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Sui, M.,Pandey, P.,Kunwar, S.,Li, M.-Y.,Zhang, Q.,Lee, J. Elsevier 2016 Superlattices and microstructures Vol.100 No.-
<P><B>Abstract</B></P> <P>The morphological evolution of various Ag nanostructures on <I>c</I>-plane sapphire is systematically investigated through the solid-state-dewetting by the control of annealing temperature between 200 and 950 °C with the Ag films of 60 and 10 nm. Various configurations of Ag nanostructures including Ag voids, wiggly and round nanoparticles are fabricated with the 60 nm due to the annealing temperature dependent surface diffusion, surface energy minimization and Ag sublimation. As a sharp distinction, highly dense semi-spherical nanoparticles are fabricated with the 10 nm set throughout the temperature range due to a much higher dewetting degree induced by the enhanced surface diffusion with a much thinner film. The reflectance spectra shows a spectral shift along with the size variation, i.e. blue shift with the decreased size and vice versa. The reflectance and Raman spectra reveal a sharp distinction between the two sets along with the strong correlation to the nanostructure morphology.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Various configurations of self-assembled Ag nanostructures on c-plane sapphire. </LI> <LI> Single configuration Ag nanoparticles throughout the range with a thinner film. </LI> <LI> Detailed morphology study by SEM and AFM. </LI> <LI> Energy-dispersive X-ray spectroscopy confirmation of consistent sublimation above 650 °C. </LI> <LI> Reflectance and Raman of various configurations of Ag nanostructures. </LI> </UL> </P>
Influences of Principal Stress Rotation on the Deformation of Saturated Loess under Traffic Loading
Sui Wang,Zuliang Zhong,Xinrong Liu,Yiliang Tu 대한토목학회 2019 KSCE JOURNAL OF CIVIL ENGINEERING Vol.23 No.5
This study focuses on the undrained behavior of saturated remolded loess under long-term traffic loading in Lishi, China. In this work, a series of stress-controlled monotonic and cyclic hollow cylinder tests were conducted. In the monotonic tests, the samples were sheared under different inclinations of the major principal stress. According to the results, the saturated remolded loess clearly shows strength anisotropy and shear dilation features. In the cyclic tests, the experimental results show that the evolutions of the pore pressure and generalized shear strain are highly dependent on the principal stress rotation (PSR). The evolution of the strain can be categorized into stable and destructive types. For the stable type, the change in pore pressure increases with the number of loading cycles and then becomes stable. The change in the difference in pore pressure is approximately the same under the same vertical stress ratio. The development of pore pressure shows the hysteresis property, the PSR decreases the degree of the pore pressure hysteresis.
Sui Kiat Chang,Hiroshi Hamajima,Amin Ismail,Teruyoshi Yanagita,Norhaizan Mohd. Esa,Mohamad Taufik Hidayat Baharuldin 한국식품과학회 2014 Food Science and Biotechnology Vol.23 No.4
This study aimed to determine the lipid-loweringproperties, antioxidant capacity (AC) and angiotensin-Iconverting enzyme (ACE)-inhibitory activity of oil palmkernel protein hydrolysates (OPKHs) that were producedusing protease and pepsin-pancreatin hydrolysis. Theeffects of the OPKHs on apolipoprotein B (apoB) secretionwas assessed using HepG2 cells as a model and the AC ofthe OPKHs was determined based on ABTS radicalscavenging activity and ferric reducing antioxidant power(FRAP). Both protease and pepsin-pancreatin hydrolysatesreduced apoB secretion significantly (p<0.05). The OPKHsscavenged ABTS radicals effectively and demonstrated ahigh reducing power even at a low concentration (1 mg/mL). The AC of the OPKHs was significantly correlatedwith the OPKHs protein content. However, the OPKHsdemonstrated very low ACE-inhibitory activity. The pepsinpancreatinhydrolysate demonstrated significant lipidloweringproperties, favourable AC and ACE inhibitoryactivity in compared to protease hydrolysate. Therefore,OPKH demonstrate the potential as a nutraceutical forfunctional foods.
Sui, Shuang,Jiao, Zhen,Niyazi, Mayinuer,Sulaiya, Sulaiya,Lu, Ping,Qiao, You-Lin Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.10
We investigated the distribution of HPV genotypes in Uyghur women in Xinjiang region of China, and behavioral factors which could predispose them to HPV infection. In this cross-sectional study, women aged 15-59 years were recruited by cluster sampling method in Yutian region in 2009. Liquid-based cytology samples were analyzed centrally for HPV genotype with a linear array detector. Univariate and multivariate logistic regression analyses were performed to identify behavioral risk factors for HPV infection. A total of 883 Uyghur women were recruited successfully. The prevalence of high-risk HPV and low-risk HPV were 7.25% and 1.58%, respectively; the most common HPVs were HPV16, 51, 31, 39 and 58. We found that age of first sexual intercourse was a strong predictor for HPV infection (odds ratio of 4.01 for ${\leq}15$ years versus ${\geq}25$). Having sexual partners ${\geq}3$ was the second predictor (OR 3.69, 95% CI 2.24-7.16). Cleaning the vagina after sex showed an increased risk of HPV infection (OR 2.72; 95% CI 1.98-5.13); Using the condom showed protective factors for HPV infection (OR 0.36; 95%CI0.12-0.53). HPV16, 51, 31, 39 and 58 were the priority types; the age of first sexual intercourse was identified as a major risk factor for HPV infection. Other notable risks were number of sexual partners and cleaning the vagina after sex. Changing these behavioral risk factors could help to reduce the occurrence of cervical cancer in this population.
Mini droplets to super droplets: evolution of self-assembled Au droplets on GaAs(111)B and (110)
Sui, Mao,Li, Ming-Yu,Kim, Eun-Soo,Lee, Jihoon International Union of Crystallography 2014 Journal of applied crystallography Vol.47 No.2
<P>In this article, the effect of deposition amount on self-assembled Au droplets fabricated on GaAs(111)B and (110) is presented. The investigation is systematically performed by the variation of the Au deposition amount from 2 to 20 nm while fixing the other growth parameters such as annealing temperature and duration to clearly observe the effect. Under identical growth conditions, the self-assembled Au droplets show significantly different size and density depending on the amount of Au deposition:<I>i.e.</I>the average height varies by 436% from 21.8 to 95.5 nm and the average diameter swings by 827% from 52 to 430 nm, showing that the size increase is dominated by the lateral expansion. Meanwhile the average density varies by over two orders of magnitude from 1.24 × 10<SUP>8</SUP>to 4.48 × 10<SUP>10</SUP> cm<SUP>−2</SUP>on GaAs(111)B. With relatively low Au deposition amounts, below 3 nm, round dome-shaped mini Au droplets with high packing density can be fabricated, while super large Au droplets result with higher deposition amounts, above 10 nm, with a density two orders of magnitude lower. It is also found that the surface index has a minor effect on the fabrication of self-assembled Au droplets with the variation of deposition amount. The results are systematically analyzed and discussed in terms of atomic force microscopy and scanning electron microscopy images, line profiles, power spectrums, r.m.s. surface roughness, and size and density plots.</P>
Giant enhancement of the intrinsic spin Hall conductivity in β -tungsten via substitutional doping
Sui, Xuelei,Wang, Chong,Kim, Jinwoong,Wang, Jianfeng,Rhim, S. H.,Duan, Wenhui,Kioussis, Nicholas American Physical Society 2017 Physical Review B Vol.96 No.24
<P>A key challenge in manipulating the magnetization in heavy-metal/ferromagnetic bilayers via the spin-orbit torque is to identify materials that exhibit an efficient charge-to-spin current conversion. Ab initio electronic structure calculations reveal that the intrinsic spin Hall conductivity (SHC) for pristine beta-W is about 60% larger than that of alpha-W. More importantly, we demonstrate that the SHC of beta-W can be enhanced via Ta alloying. This is corroborated by spin Berry curvature calculations of W1-x Ta-x (x similar to 12.5%) alloys which show a giant enhancement of the spin Hall angle of up to approximate to-0.5. The underlying mechanism is the synergistic behavior of the SHC and longitudinal conductivity with the Fermi level position. These findings not only pave the way for enhancing the intrinsic spin Hall effect in beta-W, but also provide guidelines to exploit substitutional alloying to tailor the spin Hall effect in various materials.</P>
Temperature-Dependent Structural and Transport Properties of Liquid Transition Metals
Sui Yang,Xuping Su,Jianhua Wang,Nai-Yong Tang 대한금속·재료학회 2010 METALS AND MATERIALS International Vol.16 No.6
The evolution of the atomic structures and diffusivity of liquid transition metals with increasing temperature has been studied here using molecular dynamics. An analysis of Honeycutt and Andersen (HA) Indices indicates that relatively low order atomic clusters of rhombohedra-related structures increase with an increase in temperature. The results illustrate that the distortion in the local structural order with a predominant rhombohedra character enhances the diffusivity in liquid metals. The excess entropy approximated by the two-body contribution increases with the distortion of the local structural order traced by the HA Indices. The relationship between the excess entropy and the reduced diffusion coefficient supports the universal scaling law proposed by M. Dzugutov. The calculated diffusivities were compared with predictions of four diffusion models. The temperature dependence of the diffusivity cannot be described by the Arrhenius Law, the moving oscillator model or the free volume model but rather by the density fluctuation model with the square proportionality of temperature.