检索结果-南通市图书馆

Clinical significance of distally located periurethral calcification in patients with lower urinary tract symptoms of benign prostate hyperplasia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2023年第3期25卷 361-365页

作者： seong Hyeon Yu Do Gyeong Lim Sun-Ouck kim Department of Urology Chonnam National University Medical SchoolGwang-ju 61469Korea

This study evaluated the association of periurethral calcification(PUC)with uroflowmetric parameters and symptom severity in male patients with lower urinary tract symptoms(LUTS)of benign prostatic hyperplasia(BPH).The data were collected from a prospectively maintained database of 1321 men with LUTS of BPH who visited Chonnam National University Hospital(Gwang-ju,Korea)from January 2015 to December *** severity and location were evaluated on the midsagittal plane during transrectal *** among age,prostate-related parameters,International Prostate Symptom Score(IPSS),and uroflowmetric parameters were *** the 1321 patients in this study,530(40.1%)had *** with PUC had significantly higher IPSS(mean±standard deviation[s.d.]:15.1±8.7 vs 13.1±7.9;P<0.001)and lower peak flow rate(Qmax;mean±s.d.:12.4±6.6 ml s^(-1) vs 14.7±13.3 ml s^(-1);P<0.001),compared with patients who did not have *** according to PUC severity revealed that patients with severe PUC had higher prostate-specific antigen(PSA)level(P=0.009),higher total IPSS(P<0.001),lower Qmax(P=0.002),and smaller prostate volume(P<0.001),compared with patients who had non-severe(mild or moderate)*** analysis showed that distal PUC was independently associated with high total IPSS(P=0.02),voiding symptom score(P=0.04),and storage symptom score(P=0.023),and low Qmax(P=0.015).In conclusion,PUC was significantly associated with worse LUTS parameters in terms of IPSS and ***,distally located PUC was independently associated with worse LUTS of BPH in men.

关键词： benign prostate hyperplasia calcification location

Upconverting nanoparticle-containing erythrocyte-sized hemoglobin microgels that generate heat,oxygen and reactive oxygen species for suppressing hypoxic tumors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bioactive Materials 2023年第4期22卷 112-126页

作者： Hanju kim Johyun Yoon Hwang Kyung kim woo Tak Lee Nguyen Thi Nguyen Xuan Thien Le Eun-Hee Lee Eun seong Lee Kyung Taek Oh Han-Gon Choi Yu Seok Youn School of Pharmacy Sungkyunkwan University2066 Seobu-roJangan-guSuwonGyeonggi-do16419Republic of Korea College of Pharmacy Korea University2511 Sejong-roSejong30019Republic of Korea Department of Biotechnology and Department of Biomedical-Chemical Engineering the Catholic University of Korea43 Jibong-roBucheon-siGyeonggi-do14662Republic of Korea College of Pharmacy Chung-Ang University84 Heukseok-roDongjak-guSeoul06974Republic of Korea College of Pharmacy Hanyang University55Hanyangdaehak-roSangnok-guAnsan15588Republic of Korea

Inspired by erythrocytes that contain oxygen-carrying hemoglobin(Hb)and that exhibit photo-driven activity,we introduce homogenous-sized erythrocyte-like Hb microgel(μGel)systems(5-6μm)that can(i)emit heat,(ii)supply oxygen,and(iii)generate reactive oxygen species(ROS;1O2)in response to near-infrared(NIR)laser *** μGels consist of Hb,bovine serum albumin(BSA),chlorin e6(Ce6)and erbium@lutetium upconverting nanoparticles(UCNPs;~35 nm)that effectively convert 808 nm NIR light to 660 nm visible *** Hb μGels are capable of releasing oxygen to help generate sufficient reactive oxygen species(^(1)O_(2))from UCNPs/Ce6 under severely hypoxic condition upon NIR stimulation for efficient photodynamic ***,the Hb μGels emit heat and increase surface temperature due to NIR light absorption by heme(iron protoporphyrin IX)and display photothermal *** changing the Hb/UCNP/Ce6 ratio and controlling the amount of NIR laser irradiation,it is possible to formulate bespoke Hb μGels with either photothermal or photodynamic activity or both in the context of combined therapeutic *** Hb μGels effectively suppress highly hypoxic 4T1 cell spheroid growth and xenograft mice tumors in vivo.

关键词： Hemoglobin microgel Upconversion Photothermal therapy Photodynamic therapy Hypoxic tumors Oxygen-generation

Amine functionalization on thermal and mechanical behaviors of graphite nanofibers-loaded epoxy composites

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第20期151卷 80-88页

作者： seong-Hwang kim Sang-Jin Park Seul-Yi Lee Soo-Jin Park Department of Chemistry Inha University100 InharoIncheon 22212the Republic of Korea

With the growing demand for faster and more powerful computing,effective heat dissipation is essential to ensure the longevity,reliability,and high performance of electronic *** the field of modern electronic packaging materials,there is a great need for graphitic material-loaded polymeric composites(GPCs)with excellent thermal ***,the enhancement efficiency of GPCs is hindered by the agglomeration of fillers and the interfacial thermal resistance caused by the lack of continuous thermally conductive pathways between the filler and *** the interfaces between filler and matrix is of great importance in optimizing the performances of ***,we fabricated graphite nanofibers(GNF)-loaded nanocomposites using acid-functionalized GNF(AGNF)and acidtetraethylenepentamine-functionalized(TGNF)as a filler and epoxy resin as a matrix with different GNF loading contents to explore the interfacial properties of the *** optimal GNF loading for AGNF was 0.5 wt.%,while the TGNF showed 0.75 wt.%.The highest thermal conductivity(0.51 W m^(−1) K^(−1))and fracture toughness(25.8 MPa m^(1/2))values were found in the TGNF-loaded nanocomposites with a fraction of 0.75 wt.%,representing enhancements of∼145%and∼400%,respectively,compared to those of neat *** experimental data presented herein demonstrate that the interfacial properties play a significant role in enhancing the thermal and mechanical performances of the *** present approach is expected to serve as a valuable tool in the design of conductive polymeric nanocomposites for further practical applications,such as thermal interface materials and packaging of high-power electric devices.

关键词： Graphite nanofiber Nanocomposites Interfacial interaction Thermal conductivity Fracture resistance

OTP-Based Software-Defined Cloud Architecture for Secure Dynamic Routing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第4期71卷 1035-1049页

作者： Tae woo kim Yi Pan Jong Hyuk Park Department of Computer Science and Engineering Seoul National University of Science and Technology(Seoultech)Seoul01811Korea Department of Computer Science Georgia State UniversityAtlanta30303USA

In the current era,anyone can freely access the Internet thanks to the development of information and communication *** cloud is attracting attention due to its ability to meet continuous user demands for ***,Cloud is effective for systems with large data flow such as the Internet of Things(IoT)systems and Smart ***,the use of traditional networking technology in the cloud causes network traffic overload and network security ***,the cloud requires efficient networking technology to solve the existing *** this paper,we propose one-time password-based software-defined cloud architecture for secure dynamic routing to mitigating the above-mention *** proposed cloud architecture provides a secure data path through dynamic routing using One-Time Internet Protocol(OTIP)algorithm between each *** the network side,we use software-defined technology to provide efficient network management and data *** introduce a software-defined cloud architecture that applies OTIP algorithms for secure dynamic *** conduct a comparative analysis between general IP communication and proposed OTIP communication *** evaluates the performance of OTIP ***,we examine the proposed software-defined cloud architecture,including how to apply OTIP in secure dynamic routing according to the results of the comparative analysis.

关键词： Secure routing dynamic routing one-time password softwaredefined network software-defined perimeter cloud computing

Ultrasensitive and Highly Stretchable Multiple‑Crosslinked Ionic Hydrogel Sensors with Long‑Term Stability

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2023年第4期15卷 85-96页

作者： Jin‑Young Yu Seung Eon Moon Jeong Hun kim seong Min Kang Department of Mechanical Engineering Chungnam National UniversityDaejeon 34134Korea Emerging Nano‑Materials Research Section Electronics and Telecommunications Research InstituteDaejeon 305‑700Republic of Korea

Flexible hydrogels are receiving significant attention for their application in wearable ***,most hydrogel materials exhibit weak and one-time adhesion,low sensitivity,ice crystallization,water evaporation,and poor self-recovery,thereby limiting their application as *** issues are only partly addressed in previous ***,a multiplecrosslinked poly(2-(methacryloyloxy)ethyl)dimethyl-(3-sulfopropyl)ammonium hydroxide-co-acrylamide)(P(SBMA-co-AAm))multifunctional hydrogel is prepared via a one-pot synthesis method to overcome the aforementioned ***,ions,glycerol,and 2-(methacryloyloxy)ethyl)dimethyl-(3-sulfopropyl)ammonium hydroxide are incorporated to reduce the freezing point and improve the moisture retention *** proposed hydrogel is superior to existing hydrogels because it exhibits good stretchability(a strain of 2900%),self-healing properties,and transparency through effective energy dissipation in its dynamic crosslinked ***,2-(methacryloyloxy)ethyl)dimethyl-(3-sulfopropyl)ammonium hydroxide as a zwitterion monomer results in an excellent gauge factor of 43.4 at strains of 1300-1600%by improving the ion transportability and achieving a strong adhesion of 20.9 kPa owing to the dipole-dipole *** proposed hydrogel is promising for next-generation biomedical applications,such as soft robots,and health monitoring.

关键词： Hydrogel sensors Biocompatibility Multifunction High-sensitivity sensors Multiple-crosslink association

High-index-contrast photonic structures:a versatile platform for photon manipulation

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2022年第11期11卷 2617-2632页

作者： Young-Bin kim Jin-woo Cho Yun-Jo Lee Dukkyu Bae Sun-Kyung kim Department of Applied Physics Kyung Hee UniversityYonginGyeonggido 17104Republic of Korea Hexa Solution Co. LtdSuwonGyeonggi-do 16229Republic of Korea

In optics,the refractive index of a material and its spatial distribution determine the characteristics of light ***,exploring both low-and high-index materials/structures is an important consideration in this *** cavities,which are defined as low-index bases,exhibit a variety of unusual or even unexplored optical characteristics and are used in numerous functionalities including diffraction gratings,localised optical antennas and low-loss *** this report,we discuss the fabrication of hollow cavities of various sizes(O.2-5μm in diameter)that are supported by conformal dielectric/metal shells,as well as their specific applications in the ultraviolet(photodetectors),visible(light-emitting diodes,solar cells and metalenses),near-infrared(thermophotovoltaics)and mid-infrared(radiative coolers)*** findings demonstrate that hollow cavities tailored to specific spectra and applications can serve as versatile optical platforms to address the limitations of current optoelectronic ***,hollow cavity embedded structures are highly elastic and can minimise the thermal stress caused by high *** such,future applications will likely include high-temperature devices such as thermophotovoltaics and concentrator photovoltaics.

关键词： versatile index ultraviolet

Estimation of marine winds in and around typhoons using multi-platform satellite observations: Application to Typhoon Soulik (2018)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Earth Science 2022年第1期16卷 175-189页

作者： Seung-woo LEE Sung Hyun NAM Duk-Jin kim School of Earth and Environmental Sciences College of Natural SciencesSeoul National UniversitySeoul 08826Republic of Korea Research Institution of Oceanography College of Natural SciencesSeoul National UniversitySeoul 08826Republic of Korea

Estimating horizontal winds in and around typhoons is important for improved monitoring and prediction of typhoons and mitigating their ***,we present a new algorithm for estimating typhoon winds using multiple satellite observations and its application to Typhoon Soulik(2018).Four kinds of satellite remote sensing data,along with their relationship to typhoon intensity,derived statistically from hundreds of historical typhoon cases,were merged into the final product of typhoon wind(MT wind):(1)geostationarysatellite-based infrared images(IR wind),(2)passive microwave sounder(MW wind),(3)feature-tracked atmospheric motion vectors,and (4)scatterometer-based sea surface winds(SSWs).The algorithm was applied to two cases(A and B)of Typhoon Soulik and validated against SSWs independently retrieved from active microwave synthetic aperture radar(SAR)and microwave radiometer(AMSR2)images,and vertical profiles of wind speed derived from reanalyzed data and dropsonde *** Case A(open ocean),the algorithm estimated the realistic maximum wind,radius of maximum wind,and radius of 15 m/s,which could not be estimated using the reanalysis data,demonstrating reasonable and practical ***,for Case B(when the typhoon rapidly weakened just before making landfall in the Korean Peninsula),the algorithm significantly overestimated the parameters,primarily due to the overestimation of typhoon *** study highlights that realistic typhoon winds can be monitored continuously in real-time using multiple satellite observations,particularly when typhoon intensity is reasonably well predicted,providing timely analysis results and products of operational importance.

关键词： sea surface wind multi-platform satellites Typhoon Soulik(2018)

PUB22 and PUB23 U-box E3 ubiquitin ligases negatively regulate 26S proteasome activity under proteotoxic stress conditions

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2022年第3期64卷 625-631页

作者： Min Yong Ahn Dong Hye Seo woo Taek kim Department of Systems Biology Division of Life ScienceYonsei UniversitySeoul 03722Korea Institute of Life Science and Biotechnology Yonsei UniversitySeoul 03722Korea

The mechanism regulating proteasomal activity under proteotoxic stress conditions remains ***,we showed that arsenite-induced proteotoxic stress resulted in upregulation of Arabidopsis homologous PUB22 and PUB23 U-boxE3 ubiquitin ligases and that pub22 pub23 double mutants displayed arsenite-insensitive seed germination and root growth ***22/PUB23 downregulated 26 S proteasome activity by promoting the dissociation of the 19 S regulatory particle from the holo-proteasome complex,resulting in intracellular accumulation of UbG76 VGFP,an artificial substrate of the proteasome complex,and insoluble poly-ubiquitinated *** results suggest that PUB22/PUB23 play a critical role in arsenite-induced proteotoxic stress response via negative regulation of 26 S proteasome integrity.

关键词： Arabidopsis thaliana proteotoxic stress sodium arsenite U-box E3 ligases PUB22/23 26S proteasome complex

High efficiency CZTSSe solar cells enabled by dual Ag-passivation approach via aqueous solution process

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第2期77卷 239-246,I0007页

作者： Temujin Enkhbat Enkhjargal Enkhbayar Namuundari Otgontamir Md Hamim Sharif Md Salahuddin Mina seong Yeon kim JunHo kim Department of Physics Incheon National UniversityIncheon 22012Republic of Korea Research Center for Thin Film Solar Cells Daegu-Gyeongbuk Institute of Science and Technology(DGIST)Daegu 42988Republic of Korea Global Energy Research Center for Carbon Neutrality Incheon National UniversityIncheon 22012Republic of Korea

Ag substitution in Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)is a promising way to mitigate Cu/Zn related defects,electrostatic fluctuations and Shockley-Read-Hall(SRH)recombination ***,high performance ACZTSSe solar cells are generally demonstrated with more Ag amounts and strenuous fabrication processes,which are not ideal when using cheap constituent materials *** reduce the Ag amount(2%-3%),local Ag substitutions into CZTSSe at front(F),back(B)and dual front/back(FB)were *** results revealed that F-passivation effectively reduced the Cu/Zn related defects and further limits the interface/bulk recombination whereas B-passivation improved the grain growth at the back interface and further allows enhanced transport of charge *** employing the dual Agpassivation approach,the final ACZTSSe device parameters were significantly improved and remarkable power conversion efficiency(PCE)of 12.43%was achieved with eco-friendly aqueous solution process.

关键词： Ag-doped CZTSSe Dual surface passivation Defect passivation Aqueous spray deposition