Rasayan Journal of Chemistry最新文献_第5页

ANTIOXIDANT ACTIVITY OF N-HEXANE, DICHLOROMETHANE, ETHYL ACETATE, AND METHANOL EXTRACTS OF Litsea cubeba Lour. BARKS 山苍子正己烷、二氯甲烷、乙酸乙酯和甲醇提取物的抗氧化活性。叫

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1628238

A. Dalimunthe, M. Muhammad, M. Rafi, V. M. Syafma, F. Hulwani, I. Aprilliawati, D. Satria

{"title":"ANTIOXIDANT ACTIVITY OF N-HEXANE, DICHLOROMETHANE, ETHYL ACETATE, AND METHANOL EXTRACTS OF Litsea cubeba Lour. BARKS","authors":"A. Dalimunthe, M. Muhammad, M. Rafi, V. M. Syafma, F. Hulwani, I. Aprilliawati, D. Satria","doi":"10.31788/rjc.2023.1628238","DOIUrl":"https://doi.org/10.31788/rjc.2023.1628238","url":null,"abstract":"Free radicals are molecules with unstable unpaired electrons and originate from environmental pollutants and from unhealthy people's lifestyles that reduce the quality of life in the presence of various degenerative diseases from premature aging, stroke, and even cancer. Antioxidants are used to neutralize, reduce and inhibit the formation of new free radicals in the body by becoming electron donors for free radicals so that free electrons in free radicals become paired and stop damage in the body. With the presence of antioxidant compounds, oxidative stress triggered by free radicals can be stabilized and neutralized to reduce the risk of damage to body cells. Indonesia is a country rich in spice plant resources. One type of spice plant that has the potential to be developed is Attarasa (Litsea cubeba Lour.) which is widely found in the North Tapanuli area. This plant contains essential oils in the fruit, stems, roots, and leaves. This makes all parts of this plant smell good. This study aimed to determine the antioxidant activity of a fraction of Litsea cubeba Lour. barks. The fraction with n-hexane, dichloromethane, ethyl acetate, and methanol as solvent. Antioxidant activities were determined with ABTS, CUPRAC, and O-Phenanthroline method. The data were analyzed using the Principle Component Analysis (PCA) multivariate exploration technique, which was analyzed using the Minitab software. The extracts were obtained IC50 values from the ABTS (395.65 ± 0.37; 344.78 ± 0.57; 30.37 ± 0.04; 283.07 ± 0.85); CUPRAC (220.77 ± 0.21; 144.50 ± 0.26; 10.00 ± 0.01; 11.13 ± 0.04); O-Phenanthroline (798.27 ± 0.06; 410.01 ± 0.23; 175.75 ± 0.25; 32.01 ± 0.03) respectively. While the total phenol was analyzed (23.56 ± 0.56; 2.63 ± 0.01; 77.44 ± 0.56; 600.21 ± 0.54) respectively. Based on the results obtained, the ethyl acetate extract of Litsea cubeba Lour. barks have antioxidant activity with a very strong category.","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69411490","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

BIOENERGY TRANSFORMATION OF PRESS MUD VIA ANAEROBIC DIGESTION USING IRON OXIDE NANOPARTICLES: AN ANALYSIS 利用氧化铁纳米颗粒厌氧消化对压浆进行生物能转化:分析

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1638011

S. Sundaranayagi, A. Sirajunnisa, S. Sarathkumar, Sk. Munimasthani

引用次数: 0

ANALYSIS OF DENSITY, BIODEGRADATION, AND MORPHOLOGY OF BIOPLASTIC COMPOSITES 生物塑料复合材料的密度、生物降解和形态分析

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1638313

D. Tanjung, R. S. Budi, M. Paramuji

引用次数: 0

A CAPILLARY GC-MS ANALYSIS OF RESIDUAL ETHANESULFONATES IN TENELIGLIPTIN 替尼格列汀中残留乙磺酸盐的毛细管气相色谱-质谱分析

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1628311

M. Manivannan, P. Parthiban, P. Ilayaraja

引用次数: 0

QUANTIFICATION OF HAZARDOUS HIGH BOILING SOLVENTS IMPURITIES IN ANTI-DIABETIC DRUG LINAGLIPTIN BY NOVEL GC-ALS METHOD DEVELOPMENT AND VALIDATION 新型气相色谱法定量降糖药利格列汀中有害高沸溶剂杂质

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1638331

Sachin S. Garad, Dhananjay V. Mane

{"title":"QUANTIFICATION OF HAZARDOUS HIGH BOILING SOLVENTS IMPURITIES IN ANTI-DIABETIC DRUG LINAGLIPTIN BY NOVEL GC-ALS METHOD DEVELOPMENT AND VALIDATION","authors":"Sachin S. Garad, Dhananjay V. Mane","doi":"10.31788/rjc.2023.1638331","DOIUrl":"https://doi.org/10.31788/rjc.2023.1638331","url":null,"abstract":"A new precise and accurate GC-ALS method was developed and validated for quantitative determination of hazardous high boiling solvents impurities i.e. acetic acid and dimethyl sulphoxide in Linagliptin drug molecule using direct injection technique by GC-ALS with the help of Flame ionization detector (FID). The column used was Agilent J & W DB-FFAP, 30M X 0.530 mm X 1µm capillary column. The stationary phase of the column was nitro terephthalic acid-modified polyethylene glycol (PEG). The method was validated for specificity, precision, LOD, LOQ, accuracy, linearity, range, solution stability, and robustness. The detection limit and quantitation limit obtained for acetic acid was 83.3µg/g and 252.4 µg/g respectively. For Dimethyl sulphoxide detection limit and quantitation limit obtained were 83.7 µg/g and 253.7 µg/g respectively. The method was found to be linear in the range between 253.9 µg/g to 7616.9 µg/g for acetic acid and 253.5 µg/g to 7605.8 µg/g for dimethyl sulphoxide. The average recoveries obtained were 85.20% and 89.69% at LOQ level for acetic acid and dimethyl sulphoxide respectively, and for 150% level recovery were 94.26% and 100.43% for acetic acid and dimethyl sulphoxide respectively. The developed method was found to be robust, specificity was also demonstrated, and standard and the spiked solution was stable for up 20 Hrs. Thus, the method is used for routine analysis of their intended use. For quantification of Acetic acid and Dimethyl sulphoxide in Linagliptin, no pharmacopeial method is available so developed this simple method for laboratory use.","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69412418","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

DETERMINATION OF SHELF LIFE OF AN AYURVEDIC FORMULATION KAISHORA GUGGULU USING RP-HPLC ANALYSIS OF CHEMICAL MARKERS 化学标记物反相高效液相色谱法测定阿育吠陀中药制剂枇杷膏的保质期

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1638336

Syeda Alisha Md Isha Ali, Niharika Gaddam, K. Bhat, B. Muddukrishna, Murlidhar Ballal, Sandeep G. Datarkar, S. G. Vasantharaju

引用次数: 0

THE ENERGY OF ACTIVATION FOR ACCELERATORS AND STABILIZERS IN ELECTROLESS COPPER COATING 化学镀铜中促进剂和稳定剂的活化能

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1628292

S. Rekha, S. Jothilakshmi, A. Kalicharan, R. Ranjani

引用次数: 0

PHOTOCATALYTIC DEGRADATION OF CONGO RED USING BISMUTH VANADATE-NICKEL SULPHIDE COMPOSITE 钒酸铋-硫化镍复合材料光催化降解刚果红

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1638260

J. Panwar, L. Joshi, R. Ameta, D. Soni

引用次数: 0

HYDROGEN PRODUCTION FROM ETHANOL BY STEAM REFORMING OVER NICKEL AND COBALT GEOTHERMAL WASTE SUPPORTED CATALYST 镍钴地热废弃物负载催化剂上蒸汽重整乙醇制氢

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1616808

引用次数: 1

PRODUCTION OF FERROALLOYS, CALCIUM CARBIDE, AND PHOSPHORUS FROM HIGH-SILICON PHOSPHORITE 从高硅磷矿中生产铁合金、电石和磷

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1628310

V.M. Shevko, R.A. Uteeva, A.B. Badikova, G.E. Karataeva, G.A. Bitanova

{"title":"PRODUCTION OF FERROALLOYS, CALCIUM CARBIDE, AND PHOSPHORUS FROM HIGH-SILICON PHOSPHORITE","authors":"V.M. Shevko, R.A. Uteeva, A.B. Badikova, G.E. Karataeva, G.A. Bitanova","doi":"10.31788/rjc.2023.1628310","DOIUrl":"https://doi.org/10.31788/rjc.2023.1628310","url":null,"abstract":"The article provides information on the interaction of Chilisai phosphorite with carbon, coke, and iron with the production of ferroalloy and calcium carbide and the extraction of phosphorus into gas. Research is conducted using computer thermodynamic modeling, mathematical planning of experiments, and electric smelting of phosphorites in an arc electric furnace. It is found that under equilibrium conditions the interaction occurs with the formation of iron silicides, calcium, silicon carbides, calcium, elemental silicon, aluminum, calcium, silicon oxide (ІІ), gaseous phosphorus (P4, P2), and iron phosphides. An increase in the amount of iron at 1,500-2,000oC increases the degree of extraction of silicon in the alloy but decreases the extraction of calcium in the calcium carbide, the concentration of silicon in the alloy, and the amount of calcium carbide. In the temperature range of 1,900-2,000oC in the presence of 16.8-19.8% of iron, phosphorus completely converts to gas, and there forms an alloy with 45-47.8% of Si and 1.6- 1.9% of Al and calcium carbide in the amount of 150-215 dm3 /kg (with the extraction of 60-63.6% of Si into the alloy and 50-56.4% of Ca into calcium carbide). Electric smelting of phosphorite in an arc furnace produces ferrosilicon of grade FS45 (40-44.7% of Si) with the extraction of 73.8% of silicone into it, as well as calcium carbide up to the second grade in the amount of 200-252 dm3 /kg. Phosphorus is almost completely (99.0-99.4%) reduced during electric smelting and converted into the gas phase.","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69411401","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