Procedia Chemistry最新文献_第2页

Preparation and Characterization of Treated MWCNT-Muscovite Filled Epoxy Nanocomposites mwcnt -白云母填充环氧纳米复合材料的制备与表征

Procedia Chemistry Pub Date : 2016-01-01 Epub Date: 2016-03-24 DOI: 10.1016/j.proche.2016.03.009

Nur Suraya Anis Ahmad Bakhtiar , Yeap Cheok Kuang , Siti Shuhadah Md. Saleh , Hazizan Md Akil

引用次数: 3

Preparation and Characterization of Microwave-absorption of Sarulla North Sumatra Zeolite and Ferric Oxide-filled Polyurethane Nanocomposites 北苏门答腊沸石与氧化铁填充聚氨酯纳米复合材料的制备及微波吸收特性研究

Procedia Chemistry Pub Date : 2016-01-01 Epub Date: 2016-03-24 DOI: 10.1016/j.proche.2016.03.036

Golfrid Gultom , Basuki Wirjosentono , Kerista Sebayang , Masno Ginting

{"title":"Preparation and Characterization of Microwave-absorption of Sarulla North Sumatra Zeolite and Ferric Oxide-filled Polyurethane Nanocomposites","authors":"Golfrid Gultom , Basuki Wirjosentono , Kerista Sebayang , Masno Ginting","doi":"10.1016/j.proche.2016.03.036","DOIUrl":"10.1016/j.proche.2016.03.036","url":null,"abstract":"<div><p>Microwave-absorptive polymeric composite materials are becoming important to protect interference of any communication systems due to the increase in the use of microwave-inducing devices. In this work, the microwave-absorptive polyurethane composites are prepared using natural zeolites of Sarulla North Sumatra and commercial ferric-oxide as fillers. Weight ratio of the natural zeolite to ferric oxide were varied (18:2; 16:4; 14:6; 12:8 and 10:10) by weight. The fillers are prepared using ball milling technique and characterized using Particle Size Analyzer for particle size distribution. The nanocomposites, prepared using in-situ reaction of polyethylene glycol and toluene diisocyanate, is characterized for physical and mechanical properties using tensile strength, thermal properties with TGA techniques, as well as morphological and chemical properties using scanning electron microscopy. Composition and loading of the nanofillers against polyurethane matrices is 20% by weight. Microwave-absorption properties of the nanocomposites is characterized using 8-12GHz frequency. Tensile strengths of the natural zeolite-ferric oxides polyurethane nanocomposites shows higher values when matrices filled with lower ferric-oxide, which could be due to the nanozeolites have functioned as reinforcement for the polyurethane matrix through polar-polar interaction between the filler surfaces with the matrices. The microwave absorption properties, which investigated by Vector Network Analyzer, of the nanocomposites filled in polyurethane with the ratio of nanozeolite to ferric oxide filler of 12:8 shows reflection loss of – 13.2dB. This condition was observed at 11.1GHz.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":"19 ","pages":"Pages 441-446"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.036","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81056022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Application of Cassava Peel and Waste as Raw Materials for Xylooligosaccharide Production Using Endoxylanase from Bacillus subtilis of Soil Termite Abdomen 利用土壤白蚁腹部枯草芽孢杆菌内生聚糖酶生产低聚木糖的研究

Procedia Chemistry Pub Date : 2016-01-01 Epub Date: 2016-02-11 DOI: 10.1016/j.proche.2016.01.007

Anak Agung Istri Ratnadewi , Agung Budi Santoso , Erma Sulistyaningsih , Wuryanti Handayani

{"title":"Application of Cassava Peel and Waste as Raw Materials for Xylooligosaccharide Production Using Endoxylanase from Bacillus subtilis of Soil Termite Abdomen","authors":"Anak Agung Istri Ratnadewi , Agung Budi Santoso , Erma Sulistyaningsih , Wuryanti Handayani","doi":"10.1016/j.proche.2016.01.007","DOIUrl":"10.1016/j.proche.2016.01.007","url":null,"abstract":"<div><p>Xylooligosaccharides (XOS) are the sugars produced from xylan hydrolysis. XOS have a prebiotic characteristic by promoting the growth of probiotic microorganisms. Xylan containing agriculture wastes <em>e.g.</em> rice straw, sugarcane bagasse, corncobs, cassava peel and waste can be used to produce XOS by a consecutive process of alkali-pretreatment and enzymatic hydrolysis. In this study, we focused on enzymatic production of XOS from cassava peel and waste, which is a low cost material with a relatively high xylan content. The dried cassava peel and waste were ground and sieved to be <100 mesh size, and were then subjected to pretreatment with 0.5% (w/v) sodium hypochlorite solution for 5h to remove the lignin in the sample. In the next stage, the xylan was extracted by soaking in 10% sodium hydroxide (NaOH) for 24h, followed by adjusting the pH to pH 7 by adding 5% (w/v) hydrochloric acid (HCl). Next, after centrifugation, the obtained filtrate was precipitated with ethanol (ratio 1:3) and dried at 80°C for 48h. The NaOH pretreatment enabled almost 4.83% and 6.23% recovery of the xylan that was present in the cassava peel and waste. Next, the xylan from cassava peel and waste was hydrolyzed using endoxylanase (2.21 U/mL) from <em>Bacillus subtilis</em> of soil termite abdomen at pH 5 and 50°C for 15h. Analysis by TLC showed the production of XOS, with especially X5 as the major band. HPLC chromatography confirmed that the most abundant product was indeed X5. X3 and X4 were also found but no X2. The results were not so different from the hydrolysis of xylan from oat spelt xylan, but showed a relatively lower yield.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":"18 ","pages":"Pages 31-38"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.01.007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80703070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Fabrication of a Nitrate Selective Electrode for Determination of Nitrate in Fertilizers by Using Flow Injection Analysis System 流动注射分析系统测定肥料中硝酸盐选择电极的制备

Procedia Chemistry Pub Date : 2016-01-01 Epub Date: 2016-08-12 DOI: 10.1016/j.proche.2016.07.011

Sumonmarn Chaneam , Waritta Taweetong , Kampanart Kaewyai , Pheeraphon Thienwong , Aekgaraj Takaew , Rasamee Chaisuksant

引用次数: 5

Bioflotation: Bacteria-Mineral Interaction for Eco-friendly and Sustainable Mineral Processing 生物浮选:细菌-矿物相互作用，实现生态友好和可持续的矿物加工☆

Procedia Chemistry Pub Date : 2016-01-01 Epub Date: 2016-03-24 DOI: 10.1016/j.proche.2016.03.068

Edy Sanwani , SitiKhodijah Chaerun , RiriaZendy Mirahati , Tri Wahyuningsih

{"title":"Bioflotation: Bacteria-Mineral Interaction for Eco-friendly and Sustainable Mineral Processing","authors":"Edy Sanwani , SitiKhodijah Chaerun , RiriaZendy Mirahati , Tri Wahyuningsih","doi":"10.1016/j.proche.2016.03.068","DOIUrl":"10.1016/j.proche.2016.03.068","url":null,"abstract":"<div><p>In the current study, the action of two bacteria capable of producing biosurfactants and oxidizing iron (Fe) and sulfur (S), namely <em>Bacillus pumilus</em> SKC-2 and <em>Alicyclobacillus ferrooxydans</em> SKC/SAA-2, was investigated with respect to their ability in possessing dual-function as either bio-collector or depressant for the development of sulfide bioflotation processes. Both bacterial strains were able to produce high amounts of biosurfactants interacted with pyrite that had an important role in their adhesion on the surface of pyrite as well as the change of pyrite surface properties. Over the course of the experiments, the pH of the solutions gradually decreased to ∼3, indicating the active oxidation of pyrite minerals by bacteria. The growth of both bacterial strains resulted in the generation of biosurfactants as represented by the decrease of the surface tension of the solutions and the increase of the contact angle of the pyrite surfaces as a function of time. However, the contact angle of pyrite surfaces gradually decreased after 5 days of incubation until the experiments terminated on 30 days. Scanning electron microscopy equipped with energy dispersive X-ray spectroscopy (SEM-EDS) and Fourier transform Infrared (FTIR) analyses also confirmed the role of both bacterial strains in changing the pyrite surface properties to be more hydrophobic or more hydrophilic depending on the time of incubation. These results indicate that the changes of pyrite surface properties are clearly as the results of bacterial action, likely serving as both bio-collector or bio-frother and depressant that would be very applicable for flotation processes. These results increase our knowledge on the interactions in pyrite-bacteria complexes and could potentially be a very useful result with real exploitable value for those working on sulfide bioflotation processes.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":"19 ","pages":"Pages 666-672"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91089619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 28

Thin Film ZnO Coated on FTO/TiO2 as an Anti Reflection Coatingfor EnhancingVisible Light Harversting in Dye Sensitized Solar Cells System 在FTO/TiO2上涂覆ZnO薄膜增强染料敏化太阳能电池系统可见光收集的抗反射涂层

Procedia Chemistry Pub Date : 2016-01-01 Epub Date: 2016-03-24 DOI: 10.1016/j.proche.2016.03.063

Sayekti Wahyuningsih , Ganjar Fadillah , Rahmat Hidayat , Ari Handono Ramelan

{"title":"Thin Film ZnO Coated on FTO/TiO2 as an Anti Reflection Coatingfor EnhancingVisible Light Harversting in Dye Sensitized Solar Cells System","authors":"Sayekti Wahyuningsih , Ganjar Fadillah , Rahmat Hidayat , Ari Handono Ramelan","doi":"10.1016/j.proche.2016.03.063","DOIUrl":"10.1016/j.proche.2016.03.063","url":null,"abstract":"<div><p>ZnOmaterial has unique electrical and optical properties that many important applications, including as an anti-reflection coating in dye sensitized solar cells. Flat anti-reflective coatings (ARC) made of ZnO on top to improve the optical properties of the coating. In this study, ZnO nanoparticle were coated with TiO<sub>2</sub> nanolayers by a simple wet chemical route. TiO<sub>2</sub> nanorods coated ZnO nanoparticle was synthesized by two step i.e. (1) base hydrolysis and polymerization of TiO<sub>2</sub> (2) ZnO nanoparticle were coated with a TiO<sub>2</sub> layer. The TiO<sub>2</sub> coated ZnO prepared was characterized by X-ray diffraction (XRD), Reflectance spectroscopy, SEM and TEM. ZnO annealed at a temperature of 400<sup>o</sup>C have the greatest crystal size than annealedat a temperature of 500°C and 600°C. While, the Reflectance (%R)properties shows that the higher annealing temperature of ZnO preparations, the higher of %R value of ZnO thin layer. The ZnO prepared by annealed at 400<sup>o</sup>Cgain a good performance of the lowest reflectance value. The difference properties are due to differences of light scattering resulting from the crystal size effect. The crystals size that have a good performance as an anti-reflection is around 20nm, result study of ZnOannealed at 400°C. TEM nanograph shows that the synthesized ZnO have spherical morphology. The optimum performance ofDSSCs was conducted using the photoanode ZnO-coated TiO<sub>2</sub>at present 10%APTMS as surface modifier anchor dye group. Bythe addition of ARC we have been capable improve cell performance so that cells achieve an efficiency of 1.13%.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":"19 ","pages":"Pages 632-637"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.063","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74848114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

High Responsivity IR Photodetector Based on CuO Nanorod Arrays/AAO Assembly 基于CuO纳米棒阵列/AAO组件的高响应红外探测器

Procedia Chemistry Pub Date : 2016-01-01 Epub Date: 2016-03-24 DOI: 10.1016/j.proche.2016.03.016

Khaled M. Chahrour , Naser M. Ahmed , M.R. Hashim , Ahmad M. Al-Diabat

引用次数: 10

Elimination of SCMV (Sugarcane Mozaik Virus) and Rapid Propagation of Virus-free Sugarcane (Saccharum officinarum L.) Using Somatic Embryogenesis 甘蔗莫扎克病毒(SCMV)的消灭及脱毒甘蔗的快速繁殖利用体细胞胚胎发生

Procedia Chemistry Pub Date : 2016-01-01 Epub Date: 2016-02-11 DOI: 10.1016/j.proche.2016.01.016

Parawita Dewanti , Laily Ilman Widuri , Choirul Ainiyati , Purnama Okviandari , Maisaro , Bambang Sugiharto

{"title":"Elimination of SCMV (Sugarcane Mozaik Virus) and Rapid Propagation of Virus-free Sugarcane (Saccharum officinarum L.) Using Somatic Embryogenesis","authors":"Parawita Dewanti , Laily Ilman Widuri , Choirul Ainiyati , Purnama Okviandari , Maisaro , Bambang Sugiharto","doi":"10.1016/j.proche.2016.01.016","DOIUrl":"10.1016/j.proche.2016.01.016","url":null,"abstract":"<div><p>The use of apical buds and in-vitro shoot for elimination of SCMV and shoot proliferation in sugarcane was assessed. The purpose of this research was to determine the level of virus elimination and to obtain virus-free sugarcane. Research were using explants of apical buds and in vitro shoots of sugarcane PS-881 cultured on MS medium supplemented with antiviral acyclovir and ribavirin consisted of 0, 20 and 40mg l<sup>-1</sup> with incubation duration 4, 5 and 6 weeks. Elimination of virus-free plantlets was detected by DAS-ELISA and RT-PCR. The results showed that the detection of RT-PCR using apical explants treated with acyclovir 40mg l<sup>-1</sup> for 6 weeks was not effective to eliminate SCMV, while the use of in vitro shoot explants treated with 40mg l<sup>-1</sup> of acyclovir or 40mg l<sup>-1</sup> ribavirin eliminated the SCMV for about 100% resulting virus-free sugarcane plantlets. Sugarcane virus-free propagated through somatic embryogenesis on five different induction mediums. Callus induction and proliferation through somatic embryogenesis were obtained on MS nutrient medium with the addition of 3mg l<sup>-1</sup> 2,4-D + 1.5mg l<sup>-1</sup> BAP. The result of regeneration produced ± 11 virus-free plantlets within 8 weeks.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":"18 ","pages":"Pages 96-102"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.01.016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88201640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Recombinant LipL32 Protein for Leptospirosis Detection in Indonesia 重组LipL32蛋白检测印尼钩端螺旋体病

Procedia Chemistry Pub Date : 2016-01-01 Epub Date: 2016-02-11 DOI: 10.1016/j.proche.2016.01.004

Sumarningsih, Simson Tarigan, Susanti, Kusmiyati

引用次数: 8

The Effect of 3-aminopropyltrimethyoxysilane (AMEO) as a Coupling Agent on Curing and Mechanical Properties of Natural Rubber/Palm Kernel Shell Powder Composites 偶联剂3-氨基丙基三甲基氧基硅烷(AMEO)对天然橡胶/棕榈仁壳粉复合材料固化及力学性能的影响

Procedia Chemistry Pub Date : 2016-01-01 Epub Date: 2016-03-24 DOI: 10.1016/j.proche.2016.03.019

Shuhairiah Daud, Hanafi Ismail, Azhar Abu Bakar

{"title":"The Effect of 3-aminopropyltrimethyoxysilane (AMEO) as a Coupling Agent on Curing and Mechanical Properties of Natural Rubber/Palm Kernel Shell Powder Composites","authors":"Shuhairiah Daud, Hanafi Ismail, Azhar Abu Bakar","doi":"10.1016/j.proche.2016.03.019","DOIUrl":"10.1016/j.proche.2016.03.019","url":null,"abstract":"<div><p>This research is conducted using palm kernel shell powder (PKS) as filler in natural rubber The effect of 3-aminopropyltrimethoxysilane as coupling agent on composites were studied at different palm kernel shell loading i.e, 0 5, 10, 15 and 20 phr The palm kernel shell was crushed and sieved to an average particle size of 5.53μm The palm kernel shell filled natural rubber composites were prepared using laboratory size two roll mill The curing characteristics such as scorch time, cure time and maximum torque were obtained from rheometer The palm kernel shell powder filled natural rubber composites were cured at 150<sup>o</sup>C using hot press according to their cure time Curing characteristics, tensile properties, rubber-filler interaction and morphological properties of palm kernel shell powder filled natural rubber were studied Scorch time and cure time show reduction but tensile strength, elongation at break, modulus at 100% (M100) and modulus at 300% (M300) increased with the presence of 3-aminopropyltrimethyloxysilane Rubber-filler interaction studies showed that rubber filler interaction in natural rubber filled with palm kernel shell powder improved with incorporation of 3-aminopropyltrimethyoxysilane.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":"19 ","pages":"Pages 327-334"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88399514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13