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Transition along gradient from warm to mesic temperate forests evaluated by GAMM

Journal of Plant Ecology 2016年第4期9卷 421-433页

作者： AndražČarni Vlado Matevski Nina Juvan Mitko Kostadinovski Petra Košir Aleksander Marinšek Andrej Paušič UrbanŠilc Institute of Biology Research Centre of the Slovenian Academy of Sciences and ArtsNovi trg 2SI-1000 LjubljanaSlovenia University of Nova Gorica Vipavska 13SI-5000 Nova GoricaSlovenia Macedonian Academy of Sciences and Arts Bul.Krste Misirkov2P.O.Box 428MK-1000 SkopjeRepublic of Macedonia Faculty of Natural Sciences and Mathematics Institute of BiologyUniversity of Ss.Cyril and MethodiusGazi Baba b/b-P.O.Box 162MK-1000 SkopjeRepublic of Macedonia Anton Melik Geographical Institute Research Centre of the Slovenian Academy of Sciences and ArtsNovi trg 2SI-1000 LjubljanaSlovenia Faculty of Mathematics Natural Sciences and Information TechnologiesUniversity of PrimorskaGlagoljaška 8SI-6000 KoperSlovenia Slovenian Forestry Institute Večna pot 2SI-LjubljanaSlovenia Kranjčeva 8 SI-9220 LendavaSlovenia Biotechnical Centre Naklo Strahinj 99SI-4202 NakloSlovenia

Aims The aim of the study was to discover what set of variables best explains the transition from warm to mesic forest *** on various variables grouped into sets(geomorphological,ecological,structural,soil characteristics and chorological),six models were built and tested by generalized additive mixed models(GAMMs).We assumed that each set of variables has different explanatory *** aim was to compare the six different models(sets of variables),to test which model best explains the species turnover in forest communities along the transition between warm and mesic temperate forests and to try to find reasons for the different explanatory power of the *** The research took place in the southern part of the Balkan *** sampling was done according to standard *** gradient from warm to mesic forests was defined as the turnover of species and evaluated by projection of samples on the first unconstrained DCA ***,ecological,structural and soil characteristics,together with chorological sets of variables,were regressed on the turnover of species *** on the five sets of variables,six models were constructed and tested by generalized additive mixed *** Findings Ecological conditions best explain the change of forest communities along the gradient;evolution and the development of vegetation reflected in chorotypes are also of high importance;geomorphology and structure seem not to change so dramatically and soil shows the least significant differences of *** variables are the most important set of variables in the transition between warm and mesic temperate forests but eco-evolutionary dynamics after the Pleistocene should also be taken into consideration.

关键词： Balkan chorotypes life forms ecology plant ecology soil science vegetation evolution refugium

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Role of C11-FDG dual-tracer PET-CT scan in metastatic screening of hepatocellular carcinoma-a cost-effectiveness analysis

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hepatobiliary Surgery and Nutrition 2021年第3期10卷 301-307页

作者： Kevin K.W.Chu Albert C.Y.Chan ka Wing Ma Wong hoi She Wing Chiu Dai Kenneth S.h.Chok Tan To Cheung Chung Mau Lo Department of Surgery The University of Hong KongHong KongChina

Background:We aimed to identify predictive factors for positron emission tomography(PET)-detected hepatocellular carcinoma(hCC)metastasis and a cost-effective approach to preoperative PET-computed tomography(CT)for detecting ***:Clinicopathological and survival data of hCC patients having PET-CT with 18F-fludeoxyglucose(FDG)and 11C-acetate(ACT)following contrast-enhanced CT/magnetic resonance imaging(MRI)for preoperative tumor staging were *** logistic regression was performed to identify predictive factors for PET-detected metastasis.A cost-benefit analysis model was built for the incurred costs and the impact of PET-CT findings on treatment strategy was ***:Totally 152 patients were ***-tracer PET-CT detected metastasis in 17 patients(11%).By multivariate analysis,alpha-fetoprotein(AFP)≥400 ng/mL[relative risk(RR):4.30,95%confidence interval(CI):1.41-13.15,P=0.011]and bilobar disease(RR:3.94,95%CI:1.24-12.52,P=0.014)were independent predictive factors for PET-detected ***-CT findings altered the treatment strategy for 12 patients(7.9%);three partial hepatectomies,eight episodes of transarterial chemoembolization(TACE)and one episode of ablation were avoided,with an estimated cost-saving of US$91,000,$150,000 and$10,600 *** the PET-CT been performed only for patients with AFP≥400 ng/mL or bilobar disease(n=74),metastasis would have been confirmed in 14 patients(18.9%),and the cost-saving per patient was estimated at US$1,***:Dual-tracer PET-CT is cost-effective and useful for preoperative hCC staging in patients with AFP≥400 ng/mL or bilobar *** routine use in preoperative workup for all hCC patients is not *** disease with AFPhieve good negative predictive value for PET-detected *** patients with either factor can avoid unnecessary procedures and is thus cost-effective for preoperative hCC workup.

关键词： Cost-effectiveness study dual-tracer positron emission tomography-computed tomography(dual-tracer PET-CT) hepatocellular carcinoma(hCC) metastatic screening preoperative investigation

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Effects of icariin on cGMP-specific PDE5 and cAMP-specific PDE4 activities

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Asian Journal of Andrology 2003年第1期5卷 15-18页

作者： ZC Xin ek Kim CS Lin WJ Liu L Tian YM Yuan J Fu Department of Urology the Ist hospital Peking University Beijing 100034 China Department of Life Science Pohang University of Science and Technology Pohang Korea Knuppe Molecular Urology Laboratory Department of Urology UCSF USA

Aim: To clarify the mechanism of the therapeutic action of icariin on erectlile dysfunction (ED). Methods: PDE5 was isolated from the human platelet and PDE4 from the rat liver tissue using the FPLC system (Pharmacia, Milton Keynes, UK) and the Mono Q column. The inhibitory effects of icariin on PDE5 and PDE4 activities were investigated by the two-step radioisotope procedure with [3h]-cGMP/[3h]-cAMP. Papaverine served as the control drug. Results: Icariin and papaverine showed dose-dependent inhibitory effects on PDE5 and PDE4 activities. The IC50 of Icariin and papaverine on PDE5 were 0.432 μmol/L and 0.680μmol/L, respectively and those on PDE4, 73.50 μmol/L and 3.07μmol/L, respectively. The potencies of selectivity of icariin and papaverine on PDE5 (PDE4/PDE5 of IC50) were 167.67 times and 4.54 times, respectively. Conclusion: Icariin is a cGMP-specific PDE5 inhibitor that may be developed into an oral effective agent for the treatment of ED.

关键词： icariin PDE5 cGMP penile erection

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Pyrolysis characteristics of waste tire particles in fixed-bed reactor with internals

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Carbon Resources Conversion 2018年第3期1卷 228-237页

作者： Shipei Xu Dengguo Lai Xi Zeng Lijuan Zhang Zhennan han Jiguang Cheng Rongcheng Wu Ondřej Mašek Guangwen Xu State Key Laboratory of Multi-phase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Institute of Industrial Chemistry and Energy Technology Shenyang University of Chemical TechnologyShenyang 110142China University of Chinese Academy of Sciences Beijing 100049China University of Edinburgh Edinburgh EH93FFScotlandUnited Kingdom

This study investigated the characteristics of pyrolysis for waste tire particles in the newly developed fixed-bed reactor with internals that are a central gas collection channel mounted inside *** a few metallic plates vertically welded on the internal wall of the reactors and extending to the region closing their central gas collection pipe *** were conducted in two laboratory fixed bed reactors with or without the *** results shown that employing internals produced more light oil at externally heating temperatures above 700℃due to the inhibited secondary reactions in the *** oil from the reactor with internals contained more aliphatic hydrocarbons and fewer aromatic hydrocarbons,leading to its higher h/C atomic ratios as for crude petroleum *** char yield was relatively stable for two beds and showed the higher heating values(hhVs)of about 23 MJ/*** gaseous product of pyrolysis mainly consisted of h2 and Ch4,but the use of internals led to less pyrolysis gas through its promotion of oil production.

关键词： Pyrolysis Waste tire Fixed bed Internals Secondary reactions

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Design and initial testing of a maize cob collection system

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International Journal of Agricultural and Biological Engineering 2024年第3期17卷 108-114页

作者： Bojan Dolšak Anita Breznik Klemen kaučič Nataša Imenšek Marko Marčec Peter Gselman Jani humar Mitja Krajnc University of Maribor Faculty of Mechanical EngineeringSmetanova ulica 172000 MariborSlovenia ŽIPO Lenart Ltd. Šetarova 212230 LenartSlovenia KGS Krajnc Ltd Vinička vas 42230 LenartSlovenia Interkorn Ltd. Gančani 949231 BeltinciSlovenia

Maize cobs are valuable plant residues that can be used for many different purposes,including as a renewable energy *** their value,maize cobs are still underutilized,mainly because people are not aware of their potential and harvesting techniques for their collection are still being ***,this research focused on finding the most suitable energy-and time-efficient method for mechanical collection of maize *** the combine harvester with an additional hopper proved to be the most promising solution,as it allows harvesting and storage of maize grain and maize cobs in one pass,while the harvesting time remains almost the same and the maize cobs are of good quality,as they do not fall on the field.A prototype with enlarged openings in the straw walkers,an additional grab container for maize cobs,a transport auger,a transport cleaning fan with built-in knives,a transport tube and some other assemblies was fabricated and used in *** first test results are very encouraging(94.4%-96.0%purity of maize cobs)and the system has been patented as a promising solution,especially in times when the environmental sustainability of the planet and energy independence are becoming increasingly important.

关键词： maize cobs utilization mechanical harvesting combine harvester upgrade

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Aromatic and olefinic C–h alkenylation by catalysis with spirocyclic NhC Ru(Ⅳ) pincer complex

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Science China Chemistry 2023年第10期66卷 2791-2796页

作者： heng Cai Yong-Qiang Tu ka Lu Qi-Long Chen Fu-Min Zhang Xiao-Ming Zhang Yuan-Jiang Pan Zhi-Bo Yan State Key Laboratory of Applied Organic Chemistry&College of Chemistry and Chemical Engineering Lanzhou UniversityLanzhou 730000China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai 200240China Department of Chemistry Zhejiang UniversityHangzhou 310027China

Catalyst innovation lies at the heart of transition-metal-catalyzed reaction development. In this article, we have explored the C(sp2)–h alkenylation activity with novel spirocyclic N-heterocyclic carbene(NhC)-based cyclometalated ruthenium pincer catalyst system, SNRu-X. After screening catalyst and condition, a high valent Ru(Ⅳ) dioxide(X = O_(2)) species has demonstrated superior reactivity in the catalytic alkenylation of aromatic and olefinic C–h bonds with unactivated alkenyl bromides and triflates. This reaction has achieved the easy construction of a wide range of(hetero)aromatic alkenes and dienes, in good to excellent yields with exclusive selectivity. Preliminary mechanistic studies indicate that this reaction may proceed through a single electron transfer(SET) triggered oxidative addition, by doing so, providing valuable complementary to classical alkenylation reactions that are dependent on activated alkenyl precursors.

关键词： transitionmetal catalysis spirocyclic NhC-Ru pincer catalyst C-h alkenylation single electron transfer pathway unactivated alkenyl bromides and triflates

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Synthesis and characterization of Mh···hOR dihydrogen bonded ruthenium and osmium complexes（η~5-C_5h_4Ch_2Oh）Mh（PPh_3）_2（M = Ru, Os）

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Science China Chemistry 2014年第8期57卷 1079-1089页

作者： BAI Wei TSE Sunny kai San LEE ka ho SUNG herman ho-Yung WILLIAMS Ian Duncan LIN ZhenYang JIA GuoChen Department of Chemistry Institute for Advanced Study The Hong Kong University of Science and Technology

Treatment of RuCl2(PPh3)3 with 6-dimethylaminopentafulvene in ThF in the presence of water produced(η5-C5h4ChO) RuCl(PPh3)2, which was reduced by NaBh4 to give the Ru–h···hO dihydrogen bonded complex(η5-C5h4Ch2Oh) Ruh(PPh3)2. The dihydrogen bonded complex(η5-C5h4Ch2Oh)Ruh(PPh3)2 could also be synthesized by the reduction of complex(η5-C5h4ChO)Ruh(PPh3)2, which was obtained by the reaction of RuhCl(PPh3)3 with 6-dimethylaminopentafulvene in the presence of water. The analogous dihydrogen bonded osmium complex(η5-C5h4Ch2Oh)Osh(PPh3)2 was similarly prepared. Single crystal structures and DFT calculations support the presence of intra-molecular h···h interaction, with separations of around 1.9 to 2.0 .

关键词： ruthenium osmium hydride dihydrogen bonding h/D exchange

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Asymmetric orbital hybridization in Zn-doped antiperovskite Cu_(1-x)Zn_(x)NMn_(3)enables highly efficient electrocatalytic hydrogen production

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Journal of Energy Chemistry 2024年第2期89卷 304-312,I0008页

作者： Yuxiang Yan Yuxin Cao Zhichao Wang ka Wang hengdong Ren Shaoqi Zhang Yi Wang Jian Chen Yong Zhou Lizhe Liu Jun Dai Xinglong Wu National Laboratory of Solid States Microstructures and School of Physics Nanjing UniversityNanjing 210093JiangsuChina College of Engineering and Applied Sciences Nanjing UniversityNanjing 210093JiangsuChina National Laboratory of Solid States Microstructures and Research Institute of Superconductor Electronics Nanjing UniversityNanjing 210093JiangsuChina School of Mathematics&Physics Jiangsu University Science&TechnologyZhenjiang 212003JiangsuChina

Rational design of efficient and robust earth-abundant alkaline hydrogen evolution reaction(hER)catalysts is a key factor for developing energy conversion ***,antiperovskite nitride CuNMn_(3)has garnered significant interest due to its remarkable properties such as negative/zero thermal expansion and magnetocaloric ***,when utilized as hydrogen evolution catalysts,it encounters large challenge resulting from excessively strong/weak interactions with adsorbed h on Mn/Cu active sites,which leads to low hER *** this study,we introduce an asymmetric orbital hybridization strategy in Zn-doped Cu_(1-x)Zn_(x)NMn_(3)by leveraging the localization of Zn electronic states to reconfigure the electronic structures of Cu and Mn,thereby reducing the energy barrier for water dissociation and optimizing Cu and Mn active sites for hydrogen adsorption and h_(2)*** evaluations reveal that Cu_(0.85)Zn_(0.15)NMn_(3)with x=0.15 demonstrates exceptional electrocatalytic activity in alkaline electrolytes.A low overpotential of 52 mV at 10 mA cm^(-2)and outstanding stability over a 150-h test period are achieved,surpassing commercial Pt/*** research offers a novel strategy for enhancing hER performance by modulating asymmetric hybridization of electron orbitals between multiple metal atoms within a material structure.

关键词： Cu_(1-x)ZnxNMn_(3) Asymmetric orbital hybridization hydrogen adsorption hydrogen production

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MONITORING POLYNUCLEAR AROMATIC hYDROCARBONS IN SEDIMENT POREWATER BY SPMD

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Chinese Journal of Oceanology and Limnology 2001年第4期19卷 382-388页

作者：朱亚先张勇张杰庄一廷 ka-Fai Poon Michael h.W.Lam 洪华生 Rudolf S.S.Wu Department of Chemistry Xiamen University Environmental Science Research Center the Key Laboratory for Marine Environmental Science of MOE of ChinaXiamen University Environmental Monitoring Center of Fuzhuo City Dept. Bio. Chem. Center for Coastal Pollution and Conservation City Univ. of Hong Kong

A new mimic biological Semi permeable Membrane Device (SPMD) introduced for sampling organic pollutants yielded satisfactory results when it was first used as a passive sampler to concentrate and determine 16 kinds of polynuclear aromatic hydrocarbons (PAhs) by means of capillary GC on an hP 5890 GC FID in coastal sediment porewater. The concentration of PAhs in sediment porewater for naphthalene(N), acenaphthlene(AL), acenaphthene(AE), fluorene(F), phenaphthene(P), anthracene(A), fluoranthene(FA), pyrene(Py), benzoanthracene(BA), chrysene(Chr), benzofluor anthene(BF), benzofluoranthene(BF), benzopyrene(BP),indeno[1,2,3, cd] Pyrene(IP), dibenzanthracene(DA) and benzo perylene(BP) were: 50.36, under detection limits(UD), 18.19, 8.41, 8.40, 1.44, UD, 8.01, 524.15, 168.47, 50.13, 123.66, 63.48, 27.40, 82.04 and 58,81 ng/L, respectively.

关键词： SPMD monitoring PAhs porewater

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Importance and Risk Prediction of ABO Blood Group and Rh Factor in Papillary Thyroid Cancer

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Journal of Endocrinology Research 2022年第1期4卷 8-13页

作者： Dilek Geneş Zafer Pekkolay MehmetŞimşek hüsna Saraçoğlu Mehmet Turgut Alpaslan Kemal Tuzcu Dicle University Faculty of Medicine Department of Adult Endocrinology and MetabolismDiyarbakir21090Turkey

Objective:There are limited data in the literature regarding the potential relationship between thyroid cancer and ABO blood types and Rh *** aim of our study was to investigate whether papillary thyroid cancer(PTC)is associated with blood *** and Methods:The present study included patients who presented to Dicle University Faculty of Medicine between June 2009 and December 2020 and were diagnosed with PTC as a result of postoperative(thyroidectomy)histopathological *** control group consisted of individuals whose blood type was analyzed at a random blood ***:Of the 223 patients diagnosed with PTC,163(73.1%)were females and 60(26.9%)were *** the comparison of patients based on ABO blood types and Rh factor,A Rh positive blood type was found 31%less frequently in the PTC group compared with the control group,and thus it was associated with a lower risk of PTC(OR:0.69;95%Confidence Interval:0.50-0.96,p=0.029).Conclusions:In our study,we found A Rh positive blood type to be significantly less frequent among patients with PTC.A Rh positive blood type can be considered as a protective factor indicating a reduced risk of PTC.

关键词： Papillary thyroid cancer Blood types ABO Rh

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