Jurnal Kimia Valensi最新文献_第8页

Biosynthesis of ZnO Nanoparticles Using Pumpkin Peel Extract (Cucurbita moschata) and its Applications as Semiconductor in Dye Sensitized Solar Cell (DSSC) 南瓜皮提取物生物合成ZnO纳米粒子及其在染料敏化太阳能电池半导体中的应用

Jurnal Kimia Valensi Pub Date : 2021-11-23 DOI: 10.15408/jkv.v7i2.21046

N. Saridewi, Dzikri Anfasa Firdaus, I. Aziz, B. N. Kumila, D. Dasumiati

{"title":"Biosynthesis of ZnO Nanoparticles Using Pumpkin Peel Extract (Cucurbita moschata) and its Applications as Semiconductor in Dye Sensitized Solar Cell (DSSC)","authors":"N. Saridewi, Dzikri Anfasa Firdaus, I. Aziz, B. N. Kumila, D. Dasumiati","doi":"10.15408/jkv.v7i2.21046","DOIUrl":"https://doi.org/10.15408/jkv.v7i2.21046","url":null,"abstract":"ZnO nanoparticles are semiconductor materials that can be used in Dye Sensitized Solar Cells (DSSC). ZnO nanoparticles can be synthesized using pumpkin peel extract (Cucurbita moschata) which functions as a reducing agent, stabilizer, and capping agent. Zn(CH3COO)2.2H2O precursor was used with a concentration of 0.15 M at various pH 7, 8, and 9 reacted with pumpkin peel extract. The functional groups of pumpkin peel extract were characterized using Fourier Transform Infrared Spectroscopy (FTIR), the samples were analyzed by TEM and XRD. The resulting ZnO nanoparticles were used as semiconductors in Dye Sensitized Solar Cell (DSSC) using dyes from mangosteen peel.The FTIR results showed the presence of functional groups O-H hydroxy, CH2, secondary amides (R-CO-NR2, C-H and phosphate (PO43-). XRD results showed that ZnO produced wurzhite crystals with a hexagonal system and the smallest crystal size was 18.99 nm. TEM results showed that ZnO synthesized at a concentration of 0.15 M and pH 8 had a spherical particle shape with a size of 24.90 nm, while the DSSC test results had an efficiency of 9.06 x 10-4%.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44668400","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

Ligninase Profiling and Optimization of Laccase Production from Indigenous Wood Rot Fungus (WRF) KLUM2 in Kirk Medium-Alkali Lignin Kayu Jati (MK-ALKJ) 木腐真菌KLUM2在Kirk培养基碱木质素Kayu Jati（MK-ALKJ）中产漆酶的酶谱分析及优化

Jurnal Kimia Valensi Pub Date : 2021-07-28 DOI: 10.15408/jkv.v7i1.20895

S. Mutmainah, E. Susanti

{"title":"Ligninase Profiling and Optimization of Laccase Production from Indigenous Wood Rot Fungus (WRF) KLUM2 in Kirk Medium-Alkali Lignin Kayu Jati (MK-ALKJ)","authors":"S. Mutmainah, E. Susanti","doi":"10.15408/jkv.v7i1.20895","DOIUrl":"https://doi.org/10.15408/jkv.v7i1.20895","url":null,"abstract":"The production of ligninase by wood rot fungus (WRF) is determined by carbon source and growth condition. The goal of this study is to determine the ligninase profile produced by WRF KLUM2 in Kirk Medium using teak wood alkaline lignin as a carbon source known as Kirk Medium-Alkali lignin Kayu Jati (MK-ALKJ), optimization of dominant ligninase production in the MK-ALKJ compared to the one that is produced in the Kirk’s medium with glucose as a carbon source (MK-Glucose). This research was conducted in an experimental laboratory consisting of: (1) spore suspension preparation, (2) ligninase profiling at various growth times, (3) ligninase profiling at various temperature variations, (4) optimization of laccase production including pH and the amount of nitrogen source. Growth was identified based on the specific activity of lignin peroxidase (LiP), manganese peroxidase (MnP), and laccase. The results showed that relatively the three types of ligninase, namely LiP, MnP, and laccase, were produced in the same amount by the wood rotting fungus isolates KLUM2 in MK-ALJK. All three were produced with the highest yield of respectively 55.65; 52.48; 57.64 U/mg. Laccase as the dominant ligninase can be optimized to reach 83.52 U/mg by inoculating 2.107 spore cells in MK-ALKJ in 37 °C, pH = 3.5, and a nitrogen source of 20mM (NH4)2SO4 for 6 days. Therefore, it can be concluded that the ligninase activity of indigenous WRF KLUM2 in MK-ALJK medium is higher than in the MK-Glucose.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41913268","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

β-Sitosterol Compound from Dichloromethane Extracts of Kalanchoe tomentosa (Crassulacea) Leaves and Inhibition of α-amilase Activity 绒毛紫苏叶二氯甲烷提取物中的β-山竹醇化合物及其对α-淀粉酶活性的抑制作用

Jurnal Kimia Valensi Pub Date : 2021-07-23 DOI: 10.15408/jkv.v7i1.18443

L. Aisyah, Y. Yun, Firidia Puspita, Adelia Ilfani

{"title":"β-Sitosterol Compound from Dichloromethane Extracts of Kalanchoe tomentosa (Crassulacea) Leaves and Inhibition of α-amilase Activity","authors":"L. Aisyah, Y. Yun, Firidia Puspita, Adelia Ilfani","doi":"10.15408/jkv.v7i1.18443","DOIUrl":"https://doi.org/10.15408/jkv.v7i1.18443","url":null,"abstract":"Kalanchoe tomentosa is one of the plants of the Crassulaceae tribe that can lower blood sugar and contains compounds of terpenoids, flavonoids, alkaloids, saponins, tannins, fatty acids, steroids, and triterpenoids. This study aims to isolate and identify chemical compounds from dichloromethane extract of Kalanchoe tomentosa leaves, as well as to test the inhibitory activity of the α-amylase enzyme. Extraction was carried out by maceration using dichloromethane as a solvent, then dichloromethane extract was purified using column chromatography, the pure isolate was obtained in the form of white powder, and an inhibition test was carried out against the α-amylase enzyme. The thin layer chromatography data of pure isolates compared to pure β-sitosterol are similar. Based on the research data, it can be concluded that the chemical structure of the pure isolate is β-sitosterol, the methylene chloride extract of K. tomentosa leaves has an inhibitory activity against the α-amylase enzyme with an inhibition value of 65%. This value is greater than the positive control of acarbose which only has 37% inhibition and β-sitosterol compound by 6.7%. This value is smaller when compared to the control of acarbose at the same concentration which obtained 5% inhibition.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45315017","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

The Analysis of Low-Cost Pb(II) Adsorbents using Batch Method of Solid-Phase Spectrophotometry 间歇固相分光光度法分析低成本铅(II)吸附剂

Jurnal Kimia Valensi Pub Date : 2021-06-21 DOI: 10.15408/jkv.v1i1.18363

S. Saputro, A. Ashadi, L. Mahardiani, N. Y. Indriyanti, M. C. S. Kawedhar, Wima Pudya Ajunda

{"title":"The Analysis of Low-Cost Pb(II) Adsorbents using Batch Method of Solid-Phase Spectrophotometry","authors":"S. Saputro, A. Ashadi, L. Mahardiani, N. Y. Indriyanti, M. C. S. Kawedhar, Wima Pudya Ajunda","doi":"10.15408/jkv.v1i1.18363","DOIUrl":"https://doi.org/10.15408/jkv.v1i1.18363","url":null,"abstract":"Heavy metal pollutants contained in wastewater can cause health problems for living things around. Minor to fatal health problems can occur due to heavy metal poisoning, mainly caused by Pb(II) metal.. This study aimed to determine the optimum mass combination of rice husk and zeolite to adsorb Pb(II) metal ions in simulated wastewater, and to determine the sensitivity of the analysis method. This study used Solid Phase Spectrophotometry (SPS) to determine the decrease in Pb(II) metal ion levels after being adsorbed by activated carbon from rice husks and zeolites. This study used an experimental method with simulated wastewater samples containing Pb(II) at several concentrations. Pb(II) adsorption processes by rice husk and natural zeolite used various adsorbents' mass ratios. The adsorbents were characterized by using Fourier-Transform Infra-Red (FTIR) Spectrophotometry. Pb(II) analysis during adsorption processes used a single beam UV-visible Spectrophotometer for Solid-Phase Spectrophotometry. This study indicates that the combination of adsorbent from rice husk and natural zeolite can properly adsorb Pb(II) ions with an adsorption capacity of 0.75 μg g-1 and 0.025 μg L-1 for the LoD of the instrument.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48054134","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

Antioxidant Activities and Profile of Amino Acid of Yoghurt from Beef Milk Fermentation with Dadih Starter 大地发酵乳发酵酸奶抗氧化活性及氨基酸组成

Jurnal Kimia Valensi Pub Date : 2021-06-20 DOI: 10.15408/jkv.v1i1.20425

S. Y. Chalid, P. Kinasih, F. Hatiningsih, T. Rudiana

{"title":"Antioxidant Activities and Profile of Amino Acid of Yoghurt from Beef Milk Fermentation with Dadih Starter","authors":"S. Y. Chalid, P. Kinasih, F. Hatiningsih, T. Rudiana","doi":"10.15408/jkv.v1i1.20425","DOIUrl":"https://doi.org/10.15408/jkv.v1i1.20425","url":null,"abstract":"Dadih is naturally fermented buffalo milk in bamboo tubes and known to have antioxidant, antibacterial, and antihypertensive activity. Lactic acid bacteria in dadih can use as a starter to produce yogurt. The study aimed to produce yogurt of cow's milk with dadih as a starter, to determine the antioxidant activity and amino acid composition. Dadih is added with concentration variation of 2.5; 5; 7.5 and 10% (v/v) and it fermented for 48 hours at room temperature. Lactic acid bacteria cell counts of dadih were calculated by the total plate count method. Yogurt was tested by organoleptics with 33 panelists and proximate analysis water, ash, fat and protein contens based on the Association of Official Analytical Chemist (AOAC) in 2005. Antioxidant activities of yogurt were tested by DPPH method (1,1-diphenyl-2-picrylhydrazyl). Amino acid composition of yogurt was analyzed using ultra performance liquid chromatography (UPLC). The research result of amount of LAB on dadih are 1.01 x 1011 CFU/mL, has fulfilled the requirements of SNI 2981: 2009. Yogurt produced with the addition of dadih by 10% (v/v) is most accepted by panelists. The highest antioxidant activity was obtained by yogurt with 2.5% addition of dadih with IC50 value of 78.28 ppm. Yogurt almost contain all essential and non-essensial amino acids including tyrosine and phenylalanine as the antioxidants. Measurement of water, ash, protein and fat content in the sample meets the requirements of SNI 2981: 2009. ","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43069145","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: 4

Molecular Docking on Kokosanolide A and C for Anticancer Activity Against Human Breast Cancer Cell MCF-7 Kokosanolide A和C对人乳腺癌细胞MCF-7抗癌活性的分子对接

Jurnal Kimia Valensi Pub Date : 2021-06-11 DOI: 10.15408/jkv.v1i1.20534

S. Purwani, Julita Nahar, Z. Zulfikar, N. Nurlelasari, T. Mayanti

引用次数: 4

Ergosterol Peroxide and Stigmasterol from The Stembark of Aglaia simplicifolia (Meliaceae) and Their Cytotoxic against HeLa Cervical Cancer Cell Lines 苦参藤叶中过氧化麦角甾醇和豆甾醇及其对HeLa宫颈癌细胞株的细胞毒性研究

Jurnal Kimia Valensi Pub Date : 2021-06-09 DOI: 10.15408/JKV.V1I1.20068

Nunung Kurniasih, A. Supriadin, D. Harneti, R. Abdulah, M. Taib, U. Supratman

引用次数: 4

Synthesis of Mn(II) Complexes-Carboxymethyl Chitosan Schiff Base Salicylaldehyde and Antibacterial Activity 锰(II)配合物-羧甲基壳聚糖希夫碱水杨醛的合成及其抑菌活性

Jurnal Kimia Valensi Pub Date : 2021-06-04 DOI: 10.15408/JKV.V1I1.19866

I. Ismiyarto, Niken Windi Saputri, Liswinda Zafirah Rahmatia, P. R. Sarjono, N. Ngadiwiyana, N. Prasetya, Damar Nurwahyu Bima

{"title":"Synthesis of Mn(II) Complexes-Carboxymethyl Chitosan Schiff Base Salicylaldehyde and Antibacterial Activity","authors":"I. Ismiyarto, Niken Windi Saputri, Liswinda Zafirah Rahmatia, P. R. Sarjono, N. Ngadiwiyana, N. Prasetya, Damar Nurwahyu Bima","doi":"10.15408/JKV.V1I1.19866","DOIUrl":"https://doi.org/10.15408/JKV.V1I1.19866","url":null,"abstract":"The development of compounds with a better antibacterial activity is highly needed. One way to achieve this is by modifying the structure of the compound using chitosan as a starting material, because of its abundant natural source in Indonesia, its biodegradable properties, and its structure where free amines are present. This study aims to obtain Mn(II) -Carboxymethyl Chitosan Schiff Base-Salicylaldehyde complex to increase its antibacterial activity against Staphylococcus aureus (Gram positive) and Escherichia coli (Gram negative). Schiff Base carboxymethyl chitosan-salicylaldehyde was synthesized from carboxymethyl chitosan with salicylaldehyde. Next, the Schiff Base Carboxymethyl Chitosan-Salicylaldehyde was complexed with MnCl2.4H2O and then characterized by FTIR, UV-Vis Spectrophotometer, and AAS and tested for antibacterial activity with the disc diffusion method against Staphylococcus aureus and Escherichia coli. The product of Carboxymethyl Chitosan Schiff Base-salicylaldehyde is a brownish yellow solid with a yield of 64% (w/w) and has antibacterial activity against Staphylococcus aureus (clear zone diameter 11 mm) and Escherichia coli (clear zone diameter 13 mm). The product of Mn(II) Complexes-Carboxymethyl Chitosan Schiff Base-salicylaldehyde is a black solid with a yield of 59% (w/w) and has antibacterial activity against Staphylococcus aureus (clear zone diameter 13 mm) and Escherichia coli (clear zone diameter 17 mm).","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41374679","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

Hydroxyapatite (HAp) From Tenggiri Fish Bones As Abrasive Material In Toothpaste Formula 从腾基里鱼骨中提取羟基磷灰石作为牙膏配方的磨料

Jurnal Kimia Valensi Pub Date : 2021-06-04 DOI: 10.15408/JKV.V1I1.19165

Lia Anggresani, Yoli Nopita Sari, Rahmadevi Rahmadevi

{"title":"Hydroxyapatite (HAp) From Tenggiri Fish Bones As Abrasive Material In Toothpaste Formula","authors":"Lia Anggresani, Yoli Nopita Sari, Rahmadevi Rahmadevi","doi":"10.15408/JKV.V1I1.19165","DOIUrl":"https://doi.org/10.15408/JKV.V1I1.19165","url":null,"abstract":"Cavities are one of the factors of dental and oral health problems that can be prevented by brushing teeth using toothpaste. Toothpaste can be made from a variety of chemicals, one of which is hydroxyapatite (HAp) which has good biocompatible properties. Hydroxyapatite can be obtained by utilizing tenggiri fish bone waste which has the main element of calcium. Fish bones soaked with NaOH and acetone are then calcined at 800 °C for 3 hours to obtain CaO powder and characterized its elemental content using X-Ray Fluorescence (XRF). CaO obtained was then reacted with (NH4)2HPO4 with a mole ratio of Ca/P 1.67 then heated at 90 °C, added NaOH up to pH 12, then the obtained deposits are filtered and calcined at 900 °C. The solids obtained from the calcination are then characterized using X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM). Hydroxyapatite (HAp) was formulated into toothpaste with the concentrations of 0% (F0), 45% (F1), 50% (F2), and 55% (F3). Toothpaste was evaluated using organoleptic tests, homogeneity tests, foam height tests, spreadability tests, pH and hedonic tests. XRD analysis shows that the resulting hydroxyapatite (HAp) has a crystal structure in accordance with ICSD standard No. 96-900-3549. SEM analysis showed that granular particles measuring 0.1 μm–0.3 μm in size. All formulated toothpastes (F0, F1, F2, and F3) meet the requirements of a good toothpaste. Hydroxyapatite (HAp) can be formulated into a good toothpaste with a concentration of 45%.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42081530","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

Antibacterial Activity of Sugarcane Bagasse Nanocellulose Biocomposite with Chitosan Against Escherichia coli 甘蔗蔗渣纳米纤维素-壳聚糖生物复合材料对大肠杆菌的抗菌活性

Jurnal Kimia Valensi Pub Date : 2021-06-04 DOI: 10.15408/JKV.V1I1.18718

A. Hisbiyah, Lilik Nurfadlilah, Rohmawati Hidayah

{"title":"Antibacterial Activity of Sugarcane Bagasse Nanocellulose Biocomposite with Chitosan Against Escherichia coli","authors":"A. Hisbiyah, Lilik Nurfadlilah, Rohmawati Hidayah","doi":"10.15408/JKV.V1I1.18718","DOIUrl":"https://doi.org/10.15408/JKV.V1I1.18718","url":null,"abstract":"Antibacterials have been used to treat infectious diseases in both humans and animals since 1929. Along with their use, there is resistance to some antibacterials. 43% of Escherichia coli is resistant to various types of antibiotics. Therefore, research on the development of antibacterial ingredients is always being developed. Nanocellulose has received a lot of attention on its application of antibacterial material support. Meanwhile, chitosan is an antibacterial biopolymer with a brittle structure, hence nanocellulose is added to chitosan film to increase its structural stability. In this study, nanocellulose was extracted from sugarcane bagasse through a combination method of sulfuric acid hydrolysis with ultrasonic waves. The effect of addition of nanocellulose to chitosan mechanical properties was investigated. Scanning Electron Microscopy (SEM) characterization showed that there were differences in morphology between nanocellulose, chitosan, and nanocellulose-chitosan biocomposites. The result of X-Ray Diffraction and Fourier-transformed infrared spectroscopy analysis showed that biocomposites was successfully formed. The average size of nanocellulose particle was 132.67 nm. Nanocellulose-chitosan biocomposites with a ratio of 10:2 have the best antibacterial activity against Escherichia coli than other biocomposite ratios.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42251245","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