4TH INTERNATIONAL SEMINAR ON CHEMISTRY最新文献_第6页

Terpenoid from Indonesian temu mangga (Curcuma mangga, Val) rhizomes and review of its anticancer towards MCF-7 breast cells 印尼姜黄(Curcuma mangga, Val)根茎中萜类化合物及其对MCF-7乳腺细胞的抗癌研究进展

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0051538

Alicia N. A. Ganur, D. U. C. Rahayu, H. Dianhar, I. Irwanto, P. Sugita

引用次数: 0

Sonication-assisted green synthesis of silver nanoparticles using Piper retrofractum fruit extract and their antimicrobial assay 声纳法合成纳米银及其抑菌实验研究

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0051539

Suci Amaliyah, M. Masruri, A. Sabarudin, S. Sumitro

{"title":"Sonication-assisted green synthesis of silver nanoparticles using Piper retrofractum fruit extract and their antimicrobial assay","authors":"Suci Amaliyah, M. Masruri, A. Sabarudin, S. Sumitro","doi":"10.1063/5.0051539","DOIUrl":"https://doi.org/10.1063/5.0051539","url":null,"abstract":"In this study, silver nanoparticles (AgNPs) were synthesized using aqueous extract of Piper retrofractum fruits by the sonication-assisted an eco-friendly method. The compounds of Piper retrofractum extract can perform as reducing as well as capping agent in the synthesis process of AgNPs. Silver nitrate was used as a starting material and was reacted with Piper retrofractum extracts. The formation of AgNPs was monitored by a color change from colorless to dark brown. The synthesized AgNPs were characterized using UV-Visible, FTIR, XRD, and FESEM-EDS analysis. Surface plasmon resonance peak of silver nanoparticles analyzed using a UV-Vis spectrophotometer was observed at 476 nm. FTIR spectrum of silver nanoparticles peaks at 3420 cm−1, 2922 cm−1, 1632 cm−1, and 1021 cm−1 was similar to the Piper retrofractum extract spectrum, which indicated the compounds might involve in stabilizing nanoparticles, whereas the additional new peaks at 702 cm−1 and 535 cm−1 revealed the characteristic band of Ag-O-H. The X-ray diffractogram showed the crystalline properties of silver nanoparticles, and the average crystallite size was found around 24.86 nm. The spherical shape of morphology silver nanoparticles was observed in the SEM photograph. EDS spectrum showed the high presence of silver. Synthesized silver nanoparticles exhibited antimicrobial activity against E.coli and S.aureus. This study reported the successful green synthesis of AgNPs implementing of plant extract.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81634398","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

Computational study of methylene blue on nickel doped ZnO cluster 亚甲基蓝对镍掺杂ZnO簇的计算研究

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0051752

N. I. Oktavianti, G. R. Anindika, A. L. Ivansyah, H. Juwono, Y. Kusumawati

引用次数: 1

Physicochemical properties of microcrystalline cellulose doped imidazole membrane for direct methanol fuel cell 直接甲醇燃料电池用微晶纤维素掺杂咪唑膜的理化性质

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0051533

A. Priyangga, A. Pambudi, L. Atmaja, J. Jaafar

{"title":"Physicochemical properties of microcrystalline cellulose doped imidazole membrane for direct methanol fuel cell","authors":"A. Priyangga, A. Pambudi, L. Atmaja, J. Jaafar","doi":"10.1063/5.0051533","DOIUrl":"https://doi.org/10.1063/5.0051533","url":null,"abstract":"Energy consumption is estimated to increase until 2040 mainly in fossil fuels usage as energy source. Fossil fuels give negative impacts in human’s health and environment due to air pollution as the result of combustion. Fuel cell is the one of many alternatives to produce cleaner energy. Nafion is the membrane based perflourosulfonic acid which is still used as commercial electrolyte membrane for fuel cell. There are several drawbacks that belongs to the nafion membrane such as high methanol permeability and methanol uptake. The application of biomaterial microcrystalline cellulose (MC) and the addition of imidazole (Im) are expected to diminish methanol permeability and increasing the water uptake of the membrane. In this research, some composite of MC membrane’s performances will be determined The composite membrane of MC/Im was fabricated via phase inversion method using 5 wt.% H2SO4 coagulation bath then some other composite membranes was immersed in 2 wt.% phosphotungstic acid (PTA) solution. The lowest methanol permeability and methanol uptake is obtained by MC/Im membrane with 4,67×10−7 cm2.s−1 and 3.19%, respectively. The water uptake of MC/Im achieves 45.52% which is higher than MC, MC/PTA, and MC/Im/PTA at 35.94%, 41.75%, and 45.40%, respectively. Based on the MC/Im properties, the MC/Im membrane is a promising composite membrane for DMFC.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"1991 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88192608","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

Para-carboxyphenyl diazonium - modified carbon paste electrode for analysis Cu (II) in water 对羧基苯基重氮改性碳糊电极分析水中Cu (II)

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0052020

Pratiwi Yuliandari, R. Wibowo, D. A. Nurani

引用次数: 2

Development of interpenetrated polymer networks from bacterial cellulose film 细菌纤维素膜互穿聚合物网络的研制

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0051529

N. Masruchin, A. Nuryawan, Adelia H. Diastirini, F. Akbar, W. B. Kusumaningrum

{"title":"Development of interpenetrated polymer networks from bacterial cellulose film","authors":"N. Masruchin, A. Nuryawan, Adelia H. Diastirini, F. Akbar, W. B. Kusumaningrum","doi":"10.1063/5.0051529","DOIUrl":"https://doi.org/10.1063/5.0051529","url":null,"abstract":"This study was aimed to obtain strong and lightweight material from pristine nanocellulose of bacterial cellulose (BC) which produced from Acetobacter xylinum bacterium. The nanocellulose hydrogel resulted from inter- and intrafibrillar hydrogen bonding cellulose was used as the first network. While the second network was formed by immersion of vacuum and oven dried of BC in a mixture of citric acid and glycerol in 1 to 1 molar ratio for 2, 4, 6 and 24 h followed by crosslinking initiation by heating at 130 °C for 15 h. The composite film was characterized for mechanical testing, infrared spectroscopy and microscopy analysis. The result showed that vacuum dried BC film obtained high strength compared to oven dried BC film which suggested that slow water evaporation minimize fibrils hornification and effectively facilitated the penetration of glycerol and citric acid. Infra-red spectra showed that ester linked was formed which corresponded to the formation of interpenetrated polymer network while maintaining the transparent film. Since, all materials are edible, this quite low mechanical strength composite could be applied for rigid food edible packaging material such as hard capsule.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82781696","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

Synthesis and characterization of Cr-Co/γ-alumina catalyst for ethanol dehydration Cr-Co/γ-氧化铝乙醇脱水催化剂的合成与表征

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-06-24 DOI: 10.1063/5.0052730

I. Muna, F. Kurniawansyah, M. Mahfud, A. Roesyadi

{"title":"Synthesis and characterization of Cr-Co/γ-alumina catalyst for ethanol dehydration","authors":"I. Muna, F. Kurniawansyah, M. Mahfud, A. Roesyadi","doi":"10.1063/5.0052730","DOIUrl":"https://doi.org/10.1063/5.0052730","url":null,"abstract":"Primary alcohol dehydration reaction catalysis by using γ-Al2O3 catalyst can produce ether compounds and alkenes. The combination chrome-cobalt and alumina catalyst could convert ethanol to diethyl ether in the ethanol dehydration process. The purpose of this study was to determine the performance of Cr-Co with the support of γ-Al2O3 catalyst for ethanol dehydration to diethyl ether. Cr-Co/γ-Al2O3 catalyst was prepared using incipient wetness impregnation. γ-Al2O3 catalyst was impregnated with chrome and cobalt metals at various metal loading 5 and 10% and impregnated ratio of Cr-Co (1:1; 1:2; and 2:1). The samples were calcined at 550°C for 3 hours in nitrogen and then reduced continuously by hydrogen at 600°C for 5 hours. Then catalyst was analyzed for characterization using BET, XRD, and SEM-EDX. Treatment of γ-Al2O3 in various ratio of chrome and cobalt impregnation decreased the total surface area. Increasing metal loading in Cr-Co impregnation on γ-Al2O3 decreased total surface area and increased average pore diameter. Impregnation process lowered the crystallinity but still maintained the material crystal structure. The reduced surface area of the catalyst does not mean the effectiveness of the catalyst is reduced, but the metal will actually increase the active site of the catalyst and will affect the rate of reaction in the catalyst.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89439389","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: 3

Determination of several heavy metals in staple foods from traditional markets in Jakarta using neutron activation analysis 用中子活化分析法测定雅加达传统市场主食中几种重金属

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-01-01 DOI: 10.1063/5.0053376

S. Kurniawati, E. Damastuti, N. Adventini, W. Syahfitri, I. Kusmartini, D. D. Lestiani, M. Santoso

引用次数: 1

Photos: The 4th International Seminar on Chemistry 图片:第四届国际化学研讨会

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-01-01 DOI: 10.1063/12.0005172

引用次数: 0

Synthesis of zinc oxide (ZnO) nanoparticles by polyol method and its application on photocatalytic reduction of paracetamol concentration 多元醇法制备氧化锌纳米颗粒及其在光催化还原扑热息痛浓度中的应用

4TH INTERNATIONAL SEMINAR ON CHEMISTRY Pub Date : 2021-01-01 DOI: 10.1063/5.0051714

Anisun Zakiyah, G. R. Anindika, Y. Kusumawati

引用次数: 3