Journal of Chemical Natural Resources最新文献_第5页

Bacterial Cellulose-BasedBiodegradable Plasticfrom Pineapple (Ananassativus) Skin Waste: The Effectof Sorbitol On The QualityOf The Biodegradableplastic 菠萝皮废弃物细菌纤维素基生物降解塑料:山梨糖醇对生物降解塑料质量的影响

Journal of Chemical Natural Resources Pub Date : 2019-02-28 DOI: 10.32734/jcnar.v1i1.835

A. Putra

{"title":"Bacterial Cellulose-BasedBiodegradable Plasticfrom Pineapple (Ananassativus) Skin Waste: The Effectof Sorbitol On The QualityOf The Biodegradableplastic","authors":"A. Putra","doi":"10.32734/jcnar.v1i1.835","DOIUrl":"https://doi.org/10.32734/jcnar.v1i1.835","url":null,"abstract":"The aim of this research was to investigate the effect of sorbitol on the quality ofbacterial cellulose-based biodegradable plastic from pineapple skin waste. Various concentrations of sorbitol as the plasticizer were added into a fermentation medium in the synthesis of bacterial cellulose-sorbitolcomposite (BCSC). The BCSCobtainedwas purified by soaking it into a cycled water-NaOH-water. The purified BCSC wasthen compressed using a hot press with the pressure of 300 psi to obtain BCS plastic. The BCS plasticwas characterized in the aspect of physical properties (water content,the degree of swelling), mechanical properties (tensile strength,elongation, elasticity), molecular structure (functional groups, thedegree of crystallinity), and biodegradability. The results showed that the percentage ofwater content anddegree of swelling of theBCS plastic increased with the addition of sorbitol concentrations. The maximum tensile strength was obtained with the addition of 10.5% sorbitol (%v/v). The degrability of the BCS plastic was up to 59% until the 9th day. TheFTIR results showed that functional groups appeared in the BCS plastic were similar to those of the BC. The degree of crystallinity of the BCSplastic decreased with the increasing concentration of sorbitol.","PeriodicalId":15309,"journal":{"name":"Journal of Chemical Natural Resources","volume":"83 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85277803","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 4-Alil-6- (Hydroxymethyl) -2-Methody Phenol Compounds from Eugenol Through Mannich Reaction Followed Methylation with Methyl Iodide and Subtitution Using NaOH 丁香酚经曼尼希反应、碘化甲酯甲基化、氢氧化钠取代合成4-芳il-6-(羟甲基)-2- methody苯酚化合物

Journal of Chemical Natural Resources Pub Date : 2019-02-28 DOI: 10.32734/jcnar.v1i1.838

Sabarmin Perangin-angin

{"title":"Synthesis Of 4-Alil-6- (Hydroxymethyl) -2-Methody Phenol Compounds from Eugenol Through Mannich Reaction Followed Methylation with Methyl Iodide and Subtitution Using NaOH","authors":"Sabarmin Perangin-angin","doi":"10.32734/jcnar.v1i1.838","DOIUrl":"https://doi.org/10.32734/jcnar.v1i1.838","url":null,"abstract":"Eugenol derivative compound 4-allyl-6-hydroxymethyl-2-methoxy phenol was synthesized through Mannich reaction, methylation, dan nucleophilic substitution. Mannich reaction was carried out by reacting eugenol, formaldehyde 37%, and dimethylamine 40 % in reflux condition with n-heptane solvent at temperature 98o-100oC for 10 hours produced 4-allyl-6-(dimethylamino)methyl-2-methoxy phenol with yield of 83 %. The formation of dimethylaminomethyl group supported by C-N stretching vibration at 1246,16 cm-1 and ion molecule peak at 221 in GC-MS analysis. Methylation of 4-allyl-6-(dimethylamino)methyl-2-methoxy phenol was carried out with methyl iodide in ethanol solvent produced 6-((N-iodo-N-methyl-N-methyl-N-methylamino) methyl)-4-allyl-2-methoxy phenol in solid form, which then purified by recrystallization with 78,15 % yield. 4-allyl-6-(hydroxymethyl)-2-methoxy phenol was synthesized by nucleophilic substitution reaction of 6-((N-iodo-N-methyl-N-methyl-N-methylamino)methyl)-4-allyl-2-methoxy phenol with sodium hydroxide in reflux condition then purified by coloum chromatography gave liquid compound with yield of 65,05%. The formation of hydroxymethyl group supported by OH vibration at 3433,9 cm-1 and ion molecule peak at 194 in GC-MS analysis show the relative molecular mass of synthesized product.","PeriodicalId":15309,"journal":{"name":"Journal of Chemical Natural Resources","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79645977","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

Antimicrobial Activity of Dadap Serep (Erythrina subumbrans (Hassk.) Merr.) Leaves Extract 大黄菌的抑菌活性研究稳定)。叶萃取精华

Journal of Chemical Natural Resources Pub Date : 2019-02-28 DOI: 10.32734/jcnar.v1i1.834

Diah Tri Utami

{"title":"Antimicrobial Activity of Dadap Serep (Erythrina subumbrans (Hassk.) Merr.) Leaves Extract","authors":"Diah Tri Utami","doi":"10.32734/jcnar.v1i1.834","DOIUrl":"https://doi.org/10.32734/jcnar.v1i1.834","url":null,"abstract":"The leaves of Erythrina has been used in Indonesia as a remedy for rheumatism, stomach-ache, asthma, dysentery, contact dermatitis, eczema and skin infections. However, there have been limited phytochemical or biological studies on the leaves of E. subumbrans and there are not studies that align with its traditional medicinal uses. The aim of this study was to assess the antimicrobial activity of the leaves of E. subumbrans to support its topical use in the treatment of skin infections. Disc diffusion agar assays were used to determine the antimicrobial activities of ethanol extracts of the leaves of E. subumbrans.The ethanol extracts showed the most significant activity with MIC values of 0,5 µg/mL. against a sensitive strain of Staphylococcus epidermidis. Extract concentration of 0,5 mg/ml, 1 mg/ml, 5 mg/ml and 10 mg/ml showed inhibition zone continuously as high as 1,83 mm; 3,42 mm; 5,17 mm, and 8,00 mm. The ethanol extracts of the leaves of E. subumbrans also showed significant activity against Candida albicans with MIC values of 0,5 µg/mL. Extract concentration of 0,5 mg/ml, 1 mg/ml, 5 mg/ml and 10 mg/ml showed inhibition zone continuously as high as 4,00 mm; 4,17 mm; 5,25 mm, and 6,50 mm. Bioactive substance test showed that alkaloid, flavonoid, saponin, and triterpenoid were found in E. subumbrans extract indicates potential activity as antimicrobial agent. These results provide support for the customary (traditional and contemporary) use of E.subumbrans leaves for the treatment of nosocomial infections.","PeriodicalId":15309,"journal":{"name":"Journal of Chemical Natural Resources","volume":"37 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91401870","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

In Vitro Determination of SunProtective Factor (SPF) of Dadap Serep (Erythrina Subumbrans (Haks.) Merr.) Leaf Extract Using Spectrophotometric Method 大赤藓防晒因子(SPF)的体外测定稳定)。叶提取物分光光度法

Journal of Chemical Natural Resources Pub Date : 2019-02-28 DOI: 10.32734/jcnar.v1i1.836

Indri Maharini

引用次数: 4

Antibacterial Activities of Rough Lemon (Citrus jambhiri Lush) Rind Essential Oil 粗柠檬(Citrus jambhiri Lush)皮精油的抗菌活性

Journal of Chemical Natural Resources Pub Date : 2019-02-28 DOI: 10.32734/jcnar.v1i1.830

H. Sembiring

引用次数: 7