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68 articles for “ester”
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Research ArticleOpen accessIn the keywordsOptimized Biodiesel Production from jatropha curcas oilHaruna Musa, Daniel Eric, Alkhairu Hassan et al.In this study, a mathematical model for the trans-esterification reaction of jatropha curcas seed Oil (JCO) was developed using Response Surface Methodology(RSM) in terms of operational variables such as temperature (50 to 80°C), catalyst concentration (0.7 to 1% in relation to oil mass) and methanol/oil ratio (3:1-9:1), at fixed reaction time (90 min) and mixing intensity. Biodiesel was produced by … …Energy Research Journal, Vol. 12, Issue 1 · 12 Oct 2021 · 7,286 accessesView PDFCite
Research ArticleOpen accessIn the keywordsImplications of Method Chosen for Analysis of Fatty Acids in Meat: A ReviewLivia Facuri Araujo Macedo, Ellen Cristina Quirino Lacerda, Roberio Rodrigues Silva et al.The influence of the beef Fatty Acid (FA) profile on human health, has become a recurring concern. For an analysis of the lipid composition of food, it is necessary that the complex lipids be quantified in a suitable form for subsequent analysis of their composition by gas chromatography. The choice of appropriate methods of lipid extraction and esterification of fatty … …American Journal of Agricultural and Biological Sciences, Vol. 7, Issue 3 · 9 Jul 2012 · 8,633 accessesView PDFCite
Research ArticleOpen accessIn the keywordsThe Effect of Rumen Acid Load on Postpartum Performance and Blood Metabolic Responses in Transition Holstein CowsSadjad Danesh Mesgaran, Alireza Vakili, Alireza Heravi Moosavi, Ghasem KoolabadiProblem statement: The transition period is the most stressful time in the production cycle of a dairy cow because of depressed feed intake, endocrine and metabolic changes at parturition. The aim was to determine the effect of rumen acid load on postpartum performance and metabolic parameters in transition Holstein cows. Approach: The Acidogenicity Values (AV) of the diets were determined … …American Journal of Animal and Veterinary Sciences, Vol. 6, Issue 1 · 25 May 2011 · 7,438 accessesView PDFCite
Research ArticleOpen accessIn the keywordsA Study of Residual Oils Recovered from Spent Bleaching Earth: Their Characteristics and ApplicationsLoh Soh Kheang, Cheng Sit Foon, Choo Yuen May, Ma Ah NganThis study described the extraction of residual oils of spent bleaching earth (SBE) from palm oil refining industry, the properties and applications of residual oils obtained there from. Residual oils of SBE (acid-activated, WAC and neutral, NC) were recovered via solvent and supercritical-fluid (SC-CO2) extraction. The yields of residual oils recovered from WAC were higher than those from NC using … …American Journal of Applied Sciences, Vol. 3, Issue 10 · 31 Oct 2006 · 9,231 accessesView PDFCite
Research ArticleOpen accessIn the keywordsExperimental Study of Diesel Engine Generator Performance and Emission Characteristics Using a Mixture of Jatropha Oil and Rubber Seed Oil Biodiesels Along a Two-Step TransesterificationFana Gebremedhin Gebremichael, Joao Fernando ChidamoioThis study investigates the performance and emission properties of engine-generator powered using various dual biodiesel mixes prepared from two inedible feedstock jatropha and rubber. Jatropha and rubber oils had high acid values, which were 13.96 and 27.91 mg KOH/g, respectively. Therefore, a two-step transesterification process was conducted to lower the acid value to 0.28 and 0.42 mg KOH/g for jatropha … …American Journal of Engineering and Applied Sciences, Vol. 17, Issue 3 · 1 Jul 2024 · 5,124 accessesView PDFCite
Research ArticleOpen accessIn the keywordsEffect of Edible Coatings, Storage Time and Maturity Stage on Overall Quality of Tomato FruitsJorge Esteban de Jesús Dávila-Aviña, José Villa-Rodríguez, Reynaldo Cruz-Valenzuela et al.Problem statement: Tomato (Lycopersicon esculentum Mill.) is one of the most widely consumed fresh vegetables in the world; however, its highly perishable nature limits its postharvest life. Major losses in tomato quality and quantity occur between harvest and consumption. Therefore, the application of new technologies to extend the postharvest life of this commodity is needed. The use of edible coatings … …American Journal of Agricultural and Biological Sciences, Vol. 6, Issue 1 · 14 Mar 2011 · 11,286 accessesView PDFCite
Research ArticleOpen accessIn the keywordsMethanol-Based Transesterification Optimization of Waste Used Cooking Oil over Potassium Hydroxide CatalystCholada Komintarachat, Sathaporn ChuepengProblem statement: Waste used Cooking Oil (WCO) harmfully affected to environment and human’s health can be a feedstock for producing biodiesel. Approach: The conversion of Fatty Acid and Free Fatty Acid (FFA) of WCO with 15.0% w/w FFA content to biodiesel was studied through transesterification reactions. This work investigated the effects of alcohol and catalyst quantity, reaction time and temperature … …American Journal of Applied Sciences, Vol. 7, Issue 8 · 31 Aug 2010 · 9,739 accessesView PDFCite
Research ArticleOpen accessIn the author namesStroke Associated with Infective Endocarditis. Frequency and Prognostic ImplicationsJuan José Mengual Chirife, Manuel Gómez-Choco, Ester MoralStroke can be one of the most severe complications of Infective Endocarditis (IE) and it happens in 14% of patients with IE. Therefore, we aimed to review stroke frequency in patients diagnosed with IE in our hospital from 2010 to 2020. We defined it as IE-Associated Stroke (IEAS) when the stroke happened one month before or after IE's diagnosis. Sixty-six … …American Journal of Infectious Diseases, Vol. 17, Issue 4 · 7 Sep 2021 · 6,860 accessesView PDFCite
Research ArticleOpen accessIn the author namesThe Characterization of Bacillus thuringiensis from soil habitat of Auky Island, Padaido District in Biak Numfor Regency and Its Toxicity against Mosquito Larva of Anopheles spLantang Daniel, Rampa Ester, Lunga NellyBacillus thuringiensis (Bt) is bacteria that produce protein crystals as an insecticidal against various vector diseases in plants and animals including humans. The purpose of this research is to discover the local isolate toxicity of B. thuringiensis from Auky Island Padaido District in Biak Numfor Regency against mosquito larva Anopheles sp., as well as to discover the local isolate of … …American Journal of Infectious Diseases, Vol. 14, Issue 2 · 4 Sep 2018 · 9,147 accessesView PDFCite
Research ArticleOpen accessIn the author namesE-Learning Practices on Healthcare Associated Infections (HAI): Report of Brazilian ExperienceEduardo Alexandrino Servolo Medeiros, Fernando Gatti De Menezes, Carla Morales Guerra et al.To develop a teaching and learning environment, on-line and free, to provide technical information with health professional team from Epidemiological Health Surveillance and Nosocomial Infection Control Groups in Brazil. The first Brazilian experience of e-learning was carried out through a partnership between the National Health Surveillance Agency (ANVISA) and Federal University of São Paulo (UNIFESP). The course supported by different … …American Journal of Infectious Diseases, Vol. 4, Issue 4 · 31 Dec 2008 · 7,382 accessesView PDFCite