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B12N12 Nano-cage as Potential Sensor for NO2 Detection 被引量:4
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作者 Javad Beheshtian Mohammad Kamfiroozi +1 位作者 Zargham Bagheri AliAhmadi Peyghan 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2012年第1期60-64,I0003,共6页
The NO2 molecule adsorption on B12N12 nano-cage was investigated using density functional theory calculations in terms of adsorption energy, HOMO/LUMO energy gap (Eg) changes, charge transfer, structural deformation... The NO2 molecule adsorption on B12N12 nano-cage was investigated using density functional theory calculations in terms of adsorption energy, HOMO/LUMO energy gap (Eg) changes, charge transfer, structural deformation, etc. Furthermore, some aspects of stability and properties of B12N12 including calculation of binding electronic and Gibbs free energies, density of states, and molecular electrostatic potential surfaces are investigated. Three possible configurations for NO2 adsorption on the B12N12 nano-cage are energetically found. Interestingly, the results reveals that the Eg of B12N12 cluster is very sensitive to the pres- ence of NO2 molecules as its value reduces from 6.84 eV in free cluster to 3.23 eV in the most stable configuration of NO2/cluster complex. This phenomenon dramatically increases the electrical conductivity of the cluster, suggesting that the B12N12 nano-cluster may be potential sensor for NO2 gaseous molecule detection. 展开更多
关键词 Nitrogen dioxide Boron nitride nanocluster Density functional theory ADSORPTION B12N12
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双眼屈光不正性弱视和远视的相关性研究(英文) 被引量:4
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作者 Ali Rezaei Shokooh Farhad Adhami Moqadam +2 位作者 Abdolhamid Najafi Youness Ghasemiy Mahnaz Vaezi MSc 《国际眼科杂志》 CAS 2012年第3期391-393,共3页
目的:探讨在远视、眼正位儿童中双眼屈光不正性弱视与远视患病率的关系。方法:选取56例两眼对称远视儿童,平均年龄5.5岁,分为两组,双眼远视≤+4.0D等效球镜组和双眼远视>+4.0D等效球镜组。评估两组双眼屈光不正性弱视的患病率,并进... 目的:探讨在远视、眼正位儿童中双眼屈光不正性弱视与远视患病率的关系。方法:选取56例两眼对称远视儿童,平均年龄5.5岁,分为两组,双眼远视≤+4.0D等效球镜组和双眼远视>+4.0D等效球镜组。评估两组双眼屈光不正性弱视的患病率,并进行比较。结果:在32例双眼远视≤+4.0D等效球镜组中,4例(13%)患双眼屈光不正性弱视;24例双眼远视>+4.0D等效球镜组中,15例(63%)患双眼屈光不正性弱视。统计学分析显示两组双眼屈光不正的儿童中弱视患病率有显著性差异(P<0.01)。结论:双眼屈光不正性弱视在双眼远视的儿童中并不罕见,尤其是当远视度数大于+4.0D等效球镜时。基于本次调查,双眼远视>+4.0D的儿童有13%~63%发展成两眼屈光不正性弱视。由此说明远视>+4.0D的儿童患两眼屈光不正性弱视的几率较大。 展开更多
关键词 双眼屈光不正性弱视 屈光不正性弱视 双眼远视 弱视
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碳纳米管-二氧化钛纳米复合材料的合成及纳米流体驱油实验 被引量:2
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作者 DIBAJI A S RASHIDI A +1 位作者 BANIYAGHOOB S SHAHRABADI A 《石油勘探与开发》 SCIE EI CAS CSCD 北大核心 2022年第6期1234-1241,共8页
为了同时利用(类)金属氧化物和碳纳米材料在提高采收率方面的作用,合成了碳纳米管-二氧化钛(CNT-TiO_(2))纳米复合材料,用接触角、界面张力和乳液稳定性等评价其性能,通过玻璃刻蚀模型驱油实验评估CNT-TiO_(2)纳米流体驱油效果。合成的C... 为了同时利用(类)金属氧化物和碳纳米材料在提高采收率方面的作用,合成了碳纳米管-二氧化钛(CNT-TiO_(2))纳米复合材料,用接触角、界面张力和乳液稳定性等评价其性能,通过玻璃刻蚀模型驱油实验评估CNT-TiO_(2)纳米流体驱油效果。合成的CNT-TiO_(2)纳米复合材料由二氧化钛基体和碳纳米管增强相组成,二氧化钛为主要的结晶相,二氧化钛纳米颗粒覆盖在碳纳米管上。CNT-TiO_(2)能够将岩石的润湿性从油湿变为水湿,并降低油水界面张力。CNT-TiO_(2)可提高Pickering乳液的稳定性,在90℃条件下形成的乳液仍能保持稳定;NaCl质量分数高达2%时,配制的乳液在静置7 d后仍保持稳定。驱油实验结果显示,CNT-TiO_(2)纳米流体提高采收率效果较好。 展开更多
关键词 碳纳米管 二氧化钛 纳米复合材料 纳米流体 Pickering乳液 提高采收率
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DFT Study on Thermodynamic Parameters of CO2 Absorption into Aqueous Solution of Aliphatic Amines 被引量:1
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作者 Monireh Hajmalek Hossein Aghaie +1 位作者 Karim Zare Mehran Aghaie 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2014年第6期672-678,I0003,共8页
Using density functional theory (DFT), the thermodynamic parameters of the CO2 absorp-tion into the aqueous solution of the aliphatic amines including some alkylamines, alka-nolamines, diamines and a type of aminoam... Using density functional theory (DFT), the thermodynamic parameters of the CO2 absorp-tion into the aqueous solution of the aliphatic amines including some alkylamines, alka-nolamines, diamines and a type of aminoamide were calculated. The geometry optimiza-tion and the calculation of vibrational frequencies in the gas phase were performed at the B3LYP/6-311+ G(d,p) level of theory. Moreover, the standard solvation free energies of the studied species were computed upon the solution phase optimized geometries through the latest continuum solvation model (SMD/IEF-PCM) at the HF/6-31G(d) level of theory. With this approach, two important properties of the CO2 absorption into the aqueous so-lutions of the studied amines were evaluated: the acid dissociation constant (pKa) of the parent amines and the standard enthalpy change (ΔH^φabs) related to the CO2 absorption process. A roughly linear relationship was observed between pKa and ΔH^φabs. This finding suggests that a raise in the basicity of an amine leads to an increase in the heat released in CO2 absorption and consequently in the required energy for the regeneration of amine. 展开更多
关键词 Density functional theory AMINE CO2 absorption Heat of absorption SMD solvation model
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First Principles Study of Half-metallic Properties at MnSb/GaSb(001) Interface 被引量:1
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作者 Elmira Sartipi Alireza Hojabri +1 位作者 Arash Bouchani Mohammad Homayion Shakib 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2011年第2期155-161,I0003,共8页
Density functional theory calculations are performed to study the structural, electronic and magnetic properties of hexagonal NiAs type and cubic zinc blende type MnSb structure and interface of zinc blende MnSb with ... Density functional theory calculations are performed to study the structural, electronic and magnetic properties of hexagonal NiAs type and cubic zinc blende type MnSb structure and interface of zinc blende MnSb with GaSb(001). We used generalized gradiant approximation to calculate the exchange-correlation term in bulk and interface determination. The zinc blende structure of MnSb is found to be ferromagnetic half-metal with a total moment of 4 μB per formula unit. Results show that the half-metallicity character is preserved at MnSb/GaSb(001) interface. The magnetic moment of Mn atom in interface is reduced and the magnetic moment of the interface Sb atom is equal to the average of the corresponding bulk values in two sides of the interface. The band alignment properties are also computed and a rather large minority valance band offset of about 1.25 eV is obtained in this heterojunction. 展开更多
关键词 SPINTRONIC Surface INTERFACE Density functional theory
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春季角结膜炎患者其他过敏症的患病率(英文) 被引量:1
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作者 Ali Rezaei Shokooh Reza Zarei Abianeh 《国际眼科杂志》 CAS 2010年第4期621-622,共2页
目的:测定春季角结膜炎患者和一级亲属中相对其他过敏的患病率。方法:本前瞻性研究自1999-04/2008-03 9a间在520名春季角结膜炎的患者中进行。所有的年龄、性别、春季角结膜炎类型、其他伴随患者和/或其亲属的超敏反应的各种类别的信... 目的:测定春季角结膜炎患者和一级亲属中相对其他过敏的患病率。方法:本前瞻性研究自1999-04/2008-03 9a间在520名春季角结膜炎的患者中进行。所有的年龄、性别、春季角结膜炎类型、其他伴随患者和/或其亲属的超敏反应的各种类别的信息记录在问卷调查表并用统计学分析。结果:520名患者中,男369例(71.0%),女151例(29.0%)。患者的平均年龄为15.3岁(6 -30岁)。242例(46.5%)曾在自己或其一级亲属中有春季角结膜炎或其他类型超敏反应的历史。在这些阳性病史病例中,68例(28.1%)有过敏性皮炎,51例(21.1%)(其亲属)春季结膜炎,46例(19.0%)哮喘,29例(12.0%)过敏性鼻窦炎,24例(10.0%)药物过敏,14例(5.8%)特应性皮炎,6例(2.5%)过敏性鼻炎,4例(1.6%)有花粉热的历史。结论:不少春季角结膜炎患者和/或其亲属有其他由IgE介导的过敏或其他类型。哮喘、药物引起的过敏和其他过敏在这些患者中普遍。患者的亲属中春季角结膜炎比率高,因此它可能是由于疾病的遗传起源。 展开更多
关键词 春季角结膜炎 过敏 过敏症 结膜炎
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Electronic Response of Nano-sized Cages of ZnO and MgO to Presence of Nitric Oxide
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作者 Ali Ahmadi Peyghan Maziar Noei 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2013年第2期231-236,I0004,共7页
We have performed a comparative theoretical study on the adsorption of nitric oxide (NO) on Zn12012 and Mgt2012 nanocages in terms of their energetic, geometric, and electronic properties. It has been found that NO ... We have performed a comparative theoretical study on the adsorption of nitric oxide (NO) on Zn12012 and Mgt2012 nanocages in terms of their energetic, geometric, and electronic properties. It has been found that NO adsorption on the MgO nanocage is energetically more favorable than that on the ZnO one. In contrast to the ZnO nanocage, HOMO-LUMO energy gap (Eg) of MgO one is dramatically decreased in the presence of NO molecule so that it is transformed from an intrinsic semiconductor (Eg≈5.00 eV) to a p-type one (Eg≈1.93 eV). We have predicted that electronic and conductance properties of the Mg12012 nanocage are sensitive toward NO molecule, thus it may be potential candidate in detection of NO molecules. 展开更多
关键词 Sensor Electronic property Density functional theory Fullerene-like cluster Nitrogen monoxide
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Stress as a Suprasegmental Phonological Shift in Translation: A New Category of Linguistic Shifts
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作者 Amin KARIMNIA Esmaeil KALANTARI 《Chinese Journal of Applied Linguistics》 2018年第2期218-235,258,共19页
This study relies on a contrastive analysis to underscore the functions of stress as a shift in translation, especially when phonological specifications can have an impact on translation. In the original model of tran... This study relies on a contrastive analysis to underscore the functions of stress as a shift in translation, especially when phonological specifications can have an impact on translation. In the original model of translation shifts proposed by Catford, only segmental linguistic elements are taken into consideration, while the model totally ignores stress as a supra-segmental linguistic element. Including stress within the analytic procedures of the model can bring about a new type of shift. This implies that Catford's categorization of shifts must be developed in order to increase its applicability, especially when phonological specifications in the source text can have an impact on grammar and lexical items in the target text. As a result of the inclusion of stress into Catford's original mode, a revised version of the translation shift model is suggested. The study further emphasizes the various dimensions of stress and the functions it can have in oral aspects of translation and drama translation. 展开更多
关键词 shift STRESS supra-segmental linguistic element segmental linguistic element subsystem
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