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The influence of stocking levels,clone,fertilization,and weed control on surface CO_(2)efflux in a mid-rotation Pinus radiata *** plantation in Canterbury,New Zealand

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Journal of Forestry Research 2021年第6期32卷 2567-2575页

作者： Mohan KC Euan g.mason Horacio E.Bown School of Forestry University of CanterburyPrivate Bag 4800ChristchurchNew Zealand Ministry of Industry TourismForests and EnvironmentHetaudaBagmati ProvinceNepal Faculty of Forestry University of ChileP.O.Box 9206SantiagoChile

Silvicultural practices applied in managed forest plantations may help counteract the effects of climate change by influencing soil surface CO_(2)efflux(Fs).Understanding the effects of silvicultural practices on Fs will provide unbiased estimates of carbon fluxes and allow better silvicultural decisions for carbon ***,we assessed how Fs differed seasonally across silvicultural practices(i.e.,stocking levels,clone,fertilization and weed control treatments)and evaluated the effects of soil temperature(Ts)and soil volumetric water content(θv)on Fs across these practices for a mid-rotation(14 year-old)Pinus radiata plantation in the Canterbury region of New *** were significant differences in Fs(pg,and five *** effects of fertilization and weed control applied 12 years previously on Fs were *** estimate of Fs(mean±1 standard deviation)from the study site was 22.7±7.1 t ha^(-1)a^(-1)in the form of CO_(2)(6.2±2.1 t ha^(-1)a^(-1)in the form of C).Fs values were consistently higher in plots with 1250 stems ha^(-1)compared to 2500 stems ha^(-1),which may be related to a strong soil resource limitation because of the close spacing in the latter *** differences in Fs across clones suggest that variations in carbon partitioning might explain their growth *** treatments influenced Fs response to soil temperature(pg in models explaining 28-49%of the total variance in *** findings provide insights into how silvicultural management decisions may impact Fs in mid-rotation radiata pine plantations,contributing towards developing more precise and unbiased plantation carbon budgets.

关键词： Clone Silvicultural practices Soil CO_(2)efflux Stocking Weed control

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Phase behavior of rotationally asymmetric Brownian kites containing 90°internal angles

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Chinese Physics B 2021年第12期30卷 467-472页

作者： Huaqing Liu Yiwu Zong Zhanglin Hou Thomas g.mason Kun Zhao Key Laboratory of Systems Bioengineering(Ministry of Education) School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Wenzhou Institute University of Chinese Academy of SciencesWenzhou 325001China Department of Physics and Astronomy University of California-Los AngelesLos AngelesCA 90095USA Department of Chemistry and Biochemistry University of California-Los AngelesLos AngelesCA 90095USA Physics Department Tianjin UniversityTianjin 300072China

Previous Monte Carlo simulations have shown that ordered tetratic phases can emerge in a dense two-dimensional Brownian system of rotationally asymmetric hard kites having 90°internal ***,there have been no experimental investigations yet to compare with these simulation ***,we have fabricated two types of micron-sized kites having internal angles of 72°-90°-108°-90°and 72°-99°-90°-99°,respectively,and we have experimentally studied their phase behavior in two-dimensional *** and in contrast to the Monte Carlo simulations,the experimental results show a phase sequence of isotropic fluid-hexagonal rotator crystal-square crystal as the area fractionφA increases for both types of *** observed square crystal displays not only a quasi-long-range translational order but also(quasi-)long-range 4-fold bond-and molecular-orientational order;these characteristics confirm that tetratic order can emerge even in dense Brownian systems of rotationally asymmetric particles.A model based on local polymorphic configurations(LPCs)is proposed to understand the origin of the square lattice order in these dense kite *** results in this study provide a new route to realize custom-designed self-assembly of colloids by controlling LPCs.

关键词： tetratic order colloidal kites two-dimentional system phase behavior

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用安全无线广播信贷信息传送可收看付款数据的DBS系统

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通信保密 1986年第2期 57-63页

作者： A g mason 刘泽隆

一、前言这篇文章叙述了一种无线广播自动寻址(访问用户—译注)的限制出入的系统。这种系统非常可靠,而且对用户而言,该系统是透明的。本文着重强调了付款数据可收看(pay—per—view)的必要。并且指出所描述的加密系统能够起到这种重... 详细信息

一、前言这篇文章叙述了一种无线广播自动寻址(访问用户—译注)的限制出入的系统。这种系统非常可靠,而且对用户而言,该系统是透明的。本文着重强调了付款数据可收看(pay—per—view)的必要。并且指出所描述的加密系统能够起到这种重要的作用。

关键词：加密系统无线广播 DBS系统寻址周期时间比特数使用链服务系统比特位分组密码

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加压氧化处理方案的经济分析

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湿法冶金 1993年第4期12卷 50-57页

作者： P.g.mason 吕林

在对难处理金矿进行加压氧化预处理的合适工艺流程研究过程中,通常需要设想几种处理方案,本文探讨了与矿石组成有关的预富集和酸溶液循环,并基于北美的一般费用对此作了经济分析。

关键词：难处理金矿石加压氧化方案分析

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The Use and Exchange of Biological Control Agents for Food and Agriculture

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中国生物防治学报 2010年第S1期26卷 123-127页

作者： J.C.van Lenteren M.J.W.Cock J.Brodeur B.Barratt F.Bigler K.Bolckmans F.Haas P.g.mason J.R.P.Parra Laboratory of Entomology Wageningen UniversityP.O.Box80316700 EH WageningenNetherlands CABI Europe-Switzerland Rue des Grillons 1CH-2800 DelémontSwitzerland Institut de recherche en biologie végétale Universitéde Montréal4101rue Sher-brooke EstMontréal(Québec)Canada AgResearch Limited Invermay Agricultural CentrePuddle AlleyPrivate Bag 50034Mos-gielNew Zealand Agroscope Reckenholz-Tanikon Research Station ART Reckenholzstrasse 191CH-8046 ZurichSwitzerland Koppert B.V. Veilingweg 14Postbus 1552650 AD Berkel en RodenrijsThe Netherlands Icipe Duduville CampusKasaraniP.O.Box30772-00100NairobiKenya Agriculture and Agri-Food Canada Research CentreK.W.Neatby Building960 Carling AvenueOttawaOntario K1A0C6Canada Departamento de Entomologia Fitopatologia e Zoologia AgrícolaESALQ/USP.Caixa Postal0913418-900 Piracicaba-SPBrazil

The report sets out to summarize the past and current situation regarding the practice of biologicalcontrol inrelationtothe use and exchange of genetic resources relevant for *** considers the twomain categories of biological control:classical and *** access to BCAs for use inanother country imposes no risk of liability to the source *** scientific knowledge abouthabitats,fauna andflora,can be

关键词： The Use and Exchange of Biological Control Agents for Food and Agriculture

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用电分散法制备均一的乳濁液

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药学进展 1959年第1期 32-33页

作者： M.A.Nawab S.g.mason 王明时

最初曾有人用电分散法制得比較均一的气溶胶,为了要研究稀乳浊液的粘度而須制备稳定的、精确知道濃度的、均一的乳浊液,其他的方法都不适用,最近电分散法制备气溶胶的方法正在发展中。

关键词：乳浊液粗分散体系(化学) 电分散

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Challenges and opportunities in the production of magnesium parts by directed energy deposition processes

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Journal of Magnesium and Alloys 2024年第5期12卷 1663-1686页

作者： gürel Cam Ali günen Iskenderun Technical University Faculty of Engineering and Natural SciencesDepartment of Mechanical Engineering31200 Iskenderun-HatayTurkey Iskenderun Technical University Faculty of Engineering and Natural SciencesDepartment of Metallurgy and Materials Engineering31200 Iskenderun-HatayTurkey

Mg-alloys have gained considerable attention in recent years for their outstanding properties such as lightweight,high specific strength,and corrosion resistance,making them attractive for applications in medical,aerospace,automotive,and other transport ***,their widespread application is hindered by their low formability at room temperature due to limited slip *** Mg-alloys have low mechanical properties due to the presence of casting defects such as porosity and anisotropy in addition to the high *** casting methods benefit from established process optimization techniques for these problems,additive manufacturing methods are increasingly replacing casting methods in Mg alloys as they provide more precise control over the microstructure and allow specific grain orientations,potentially enabling easier optimization of anisotropy properties in certain *** metal additive manufacturing(MAM)technology also results in some manufacturing defects such as inhomogeneous microstructural evolution and porosity and additively manufactured Mg alloy parts exhibit lower properties than the wrought parts,they in general exhibit superior properties than the cast ***,MAM is a promising technique to produce Mg alloy *** energy deposition processes,particularly wire arc directed energy deposition(WA-DED),have emerged as an advantageous additive manufacturing(AM)technique for metallic materials including magnesium alloys,offering advantages such as high deposition rates,improved material efficiency,and reduced production costs compared to subtractive ***,the inherent challenges associated with magnesium,such as its high reactivity and susceptibility to oxidation,pose unique hurdles in the application of this *** review paper delves into the progress made in the application of DED technology to Mg-alloys,its challenges,and ***,the predominant imperfections,notably inhomo

关键词： Additive manufacturing DED processes Arc-DED Wire arc additive manufacturing(WAAM) 3-D printing High deposition rate

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Piling up multidecker pyrgos[n]cages as antibacterial materials

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Science China Materials 2024年

作者： Miguel A.Liuzzi-Vaamonde Jackson B.Lancaster Samantha A.mason Yuanning Feng Department of Chemistry and Biochemistry The University of Oklahoma

The development of antibiotics is regarded as one of the most significant scientific advances in modern *** the commercialization of antibiotics,infectious diseases were catastrophic throughout history[1].Penicillin was used to treat serious infections in the 1940s,but unfortunately,with the introduction of antibiotics came the emergence of antibiotic resistance[2,3].Evolved and adapted methicillin-resistant Staphylococcus aureus （MRSA） strains are presently impacting community and healthcare systems across the globe[4].

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Modified Atmospheric Packaging and Its Effect on Postharvest Cannabis Quality

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American Journal of Plant Sciences 2024年第3期15卷 222-234页

作者： Luke L. MacLaughlin mason T. MacDonald Department of Plant Food and Environmental Sciences Faculty of Agriculture Dalhousie University Halifax NS Canada

Cannabis sativa L. is used as fiber, food, and medicine in several countries. Though it is illegal for recreational use in most of the world, there are some countries that have legalized production and sale. There is a lot of research on production of cannabis, but less so on storage technologies. Cannabis contains several high value compounds, such as cannabinoids and terpenoids, that are susceptible to degradation via light, temperature, and oxygen. Several studies have explored temperature and light, and industry has adjusted accordingly. However, less is known about oxygen-induced degradation. Biochemical studies have demonstrated oxidative degradation of high value compounds, and many producers use some form of modified atmospheric packaging (MAP) for storage. However, the efficacy of MAP is unclear. The objective of this paper is to review our current understanding of MAP in postharvest cannabis storage and identify avenues where additional research is needed.

关键词： Cannabinoids Cannabis sativa Marijuana Nitrogen Packaging Oxidation Postharvest Terpenoids THC

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Recent research in mechanical properties of geopolymer-based ultrahigh-performance concrete:A review

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Defence Technology（防务技术） 2024年第2期32卷 67-88页

作者： g.Murali Division of Research&Innovation Uttaranchal UniversityDehradun 248007India

Due to the growing need for sustainable and ultra-high-strength construction materials,scientists have created an innovative ultra-high-performance concrete called geopolymer based ultra-highperformance concrete(gUHPC).Besides,in the last few decades,there have been a lot of explosions and ballistic attacks around the world,which have killed many civilians and fighters in border *** this context,this article reviews the fresh state and mechanical properties of ***,the ingredients of gUHPC and fresh properties such as setting time and flowability are briefly ***,the review of compressive strength,flexure strength,tensile strength and modulus of elasticity of fibrous ***,the blast and projectile impact resistance performance was ***,the microstructural characteristics were reviewed using the scanning electron microscope and X-ray Powder *** review outcome reveals that the mechanical properties were increased when 30%silica fume was added to a higher dose of steel fibre to improve the microstructure of *** is hypothesized that the brittleness of gUHPC was mitigated by adding 1.5%steel fibre reinforcement,which played a role in the decrease of contact explosion cratering and *** the need for cement in gUHPC was a key factor in the review,indicating a promising potential for lowering carbon ***,gUHPC research is still in its early stages,so more study is required before its full potential can be utilized.

关键词： Mechanical properties Blast Projectile impact Fibre geopolymer Silica fume Alkaline activators

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