Indonesian Journal of Chemical Science and Technology (IJCST)最新文献_第9页

Antimicrobial Activities of Bioactive Compounds from Jatropha curcas 麻疯树生物活性化合物的抗菌活性研究

Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2020-01-07 DOI: 10.24114/IJCST.V2I1.12366

Zona Octarya, Fitri Refelita, Novia Rahim

引用次数: 0

Potential of Bio-briquette of Pineapple Crown Waste (Ananas comosus (L.) merr 凤梨冠废弃物生物型煤的潜力

Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2020-01-07 DOI: 10.24114/IJCST.V2I1.12370

Kurnia Nur Addina, Lazulva Lazulva

引用次数: 1

Synthesis and Characterization Nanomagnetite by Co-precipitation 共沉淀法合成纳米磁铁矿及表征

Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2019-07-12 DOI: 10.24114/ijcst.v2i2.13995

R. Rahimah, A. Fadli, Yelmida Yelmida, N. Nurfajriani, Z. Zakwan

{"title":"Synthesis and Characterization Nanomagnetite by Co-precipitation","authors":"R. Rahimah, A. Fadli, Yelmida Yelmida, N. Nurfajriani, Z. Zakwan","doi":"10.24114/ijcst.v2i2.13995","DOIUrl":"https://doi.org/10.24114/ijcst.v2i2.13995","url":null,"abstract":"Magnetite (Fe3O4) nanoparticles becomes a new innovation that gets attention of biomedicine scientists. Magnetite can be applied to cancer treatment as a drug carrier because it’s good biocompatibility and very low toxicity. The aim of this study was to determine the effect of temperature and retention time on the magnetite particle characteristics prepared by co-precipitation method. The first, FeCl3 and FeCl2 with 2:1 mole ratio were reacted with 10% NH4OH at 40 - 80°C temperatures during 1 – 30 minutes in a beaker glass. Subsequently, the precipitate was separated using filter paper and it dried into air oven at 100°C. The characteristic of obtained magnetite powder were determined using XRD and SEM. From XRD pattern indicates that magnetite formed at all temperatures with crystallite diameter in the range of 7-13 nm. The SEM results indicate the agglomeration of the magnetite particles with size in the range of 1.37 to 1.72 μm. In the other hand, the higher of temperature and retention time will make the agglomeration of the particles become more uniform. The increasing of temperature and the retention time will increase the magnetite crystallinity level.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87203478","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

Using Water Hyacinth Fiber ( Eichhornia Crassipes) as Heat Absorbers Media In Wall 水葫芦纤维作为墙体吸热介质的研究

Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2019-07-12 DOI: 10.24114/ijcst.v2i2.13996

M. Amin, Sefri Wahyu Fernando Gultom, Fitrisia Krisa Bella, P. Luthan

{"title":"Using Water Hyacinth Fiber ( Eichhornia Crassipes) as Heat Absorbers Media In Wall","authors":"M. Amin, Sefri Wahyu Fernando Gultom, Fitrisia Krisa Bella, P. Luthan","doi":"10.24114/ijcst.v2i2.13996","DOIUrl":"https://doi.org/10.24114/ijcst.v2i2.13996","url":null,"abstract":"Water hyacinth is aquatic weed plant that has medium fiber content with length about 1.75 – 2.12 mm and diameter about 11.15 – 11.65 μm in its stem. Water hyacinth contains 90% of water by weight reduction from 10 Kg when wet to 1 Kg when dry. In dry conditions, water hyacinth contains crude protein 13.03%, crude fiber 20.6%, fat 1.1%, ash 23.8% and the rest is vortex that contains polysaccharides and minerals. Research was done to obtain the design of heat absorbing product that modified with additional of water hyacinth. The method that was uesd begin with drying water hyacinth to obtain good fiber. water hyacinth fibers then mixed with cement and sand which are made as composites in order to reduce the heat of room. The result of the research is make a product that can overcome thermal comfort problems in deep room temperature condition. Water hyacinth was chosen because it is easy to obtain, cheap and can reduce environmental pollution (biodegradability) so that the composite can overcome environment ptoblem and its used doesn’t endanger health. Based on the test result by providing a heat source of 40 Watt bulb lamp to the media for 15 minutes, it was found that the final temperature of the media 1 without additional of water hyacinth fiber was 32.5oC, final temperature of media 2 with additional of 100 gr water hyacinth was 32.2oC, and the final temperature of media 3 with additional 150 gr water hyacinth was 31.7oC. it shows heat temperature that is released and cannot be absorbed by composite in media 3 is only 0.50C, in meida 2 is only 10C while in composite in media 1 without additional of water hyacinth fiber that release heat about 1.3oC. it shows that the product is suitable to use because composite with additional of water hyacinth can absorb heat and release less heat compared to composite without additional water hyacinth fiber so that the room become cooler.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73252519","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

Synthesis of Biodiesel From Rubber Seed Oil with Acid and Base Activated Natural Zeolite Catalyst 酸碱活化天然沸石催化剂催化橡胶籽油合成生物柴油

Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2019-07-12 DOI: 10.24114/ijcst.v2i2.14001

Tiamina Nasution, Akhir Mauludin Pulungan, Yuli Asih Wiliranti, J. Sihombing, A. Pulungan

引用次数: 2

Application of Humid Silica Plus Fertilizer with Various Combinations of Planting Media 湿润二氧化硅+肥料与不同种植介质组合的应用

Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2019-07-12 DOI: 10.24114/ijcst.v2i2.14000

Thomson A.S. Girsang, V. Apriyani, Desti S.N Pasaribu, Lisnawaty Simatupang

{"title":"Application of Humid Silica Plus Fertilizer with Various Combinations of Planting Media","authors":"Thomson A.S. Girsang, V. Apriyani, Desti S.N Pasaribu, Lisnawaty Simatupang","doi":"10.24114/ijcst.v2i2.14000","DOIUrl":"https://doi.org/10.24114/ijcst.v2i2.14000","url":null,"abstract":"Volcanic ash contains minerals needed by soil and plants with the highest composition of total elements, namely Ca, Na, K and Mg, other macro elements in the form of P and S, while micro elements consist of Fe, Mn, Zn, Cu. The layer of volcanic dust that has the potential to contain nutrients for soil fertilization for agriculture can actually only be used about 10 years after the spread of volcanic ash. Soil fertilization can be accelerated if mixed with organic materials such as by using chicken manure fertilizer which has nutrients from chicken manure: N = 1.7%, P2O5 = 1.9%, K2O = 1.5%. Humic acid helps regulate clay and soil improvement, binds and transfers micro elements from the soil to plants, increases water absorption, and stimulates the development of microorganisms in the soil. Therefore, this study was conducted to make humic silica fertilizer in the planting medium by utilizing volcanic ash in combination with chicken manure mixed with soil. In this study apart from being a source of humic acid, chicken manure is also beneficial because it contains microorganisms which will be useful in accelerating the fertilizer incubation process. The composition of the fertilizer mixture used in this study is: volcanic ash sinabung: chicken manure: soil = 20: 50: 30; 30: 50:20; 40: 50: 10. The mixture is stirred evenly and then incubated for 30 days. After 30 days, the nutrient content of these fertilizers was tested and the highest content of the nutrients obtained in the combination was 20:50:30 namely: Organic C-1.35%, N-total 0.2%, P-available 20.16 ppm , K-available 0.527 me / 100g, C / N 6.75%, and humic acid contained in 3.925%","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87770667","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

Combination of Sinabung Volcanic Ash and Humic Acid Against Characteristics of Humid Silica Fertilizers 锡纳朋火山灰与腐植酸复合对湿法二氧化硅肥料特性的影响

Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2019-07-12 DOI: 10.24114/ijcst.v2i2.13998

V. Apriyani, Thomson A.S. Girsang, Ribka J Sirait, Lisnawaty Simatupang

引用次数: 3

Red Spinach (Alternanthera amoena voss) as an Environmental Friendly Acid Base Indicator 红菠菜(Alternanthera amoena voss)作为环境友好的酸碱指示剂

Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2019-07-12 DOI: 10.24114/ijcst.v2i2.13997

Sri Adelila Sari, Suriati Nilmarito

引用次数: 5

Utilization of Glycerol from Used Oil as an Ester Glycerol Surfactant 废油中甘油用作酯甘油表面活性剂的研究

Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2019-07-12 DOI: 10.24114/ijcst.v2i2.13999

Dian Wardana, A. Ramadhan, Dinda Prihatini Fitri Amne, E. Eddiyanto

{"title":"Utilization of Glycerol from Used Oil as an Ester Glycerol Surfactant","authors":"Dian Wardana, A. Ramadhan, Dinda Prihatini Fitri Amne, E. Eddiyanto","doi":"10.24114/ijcst.v2i2.13999","DOIUrl":"https://doi.org/10.24114/ijcst.v2i2.13999","url":null,"abstract":"The development of biodiesel which is currently increasing has helped increase glycerol as a by-product. The glycerol can be obtained from a transesterification reaction in either vegetable or animal oils or fats and even used cooking oil. Glycerol buildup without further processing can reduce the selling price of glycerol. One solution to overcome this is to convert it to surfactants such as glycerol esters which are widely used in various industries such as chemistry, food, cosmetics, medicine and textiles. This study aims to utilize used cooking oil as a source of glycerol used in the synthesis of glycerol ester surfactants, as well as to compare the quality of glycerol ester surfactants produced by the use of commercial glycerol. The process begins by isolating glycerol from used cooking oil and then purifying it to improve its quality. Then glycerol ester was synthesized by using stearic acid, palmitic acid and oleic acid at reaction times of 120, 150 and 180 minutes. The highest yield of ester glycerol produced was at the reaction time of 180 minutes for each use of fatty acids. The test results showed that the glycerol ester produced was able to reduce the surface tension of the water. The value of hydrophylic-lipophylic balance (HLB) is not much different in the range of 5, and the use of various fatty acids and different sources of glycerol results in % of the stability of different emulsions.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83940356","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

Effect of Dragon Fruit Juice Addition on Changes in Peroxide Numbers and Acid Numbers of Used Cooking Oil 添加火龙果汁对废食用油过氧化氢和酸值变化的影响

Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2019-07-10 DOI: 10.24114/ijcst.v2i2.15449

Sri Adelila Sari, T. Putri, Muhammad Rudi Ar

引用次数: 4