期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
Self-Enhancement of Scalar and Vector Holographic Gratings in Azobenzene Molecular Glassy Films
1
作者 Andris Ozols Valdis Kokars +4 位作者 Peteris Augustovs Dmitrijs Malinovskis Kaspars Traskovskis Elmars Zarins Girts Ivanovs 《Optics and Photonics Journal》 2014年第6期143-152,共10页
Self-enhancement (SE) effect of scalar and vector holographic gratings (HG) recorded in three different azobenzene molecular glassy films is experimentally studied in both transmission and reflection modes at 532 and ... Self-enhancement (SE) effect of scalar and vector holographic gratings (HG) recorded in three different azobenzene molecular glassy films is experimentally studied in both transmission and reflection modes at 532 and 633 nm. The maximal SE factor (the ratio of diffraction efficiency to its initial value) SEF = 42 has been achieved. It is shown that the model of complementary HG can be applied also in scalar transmission thin HG case to explain coherent SE. The possibility of vector HG coherent SE in transmission mode is experimentally demonstrated for the first time (SEF = 4.3). The possibility of coherent HG SE in reflection mode is also established for the first time (SEF = 21). HG recording processes as well as coherent SE processes are found to be independent in transmission and reflection modes being determined by volume and surface relief HG, respectively. The permittivity gradient mechanism is proposed to explain the coherent SE of surface relief HG. Both HG recording and coherent SE efficiencies strongly decrease when HG period is decreased from 2 mm to 0.5 mm. No relaxational SE effect is found. Coherent SE effect in molecular glasses is found to be weaker than in inorganic materials. 展开更多
关键词 self-enhancement of HOLOGRAMS Light Polarization Holographic GRATINGS AZOBENZENE Molecular GLASSES
下载PDF
Combustion crack-network reaction evolution model for highly-confined explosives
2
作者 Zhuo-ping Duan Meng-Jing Bai +2 位作者 Zhi-ling Bai Xin-jie Wang Feng-lei Huang 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2023年第8期54-67,共14页
The evolution behavior of combustion crack reaction of highly confined solid explosives after non-shock ignition is governed by multiple dynamic processes,including intrinsic combustion of explosives,crack propagation... The evolution behavior of combustion crack reaction of highly confined solid explosives after non-shock ignition is governed by multiple dynamic processes,including intrinsic combustion of explosives,crack propagation,and rapid growth of combustion surface area.Here,the pressure increase can accelerate the combustion rate of explosives,and the crack propagation can enlarge the combustion surface area.The coupling between these two effects leads to the self-enhanced combustion of explosive charge system,which is the key mechanism for the reaction development after ignition.In this study,combustion cracknetwork(CCN) model is established to describe the evolution of combustion crack reaction of highly confined solid explosives after non-shock ignition and quantify the reaction violence.The feasibility of the model is verified by comparing the computational and experimental results.The results reveal that an increase in charge structure size causes an increase in the time of crack pressurization and extension of cracks due to the high temperature-generated gas flow and surface combustion during the initial stage of explosive reaction,but when the casing is fractured,the larger the charge structure,the more violent the late reaction and the larger the charge reaction degree.The input pressure has no obvious influence on the final reaction violence.Further,a larger venting hole area leads to better pressure relief effect,which causes slower pressure growth inside casing.Larger reserved ullage volume causes longer lowpressure induction stage,which further restrains the internal pressure growth.Furthermore,the stronger the casing constraint,the more rapid the self-enhanced combustion of the high temperaturegenerated gas,which results in more violent charge reaction and larger charge reaction degree during casing break.Overall,the proposed model can clarify the effects of intrinsic combustion rate of explosives,charge structure size,input pressure,relief area,ullage volume,and constraint strength on the reaction evolution,which can provide theoretical basis for violence evaluation and safety design for ammunition under accident stimulus. 展开更多
关键词 Solid explosives Non-shock ignition self-enhanced combustion Combustion crack-network(CCN)model Relief area Reaction degree
下载PDF
Self-enhanced photothermal-chemodynamic antibacterial agents for synergistic anti-infective therapy 被引量:2
3
作者 Ning Guo Yu Xia +5 位作者 Yuxi Duan Quanxin Wu Le Xiao Yaxin Shi Bin Yang Yun Liu 《Chinese Chemical Letters》 SCIE CAS CSCD 2023年第2期452-457,共6页
Cu_(2-x)S nanostructures have been intensively studied as outstanding chemodynamic therapy(CDT)and good photothermal therapy(PTT)antibacterial agents due to their highly efficient Cu(Ⅰ)-initiated Fenton-like catalyti... Cu_(2-x)S nanostructures have been intensively studied as outstanding chemodynamic therapy(CDT)and good photothermal therapy(PTT)antibacterial agents due to their highly efficient Cu(Ⅰ)-initiated Fenton-like catalytic activity and good photothermal conversion property.However,they still suffer from shortage of Cu(Ⅰ)supply in the long-term and comparatively low inherent photothermal conversion efficiency.Herein,we constructed a self-enhanced synergistic PTT/CDT nanoplatform(Cu_(1.94)S@MPN)by coating Cu_(1.94)S nanoparticles with Fe(Ⅲ)/tannic acid based metal-polyphenol networks(MPN).Activated by the acidic bacterial infection microenvironment,Cu_(1.94)S@MPN could be decomposed to continuously release Cu(Ⅱ),Fe(Ⅲ)ions and tannic acid.As the result of tannic acid-involved Cu and Fe redox cycling,Cu(Ⅰ)/Fe(Ⅱ)-rich CDT could be achieved through the highly accelerated catalytic Fenton/Fenton-like reactions.More importantly,experimental results demonstrated that Cu_(1.94)S@MPN exhibited both excellent photothermal antibacterial and photothermal-enhanced CDT properties to eradicate bacteria in vitro and in vivo.Overall,this novel nanotherapeutics has great potential to become a clinic candidate for anti-infective therapy in future. 展开更多
关键词 Antibacterial self-enhanced Photothermal therapy Chemodynamic therapy Anti-infective therapy
原文传递
Relationship between Adolescent Materialistic Values and Self-transcendence Values in the New Era
4
作者 Shenxin HU Minzhang YU 《Asian Agricultural Research》 2022年第10期54-57,共4页
In recent years,with increasingly abundant materials,the materialistic values are becoming more and more common in modern times.Some studies also revealed the relationship between materialism and self-enhancement valu... In recent years,with increasingly abundant materials,the materialistic values are becoming more and more common in modern times.Some studies also revealed the relationship between materialism and self-enhancement values.Based on existing studies,this paper sorted out the relationship between materialism and self-transcendence values.Based on this,it came up with some new research directions and methods to improve the self-transcendence behavior of materialists,including using moral compensation to achieve the transformation from self-enhancement to self-transcendence,and using empathy to achieve the transformation from self-enhancement to self-transcendence. 展开更多
关键词 SOCIAL behavior SOCIAL VALUE SOCIAL norms SELF-TRANSCENDENCE self-enhancement
下载PDF
The Influence of Differential Leadership on Employees’Affective Commitment:A Perspective of the Insiders and Outsiders
5
作者 Yunxia Su Minggui Sun 《Journal of Business Administration Research》 2020年第3期12-23,共12页
From the perspective of the insiders and outsiders,this study explores the influence of differential leadership on employees’affective commitment and the moderating effect of leader’s self-enhancing humor and indivi... From the perspective of the insiders and outsiders,this study explores the influence of differential leadership on employees’affective commitment and the moderating effect of leader’s self-enhancing humor and individual traditionality.The results show that the differential leadership has a positive impact on the organizational affective commitment of employees,the leader’s self-enhancing humor and the employees’traditionality play a positive regulatory role respectively.Moreover,compared with the outsiders,the low traditionality has a stronger influence on the relationship between differential leadership and organizational affective commitment of the insiders.This paper enriches the research on the influence of leadership style on employee’s affective commitment,proposes and verifies the moderation of leader’s self-enhancing humor and employee’s traditionality,which complements the boundary conditions for the effectiveness of differential leadership style. 展开更多
关键词 Differential leadership Affective commitment Insiders OUTSIDERS self-enhancing humor Traditionality
下载PDF
Biomimetic copper single-atom nanozyme system for self-enhanced nanocatalytic tumor therapy 被引量:2
6
作者 Daoming Zhu Ruoyu Ling +5 位作者 Hao Chen Meng Lyu Haisheng Qian Konglin Wu Guoxin Li Xianwen Wang 《Nano Research》 SCIE EI CSCD 2022年第8期7320-7328,共9页
Single-atom nanozymes(SAZs)with peroxidase(POD)-like activity have good nanocatalytic tumor therapy(NCT)capabilities.However,insufficient hydrogen peroxide(H2O2)and hydrogen ions in the cells limit their therapeutic e... Single-atom nanozymes(SAZs)with peroxidase(POD)-like activity have good nanocatalytic tumor therapy(NCT)capabilities.However,insufficient hydrogen peroxide(H2O2)and hydrogen ions in the cells limit their therapeutic effects.Herein,to overcome these limitations,a biomimetic single-atom nanozyme system was developed for self-enhanced NCT.We used a previously described approach to produce platelet membrane vesicles.Using a high-temperature carbonization approach,copper SAZs with excellent POD-like activity were successfully synthesized.Finally,through physical extrusion,a proton pump inhibitor(PPI;pantoprazole sodium)and the SAZs were combined with platelet membrane vesicles to create PPS.Both in vivo and in vitro,PPS displayed good tumor-targeting and accumulation abilities.PPIs were able to simultaneously regulate the hydrogen ion,glutathione(GSH),and H2O2 content in tumor cells,significantly improve the catalytic ability of SAZs,and achieve self-enhanced NCT.Our in vivo studies showed that PPS had a tumor suppression rate of>90%.PPS also limited the synthesis of GSH in cells at the source;thus,glutamine metabolism therapy and NCT were integrated into an innovative method,which provides a novel strategy for multimodal tumor therapy. 展开更多
关键词 single-atom nanozymes biomimetic system self-enhanced nanocatalytic tumor therapy glutamine metabolism inhibition glutathione(GSH)depletion
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部