagnosis of hepatic steatosis were, respectively, 64.9% (95% CI: 54.9-74.3) and 90.9% (95% CI: 57.1-99.5). The positive predictive value and negative predictive value were, respectively, 98.4% (95% CI: 90.2-99.9) and 23.3% (95% CI: 12.3-39.0). The presence of steatosis onUS was associated to advanced grades of steatosis on histology (P = 0.016). CONCLUSION: Preoperative abdominal US in our series has not shown to be an accurate method for the diagnosis of hepatic steatosis in severe obese patients. Until another non-invasive method demonstrates better sensitivity and specificity values, histological evaluation may be recommended to these patients undergoing bariatric surgery.Alessandro de Moura Almeida Helma Pinchemel Cotrim Daniel Batista Valente Barbosa Luciana Gordilho Matteoni de Athayde Adimeia Souza Santos Almir Galvo Vieira Bitencourt Luiz Antonio Rodrigues de Freitas Adriano Rios Erivaldo Alves 2008World Journal of Gastroenterology2008,14,9:10
9Identification of CD13,CD107a,and CD164 as novel basophil-activation markers and dissection of two response patterns in time kinetics of IgE-de-pendent upregulation显示文摘Using two-colour flow cytometry >200 antibodies submitted to the 8th International Workshop of Human Leukocyte Differentiation Antigens (HLDA8) have been analyzed for their reactivity with resting and activated CD203c+ basophils. Four antibodies either non-reactive or weakly reactive with resting basophils exhibited an increased reactivity with basophils activated by anti-IgE-mediated cross-linking of the high affinity IgE receptor (FcεRI). These include antibod- ies against CD164 (WS-80160, clone N6B6 and WS-80162, clone 67D2), as well as two reagents with previously unknown specificities that were identified as CD13 (WS-80274, clone A8) and CD107a (WS-80280, clone E63-880). The activation patterns followed either the “CD203c-like” or “CD63-like” activation profile. The CD203c profile is characterized by a rapid and significant upregulation (of CD13, CD164, and CD203c), reaching maximum levels after 5- 15 min of stimulation. The phosphoinositide-3-kinase (PI3K)-specific inhibitor wortmannin inhibited the upregulation of these markers whereas 12-O-tetradecanoyl-phorbol-13-acetate (TPA) induced a rapid and FcεRI-independent upregulation within 1-2 min. In the CD63 profile, maximum upregulation (of CD63 and CD107a) was detected only after 20-40 min, and upregulation by TPA reached maximum levels after 60 min. In summary, our data identify CD13, CD107a, and CD164 as novel basophil-activation antigens. Based on time kinetics of upregulation, we hypothesize that molecules of the “CD203c group” and the “CD63 group” are linked to two different mechanisms of basophil activation.Florian HENNERSDORF Stefan FLORIAN Andreas JAKOB Katharina BAUMGRTNER Karoline SONNECK Alfred NORDHEIM Tilo BIEDERMANN Peter VALENT Hans-Jrg BüHRING 2005Cell Research2005,15,5:9
10Comment on “Chen et al., Fabrication and photovoltaic conversion enhancement...”,Electrochimica Acta,2014显示文摘In a recent article, Chen et al. [Electrochimica Acta, 2014, 130: 279] presented their fabrication and characterization results on a graphene/n-Si solar cell where the Au nanoparticles were inserted in graphene to increase its optical and electrical properties. The higher efficiency of the device was attributed to increased conductivity of graphene after doping with Au nanoparticles. However, the knowledge in the field of Schottky diode solar cells relates this to increased band bending at the junction. Also, to explain the instability behaviour, they concluded that the growth of silicon oxide on the Si surface or oxygen adsorption on the window layer resulted in the device performance increasing initially and decreasing in the end. However, this instability seems to be due to variation in series resistance reduced at the beginning because of slightly lowered Fermi level and increased at the end by the self-compensation by deep in-diffusion of Au nanoparticles into n-Si layer. We also propose that inserting a very thin p-type layer at the junction will enhance the carrier collection and performance of this device.Lara Valentic Nima E.Gorji Department of Environment Sciences,University of Nova Gorica Department of Physics,Brown University 2015Journal of Semiconductors2015,36,9:6
11水稻抗稻瘟病菌防卫反应的细胞学分析与防卫基因表达显示文摘对水稻类病变坏死突变体lmm1(LmmKaty)与原亲本及双单倍体YT14和YT16接种稻瘟病菌24h内的抗病反应、细胞学和分子作用机理进行了研究。人工接种实验表明,与原亲本相比,该突变体对稻瘟病菌具有更强的抗性。突变体接种20~24h后,自动荧光检测到细胞死亡,而对照则未检测到。表明该突变体通过细胞程序性死亡阻止稻瘟病菌的蔓延,从而提高了抗病性。Northernblotting结果发现,抗病品系YT14中的防卫相关基因、苯丙氨酸解氨酶基因和β-葡聚糖酶基因在人工接种稻瘟病菌6h后开始表达,16~24h后上述基因表达量快速增加;而病程相关蛋白基因PR-1和几丁质酶基因在人工接种稻瘟病菌24h后才开始表达。与YT14相比,感病品系中上述基因的表达明显延迟。表明在人工接种稻瘟病菌24h内水稻可启动抗病防卫反应,从而对稻瘟病菌产生抗性。王忠华 林卉 Barbara VALENT J.Neil RUTGER 贾育林 2007中国水稻科学2007,21,4:5
12Evaluation of the Ex-PRESS~ P-50 implant under scleral flap in combined cataract and glaucoma surgery显示文摘AIM: To evaluate the efficacy and safety of glaucoma drainage device Ex-PRESS~ P-50 for combined cataract surgery and glaucoma.·METHODS: Patients having cataract and open angle glaucoma or patients with open advanced glaucoma which needed two or more antiglaucoma medications were included. Combined cataract surgery and glaucoma with Ex-PRESS~ P-50 model placed under scleral flap was performed.·RESULTS: Out of 40 eyes of 40 patients(55% male and45% female) completed the study during one-year follow-up. The mean of age was 76.6 ±11.02 y. The intraocular pressure(IOP) decreased significantly during the 12-month follow-up from 23.5 mm Hg to 16.8 mm Hg(Wilcoxon signed ranks test, P <0.001). A 59.5% of patients did not need any topical treatment, 10.8% of them needed one active principle, 27% needed two active principles, and 2.7% of them needed three active principles for successful IOP control(<21 mm Hg).·CONCLUSION:Combinedsurgeryofphacoemulsification with Ex PRESS~ P-50 lowers IOP from the preoperative baseline and reduces significantly the number of antiglaucoma active principles for IOP control after the operation.Valentín Huerva Jordi Soldevila Francisco J.Ascaso Laura Lavilla M.Jesús Muniesa M.Carmen Sánchez 2016International Journal of Ophthalmology(English edition)2016,9,4:5
13Prevalence of Helicobacter pylori infection and intestinal metaplasia in subjects who had undergone surgery for gastric adenocarcinoma in Northwest Italy显示文摘AIM: To investigate the seroprevalence of Helicobacter pylori(H pylorri) infection and its more virulent strains as well as the correlation with the histologic features among patients who had undergone surgery for gastric cancer (GC).METHODS: Samples from 317 (184 males, 133females, mean age 69±3.4 years) consecutive patients who had undergone surgery for gastric non-cardia adenocarcinoma were included in the study. Five hundred and fifty-five (294 males, 261 females, mean age 57.3±4.1 years) patients consecutively admitted to the Emergency Care Unit served as control. Histological examination of tumor, lymph nodes and other tissues obtained at the time of surgery represented the diagnostic 'gold standard'. An enzyme immunosorbent assay was used to detect serum anti-H pylori(IgG)antibodies and Western blotting technique was utilized to search for anti-CagA protein (IgG).RESULTS: Two hundred and sixty-one of three hundred and seventeen (82.3%) GC patients and 314/555 (56.5%)controls were seropositive for anti-H pylori (P<0.0001;OR, 3.58; 95%CI, 2.53-5.07). Out of the 317 cases, 267(84.2%) were seropositive for anti-CagA antibody vs 100 out of 555 (18%) controls (P<0.0001; OR, 24.30;95%CI, 16.5-35.9). There was no difference between the frequency of H pyloriin intestinal type carcinoma (76.2%) and diffuse type cancer (78.8%). Intestinal metaplasia (IM) was more frequent but not significant in the intestinal type cancer (83.4% vs 75.2% in diffuse type and 72.5% in mixed type). Among the patients examined for IM, 39.8% had IM type Ⅰ, 8.3% type Ⅱ and 51.9% type Ⅲ (type Ⅲ vs others, P = 0.4).CONCLUSION; This study confirms a high seroprevalence of H pyloriinfection in patients suffering from gastric adenocarcinoma and provides further evidence that searching for CagA status over H pylori infection might confer additional benefit in identifying populations at greater risk for this tumor.Giorgio Palestro Rinaldo Pellicano Gian Ruggero Fronda Guido Valente Marco De Giuli Tito Soldati Agostino Pugliese Stefano Taraglio Mauro Garino Donata Campra Miguel Angel Cutufia Elena Margaria Giancarlo Spinzi Aldo Ferrara Giorgio Marenco Mario Rizzetto Antonio Ponzetto 2005World Journal of Gastroenterology2005,11,45:5
14Endoscopy-guided ablation of pancreatic lesions:Technical possibilities and clinical outlook显示文摘Endoscopic ultrasound(EUS) and endoscopic retrograde cholangiopancreatography(ERCP)-guided ablation procedures are emerging as a minimally invasive therapeutic alternative to radiological and surgical treatments for locally advanced pancreatic cancer(LAPC), pancreatic neuroendocrine tumours(PNETs), and pancreatic cystic lesions(PCLs). The advantages of treatment under endoscopic control are the real-time imaging guidance and the possibility to reach a deep target like the pancreas. Currently, radiofrequency probes specifically designed for ERCP or EUS ablation are available as wel as hybrid cryotherm probe combining radiofrequency with cryotechnology. To date, many reports and case series have confirmed the safety and feasibility of that kind of ablation technique in the pancreatic setting.Moreover, EUS-guided fine-needle injection is emerging as a method to deliver ablative and anti-tumoral agents inside the tumuor. Ethanol injection has been proposed mostly for the treatment of PCLs and for symptomatic functioning PNETs, and the use of gemcitabine and paclitaxel is also interesting in this setting. EUS-guided injection of chemical or biological agents including mixed lymphocyte culture, oncolytic viruses, and immature dendritic cells has been investigated for the treatment of LAPC. Data on the long-term efficacy of these approaches,and large prospective randomized studies are needed to confirm the real clinical benefits of these techniques for the management of pancreatic lesions.Marianna Signoretti Roberto Valente Alessandro Repici Gianfranco Delle Fave Gabriele Capurso Silvia Carrara 2017World Journal of Gastrointestinal Endoscopy2017,9,2:5
15恶性腹膜间皮瘤组织学分级系统具有预后意义显示文摘恶性间皮瘤是一种可起源于胸膜、腹膜、鞘膜及心包膜等浆膜层的罕见肿瘤,多数发生于胸膜,其次发生于腹膜,预后较差。恶性间皮瘤的组织学亚型主要包括上皮样型、肉瘤样型和双相型,其中最常见的亚型是上皮样型。恶性腹膜间皮瘤起源于腹膜浆膜层,虽然其与恶性胸膜问皮瘤表现相同的组织形态学,但两者的病因、临床病程及治疗均不相同。由于该疾病较为罕见,其组织学特征和生存预后之间的关系尚不明确。Valente K Blackham A U Levine E 杨海玉 刘勇 2016临床与实验病理学杂志2016,32,11:4
16Blockchain-enabled resource management and sharing for 6G communications显示文摘The sixth-generation(6G)network must provide better performance than previous generations to meet the requirements of emerging services and applications,such as multi-gigabit transmission rate,higher reliability,and sub-1 ms latency and ubiquitous connection for the Internet of Everything(IoE).However,with the scarcity of spectrum resources,efficient resource management and sharing are crucial to achieving all these ambitious requirements.One possible technology to achieve all this is the blockchain.Because of its inherent properties,the blockchain has recently gained an important position,which is of great significance to the 6G network and other networks.In particular,the integration of the blockchain in 6G will enable the network to monitor and manage resource utilization and sharing efficiently.Hence,in this paper,we discuss the potentials of the blockchain for resource management and sharing in 6G using multiple application scenarios,namely,Internet of things,deviceto-device communications,network slicing,and inter-domain blockchain ecosystems.Hao Xu Paulo Valente Klaine Oluwakayode Onireti Bin Cao Muhammad Imran Lei Zhang 2020Digital Communications and Networks2020,6,3:4
17Paternal physical exercise modulates global DNA methylation status in the hippocampus of male rat offspring显示文摘It is widely known that maternal physical exercise is able to induce beneficial improvements in offspring cognition; however, the effects of paternal exercise have not been explored in detail. The present study was designed to evaluate the impact of paternal physical exercise on memory and learning, neuroplasticity and DNA methylation levels in the hippocampus of male offspring. Adult male Wistar rats were divided into two groups: sedentary or exercised fathers. The paternal preconception exercise protocol consisted of treadmill running, 20 minutes daily, 5 consecutive days per week for 22 days, while the mothers were not trained. After mating, paternal sperm was collected for global DNA methylation analysis. At postnatal day 53, the offspring were euthanized, and the hippocampus was dissected to measure cell survival by 5-bromo-2′-deoxiuridine and to determine the expression of synaptophysin, reelin, brain-derived neurotrophic factor and global DNA methylation levels. To measure spatial memory and learning changes in offspring, the Morris water maze paradigm was used. There was an improvement in spatial learning, as well as a significant decrease in hippocampal global DNA methylation levels in the offspring from exercised fathers compared with those from sedentary ones; however, no changes were observed in neuroplasticity biomarkers brain-derived neurotrophic factor, reelin and 5-bromo-2′-deoxiuridine. Finally, the global DNA methylation of paternal sperm was not significantly changed by physical exercise. These results suggest a link between paternal preconception physical activity and cognitive benefit, which may be associated with hippocampal epigenetic programming in male offspring. However, the biological mechanisms of this modulation remain unclear.Christiano Spindler Ethiane Segabinazi Andre Luis Ferreira de Meireles Francele Valente Piazza Filipe Mega Gabriela dos Santos Salvalaggio Matilde Achaval Viviane Rostirola Elsner Simone Marcuzzo 2019Neural Regeneration Research2019,14,3:3
18Two-dimensional control of light with light on metasurfaces显示文摘The ability to control the wavefront of light is fundamental to focusing and redistribution of light,enabling many applications from imaging to spectroscopy.Wave interaction on highly nonlinear photorefractive materials is essentially the only established technology allowing the dynamic control of the wavefront of a light beam with another beam of light,but it is slow and requires large optical power.Here we report a proof-of-principle demonstration of a new technology for two-dimensional(2D)control of light with light based on the coherent interaction of optical beams on highly absorbing plasmonic metasurfaces.We illustrate this by performing 2D all-optical logical operations(AND,XOR and OR)and image processing.Our approach offers diffractionlimited resolution,potentially at arbitrarily-low intensity levels and with 100 THz bandwidth,thus promising new applications in space-division multiplexing,adaptive optics,image correction,processing and recognition,2D binary optical data processing and reconfigurable optical devices.Maria Papaioannou Eric Plum João Valente Edward TF Rogers Nikolay I Zheludev 2016Light(Science & Applications)2016,5,1:3
19Host Active Defense Responses Occur within 24 Hours after Pathogen Inoculation in the Rice Blast System显示文摘Phenotypical, cytological and molecular responses of rice to the fungus Magnaporthe grisea were studied using rice cultivars and lesion mimic plants. The cultivar Katy was susceptible to several virulent M. grisea isolates, and a Sekiguchi like-lesion mimic mutant of Katy (LmmKaty) showed enhanced resistance to these isolates. Lesion mimic phenotype of LmmKaty was rapidly induced by virulent M. grisea isolates or by avirulent ones only at high levels of inoculum. Autofluorescence (a sign of an active defense response) was visible under ultraviolet light 24 h after localized inoculation in the incompatible interaction, whereas, not evident in the compatible interaction. Autofluorescence was also observed in LmmKaty 20 h after pathogen inoculation, indicating that rapid cell death is a mechanism of LmmKaty to restrict pathogen invasion. Rapid accumulations of defense related (DR) gene transcripts, phenylalanine ammonia lyase and R-glucanase, were observed beginning at 6 h and were obvious at 16 h and 24 h after inoculation in an incompatible interaction. Rapid transcript accumulations of PR-1 and chitinase had occurred by 24 h after inoculation in an incompatible interaction. Accumulations of these transcripts were delayed in the compatible interaction. These results indicate that host active defense responses occur 24 h after pathogen inoculation and that LmmKaty exhibits enhanced resistance to M. grisea. It is suggested that the autofluorescence and expression of the DR genes after heavy inoculation are important cytological and molecular markers respectively for early determination of the host response to M. grisea in the rice blast system.WANG Zhong-hua JIA Yu-lin LIN Hui Adair INTERN Barbara VALENT J. Neil RUTGER 2007Rice science2007,14,4:3
20A Prospective Policy Development to Increase Split-Liver Transplantation for 2 Adult Recipients: Results of a 12-Year Multicenter Collaborative Study显示文摘Paolo Aseni Tullia Maria De Feo Luciano De Carlis Umberto Valente Michele Colledan Umberto Cillo Giorgio Rossi Vincenzo Mazzaferro Matteo Donataccio Nicola De Fazio Enzo Andorno Patrizia Burra 2014Annals of Surgery2014,,1:3
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