نتایج جستجو برای: ti si mixed oxides
تعداد نتایج: 345210 فیلتر نتایج به سال:
Multiple molecular forms of inhibitors of trypsin (TI) and chymotrypsin (CI), which are typical digestive enzymes of insects, mammals and micro-organisms, and subtilisin (SI), a proteinase of many bacteria and phytopathogenic fungi, were identified in seeds and vegetative organs of the majority of 128 wild and cultivated species representing 65 genera of three of the subfamilies of the Composit...
railway s heduling A omparative study Martin Aronsson1, Markus Bohlin1 and Per Kreuger1 Swedish Institute of Computer S ien e, Box 1263, SE-164 29 Kista, Sweden Martin.Aronsson si s.se, Markus.Bohlin si s.se, Per.Kreuger si s.se Abstra t This paper introdu es two Mixed Integer Linear Programming (MILP) models for railway tra planning using a umulative s heduling onstraint and asso iated prepro ...
In the Set Connectivity problem, we are given an n-node edge-weighted undirected graph and a collection of h set pairs (Si, Ti), where Si and Ti are subsets of nodes. The goal is to compute a min-cost subgraph H so that, for each set pair (Si, Ti), there exists at least one path in H between some node in Si and some node in Ti. In this paper, we initiate the study of the Survivable Set Connecti...
Binary oxides of Mg and Ti were prepared by the sol-gel technique in various Mg/Ti atomic ratios, r. Metastable phases, produced between 873 and 973 K from xerogels with Mg/Ti atomic ratios in the range ~1.1 < r ≤ 2, were studied by XRD and ND. XRD analysis showed crystal structures similar to that of Mg2TiO4 (qandilite), an inverse spinel of cubic structure. The composition range where this oc...
Introduction: Magmatic inclusions in Martian meteorites contain some hydrous minerals such as kaersutites [e.g., 1-2]. The characteristic of Martian kaersutites is their water-poor [3] and Ti-rich (~10 wt%) compositions. The presence of kaersutite gives evidence that Martian parent magma contained water. In fact, several attempts have been performed to estimate the water content in Martian magm...
There is evidence suggesting that exercise training (ET) acts as a factor toward resistance to Trypanosoma cruzi infection. However, the effects of mean arterial pressure (MAP), heart rate (HR), and nitric oxide (NO) during the acute phase of infection has not been elucidated yet. Swiss mice were randomly assigned into four groups: sedentary control (SC, n = 30), trained control (TC, n = 30), s...
After first investigations on the room temperature photoluminescence (PL) signal of porous Si [1,2], interest in the optical properties of semiconductor nanoparticles, especially porous Si and Si nanoparticles, has grown over the last decade [3,4]. Different processes for the synthesis of nanocrystalline Si (nc-Si) like Si ion implantation into high quality oxides [3], sputtering of Si-rich oxi...
High-temperature titanium alloys are widely used in aerospace hot parts; however, the thermal barrier temperature of 600 °C limits its service temperature. In this paper, a two-step hot-dip plating method is proposed to prepare composite coating containing Ce on surface alloy, which can make oxidation resistance alloy reach 800 The microstructure, phase composition, and element distribution Ce-...
Ternary compound Ti3SiC2 was successfully synthesized by pulse discharge sintering (PDS) for Ti/Si/TiC powder mixtures with different molar ratios, where coarse Ti powder ( 0:15mm) was used. When the molar ratio of Ti:Si:TiC was selected to be 2:2:3, the content of Ti3SiC2 reached 97.8% and density reached 99.0% after sintering at 1450 C for 20min under 50MPa load. The Ti-Si liquid reaction occ...
During its three flybys of Mercury, the MESSENGER spacecraft made the first detection of gamma-ray emission from the planet’s surface. With a closest approach distance of 200 km, the flybys provided an opportunity to measure elemental abundances of Mercury’s near-equatorial regions, which will not be visited at low altitude during MESSENGER’s orbital mission phase. Despite being limited by low ...
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