4TH INTERNATIONAL SEMINAR ON CHEMISTRY最新文献_第3页

Characteristics of Cepu Block Oil, Wonocolo Formation, East Java Indonesia: Study of aliphatic biomarkers 印尼东爪哇Wonocolo组Cepu区块油特征:脂肪族生物标志物研究

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0052284

Y. Zetra, R. Burhan, Awalia W. Firdaus, Zjahra V. Nugrahaeni, T. Gunawan

{"title":"Characteristics of Cepu Block Oil, Wonocolo Formation, East Java Indonesia: Study of aliphatic biomarkers","authors":"Y. Zetra, R. Burhan, Awalia W. Firdaus, Zjahra V. Nugrahaeni, T. Gunawan","doi":"10.1063/5.0052284","DOIUrl":"https://doi.org/10.1063/5.0052284","url":null,"abstract":"The research of organic geochemistry has been carried out through the report of aliphatic hydrocarbon fraction biomarkers in Cepu Block oil, Wonocolo Formation, East Java. Organic geochemistry studies were carried out through biomarker analysis such as the depositional environment, the origin of organic compounds, and the maturity of Cepu Block crude oil samples. The biomarker was analyzed using extraction, fractionation, and structure identification methods by Gas Chromatography-Mass Spectrometer (GC-MS). The odd-to-even carbon number predominance of n-alkanes with a CPI value of 1.04 indicates that the organic material sample had low maturity. The indicator of maturity is also supported by the Ts/Tm ratio of 0.52, and the abundance of 17α(H),21β(H)-hopane which is lower than 17β(H),21a(H)-hopane, and the high abundance of 5α(H)-7-cholestene. The ratio of pristane/phytane (Pr/Ph) of 3.25 and Ts/(Tm+Ts) ratio of 0.34 indicates that the oil sample came from an oxidative depositional environment. The bimodal distribution of n-alkane biomarkers with a ratio of long-chain to short chains n-alkanes (Σ2/Σ1) of 1.25 indicates that the source of oil organic compounds comes from higher plants, bacteria, and algae. The presence of hopane and homohopane, 8β(H)-drimane and homodrimane compounds, and also the sterane group indicates the presence of bacterial input with bacteriohopanetetrol precursors produced by Archaebacteria. The results that have been obtained indicate that the Cepu Block oil sample, Wonocolo Formation has various organic sources with low maturity.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"126 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79525061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generic QSPR study for predicting critical micelle concentration of gemini cationic surfactants using the online chemical modeling environment (OCHEM) 基于在线化学模拟环境(OCHEM)预测gemini阳离子表面活性剂临界胶束浓度的通用QSPR研究

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0051623

Ely Setiawan, K. Wijaya, M. Mudasir

{"title":"Generic QSPR study for predicting critical micelle concentration of gemini cationic surfactants using the online chemical modeling environment (OCHEM)","authors":"Ely Setiawan, K. Wijaya, M. Mudasir","doi":"10.1063/5.0051623","DOIUrl":"https://doi.org/10.1063/5.0051623","url":null,"abstract":"In this paper, a generic QSPR (quantitative structure-property relationship) model have been developed to investigate the relation between the critical micelle concentration (cmc) and the molecular structure of 231 gemini cationic surfactants with the various hydrophilic head group. The QSPR modeling were performed using the OCHEM (Online CHEmical Modeling environment), a web-based model development platform. The OCHEM platform provides several molecular descriptors calculation and machine learning methods as a tool to build QSPR models. Eight different software packages including Dragon v6, OEstate and ALogPS, CDK, ISIDA Fragment, ChemAxon, Inductive Descriptor, Mordred, and PyDescriptor are used to calculate molecular parameters of gemini cationic surfactants. Also, eight machine learning methods (MLRA, ASNN, kNN, LibSVM, FSMLR, DNN, RFR, and PLS) are used to develop QSPR models. A total of 64 QSPR models were generated with 6 top-ranked models. Based on the statistical coefficient of QSPR models, the model 5 which is constructed from combination of ASNN method and Mordred descriptors, provided the best QSPR models. The model 5 performed the highest predictive result with R2 = 0.95, q2 = 0.95, RMSE = 0.17, and MAE = 0.11. The model can be access on OCHEM website (https://ochem.eu/model/25147470) and can be used for prediction of cmc of new gemini cationic surfactants compound at the early steps of gemini cationic surfactants development.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79876602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Introducing closed form solution of Riccati differential equation of constant coefficient for solving some model of chemical processes 引入常系数Riccati微分方程的闭型解，用于求解某化学过程模型

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0054521

A. Y. Rohedi

引用次数: 0

Molten salt synthesis of photocatalyst material SrTix-1FexO3 (x= 0, 0.05, 0.1, 0.15, and 0.2) 光催化材料srfix - 1fexo3 (x= 0、0.05、0.1、0.15、0.2)的熔盐合成

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0051525

A. D. Prasetiyo, D. R. Novianti, Hasal Maulidianingtiyas, A. Prasetyo

引用次数: 0

Effects of temperature and neutralizing agent on lactic acid production by Rhizopus sp. fermentation 温度和中和剂对根霉发酵产乳酸的影响

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0051959

W. Erliana, T. Widjaja, T. Indah, D. Susilo, Annisa Dewi

{"title":"Effects of temperature and neutralizing agent on lactic acid production by Rhizopus sp. fermentation","authors":"W. Erliana, T. Widjaja, T. Indah, D. Susilo, Annisa Dewi","doi":"10.1063/5.0051959","DOIUrl":"https://doi.org/10.1063/5.0051959","url":null,"abstract":"Lactic acid is a raw material for Poly Lactic Acid (PLA) as a biodegradable polymer. One of the lignocellulosic biomass which has the potential as a feedstock to produce lactic acid is sugar palm starch waste (SPSW). This study purposes to investigate the effects of temperature and neutralizing agent on lactic acid production. SPSW has high cellulose content (40.10%) and lignin (27.24%). The presence of lignin content can inhibit the process of cellulose hydrolysis into reducing sugar. Therefore, the pretreatment process is necessary to remove lignin—the acid-organosolv pretreatment using H2SO4 0.2 M and 30% ethanol with 3% NaOH as a catalyst can reduce lignin content to 27%. Subsequently, The hydrolysis process using the cellulase enzyme from Trichoderma reseei for 24 h at 60 °C and 125 rpm. The concentration of reducing sugar (5.3144 g/L) was analyzed using the DNS method. Afterward, the aerobic fermentation process has carried out using Rhizopus oryzae and Rhizopus arrhizus with various temperatures (30, 34, 38, and 42 °C) and CaCO3 concentrations as neutralizing agents (0.6 and 0.8 (w/v)). The highest lactic acid concentration was obtained after incubation during 48 h at 30 °C; 150 rpm with CaCO3 concentration 0.8 g/L is 2.1751 g/L for Rhizopus oryzae and 2.7062 g/L for Rhizopus arrhizus.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"201 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83551108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Catalytic cracking of jatropha oil into biofuel over hierarchical zeolite supported NiMo catalyst 分级沸石负载镍离子催化剂催化裂解麻疯树油制备生物燃料

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0051737

I. Aziz, Tri Retnaningsih, Dhika Gustama, N. Saridewi, L. Adhani, Adip A. Dwiatmoko

{"title":"Catalytic cracking of jatropha oil into biofuel over hierarchical zeolite supported NiMo catalyst","authors":"I. Aziz, Tri Retnaningsih, Dhika Gustama, N. Saridewi, L. Adhani, Adip A. Dwiatmoko","doi":"10.1063/5.0051737","DOIUrl":"https://doi.org/10.1063/5.0051737","url":null,"abstract":"NiMo bimetal catalyst/hierarchical zeolite (NiMo/HZ) can be used in jatropha oil catalytic cracking into biofuel. The use of the hierarchical zeolite as a support can increase the reactant diffusion into the catalyst pores so that the reaction occurs optimally. This study aims to determine the characterization of NiMo/HZ catalysts and the biofuel selectivity produced in jatropha oil catalytic cracking. The hierarchical zeolite was synthesized from natural zeolites in Lampung using a desilication process and impregnated by varying the NiMo metal ratio (9:1, 8:2, and 7:3). The resulting catalyst was characterized using X-Ray Diffraction, Surface Area Analyzer, and Ammonia Temperature-Programmed Desorption. Catalytic cracking was performed using a stainless steel autoclave reactor at a temperature of 375°C for 2 hours.XRD results in all ratios showed the presence of Ni (2θ=52°), Mo (2θ=23°), and did not change the crystallinity of the zeolite. NiMo (9:1)/HZ catalyst had the largest acidity value of 1.9517 mmol/g and the largest surface area for NiMo (7:3)/HZ catalyst is 24.62 m2/g. Jatropha oil catalytic cracking showed the best results at NiMo (7:3)/HZ catalyst with selectivity of 36.38% gasoline, 14.44% kerosene, and 15.99% diesel.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"118 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77391657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

“SIAB” smart E-stoichiometry as a chemistry learning acid base on Android mobile “SIAB”智能电子化学计量学作为安卓手机上的化学学习酸碱

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0052241

Linaniyyatul - Masruroh, Fikri Ramadhan, Sagara Firdiantama, B. Kindhi

{"title":"“SIAB” smart E-stoichiometry as a chemistry learning acid base on Android mobile","authors":"Linaniyyatul - Masruroh, Fikri Ramadhan, Sagara Firdiantama, B. Kindhi","doi":"10.1063/5.0052241","DOIUrl":"https://doi.org/10.1063/5.0052241","url":null,"abstract":"In this millennial era, technology is growing rapidly, it is hoped that everything can be digitized in order to facilitate the access process. Likewise in the education sector, digital media is expected to facilitate the work of teachers and students’ understanding of material at school. Therefore we want to create an educational platform that contains a lesson in school, and we choose chemistry. After conducting the survey, the subject of chemistry lesson chosen by the respondents was stoichiometry. The name of this app is “SIAB”. SIAB “Stoichiometry Acid Base” is a chemical calculator application that is useful for calculating the quantitatively between reagents (reactants) and products (reaction products) in acid base reaction. There are 3 steps methodology to implement it, first step is problem survey, to find out whether the chosen problem is related to the target. Second step is analysis, to make sure that the problem relates to the target, and the target is experiencing the chosen problem. Last step is application design to build and design SIAB apps, for the application design step there are 3 part of step. The first step, we search and gather sources that contain about acid and base chemical reaction theory, which will be used as a reference material to be displayed in the application. Then the second step is the fulfillment of the required application assets including image and audio which for help user to make more interesting and understanding easily. The third step is determining the core software used to make the application. The result of the implementation test of our application is 90% of students find this application helpful to determine the results of chemical reactions between several molecules and easier to study. This mobile application can be used to simplify the calculation of acid-base stoichiometry anytime and anywhere.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84231552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Synthesis and characterization of ZnO nanoparticles using pumpkin seed extract (Cucurbita moschata) by the sol-gel method 溶胶-凝胶法制备以西瓜籽提取物为原料的ZnO纳米粒子

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0051826

N. Saridewi, Heri T. Syaputro, I. Aziz, D. Dasumiati, B. N. Kumila

{"title":"Synthesis and characterization of ZnO nanoparticles using pumpkin seed extract (Cucurbita moschata) by the sol-gel method","authors":"N. Saridewi, Heri T. Syaputro, I. Aziz, D. Dasumiati, B. N. Kumila","doi":"10.1063/5.0051826","DOIUrl":"https://doi.org/10.1063/5.0051826","url":null,"abstract":"Pumpkin (Cucurbita moschata) is one of the easiest plants to grow in Indonesia. So far, pumpkin seeds have only been thrown away and become part of organic waste. Pumpkin seed extract has a functional group that can function as a reducing agent, stabilizer, and capping agent in the synthesis of nanoparticles ZnO by the sol-gel method. This study aims to test the ability of pumpkin seed extract in synthesizing ZnO nanoparticles using the sol-gel method. This research phase begins with the pumpkin seeds being dried and made into flour. Pumpkin seed flour was extracted and reacted with Zn(CH3COO)2. 2H2O as a precursor with variations in the concentration of the precursors, i.e. 0.05; 0.1; and 0.15 M at pH 8 with the addition of 0.1 M NaOH solution. The extract of pumpkin seeds was characterized using the Fourier Transform-Infrared (FTIR) instrument. ZnO nanoparticles were characterized using X-ray Diffraction (XRD) and Transmission Electron Microscope (TEM) instruments. FTIR results from pumpkin seed extract showed that there are hydroxy and carboxyl groups which allow them to act as reducing and stabilizing agents as well as capping agents in the synthesis process of ZnO nanoparticles. XRD results showed good crystallinity for each of the ZnO nanoparticles with a hexagonal crystal system. TEM morphology results identified that the nanoparticles obtained had a spherical shape and had a relatively uniform particle size distribution with an average particle size of 28.07 nm.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88193259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Adsorption of carbon dioxide in porous carbon containing monoethanolamine (MEA): The effect of carbon surface pre-treatment 单乙醇胺(MEA)多孔碳对二氧化碳的吸附:碳表面预处理的影响

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0052535

Xena Callista, I. Prasetyo, T. Ariyanto

引用次数: 0

The antibacterial activity of vanillin derivative compounds 香兰素衍生物的抑菌活性

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0051523

R. Retnosari, I. B. Rachman, S. Sutrisno, M. E. F. Sari, D. Sukarianingsih, Y. Rukayadi

{"title":"The antibacterial activity of vanillin derivative compounds","authors":"R. Retnosari, I. B. Rachman, S. Sutrisno, M. E. F. Sari, D. Sukarianingsih, Y. Rukayadi","doi":"10.1063/5.0051523","DOIUrl":"https://doi.org/10.1063/5.0051523","url":null,"abstract":"The aim this study is to perform synthetic compound of 9-(4-hydroxy-3-methoxyphenyl)-3,3,6,6-tetramethyl- 3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione (1a) and 9-(3-ethoxy-4-hydroxyphenyl)-3,3,6,6-tetramethyl- 3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione (1b) (1,8-dioxo-hydroxanthene derivates) derivate from vanillin and to determine their antibacterial activity against various bacteria such as Staphylococcus epidermidis, Propionibacterium acnes, Staphylococcus epidermidis, Bacillus subtilis, Salmonella typhimurium, and Pseudomonas aeruginosa. Compound 1a and 1b were synthesized from dimedone and aromatic aldehyde (vanillin and ethyl vanillin) in the presence of concentrated sulfuric acid and ethanol as solvent. Their antibacterial activity was determined by well diffusion assay method with measuring zone of inhibition in mm. Two derivatives of 1,8-dioxo-octahydroxanthene (compound 1a and 1b) has been successfully synthesized. Compound 1b has very strong antibacterial activity against Staphylococcus epidermidis with inhibition zone 23,38 mm and compound 1a has medium antibacterial activity against P. acnes, S. epidermidis, B. subtilis, S. typhimurium, and P. aeruginosa. The susbtitution of the methoxy group attached to the aromatic aldehydes with an ethoxy group enhance the antibacterial activity of 1,8-dioxo-hydroxanthene compounds.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82223077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2