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A multiscale analysis of herbaceous species richness in a Mediterranean ecosystem

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Journal of Plant Ecology 2013年第2期6卷 113-121页

作者： lior Blank Raphael Linker Yohay Carmel Faculty of Civil and Environmental Engineering Technion-Israel Institute of TechnologyHaifa 32000Israel

Aims studies of species distribution patterns traditionally have been conducted at a single scale,often overlooking species-environment relationships operating at finer or coarser *** diversity-related hypotheses at multiple scales requires a robust sampling design that is nested across *** chief motivation in this study was to quantify the contributions of different predictors of herbaceous species richness at a range of local *** Here,we develop a hierarchically nested sampling design that is balanced across scales,in order to study the role of several envi-ronmental factors in determining herbaceous species distribution at various scales *** focus on the impact of woody vegetation,a relatively unexplored factor,as well as that of soil and *** detection and ranging(liDAR)imaging enabled precise characterization of the 3D structure of the woody vegetation,while acoustic spectrophotometry allowed a particularly high-resolution mapping of soil CaCo3 and organic matter *** Findings We found that woody vegetation was the dominant explanatory variable at all three scales(10,100 and 1000 m2),accounting for more than 60%of the total explained *** addition,we found that the species richness-environment relationship was scale *** studies that explicitly address the issue of scale do so by comparing local and regional *** results show that efforts to conserve plant communities should take into account scale dependence when analyzing species richness-environment relationships,even at much finer resolutions than local *** addition,conserving heterogeneity in woody vegetation structure at multiple scales is a key to conserving diverse herbaceous communities.

关键词： LiDAR Ramat Hanadiv Nature Park redundancy analysis species-environment relationship woody vegetation

The Arabidopsis Cysteine-Rich GASA5 Is a Redox-Active Metalloprotein that Suppresses Gibberellin Responses

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Molecular Plant 2014年第1期7卷 244-247页

作者： lior Rubinovich Sharon Ruthstein David Weiss Institute of Plant Sciences and Genetics in Agriculture The Robert H. Smith Faculty of Agriculture Food and Environment The Hebrew University of Jerusalem PO Box 12 Rehovot 76100 Israel Department of Chemistry Faculty of Exact Science Bar Ilan University Ramat Gan 5290002 Israel

The plant-specific GIBBERELLIN （GA）-STIMULATED TRANSCRIPT 1 （GAST1）-like genes have been identified in numerous plant species and many of them are regulated by the phytohormone GA. All encode small proteins with a conserved cysteine-rich C-terminus, containing 12 cysteines in conserved positions. The fact that the number and positions of all 12 cysteines have not changed during the course of evolution strongly implies fundamental and important biochemical and bioloaical functions.

关键词： SUPEROXIDE DISMUTASES PROTEIN STRESS GENES

Design of advanced aerogel structures for oxygen reduction reaction electrocatalysis

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SusMat 2023年第1期3卷 44-57页

作者： Leigh Peles-Strahl Yeela Persky lior Elbaz Department of Chemistry Bar-Ilan UniversityRamat-GanIsrael Soreq NRC YavneIsrael

Oxygen reduction reaction(ORR)is considered the bottleneck reaction in fuel *** sluggish kinetics requires the use of scarce and expensive platinum group metal(PGM)*** efforts have been invested in trying to find a PGM-free catalyst to replace Pt for this reaction or reduce its *** interesting family of materials that has shown great promise in doing so is aerogels,which are based on covalent *** aerogels’high surface area and porosity enable good mass transport and high catalyst utilization that is expected to lower PGM loadings or replacing them *** review summarizes recent research in this field,introducing methods of using aerogels as cathodes for ORR,from carbon to metal *** catalytic sites vary from nanoparticles to atomically dispersed metal ions embedded in carbon aerogels that form all-in-one platform which can serve as both the support and the catalyst.

关键词： aerogels catalyst supports electrocatalysis fuel cells oxygen reduction reaction

Recent progress in C-N coupling for electrochemical CO_(2) reduction with inorganic nitrogenous species in aqueous solution

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Materials Reports(Energy) 2023年第1期3卷 65-77,I0003页

作者： Shuxia Liu Tanyuan Wang lior Elbaz Qing Li State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanHubei430074China Department of Chemistry and the Institute of Nanotechnology and Advanced Materials Bar-Ilan UniversityRamat-Gan5290002Israel

The electrocatalytic CO_(2) reduction in aqueous solution mainly involves bond cleavage and formation between C,H and O,and it is highly desirable to expand the bond formation reaction of C with other atoms to obtain novel and valuable *** electrochemical synthesis of N-containing organic chemicals in electrocatalytic CO_(2) reduction via introducing N sources is an effective strategy to expand the product scope,since chemicals con-taining C–N bonds(*** and amines)are important reactants/products for medicine,agriculture and *** article focuses on the research progress of C–N coupling from CO_(2) and inorganic nitrogenous species in aqueous ***,the reaction pathways related to the reaction intermediates for urea,formamide,acetamide,methylamine and ethylamine are ***,the electrocatalytic performance of different catalysts for these several N-containing products are summarized and ***,the challenges and op-portunities are analyzed,aiming to provide general insights into future research directions for electrocatalytic C–N coupling.

关键词： CO_(2) reduction C-N coupling Heterogeneous electrocatalysis Amide Amine

ConfDTree: A Statistical Method for Improving Decision Trees

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Journal of Computer Science & Technology 2014年第3期29卷 392-407页

作者： Gilad Katz Asaf Shabtai lior Rokach Nir Ofek Department of Information Systems Engineering Ben-Gurion University of the NegevBeer Sheva 8410501Israel Telekom Innovation Laboratories Ben-Gurion University of the NegevBeer Sheva 8410501Israel

Decision trees have three main disadvantages： reduced performance when the training set is small; rigid decision criteria; and the fact that a single ＂uncharacteristic＂ attribute might ＂derail＂ the classification process. In this paper we present ConfDTree （Confidence-Based Decision Tree） -- a post-processing method that enables decision trees to better classify outlier instances. This method, which can be applied to any decision tree algorithm, uses easy-to-implement statistical methods （confidence intervals and two-proportion tests） in order to identify hard-to-classify instances and to propose alternative routes. The experimental study indicates that the proposed post-processing method consistently and significantly improves the predictive performance of decision trees, particularly for small, imbalanced or multi-class datasets in which an average improvement of 5%-9% in the AUC performance is reported.

关键词： decision tree confidence interval imbalanced dataset

Sniffing Bacteria with a Carbon-Dot Artificial Nose

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Nano-Micro Letters 2021年第7期13卷 138-152页

作者： Nitzan Shauloff Ahiud Morag Karin Yaniv Seema Singh Ravit Malishev Ofra Paz-Tal lior Rokach Raz Jelinek Department of Chemistry Ben Gurion University of the Negev84105 Beer ShevaIsrael Department of Biotechnology Engineering Ben Gurion University of the Negev84105 Beer ShevaIsrael Chemistry Department Nuclear Research CenterNegevP.O.Box 900184190 Beer ShevaIsrael Department of Software and Information System Engineering Ben-Gurion University of the NegevBeer ShevaIsrael Ilse Katz Institute for Nanotechnology Ben Gurion University of the Negev84105 Beer ShevaIsrael

Continuous,real-time monitoring and identification of bacteria through detection of microbially emitted volatile molecules are highly sought albeit elusive *** introduce an artificial nose for sensing and distinguishing vapor molecules,based upon recording the capacitance of interdigitated electrodes(IDEs)coated with carbon dots(C-dots)exhibiting different *** of the C-dot-IDEs to volatile molecules induced rapid capacitance changes that were intimately dependent upon the polarities of both gas molecules and the electrode-deposited *** deciphered the mechanism of capacitance transformations,specifically substitution of electrode-adsorbed water by gas molecules,with concomitant changes in capacitance related to both the polarity and dielectric constants of the vapor molecules *** C-dot-IDE gas sensor exhibited excellent selectivity,aided by application of machine learning *** capacitive C-dot-IDE sensor was employed to continuously monitor microbial proliferation,discriminating among bacteria through detection of distinctive“volatile compound fingerprint”for each bacterial *** C-dot-IDE platform is robust,reusable,readily assembled from inexpensive building blocks and constitutes a versatile and powerful vehicle for gas sensing in general,bacterial monitoring in particular.

关键词： Carbon dots Bacterial detection Bacterially emitted volatile molecules Capacitive gas sensors Gas polarity

Preventive treatment of alveolar pulmonary edema of cardiogenic origin

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Journal of Geriatric Cardiology 2012年第4期9卷 321-327页

作者： Gideon Charach Michael Shochat Alexander Rabinovich Oded Ayzenberg Jacob George lior Charach Pavel Rabinovich Department of Internal Medicine 'C' Tel Aviv Sourasky Medical Center 6 Weizman Street Tel Aviv 64239 Israel Department of Cardiology Hillel Yaffe Medical Center Hadera P.O. Box 169 Hadera 38100 Israel Department of Geriatrics Tel Aviv Sourasky Medical Center 6 Weizman Street Tel Aviv 64239 Israel Department of Cardiology Kaplan Medical Center Pasternak Street P.O. Box 1 Rehovot 76100 Israel

Objective To evaluate the efficacy of preventive treatment (PT) on alveolar pulmonary edema (APE) of cardiogenic origin using a monitor based on principles of internal thoracic impedance (ITI) *** We conducted blinded clinical trials on patients with ST-elevation myocardial infarction (STEMI) and monitored whether the condition would progress to APE. ITI was measured noninvasively by the Edema Guard Monitor (EGM, model RS-207) every 30 min. The measurement threshold for the diagnosis of APE was fixed at > 12% decrease in ITI from baseline as described in our methodology. The patients were divided into one group that received standard treatment after the appearance of clinical signs of APE without considering the prediction of APE by EGM devise (Group 1), and another group of asymptomatic patients in whom development of APE was predicted by using only EGM measurements (Group 2). The latter participants’PT consisted of furosemide, intravenous nitroglycerine and supplemental oxygen. Results One-hundred and fifty patients with acute STEMI were enrolled into this study. Group 1 included 100 patients (53% males, age 64.1 ±12.6 years). Treatment was started after the clinical appearance of overt signs of APE. Group 2 included 50 patients (54% males, age 65.2 ±11.9 years) who received PT based on EGMmeasurements. Group 2 had significantly fewer cases of APE (n = 4, 8%) than Group 1 (n = 100, 100%) (P > 0.001). While APE was lethal in six (6%) Group 1 patients, PT resulted in prompt resolution of APE in all four (8%) Group 2 patients. Conclusion ITI is a usefulmodality for early diagnosis and PT of pulmonary edema of cardiogenic origin.

关键词： Cardiogenic pulmonary edema Early prediction Internal thoracic impedance Monitoring cardiac patients Preventive treatment

Antiviral therapy in cytomegalovirus-positive ulcerative colitis:A systematic review and meta-analysis

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World Journal of Gastroenterology 2014年第10期20卷 2695-2703页

作者： Uri Kopylov Noa Eliakim-Raz Andrew Szilagy Ernest Seidman Shomron Ben-Horin lior Katz Department of Gastroenterology Sheba Medical Center Tel Hashomer Ramat Gan 5262 Israel Division of Gastroenterology McGill University Health Center Montreal Quebec H3G 1A4Canada Sackler School of Medicine Tel-Aviv University Ramat-Aviv Tel-Aviv 69978Israel Department of Medicine E Beilinson Hospital Rabin Medical Center Petach Tikva 49100 Israel Division of Gastroenterology Jewish General Hospital McGill University Montreal Quebec H3T 1E2Canada

AIM: To evaluate the impact of antiviral treatment on cytomegalovirus (CMV)-positive ulcerative colitis patients.

关键词： Ulcerative colitis Cytomegalovirus Colectomy Antiviral treatment Gancyclovir Foscarnet

Incidence of colorectal neoplasms among male pilots

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World Journal of Gastroenterology 2014年第27期20卷 9116-9120页

作者： Menachem Moshkowitz Ohad Toledano lior Galazan Aharon Hallak Nadir Arber Erwin Santo Integrated Cancer Prevention Center and Department of Gastroenterology Tel-Aviv Sourasky Medical Center and Sackler Faculty of Medicine Tel-Aviv University

AIM: To assess the prevalence of colorectal neoplasms (adenomas, advanced adenomas and colorectal cancers) among Israeli military and commercial airline pilots.

关键词： Colorectal cancer Adenomatous polyps Colon neoplasms Hyperplastic polyps