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730 results for “Mass”
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Research ArticleOpen accessEvery word in the titleMost Used Rock Mass Classifications for Underground OpeningAl-Jbori A’ssim, Zhang Y. XingProblem statement: Rock mass characterization is an integral part of rock engineering practice. The empirical design methods based on rock mass classifications systems provide quick assessments of the support requirements for underground excavations at any stage of a project, even if the available geotechnical data are limited. The underground excavation industry tends to lean on empirical approaches such as rock … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 2 · 30 Jun 2010 · 7,274 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleMetabolic Fingerprinting of Three Malaysian Ginger (Zingiber officinale Roscoe) Using Gas Chromatography-Mass SpectromertryH.J. Mahdi, R. Andayani, IshakProblem statement: There is a chemical variation among different ginger cultivars detected by previous studies including the volatile and non-volatile oleo-resins. In this study we try to determine whether these variations are related to a genetic factor rather than environmental or intrinsic factors. Approach: A comprehensive metabolic fingerprinting from the leaves of three micro-propagated ginger cultivars Bukit Tinggi, Tanjung Sepat … …American Journal of Applied Sciences, Vol. 7, Issue 1 · 31 Jan 2010 · 7,387 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleScreening of Breast Mass in Iraqi Females: Al-Kindy Hospital Breast ClinicWijdan AkramProblem statement: The aim of this study is to present the findings of a retrospective analysis in females with breast mass, the character of the women and the risk factors of breast cancer at Al-Kindy Breast Clinic Center. Approach: Data were collected during 2 months period using special form of questioner. The total number of studied sample was 60, which … …American Journal of Infectious Diseases, Vol. 5, Issue 4 · 31 Dec 2009 · 6,803 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleExact Solutions of Mass Transfer over a Stretching Surface with Chemical Reaction and Suction/InjectionHassan A.M. El-ArabawyProblem statement: In this research the researchers studied and made an analysis to the effects of suction/injection and chemical reaction on mass transfer characteristics over a stretching surface. The researcher studied the effects of some parameters appear on mass transfer. Approach: Transforming the system of partial differential equations to a system of ordinary differential equations and obtaining the exact analytical … …Journal of Mathematics and Statistics, Vol. 5, Issue 3 · 30 Sep 2009 · 7,510 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffects of Oxygenated Gasoline on Fuel and Air Mass Flow Rates and Air-Fuel RatioWaleed Momani, Suleiman Abu-Ein, Montaser Momani, Sayel M. FayyadThe effects of excess feeding oxygen to the fuel-air mixture on air and fuel mass flow rates and also on air-fuel ratio are investigated here experimentally. This study concerned with the effects of injecting pure oxygen quantity to the mixture of fuel and air before interring the combustion chambers. It is found that the mass flow rate of fuel with … …American Journal of Applied Sciences, Vol. 6, Issue 5 · 31 May 2009 · 7,367 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleMass Spectrometry/Mass Spectrometry Study on the Degradation of B-Aflatoxins in Maize with Aqueous Citric AcidA. Méndez-Albores, I. Nicolás-Vázquez, R. Miranda-Ruvalcaba, E. Moreno-MartÍnezDegradation of B-aflatoxins in maize by means of 1N aqueous citric acid was confirmed by the AFLATEST immunoaffinity column method, High Performance Liquid Chromatography (HPLC), tandem mass spectrometry (MS/MS) and computational information. The AFLATEST and HPLC assays showed that 96.7% degradation occurred in maize contaminated with 93 ng g-1 when treated with the aqueous citric acid. Two major products, produced … …American Journal of Agricultural and Biological Sciences, Vol. 3, Issue 2 · 30 Jun 2008 · 8,049 accessesView PDFCite
Research ArticleOpen accessEvery word in the titlePrimary Pollutants Monitoring and Modeling Using Chemical Mass Balance (CMB) Around Fahaheel Residential AreaS. M. Al-Salem, A. A. Al-Haddad, A. R. KhanFour major sources of air pollution were identified and modeled using Chemical Mass Balance (CMB) around a residential area. The sources were identified as MAA refinery, downtown area, upstream facilities and main highway road. The sources were analyzed using a series of concentration roses (unfiltered and filtered) executed from the data collected. Data collected included primary and secondary pollutants levels … …American Journal of Environmental Sciences, Vol. 4, Issue 1 · 29 Feb 2008 · 6,742 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleAn Engineer's Mathematical Approach to Designing an Emergency Room Decontamination Area for Weapons of Mass Destruction CasualtiesEldo E. Frezza, Erica Fletcher, Veronica Flores et al.This study will focus on the potential requirements for an emergency response facility in case of weapons of mass destruction casualties proposing mathematical models. A complete emergency room layout will be designed taking the following analyses and requirements into consideration: quality function development (QFD) and product layout; average number of patients in the system, average time in the system, average … …Journal of Social Sciences, Vol. 3, Issue 4 · 31 Dec 2007 · 8,429 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffects of the Mass Transfer Process in Oil SpillFabián Betancourt, Arturo Palacio, Alejandro RodriguezA revision of the models used to study the behavior of the mass loss processes associated with petroleum spills on water and to compare those models with experimental data. The processes of mass transfer studied in this work are evaporating, dissolution, vertical dispersion, emulsification and the changes of properties associated with these. The comparison of the estimations with the field … …American Journal of Applied Sciences, Vol. 2, Issue 5 · 31 May 2005 · 7,502 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleImprove the Consumption of Cement and Sand in Massive ConcreteKaveh Ostad-Ali-Askari et al.The massive concretemixing plan is very important due to its large volume of use in concrete dams.Productivity can be increased in dam manufacturing industry by adopting asuitable method for mixing mass concrete that can meet design, executive andeconomic needs. Because of intensification rate construction of dams newperiods and high cost of implementing such projects any step that reduces theircost of … …American Journal of Engineering and Applied Sciences, Vol. 14, Issue 3 · 1 Nov 2021 · 6,347 accessesView PDFCite