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Phosphoinositides:Emerging players in plant salinity stress tolerance

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Molecular Plant 2021年第12期14卷 1973-1975页

作者： Sergey Shabala Min Yu International Research Centre for Environmental Membrane Biology Foshan UniversityFoshan 528041China tasmanian Institute of Agriculture University of TasmaniaHobartTas 7001Australia

Soil salinity reduces the biodiversity of natural ecosystems and severely limits sustainability and profitability of agricultural pro-duction *** the increasing reliance of modern agricul-ture on irrigation(Liu et al.,2020a),the extent of the soil salinity is only going to increase under current climate trends *** this context,achieving global food security in the 21 st century will be not feasible without developing a salt-tolerant crop ***,the physiological and genetic complexity of this trait has significantly handicapped progress in the field.

关键词： soil salinity germplasm

Hybrid finite-discrete element modelling of asperity degradation and gouge grinding during direct shearing of rough rock joints

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International Journal of Coal Science & Technology 2016年第3期3卷 295-310页

作者： H. Y. Liu Haoyu Han H. M. An J. J. Shi School of Engineering and ICT University of TasmaniaHobart TAS 7001 Australia School of Civil & Environmental Engineering University ofScience and Technology Beijing Beijing China

A hybrid finite-discrete element method was implemented to study the fracture process of rough rock joints under direct shearing. The hybrid method reproduced the joint shear resistance evolution process from asperity sliding to degradation and from gouge formation to grinding. It is found that, in the direct shear test of rough rock joints under constant normal displacement loading conditions, higher shearing rate promotes the asperity degradation but constraints the volume dilation, which then results in higher peak shear resistance, more gouge formation and grinding, and smoother new joint surfaces. Moreover, it is found that the joint roughness affects the joint shear resistance evolution through influencing the joint fracture micro mechanism. The asperity degradation and gouge grinding are the main failure micro-mechanism in shearing rougher rock joints with deeper asperities while the asperity sliding is the main failure micro-mechanism in shearing smoother rock joints with shallower asperities. It is concluded that the hybrid finite-discrete element method is a valuable numerical tool better than traditional finite element method and discrete element method for modelling the joint sliding, asperity degradation, gouge formation, and gouge grinding occurred in the direct shear tests of rough rock joints.

关键词： Hybrid FEM-DEM Rock joint Asperity sliding Asperity shearing Fragment grinding

LIQUID-GAS TWO PHASE FLOW RATES METERING BY DUAL PRESSURE DIFFERENTIAL MEASUREMENTS

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Journal of Hydrodynamics 1994年第3期6卷 85-96页

作者： M.R.Davis Dept of Civil and Mechanical Engineering University of TasmaniaG.P.O.Box 252cHobartTasmania 7001Australia

The measurement of the overall mass flow rates in a two phase, gas/liquid pipeline is considered on the basis of dual pressure differential measurements for a combined contraction/frictional pipe type of flow meter and a numerical model to predict overall mass flow rates from pressure differentials measured from this type of flow meter is presented. The experiments generally conform with the predictions of the flow rates prediction model. Whilst the practicability of such metering of two phase flows is clearly demonstrated, application of the method would require careful calibration to allow for the influence of nozzle coefficients, pipe Reynolds number and void fraction upon the one dimensional compressible flow equations through wall friction factor and interphase slip effects.

关键词： two phase flow measurement pressure differential.

Adult myelination: wrapping up neuronal plasticity

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Neural Regeneration Research 2014年第13期9卷 1261-1264页

作者： Megan O’Rourke Robert Gasperini Kaylene M.Young Menzies Research Institute tasmania University of Tasmania The School of Medicine University of Tasmania

In this review, we outline the major neural plasticity mechanisms that have been identified in the adult central nervous system （CNS）, and offer a perspective on how they regulate CNS function. In particular we examine how myelin plasticity can operate alongside neurogenesis and synaptic plasticity to influence information processing and transfer in the mature CNS.

关键词： oligodendrocyte OPC adult central nerrous system NG2 oligodendrogenesis plasticity remodelling myelination neural stem cells synapse

What are the evolutionary origins of stomatal responses to abscisic acid in land plants?

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Journal of Integrative Plant Biology 2017年第4期59卷 240-260页

作者： Frances C. Sussmilch Timothy J. Brodribb Scott A. M. McAdam School of Biological Sciences University of Tasmania Hobart Tasmania Australia

The evolution of active stomatal closure in response to leaf water deficit, mediated by the hormone abscisic acid （ABA）, has been the subject of recent debate. Two different models for the timing of the evolution of this response recur in the literature. A single-step model for stomatal control suggests that stomata evolved active, ABA- mediated control of stomatal aperture, when these structures first appeared, prior bryophyte and vascular plant gradualistic model for stomatal to the divergence of neages. In contrast, a control proposes that the most basal vascular plant stomata responded passively to changes in leaf water status. This model suggests that active ABA-driven mechanisms for stomatal responses to water status instead evolved after the divergence of seed plants, culminating in the complex, ABA-mediated responses observed in modern angiosperms. Here we review the findings that form the basis for these two models, including recent work that provides critical molecular insights into resolving this intriguing debate, and find strong evidence to support a gradualistic model for stomatal evolution.

关键词： ABA What are the evolutionary origins of stomatal responses to abscisic acid in land plants acid

澳洲塔斯马尼亚霍巴特冬季驯化黄翅澳蜜鸟的代谢率(英文)

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动物学报 2005年第2期51卷 338-343页

作者： L.P.E.Kusuma YUNI R.W.ROSE School of Zoology University of TasmaniaPrivate Bag 5GPO HobartTasmania Australia 7001School of Zoology University of TasmaniaPrivate Bag 5GPO HobartTasmania Australia 7001

在5-40°C温度范围内, 测定了澳大利亚塔斯马尼亚黄翅澳蜜鸟(Phylidonyris novaehollandiae) (平均体重24 .1 ±0. 27 g) 冬季的耗氧量。结果表明, 热中性区是25-35°C。基础代谢率是4. 92 ±0 .14 ml/g. h,分别比Lasiewski and Dawson... 详细信息

在5-40°C温度范围内, 测定了澳大利亚塔斯马尼亚黄翅澳蜜鸟(Phylidonyris novaehollandiae) (平均体重24 .1 ±0. 27 g) 冬季的耗氧量。结果表明, 热中性区是25-35°C。基础代谢率是4. 92 ±0 .14 ml/g. h,分别比Lasiewski and Dawson (1967) 和Aschoff and Pohl (1970) 基于体重的关于雀型鸟类的期望值高57%和77%。本研究结果同样也比已经报道的分布在澳洲大陆的该物种的代谢率高。

关键词：塔斯马尼亚冬季驯化黄翅澳蜜鸟代谢率澳大利亚

SIMULATED THERMAL ALTERATION OF STEROLS AND KETO-ALCOHOLS IN MARINE SEDIMENTS OF THE OKINAWA TROUGH

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Chinese Journal of Oceanology and Limnology 1993年第4期11卷 343-350页

作者：姜善春 John K.Volkman Teresa O'Leary 张惠之栾作峰 Guangzhou Branch of Institute of Geochemistry Academia Sinica Guangzhou 510640 CSIRO Division of Oceanography Hobart Tasmania Australia 7001 Institute of Oceanology Academia SinicaQingdao 266071

Compositional data on the sterol and alcohol fractions isolated from deep-sea marine sediments from the Okinawa Trough were obtained to determine the relative contribution from. marine and terrestrial inputs. Following extraction, the sterol plus alcohol fraction was isolated by layer chromatography, derivatized with BSTFA and then analysed by capillary GC and GC-MS. A suite of C26-C29 stenols and stanols and C30-C32 keto - alcohols were identified in the sediments. The thermal stability of the compounds in these sediments was studied by heating portions of the surface sediment in glass tubes fpr 16 hours at temperatures from 50℃ to 200℃.The C27 stanol/stenol ratio increased when temperatures went up to 175℃ , but the distribution of C30-C32 Keto - alcohols remained unaffected. At 200℃ most of the sterols and Keto - alcohols were destroyed.

关键词： sterols ketq -alcohols, thermal alteration, Okinawa Trough

A wavelet transform method for studying the energy distribution characteristics of microseismicities associated rock failure

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Journal of Traffic and Transportation Engineering(English Edition) 2019年第6期6卷 631-646页

作者： Yumei Kang Hongyuan Liu Md Maniruzzaman A.Aziz Khairul Anuar Kassim College of Resources and Civil Engineering Northeastern UniversityShenyang 110004China School of Engineering University of TasmaniaHobartTAS 7001Australia Faculty of Civil Engineering Universiti Teknologi Malaysia81310 SkudaiJohorMalaysia

Microseismicity signals released during rock failure process are firstly recorded using microseismicity monitoring system.A wavelet transform scheme is then developed on the basis of the discrete wavelet transform and implemented into MATLAB to study the energy distribution characteristics of the monitored microseismicity *** wavelet transform scheme decomposes the recorded microseismicity signals into various wavelets at seven scales and eight frequency *** microseismicity energy at each frequency band is then calculated by integrating the wavelets in each *** is found that,for the microseismicity signals recorded during the uniaxial loading of the granite,the microseismicity energies are mainly distributed between the bands 7.8125-15.625 kHz,15.625-31.250 kHz and 31.25-62.5 kHz and the percentages of the released energies at these frequency bands are 8.24%,62.72%,28.08% of the total energies,*** results reveal that the microseismicity energies at these levels are directly related to the damage mechanisms of the granite although further studies are need to identify the failure *** these monitored signals were processed using wavelet transformation to find out the frequency distribution rule and the frequency band energy varying rule of the acoustic emission(AE) signals during the different rock damage and failure *** rock failure mechanism was interpreted from the perspective of the relationship between AE signal frequency change and crack *** frequency band energy distribution histograms of the microseismicity signals at different damage stages were computed and drawn by the energy calculation method of wavelet transformation implemented into *** energy percentage of the low frequency band(d7-a7) and that of the dominated frequency band(d4-d6) and their variation rule were analyzed ***,the critical damage point is that the low frequency energy percentage is above a certain threshol

关键词： Microseismicity signal Rock fracture Wavelet transform Band energy Grack

Geochemical characteristics and zones of surface snow on east Antarctic Ice Sheet

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Chinese Science Bulletin 2004年第20期49卷 2205-2211页

作者： KANGJiancheng LIULeibao QINDahe WANGDali WENJiahong TANDejun LIZhongqin LIJun ZHANGXiaowei PolarResearchInstituteofChina Shanghai200129China ColdandAridRegionsEnvironmentalandEngineeringResearchInstitute.ChineseAcademyofSciences.Lanzhou730000.China AustralianAntarcticDivisionandAntarcticClimateandEcosystemsCRC.PrivateBag80Hobart.tasmania.7001.Australia GeographyDepartmentofLanzhouUniversity.Lanzhou730000.China

The surface-snow geochemical characteristics are discussed on the East Antarctic Ice Sheet, depending on the stable isotopes ratios of oxygen and hydrogen, concentra-tion of impurities (soluble-ions and insoluble micro-particle) in surface snow collected on the ice sheet. The purpose is to study geochemical zones on the East Antarctic Ice Sheet and to research sources and transportation route of the water vapor and the impurities in surface snow. It has been found that the ratio coefficients, as S1, d1 in the equation dD = S1d18O + d1, are changed near the elevation 2000 m on the ice sheet. The weight ratio of Cl-/Na+ at the area below the ele-vation of 2000 m is close to the ratio in the sea salt; but it is about 2 times that of the sea salt, at the inland area up to the elevation of 2000 m. The concentrations of non-sea-salt Ca2+ ion (nssCa2+) and fine-particle increase at the interior up to the elevation 2000 m. At the region below the elevation of 2000 m, the impurity concentration is decreasing with the elevation increasing. Near coastal region, the surface snow has a high concentration of impurity, where the elevation is below 800 m. Combining the translating processes of wa-ter-vapor and impurities, it suggests that the region up to the elevation 2000 m is affected by large-scale circulation with longitude-direction, and that water-vapor and impurities in surface snow come from long sources. The region below the elevation 2000 m is affected by some strong cyclones acting at peripheral region of the ice sheet, and the sources of water and impurities could be at high latitude sea and coast. The area below elevation 800 m is affected by local coastal cy-clones.

关键词：地球化学表征地面土壤南极冰原雪地球化学带