Indo. J. Chem. Res.最新文献_第7页

Chitosan as a Capping Agent of Silver Nanoparticles 壳聚糖对银纳米颗粒的封盖作用

Indo. J. Chem. Res. Pub Date : 2021-05-31 DOI: 10.30598//ijcr.2021.9-han

H. I. Badi'ah

引用次数: 2

Recovery of Gold in Au/Cu/Mg System from SH/Fe3O4@SiO2 as a Magnetically Separable and Reusable Adsorbent 磁可分离可重复利用吸附剂SH/Fe3O4@SiO2中Au/Cu/Mg体系中金的回收

Indo. J. Chem. Res. Pub Date : 2021-05-31 DOI: 10.30598//ijcr.2021.9-ani

Anis Qomariyah, N. Nuryono, E. S. Kunarti

{"title":"Recovery of Gold in Au/Cu/Mg System from SH/Fe3O4@SiO2 as a Magnetically Separable and Reusable Adsorbent","authors":"Anis Qomariyah, N. Nuryono, E. S. Kunarti","doi":"10.30598//ijcr.2021.9-ani","DOIUrl":"https://doi.org/10.30598//ijcr.2021.9-ani","url":null,"abstract":"The recovery of Au(III) in the Au/Cu/Mg system from mercapto-silica hybrid coated magnetite (SH/Fe3O4@SiO2) adsorbent has been investigated. This adsorbent characterized using FT-IR to determine functional groups, crystallinity study using XRD, surface morphology using SEM, material compositions with XPS, surface area using nitrogen adsorption, and TGA to study thermal stability. Adsorption of metal ions carried out with batch system for 30 minutes at a pH of 3. In the Au/Cu/Mg multi-metal system, Au(III) ions were easily desorbed (approximately 85%) by SH/Fe3O4@SiO2 adsorbent based on HSAB (Hard Soft Acid Base) theory that Au(III) ion is a softer metal than Cu(II) and Mg(II) where Au(III)>Cu(II)>Mg(II). The recovery of Au(III) ions was easily desorbed using thiourea 7% in 0,1 M HCl solution with the percentage of 79%. The process of SH/Fe3O4@SiO2 adsorbent separation after adsorption and recovery was very easy. The adsorbent could perfectly separate in 5 minutes using an external magnet. The SH/Fe3O4@SiO2 adsorbent can be reused on the adsorption-desorption process of Au(III) in the Au/Cu/Mg system approximately four times of cycle reactions.","PeriodicalId":13392,"journal":{"name":"Indo. J. Chem. Res.","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81751070","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

Chemical Analysis of Rice from Converted-to-Organic Paddy Field in Lombok Island 龙目岛有机稻田水稻化学成分分析

Indo. J. Chem. Res. Pub Date : 2021-05-31 DOI: 10.30598//ijcr.2021.9-lal

L. R. Savalas, I. N. Loka, J. Ardhuha

{"title":"Chemical Analysis of Rice from Converted-to-Organic Paddy Field in Lombok Island","authors":"L. R. Savalas, I. N. Loka, J. Ardhuha","doi":"10.30598//ijcr.2021.9-lal","DOIUrl":"https://doi.org/10.30598//ijcr.2021.9-lal","url":null,"abstract":"Chemical analysis has been undertaken to investigate the nutrients compositions and the presence of residual pesticides from rice cultivated from converted-to-organic paddy fields in Lombok Island. The nutrients being investigated were macronutrients (carbohydrates, fat, and proteins), micronutrients (beta-carotene), metal ions, and minerals, whereas pesticides being investigated were organo-chlorides residues such as endrin, delta-BHC, dieldrin, etc. The chemical analysis results were compared to those from rice cultivated from conventional farming, which uses chemical pesticides. It was revealed that there is no difference in the nutrients compositions of rice produced from converted-to-organic paddy fields to those from conventional farming. Moreover, it was shown that both rice samples from converted-to-organic and conventional farming paddy fields have no detectable residual pesticides. This finding suggests that the absence of residual pesticides from rice samples does not necessarily correspond to the application of organic farming in the converted-to-organic land. There is not robust evidence that the application of organic alters the nutrient composition of rice. This result also underlines the need to further investigate the real benefits of organic rice farming products in terms of nutritional composition and safety.","PeriodicalId":13392,"journal":{"name":"Indo. J. Chem. Res.","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85697243","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

Preparation of Natural Ouw Clay-Chitosan Composite and Its Application as Lead and Cadmium Metal Adsorbent 天然粘土-壳聚糖复合材料的制备及其作为铅镉金属吸附剂的应用

Indo. J. Chem. Res. Pub Date : 2021-05-31 DOI: 10.30598//ijcr.2021.9-bij

C. Bijang, M. Tanasale, Adhi G. Kelrey, Inda Ulfa Mansur, T. Azis

引用次数: 6

Antibacterial Effectiveness of Syzygium cumini (L.) Skeels Leaves to Escherichia coli pBR322 茴香合子的抗菌作用大肠杆菌pBR322

Indo. J. Chem. Res. Pub Date : 2021-05-30 DOI: 10.30598//ijcr.2020.9-jan

J. K. Mere, M. Bintang, M. Safithri

{"title":"Antibacterial Effectiveness of Syzygium cumini (L.) Skeels Leaves to Escherichia coli pBR322","authors":"J. K. Mere, M. Bintang, M. Safithri","doi":"10.30598//ijcr.2020.9-jan","DOIUrl":"https://doi.org/10.30598//ijcr.2020.9-jan","url":null,"abstract":"Bacterial resistance is a serious problem that until now still has become a global problem. The search for new antibacterial compounds is needed to overcome this problem. Syzygium cumini (L.) Skeels is a plant known to contain bioactive compounds that can be used as an antibacterial agent. This study aims to explore the leaves of this plant as an antibacterial against Escherichia coli pBR322 resistant bacteria. Based on the antibacterial test results, extracts and leaf fractions of this plant can inhibit bacterial growth. Ethyl acetate fraction at a concentration of 800 ppm showed strong antibacterial activity with an inhibition zone diameter of 10.36±0.02 mm followed by ethanol extract and other fractions, namely 8.43±0.01 mm (ethanol extract), 7.24±0.01 mm (water fraction), and 1.45±0.01 mm (n-hexane fraction). The results of spectrophotometric MIC determination also showed inhibition against bacterial growth, which was marked by a decrease in the absorbance value at the lowest antibacterial concentration of 600 ppm from 0.454 to 0.070 at wavenumber 600 nm after 24 hours of incubation. The decrease in the absorbance value indicated that the antibacterial properties of the plant leaves at this concentration were effective in inhibiting bacterial growth.","PeriodicalId":13392,"journal":{"name":"Indo. J. Chem. Res.","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90231520","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: 5

Synthesis of Pentapeptide FWKVV (Phe-Trp-Lys-Val-Val) and Its Activity as Antioxidants 五肽FWKVV (ph - trp - lys - val - val)的合成及其抗氧化活性

Indo. J. Chem. Res. Pub Date : 2021-05-29 DOI: 10.30598//ijcr.2021.9-eka

E. Yanti, Eviyanti Nazareth, Yuana Dwi Agustin, M. Usman

引用次数: 1

Patchouli Oil Isolation and Identification of Chemical Components Using GC-MS 广藿香精油化学成分的GC-MS分离与鉴定

Indo. J. Chem. Res. Pub Date : 2020-09-30 DOI: 10.30598//IJCR.2020.8-FAS

F. A. Souhoka, Andi Zulkifli Al Aziz, Nazudin Nazudin

引用次数: 6

Stability Indicating RP-HPLC for Quantification Mangiferin in Extract of Three Species Mango Leaves 稳定性指示反相高效液相色谱法定量测定三种芒果叶提取物中的芒果苷

Indo. J. Chem. Res. Pub Date : 2020-05-31 DOI: 10.30598/10.30598//ijcr.2020.8-yun

Y. Retnaningtyas, Nia Kristiningrum, H. D. Renggani, Indah Purnama Sary

{"title":"Stability Indicating RP-HPLC for Quantification Mangiferin in Extract of Three Species Mango Leaves","authors":"Y. Retnaningtyas, Nia Kristiningrum, H. D. Renggani, Indah Purnama Sary","doi":"10.30598/10.30598//ijcr.2020.8-yun","DOIUrl":"https://doi.org/10.30598/10.30598//ijcr.2020.8-yun","url":null,"abstract":"The stability indication of Reversed Phase-High Performance Liquid Chromatography (RP-HPLC) method was validated for quantitative determination of mangiferin on three species mango leaves (Mangifera odorata Griff, Mangifera foetida Lour, and Mangifera indica L.). The samples were extracted by maseration method using methanol and concentrated using rotary evaporator. The method carried out on stationary phase a purospher RP-18 endcapped (25 cm × 4.6 mm i.d., 5 µm) column with a mobile phase consisting of methanol: phosphoric acid 0.1% (v/v) (31:69); flow rate:0.8 mL/min; solvent methanol, detection was carried out at 258 nm. The analytical performace this measurement is good with the value of linearity (r2=0.998), precision (%RSD=0.649%), and accuration (10.67%). The forced degradation studies were carried out according to the International Conference on Harmonization (ICH) guidelines. The results indicating that the complete separation between degradation products and mangiferin peak occured. The degradation limit of mangiferin 5–20% (according to the guideline of ICH) except in basic condition (100%). The method was succesful applied to determine of the mangiferin in pakel (Mangifera foetida), kweni (Mangifera indica) and kopyor (Mangifera odorata) extract. The mangiferin content was obtained are pakel (9.95%), kopyor (7.40%) and kweni (Mangifera odorata) (2.49%) respectively.","PeriodicalId":13392,"journal":{"name":"Indo. J. Chem. Res.","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82386091","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

Variasi Jarak Antar Layer Bentonit Pada Pembuatan Nanokomposit Pla-Bentonit Sebagai Kemasan Makanan

Indo. J. Chem. Res. Pub Date : 2020-05-31 DOI: 10.30598/10.30598//ijcr.2020.8-vit

Vita Wonoputri, Natasha Emanuella, Evelyn Angelica, J. P. Sitompul

{"title":"Variasi Jarak Antar Layer Bentonit Pada Pembuatan Nanokomposit Pla-Bentonit Sebagai Kemasan Makanan","authors":"Vita Wonoputri, Natasha Emanuella, Evelyn Angelica, J. P. Sitompul","doi":"10.30598/10.30598//ijcr.2020.8-vit","DOIUrl":"https://doi.org/10.30598/10.30598//ijcr.2020.8-vit","url":null,"abstract":"In this study, bentonite was used as a filler in the synthesis of polylactic acid (PLA) nanocomposite. The mechanical property of PLA-Bentonite nanocomposite was treated using two different surfactants, namely octadecyl amine (ODA) and trimethyl stearyl ammonium chloride (TSC) at two different concentration (20 mmol and 40 mmol). The treatments of ODA and TSC in the matrix with regards to the basal spacing of bentonite stacks measured by X-Ray Diffraction (XRD) analysis. The results showed a significant increase in basal spacing was obtained when TSC 40 was applied for treatment. Data of Fourier Transform Infrared Spectroscopy (FTIR) suggested that this increase was caused by the incorporation of surfactant into the bentonite stacks. Most of the PLA-Bentonite nanocomposite can form intercalation structure, while a sample containing TSC 40 formed exfoliation structure. This exfoliation structure resulted in a film with the best tensile strength and water vapor permeability compared to the others. The film containing TSC 40 showed the lowest reduction in water activity, almost similar to the bread sample wrapped using conventional plastic. The bread wrapped with TSC 40 film was not grown by fungi as opposed to the conventional plastic, showing the potential of the nanocomposite film as food packaging.","PeriodicalId":13392,"journal":{"name":"Indo. J. Chem. Res.","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88502021","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

Pengaruh Tekanan Dan Tahap Kompresi Dalam Pemurnian Biogas Menjadi Biometana Dengan Absorpsi CO2 Menggunakan Air Bertekanan 压力和阶段的压缩将沼气净化成生物甲烷与使用高压水吸收二氧化碳

Indo. J. Chem. Res. Pub Date : 2020-05-31 DOI: 10.30598/10.30598//ijcr.2020.8-ang

Anggit Raksajati, Tri Partono Adhi, D. Ariono

{"title":"Pengaruh Tekanan Dan Tahap Kompresi Dalam Pemurnian Biogas Menjadi Biometana Dengan Absorpsi CO2 Menggunakan Air Bertekanan","authors":"Anggit Raksajati, Tri Partono Adhi, D. Ariono","doi":"10.30598/10.30598//ijcr.2020.8-ang","DOIUrl":"https://doi.org/10.30598/10.30598//ijcr.2020.8-ang","url":null,"abstract":"Palm oil mill effluent (POME) from condensate stew, hydrocyclone water, and sludge separator contains organic carbon with a COD more than 40 g/L and a nitrogen content of about 0.2 and 0.5 g/L as ammonia nitrogen and total nitrogen. At present, the POME is converted into biogas using anaerobic ponds. Biogas produced contains 60% methane (CH4) and 40% carbon dioxide (CO2) and can be purified into biomethane through CO2 absorption using water. This study evaluates the optimum pressure and feed compression stage in biogas upgrading into biomethane. The results show the rate of circulation of water needed to separate CO2 from biogas feed decreases with increasing absorber pressure due to increased solubility of CO2 in water. Water circulation pumps and biogas compressor works increase due to the increase in pressure difference needed. The optimum pressure of the biogas biogas purification unit is within the range of 7-10 bar. At the same absorber pressure, the 1 stage feed compression unit is cheaper than that of 2 stages. However, the overall process with 1 compression stage might not be more economical than the 2-stage if consider the higher methane loss.","PeriodicalId":13392,"journal":{"name":"Indo. J. Chem. Res.","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90920464","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