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Effects of site productivity on individual tree maximum basal area growth rates of Eucalyptus pilularis in subtropical Australia

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Journal of Forestry Research 2023年第6期34卷 1659-1668页

作者： p.W.West Forest Research Centre Southern Cross UniversityLismoreNSW 2480Australia

Inventory data were available from 96 plots of even-aged,monoculture,tall-open forests of Eucalyptus pilularis Smith,aged 2-63 years,growing in sub-tropical regions along the east coast of Australia.A model was developed relating the maximum possible stem basal area growth rate of individual trees to their stem basal *** any tree size,this maximum increased as site productivity ***,the size at which this maximum occurred decreased as productivity *** research has shown that,at any stand age,trees of a particular stem basal area are taller on more productive sites than on less productive *** trees incur greater respiratory costs to ensure maintenance of the photo synthetic capacity of their canopies;this reduces their growth *** was concluded that trees with larger basal areas will have the maximum possible growth rate on a less productive site,whilst trees with smaller basal areas will have the maximum possible on a more productive *** model developed may constitute the first stage of a complete individual tree growth model system to predict wood yields from these forests.

关键词： Growth model Individual tree Maximum growth rate Eucalyptus pilularis physiological eff ects

Adhesion at friction and wear

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Friction 2022年第11期10卷 1859-1878页

作者： Dmitry p.MARKOV Research Institute of Railway Transport Moscow 129851Russia

Our understanding of the surrounding world,from friction to the origin of life,depends on how we imagine the contact interaction of condensed *** are the forces acting in contact with solids?Do they attract(adhesive)or repel(dehesive)?Theory and research at the atomic–molecular level have shown that the force are adhesive,but everyday experiences cast doubt on this *** article addresses this issue by considering the mistakes made in experimental and theoretical tribology and surface *** into account the theories of hybridization and dehybridization of electron orbitals and valence bonds,the views on the structure of the surfaces of condensed bodies and the force arising during contact interaction are *** influence of van der Waals,hydrogen,covalent,metallic,and ionic bonds on the properties of lubricants is *** contours of the dehesive–deformation theory of friction and wear are also outlined.

关键词： atomic and molecular interactions adhesion cohesion dehesion friction wear

Corrosion Inhibition of Leucaena Leucocephala pod on Mild Steel in Sulphuric Acid Solution

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Acta Metallurgica Sinica(English Letters) 2013年第4期26卷 416-424页

作者： p.Muthukrishnan B.Jeyaprabha p.prakash Department of Chemistry Thiagarajar College Department of Civil Engineering Fatima Michael College of Engineering & Technology

The corrosion of the mild steel in i mol/L H2SO4 was investigated using Leucaena leucocephala pod extract （LLpE） as corrosion inhibitor by weight loss and electrochemical techniques. Inhibition efficiency of 95% was achieved with 500×10^-6 of LLpE at 308 K. The polarization studies showed that LLpE acted as mixed type inhibitor. The adsorption of the studied inhibitor on mild steel obeyed Langmuir adsorption isotherm. protective film formation against acid attack was confirmed by FT-IR, XRD and SEM techniques.

关键词： Mild steel polarization SEM Acid corrosion XRD

Biohydrometallurgy applied to exploitation of black shale resources： Overview of Bioshale Fp6 European project

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中国有色金属学会会刊：英文版 2008年第6期18卷 1485-1490页

作者： p. D＇HUGUES p. SpOLAORE Bioshale Consortium BRGM EPI/Eco 3 Avenue C. Guillemin 45060 Orleans Cedex 2 France

Bioshale 工程，由欧洲委员会(Fp6 计划) 共同资助，在 2004 年 10 月开始了并且在 2007 年 10 月完成了。这个工程的主要目的是为黑页岩矿石的 eco 有效的利用定义创新 biotechnological 过程。黑页岩矿石包含贱、宝贵、高技术的金属... 详细信息

Bioshale 工程，由欧洲委员会(Fp6 计划) 共同资助，在 2004 年 10 月开始了并且在 2007 年 10 月完成了。这个工程的主要目的是为黑页岩矿石的 eco 有效的利用定义创新 biotechnological 过程。黑页岩矿石包含贱、宝贵、高技术的金属而且有机物的高内容由常规技术的那缺陷金属恢复。三世界级黑人页岩沉积物被选择为 R&D 行动的目标。这些包括在自然条件下面存在的一沉积物(Talvivaara，芬兰) ，一个当前在过程(Lubin，波兰) 并且在采矿以后的(Mansfeld，德国) 。工作计划的主要技术方面能如下被总结：忍受金属的部件的地质的资源和选择的评估；为金属恢复要测试的生物协会的选择；对 bioprocessing 的评价发送，包括为金属恢复处理的 hydrometallurgical；包括社会、环境的影响的新过程的 techno 经济的评估。13 欧洲人获得的主要结果的概述合伙(从 8 个国家) 在这个完成的研究计划包含了在这个工作被给。

关键词：生物技术生物浸取矿石处理黑页岩

Graphene's photonic and optoelectronic properties——A review

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Chinese physics B 2020年第3期29卷 13-35页

作者： A J Wirth-Lima p p Alves-Sousa W Bezerra-Fraga Department of physics Federal Institute of EducationScience and Technology of Ceara Campus SobralCearaBrazil postgraduate program in Electrical Engineering and Computing Federal University of Ceara(U.F.C.)Sobral CearaBrazil

Due to its remarkable electrical and optical properties,graphene continues to receive more and more attention from researchers around the *** excellent advantage of graphene is the possibility of controlling its charge density,and consequently,the management of its conductivity and dielectric constant,among other *** is noteworthy that the control of these properties enables the obtaining of new optical/electronic devices,which would not exist based on conventional ***,to work in this area of science,it is necessary to have a thorough knowledge regarding the electrical/optical properties of *** this review paper,we show these graphene properties very well detailed.

关键词： absorbance conductivity dielecric constant dispersion relation

Operating characteristics of a high radius pre-swirl cooling system

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航空动力学报 2007年第6期22卷 849-858页

作者： p.New p.R.N.Childs Rolls-Royce supported University Technology Centre in Aero-Thermal Systems University of SussexUK

An experimental investigation into pre-swirl effectiveness and receiver hole discharge coefficient characteristics for a high radius injection pre-swirl cooling systems was carried out on a physically representative experimental rig with a 450 mm diameter *** receiver holes and pre-swirl nozzle were located at a radius of 181 mm and 180 mm *** experimental work was mainly conducted at 5 000～12 000 r/min,4 bar absolute pressure and 1.132 kg/s air *** maximum air supply temperature was 190 ℃.pressure and temperature distributions in the pre-swirl system were examined with an emphasis on the velocity effectiveness of the pre-swirl system as a whole and on the discharge coefficients of the rotating 'receiver holes' in the *** results showed that the velocity effectiveness increased with increasing swirl ratio resulting in reduced blade cooling flow *** seal flow configurations caused very different effectiveness at different speeds,but outflow through the inner and outer seals always gave the highest effectiveness compared other *** the seal flow rate reduced the *** the coefficient of discharge,except for the low speed range,it increased with increase in swirl ratio for most speeds.

关键词：前漩涡冷却系统燃气涡轮速率流量系数

Advances in Microgeophysics for Engineering and Cultural Heritage

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Journal of China University of Geosciences 2009年第3期20卷 626-639页

作者： p L Cosentino p Capizzi G Fiandaca R Martorana p Messina Department of Chemistry and physics of the Earth and Applications to Geo-Resources and Natural Risks Geophysical Section University of PalermoPalermo Italy

A large number of unconventional investigations have been implemented, tested, and validated in the field of microgeophysics, with the aim being to solve specific diagnostic and/or monitoring problems regarding civil engineering and cultural heritage studies. The investigations were carried out using different tomographic 2D and 3D approaches as well as different energy sources, namely sonic, ultrasonic and electromagnetic （radar） waves, electric potential fields, and infrared thermography. Many efforts have been made to modify instruments and procedures in order to improve the resolution of the surveys as well as to greatly reduce the time of the measurements without any loss of information. The main new methodologies here discussed are the sonic imprint, the global tomographic traveltime, the electrical resistivity tomography, and the control of external films （patinas） grown on stone monuments. The results seem to be very promising and suggest that it is the moment to dedicate time and effort to this new branch of geophysics, so that these methodologies can be used even more to diagnose, monitor, and safeguard not only engineering buildings and large structures but also ancient monuments and cultural artifacts, like pottery, statues, etc..

关键词： microgeophysics engineering cultural heritage tomography electrical sonic ultrasonic ground penetrating radar (GpR).

Carbon capture for decarbonisation of energy-intensive industries:a comparative review of techno-economic feasibility of solid looping cycles

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Frontiers of Chemical Science and Engineering 2022年第9期16卷 1291-1317页

作者： Mónica p.S.Santos Dawid p.Hanak Energy and power School of WaterEnergy and EnvironmentCranfield UniversityBedfordshire MK430ALUK

Carbon capture and storage will play a crucial role in industrial ***,the current literature presents a large variability in the techno-economic feasibility of CO_(2)capture ***,reliable pathways for carbon capture deployment in energyintensive industries are still *** work provides a comprehensive review of the state-of-the-art CO_(2)capture technologies for decarbonisation of the iron and steel,cement,petroleum refining,and pulp and paper *** scrubbing was shown to be the least feasible option,resulting in the average avoided CO_(2)cost of between 62.7∈t_(CO_(2))^(-1)for the pulp and paper and 104.6∈t_(CO_(2))^(-1)for the iron and steel *** average equivalent energy requirement varied between 2.7(iron and steel)and 5.1MJ_(th)·kg_(CO_(2))^(-1)(cement).Retrofits of emerging calcium looping were shown to improve the overall viability of CO_(2)capture for industrial *** looping was shown to result in the average avoided CO_(2)cost of between 32.7(iron and steel)and 42.9(cement).Its average equivalent energy requirement varied between 2.0(iron and steel)and 3.7(pulp and paper).Such performance demonstrated the superiority of calcium looping for industrial *** work should focus on standardising the techno-economic assessment of technologies for industrial decarbonisation.

关键词： industrial CO_(2)emissions CCS deployment carbonate looping net-zero industry carbon capture benchmarks

Xenoesterogens and male infertility:myth or reality?

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Asian Journal of Andrology 2000年第4期2卷 263-269页

作者： Roya Rozati p.p.Reddy p.Reddanna Rubina Mujtaba Assisted Conception Services Unit Mahavir Hospital and Research Centre Hyderabad(A. P.) 500 028 IndiaInstitute of Genetics and Hospital for Genetic Diseases Hyderabad IndiaDepartment of Animal Sciences School of Life Sciences University of Hyderabad IndiaAssisted Conception Services Unit Mahavir Hospital and Research Centre Hyderabad(A. P.) 500 028 India

Aim: To evaluate the role of polychlorinated biphenyls (pCBs) as a potential environmental hazard in the deteriora-tion of male fertility. Methods: Fifty-three males were studied. After a thorough case history evaluation and rele-vant clinical and laboratory investigations, pCBs were estimated in the seminal plasma of 21 infertile men with 'Unex-plained Male Factor' and 32 fertile controls. peak retention times of the eluants were compared with those of the com-mercially available standard pCB Mix, and the results confirmed spectrophotometrically. Seminal pCB concentrafonswere compared between i) fertile and infertile men and ii) men from different areas and diets. The relationship betweenpCB concentrations and measures of sperm quality such as the total motile sperm count, was assessed. Results:pCBs were detected in seminal plasma of infertile men but absent from controls. Sperm quantity and quality were sig-nificantly lower in infertile men compared to controls. The highest average pCB concentrations were found in fish-eat-ing urban dwellers, and followed in succession by fish-eating rural dwellers, non fish-eating urban dwellers and nonfish-eating mral dwellers. The total motile sperm counts were inversely proportional to the pCB concentrations and weresignificantly lower than those of the respective controls. Conclusion: pCBs may be instrumental in the deteriorationof sperm quantity and quality, a contaminated fish diet being the main source of exposure.(Asian J Androl 2000 Dec; 2: 263-269 )

关键词： polychlorinated biphenyls xenoestrogens male infertility sperm