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Acid neutralization of small-scale gold processing wastewater in Pancurrendang village, Banyumas Regency using natural ingredients

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AIP Conference Proceedings 2023年第1期2598卷

作者： Eni Muryani Sajidan M. Th. Sri Budiastuti Pranoto Doctoral Program of Environmental Science Graduate School of Universitas Sebelas Maret Surakarta Indonesia Environmental Engineering Universitas Pembangunan Nasional Veteran Yoyakarta Jl. Padjajaran (SWK 104) North Ringroad Condongcatur Yogyakarta Indonesia Graduate School of Universitas Sebelas Maret Surakarta Indonesia

The acidity of the amalgamation liquid effluent from small-scale gold processing in Pancurendang Village has been detected. Coconut coir and banana stem midribs are part of plants that contain potassium and sodium, as natural ingredients of alkali source and increase the potential hydrogen (pH). The aims of the research are: 1) determine the characteristic of wastewater from the amalgamation gold processing in Pancurendang Village, 2) analyze the effectiveness of the use of chopped coconut coir from Cocos nucifera and banana stem midrib from Musa sp. to neutralize the acidity of wastewater gold processing from Pancurendang Village, and 3) detect the potential of coconut coir and banana stem midrib to adsorb mercury (Hg). The wastewater from the three gold processing plants was mixed. Parameters tested in the laboratory include pH, TSS, Cu, Cd, Zn, Pb, As, Ni, Cr, CN, and Hg. Results were compared with quality standards. Acid neutralization trials used chopped coconut coir (coco-chips) and banana stem midribs with a dose variation of 50, 100, and 250 grams per 1 liter of wastewater. In addition, a mixture of 50 g of coco-chips and 50 g of banana stem midribs are also used. The pH of the wastewater was measured daily. The laboratory analysis results showed that the pH, TSS, and Hg values did not match the quality standards set by the Minister of Environment Decree No. 202/2004 and Central Java Regional Regulation No. 5/2012. Treatment with 250 grams of banana stem midrib in 1 L of wastewater can increase the pH of amalgamation wastewater from 2.8 to 6 within four days and 6.6 within eight days. Banana stem midrib is more effective in neutralizing acid in gold processing wastewater than coconut coir.

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Isolation of 24-homoscalarane sesterterpenoids from a sponge of the genus Lendenfeldia

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Phytochemistry Letters 2024年 61卷 177-181页

作者： Zheng, Li-Guo Chen, You-Yan Liaw, Chia-Ching Lin, Yu-Chi Chien, Su-Ying Lo, Yi-Hao Tsai, Yu-Chi Hu, Hao-Chun Chen, You-Ying Hwang, Tsong-Long Ou, Tzu-Ming Sung, Ping-Jyun Doctoral Degree Program in Marine Biotechnology National Sun Yat-sen University Kaohsiung 804201 Taiwan National Museum of Marine Biology and Aquarium Pingtung 944401 Taiwan School of Traditional Chinese Medicine College of Medicine Chang Gung University Taoyuan 333323 Taiwan Division of Chinese Materia Medica Development National Research Institute of Chinese Medicine Ministry of Health and Welfare Taipei 112304 Taiwan Department of Biochemical Science and Technology National Chiayi University Chiayi 600355 Taiwan Instrumentation Center National Taiwan University Taipei 106319 Taiwan Department of Family Medicine Zuoying Armed Forces General Hospital Kaohsiung 813204 Taiwan Shu-Zen Junior College of Medicine and Management Kaohsiung 821004 Taiwan Institute of Medical Science and Technology National Sun Yat-sen University Kaohsiung 804201 Taiwan School of Chinese Medicine College of Chinese Medicine China Medical University Taichung 404333 Taiwan Graduate Institute of Natural Products College of Medicine Chang Gung University Taoyuan 333323 Taiwan Research Center for Chinese Herbal Medicine College of Human Ecology Chang Gung University of Science and Technology Taoyuan 333324 Taiwan Graduate Institute of Health Industry Technology College of Human Ecology Chang Gung University of Science and Technology Taoyuan 333324 Taiwan Department of Anesthesiology Chang Gung Memorial Hospital Taoyuan 333423 Taiwan Department of Chemical Engineering Ming Chi University of Technology New Taipei City 243303 Taiwan Division of Gastroenterology Department of Internal Medicine Kaohsiung Armed Forces General Hospital Kaohsiung 802301 Taiwan Department of Marine Biotechnology and Resources National Sun Yat-sen University Kaohsiung 804201 Taiwan Chinese Medicine Research and Development Center China Medical University Hospital Taichung 404394 Taiwan Graduate Institute of Natural Products Kaohsiung Medical University Kaohsiung 807378 Taiwan Program in Ph

The chemical screening of an algae-containing marine sponge identified as Lendenfeldia species has isolated two 24-homoscalarane sesterterpenoids, including a known compound, felixin A (1) and a new analogue, lendenfeldarane V (2). The structure of 1, obtained in a previous study, was cited for the first time in this study via single-crystal X-ray diffraction analysis. The structure of 2 was ascertained via 2D NMR experiments and a literature review. The absolute configurations of 1 and 2 were delineated with DP4+ computation and specific optical rotation. Homoscalarane 1 exhibited cytotoxicity towards MG63 human osteosarcoma cells. © 2024 Phytochemical Society of Europe

关键词： Felixin Homoscalarane Lendenfeldarane Lendenfeldia MG63

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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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Systems thinking on renewable energy: A bibliometric analysis

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AIP Conference Proceedings 2023年第1期2734卷

作者： Dindin Nasrudin Agus Setiawan Dadi Rusdiana Liliasari Science Education Doctoral Program Universitas Pendidikan Indonesia Bandung Indonesia Physics Education Study Program UIN Sunan Gunung Djati Bandung Indonesia Department of Mechanical Engineering Education Universitas Pendidikan Indonesia Bandung Indonesia Department of Physics Education Universitas Pendidikan Indonesia Bandung Indonesia Department of Chemistry Education Universitas Pendidikan Indonesia Bandung Indonesia

Energy is a systematic problem involving many fields and disciplines. Discourse about it requires systems thinking. This research aims to reveal trends and future work related to system thinking on renewable energy. The method used is a bibliometric analysis of the Scopus database using VOSviewer software. Through the selection process, 284 documents deemed relevant were selected from journal articles and conference proceedings. Through VOSviewer analysis, 4 clusters of related keyword groups are shown. Four very influential words in this research theme are systems theory with 224 occurrences, renewable energy resources with 142 occurrences, renewable energy with 112 occurrences, and system dynamics with 102 occurrences. Through network visualization, the relationship between concepts both within one cluster and between clusters is shown. The visualization overlays is used as a basis of mapping the future work related to system thinking on renewable energy which include renewable energy resources, system theory, system dynamics, alternative energy, sustainable development, decision making, and renewable energy technology. This study concludes that bibliometric analysis through VOSviewer is proven to be able to show trends and future work for systems thinking on renewable energy research.

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Modelling and reducing fuel flow pulsation of a fuel-metering system during pump mode switching in a turbofan engine

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IOP Conference Series: Earth and Environmental science 2019年第5期240卷

作者： S Masuda F Shimizu M Fuchiwaki K Tanaka Control Systems Engineering Department Research & Engineering Division Aero Engines Space & Defense Business Area IHI Corporation 229 Tonogaya Mizuho-machi Nishitama-gun Tokyo 190-1297 Japan Department of Computer Science and Systems Engineering Doctoral Program Graduate School of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 kawazu Iizuka-shi Fukuoka 820-8502 Japan Department of Mechanical Information Science and Technology School of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 kawazu Iizuka-shi Fukuoka 820-8502 Japan

In this research, the transient characteristics of a new type fuel metering system for aircraft turbofan engines using two types of pumps, a gear pump and a centrifugal pump, were studied by modelling and simulation. This new fuel metering system is capable of hydraulically unloading the operating state of each pump by the pump mode switching mechanism within the permissible range of the pump rotation speed and the fuel flow rate and it is possible to reduce the fuel temperature rise due to the pressure loss in the circuit in the operation region of the entire fuel system. In addition to this, by using a small centrifugal pump that can realize high discharge flow rate, it is possible to reduce weight compared to the conventional fuel system. However, when the pump mode is switched, unexpected fluctuation in the fuel flow rate can occur when a large change in the inlet pressure of the system occurs, the pressure control unit cannot follow the change, and the transient phenomenon cannot be suppressed. At this time, the pressure waveform generated at the time of changing the pump mode includes a high frequency component such that the pressure control unit, which plays a role of keeping the metering valve differential pressure constant, cannot follow up. Therefore, in this paper, we focused on the frequency of the pressure change waveform when the pump mode was changed and studied the model of the fuel system inlet pressure in the gear pump mode. Based on that model, we propose a method to reduce the frequency characteristics of the pressure change occurring at the time of pump mode change.

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Dynamic Soil-Structure Interaction Using ITM-FEM Approach

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Journal of Physics: Conference Series 2018年第1期1028卷

作者： Hidajat Lesmana Roesdiman Soegiarso Josia Irwan Rastandi Cholil Hasyim Muhammad Ikhsan Setiawan Nuning Kurniasih Ansari Saleh Ahmar Department of Civil Engineering Doctoral Program Tarumanagara University Jakarta 11440 Indonesia Department of Management Darul Ulum University Jombang Jawa Timur 61419 Indonesia Department of Civil Engineering Narotama University Surabaya Jawa Timur 60117 Indonesia Faculty of Communication Science Library & Information Science Universitas Padjadjaran Bandung Jawa Barat 45363 Indonesia Department of Statistics Universitas Negeri Makassar Indonesia

The effect of dynamic soil-structure interaction is really important to be examined. Moreover if the structure is nuclear power structure or multi-storey structure. In solving the dynamic problem caused by dynamic mass on the soil-structure and interaction, it will use wavelet transform. This study aims to examine the dynamic soil-structure interaction using ITM-FEM approach. In this study, soil is considered as a semi-infinite media in z-direction with unbounded domain in x-direction. The characteristic of material is considered as an isotropic, homogenous, and linear elastic material, and the material damping seems not dependent on the frequency. The dynamic soil-structure interaction using ITM-FEM approach is conducted by counting dynamic stiffness matrix { D^FE }, space truss, hexahedron solid coupling element between FEM and ITM.

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Implementation of Fuzzy-based Model for Prediction of Prostate Cancer

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Journal of Physics: Conference Series 2021年第1期1751卷

作者： Rusliyawati Kurnia Muludi Admi Syarif Agus Wantoro Doctoral Program of Mathematics and Science Faculty Lampung University Jl. Sumantri Brojonegoro No 1 Bandar Lampung Indonesia. Faculty of Engineering and Computer Science Universitas Teknokrat Indonesia J. ZA. Pagaralam No. 9-11 Bandar Lampung Indonesia. Department of Computer Science Faculty of Mathematics and Science University of Lampung Jl. Sumantri Brojonegoro No 1 Bandar Lampung Indonesia

Cancer is one of the leading causes of death worldwide. One type of cancer that causes death in the male population is prostate cancer. This disease occurs only in men because in women they do not have a prostate appearance. The aim of this study was to compare the accuracy of the model with the predictions of prostate cancer specialists. Prediction is made based on prostate specific antigen data, age, and patient prostate volume. The independent variables in this study were prostate specific antigen, age, and prostate volume. The dependent variable is the risk of prostate cancer using a fuzzy model. The novelty of this study is that the model has a low, moderate, high, and very high prostate cancer risk level output. In the previous article only PCR values were produced. The results show that the proposed fuzzy model provides a PCR value that is within the PCR interval predicted by a specialist doctor can be used properly to help diagnose and analyze the possibility of prostate cancer and is one of the considerations for doctors to decide whether or not a biopsy is needed for these patients.

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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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Integration of Local Traditions Bugis-Makassarese: Learning Strategies to Improve Mathematical Communication Skills

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Journal of Physics: Conference Series 2021年第1期1808卷

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

Communication skill is of local Bugis-Makasar one of skill needed in mathematical learning in order that the students can solve the problem in social life particularly economic mathematic. Integration of local tradition sipakatau, sipakainge and sipakalebbi consists of philosophy which can increase students' communication skill. The purpose of this study is to find out the improvement of students' communication skill of STKIP Muhammadiyah Bone in using learning strategy of 3S. Design of this study was experimental research Quasi Experimental Design using Nonequivalent Control Group Design. Based on the results of this study can be concluded that the earning strategy of 3S is effective in improving student's communication skill in economic mathematics in STKIP Muhammadiyah Bone not only on students' cognitive side but also affective and psychomotor side.

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Deceleration performance and stopping distance of hybrid composite brake lining pads of basalt and clam shell

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AIP Conference Proceedings 2023年第1期2568卷

作者： I. Ketut Adi Atmika I. Gusti Agung Kade Suriadi I. Nyoman Sutantra I. Dewa Gede Ary Subagia 1)Mechanical Engineering Department of Udayana University Street of Bukit Jimbaran Bali 80361 Indonesia 3)Technology and Material Research Center of Udayana University Street of Bukit Jimbaran Bali 80361 Indonesia 4)Doctoral Program of Engineering Science Engineering Faculty of Udayana University Street of PB Sudirman Bali 80114 Indonesia 2)Mechanical Engineering Department of Institut of Sepuluh Nopember Surabaya 60111 Indonesia

Brake lining is one of the components of the braking system on a vehicle that plays an important role for the safety of the driver. Recently, the development of brake lining materials has attracted the attention of many researchers. At first many brake pads were made of asbestos as the main material, but this brake lining material has begun to be abandoned because it has a negative impact on health and the environment. This paper presents the results of research on the development of a hybrid composite as a brake lining material. This hybrid composite is composed of the main ingredients of basalt and green clam shell waste, as well as a small amount of alumina with phenolic resin as a binder. Hybrid composite brake lining material is made through a sintering process with an emphasis of 2 tons for 30 minutes at a constant temperature of 150°C. Hybrid composite brake pads made 3 variations of weight fraction were tested on a motorcycle to see the performance of deceleration and braking distance. Also tested brake lining with asbestos material as a comparison. The lowest deceleration performance was asbestos brake lining at 6.79 m/s2, while the highest deceleration was HC4 brake lining (35% basalt-15% clam shell) of 11.51 m/s2. While the shortest braking distance is HC4 brake pads (35% basalt-15% shell) of 3.02 meters, while the longest braking distance of asbestos is 15.18 meters. The increase in the percentage of basalt content and the decrease in the percentage of clam shell content indicate a tendency to increase the magnitude of deceleration, and a tendency to decrease the braking distance for each vehicle's initial speed.

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