66 research outputs found

    Produksi Biodiesel dari Minyak Nyamplung (Callophyllum Inophyllum) Menggunakan Katalis Lantanum/Lempung : Studi Pemgaruh Suhu Reaksi

    Full text link
    Biodiesel is an alternative energy to replace fossil fuels. It can be synthesized by transesterification process of palm oils. Commonly the process of producing biodiesel was used NaOH or KOH as homogeneous catalyst which has the disadvantage the formation of side products such as soaps and complexity of the separation of catalyst. Several research have developed that using heterogeneous catalys. Synthesis of biodiesel from callophyllum inophyllum oil using metal alloys lanthanum on clay as catalyst. This research studied the effect of temperature reaction with variations 55, 60, 65 oC to the yield of biodiesel produced, and to identifying the characteristics of biodiesel produced. This study begins activation of the catalyst in a way additions H2SO4, impregnation, calcination, oxidation and reduction. Furthermore, to remove impurities and gum contained in the oil was done the degumming process. After that, do the process of transesterification in the three neck flask reactor the mole ratio of methanol : oil 12: 1 and a reaction time 120 minutes. The result, highest biodiesel obtained amounted to 78.41% at the reaction temperature of 60 oC. Physical characterization of biodiesel were done such as density 857 kg/m3, kinematic viscosity 4.735 mm2/s, acid number 0.61 mg-KOH/g biodiesel and flash point 127.5 oC respectively which have accordance with the standards of Indonesian biodiesel (SNI 04-1782-2006)

    Pengaruh Kecerdasan Emosional, Kecerdasan Intelektual, Kecerdasan Spritual Dan Komitmen Organisasi Terhadap Kinerja Auditor

    Full text link
    The aims of this study is to determine: 1. impact of emotional intelligent on auditor's performance 2. impact of intellectual intelligent on auditor's performance 3. impact of spiritual intelligent on auditor's performance 4. impact of organizational commiment on auditor's performance. This study was classified as causative study. The Population of this study were auditors on CPA firm.The sample are auditors on CPA firm in Padang, Pekanbar and Batam. The collection technique of this study was the technique of survey by distributing queationnaires directly to each auditors on CPA firm. Studies show that: 1. emotional intelligent had a significant positive impact on auditor performance 2. intellectual intelligence had a significant positive impact on auditor performance 3. spiritual intelligence had a significant positive impact on auditor performance. 4. Organizational commitment had a significant positive impact on auditor performance. 1. Sample of this study was limited to the auditors on CPA firm in Padang, Pekanbar and Batam. The result might be different if the sample were expanded. 2. the auditors on CPA firm should always pay attention to improve balance between emotional, intellectual, spiritual intelligence and also proffesional ethics to achieve more maximum performance

    Pirolisis Kulit Kayu Pinus Merkusii Menjadi Bio-Oil Menggunakan Katalis Cr/Lempung Cengar

    Full text link
    Bio-oil is produced from biomass through pyrolysis. Then, potential biomass is bark of pine. Bark of pine merkusii can be processed into bio-oil by pyrolysis used Cr/clay catalyst. This research aims to produce bio-oil from bark of pine with Cr/clay catalyst as an alternative fuel, observing the effect of the ratio of catalyst Cr/clay weight to biomass, and observing the influence of Chromium (Cr) impregnation and characterizing physical and chemical characteristic of bio-oil. In the pyrolysis process, 50 grams of pine bark with -100 + 200 mesh, the Cr / clay catalyst with weight variation of the biomass are 3%, 5% and 7% and the variation of Chromium (Cr) impregnation on clay are 0%, 1%, 2% and 3%. And 500 ml of silinap was added to the pyrolysis reactor. Pyrolysis process occurred for 120 minutes at a 320o C and the stirring speed is about 300 rpm. This research resulted in the greatest yield on the use of Cr/clay catalysts 7% of weight to the biomass and 3% metal content is about 65.77%. Characteristics of physical properties was obtained 0.812 g / ml of density, 0.902 cSt of viscosity, 7.626 mg NaOH / gram samples of acidity and 31oC of flash point. While the chemical characteristics of the bio-oil was obtained from the analysis using Gas Chromatography-Mass Spectroscopy (GCMS) and it found several dominant chemical components such as 9,12-Octadecadienoyl chloride, Cyclohexane, 1-methyl-2-penthyl, Octadecanoic acid, 2-Pentene, 24.4-trimethyl and Cyclohexane, 3- (3,3-dimethylbutyl)

    Gamma-irradiated influenza A virus provides adjuvant activity to a co-administered poorly immunogenic SFV vaccine in mice

    Get PDF
    Many currently available inactivated vaccines require "adjuvants" to maximize the protective immune responses generated against the antigens of interest. Recent studies in mice with gamma-irradiated influenza A virus (γ-FLU) have shown its superior efficacy compared to other forms of inactivated FLU vaccines and its ability to induce both potent interferon type-I (IFN-I) responses and the IFN-I-associated partial lymphocyte activation. Commonly, IFN-I responses induced by adjuvants, combined in vaccine preparations, have been shown to effectively enhance the immunogenicity of the antigens of interest. Therefore, we investigated the potential adjuvant activity of γ-FLU and the possible effect on antibody responses against co-administrated antigens, using gamma-irradiated Semliki Forest virus (γ-SFV) as the experimental vaccine in mice. Our data show that co-vaccination with γ-FLU and γ-SFV resulted in enhanced SFV-specific antibody responses in terms of increased titers by sixfold and greater neutralization efficacy, when compared to vaccination with γ-SFV alone. This study provides promising evidence related to the possible use of γ-FLU as an adjuvant to poorly immunogenic vaccines without compromising the vaccine efficacy of γ-FLU.Rachelle Babb, Jennifer Chan, Jasmine E. Khairat, Yoichi Furuya and Mohammed Alsharif

    Physician experiences of screen-level features in a prominent electronic health record: Design recommendations from a qualitative study

    Get PDF
    The goal of this qualitative study was to assess physicians’ perceptions around features of key screens within a prominent commercial EHR, and to solicit end-user recommendations for improved retrieval of high-priority clinical information. We conducted a qualitative, descriptive study of 25 physicians in a medical ICU setting. at a tertiary academic medical center. An in-depth, semi-structured interview guide was developed to elicit physician perceptions on information retrieval as well as favorable and unfavorable features of specific EHR screens. Transcripts were independently coded in a qualitative software management tool by at least two trained coders using a common code book. We successfully obtained vendor permission to map physicians perception’s on full Epic© screenshots. Among the 25 physician participants (13 female; 5 attending physicians, 9 fellows, 11 residents), the majority of participants reported experiencing challenges finding clinical information in the EHR. We present the most favorable and unfavorable screen-level features for four central EHR screens: Flowsheet, Notes/Chart Review, Results Review, and Vital Signs. We also compiled participants’ recommendations for a comprehensive EHR dashboard screen to better support clinical workflow and information retrieval in the medical ICU through User-Centered Design. ICU physicians demonstrated a mix of positive and negative attitudes toward specific screen-level features in a major vendor-based EHR system. Physician perceptions of information overload emerged as a theme across multiple EHR screens. Our findings underscore the importance of qualitative research and end-user feedback in EHR software design and interface optimization at both the vendor and institutional level

    Evaluation of Patient Experience During Virtual and In-Person Urgent Care Visits: Time and Cost Analysis

    Get PDF
    Urgent care (UC) is one of the fastest growing venues of health care delivery for nonemergent conditions. This study compared the patient experience during virtual and in-person urgent care visits. We conducted a cross-sectional study of patients with the same diagnosis during Virtual Urgent Care (VUC) and in-person UC visits with the same diagnosis with regard to time and cost over a period of one year. We recorded and analyzed 16 685 urgent care visits: In-person UC (n = 14 734), VUC (n = 1262). Significant differences were found in the average total time for a visit in an in-person UC (70.89 minutes), and VUC (9.38 minutes). The average total cost of VUC (49)andin−personUC(49) and in-person UC (142.657) differed significantly. Significant difference was found between UC turnaround time and VC turnaround time (Dependent variable (DV): 53.77, P <.01). We found significant differences in cost and time between in favor of virtual visits. Our findings suggest additional policy reform to expand the use of virtual care among target populations to improve access, reduce costs, meet the needs of patients, and reduce emergency department visits

    New insights into the Tyrolean Iceman's origin and phenotype as inferred by whole-genome sequencing

    Get PDF
    The Tyrolean Iceman, a 5,300-year-old Copper age individual, was discovered in 1991 on the Tisenjoch Pass in the Italian part of the Otztal Alps. Here we report the complete genome sequence of the Iceman and show 100% concordance between the previously reported mitochondrial genome sequence and the consensus sequence generated from our genomic data. We present indications for recent common ancestry between the Iceman and present-day inhabitants of the Tyrrhenian Sea, that the Iceman probably had brown eyes, belonged to blood group O and was lactose intolerant. His genetic predisposition shows an increased risk for coronary heart disease and may have contributed to the development of previously reported vascular calcifications. Sequences corresponding to similar to 60% of the genome of Borrelia burgdorferi are indicative of the earliest human case of infection with the pathogen for Lyme borreliosis
    • …
    corecore