Sign inSubmit
Tips: “quotes” for a phrase · author:Lee · a DOI goes straight to its article

80 articles for “barriers”
Set a search alert
Research ArticleOpen accessIn the abstractConcentration and Physicochemical Properties of Chitosan Derivatives Determine the Induction of Defense Responses in Roots and Leaves of Tobacco (Nicotiana tabacum) PlantsAlejandro B. Falcón-Rodríguez, Juan C. Cabrera, Eduardo Ortega, Miguel Ángel Martínez-TéllezProblem statement: The chitosan derivatives promote diverse defensive responses in plants, which are affected by chitosan chemical features and concentration. Glucanase (EC 3.2.1.6), Phenylalanine Ammonia-Lyase (PAL, EC 4.3.1.5) and peroxidase (POD, EC 1.11.1.6) are key enzymes in tobacco defense responses. Thus, the aim of this study was to know the behavior of their enzymatic activity in leaves and roots of … …American Journal of Agricultural and Biological Sciences, Vol. 4, Issue 3 · 30 Sep 2009 · 9,263 accessesView PDFCite
Research ArticleOpen accessIn the abstractRegionalism and Its Effects on Iranian Agricultural Exports: The Case of Economic Cooperation OrganizationMandana Toosi, Reza Moghaddasi, Saeed Yazdani, Majid AhmadianProblem statement: World economy has become increasingly integrated. There is an underlying assumption that integration into the world economy provides more opportunities for trade. The evidence shows that integration at the regional levels can help developing countries to prepare for the international economic integration. It will be important to outline and analyze past efforts at regional integration (regionalism) to have … …American Journal of Applied Sciences, Vol. 6, Issue 7 · 31 Jul 2009 · 6,926 accessesView PDFCite
Research ArticleOpen accessIn the abstractOptimal Dark Current Reduction in Quantum Well 9 µm GaAs/AlGaAs Infrared Photodetectors with Improved DetectivityShahram Mohammad Nejad, Saeed Olyaee, Maryam PourmahyabadiIn this research, an optimization approach is presented to decrease the dark current in GaAs/AlGaAs QWIPs. The dark current noise is reduced by increasing Al density in barriers, decreasing detector dimensions and increasing the periodic length of the structure. In addition, increasing the number of periods can reduce both the dark current and responsivity. Therefore, devices can be optimally designed … …American Journal of Applied Sciences, Vol. 5, Issue 8 · 31 Aug 2008 · 7,188 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Review on Construction Technologies that Enables Environmental Protection: Rubberized ConcreteG. Senthil Kumaran, Nurdin Mushule, M. LakshmipathyThroughout the world, the disposal of used tires is a major environmental problem causing environmental hazards such as breeding ground for mosquitoes, producing uncontrolled fire and they are contaminating the soil and vegetation. Therefore, there is an urgent need to identify alternative outlets for these tyres, with the emphasis on recycling the waste tyre. Concrete is an excellent structural material … …American Journal of Engineering and Applied Sciences, Vol. 1, Issue 1 · 31 Mar 2008 · 7,914 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluating the Implementation and Effectiveness of GIS-Based Application in Secondary School Geography LessonsAli DemirciThe purpose of the study was to investigate the barriers preventing the use of Geographic Information Systems (GIS) in secondary school geography lessons and to determine its effectiveness on students’ success. A workshop focusing on ways to implement GIS-based application in the classroom for 14 teachers from nine high schools was conducted in 2006. The teachers were given GIS software, … …American Journal of Applied Sciences, Vol. 5, Issue 3 · 31 Mar 2008 · 8,110 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Determinants of Deprivation in Jordan: Empirical StudyMohammed Issa ShahateetThe objective of this study was to determine and explain the factors that affect deprivation in Jordan. To do so, this study constructs and tests a model that determines the factors, which affect deprivation. It employs an econometric analysis to examine the relationship between some main socioeconomic variables and the status of deprivation in Jordan. It looks at how changes … …Journal of Social Sciences, Vol. 3, Issue 1 · 31 Mar 2007 · 7,594 accessesView PDFCite
Research ArticleOpen accessIn the abstractA UDDI Search Engine for SVG Federated Medical Imaging Web ServicesSabah Mohammed, Jinan Fiaidhi, Marshal HahnWith more and more medical web services appearing on the web, web service's discovery mechanism becomes essential. UDDI is an online registry standard to facilitate the discovery of business partners and services. However, most medical imaging applications exist within their own protected domain and were never designed to participate and operate with other applications across the web. However, private UDDI … …Journal of Computer Science, Vol. 2, Issue 4 · 30 Apr 2006 · 7,008 accessesView PDFCite
Research ArticleOpen accessIn the abstractLow Cost Long Distance Detector for Explosives and Chemical Analysis by IEC ApplicationGeorge H. Miley, Heinrich Hora, Frederick Osman et al.A radiation source for detecting specific chemicals at several meter distances even behind walls, car doors or other barriers is the application of Million electron Volts (MeV) neutrons from nuclear fusion reactions at such low intensities to avoid any danger for human bodies. The chemical analysis consists in the neutron activation of nuclei emitting then gamma radiation of lines very … …American Journal of Applied Sciences, Vol. 2, Issue 11 · 30 Nov 2005 · 6,513 accessesView PDFCite
Research ArticleOpen accessIn the abstractDuration Modeling in Undergraduate Econometrics Curriculum via ExcelIsmail H. GencThe main goal of an Econometrics course is to prepare students for more advanced levels of study and make them able to cope with the empirical problems they are likely to face. In recent years, there has been a tendency to purge merely theoretical topics from the econometric textbooks by including only time honored methods. Survival analysis, however, has so … …American Journal of Applied Sciences, Vol. 1, Issue 4 · 31 Dec 2004 · 7,053 accessesView PDFCite
Research ArticleOpen accessIn the abstractKey Success Factors of 3rd Generation Mobile Network Services for M-Commerce in MalaysiaSaravanan MuthaiyahWhile there has been a great deal of excitement in view of M-commerce, very little is actually known about conditions and critical success factors for successful introduction of the 3rd generation mobile network services here in Malaysia. This study investigates the factors for successful diffusion of 3G network services and their role in advancing an interactive marketplace. 3G which simply … …American Journal of Applied Sciences, Vol. 1, Issue 4 · 31 Dec 2004 · 6,876 accessesView PDFCite