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Assembly of zinc metallacrowns with an a-amino hydroxamic acid ligand

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Chinese Chemical Letters 2015年第4期26卷 444-448页

作者： Joseph Jankolovits Jeff w.Kampf vincent L.Pecoraro Chemistry Department University of Michigan

In the assembly of metallacrowns for molecular recognition, luminescence, and molecular magnetism applications, substituting the ring ion can have profound effects on the structure, stability, and physical properties of the inorganic macrocycle. The assembly of Zn（ll） metallacrowns with an ,^-amino hydroxamic acid ligand （pheHA） was investigated studied metallacrowns containing Cu（lI） and Ni（I1）. to compare the assembly behavior with the well Electrospray ionization mass spectrometry reveals that the benchmark species Zns（pheHA）42＋ and LnZns（pheHA）s3. assemble in pyridine, which is consistent with the behavior of Cu（II） and Ni（ll）. A LnZn4（pheHA）43. species is also observed in a 1：1 DMF-pyridine mixture. An unprecedented La（III）[16-MCznul）.pn^HA,HpheHA-6]s＋ complex was crystallo- graphically characterized that possesses unusual C2 symmetry. These results provide insights into the design of functional metallacrowns through ring ion substitution.

关键词： MetallacrownSelf-assemblySupramolecular chemistryLanthanide5Zinc

Human protamines and the developing spermatid: their structure, function, expression and relationshipwith male infertility

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Asian Journal of Andrology 2003年第4期5卷 315-324页

作者： vincent w. Aoki Douglas T. Carrell Andrology and IVF Laboratories University of Utah School of Medicine Salt Lake City UT 84108 USAAndrology and IVF Laboratories University of Utah School of Medicine Salt Lake City UT 84108 USA

During spermiogenesis, the protamine proteins play an integral role in spermatid chromatin compaction. Recent research has focused on many facets of protamine biology, including protamine gene and protein structure/ function relationships, mechanisms of protamine expression regulation and involvement of the protamines in male fertility. In this paper, we review our current understanding of the structure and function of the protamine-1 (P1) and protamine-2 (P2) proteins and genes, the expression and regulation of these genes and the relationship between the protamines and male fertility. In addition, we offer a brief outlook on future investigation into protamine proteins.

关键词： protamines spermatids male infertility spermatid transition proteins

Probabilistic assessment of overcooling risk for a novel extra-low temperature dedicated outdoor air system for Hong Kong office buildings

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Building Simulation 2021年第3期14卷 633-648页

作者： Yani Bao w.L.lee Jie Jia Department of Building Services Engineering The Hong Kong Polytechnic UniversityHong KongChina Department of Built Environment and Energy Utilization Engineering Taiyuan University of TechnologyTaiyuan 030024China

Overcooling causes thermal discomfort and wastes *** of a novel dedicated outdoor air system(DOAS)consisting of a multi-stage direct expansion coil to generate extra-low temperature(XT)outdoor air to handle the entire space cooling demand for better energy and humidity control has been confirmed in previous *** these studies,the terminal system was assumed using variable air volume(VAV)without *** conventional VAV system without reheating has overcooling *** is associated with uncertain fluctuations of operating ***,virtually no study has been done to investigate its overcooling risk,and how it is compared with *** this study,a rigorous probabilistic approach is proposed to account for the uncertain fluctuations of operating characteristics to assess their overcooling *** Carlo simulations with 10,000 interactions was used for risk analysis.A morphing method was employed to develop 10,000 weather files that could give an accurate prediction of future variations in yearly weather *** datasets were used to develop the probability distribution functions to account for the daily variations in use *** most probable operating characteristics were input to EnergyPlus for hour-by-hour *** annual cooling load profile formulated by the probabilistic approach was successfully validated by in-situ *** probabilistic assessment results show that XT-DOAS has far less overcooling hours and lower long-term percentage of dissatisfied than the conventional VAV *** results also indicate that the proposed probabilistic approach is useful for a robust system performance evaluation.

关键词： overcooling risk Monte Carlo simulation uncertainty analysis extra-low temperature system VAV system

Effect of Eu^(3+),Bi^(3+),and Li^(+) doping on luminescent property of GdNbO_(4)

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Journal of Rare Earths 2024年第1期42卷 66-75,I0003页

作者： S.w.wi Y.S.lee Department of Physics and Integrative Institute of Basic Sciences Soongsil UniversitySeoul06978Republic of Korea

we investigated the emission properties of Eu^(3+)-doped GdNbO_(4)-based oxide phosphors,aiming at improving the Eu^(3+)emission by codoping of Bi^(3+)and Li^(+).Eu^(3+)singly doped,Eu^(3+)and Bi^(3+)doubly doped,and Eu^(3+),Bi^(3+),and Li^(+)triply doped GdNbO_(4)were prepared using a high-temperature solid-state reaction *** red-orange emissions from Eu^(3+)in the singly doped samples are significantly improved by the codoping of Bi^(3+),mainly due to the energy transfer from Bi^(3+)to Eu^(3+).The additional codoping of Li^(+)is found to increase the Eu^(3+)emission *** improvement might be attributed to the increase in the photoluminescent quantum yield originating from larger grain sizes and better crystallinity.A detailed analysis of the X-ray diffraction pattern and the asymmetric ratio estimated from the photoluminescence spectra show that the local lattice environment around Eu^(3+)in GdNbO_(4)does not change significantly with the codoping of Bi^(3+)and Li^(+).Our results indicate that Li^(+)doping is a promising way to improve the emission properties of rare-earth ion-doped GdNbO_(4)phosphors.

关键词： Eu^(3+) GdNbO_(4) Codoping of Li^(+) Photoluminescence Sensitizer Rare earths

Tourism Developments Increase Tsunami Disaster Risk in Pangandaran, west Java, Indonesia

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International Journal of Disaster Risk Science 2021年第5期12卷 764-769页

作者： vincent Nijman Department of Social Sciences Oxford Brookes UniversityOxford OX30BP.United Kingdom

On 17 July 2006,the tourist resort of Pangandaran on Java’s south coast was hit by a tsunami,resulting in 413 fatalities and severe damage to *** tsunami resulted in major rebuilds with a focus on mass *** of the impact of a future tsunami focussed on building development and suggest limited change since *** article presents a case study on the development of(largely domestic)tourism in Pangandaran and how this has increased the tsunami disaster *** numbers were stable at about 900,000 visitors a year prior to the tsunami,down to slightly over 250,000 visitors a year in its aftermath,and from 2007 onwards numbers are doubling every three years to about 4 million visitors in *** increase has been most pronounced during *** to 2006,Pangandaran was characterized by wooden structures and one-and two-story buildings of clay-brick masonry;by 2019,14 three to sixstory hotels have been erected along the *** many more visitors,most of whom are unfamiliar with tsunami risks,and shelter facilities for less than a quarter of visitors during peak times,future impacts and the potential cost to life are considerably higher now than in 2006,especially if a tsunami were to hit over a *** tourists upon arrival and throughout their stay should be better informed about the risks of tsunamis,and of the location of tsunami shelters and evacuation routes.

关键词： Disaster resilience Effective warning Indonesia Risk mitigation Tourism Tsunami

Strain and stress analysis on Zn multicrystal film by XRD method

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中国有色金属学会会刊：英文版 2006年第B02期16卷 735-738页

作者： vincent JI LIM UMR CNRS8006ENSAM 151Boulevard de I'Hopital75013 ParisFrance

A new method was denonstrated to determine stress in a single crystal for multicrystal material and this new method could be specially applied for any symmetric crystalline systems. The strain tensor e was determined by the change of the metric tensor G before the initial state and after the deformed state in the crystal reference system. Then stress tensor at grain scale was calculated by the HOOK's law. The stress evaluations were carried out in coarse grains of a thin galvanized coating on a steel substrate during tensile loading. This makes it possible to link the microstructure evolution to the elastic heterogeneity at grain scale or between the grains.

关键词：锌多晶膜单晶应力应变分析 XRD法锌镀层

Performance of LIDAR- and radar-based turbulence intensity measurement in comparison with anemometer-based turbulence intensity estimation based on aircraft data for a typical case of terrain-induced turbulence in association with a typhoon

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第7期14卷 469-481页

作者： P.w.CHAN Y.F.lee Hong Kong Observatory

The Hong Kong Observatory (HKO) provides low-level turbulence alerting service for the Hong Kong International Airport (HKIA) through the windshear and turbulence warning system (wTwS). In the wTwS, turbulence intensities along the flight paths of the airport are estimated based upon correlation equations established between the surface anemometer data and the turbulence data from research aircraft before the opening of the airport. The research aircraft data are not available on day-to-day basis. The remote sensing meteorological instruments, such as the Doppler light detection and ranging (LIDAR) and radar, may be used to provide direct measurements of turbulence intensities over the runway corridors. The performances of LIDAR- and radar-based turbulence intensity data are studied in this paper based on actual turbulence intensity measurements made on 423 commercial jets for a typical case of terrain-induced turbulence in association with a typhoon. It turns out that, with the tuning of the relative operating characteristic (ROC) curve between hit rate and false alarm rate, the LIDAR-based turbulence intensity measurement performs better than the anemometer-based estimation of wTwS for turbulence intensity at moderate level or above. On the other hand, the radar-based measurement does not perform as well when compared with wTwS. By combining LIDAR- and radar-based measurements, the performance is slightly better than wTwS, mainly as a result of contribution from LIDAR-based measurement. As a result, the LIDAR-based turbulence intensity measurement could be used to replace anemometer-based estimate for non-rainy weather conditions. Further enhancements of radar-based turbulence intensity measurement in rain would be necessary.

关键词： Fault tolerant High availability quadruple vital computer (HAQVC) Reliability availability maintainability and safety (RAMS)

Pan-TRK positive uterine sarcoma in immunohistochemistry without neurotrophic tyrosine receptor kinase gene fusions:A case report

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world Journal of Clinical Cases 2025年第2期13卷 39-49页

作者： Seungmee lee Yu-Ra Jeon Changmin Shin Sun-Young Kwon Sojin Shin Department of Obstetrics and Gynecology Keimyung University School of MedicineDaegu 42601South Korea Department of Pathology and Institute for Cancer Research Keimyung University School of MedicineDaegu 42601South Korea

BACKGROUND The classification of uterine sarcomas is based on distinctive morphological and immunophenotypic characteristics,increasingly supported by molecular genetic *** on neurotrophic tyrosine receptor kinase(NTRK)gene fusionpositive uterine sarcoma,potentially aggressive and morphologically similar to fibrosarcoma,are limited due to its recent ***-TRK immunohistochemistry(IHC)analysis serves as an effective screening tool with high sensitivity and specificity for NTRK-fusion *** SUMMARY we report a case of a malignant mesenchymal tumor originating from the uterine cervix,which was pan-TRK IHC-positive but lacked NTRK gene fusions,accompanied by a brief literature review.A 55-year-old woman presented to the emergency department with abdominal pain and distension,exhibiting significant ascites and multiple solid pelvic *** examination revealed a tumor encompassing the uterine cervix,extending to the vagina and uterine corpus.A punch biopsy of the cervix indicated NTRK sarcoma with positive immunochemical pan-TRK ***,subsequent next generation sequencing revealed no NTRK gene fusion,leading to a diagnosis of poorly differentiated,advanced-stage *** The clinical significance of NTRK gene fusion lies in potential treatment with TRK inhibitors for positive *** such rare tumors is crucial due to the potential applicability of tropomyosin receptor kinase inhibitor treatment.

关键词： Uterine sarcoma Cervical sarcoma Neurotrophic tyrosine receptor kinase gene fusion Next generation sequencing Case report

Effect of coating material and lubricant on forming force and surface defects in wire drawing process

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Transactions of Nonferrous Metals Society of China 2011年第A01期21卷 104-110页

作者： S.M.BYON S.J.lee D.w.lee Y.H.lee Y.lee Department of Mechanical Engineering Dong-A University Department of Mechanical Engineering Chung-Ang University wire Rod Research Group POSCO Technical Research Laboratories

A pilot wire drawing machine as well as wire end-pointing roller was developed. Using these machines, a wire drawing test for four different coating materials and two different lubricants was performed as the reduction ratio increased from 10% to 30%. Materials used for a substrate in this study are plain carbon steel （AIS11045） and ultra low carbon bainite steel. To compute the friction coefficient between the coating layer of wire and the surface of die lbr a specific lubricant, a series of finite element analyses were carried out. SEM observations were also conducted to investigate the surface defects of wire deformed. Results show that the behavior of drawing force varies with the lubricant-type at the initial stage of drawing. The powder-typed lubricant with a large particle causes the retardation of lull lubrication on the entire contact surface and the local delamination of coating layer on the wire surface. As the flow stress of a substrate increases, the delamination becomes severe.

关键词： coating lubricant wire drawing delamination