Jurnal Riset Kimia最新文献

Pemanfaatan Lumpur Lapindo sebagai Sumber Silika Magnetik untuk Adsorpsi Tumpahan Crude Palm Oil 利用拉平多泥作为原油棕榈油泄漏吸附的磁性二氧化硅来源

Jurnal Riset Kimia Pub Date : 2024-04-23 DOI: 10.25077/jrk.v15i1.658

Wihda Zuhara, Rahmad Nuryanto, R. A. Lusiana, Lisna Efiyanti

{"title":"Pemanfaatan Lumpur Lapindo sebagai Sumber Silika Magnetik untuk Adsorpsi Tumpahan Crude Palm Oil","authors":"Wihda Zuhara, Rahmad Nuryanto, R. A. Lusiana, Lisna Efiyanti","doi":"10.25077/jrk.v15i1.658","DOIUrl":"https://doi.org/10.25077/jrk.v15i1.658","url":null,"abstract":"In this paper, synthesis of silica magnetite adsorbent has been carried out from Lapindo Mud silica and magnetite (Fe3O4) using the template Cetyltrimethylammonium bromide (CTAB) through a microemulsion process. This research aims to determine the adsorption ability of magnetic silica material as an adsorbent for Crude Palm Oil (CPO) with varying contact times of 10, 20, 30, 60, 90 minutes and an adsorbate concentration of 0,2, 0,4, 0,6, 0,8 and 1 gram. Silica is obtained from Lapindo Mud extraction using the acid leaching method using HCl. Magnetite was prepared by mixing ferric chloride and ferrous chloride salts with an alkaline base. Synthesis of magnetic silica adsorbent using CTAB and 1-butanol as a surfactant and co-surfactant, respectively. The characterization results from FTIR and SEM-EDX data identified the presence of silanol (Si-OH) and Fe-O groups, magnetic silica adsorbent showed an irregular morphological pattern, the size tended to be heterogeneous, contained Fe, O and Si elements. The XRD results show that there are peaks in the (200), (311) and (440) planes, the GSA results show that the pore surface area is 37.048 m2/g, the total pore volume is 0.321 cm3/g and the pore diameter is 33.907 nm, which indicates that the pores have a mesoporous structure. Based on this research, the optimum contact time is 60 minutes with adsorption kinetics following the pseudo-second order and Langmuir isotherm with an adsorption capacity of 1.76 mg/g.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140670477","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

Pemanfaatan Ekstrak Daun Sirih Hijau (Piper Betle Linn.) sebagai Capping Agent dalam Green Synthesis Spinel Ferit ZnFe2O4 untuk Remediasi Fenol dalam Air dan sebagai Anti Bakteri 利用绿槟榔叶提取物（Piper Betle Linn.）

Jurnal Riset Kimia Pub Date : 2024-04-23 DOI: 10.25077/jrk.v15i1.685

Rahmayeni Rahmayeni, Putri Yuliani, Yuliati Eka Putri, Yeni Stiadi

{"title":"Pemanfaatan Ekstrak Daun Sirih Hijau (Piper Betle Linn.) sebagai Capping Agent dalam Green Synthesis Spinel Ferit ZnFe2O4 untuk Remediasi Fenol dalam Air dan sebagai Anti Bakteri","authors":"Rahmayeni Rahmayeni, Putri Yuliani, Yuliati Eka Putri, Yeni Stiadi","doi":"10.25077/jrk.v15i1.685","DOIUrl":"https://doi.org/10.25077/jrk.v15i1.685","url":null,"abstract":"The spinel ferrite material ZnFe2O4 was synthesized using a green synthesis approach by the hydrothermal method. In the synthesis, 2M NaOH was used as a mineralizer and betel leaf extract with varying volumes of 1, 3, 5, and 7 mL as a capping agent, then continued with calcination at 500, 600, and 700°C. Several devices, such as XRD, FT-IR, SEM-EDX, DRS-UV-Vis, and VSM, were used to characterize the synthesized ZnFe2O4 material. The pattern of XRD indicated that the ZnFe2O4 material has a cubic structure, where the increase in crystal size was after calcination. The Fourier Transform Infra-Red (FT-IR) spectrum shows the Fe-O interaction at wave numbers 427-417 cm-1, which is located on the octahedral side, while the Zn-O interaction at wave numbers 534-510 cm-1, which is located on the tetrahedral side in spinel ferrite structure. From the DRS UV-Vis spectrum pattern and band gap values, it was found that the material absorbs light in the visible region. Scanning Electron Microscope (SEM) images show that the morphology of the synthesized material is circular. The Vibrating Sample Magnetometer (VSM) hysteresis curve shows that the synthesized ZnFe2O4 has paramagnetic properties. The synthesized ZnFe2O4 material has photocatalytic activity towards phenolic compounds with a degradation percentage reaching 62.2%, and this material is active as an antibacterial with an inhibition area of 14.4 for S. aereus bacteria.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140666204","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

Karakterisasi Struktur Kumarin pada Akar Tumbuhan Langsat (Lansium domesticum Corr.) 兰萨特植物根（Lansium domesticum Corr.）

Jurnal Riset Kimia Pub Date : 2024-04-23 DOI: 10.25077/jrk.v15i1.610

Riska Nurapita, Rudiyansyah, Harlia

引用次数: 0

Polypeptide Antibiotic Produced by a Thermo-Halophilic Bacterium from Pria Laot Sabang 76 Isolate 来自 Pria Laot Sabang 76 分离物的嗜热嗜热细菌产生的多肽抗生素

Jurnal Riset Kimia Pub Date : 2024-04-23 DOI: 10.25077/jrk.v15i1.634

Febriani Febriani, M. A. Suzanni, Ellenia Rakashiwi, Nurdin, T. Iqbalsyah

{"title":"Polypeptide Antibiotic Produced by a Thermo-Halophilic Bacterium from Pria Laot Sabang 76 Isolate","authors":"Febriani Febriani, M. A. Suzanni, Ellenia Rakashiwi, Nurdin, T. Iqbalsyah","doi":"10.25077/jrk.v15i1.634","DOIUrl":"https://doi.org/10.25077/jrk.v15i1.634","url":null,"abstract":"Extremophiles are known to produce antibiotics. This study aimed to isolate and purify polypeptide antibiotics from Pria Laot Sabang (PLS) 76, a bacterium isolated from an undersea fumarole. The antibiotic production was done by cultivating PLS 76 in a 2.5% TSB liquid medium and incubated at 70°C, 150 rpm for 112 hours. Ninhydrin assay on the crude supernatant after centrifugation indicated that the PLS 76 produced a polypeptide antibiotic. The supernatant was partitioned using methanol. The antibiotic activity was tested using the Kirby-Bauer method, and the inhibition zone was about 12 mm against Escherichia coli and Staphylococcus aureus. The methanol fraction was purified further by Preparative Thin Layer Chromatography and produced several fractions. Fractions with the same Rf were pooled and subjected to the ninhydrin assay. Fraction A, which gave a positive result after the ninhydrin assay, showed an inhibition zone of only 7 mm against E. coli and S. aureus. The Quadrupole Time-of-Flight (QTOF) Mass Spectrometry data indicated that the antibiotic's structure was similar to Polymyxin B2, an antibiotic of a polypeptide group.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140670997","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

A New Insight Into Toxicity of Database Compounds from Ginger (Zingiber officinale) by Modelling Study 通过建模研究对生姜数据库化合物毒性的新认识

Jurnal Riset Kimia Pub Date : 2024-04-23 DOI: 10.25077/jrk.v15i1.638

N. Frimayanti, Mira Febrina, Annisa Yuri Amalia

{"title":"A New Insight Into Toxicity of Database Compounds from Ginger (Zingiber officinale) by Modelling Study","authors":"N. Frimayanti, Mira Febrina, Annisa Yuri Amalia","doi":"10.25077/jrk.v15i1.638","DOIUrl":"https://doi.org/10.25077/jrk.v15i1.638","url":null,"abstract":"Dengue haemorrhagic fever (DHF) is an infectious disease caused by the dengue virus. The dengue virus is transmitted through female mosquitoes, especially Aedes aegypti and Aedes albopictus. Indonesia is a dengue endemic country, and almost all provinces in Indonesia are infected with dengue. However, targeted antiviral drugs against dengue virus (DENV) are not yet available. This study aimed to determine the potential of three compounds isolated from ginger (Zingiber officinale) as dengue NS2B/NS3 inhibitors, and to predict the physicochemical properties (drug-likeness) and potential toxicity of drug candidates. Ginger isolates in the form of [8]-gingerol, [6]-paradol, shogaol were obtained from the Natural Discovery Database (NADI). Toxicity and drug-likeness predictions were performed using ProTox-II and SwissADME, and Molecular Operating Environment (MOE) 2022.0901 was used for the molecular docking process. Results: The results showed that the ginger compound (Zingiber officinale), [8]-Gingerol, [6]-Paradol, and Shogaol, had binding free energy of -7.18, -7.10 and -6.88 kcal/mol, respectively. It is indicated that three compounds had potentiality to inhibit the NS2B/NS3 protein complex with a binding free energy that was almost equivalent to that of the positive control, panduratin A, and similar to that of the positive control, which can be seen in superimposition. In addition, three compounds isolated from ginger met the drug-likeness parameters. Based on the analysis of in silico toxicity studies, the three compounds isolated from ginger showed different levels of toxicity. Therefore, based on the safety level of oral use, the [8]-gingerol compound is safer to develop as a dengue antiviral drug, where the LD50 value of [8]-gingerol is 2.580 mg/kg with a class V toxicity level that is practically nontoxic.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140671764","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

Senyawa Isoflavonoid dari Akar Gitaan (Willughbeia coriacea Wall.) 来自吉它根（Willughbeia coriacea Wall.）的异黄酮类化合物

Jurnal Riset Kimia Pub Date : 2024-04-23 DOI: 10.25077/jrk.v15i1.686

Jamarlia Aprenesya, Puji Ardiningsih., dan Rudiyansyah

引用次数: 0

Minyak Atsiri Serai Wangi (Cymbopogon nardus L. Rendle): Diisolasi dengan Dua Metode Berbeda, Kualitas dan Aktivitas Antibakterinya 香茅精油（Cymbopogon nardus L. Rendle）：用两种不同方法分离出的香茅精油及其质量和抗菌活性

Jurnal Riset Kimia Pub Date : 2024-04-23 DOI: 10.25077/jrk.v15i1.653

Afrizal, Anggun Defitriani, Mai Efdi

引用次数: 0

Efektifitas Reaksi Transesterifikasi Minyak Kelapa dan Sereh untuk Pembuatan Perisa Alami dengan Biokatalisator Lipase serta Penggunaan Ultrasonik 利用脂肪酶生物催化剂和超声波进行椰子油和香茅油酯交换反应制备天然香精的有效性

Jurnal Riset Kimia Pub Date : 2024-04-23 DOI: 10.25077/jrk.v15i1.641

Dwina Moentamaria, N. Rizki, Rosita Dwi Chrisnandari, Zakijah Irfin, Dyah Ratna Wulan

{"title":"Efektifitas Reaksi Transesterifikasi Minyak Kelapa dan Sereh untuk Pembuatan Perisa Alami dengan Biokatalisator Lipase serta Penggunaan Ultrasonik","authors":"Dwina Moentamaria, N. Rizki, Rosita Dwi Chrisnandari, Zakijah Irfin, Dyah Ratna Wulan","doi":"10.25077/jrk.v15i1.641","DOIUrl":"https://doi.org/10.25077/jrk.v15i1.641","url":null,"abstract":"In general, flavor are synthesis through enzymatic hydrolysis and esterification reactions (up to 20 hours) using commercial ingredients based on free fatty acids and alcohol. Efficient endeavors utilizing enzymatic transesterification to expedite reactions are necessary to acquire flavored products. Substrates may originate from commercial or natural sources abundant in fatty acids and alcohol. Commercial fatty acids and alcohol (geraniol) are readily available in pure forms. Alternatively, fatty acids can be sourced from coconut oil, while geraniol can be derived from lemongrass oil, which is more cost-effective compared to commercial ingredients. Ultrasonics have emerged as a means to expedite enzymatic. The objective of this study is to investigate the impact of ultrasonic power and transesterification reaction time between coconut oil and geraniol on geraniol conversion. Utilizing lipase (415.99 U/g), coconut oil was subjected to transesterification with commercially obtained pure geraniol in a 1:3 weight ratio, conducted in an ultrasonic tank filled with water. Reaction durations spanned 30, 60, 90, 120, and 150 minutes, with ultrasonic powers set at 50, 70, and 90 watts. The study findings elucidated that the highest geraniol conversion rate of 50.59% was achieved with 70 watts of ultrasonic power over a 90-minute period. These optimal conditions were subsequently applied to transesterify coconut oil with geraniol from lemongrass oil, yielding a conversion rate of 90.29%. This finding demonsttrate the posibility of employing coconut oil and lemongrass oil in a one-stage transesterification process to produce natural flavors via enzymatic lipase catalysis expedited by ultrasonic technology, facilitating swift reaction times.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140669973","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

The Density Functional Tight Binding (DFTB) Approach for Investigating Vacancy and Doping in Graphene as Hydrogen Storage 密度泛函紧密结合 (DFTB) 法研究石墨烯中的空位和掺杂储氢

Jurnal Riset Kimia Pub Date : 2024-04-23 DOI: 10.25077/jrk.v15i1.635

Y. Hidayat, Fitria Rahmawati, Khoirina Dwi Nugrahaningtyas, Paulus Bagus Swandito

引用次数: 0

Cytotoxic Potential of Compounds Isolated from Non-Polar Fractions of Sungkai Plant Leaves (Peronema canescens Jack) Against Artemia salina Leach Larvae 从宋开植物叶（Peronema canescens Jack）非极性馏分中分离出的化合物对鲑鳟幼虫的细胞毒性潜力

Jurnal Riset Kimia Pub Date : 2024-04-23 DOI: 10.25077/jrk.v15i1.655

Suryati, Irfan Afrinal, Afrizal, Rahmi Vika, Ulia

{"title":"Cytotoxic Potential of Compounds Isolated from Non-Polar Fractions of Sungkai Plant Leaves (Peronema canescens Jack) Against Artemia salina Leach Larvae","authors":"Suryati, Irfan Afrinal, Afrizal, Rahmi Vika, Ulia","doi":"10.25077/jrk.v15i1.655","DOIUrl":"https://doi.org/10.25077/jrk.v15i1.655","url":null,"abstract":"The sungkai plant (Peronema canescens Jack), belonging to the Lamiaceae family, is a plant that is traditionally used as medicine, including toothache, malaria, and fever medicine. In this research, isolation was carried out with vacuum liquid chromatography (VLC), solid and liquid fractions were obtained. The solid fraction was further separated using column chromatography to obtain the isolated compound as a white solid (amorphous) weighing 10 mg (melting point 140˚C-142˚C). The results of the UV spectrum data show that there are no conjugated double bonds. The results of the IR spectrum show the presence of C-H groups at wave numbers 2921,49 cm-1 and 2856,94 cm-1, C=O groups at wave numbers, C=C groups at wave numbers 1641,51 cm-1, and dimethyl germinal which is characteristic of triterpenoid compounds at wave numbers 1456.68 cm-1 and 1372.41 cm-1. Meanwhile, the isolated oil was analyzed for chemical components using GC-MS. It was discovered that there were 83 chemical compound components contained therein with 4 main compound components, namely pentadecanoic acid (16.65%), 9,12-octadecanoic acid (16.12%), propyl palmitate (7.89%), and hexadecenoic acid, methyl ester (5.59%). A cytotoxic test was carried out on both fractions using the Brine Shrimp Lethality Test (BSLT) method. The results showed that the isolated compound was non-toxic with an LC50 value of 190214.2807 mg/L and the isolated oil was very toxic with an LC50 value of 34.2452 mg/L.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140669047","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