Jurnal Riset Kimia最新文献_第7页

The Effect Of Sulphur (S) Doping and K+ Adsorption To The Electronic Properties Of Graphene: A Study By DFTB Method 硫(S)掺杂和K+吸附对石墨烯电子性能的影响:DFTB方法研究

Jurnal Riset Kimia Pub Date : 2022-09-30 DOI: 10.25077/jrk.v13i2.485

Y. Hidayat, F. Rahmawati, E. Heraldy, K. Nugrahaningtyas, I. Nurcahyo

引用次数: 0

Pemanfaatan Ekstrak Biji Feun Kase (Thevetia peruviana) sebagai Inhibitor Korosi Logam Seng dalam Media HCl Feun Kase籽的利润剂(Thevetia peruviana)是HCl中锌金属腐蚀的抑制剂

Jurnal Riset Kimia Pub Date : 2022-09-30 DOI: 10.25077/jrk.v13i2.520

Matius Stefanus Batu, M. M. Kolo, Adolvina Kono

{"title":"Pemanfaatan Ekstrak Biji Feun Kase (Thevetia peruviana) sebagai Inhibitor Korosi Logam Seng dalam Media HCl","authors":"Matius Stefanus Batu, M. M. Kolo, Adolvina Kono","doi":"10.25077/jrk.v13i2.520","DOIUrl":"https://doi.org/10.25077/jrk.v13i2.520","url":null,"abstract":"Feun Kase seed extract can be used as a corrosion inhibitor on zinc metal in HCl solution. This study aims to determine the secondary metabolites contained in Feun Kase seed extract, inhibition efficiency and corrosion rate, and surface morphology of zinc metal in the inhibition process using Feun Kase seed extract in HCl media. Feun Kase seed extract was obtained by maceration extraction using methanol. In the corrosion inhibition test, the concentration and temperature variations were carried out to determine the effect on the inhibition efficiency and the corrosion rate per year. The results showed that the methanol extract of Feun Kase seeds contained secondary metabolites of alkaloids, flavonoids and saponins. The optimum inhibition efficiency was obtained at an inhibitor concentration of 30 ppm of 82.70% with a corrosion rate of 5.80 mm/year and at a temperature of 35ºC of 75.84% with a corrosion rate of 7.28 mm/year in the test of increasing the temperature of the corrosion medium. The morphological analysis of the zinc plate using the SEM instrument showed that the zinc plate without surface treatment (not immersed in HCl media) was still smooth. This is indicated by the surface of the zinc plate which is still clearly visible because it has not been affected by the corrosion medium. The zinc plate when immersed in HCl media, is damaged which is indicated by the presence of pores or holes. Zinc plate when added with Feun Kase seed extract in HCl media, the zinc surface was damaged but the damage was not as prominent as in HCl media without using an inhibitor.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46827371","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

Potensi Antimikroba dan Toksisitas Minyak Atsiri yang Diisolasi dari Biji Jintan (Carum carvi L.) 金坛必记的抑菌潜力及阿替西里油的毒性

Jurnal Riset Kimia Pub Date : 2022-09-30 DOI: 10.25077/jrk.v13i2.551

Suryati, Emil Salim, Gustia Elizar

{"title":"Potensi Antimikroba dan Toksisitas Minyak Atsiri yang Diisolasi dari Biji Jintan (Carum carvi L.)","authors":"Suryati, Emil Salim, Gustia Elizar","doi":"10.25077/jrk.v13i2.551","DOIUrl":"https://doi.org/10.25077/jrk.v13i2.551","url":null,"abstract":"Caraway (Carum carvi L.) is one of the oldest medicinal plants found in various countries such as West Asia, North Africa, Pakistan, India, North America, Northern Europe, Iran, Russia, and Indonesia. This plant has been use for traditional medicines to treat digestive disorders, flatulence, colic in infants, headaches, coughs, hypertension, eczema, pneumonia, diabetes, scabies, mouthwash and as an antiseptic. This plant is reported to contain around 1-9% essential oil in the seeds with various components and potential as bioactive compounds. In this study, essential oils were isolated from caraway seeds and determined their chemical content as well as their antimicrobial and toxicity. Isolation of essential oils was carried out by hydrodistillation and analysis of the chemical components of the isolated essential oils was carried out using the Gas Chromatography-Mass Spectrometry (GC-MS) method. The results of the GC-MS analysis showed the presence of 35 compounds with four main compounds, namely carvone (62.54%), limonene (23.39%), and trans-dihydrocarvone (8.20%). The antimicrobial activity test was carried out using the disc diffusion method, which showed strong activity against Staphylococcus aureus at a concentration of ≥75%, and against the fungus Candida albicans. The results of the toxicity test using the Brine Shrimp Lethality Test (BSLT) method showed that caraway seed essential oil was low toxic against Artemia salina Leach shrimp larvae with an LC50 value 568.3292 mg/L.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46028865","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

Ekstraksi Tanin dari Limbah Kulit Biji Asam dan Penggunaannya Sebagai Biomordan pada Pewarnaan Tenun Timor Secara Alami 从一种酸种子的废壳中提取单宁酸，并将其作为一种生物形态在东帝汶的自然染色中使用

Jurnal Riset Kimia Pub Date : 2022-09-30 DOI: 10.25077/jrk.v13i2.509

R. Adu, Marselina Theresia Djue Tea, Yunita Bouk

{"title":"Ekstraksi Tanin dari Limbah Kulit Biji Asam dan Penggunaannya Sebagai Biomordan pada Pewarnaan Tenun Timor Secara Alami","authors":"R. Adu, Marselina Theresia Djue Tea, Yunita Bouk","doi":"10.25077/jrk.v13i2.509","DOIUrl":"https://doi.org/10.25077/jrk.v13i2.509","url":null,"abstract":"Tannins from tamarind seed husk were extracted and applied as a biomordant for natural dyeing process of Timor woven fabrics. Tannins were extracted using hot distilled water, qualitatively and quantitatively analyzed and applied as a color binder to the woven fabrics. The color characteristics of woven fabrics with tannins were compared to the woven fabrics that mordanted with Al2(SO4)3 and FeSO4 at the concentration of 15%. Tamarind seed husk tannins are in the form of a brownish red powder. Qualitative and quantitative tests showed that tamarind seed coat contained condensed tannins with a total concentration of 70.08 ± 0.14%. Tannins identification by FT-IR spectroscopy showed a strong band absorption at 3369 cm-1 for O-H group and a weak absorption at 1721 cm-1 due to the C=O stretch. A strong absorption at 1611-1608 cm-1 was observed for C=C group in the aromatic ring and was strengthened with a strong absorption at 1520 cm-1, C-O-C group which is specific for condensed tannins was observed at 1285 cm-1. Application of 15% tannin as a biomordant without natural dye on Timor woven fabric produced a brownish red color, while the use of 15% tannin and turmeric dye showed a brownish yellow color. Tannin exhibited a better color fastness than metalic mordants in natural dyeing of Timor woven fabrics.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42176334","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

Sintesis Cepat Nanopartikel Perak dengan Irradiasi Gelombang Mikro dan Aplikasinya sebagai Antibakteri pada Kain Katun 微波快速合成纳米银及其在卡屯碱抗菌中的应用

Jurnal Riset Kimia Pub Date : 2022-09-30 DOI: 10.25077/jrk.v13i2.555

M. Alauhdin, A. Dzulfiqar, Arsenius Olfa Herlistyawan

引用次数: 0

Struktur, Sifat Dielektrik dan Optik Senyawa Aurivillius (Ca0,5Ba0,5)Bi4Ti4O15 yang Disintesis dengan Teknik Lelehan Garam 用脱盐技术设计的Aurivilius Society（Ca0,5Ba0,5）Bi4Ti4O15的结构、介电特性和光学性质

Jurnal Riset Kimia Pub Date : 2022-03-13 DOI: 10.25077/jrk.v13i1.463

S. Veronita, Upita Septiani, Zulhadjri Zulhadjri

引用次数: 1

Black Water Purification by Activated Carbon from Ilalang Weeds (Imperata cylindrica) Adsorbent in Peatland Rural Area 泥炭地农村Ilalang杂草吸附剂活性炭净化黑水

Jurnal Riset Kimia Pub Date : 2022-03-13 DOI: 10.25077/jrk.v13i1.449

N. Ngatijo, Heriyanti Heriyanti, Winda Arinda Putri, Aslan Irunsah, Bayu Ishartono, R. Basuki

{"title":"Black Water Purification by Activated Carbon from Ilalang Weeds (Imperata cylindrica) Adsorbent in Peatland Rural Area","authors":"N. Ngatijo, Heriyanti Heriyanti, Winda Arinda Putri, Aslan Irunsah, Bayu Ishartono, R. Basuki","doi":"10.25077/jrk.v13i1.449","DOIUrl":"https://doi.org/10.25077/jrk.v13i1.449","url":null,"abstract":"The black water containing humic acid, HA in peat land rural area is a serious issue. This study aims to synthesis of activated carbon, AC from Ilalang Weeds, IW (Imperata cylindrica) as low-cost adsorbent for HA. The success AC synthesis by H3PO4 activator from IW was evidently characterized by Fourier Transform Infra-Red, FTIR and Scanning Electron Microscopy, SEM. The effects of pH solution, initial HA concentration, and contact time were systematically studied to investigate the performance of Activated Carbon from Ilalang Weeds, ACIW. The results showed the increasing of Langmuir monolayer capacity of HA adsorption on carbon from IW before (49.75 mg g-1) and after (56.82 mg g-1) activation process at the pH optimum 6.0. The equilibrium adsorption data fitted with the isotherm model was shifted from multilayer Freundlich model (CIW) into monolayer Langmuir model as the consequences of increasing pore diameter size and active sites intensity. Calculation of adsorption energy by Dubinin-Radushkevich (EDR) model, 0.50 and 2.24 kJ mol-1 for CIW and ACIW, respectively, showed the increasing of physical affinity of HA with the active sites of adsorbent. Adsorption kinetics showed that the adsorption behavior followed the Ho pseudo-second-order kinetic model. The experimental results of this work demonstrate that the ACIW can be used as a promising low-cost adsorbent for HA removal for clean water production in peat land rural area. ","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43829237","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

Studi Karakterisasi dan Aktivitas Antibakteri Senyawa Kompleks dari Zink(II) Klorida, Kalium Tiosianat dan 2-Aminopiridina 氯化锌、硫辛酸钾和2-氨基吡啶硅抗菌复合物的特性及活性研究

Jurnal Riset Kimia Pub Date : 2022-03-13 DOI: 10.25077/jrk.v13i1.465

Dewi Mariyam, Nani Farida, Husni Wahyu Wijaya, I. W. Dasna

{"title":"Studi Karakterisasi dan Aktivitas Antibakteri Senyawa Kompleks dari Zink(II) Klorida, Kalium Tiosianat dan 2-Aminopiridina","authors":"Dewi Mariyam, Nani Farida, Husni Wahyu Wijaya, I. W. Dasna","doi":"10.25077/jrk.v13i1.465","DOIUrl":"https://doi.org/10.25077/jrk.v13i1.465","url":null,"abstract":"The development of complex compounds as antibacterial continues to be carried out to overcome cases of microbial resistance. One of them is the development of complex compounds with thiocyanate and aminopyridine ligands which show good potential as antibacterial. Complex compound of zinc(II) chloride with thiocyanate and 2-aminopyridine ligands was successfully synthesized. The synthesis was carried out by mixing the reactants with ratio of Zn2+: 2-aminopyridine: SCN 1:2:2 under heating and stirring continuously for 6 hours. The Obtained beam-shaped colorless crystals were characterized using melting point, electrical conductivity, thiocyanate ion qualitative, FTIR, SEM-EDX, XRD powder and antibacterial activity against Salmonella typhi and Staphylococcus aureus test. The crystals melt at 160-165 0C. The results of the electrical conductivity test, qualitative test of thiocyanate ion, FTIR and SEM-EDX analysis indicate the presence of Zn2+, thiocyanate and 2-aminopyridine with ratio 1: 2: 2. Based on XRD powder spectral data and theoritical analysis, the complex synthesized compounds had high crystallinity and predicted has tetrahedral structure. Antibacterial test showed that against S.aureus, the compound had higher antibacterial activity than free ligands, but lower than chloramphenicol. Therefore, the antibacterial activity of the complex compound was classified as moderate.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49078041","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 of 4-(5-(2,3-Dimenthoxyphenyl)-3-(4-Methoxyphenyl)-4,5-Dihydro-1H-Pyrazol-1-y1) Benzenesulfonamide as a Promosing Tyrosinase Inhibitor Candidate 促酪氨酸酶抑制剂4-(5-(2,3-二氧基苯基)-3-(4-甲氧基苯基)-4,5-二氢- 1h -吡唑-1-y1)苯磺酰胺的合成

Jurnal Riset Kimia Pub Date : 2022-03-13 DOI: 10.25077/jrk.v13i1.486

Rahayu Rahayu, Noval Herfindo, Nelly Oscifiani, N. Frimayanti, A. Zamri

引用次数: 2

Preparation and Characterisation of Composite Magnetite Fe3O4-Activated Carbon as Adsorben of Phenol 复合磁铁矿Fe3O4活性炭吸附苯酚的制备与表征

Jurnal Riset Kimia Pub Date : 2022-03-13 DOI: 10.25077/jrk.v13i1.442

I. Lestari, A. Yohana, Faizar Farid, D. R. Gusti

{"title":"Preparation and Characterisation of Composite Magnetite Fe3O4-Activated Carbon as Adsorben of Phenol","authors":"I. Lestari, A. Yohana, Faizar Farid, D. R. Gusti","doi":"10.25077/jrk.v13i1.442","DOIUrl":"https://doi.org/10.25077/jrk.v13i1.442","url":null,"abstract":"Preparation and characterization of magnetite Fe3O4-palm shell activated carbon composite has been carried out as an adsorbent of phenol compounds. Composites were preparation using the co-precipitation method by mixing Fe3O4 magnetite and suspension of activated carbon in water at 2:1 ratio by co-precipitation method. The functional groups, morphology and magnetization of the composites were characterized by FTIR, XRD, SEM-EDX and VSM. The XRD characterization result showed that the irregular activated carbon diffraction pattern on the composite showed that the carbon structure was amorphous and the peak was typical of Fe3O4 at an angle of 2θ 35.3961˚ with the distance of the diffraction plane or d = 2.53387Ǻ. VSM characterization shows the magnetic properties of magnetite are super paramagnetic with the resulting magnetization value of 15.93 emu/g, the remanence value (Mr) is 1.79 emu/g and the coercivity value (Hc) is 131.64 Oe. Adsorbent used for phenol adsorption with optimum at pH 6 with adsorption capacity was 6.71 mg/g, 120 minute contact time with adsorption capacity was 9.63 mg/g and the amount of phenol absorbed reached equilibrium a concentration of 300 mg/L of phenol with an adsorption capacity is 58.6 mg/g. The kinetics parameter showed that the adsorption followed pseudo second-order model.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49292578","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