Materials Literature
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利用3种实验方法，研究了SO2/Air／N2气氛对纯Mg及AZ91D合金熔体的保护行为，运用X射线衍射仪（XRD）、扫描电镜（SEM）、能谱仪（EDS）、Auger电子能谱仪（AES）和X射线光电子能谱仪（XPS）分析了形成的表面膜的相组成、微观组织形貌和生长过程，结合热力学计算讨论了表面膜的生长与保护机理，并考查了表面膜的稳定性．研究表明：在SO2／Air／N2气氛中，保护性表面膜由MgO，MgS和MgSO4混合组成，MgSO4是热力学稳定相，它的形成至关重要．当采用SO2/Air／N2气氛为保护气氛且SO2含量一定时，Air含量不能过高也不能过低．
The pyrolyzed carbon supported ferrum polypyrrole(Fe-N/C) catalysts are synthesized with or without selected dopants, p-toluenesulfonic acid(TsOH), by a facile thermal annealing approach at desired temperature for optimizing their activity for the oxygen reduction reaction(ORR) in O2-saturated 0.1 mol/L KOH solution.…
Ordered porous cabon with a 2-D hexagonal structure,high specific surface area and large pore volume was synthesized through a twostep heating method using tri-block copolymer as template and phenolic resin as carbon precursor.The results indicated the electrochemical performance of the sulfur/carbon composites prepar…
A single host white phosphor Ca3Y2- xSi3O12∶ xDy3 +excited by near UV light was synthesized by the high temperature solid-state method at 1 400 ℃. XRD analysis showed that the principal crystalline phase was Ca3Y2Si3O12. The results of fluorescence spectroscopy indicated that Ca3Y2- xSi3O12∶ xDy3 +silicate phosphors c…
3 ( V-601 ， dimethyl 2,2-azobis ( isobutyrate ))， CN ( V-65 ， 2,2-Azobis ( 2,4-diemthylvaleronitrile ))， COOH ( V-501 ， 4,4-azobis ( 4-cyanovaleric 酸))并且NH-( VA-061 ， 2,2-azobis [2-( 2-imidazolin-2-yl )丙烷])分别地。粒子尺寸，正式就职时间和聚合的动力学被扫描电子显微镜学(SEM ) 和 gravimetry 调查。聚合参数例如粒子尺寸，正式就职时间和聚合率，被开始者的功能的组更加影响，这被观察。而且，单体集中也在粒子形成起了重要作…
The article gives information modeling construction and production object by means BIM. The article discusses the essence of technology, it's features and benefits.
Το αντικείμενο της παρούσας έρευνας ήταν η μελέτη των παραγόντων που επηρεάζουν τη διάχυση του NaCl κατά την υγρή αλάτιση των τυριών. Μελετήθηκε η επίδραση της θερμοκρασίας του δις-απεσταγμένου νερού, της συγκέντρωσης σκόνης γάλακτος, της συγκέντρωσης πυτιάς, της συγκέντρωσης CaCl2 και του pH στην πορεία της αλάτισης…
Since the recognition of disease molecular basis,it has become clear that the keystone moments of medical practice,namely early diagnosis,appropriate therapeutic treatment and patient follow-up,must be approached at a molecular level.These objectives will be in the near future more effectively achievable thanks to the…
Enalapril Maleate is anti-hypertensive drug and its oral bioavailability is 40%. Sublingual tablets of Enalapril Maleate were prepared to improve its bioavailability, to avoid pre-systemic metabolism and hepatic first pass elimination. Tablets were prepared by wet granulation technique using two different superdisinte…
Cellulose samples are routinely analyzed by X-ray diffraction to determine their crystal type (polymorph) and crystallinity. However, the connection is seldom made between those efforts and the crystal structures of cellulose that have been proposed with synchrotron X-radiation and neutron diffraction over the past de…
Gold compounds form an attractive class of antiproliferative agents of potential use as anticancer agents. The molecular mechanisms through which gold compounds produce their biological effects are still largely unknown and the subject of intense investigations. Recent studies point out that the mechanism of action of…
In article the problem of subsequent plasma processing of metallization coating on the basis of iron received by method of arc metallization for the purpose of quality increasing is considered. The mathematical model of process is developed for the solution in MathCad 14 package. The received schedules of temperatures…
Background Ensuring reliable operation of equipment components and assemblies of main pipelines facilities is the main point of safe operation of hazardous production facilities. Furthermore, the pipeline operation is accompanied by erosion wear of the inner surface of the pipeline. Facilities, which are heavily expos…
We present detailed chemical abundance analyses of the oldest solar twin HIP 102152, with a derived age of 8.2 Gyr, and the younger 2.9 Gyr solar twin 18 Sco. We determined differential abundances of 21 elements relative to the Sun with precisions as high as 0.004 dex, using ultra high-resolution (R = 110,000), high S…
以带有活性基团的碘丁基硅油（IBu-PDMS）与氨基磺酸胍为原料,制备具有拒水阻燃双功能的碘丁基-N-磺酸氨基聚硅氧烷（IB-N-SA）PDMS。测定了（IB-N-SA）PDMS整理棉织物的接触角和拒水等级;通过氧指数、热重分析和棉织物燃烧后残炭的形貌,分析了其阻燃性能、热性能及阻燃机理。（IB-N-SA）PDMS可赋予棉织物拒水性能,接触角由88.37°提高到110.75°,拒水分值为90;整理棉织物燃烧后的残炭率由11.7%提高到33.6%,说明阻燃剂通过改变棉纤维的热裂解过程,促进了纤维的脱水炭化;整理棉织物的极限氧指数由18.0%提高至29.4%。
Nell’ambito del progetto europeo HERB (Holistic energy-efficient retrofitting of residential buildings) è in fase di realizzazione a Bologna la riqualificazione energetica di un edificio di Edilizia Residenziale Pubblica (ERP) di proprietà del Comune, costituito da 6 appartamenti su 3 piani con superficie totale ris…
Ziel der Arbeit war die Entwicklung von farbstoffmarkierten Polymeren, die einen temperaturgetriebenen Knäuel-Kollaps-Phasenübergang in wässriger Lösung ("thermo-responsive Polymere") zeigen und diesen in ein optisches Signal übersetzen können. Solche Polymere unterliegen innerhalb eines kleinen Temperaturintervalls e…
Tämän opinnäytetyön tavoitteena oli selvittää Ruukki Metalsin Raahen tehtaalla levyvalssaamon ja esikäsiteltyjen levytuotteiden osastojen tuotantoympäristössä polttoleikkauslaitteiden kunnossapitokäytäntö ja käytettävyys sekä tuotanto. Päätavoitteena oli selvittää polttotoiminnan nykytila, kustannusten alentamismahdol…
Particle board is a product of the utilization of waste wood processing that can be used in a variety of buildings and other constructions. Particle board products generally produce formaldehyde emissions that can harm human health. Reducing emissions of formaldehyde, environmentally friendly adhesive should be used,…
Co-oxides are promising water oxidation catalysts for artificial photosynthesis devices. Their catalytic mechanism was studied previously both experimentally and theoretically, but there is present ...