Materials Literature
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Bacterial cell possess a cell wall, which is a main difference from mammalian cells. Its basic function is to provide the strength of bacteria, keeps its shape and provides an unusually high internal osmotic pressure. Synthesis of (construction) of bacterial cell wall occurs in at least three phases. All of these thre…
In this work the IIb-VI compound semiconductor ZnO is doped, via ion implantation of stable and radioactive isotopes, in order to investigate the chemical nature of exciton recombinations bound to previously unidentified\ndefects. Photoluminescence (PL) is discussed and is used extensively as the primary investigative…
Enterococcus faecalis is a gram positive bacterium which is commonly found in dental root canal endodontic failure. Neem leaf has several active substances such as flavonoids, tannins and sterols which act as an antibacterial. The purpose of this research is to determine the effect of neem leaf extract on the growth o…
Telah dilakukan penelitian sintesis serbuk larutan padat Zn 0,1 Mg 0,9 TiO 3 (ZMT01) menggunakan metode pencampuran larutan pada temperatur kalsinasi 550 C dengan variasi waktu penahanan. Bahan dasar yang digunakan dalam sintesis ini adalah serbuk Ti dan Mg, sedangkan serbuk Zn sebagai bahan aditif. Sintesis dilakukan…
This study pretends to quantify the effect of the process parameters in the anodizing of aluminum Al3003 and Al6063. For it, were made studies of the micro-hardness, roughness, thickness of layer and porosity of the anodized surface, using multifactorial analysis and robust design techniques. The following parameters…
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En este estudio se ha producido mediante la tecnica de electrospinning o electrohilado microfibras a partir de disoluciones de la mezcla del polimero polilactico (PLA), y de la polibiguanida (PHMB). El interes por obtener estas microfibras fue producir un scaffold (andamio temporal) medicado, esto ocurre porque las mi…
Bu çalışmada saf aluminyumun mekanik özelliklerine kalıntıların hacim oranları, bileşimleri, tane büyüklükleri ve dağılımlarının etkileri araştırılmıştır. Sıvı aluminyuma (-63+53)μm ve -45μm büyüklüklerinde silika (SiO2) ve alumina (Al2O3) taneleri %1 ve %5 hacim oranlarında katılmıştır. Döküm işlemi metal kalıplarda…
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This paper surveys the ESD characteristics of the PANI added PU/MWNT film according to the manufacturing conditions such as variation of the loading contents of PANI and the mixture ratio of 2 dispersion solutions. For this purpose, PANI added PU/MWNT ground films were made with IPA/MWNT 3wt% dispersion solution and P…
In recent years great efforts are being made for the design and fabrication of periodic nanostructures used in emerging nano-products, such as plasmonic lens, nano-grating and high density hard disk etc. In our previous research work, a deterministic fabrication approach to cost-effectively manufacturing nano gratings…
The European Union and Japan initiated the issue of RoHS, the directive about the \nrestriction of hazardous substances, which prohibits certain hazardous substances in electronic \nequipment - including lead - application. \nDue to the directive the use of lead free solder alloys is spreaded, however the Pb in the fo…
디올 성분으로 폴리(테트라메틸렌 글리콜)(PTMG)과 함께 말단에 히드록시에틸기를 갖는 폴리디메틸실록산(PDMS-OH)을 혼합하여 사용하면서, 이소시아네이트 화합물로 이소포론 디이소시아네이트를, 수분산성을 부여하기 위해 디메틸올 프로피온산을, 가교제로 트리메틸올프로판을, 사슬연장제로 부탄디올을 사용하여 실록산 성분을 포함하는 선형 및 가교형 수분산성 폴리우레탄(WPU-Si)을 합성하였다. PTMG와 PDMS-OH 혼합 비율을 달리하여 합성한 선형 및 가교형 WPU-Si 에멀젼의 안정성을 분석하였고, 이들을 필름으로 제조하여 표면 특성과 Tg, 인장 강신도 변화를 분…
Abstrak-Kebutuhan material paduan tahan temperatur tinggi semakin meningkat salah satunya pada industri pesawat terbang.Paduan intermetalik γ-TiAl dijadikan kandidat sebagai konstruksi aplikasi temperatur tinggi karena lebih ringan dan memiliki ketahanan pembakaran yang baik.Sintesa substrat dilakukan melalui proses m…
본 논문에서는 쇼트피닝 가공된 Alloy 600 재료의 고온환경하에서의 압축잔류응력 및 피로거동에 대해 연구하였다. 연구에 사용된 Alloy 600 재료는 원자력발전소에서 사용되는 주요부품 소재이며, 피닝가공으로 형성된 압축잔류응력은 응력부식균열(SCC; Stress Corrosion Cracking)의 발생을 크게 억제하는 것으로 알려져 있다. 현실성 있는 실험결과를 획득하기 위하여 실제 국내 원자력 발전소 주요부품의 사용온도를 포함한 고온 환경에서 피로특성 및 압축잔류응력을 평가하였다. 연구결과 약 538℃이하에서는 피닝가공 효과가 존재하는 것으로 파악되었다.…
El objetivo principal de la presente investigación ha sido desarrollar una nueva clase de materiales nanocompuestos orgánicos-inorgánicos basados en la capacidad de los copolímeros de bloque de auto-organizarse promoviendo la dispersión de nanopartículas, así como relacionar las diferentes morfologías obtenidas con la…
Divers facteurs influencent la qualité de l'eau des rivières.• Certains, comme l'occupation des sols, peuvent être modifiés par les activités humaines et notamment par l'aménagement du territoire.Agir sur les paysages pour améliorer la qualité de l'eau, une nouvelle approche pour un aménagement durable des territoires
En este artículo, dos aleaciones intermetálicas se prepararon con las composiciones nominales Al-Ni25 y Al-Ni24 (% at.) mediante la técnica de colada por gravedad y después fueron sometidas al proceso de molienda de bolas en húmedo. Estas aleaciones fueron estudiadas por difracción de rayos X (DRX), microscopía electr…
We report measurements of the temperature $T $ dependence of the linear polarization $\langle P\rangle $ of the thermal radiation emitted by thin, incandescent tungsten wires. We investigated an interval ranging from a little above room temperature up to melting, $T_m\approx 3700\,$K. These are the first measurements…
En este trabajo se analiza el comportamiento tribológico en términos de fricción y desgaste de las películas delgadas CrN/AlN depositadas sobre el acero H13 mediante plasma. Las películas se prepararon con pulverizado reactivo y mezcla convencional de gases Ar + N2, posteriormente añadiendo más gas reactivo a la mezcl…