Biodiesel, or alkyl ester, is an alternative renewable, biodegradable, and nontoxic diesel fuel produced by the catalytic transesterification of vegetable oil. Here we characterize a system for continuous transesterification of vegetable oil using five continuous stirring tank reactors (5CSTRs). We tested residence times of 16-43min, stirring speeds of 200-800rpm, a catalyst concentration (KOH) of 0.25-1 wt% of oil (in gram), different total flow rates of the oil and MeOH, and on the production performance of the 5 stage continuous reactor for transesterification of vegetable oil. Using a molar ratio of oil:methanol of 1:7 and a reaction temperature of 65 °C, we show that a high stirring speed increased the reaction rate, but an excessive stir speed decreased the reaction rate and conversion to biodiesel. Furthermore, a higher catalyst percentage significantly increased the reaction rate and production capacity. A catalyst percentage of 1 wt% of oil gave the best conversion; 99.04 ± 0.05%. The resulting biodiesel esters were characterized for their physical and fuel properties including density, viscosity, iodine volume, acid volume, cloud point, pure point, gross heat of combustion, and volatility. The purity and conversion of the biodiesel was analyzed by HPLC.
Domestic violence against women remains one of the most difficult obstacles in the growth of civilization. The maxillofacial region is commonly involved, and injuries are complex to characterize and manage due to diverse presentations, underlying physiological changes and sometimes an association with pregnancy complications, creating a challenge for the operating surgeon. This case report discusses the clinical presentation of maxillofacial injuries sustained by a pregnant woman who also had obstetric complications. The management of such trauma by a multidisciplinary squad led by the maxillofacial surgery team is outlined. Increasing awareness among oral healthcare providers for the early identification of interpersonal abuse along with timely intervention and adequate referral is important. Close monitoring and follow-up are also mandatory.
Introduction: Mumps is a self-limiting viral infection of the salivary glands with systemic manifestations and complications. It primarily affects young children, with increased incidence in winter and spring. Mumps infection is endemic in developing countries because of poor vaccination coverage. This study is intended to highlight the increased number of mumps cases in children attending tertiary care center in Nepal and thus to emphasize the importance of mumps vaccination, so as to decrease the disease occurrence and disease burden by vaccinating all children. Materials and Methods: This was a prospective study done in Civil Service Hospital of Nepal over a period of 2 years from November 2009 to October 2011. All children less than 14years of age with symptoms of fever and parotid swelling were included in the study group. A detailed history pertaining to the disease was taken, that included; history of exposure and prior vaccination against mumps. Children were asked to follow up either after 5 days or in case of noticing any signs and symptoms of complication. Results: There were total 113 cases diagnosed clinically as mumps of which there were 71 males (62.83%) and 42 females (37.16%) with the peak incidence of disease in the month of March and September with 22 cases (19.46%) in each month. The increase incidence was seen in 4-6 years of age with 58 cases (51.32%). There were 70 patients (61.94%) that had history of exposure to mumps infection. All the patients in this study had either unilateral or bilateral parotitis. None of the children were vaccinated against mumps. And all the school going children had to be off school for a period of 3-5 days. Conclusion: There were large number of children with mumps and none of them were vaccinated. Child can be prevented from the infection by vaccination and thus avoiding possible sufferings and complications. Thus we recommend the use of mumps vaccination in Routine immunization programme. Key words: Mumps; Parotitis; School absenteeism; Nepal; Vaccine DOI: http://dx.doi.org/10.3126/jnps.v32i1.5499 J. Nepal Paediatr. Soc. Vol.32(1) 2012 53-56
Submission of an original paper with copyright agreement and authorship responsibility.I (corresponding author) certify that I have participated sufficiently in the conception and design of this work and the analysis of the data (wherever applicable), as well as the writing of the manuscript, to take public responsibility for it. I believe the manuscript represents valid work. I have reviewed the final version of the manuscript and approve it for publication. Neither has the manuscript nor one with substantially similar content under my authorship been published nor is being considered for publication elsewhere, except as described in an attachment. Furthermore I attest that I shall produce the data upon which the manuscript is based for examination by the editors or their assignees, if requested.Thanking you.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.