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Electrolysis results in a comparison of metformin using aluminum, zinc, and iron (as the anode) as well as used carbon (as the cathode)

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Journal of Physics: Conference Series 2020年第1期1524卷

作者： S Suhartana P Purwanto A Darmawan Doctoral Program in Environmental Science School of Postgraduate Studies Universitas Diponegoro Semarang Indonesia Departement of Chemistry Faculty of Engineering Universitas Diponegoro Semarang Indonesia Inorganic Chemistry Laboratory Departement of Chemistry Faculty of Sciences and Mathematics Universitas Diponegoro Semarang Indonesia

Metformin is an antidiabetic drug that can be obtained easily in pharmacies/on the market, because it is traded freely, so people can easily buy and consume it. Ferrous metal, aluminum metal, and zinc metals are metal quite easy to find and are often used by the public. Metformin and Ferrous metal, aluminum metal and zinc metals are metal are quite familiar in the community. This research aims to deconcentrate metformin which can be obtained easily in pharmacies / on the market by electrolysis method, using ferrous metal, aluminum metal, and zinc metals are as an anode and carbon as the cathode. Electrolysis of metformin has been carried out using ferrous metal, aluminum metal, and zinc metal as an anode. The success of the electrolysis process was seen with a decrease in the sample COD index. In the case without the addition of electrolytes using ferrous metals, the COD index of the sample reduction was very low (9-17%). This research aims to increase the success of the electrolysis process, by adding various kinds of electrolytes, such as acetic acid (weak electrolytes), hydrochloric acid (strong electrolytes), sodium chloride and Fenton reagents. The addition of electrolytes can increase electrolysis yield significantly. The interaction between metformin during electrolysis is traced to the possibility of changes in the chromophore group (with UV-Visible spectra) and the functional group (with FTIR spectra) of the sample. From the research data obtained information that there is a decrease and shift in UV-Visible spectra and changes in functional groups after the electrolysis process occurs. The best electrolysis percentage is obtained, after adding NaCl solution and Fenton's reagent in the range of 50 -66%.

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Extraction and characteristic of Dioscorea alata mucilage

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IOP Conference Series: Earth and Environmental science 2020年第1期542卷

作者： D Fortuna S S Mardjan T C Sunarti E Darmawati S M Widayati N Purwanti Doctoral Program in Agricultural Engineering Science Department of Mechanical and Biosystem Engineering Bogor Agricultural University Bogor Indonesia Department of Mechanical and Biosystem Engineering Bogor Agricultural University Bogor Indonesia Department of Agricultural Industry Technology Bogor Agricultural University Bogor Indonesia Indonesia Center for Agricultural Postharvest Research and Development (ICAPRD) Bogor Indonesia

Dioscorea alata (DA) mucilage is classified as water-soluble polysaccharides, which has potential as a source of hydrocolloid. This research was conducted to investigate effects of salt types on water to tuber ratio to produce the most optimal mucilage yield. This research was conducted using Completely Randomized Factorial Design 3 x 5. The DA mucilage was extracted using two factors, i.e., types of salt (without salt, sodium chloride, and calcium chloride) and water to tuber ratios (2:1, 4:1, 6:1, 8:1, and 10:1). The results showed that the types of salt significantly affect (P<0.05) on starch content, but did not have a significant effect on mucilage yield and water content of the mucilage. The water to tuber ratios significantly affected (p<0.05) the mucilage yield and starch content of the mucilage, however it did not affect the water content. Addition of calcium chloride when water to tuber ratio was 4:1 was recommended to produce the optimal mucilage yield (1.58%) with relatively low starch content (7.86%).

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Improving student's complex problem solving through LAPS-Talk-Ball learning integrated with interactive games

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Journal of Physics: Conference Series 2021年第1期1722卷

作者： A M I T Asfar A M I A Asfar S Sulastri Department of Mathematics Education STKIP Muhammadiyah Bone Abu Dg. Pasolong Street No.62 Watampone Indonesia Doctoral Program Science Education Universitas Negeri Makassar Bonto Langkasa street Makassar Indonesia Department of Chemical Engineering State Polytechnic of Ujung Pandang Tamalanrea Makassar Indonesia Department of Economics Education STKIP Muhammadiyah Bone Abu Dg. Pasolong Street No.62 Watampone Indonesia

One of the competencies needed currently is non-routine competency in solving a complex problem. Students with complex problem solving will be able to identify the complex problem, understand to review related information, and create solutions for the problems. However, the improvement of complex problem-solving abilities lacks attention. This phenomenon occurs when students are given problem-solving, students have not been able to understand the problem, plan solutions, and provide solutions to problems. To overcome these problems, the LAPS-Talk-Ball learning model integrated with interactive games that guide the students in solving problems was implemented by using interactive games and speech balloons to stimulate each student to express their ideas. This research is quantitative experimental research to determine the success of the LAPS-Talk-Ball learning model integrated with android-based interactive games in training complex problem-solving students using saturated sampling and non-equivalent control group research designs. From the results of gain test results high improvement category, which means that the LAPS-Talk-Ball learning model integrated with android-based interactive games can train the complex problem-solving abilities of students.

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Knowledge, Awareness, and Resilience of Earthquake and Tsunami Disaster Risk Reduction in Coastal Area

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Journal of Physics: Conference Series 2021年第1期1811卷

作者： Rr M I Retno Susilorini Rina Febrina Helmia Adita Fitra Juniastel Rajagukguk Dhiyan Krishna Wardhani B Y Arya Wastanimpuna Laurel Lia Nola Prameswari Department of Infrastructure and Environmental Engineering Faculty of Environmental Science and Technology Soegijapranata Catholic University Semarang 50234 Central Java Indonesia Department of Civil Engineering Faculty of Engineering Malahayati University Bandar Lampung 35153 South Sumatera Indonesia Department of Regional and Urban Planning Sumatera Institute of Technology South Lampung 35365 South Sumatera Indonesia Department of Physics Faculty of Mathematics and Natural Sciences Universitas Negeri Medan Medan 20221 North Sumatera Indonesia Doctoral Program of Digital Architecture Faculty of Architecture and Design Soegijapranata Catholic University Semarang 50234 Central Java Indonesia

Indonesia is earthquake and tsunami prone areas, included Sumatera Island. Bandar Lampung is also vulnerable to earthquake and tsunami, especially Kangkung fishing village in Lampung Bay. Disaster risk reduction is very important to be implemented in the cases of earthquake and tsunami, which can save more life and build resilience in facing the hazard. This research aimed to study how the knowledge, awareness, and resilience of people in Kangkung fishing village can strengthen the earthquake and tsunami disaster risk reduction. This research conducted by quantitative methods. Survey and interview of 53 respondents were conducted as well as data collecting approached by purposive sampling. The results found that there is little knowledge and awareness of people in Kangkung fishing village of the hazard of earthquake and tsunami. Therefore, this research proposed a model of 'Community-Based Resilience Strategy' Model of earthquake and tsunami disaster risk reduction. It is a comprehensive and sustainable model of how people take a part in disaster risk reduction by intensive participatory. Conclusion of this research emphasized that disaster risk reduction is a big matter in marginalized society such as people in Kangkung fishing village. The 'Community-Based Resilience Strategy' Model of earthquake and tsunami disaster risk reduction that may increase the knowledge and awareness to become more resilience.

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Thermoelectric Properties of Misfit Layered Bismuth-Based Rhodium Oxides, (Bi,Pb)2Sr2Rh2Oy

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Journal of Materials science and Chemical engineering 2018年第7期6卷 97-103页

作者： Takuya Watanabe Hiroshi Irie Special Doctoral Program for Green Energy Conversion Science and Technology Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi Yamanashi Japan Clean Energy Research Center University of Yamanashi Yamanashi Japan

Rhodium oxides, including a misfitlayered structure with alternate stacking of a rock salttype layer and a hexagonal RhO2 layer, are expected to have good thermoelectric properties. Among them, the thermoelectric properties (electrical conductivity (σ), Seebeck coefficient (S), Figure of merit (ZT) and calculated thermal conductivity (κ) by S, σ, ZT, and absolute temperature (T)) of bismuth-based rhodium oxides ((Bi1-x,Pbx) 2Sr2Rh2Oy, x = 0 and 0.02, hereafter BSR and BPSR, respectively) were investigated. In comparison with Bi2Sr2Co2Oy (BSC) at 700°C, S and κ enhanced (increased S, 110 (BSR) and 105 μV K-1 (BPSR) from 85 μV K-1 (BSC) and decreased κ, 0.32 (BSR) and 0.50 W m-1 K-1 (BPSR) from 1.75 W m-1 K-1 (BSC)), whereas σ decreased (15 (BSR) and 31 S cm-1 (BPSR) from 70 S cm-1 (BSC)). BPSR reached the highest ZT value of 0.067 at 700°C, compared to those of 0.056 (BSR) and 0.027 (BSC).

关键词： Electroceramics Layered Rhodium Oxide Misfit Layer Structure Thermoe-lectric Material Harman Method

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Thermodynamic Analysis of Two-Phase Ejector as Expansion Device with Dual Evaporator Temperatures on Split Type Air Conditioning Systems

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IOP Conference Series: Materials science and engineering 2019年第1期494卷

作者： M E Arsana I G B Wijaya Kusuma M Sucipta I N Suamir Doctoral Engineering Science study Program Faculty of Engineering Udayana University Denpasar Bali Indonesia Mechanical Engineering Department Bali State Polytechnic Bali 80364 Indonesia

This paper presents a numerical and experimental study of increasing the performance coefficient (COP) of split AC (SAC) by reducing compressor work and increasing cooling capacity. Two phase ejector as an expansion device with a new design of dual evaporator temperature used. numerical methods apply the mathematical model developed in the EES software that is applied. Thermodynamic analysis is carried out to achieve ASHRAE Standard requirements for a minimum SAC with COP application of 3.5. The SAC system is filled with R-290 as a thermal fluid medium. Based on the simulation results a numerical model of the ejector is then produced and installed in a modified SAC system of cooling capacity of at least 9000 BTU/hour. An experimental test was conducted to investigate the actual performance of the ejector and its effect on the performance of the SAC system. The results showed that the two phase ejector with the new design of the dual evaporator temperature system was successful. When compared to standard split air conditioners using capillary tube expansion devices the tested ejector system contributes around 35% of power savings. The COP of the system can reach 5.5 which accounts for 39% of the increase in performance.

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Effect of various commercial of Na2SiO3 on compressive strength of Fly ash-based alkaline activated mortar

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IOP Conference Series: Materials science and engineering 2020年第1期801卷

作者： Otman M. M. Elbasir M.J.A. Mijarsh Megat Azmi Megat Johari Mohamed O. M. Mashri Rahmi Karolina Zainal Arifin Ahmad High Institute of Science and Technology Civil Engineering Department Qaser bin Gashear (Libya). Civil Engineering Department Faculty of Engineering Elmergib University Al-Khums (Libya). School of Civil Engineering Engineering Campus Universiti Sains Malaysia 14300 NibongTebal Penang (Malaysia). Doctoral Program of Civil Engineering Department Universitas Sumatera Utara (Indonesia). Structural Materials Niche Area School of Materials and Mineral Resources Engineering Universiti Sains Malaysia 14300 NibongTebal Penang (Malaysia).

This study aimed to assesses the effect of various commercial Na2SiO3 on the compressive strength (CS) of alkaline activated fly ash mortar (AAFM). The three mixture of alkaline activated mortar (AAM) C1, C2 and C3 were prepared from the source material of fly ash and alkaline activator solution (AAS). The initial AAS was comprised of NaOH (10M) and various grade of Na2SiO3. The various grades of Na2SiO3 were characterized by their SiO2/Na2O molar ratio of 2.0, 2.2, and 3.3, respectively. The sample from each mixture was characterized based on the CS and microstructure changes using useful tools of XRD and FTIR analysis. The results obtained indicated that the highest CS achieved among the three mixtures were 48.23MPa of mixture C2 prepared with SiO2/Na2O molar ratio of 2.2. This was mainly due to higher binder formation (N-A-S-H gel type) and a higher rate of reaction of the main source material. This result is in line with XRD and FTIR analysis results finding.

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Polymer of chitosan with ZnO addition to optimize high responsivity and sensitivity in sensor film

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AIP Conference Proceedings 2020年第1期2267卷

作者： Saisa H. Agusnar Z. Alfian I. Nainggolan 1Doctoral Program Department of Chemistry Faculty of Mathematics and Natural Science Universitas Sumatera Utara Medan 20155 North Sumatera Indonesia 2Department of Chemical Engineering Faculty of Engineering Universitas Serambi Mekkah Banda Aceh 23245 Aceh Indonesia 3Department of Chemistry Faculty of Mathematics and Natural Science Universitas Sumatera Utara Medan 20155 North Sumatera Indonesia

Coating of polymer chitosan as sensor film on copper electrode substrate (Cu) has become a concern of research development to improve responsivity, sensitivity, and economic value to detect hazardous preservatives in food, especially formalin. This study aims to enhance the activities of sensor for more responsive and higher sensitivity by adding metal oxide as an active agent. Chitosan thin film is prepared by 1.5% chitosan dissolved with 2% acetic acid and modified with active compound ZnO. The addition of ZnO NPs metal oxide is to improve sensitivity which viewed from SEM characterization results, the surface of morphology is smoother and flat on the surface of chitosan. Characterization of FT-IR showed ZnO was perfectly bound to amine bond of chitosan structure. The research method was conducted by cyclic voltammetry analysis to find out the results test of sensor sensitivity. The results showed chitosan-ZnO film sensor provides the best sensitivity on modification conditions of ZnO NPs 0.6% and 0.8%. Linearity analysis of sensor provides ideal value obtained at R-square value of 0.9886. Thus, it can be concluded that chitosan-ZnO thin-film sensor is hugely responsive to be used as an electrode sensor for detecting hazardous chemical compounds in food. Chitosan-ZnO film sensor can provide high activity as a biosensor electrode for detecting harmful compounds in foods that are sensitive, responsive, and has economic value.

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Fungal diversity notes 1151-1276:taxonomic and phylogenetic contributions on genera and species of fungal taxa

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Fungal Diversity 2020年第1期100卷 5-277页

作者： Kevin DHyde Yang Dong Rungtiwa Phookamsak Rajesh Jeewon DJayarama Bhat EBGareth Jones Ning‑Guo Liu Pranami DAbeywickrama Ausana Mapook Deping Wei Rekhani HPerera Ishara SManawasinghe Dhandevi Pem Digvijayini Bundhun Anuruddha Karunarathna Anusha HEkanayaka Dan‑Feng Bao Junfu Li Milan CSamarakoon Napalai Chaiwan Chuan‑Gen Lin Kunthida Phutthacharoen Sheng‑Nan Zhang Indunil CSenanayake Ishani DGoonasekara Kasun MThambugala Chayanard Phukhamsakda Danushka STennakoon Hong‑Bo Jiang Jing Yang Ming Zeng Naruemon Huanraluek Jian‑Kui(Jack)Liu Subodini NWijesinghe Qing Tian Saowaluck Tibpromma Rashika SBrahmanage Saranyaphat Boonmee Shi‑Ke Huang Vinodhini Thiyagaraja Yong‑Zhong Lu Ruvishika SJayawardena Wei Dong Er‑Fu Yang Sanjay KSingh Shiv Mohan Singh Shiwali Rana Sneha SLad Garima Anand Bandarupalli Devadatha MNiranjan VVenkateswara Sarma Kare Liimatainen 馻‑ Tuula Niskanen Andy Overall Renato Lúcio Mendes Alvarenga Tatiana Baptista Gibertoni Walter PPfliegler EnikőHorváth Alexandra Imre Amanda Lucia Alves Ana Carla da Silva Santos Patricia Vieira Tiago Timur SBulgakov Dhanushaka NWanasinghe Ali HBahkali Mingkwan Doilom Abdallah MElgorban Sajeewa SNMaharachchikumbura Kunhiraman CRajeshkumar Danny Haelewaters Peter EMortimer Qi Zhao Saisamorn Lumyong Jianchu Xu Jun Sheng Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201YunnanChina State Key Laboratory for Conservation and Utilization of Bio‑Resources in Yunnan Yunnan Agricultural UniversityKunming 650201China Yunnan Research Institute for Local Plateau Agriculture and Industry Kunming 650201China Key Laboratory for Agro‑biodiversity and Pest Control of Ministry of Education Yunnan Agricultural UniversityKunming 650201China Center of Excellence in Fungal Research Mae Fah Luang UniversityChiang Rai 57100Thailand East and Central Asia Regional Office World Agroforestry Centre(ICRAF)Kunming 650201YunnanChina Centre for Mountain Futures(CMF) Kunming Institute of BotanyKunming 650201YunnanChina Mushroom Research Foundation 128 M.3 Ban Pa Deng T.Pa PaeA.Mae TaengChiang Mai 50150Thailand Department of Health Sciences Faculty of ScienceUniversity of MauritiusReduitMauritius No.128/1‑J Azad Co‑Op Housing SocietyCurcaGoa Velha 403108India Department of Entomology and Plant Pathology Faculty of AgricultureChiang Mai UniversityChiang Mai 50200Thailand Department of Botany and Microbiology College of ScienceKing Saud UniversityP.O.Box 2455Riyadh 11451Kingdom of Saudi Arabia School of Science Mae Fah Luang UniversityChiang Rai 57100Thailand Faculty of Agriculture National Resources and EnvironmentNaresuan UniversityPhitsanulok 65000Thailand Beijing Key Laboratory of Environment Friendly Management on Fruit Diseases and Pests in North China Institute of Plant and Environment ProtectionBeijing Academy of Agriculture and Forestry SciencesBeijing 100097China Department of Soil Ecology UFZ-Helmholtz Centre for Environmental ResearchHalleGermany Guizhou Key Laboratory of Agricultural Biotechnology Guizhou Academy of Agricultural SciencesGuiyang 550006GuizhouChina Shenzhen Key Laboratory of Microbial Genetic Engineering College of Life Sciences and OceanographyShenzhen UniversityShenzhen 518060China Department of Plant M

Fungal diversity notes is one of the important journal series of fungal taxonomy that provide detailed descriptions and illustrations of new fungal taxa,as well as providing new information of fungal taxa *** article is the 11th contribution to the fungal diversity notes series,in which 126 taxa distributed in two phyla,six classes,24 orders and 55 families are described and *** in this study were mainly collected from Italy by Erio Camporesi and also collected from China,India and Thailand,as well as in some other European,North American and South American *** described in the present study include two new families,12 new genera,82 new species,five new combinations and 25 new records on new hosts and new geographical distributions as well as sexual-asexual *** two new families are Eriomycetaceae(Dothideomycetes,family incertae sedis)and Fasciatisporaceae(Xylariales,Sordariomycetes).The twelve new genera comprise Bhagirathimyces(Phaeosphaeriaceae),Camporesiomyces(Tubeufiaceae),Eriocamporesia(Cryphonectriaceae),Eriomyces(Eriomycetaceae),Neomonodictys(Pleurotheciaceae),Paraloratospora(Phaeosphaeriaceae),Paramonodictys(Parabambusicolaceae),Pseudoconlarium(Diaporthomycetidae,genus incertae sedis),Pseudomurilentithecium(Lentitheciaceae),Setoapiospora(Muyocopronaceae),Srinivasanomyces(Vibrisseaceae)and Xenoanthostomella(Xylariales,genera incertae sedis).The 82 new species comprise Acremonium chiangraiense,Adustochaete nivea,Angustimassarina camporesii,Bhagirathimyces himalayensis,Brunneoclavispora camporesii,Camarosporidiella camporesii,Camporesiomyces mali,Camposporium appendiculatum,Camposporium multiseptatum,Camposporium septatum,Canalisporium aquaticium,Clonostachys eriocamporesiana,Clonostachys eriocamporesii,Colletotrichum hederiicola,Coniochaeta vineae,Conioscypha verrucosa,Cortinarius ainsworthii,Cortinarius aurae,Cortinarius britannicus,Cortinarius heatherae,Cortinarius scoticus,Cortinarius subsaniosus,Cytospora fusispor

关键词： 96 new taxa Agaricomycetes Ascomycota Basidiomycota Dothideomycetes Lecanoromycetes Leotiomycetes Pezizomycetes Phylogeny Saccharomycetes Taxonomy

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Assessment on Improvement of Early Detection Systems in Electrical Rooms of High-Tech Facilities

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Procedia engineering 2018年 211卷 235-246页

作者： Yu-Jen Chen Chi-Min Shu San-Ping Ho Hsin-Hsiu Ho Hue-Pei Chang Doctoral Program Graduate school of Engineering Science and Technology National Yunlin University of Science and Technology Douliou Yunlin Taiwan 64002 Department of Safety Health and Environmental Engineering YunTech Douliou Yunlin Taiwan 64002 Department of Occupational Safety and Health Chang Jung Christian University Tainan Taiwan 71101

Past air sampling detection (ASD) systems had no definitive positioning; most allocation of sampling points was based on experience. This research discovered that sampling points inside the electrical rooms were significantly affected by the ambient airflow, causing the detection system to have difficulties in fire detection. Fire dynamics simulator (FDS) was used to simulate very early smoke detection apparatus (VESDA) effectiveness within the protection area of an electrical room. Results showed that ASD sampling points in electrical rooms should be placed above high-voltage transformers and capacitors, while rearranging the high risk machines together to avoid long detection pipelines, which increases the transportation time of the gas, thus hindering early detection by the ASD system. Field tests using a smoke detector tester yielded transportation times of 33 s, which was in very good agreement with the simulated results of 35 s by ASPIRE, showing the accuracy of using software to simulate transportation times. Therefore, this research combined FDS with the transportation times of different pipeline designs to conduct performance assessment of VESDA. After appropriate rearrangement of machines, VESDA detection times dropped from 106.0–171.0 s during the original setup to 21.0–31.7 s, assuring the facility to have more time for emergency response. However, it was noticed that FDS software did not have the estimation tool for VESDA transportation times; therefore software such as ASPIRE should be used to calculate the gas transportation times inside the detection pipelines, and then compiled with FDS results to avoid underestimation of actuation times.

关键词： electrical rooms transportation time fire dynamics dimulator vesda aspire

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