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Effects of Arsenic on Nutrient Accumulation and Distribution in Selected Ornamental Plants

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Agricultural Sciences 2015年第12期6卷 1513-1531页

作者： Stewart T. Reed Tomas Ayala-Silva Christopher B. Dunn Garry G. gordon USDA Agricultural Research Service Subtropical Horticulture Research Station Miami FL USA Department of Homeland Security U.S. Customs and Border Protection Miami Cargo Clearance Center Miami FL USA

In Miami, Florida, 95% of residential and 33% commercial soils exceed the Florida Department of Environmental Protection goals for cleanup of arsenic contamination. Ornamental plants have not been fully investigated as a mechanism for phytoremediation of low level As contaminated soil. This study evaluates nutrient uptake by ornamental plants grown in a hydroponic system containing concentrations of 0, 10, 20, 30, 40, 50 or 70 uM As (0.0, 0.75, 1.5, 3.0, 3.75, 5.25 mg·l-1 As, respectively). Uptake of Ca, K, Mg and Mo was likely influenced by the toxic effect of As on root functions. Arsenic had little effect on Ca, K and Mg transportation to the shoot at any but the highest As exposure rate. Tissue P concentration was similar to or higher than that found in controls and As competition with P uptake occurred at 70 uM As only. Tissue sulfur initially increased then subsequently decreased at 70 uM As where uptake could no longer supply enough S for both detoxification and normal metabolic needs. The effect of As on plant B was likely a result of membrane leakage and overall tissue damage leading to a reduction in transpiration. Arsenic induced Fe deficiency was likely the primary cause of chlorosis;however, As induced reduction in Zn, Mn or Mg contributed to chlorosis. Copper use in cellular functions was very efficient;nevertheless, Cu deficiency was one of the initial effects of As toxicity. Differences in mineral uptake reflect the plant’s attempt to detoxify As (i.e. increase in S for S-containing As chelators), mitigate damage to the cell (i.e. Ca to repair leaky menbranes) or continue cellular functions through alternative pathways (i.e. Fe superoxide dismutases to replace the function of Cu/ZnSOD).

关键词： Arsenic Micronutrients Secondary Nutrients Iris Marigold Sunflower Switchgrass

Evaluation of Growth Rate of Invasive Aquatic Macrophytes and Contribution to Its Use in Organic Fertilizer Production: A Case of Eicchornia crassipes (Mart.) Solms, 1883 in the lobé Creek (littoral-Cameroon)

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Open Journal of Ecology 2024年第7期14卷 571-583页

作者： Roland Didier Nwamo gordon Nwutih Ajonina Tapite Chanel Yamkou Kopmou Thomas Efole Ewoukem Minette Tomedi Eyango Department of Aquatic Ecosystems Management Institute of Fisheries and Aquatic Sciences at Yabassi University of Douala Douala Cameroon Cameroon Wildlife Conservation Society Mangrove & Coastal Wetlands Research Centre Mouanko Cameroon Department of Forestry Faculty of Agronomy and Agricultural Sciences University of Dschang Dschang Cameroon Department of Aquaculture Institute of Fisheries and Aquatic Sciences at Yabassi University of Douala Douala Cameroon

From 20 January to 20 July 2023, a study was carried out on the lobé Creek, a waterway subject to considerable natural and man-made pressures, with a negative impact on its biodiversity and habitats. The aim was to evaluate the growth rate of invasive aquatic macrophytes and their contribution to the use of organic fertilisers: a case of Eicchornia crassipes (Mart.) Solms, 1883 in the lobé Creek (littoral-Cameroon) with a view to its appropriate use in agronomy. The specific objective was to examine the impact of anthropogenic actions on lobé Creek, characterise physico-chemical environment of the study area, and evaluate the growth rate of E. crassipes and its chemical composition with a view to producing an organic biofertiliser. The results show that E. crassipes represents a considerable threat to the populations of these localities. As for the physico-chemical parameters, the temperature values vary from 24 ± 1.41˚C to 26.5 ± 1.13˚C;pH from 6.3 ± 0.1 to 7.2 ± 0.07;conductivity and dissolved oxygen vary respectively from 40.7 ± 1.83 µS/cm to 19.6 ± 3.11 µS/cm and from 7.3 ± 0.14 mg/l to 5.8 ± 1.55 mg/l. Its average growth rate varies from 0.69 feet/day to 0.63 feet/day. With regard to the nitrogen, phosphorus and potassium content of water hyacinth plants, the results show that the average total nitrogen content ranges from 6.11 ± 1.59 g/kg to 5.2 ± 2.03 g/kg;total phosphorus, from 0.52 ± 0.54 g/kg to 0.88 ± 0.38 g/kg;and potassium, from 1.43 ± 0.45 g/kg to 2.61 ± 0.89 g/kg.

关键词： Eichhornia crassipes lobé Creek Anthropogenic Actions Physico-Chemical Environment Growth Rate Chemical Composition

Components Qualification for the Safe Operation of Nuclear Power Plants

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Journal of Energy and Power Engineering 2016年第10期10卷 581-590页

作者： Holger Schmidt Martin Beetz Ingo Ganzmann Achim Beisiegel Thomas Wagner Christian Bonneau Darryl gordon Sun Jing AREVA GmbH-Thermal Hydraulics and Components Testing Paul-Gossenstr 100 Erlangen 91052 Germany ARE VA GmbH-Thermal Hydraulics and Components Testing Seligenstadter Strasse 100 Karlstein 63791 Germany AREVA SAS-Thermal Hydraulics and Components Testing 30 boulevard de l'Industrie Le Creusot 71205 France ARE VA Inc.-Thermal Hydraulics and Components Testing 3315 Old Forest Road Lynchburg VA 24501 USA Keysur International F11 Tower A Millennium Plaza No. 72 Beijing 100037 China

AREVA operates a world-wide unique thermal hydraulic platform to ensure high safety standards in the nuclear industries. This platform is operated as an accredited test and inspection body according to ISO 17025 and 17020 to grant a high and independently confmned quality standard. The accreditation also ensures the independency of the organization and confidentiality to the individual stakeholders, for example research centers, utilities, components suppliers, engineering companies and vendors. Especially for nuclear power plants, it is very relevant to consider that reliability depends on the integrity of its components during its life time-from design through construction, operation and maintenance. For example, a typical NPP （nuclear power plant） has 1,000 to 2,000 large valves and 7,500 to 12,500 small valves, of which about 200 to 400 are designated Safety Class 1. The qualification of these Safety Class 1 components is relevant for reactor new builds but also for installed plants. This paper explains newly established qualification tasks, the corresponding testing infrastructure, and the state of the art of testing technology. By way of example, the paper describes the program and possible sequence of qualifying NPP safety-related components.

关键词： Components testing nuclear qualification thermal hydraulics testing nuclear safety

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移植用胰岛细胞培养和贮存技术的回顾

国外医学.创伤与外科基本问题分册 1983年第1期 24-26页

作者： gordon DA 屠振兴

本文回顾评价胰腺组织和胰岛细胞的贮存技术应用于移植的有关问题。胰岛细胞培养的实验观察Andersson用TCM199、RPMI1640、CMRl1066等培养捷和血清,将小鼠胰岛置于37℃,含5％CO2的环境中培养7天,结论是:（1）在葡萄糖生理浓度（5.5mM/l... 详细信息

本文回顾评价胰腺组织和胰岛细胞的贮存技术应用于移植的有关问题。胰岛细胞培养的实验观察Andersson用TCM199、RPMI1640、CMRl1066等培养捷和血清,将小鼠胰岛置于37℃,含5％CO2的环境中培养7天,结论是:（1）在葡萄糖生理浓度（5.5mM/l）条件下培养,血清对胰岛保持正常的胰岛素效应与存活是必不可少的;（2）RPMI 1640刺激胰岛分泌胰岛素较其它培养基为优。成功的胰岛培养还有赖于所用的培养系统。Ferguson等用简单的器官培养系统保存小鼠、豚鼠和大鼠胰岛,发现pH降至6.8会

关键词：胰岛分泌血清抗生素葡萄糖右旋糖己糖胰岛细胞培养胰岛移植大鼠胰岛贮存技术胰岛素多肽

Optical coherence tomography for ocular surface and corneal diseases: a review

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Eye and Vision 2018年第1期5卷 126-136页

作者： Nandini Venkateswaran Anat Galor Jianhua Wang Carol l.Karp Bascom Palmer Eye Institute University of Miami Miller School of MedicineMcKnight Building Room 202A1638 NW 10th Avenue900 NW 17th StreetMiamiFL 33136USA Department of Ophthalmology Miami Veterans Administration Medical Center1201 NW 16th StreetMiamiFL 33125USA

The advent of optical coherence tomography(OCT)imaging has changed the way ophthalmologists image the ocular surface and anterior segment of the *** ability to obtain dynamic,high and ultra-high resolution,cross-sectional images of the ocular surface and anterior segment in a noninvasive and rapid manner allows for ease of *** this review,we focus on the use of anterior segment OCT,which provides an“optical biopsy”or in vivo imaging of various ocular surface and corneal pathologies,allowing the clinician to diagnose diseases otherwise not visualized by traditional *** utility of anterior segment OCT for various anterior segment pathologies is reviewed.

关键词： Anterior segment optical coherence tomography Ocular surface imaging Ocular surface lesions

Direct Current Interruption with RlC Circuit-convoluted Arc Interaction

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高电压技术 2013年第9期39卷 2166-2172页

作者： leonid M. Shpanin Noel Y. A. Shammas Sarath B. Tennakoon gordon R. Jones Jim E. Humphries Joseph W. Spencer Staffordshire University Stafford ST 180AD United Kingdom University of liverpool Liverpool L69 3G J United Kingdom

Investigations are reported into the use of an electromagnetically convoluted arc,external to a magnetic field(B-field)producing coil,in combination with a parallel R,l,C resonant circuit for interrupting quasi-steady *** order to elucidate the complex interactions between the arc,B-field and R,l,C circuit,the B-field producing coil is energised independently from the current to be interrupted and the R,l,C *** results are presented for the time variation of the currents flowing through the arc gap,the B-field coil and the parallel R,l,C circuit,along with the voltage across the arc *** insight is gained into the role of various effects,which are produced by the complex interactions and which might be used to advantage for direct current interruption.

关键词： RlC电路稳态电流中断相互作用调查报告谐振电路磁场线圈

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美国三级转诊中心的肝炎构成

世界核心医学期刊文摘（胃肠病学分册） 2005年第7期1卷 44-45页

作者： Galan M.V. Potts J.A. Silverman A.l. gordon S.C. 徐瑞 William Beaumont Hospital Div. of Gastroenterol. and Hepatol. 3601 West Thirteen Mile Road Royal Oak MI 48073 United States Dr.

Background/Goals: There are limited data regarding the frequency and proporti onality of drug- induced hepatotoxicity in the United States. We sought to dete rmine the scope of nonfulminant drug- induced hepatitis as seen in a community - based hepatology referral service. Study: From a population of 4,039 outpatie nts referred for evaluation of acute (n = 96) and chronic (n = 3,943) liver dise ase over a 10- year period, we reviewed the records of those patients diagnosed with acute bona fide drug- induced hepatitis. Results: Thirty- two patients p resented with self- limited acute drug- induced hepatitis, representing 0.8% of all hepatology patients and 33% of those patients presenting with acute li ver injury. Antibiotics (amoxicillin/clavulanic acid, minocycline, nitrofurantoi n, an investigational ketolide antibiotic, trimethoprim- sulfamethoxazole, and trovafloxacin) were the class of drugs most frequently implicated (14 of 32; 44 % ), while amiodarone was the single agent most commonly associated with liver injury (7 of 32; 22% ). The mean age of affected patients was 52.2 years, and w e found a male predominance (18 of 32; 56% ). The mean time to biochemical reso lution after discontinuation of the offending agent was 14.1 weeks. Conclusions: Drug- induced hepatitis is an uncommon entity in clinical hepatology but does represent a significant proportion of acute self- limited liver disease in the United States. Antibiotics and amiodarone were the most common drug culprits in our population. Time to resolution following the discontinuation of the offendin g agent may be protracted. Prospective studies are needed to further assess the burden of drug- induced liver injury.

关键词：慢性肝病患者自限性米诺四环素药物性肝损害肝脏疾病急性肝损害甲氧苄啶肝脏损害肝脏病呋喃妥因

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从药物预防糖尿病的DREAM试验中觉醒

英国医学杂志中文版 2007年第4期10卷 236-239页

作者： Victor M Montori William l Isley gordon H Guyatt 阳洪波（译）武力勇（校） Knowledge and Encounter Research Unit Department of Medicine Mayo Clinic College of Medicine Rochester MN USA Division of Endocrinology Diabetes Metabolism and Nutrition Mayo Clinic College of Medicine ClARITY Research Group Department of Biostatistics and Clinical Epidemiology and Department of Medicine Faculty of Health Sciences McMaster University Hamilton Ontario Canada 不详

生活方式改变和某些药物可以有效地预防糖尿病尚无试验表明药物预防糖尿病可改善患者的重要结局生活方式改变具有同样的有效性,但是更为安全。

关键词：防糖尿病 DREAM 药物觉醒试验流行趋势

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Decoupling the Electrical and Entropic Contributions to Energy Transfer from Infrared Radiation to a Power Generator

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World Journal of Condensed Matter Physics 2015年第4期5卷 301-318页

作者： Aidan l. gordon Yosyp Schwab Brian N. lang Graham P. Gearhart Tara R. Jobin Justin M. Kaczmar Zachary J. Marinelli Harkirat S. Mann Brian C. Utter Giovanna Scarel Department of Physics and Astronomy James Madison University Harrisonburg USA

The interaction between infrared radiation and a power generator device in time is studied as a route to harvest infrared, and possibly other electromagnetic radiations. Broadening the spectrum of the usable electromagnetic spectrum would greatly contribute to the renewable and sustainable energy sources available to humankind. In particular, low frequency and low power radiation is important for applications on ships, satellites, cars, personal backpacks, and, more generally, where non-dangerous energy is needed at all hours of the day, independent of weather conditions. In this work, we identify an electric and an entropic contribution to the energy transfer from low power infrared radiation to the power generator device, representing electrical and thermal contributions to the power generation. The electric contribution prevails, and is important because it offers multiple ways to increase the voltage produced. For example, placing black-colored gaffer tape on the illuminated face doubles the voltage produced, while the temperature difference, thus the entropic contribution, is not sensitive to the presence of the tape. We recognize the electric contribution through the fast changes it imparts to the voltage output of the power generator device, which mirror the instabilities in time of the infrared radiation. The device thus acts as sensor of the infrared radiation’s behavior in time. On the other hand, we distinguish the entropic contribution through the slow changes it causes to the voltage output of the power generator device, which reflect the relative delay with which the two faces of the device respond to thermal perturbations.

关键词： Infrared Power Generators Energy Harvesting Electric Contribution