Jurnal Akademika Kimia最新文献

Antioxidant Activity Test of Ethanolic Extract of Tempuyung Leaves (Sonchus Arvensis L.) Based on Linoleic - Thiocyanic Method 天普容叶乙醇提取物抗氧化活性试验基于亚油酸-硫氰酸法

Jurnal Akademika Kimia Pub Date : 2023-05-30 DOI: 10.22487/j24775185.2023.v12.i2.pp116-122

Agus Suprijono, Dian Sulistiani, Sarosa Purwadi

{"title":"Antioxidant Activity Test of Ethanolic Extract of Tempuyung Leaves (Sonchus Arvensis L.) Based on Linoleic - Thiocyanic Method","authors":"Agus Suprijono, Dian Sulistiani, Sarosa Purwadi","doi":"10.22487/j24775185.2023.v12.i2.pp116-122","DOIUrl":"https://doi.org/10.22487/j24775185.2023.v12.i2.pp116-122","url":null,"abstract":"Free radicals chemically have free electrons, free radicals tend to take electrons from other molecules, which then give rise to abnormal compounds. Antioxidants are substances that can delay or prevent free radical oxidation reactions in lipid oxidation. Tempuyung leaves contain flavonoids which can act as antioxidants. This research aims to determine the antioxidant activity of the ethanol extract of tempuyung leaves using the linoleic-thiocyanate method and to determine the total phenolic and total flavonoid content using the Folin-Chiocalteu reagent method. The results showed that the ethanol extract of tempuyung leaf extract had antioxidant activity. Percentage of antioxidant activity of 10 % extract = 82.91 %, 5 % extract = 70.07 %, 1 % extract = 57.70 %, Vitamin E 1 % = 70.2 1%. Total phenolic content of 10% extract = 0.48 %, 5 % extract = 0.25 % and 1 % extract = 0.04 %. The total flavonoid content of the extract is 10 % = 0.14 %, 5 % extract = 0.07 %, and 1 % extract = 0.02 %. Pearson correlation test showed that phenolic and flavonoid compounds greatly influenced the antioxidant activity of the ethanol extract of tempuyung leaves.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75641230","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 of Fluorescent Carbon Dots from Soybean Residuals Using Hydrothermal Method 水热法制备大豆残渣荧光碳点

Jurnal Akademika Kimia Pub Date : 2023-05-30 DOI: 10.22487/j24775185.2023.v12.i2.pp71-77

S. Gea, D. G. Ayu, A. Andriayani, R. Goei

{"title":"Synthesis of Fluorescent Carbon Dots from Soybean Residuals Using Hydrothermal Method","authors":"S. Gea, D. G. Ayu, A. Andriayani, R. Goei","doi":"10.22487/j24775185.2023.v12.i2.pp71-77","DOIUrl":"https://doi.org/10.22487/j24775185.2023.v12.i2.pp71-77","url":null,"abstract":"Soybean residuals are biowaste composed of carbon chains and amine groups bounded in peptide linkages. The component was identified through FTIR analysis which showed the vibration of the diamide bond (N=C=N) at wave number 2132cm-1. Owing to the existence of these components, soybean has the potential to be used as a precursor to synthesize carbon nano-material, such as Carbon Dots (C - Dots). In this study, the synthesis of C - Dots material from soybean residuals was carried out using the facile hydrothermal method at a temperature of 200 oC for 6 hours. Afterward, the as-synthesized C - Dots were analyzed for their optical property, structure, and morphology. Based on the analysis of the UV - Vis and photoluminescent spectra, C - Dots exhibited absorbance peaks of 292 nm and 301 nm in the UV light region, and fluorescence emission peaks of 468 nm, with blue luminescence characteristics. The observation was supported by the morphological analysis using the HR - TEM, C - Dots exist in a spherical shape with an average particle size of 3.467 nm and a lattice distance of 0.363 nm. Besides, the C - Dots exhibited a good quantum yield of 28.15 %. From the results of the analysis, it is known that the synthesis of C - Dots material has been successfully carried out with particle size < 10 nm.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76945186","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

Performance of The Composite Electrode of Reduced Graphene Oxide Palm Oil Shell - Zinc Oxide (rGOCKS - ZnO) as a Chemical Oxygen Demand (COD) Sensor by Photoelectrocatalysis 还原性氧化石墨烯-棕榈油壳-氧化锌(rGOCKS - ZnO)复合电极作为化学需氧量传感器的光电催化性能

Jurnal Akademika Kimia Pub Date : 2023-05-30 DOI: 10.22487/j24775185.2023.v12.i2.pp123-131

T. Azis, Muhammad Z. Muzakkari, Muh. Nurdin, M. Maulidiyah, Wa O. Muslia, C. Bijang, Tahril Tahril

{"title":"Performance of The Composite Electrode of Reduced Graphene Oxide Palm Oil Shell - Zinc Oxide (rGOCKS - ZnO) as a Chemical Oxygen Demand (COD) Sensor by Photoelectrocatalysis","authors":"T. Azis, Muhammad Z. Muzakkari, Muh. Nurdin, M. Maulidiyah, Wa O. Muslia, C. Bijang, Tahril Tahril","doi":"10.22487/j24775185.2023.v12.i2.pp123-131","DOIUrl":"https://doi.org/10.22487/j24775185.2023.v12.i2.pp123-131","url":null,"abstract":"The preparation of reduced graphene oxide composite electrodes from palm shells (rGOCKS-ZnO) as a chemical oxygen demand (COD) sensor by photoelectrocatalysis has been successfully carried out. The preparation of rGOPS - ZnO electrodes by thermal reduction method and modified Hummer. The XRD results showed several peaks of rGOCKS - ZnO namely 23.287 º, 26.781 °, 29.889 °, 32.468 °, 35.109 °, 37.14 °, 39.822 °, 43.559 °, 47.927 °, and 48.537 °. SEM-EDX analysis reveals the surface of graphene sheets containing aggregates in the shape of small particles attached to graphene sheets. The results of the EDX analysis consisted of C 67.82 %, O. 19.2 %, Zn. 7.85 % and 5.13 % impurity. The CV and LSV tests showed that the rGOAK - ZnO electrode with a variation of 1 gram: 0.3 gram had a good response to the oxidation process under visible light. The profile tests of these organic dyes (methylene blue) in concentrations of 0.5 ppm, 1.0 ppm, 2.0 ppm, and 3.0 ppm were applied by Multi Pulse Amperometry (MPA). The performance of the rGOPS - ZnO electrode has been in determining the value of COD by photo electrocatalytic good sensitivity, linearity, limit of detection, repeatability, and service life. The COD value was determined using the rGOPS - ZnO electrode and obtained 2.97897 mg/LO2 close to the theoretical value.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75155611","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 of Silver Nanoparticles using Gandaria Seeds Bioreductor 利用甘达里亚种子生物反应器合成纳米银

Jurnal Akademika Kimia Pub Date : 2023-05-30 DOI: 10.22487/j24775185.2023.v12.i2.pp142-148

Catherina M. Bijang, Nurani Hasanela, Shielda N. Joris, Eirene G. Fransina, Tahril Tahril, Thamrin Azis, Ahmadin Tehuayo

{"title":"Synthesis of Silver Nanoparticles using Gandaria Seeds Bioreductor","authors":"Catherina M. Bijang, Nurani Hasanela, Shielda N. Joris, Eirene G. Fransina, Tahril Tahril, Thamrin Azis, Ahmadin Tehuayo","doi":"10.22487/j24775185.2023.v12.i2.pp142-148","DOIUrl":"https://doi.org/10.22487/j24775185.2023.v12.i2.pp142-148","url":null,"abstract":"The silver nanoparticles (NPP) are synthesized with the chemical reduction method by using a water extract bioreductor of gandaria seed (Bouea macrophylla G.) which acts as a reducing precursor, in this case, AgNO3 Ag+ is reduced to AgO. The concentration of AgNO3 is made between 0.5 mm and 1 mm. The characteristic of NPP is unstable, so a modification is needed with and without the addition of PVA 1 %. The process of NPP shaping is monitored by observing the uptaken of UV - Vis when the color changes occur. The high NPP concentration of AgNO3 has higher absorbance and is wider if compared to the lower AgNO3 concentration. The result of this research based on the absorbance value and the wavelength showed the NPP synthesized without the addition of PVA 1 % (b/v) is wider. The addition of PVA 1 % (b/v) provides better stability and maintains the absorbance of spectrum changes from day to day. The maximum uptaken of UV-Vis from NPP AgNO3 0.5 mm by using green synthesis and 1 mm without adding PVA are 0.946 and 0.980, respectively. However, NPP with the addition of PVA has 0.968 and 0.978 absorbance. The best concentration of NPP produced was 1 mm AgNO3.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135691734","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

Effect of Avocado Leaves Extract on Creatinin and Urea Levels in Rats Induced NaCl and Prednison 牛油果叶提取物对大鼠NaCl和强酸诱导的肌酐和尿素水平的影响

Jurnal Akademika Kimia Pub Date : 2023-05-30 DOI: 10.22487/j24775185.2023.v12.i2.pp108-115

Hilya U. Najwa, Novi Elisa, Ika Puspitaningrum, E. N. Anggraeny, A. K. Sundoro

{"title":"Effect of Avocado Leaves Extract on Creatinin and Urea Levels in Rats Induced NaCl and Prednison","authors":"Hilya U. Najwa, Novi Elisa, Ika Puspitaningrum, E. N. Anggraeny, A. K. Sundoro","doi":"10.22487/j24775185.2023.v12.i2.pp108-115","DOIUrl":"https://doi.org/10.22487/j24775185.2023.v12.i2.pp108-115","url":null,"abstract":"Creatinine and urea are metabolic waste substances excreted by the kidneys. Kidneys excrete metabolic waste substances. Renal dysfunction is associated with the increased level of creatinine and urea in the blood. The ethanolic extract of avocado leaves (Persea americana Mill.) contains flavonoid compounds, alkaloids, tannins, saponins, and steroids which act as antioxidants and antihypertensive. It is known to reduce creatinine and urea levels in the blood. The animal model was divided into five groups: normal control, negative control (CMC - Na 0.5 %), and avocado leaves ethanolic extract group with doses of 75, 150, and 250 mg/kg BW rats. All groups except the normal control group were induced by oral administration of NaCl solution 2 % and prednisone suspension 1.5 mg/kg BW rats for 21 days and following treatment by oral administration for 7 days based on its group. Flavonoid compounds of avocado leave ethanolic extract identified as 5,7-di-OH-dihydroflavonol. Results show Kruskal - Wallis test between groups (p < 0.05) is significantly different. Concluded that administration of avocado leaves ethanol extract at doses of 75, 150, and 250 mg/kg BW rats might reduce creatinine levels, while avocado leaves ethanol extract at a dose of 250 mg/kg BW rats could reduce urea levels.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79611749","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

Potential Antioxidant Activity in Octyl p - Methoxycinnamate (OPMC) Compound Synthesized by Sonochemical Method 声化学合成对甲氧基肉桂酸辛酯(OPMC)化合物的潜在抗氧化活性

Jurnal Akademika Kimia Pub Date : 2023-05-30 DOI: 10.22487/j24775185.2023.v12.i2.pp100-107

E. Indriyanti, Dhimas Adhityasmara, Masitoh S. Praharsiwi, Achmad Wildan, A. F. Masduqi, M. Syukur, Erli Mutiara, Rahmawati S. Dinurrossifa

{"title":"Potential Antioxidant Activity in Octyl p - Methoxycinnamate (OPMC) Compound Synthesized by Sonochemical Method","authors":"E. Indriyanti, Dhimas Adhityasmara, Masitoh S. Praharsiwi, Achmad Wildan, A. F. Masduqi, M. Syukur, Erli Mutiara, Rahmawati S. Dinurrossifa","doi":"10.22487/j24775185.2023.v12.i2.pp100-107","DOIUrl":"https://doi.org/10.22487/j24775185.2023.v12.i2.pp100-107","url":null,"abstract":"mic acid (PMCA) which is reacted with octanol in an acidic condition. OPMC has a substituted benzene group at the para position and conjugated at the carbonyl group. The method used to synthesize OPMC compounds is an esterification reaction with the help of ultrasonic waves at a sonication temperature of 60 0C for 4 hours. The synthesized compounds were then subjected to organoleptic tests, thin layer chromatography tests, solubility tests, melting point tests, FTIR - ATR, and GC - MS. The results showed that the OPMC results were in the form of fine white crystals. The qualitative test was carried out using thin-layer chromatography (TLC) showing an Rf value of 0.65 using n-hexane: ethyl acetate (4:1) eluent. OPMC synthesized is soluble in ethanol, methanol, chloroform, and ether and insoluble in water. The percentage yield of OPMC synthesized 55.72 % Melting point test with melting point apparatus showed that octyl p - methoxycinnamate started to melt at 50 0C. Analysis using FTIR - ATR showed 2919 and 2851 cm-1 (C - H alkyl) The absorption of the extended C=O ester group was at 1692 cm-1 close to the C=O ester (1712 cm-1). C=C group of alkenes and aromatics (1636, 1603, 1573, and 1510 cm-1). The stretching of the C-O ester group at wave number 1252 cm-1, Absorption for the stretching of the C-O ether group at wave number 1170 and 1167 cm-1. The wave number of 820 cm-1 indicates the presence of an aromatic group substituted at the para position. Tests with GC - MS found an abundance of compounds with 97.52 % base peak 290 m/z. Synthesized OPMC compounds have activity as a strong antioxidant with an IC50 value of 96.092 ppm.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75087218","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

Analysis of Water-Soluble Vitamin Change in Tomato (S.lycopersicum) Due to Ozonolysis of Imidacloprid Degradation Treatment by Using Spectrometry and HPLC Method 吡虫啉降解处理臭氧溶解对番茄水溶性维生素变化的光谱-高效液相色谱分析

Jurnal Akademika Kimia Pub Date : 2023-05-30 DOI: 10.22487/j24775185.2023.v12.i2.pp92-99

Tysa Donanita, Safni Safni, S. Suryati

引用次数: 0

Morphological Effect on Swelling Behaviour of Carboxymethyl Cellulose–Maleic Acid Hydrogel Modified with Kombucha Bacterial Cellulose 康普茶菌纤维素改性羧甲基纤维素-马来酸水凝胶溶胀行为的形态学影响

Jurnal Akademika Kimia Pub Date : 2023-05-30 DOI: 10.22487/j24775185.2023.v12.i2.pp86-91

Tanty N. Siahaan, Basuki Basuki, Amir H. Siregar, Dede I. Muthawali

引用次数: 0

Degradation of Natural Rubber as Asphalt Mixes Modifier using UV-Ozone Light uv -臭氧光降解天然橡胶作为沥青混合料的改性剂

Jurnal Akademika Kimia Pub Date : 2023-05-30 DOI: 10.22487/j24775185.2023.v12.i2.pp78-85

Irene I. C. Ritonga, T. Tamrin, M. Marpongahtun

引用次数: 0

SPF Activity Sunscreen Spray Gel Ethanol Extract of Cinnamon Bark (Cinnamomum burmanii Ness. BI, Syn) 肉桂树皮(Cinnamomum burmanii Ness)乙醇提取物的防晒喷雾凝胶。BI Syn)

Jurnal Akademika Kimia Pub Date : 2023-05-30 DOI: 10.22487/j24775185.2023.v12.i2.pp132-141

Wulan Sari, R. S. Kristantri, T. H. Pebriani

{"title":"SPF Activity Sunscreen Spray Gel Ethanol Extract of Cinnamon Bark (Cinnamomum burmanii Ness. BI, Syn)","authors":"Wulan Sari, R. S. Kristantri, T. H. Pebriani","doi":"10.22487/j24775185.2023.v12.i2.pp132-141","DOIUrl":"https://doi.org/10.22487/j24775185.2023.v12.i2.pp132-141","url":null,"abstract":"This cinnamon bark contains cinnamaldehyde, which is a secondary metabolite compound derived from aldehydes, including the polyphenolic group, which activity as a sunscreen and antioxidant by absorbing UV rays, so it can protect the skin from direct sun exposure (sunscreen). The study aimed to determine whether there was an effect of the concentration of the ethanol extract of cinnamon bark (Cinnamomum burmanii Ness. BI, Syn) on the physical characteristics and SPF value of spray gel preparations and to determine the concentration of the ethanol extract of cinnamon bark that produced spray gel with physical characteristics and SPF value. best. The study was conducted by extracting cinnamon bark by the maceration method using 96 % ethanol for 3 days. The extract obtained was then subjected to phytochemical screening TLC and then applied to a spray gel preparation with concentrations of FI (10 %), FII (15 %), and FIII (20 %), followed by testing the activity of sunscreen using the UV-Vis spectrophotometry method. The results of phytochemical screening and TLC on the ethanol extract of cinnamon bark showed positive results for containing flavonoids, alkaloids, tannins, steroids, and antioxidants. The statistical test results showed that there was a difference with a sig value of 0.05. It was concluded that the ethanol extract of cinnamon bark affected pH, viscosity, spreadability, stickiness, drying time, and SPF value. The formula that gave the best physical characteristics and SPF value was found in the concentration of sunscreen spray gel: the ethanol extract of cinnamon bark with a concentration of FIII (20 %).","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73382013","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