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Production of carbonaceous material from avocado peel for its application as alternative adsorbent for dyes removal

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Chinese Journal of Chemical Engineering 2016年第4期24卷 521-528页

作者： Carolyn Palma Lucia Lloret Antonio Puen Maira Tobar elsa Contreras departamento de Ingenieria Quimica Ambiental Universidad Tecnica Federico Santa Mafia Vicunia Mackenna 3939 Santiago Chile departamento de Ingenieria Quimica Universidad de Santiago de Chile Alameda 3363 Santiago Chile

Adsorption processes have received special attention for contaminants removal thanks to their capability to gen- erate effluents with high quality as well as their simple design. In the current work, the agro-waste residue avo- cado peel is proposed to be used as alternative to conventional activated carbons whose use is sometimes restricted to high costs, upgraded by their exhausting after long term operations. The carbonization procedure was optimized and analyzed through factorial design and response surface methodology by evaluating temper- ature （400-900 ℃） and time （30-90 min） effects： optimal conditions were found at 900℃ and 65 min, gener- ating an adsorbent with 87.52 m2.g 1 of BET surface area, a mesopore volume of 74% and a zero point charge at 8.6. The feasibility of the carbonaceous material was proved for the removal of a variety of dyes by investigating substrate （10-50 mg.L 1） and solid （0.5-20 g.L-1） concentration effects and statistical significance： complete removal of Naphthol Blue Black and Reactive Black 5 was reached under optimal conditions （10 mg.L 1 and 20g.L 1 of dye and solid, respectively）, while Basic Blue 41 was eliminated by using 13.4 g. L- 1 of the adsorbent. Overall, dyes removal by adsorption on carbonized avocado peel is presented as a promising technology due to the low cost and easy availability of the precursor, as well as the straightforward generation, the satisfactory char- acteristics and the proved adsorption capacity of the adsorbent.

关键词： Avocado peelCarbonizationOptimizationAdsorptiondyes

Challenges and opportunities in improving left ventricular remodelling and clinical outcome following surgical and trans-catheter aortic valve replacement

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Frontiers of Medicine 2021年第3期15卷 416-437页

作者： Xu Yu Jin Mario Petrou Jiang Ting Hu ed d Nicol John R Pepper Surgical Echo-Cardiology Services Oxford Heart CentreJohn Radcliffe HospitalOxford University Hospitals NHS Foundation TrustOxford OX39DUUK Cardiac Surgical Physiology and Genomics Group Nuffield Division of Clinical Laboratory SciencesRadcliffe Department of MedicineUniversity of OxfordOxford OX39DUUK department of Cardiac Surgery Royal Brompton HospitalLondon SW36NPUK National Heart and Lung Institute Imperial College LondonLondon SW36LYUK NIHR Imperial Biomedical Research Centre London W21NYUK department of Cardiology Royal Brompton HospitalLondon SW36NPUK

Over the last half century,surgical aortic valve replacement(SAVR)has evolved to offer a durable and efficient valve haemodynamically,with low procedural complications that allows favourable remodelling of left ventricular(LV)structure and *** latter has become more challenging among elderly patients,particularly following trans-catheter aortic valve implantation(TAVI).Precise understanding of myocardial adaptation to pressure and volume overloading and its responses to valve surgery requires comprehensive assessments from aortic valve energy loss,valvular-vascular impedance to myocardial activation,force-velocity relationship,and myocardial *** hypertrophy and myocardial fibrosis remains as the structural and morphological focus in this *** intervention in asymptomatic aortic stenosis or regurgitation along with individualised management of hypertension and atrial fibrillation is likely to improve patient *** pacing via the his-Purkinje system for conduction abnormalities,further reduction in para-valvular aortic regurgitation along with therapy of angiotensin receptor blockade will improve patient outcome by facilitating hypertrophy regression,LV coordinate contraction,and global vascular *** leaflet thromboses require anticoagulation while impaired access to coronary ostia risks future TAVI-in-TAVI or coronary *** comparable long-term durability and the resolution of TAVI related complications become available,SAVR remains the first choice for lower risk younger patients.

关键词： surgical aortic valve replacement trans-catheter aortic valve implantation left ventricular hypertrophy and fibrosis myocardial force-velocity relationship his-Purkinje pacing renin-angiotensin system inhibitors coronary access impairment

Antibacterial activity and characterization of secondary metabolites isolated from mangrove plant Avicennia officinalis

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Asian Pacific Journal of Tropical Medicine 2010年第7期3卷 544-546页

作者： Valentin Bhimba B J Meenupriya elsa Lycias Joel d edaya Naveena Suman kumar M Thangaraj department of Biotechnology Sathyabama University Rajiv Gandhi SalaiChennai-119Tamil naduIndia Institute for Environmental Research and Social education Nagercoil Kanyakumari DistrictIndia Research Scholar Department of BiotechnologySathyabama UniversityRajiv Gandhi Salai.Chennai-119Tamil naduIndia CAS in Marine Biology Annamalai UniversityParangipettai-608 502Cuddalore DistrictIndia

Objective:To explore antibacterial activity and characterization of secondary metabolites isolated from mangrove plant Avicennia officinalis(***).Methods:In the present study the leaf extracts of *** were examined for its antibacterial potential using five different solvents against some reference strains of human pathogenic bacteria for the crude *** activity was observed for ethyl acetate and hence different concentrations like 15μL,25μL,and 50μL of ethyl extracts was checked for its antibacterial *** purification of crude extract was carried by column chromatography and fractions were analyzed using gas chromatography-mass spectrometry(GC-MS) to identify ***:The crude ethyl acetate extracts of *** showed remarkable antibacterial activity with zones of inhibition of 13 mm against Eschericia coli(***) and 11 mm against Staphylococcus aureus (***).Fraction 13(ethyl acetate:methanol= 8:2) as the most potent one against with the minimal inhibitory concentration of 30 mm against *** and 25 mm against *** GCMS resultsof active column fraction(F13) revealed that the active principals were a mixture of hydroxy- 4 methoxybenzoic acid,diethyl phthalate,oleic ***:The leaf extracts with proven antibacterial effects can clearly be directed towards cancer treatment as to inhibiting cancer cell *** limited number of test organisms owes to a constraint of ***,the effect of strong bursts of leaf extracts on human pathogenic bacteria should further be tested on a wide range of test organisms.

关键词： Mangrove Avicennia officinalis Antibacterial GC-MS

Numerical Simulation of Macrosegregation Caused by Thermal–Solutal Convection and Solidification Shrinkage Using ALE Model

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Acta Metallurgica Sinica(English Letters) 2019年第11期32卷 1396-1406页

作者： Kang-Xin Chen Hou-fa Shen Key laboratory for Advanced Materials Processing Technology Ministry of Education School of Materials Science and Engineering Tsinghua University

Solidifi cation shrinkage has been recognized as an important factor for macrosegregation formation. An arbitrary lagrangian–Eulerian(ALE) model is constructed to predict the macrosegregation caused by thermal–solutal convection and solidi-fi cation shrinkage. A novel mesh update algorithm is developed to account for the domain change induced by solidifi cation shrinkage. The velocity–pressure coupling between the non-homogenous mass conservation equation and momentum equation is addressed by a modifi ed pressure correction method. The governing equations are solved by the streamline-upwind/Petrov–Galerkin-stabilized fi nite element algorithm. The application of the model to the Pb-19.2 wt%Sn alloy solidifi cation problem is considered. The inverse segregation is successfully predicted, and reasonable agreement with the literature results is obtained. Thus, the ALE model is established to be a highly effective tool for predicting the macrosegregation caused by solidifi cation shrinkage and thermal–solutal convection. Finally, the effect of solidifi cation shrinkage is analyzed. The results demonstrate that solidifi cation shrinkage delays the advance of the solidifi cation front and intensifi es the segregation.

关键词： Macrosegregation Solidification shrinkage Finite element method Arbitrary lagrangian–Eulerian(ALE)

Helicobacter pylori HopE and HopV porins present scarce expression among clinical isolates

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World Journal of Gastroenterology 2010年第3期16卷 320-329页

作者： Maritza Lienlaf Juan Pablo Morales María Inés díaz Rodrigo díaz elsa Bruce Freddy Siegel Gloria León Paul R Harris Alejandro Venegas Microbial Pathogenesis and Vaccine Biotechnology laboratory Department of Molecular Genetics and MicrobiologyFaculty of Biological SciencesPontificia Universidad Católica de Chile Gastroenterology Unit Faculty of MedicineUniversidad Austral de Chile Institute of Biochemistry Faculty of SciencesUniversidad Austral de Chile department of Pediatrics School of MedicinePontificia Universidad Católica de Chile

AIM:To evaluate how widely Helicobacter pylori (H. pylori ) HopE and HopV porins are expressed among Chilean isolates and how seroprevalent they are among infected patients in ***: H. pylori hopE and hopV genes derived from strain CHCTX-1 were cloned by polymerase chain reaction (PCR), sequenced and expressed in Escherichia coli Ad494 (dE3). Gel-purified porins were used to prepare polyclonal antibodies. The presence of both genes was tested by PCR in a collection of H. pylori clinical isolates and their expression was detected in lysates by immunoblotting. Immune responses against HopE, HopV and other H. pylori antigens in sera from infected and non-infected patients were tested by Western blotting using these sera as f irst antibody on recombinant H. pylori ***: PCR and Western blotting assays revealed that 60 and 82 out of 130 Chilean isolates carried hopE and hopV genes, respectively, but only 16 and 9, respectively, expressed these porins. IgG serum immunoreactivity evaluation of 69 H. pylori-infected patients revealed that HopE and HopV were infrequently recognized (8.7% and 10.1% respectively) compared to H. pylori VacA (68.1%) and CagA (59.5%) antigens. Similar values were detected for IgA serum immunoreactivity against HopE (11.6%) and HopV (10.5%) although lower values for VacA (42%) and CagA (17.4%) were obtained when compared to the IgG ***: A scarce expression of HopE and HopV among Chilean isolates was found, in agreement with the infrequent seroconversion against these antigens when tested in infected Chilean patients.

关键词： Helicobacter pylori Gene expression HopE and HopV porins Antigens Immune response

EXERCISE，ANTIOXIdANTS，ANd CARdIOPROTECTION

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中国运动医学杂志 2004年第1期23卷 57-63页

作者： ScottK.Powers Ph.d. ed.d. departmentofExerciseandSportSciences departmentofPhysiology UnwenityofFloridaGainesville FloridaU.S.A.

Cardiovascular disease continues to be the number one cause of death in the United States.

关键词：运动抗氧化剂心功能保护心血管疾病冠状动脉疾病

different patterns of intestinal response to injury after arterial,venous or arteriovenous occlusion in rats

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World Journal of Gastroenterology 2009年第31期15卷 3901-3907页

作者： Francisco Javier Guzmán-de la Garza Carlos Rodrigo Cámara-Lemarroy Gabriela Alarcón-Galván Paula Cordero-Pérez Linda elsa Muoz-Espinosa Nancy Esthela Fernández-Garza department of Physiology Autonomous University of Nuevo LeónSchool of Medicine Pathologic Anatomy and Cytopathology Service "José Eleuterio González" University Hospital Liver Unit Department of Internal MedicineAutonomous University of Nuevo LeónSchool of Medicine

AIM： To investigate the differences in injury patterns caused by arterial, venous or arteriovenous mesenteric occlusion. METHOdS： Male Wistar rats were separated equally into four groups. Occlusion was performed by clamping the superior mesenteric artery （A）, the mesenteric vein （V） or both （AV） for 30 min, followed by 60 min of reperfusion. A control group received sham surgery only. Intestinal sections were examined for histological damage and serum tumor necrosis factor-α （TNF-α）, endothelin-1 （ET-1）, P-selectin, antithrombin Ⅲ （AT Ⅲ） and soluble intracellular adhesion molecule-1 （ICAM-1） concentrations were measured. RESULTS： All groups showed significant mucosal injury compared to controls. Furthermore, mucosal injury was significantly more severe in the V and AV groups compared to the A group （3.6 ± 0.55, 3.4 ± 0.55 and 2± 0.71, respectively, P = 0.01）. ICAM-1 was similarly elevated in all groups, with no significant differences between the groups. P-selectin levels were significantly elevated in the V and AV groups but not the A group （1.4 ± 0.5 ng/mL, 2.52 ± 0.9 ng/mL and 0.02± 0.01 ng/mL, respectively, P = 0.01） and ET-1 was significantly elevated in the A and V groups but not the AV group （0.32 ± 0.04 pg/mL, 0.36 ± 0.05 pg/mL and 0.29 ± 0.03 pg/mL, respectively, P = 0.01） compared to sham controls. ATⅢ levels were markedly depleted in the V and AV groups, but not in the A group （29.1 ± 5.2 pg/mL, 31.4 ±21.8 pg/mL and 55.8± 35.6 pg/mL, respectively, P = 0.01）, compared to controls. Serum TNF-α was significantly increased in all groups compared to sham controls （1.32 ± 0.87 ng/mL, 1.79 ± 0.20 ng/mL and 4.4 ± 0.69 ng/mL, for groups A, V and AV, respectively, P = 0.01）, with higher values in the AV group. CONCLUSION： different patterns of response to ischemia/reperfusion are associated with venous, arterial or arteriovenous occlusion. Venous and arteriovenous occlusion was associated with the most severe alterations

关键词： Arterial occlusion Rat Intestine Ischemia/ reperfusion Venous occlusion

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摇摆中的“摇摆州”与新移民

环球财经 2024年第5期 122-123页

作者：丰君子艾德·霍尔(ed Hall)(图) 不详

1796年9月17日,美国首位总统乔治·华盛顿在当时的重要报纸《美国广告者日报》向全体美国人民发表了著名的公开告别信。这封公开信又被称为“华盛顿的告别演说”。信中,华盛顿除了谢绝连任总统的提议,还着重表达了自己对党派斗争与分立... 详细信息

1796年9月17日,美国首位总统乔治·华盛顿在当时的重要报纸《美国广告者日报》向全体美国人民发表了著名的公开告别信。这封公开信又被称为“华盛顿的告别演说”。信中,华盛顿除了谢绝连任总统的提议,还着重表达了自己对党派斗争与分立的看法。

关键词：乔治·华盛顿党派斗争公开信摇摆

WUI fire risk mitigation in Europe:A performance-based design approach at home-owner level

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Journal of Safety Science and Resilience 2020年第2期1卷 97-105页

作者： Pascale Vacca david Caballero elsa Pastor Eulàlia Planas Centre for Technological Risk Studies Department of Chemical EngineeringUniversitat Politècnica de Catalunya•BarcelonaTechEduard Maristany 10-14BarcelonaCatalonia E-08019Spain Pau Costa Foundation c.Castell 11TivissaTarragonaSpain

Fires at the Wildland-Urban Interface(WUI)are becoming increasingly hazardous for life safety and property *** and standards for fire practitioners are needed in order to help WUI communities face this threat and become fire-adapted.A performance-based design approach(PBd)is proposed to deal with the complex issues present at the WUI homeowner scale,which entails the use of Computational Fluid dynamics(CFd)tools such as FdS in order to identify vulnerabilities in a quantitative *** analysis of recent European WUI fires is presented,along with the definition of several pattern scenarios that can be derived from *** on this analysis,examples of PBd fire scenarios specific for the Mediterranean WUI microscale are presented,involving glazing systems,roofing and gutters,external structures adjacent to the main building,and gaps present in the building envelope.A worked example to show the implementation of the proposed PBd method is provided in which the fire impact of residential fuel on a glazing system is quantitatively analysed.

关键词： CFd simulation Wildland-urban interface Vulnerability assessment House loss design fire scenarios