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Optical Identifications of Companion Soft X-ray Sources of Mrk 231

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Chinese Journal of Astronomy and Astrophysics 2001年第6期1卷 501-506页

作者： HongWu Zu-GanDeng Xiao-yangxia NationalAstronomicalObservatories ChineseAcademyofSciencesBeijing100012 GraduateSchool ChineseAcademyofSciencesBeijing100080 DepartmentofPhysics TianjinNormalUniversity300074Tianjin

We present optical identification results for four ROSAT PSPC soft X-ray companions of Mrk 231 based on the deep BATC 6660 A-band image and the optical spectra obtained by the 60/90cm Schmidt telescope and the 2.16 m telescope at the Xinglong Station, NAOC. Three optical counterparts are quasars with redshifts z> 1 and the remaining X-ray source is probably a background galaxy cluster. Therefore, none of these soft X-ray companions are physically connected with the central X-ray source Mrk 231. Incorporating the previous results of Arp 220 and Mrk 273 (Xia et al. 1998, 1999), we suggest that the apparent soft X-ray associations with ULIRGs are chance coincidence in most cases.

关键词： galaxies: individual (Mrk 231) - X-rays: galaxies - quasars

Perioperative management of primary liver cancer

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World Journal of Gastroenterology 2007年第13期13卷 1970-1974页

作者： Hui-Hua yiao Department of General Surgery West China Hospital Sichuan University

AIM:To minimize the complications and mortality and improve the survival in primary liver cancer (PLC) patients undergoing hepatic resection. METHODS: We conducted a retrospective analysis of 2143 PLC patients treated from January 1990 to January 2004. The patients were divided into two groups using January 1997 as a cut-off. Small tumor size (< 5 cm), preoperative redox tolerance index (RTI), vascular control method, and postoperative arterial ketone body ratio (AKBR) were used as indicators of surgical outcome. RESULTS: Small tumors had less complications and lower mortality and higher overall survival rate. Use of RTI for selecting patients and types of hepatectomy, reduced complications (21.1% vs 11.0%) and mortality (1.6% vs 0.3%). The half liver vascular occlusion protocol (n = 523) versus the Pringle method (n = 476) showed that the former significantly reduced the postoperative complications (25.8% vs 11.9%) and mortality (2.3% vs 0.6%) respectively, and cut mean hospital stay was 3.5 d. Postoperative AKBR was a reliable indicator of the energy status in survivors. CONCLUSION: RTI is of value in predicting hepatic functional reserve, half liver occlusion could protect the residual liver function, and AKBR measurement is a simple and accurate means of assessing the state of postoperative metabolism. Optimal perioperative management is an important factor for minimizing complications and mortality in patients undergoing hepatic resection.

关键词： Liver cancer Hepatectomy Optimal perioperative management Arterial ketone body ratio Redox tolerance index

Sources of the Laoxiongdong carbonate-hosted Pb–Zn deposit in Southwest China:constraints from S–Pb–Zn isotopic compositions

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Acta Geochimica 2020年第5期39卷 717-732页

作者： Wenyuan Wang Jianguo Gao Keyong Wang yangxia Nong College of Earth Sciences Jilin UniversityChangchun 130061China Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming 650093China Kunming Metallurgical Research Institute Kunming 650031China

The Sichuan-Yunnan-Guizhou(SYG)Pb-Zn mineral province,which has significant Pb-Zn repositories in China,is situated in the western Yangtze *** decades of research,the Pb-Zn source of deposits is still disputed between the basement rocks,sedimentary wall rocks,or the Emeishan flood *** newly-discovered Laoxiongdong Pb-Zn deposit is hosted by the Late Ediacaran Dengying Formation in the SYG ***,the Laoxiongdong orebodies lie between regional deep faults and close to the Proterozoic basement and Emeishan ***,this deposit represents a good case study on the ore-forming material source for the regional Pb-Zn *** Laoxiongdong Pb-Zn ores are massive,vein,or disseminated and have mainly sphalerite,galena,pyrite,quartz,and *** this paper,we present new sulfide S-Pb-Zn isotope data of the *** sulfideδ34SCDT values(+11.8 to+16.5‰)suggest that the reduced sulfur was mainly sourced from evaporites in the Late Ediacaran-Cambrian *** isotopic ratios(206Pb/204Pb=18.004-18.107,207Pb/204Pb=15.652-15.667,and 208Pb/204Pb=38.037-38.248)suggest that the lead metal was primarily originated from the basement *** sphaleriteδ66Zn values(+0.16 to+0.37‰)are also highly similar(within error)to those of basement rocks(+0.10 to+0.34‰),suggesting a basement-rocks zinc source with minor contributions from the carbonate host rocks and Emeishan flood *** narrow sphalerite Zn isotopic range(0.21‰)also indicates that the Zn isotopic fractionation between the sphalerite and initial fluid was limited during the sphalerite ore ***,we propose that both the Late Ediacaran Dengying Formation rocks and Proterozoic basement rocks were important ore-forming material source for the Laoxiongdong deposit,whereas the Emeishan flood basalts represent only a minor ore-material source.

关键词： S–Pb–Zn isotopes The Laoxiongdong Pb–Zn deposit Sichuan–Yunnan–Guizhou Pb–Zn mineral province Southwest China

A DWT Power Spectrum Analysis of PSCz Galaxies

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Chinese Journal of Astronomy and Astrophysics 2001年第3期1卷 200-212页

作者： yiao－HuYang Long－LongFeng 等 CenterforAstrophysics UniversityofScienceandTechnologyofChinaHeifei230026 NationalAstronomicalObserv

The power spectrum estimator based on the Discrete Wavelet Transfor- mation (DWT) is applied to detect the clustering power in the IRAS Point Source Catalog Redshift Survey (PSCz). Comparison with mock samples extracted from N-body simulation shows that the DWT power spectrum estimator could provide a robust measurement of banded fluctuation power over a range of wavenumbers 0.1 ~ 2.0hMpc-1. We have fitted three typical CDM models (SCDM, τCDM and CDM) using the Peacock-Dodds formula including non-linear evolution and redshift distortion. We find that, our results are in good agreement with other statistical measurements of the PSCz.

关键词： large-scale structure of Universe - Methods: N-body simulations

Deep eutectic solvent-driven self-assembly of metal mercaptide complexes with enzyme-mimicking activities for detection of uric acid through one-step cascade catalytic reaction

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Green Chemical Engineering 2024年第1期5卷 75-84页

作者： Jean Claude Munyemana Jia Chen Xin Li yangxia Han Hao Tang Hongdeng Qiu CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing100039China Department of Pharmacy Gansu Provincial HospitalLanzhou730000China

This work presents a generic strategy to create a series of metal mercaptides complexes via coordination selfassembly between transition metals(Mn,Cu,Co,Fe,and Ni)and cysteine(Cys)by forming the sulfur-metal *** strategy involves dissolving metal chlorides and Cys into deep eutectic solvents(DES),followed by the precipitation of metal mercaptides complexes(such as Cys-Mn)by adding water as an antisolvent,where DES serves as the solvent,shape directing,and capping agent,thereby preventing the formation of other metal ***,the prepared complexes possess both laccase and peroxidase-like properties,allowing the design of a technique for the detection of L-3,4-dihydroxyphenylalanine(L-DOPA)and uric acid,*** prepared Cys-Mn can linearly oxidize L-DOPA with its concentrations from 0.1 to 130μM and the detection limit was calculated to be 75.5 n ***,the Cys-Mn can mimic the activity of peroxidase towards oxidization of o-phenylenediamine at neutral p H,allowing single-step and one-pot cascade reactions for visual and fluorometric measurements of uric acid(UA)that could work in the range of 0.2-500μM UA with a detection limit of 0.06μM and 0.054μМ,*** assay was successful in detecting UA in serum and urine samples with relative standard deviation(RSD)ranging from 7.3%to 10.2%and 3.0%-8.5%respectively,suggesting that it may prove useful in medical diagnostic testing.

关键词： Metal-mercaptides Deep eutectic solvents Self-assembly Peroxidase-mimic catalyst Uric acid detection

Real-time beam shaping without additional optical elements

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Light(Science & Applications) 2018年第1期7卷 881-891页

作者： Felix Fries Markus Fröbel Pen yiao Ang Simone Lenk Sebastian Reineke Dresden Integrated Center for Applied Physics and Photonic Materials(IAPP) Technische Universität DresdenNöthnitzer Straße 61Dresden 01187Germany

Providing artificial light and enhancing the quality of the respective light sources is of continued interest in the fields of solid state,condensed matter,and semiconductor *** research has been carried out to increase the luminous efficiency,lifetime and colour stability of such ***,the emission characteristics of a given light source do not necessarily comply with today’s often sophisticated ***,beam shaping addresses the transformation of a given light distribution into a customized *** is typically achieved by secondary optical elements often sporting elaborate designs,where the actual light source takes up only a small fraction of the system’s *** designs limit the final light source to a single permanent operation mode,which can only be overcome by employing mechanically adjustable optical *** we show that organic light-emitting diodes(OLEDs)can enable real-time regulation of a beam shape without relying on secondary optical elements and without using any mechanical *** a red light-emitting two-unit OLED architecture,we demonstrate the ability to continuously tune between strongly forward and strongly sideward emission,where the device efficiency is maintained at an application-relevant level ranging between 6 and 8%of external quantum efficiency for any chosen *** combination with additional optical elements,customizable and tuneable systems are possible,whereby the tuning stems from the light source itself rather than from the use of secondary optics.

关键词： tuning beam elements

Constructing heterojunction interface of Co_(3)O_(4)/TiO_(2) for efficiently accelerating acetaminophen degradation via photocatalytic activation of sulfite

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Chinese Chemical Letters 2023年第3期34卷 200-205页

作者： Qiangwei Li Mengmeng Zhang Yongyi Xu Xiaoqi Quan yiao Xu Wen Liu Lidong Wang Department of Environmental Science and Engineering Hebei Key Lab of Power Plant Flue Gas Multi–Pollutants ControlNorth China Electric Power UniversityBaoding 071003China The Key Laboratory of Water and Sediment Sciences Ministry of EducationCollege of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China China Power Hua Chuang Electricity Technology Research Company Ltd. Suzhou 215123China

Achieving efficient degradation of organic pollutants via activation of sulfite is meaningful but ***,we have constructed a heterogeneous catalyst system involving Co_(3)O_(4) and TiO_(2) nanoparticles to form the p-n heterojunction(Co_(3)O_(4)/TiO_(2)) to degrade acetaminophen(ACE) through photocatalytic activation of ***,X-ray photoelectron spectroscopy analysis and theoretical calculations provide compelling evidence of electron transfer from Co_(3)O_(4) to TiO_(2) at the *** interfacial electron redistribution of Co_(3)O_(4)/TiO_(2) tunes the adsorption energy of HSO_(3)^(-)/SO_(3)^(2-) in sulfite activation process for enhanced the catalytic *** to its unique heterointerface,the degradation efficiency of ACE reached 96.78%within 10 *** predominant active radicals were identified as ·OH,h^(+),and SO_(x)^(·-) through radical quenching experiments and electron spin resonance ***,the possible degradation pathway was deduced by monitoring the generated intermediate ***,the enhanced roles of well-engineered compositing interface in photocatalytic activation of sulfite for complete degradation of ACE were unveiled that it can improve light absorption ability,facilitate the generation of active species,and optimize reactive *** that sulfite is a waste from flue gas desulfurization process,the photocatalytic activation of sulfite system will open up new avenues of beneficial use of air pollutants for the removal of pharmaceutical wastewater.

关键词： Sulfite Photocatalytic activation Charge transfer Heterojunction interface Degradation mechanism

YMDD mutations in patients with chronic hepatitis B untreated with antiviral medicines

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World Journal of Gastroenterology 2005年第6期11卷 867-870页

作者： Zhong-MinHuang Qi-WenHuang Ya-QinQin Yan-ZhuanHe Hou-JiQin yiao-NanZhou XiangXu Mei-JinHuang DepartmentofInfectiousDiseases TheAffiliatedHospitalofYouJiangMedicalCollegeforNationalitiesBaise533000GuangxiZhuangAutonomousRegionChina

AIM: To polymerase P region (YMDD) mutations of hepatitis B virus gene (HBV DNA) in patients with chronic hepatitis B (CHB) untreated with antiviral medicines and to explore its correlation with pre-c-zone mutations, HBV genotypes and HBV DNA level, and to observe its curative ***: A total of 104 cases (38 cases in group of familial aggregation and 66 cases in group of non-familial aggregation) were randomly chosen from 226 patients with CHB who did not receive the treatment of lamivudine (LAM)and any other antivirus drugs within the last one *** serum YMDD mutations were detected by microcosmic nucleic acid and cross-nucleic acid quantitative determination,HBV genotypes by PCR-microcosmic nucleic acid crossELISA, HBV DNA quantitative determination and fluorescence ration PCR analysis, hepatitis B virus markers (HBVM) by ELISA. LAM was taken by 10 patients with YMDD mutations and its curative effect was ***: Twenty-eight cases (26.9%) had YMDD mutations, of them 11 cases (28.9%) were in familial aggregation group (38 cases) and 17 cases (25.8%) in nonfamilial aggregation group (66 cases) with no significant difference between the two groups. Twenty-seven point one percent (16/59) cases were positive for HBeAg YMDD mutations, and 26.7% (12/45) cases were negative for HBeAg and positive for anti-HBe. There was also no significant difference between the two groups. Different YMDD incidence rate existed in different HBV *** DNA level did not have a positive correlation with the incidence of YMDD mutations. LAM was effective for all patients with ***: Wild mutant strains in HBV and their incidence rate have no significant difference between familial aggregation and non-familial aggregation. It may have no significant relationship between YMDD mutations and pre-c-zone mutations. HBV DNA level may not have a positive correlation with YMDD mutations. LAM is clinically effective for CHB patients with YMDD mutations.

关键词： Hepatitis B virus Chronic hepatitis Genotypes YMDD mutation Lamivudine

A study of portal vein embolization with absolute ethanol injection in cirrhotic rats

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World Journal of Gastroenterology 1998年第5期4卷 52-54页

作者： LU Ming De, YIN yiao Yu and REN Wei

AIM To investigate the effects of portal vein embolization (PVE) with absolute ethanol injection on the cirrhotic *** Absolute ethanol was injected intraportally into normal and cirrhotic SD rats and the changes of the animals in anatomy, pathology, liver function as well as portal hemodynamics were *** At a dose of 0.05mL/100g of ethanol, the survival rate was 100% in normal rats compared with 40.9% in cirrhotic rats. PVE in the cirrhotic rats with 0.03mL/100g of ethanol, caused significant hypertrophy in non-embolized lobes, mild or moderate damage to the hepatic parenchyma, slight and transient alterations in liver function, portal pressure and portal *** PVE with absolute ethanol injection in the setting of liver cirrhosis could be safe at an appropriate dose, and precautions aimed at preserving liver function were *** vein embolization (PVE) plays an important role in the management of hepatocellular carcinoma (HCC). We modified the conventional method of transcatheter embolization and developed a new PVE technique with ethanol injection via a fine needle in experimental study[1] and subsequent clinical application under guidance of portoechography[2]. To further elucidate the therapeutic basis of this technique, particularly its effects on the cirrhotic liver, we observed the alterations in liver anatomy, pathology, biochemistry and portal hemodynamics in cirrhotic rats undergoing PVE with ethanol injection.

关键词： liver cirrhosis/therapy embolization, therapeutic absolute ethanol portal vein hemodynamics