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Quantitative model evaluation of organic carbon oxidation hypotheses for the Ediacaran Shuram carbon isotopic excursion

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Science China Earth Sciences 2017年第12期60卷 2118-2127页

作者： SHI Wei LI Chao thomas j.ALGEO State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Department of Geology University of Cincinnati

The largest global carbon-cycle perturbation in Earth history was recorded in the Ediacaran—a persistent negative shift in the global marine dissolved inorganic carbon(DIC) reservoir that lasted for ~25–50 million years, with a nadir of –12‰(i.e.,the Shuram Excursion, or SE). This event is considered to have been a result of full or partial oxidation of a large dissolved organic carbon(DOC) reservoir, which, if correct, provides evidence for massive DOC storage in the Ediacaran ocean owing to an intensive microbial carbon pump(MCP). However, this scenario was recently challenged by new hypotheses that relate the SE to oxidization of recycled continentally derived organic carbon or hydrocarbons from marine seeps. In order to test these competing hypotheses,this paper numerically simulates changes in global carbon cycle fluxes and isotopic compositions during the SE, revealing that:(1) given oxygen levels in the Ediacaran atmosphere-ocean of ≤40% PAL, the recycled continental organic carbon hypothesis and the full oxidation of oceanic DOC reservoir hypothesis are challenged by the atmospheric oxygen availability which would have been depleted in 4 and 6 million years, respectively;(2) the marine-seep hydrocarbon oxidation hypothesis is challenged by the exceedingly large hydrocarbon fluxes required to sustain the SE for >25 Myr; and(3) the heterogeneous(partial) DOC oxidation hypothesis is quantitatively able to account for the SE because the total amount of oxidants needed for partial oxidation(<50%)of the global DOC reservoir could have been met.

关键词： Carbon isotope Shuram Excursion Dissolved organic carbon Atmospheric oxygen Oceanic oxidation

The impact of macroalgae on mean and turbulent flow fields

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journal of Hydrodynamics 2015年第3期27卷 427-435页

作者： thomas Robert E. MCLELLAND Stuart j. Department of Geography Environment and Earth Sciences University of Hull

In this paper, we attempt to quantify the mean and turbulent flow fields around live macroalgae within a tidal inlet in Norway. Two Laminaria digitata specimens - 0.50 m apart were selected for detailed study and a profiling ADV was used to collect 45 velocity profiles, each composed of up to seven 0.035 m-high profiles collected for 240 s at 100 Hz, at a streamwise spacing of 0.25 m and cross-stream spacing of 0.20 m. To quantify the impact of the macroalgae, measurements were repeated over a sparser grid after the region had been completely cleared of algae and major roughness elements.

关键词： dealiasing laminaria digitata turbulence vectrino profiler velocity profile

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胰岛素最佳给药法

药学情报通讯 1989年第1期7卷 29-30页

作者： j.thomas 贾丹兵悉尼大学药学系

1921年Banting和Best根据激素缺乏的疾病可以通过给予激素来治疗,例如发现激素缺乏的甲状腺机能减退和肾上腺机能减退,由于相应激素的发现和应用已经有效地“治愈”,他们据此经验发现了胰岛素治疗糖尿病,据信糖尿病的治疗已经解决。然... 详细信息

1921年Banting和Best根据激素缺乏的疾病可以通过给予激素来治疗,例如发现激素缺乏的甲状腺机能减退和肾上腺机能减退,由于相应激素的发现和应用已经有效地“治愈”,他们据此经验发现了胰岛素治疗糖尿病,据信糖尿病的治疗已经解决。然而治疗糖尿病并不这样简单,从1921年以来对治疗糖尿病人提供胰岛素曾做出了很大的努力,以求纠正此病的代谢异常。为了获得简单的胰岛素治疗糖尿病为什么不是最佳方法的道理。

关键词：胰岛素给药法

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肾结石的草酸尿

昆明医学院学报 1984年第S3期 16-20页

作者： j.thomas 邓士贤

肾结石中草酸钙的量几乎占60—70％,草酸结晶的重要性乃草酸代谢不正常的问题,经常被提出来。犹如尿结石及痛风存在着草酸代谢的紊乱一样,根据作者收集的病例中40—60％已确知肾结石存在有钙代谢的紊乱,并发现有高钙尿的现象。草酸的问... 详细信息

肾结石中草酸钙的量几乎占60—70％,草酸结晶的重要性乃草酸代谢不正常的问题,经常被提出来。犹如尿结石及痛风存在着草酸代谢的紊乱一样,根据作者收集的病例中40—60％已确知肾结石存在有钙代谢的紊乱,并发现有高钙尿的现象。草酸的问题比较复杂,近几年来巳获得有较明确的定量。

关键词：草酸尿草酸结石病例结石病人草酸钙结晶肾结石肾石病

Evaluation of a model for providing cost effective,accessible continuing education to the forensic science community

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Forensic Sciences Research 2021年第4期6卷 224-230页

作者： thomas j.Gluodenis Department of chemistry&Physics Lincoln UniversityLincoln UniversityPAUSA

This study presents a detailed model and its subsequent assessment for the development and optimized delivery of continuing education for the forensic science *** continuing education is on the rise as this modality of content dissemination allows for accessibility,convenience,and *** model,which includes an educational needs assessment,gap analysis,online content delivery and archival,was evaluated through the launch of a global training event/symposium *** four-year study of over 6000 participants representing>75 countries provides empirical support for the model based upon registration/attendance data and participant self-assessment *** practices are identified relative to content and format,operational excellence,technology,and financing of the *** directions along with opportunities to further enhance the model are also discussed.

关键词： Forensic sciences continuing education educational requirements online web-based certification

Solid-state emissive biphenylene bridged bisaroyl-S,N-ketene acetals as distinct aggregation-induced enhanced emitters and fluorometric probes

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Aggregate

Aggregate 2021年第5期2卷 179-184页

作者： Lukas Biesen thomas j.j.Muller Institut fur Organische und Makromolekulare Chemie Heinrich-Heine-Universitat DusseldorfDüsseldorfGermany

Biphenylene bridged bisaroyl-S,N-ketene acetals can be readily synthesized by a one-pot Masuda borylation-Suzuki arylation sequence,thus,yielding a library of 20 bisaroyl-S,N-ketene acetals with tunable solid-state emission and aggregationinduced enhanced emission characteristics depending on the para substituents in the starting *** applications as fluorometric probe of alcoholic beverages are outlined.

关键词： aggregation-induced emission aroyl-S N-ketene acetals liquor sensors one-pot reaction solid-state

Patient selection essential in optimizing the benefit of radical prostatectomy for patients with organ-confined prostate cancer

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Asian journal of Andrology 2011年第6期13卷 789-790页

作者： Matthew j Resnick thomas j Guzzo The Division of Urology The Hospital of the University of Pennsylvania Philadelphia PA 19104 USA

P rostate cancer is the most common noncutaneous malignancy in the United States and is a highly prevalent disease worldwide in industrialized nations.1 Prostate cancer is also a leading cause of cancer related mortality in the United States with an estimated 32 050 deaths in 2010. If one were to simply look at the raw mortality data,

关键词： Biological sciences Genetics Medical research

Optoelectronic and electrochemical behaviour of γ-CuI thin films prepared by solid iodination process

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Progress in Natural Science:Materials International 2019年第5期29卷 533-540页

作者： Karthik Kumar Chinnakutti Vengatesh Panneerselvam Durai Govindarajan ajith kumar Soman Kuppusami Parasuraman Shyju Thankaraj Salammal Centre of Excellence for Energy Research Sathyabama Institute of Science and Technology Centre for Nanoscience and Nanotechnology Sathyabama Institute of Science and Technology

A simple and efficient solid iodination method has been proposed for the fabrication of p-type γ-CuI thin *** structural,morphological,optical,electrical and electrochemical properties have been investigated in order to serve as an effective hole-transporting layer in solid-state solar *** fabricated films exhibited p-type conductivity with resistivity of 7.0×10;Ωcm,the hole concentration of ～1.13×10;cm;and the mobility of 18.34 cm;V;s;.The cyclic voltammetry result shows a maximum specific capacitance of 43 mF/cm;at a scan rate of 10 mV/*** cyclic stability and capacitance retention were found to be 99.7%.These findings demonstrate that γ-CuI film can be a potential candidate for multiple applications,such as a hole transporting material for solid-state solar cells and electrochemical supercapacitor.

关键词： Copper iodide Solid iodination Hole mobility Cyclic voltammetry

Neuromodulator interactions and spinal cord injury in lamprey

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Neural Regeneration Research 2018年第4期13卷 643-644页

作者： David Parker thomas j.McClelland Department of Physiology Neuroscience and DevelopmentUniversity of Cambridge

Neuromodulation is mediated by neurotransmitters that typically act on G-protein-coupled *** can confer behavioural flexibility by modifying the functional properties of anatomically hard-wired neural *** neuromodulators generally have divergent cellular and synaptic effects（Harris-Warrick and johnson,2010）,and different modulators,

关键词： Figure Neuromodulator interactions and spinal cord injury in lamprey