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Effects of the addition of complexants and bacteria on the soil-plant transfer at metal contaminated sites

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Chinese Journal Of Geochemistry 2006年第B8期25卷 89-89页

作者： manfred sager Hyo Taek Chon Jin Hee Park Austrian Agency for Health and Food Safety Competence Centre of Elements School of Civil Urban and Geosystem Engineering College of Engineering Seoul National University Korea Skin Research Institute AMOREPAC1F1C CORPORATION/R＆D CENTER Seoul Korea

Oil revenue and production cost disconnect and its impact on the environment:Economic globalization in Asia-Pacific economic cooperation countries

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Geoscience Frontiers 2024年第3期15卷 14-30页

作者： Zhou Li sager Alharthi Business School The University of New South WalesSydneyAustralia Business Administration Department College of Administrative and Financial SciencesSaudi Electronic UniversityJeddahKingdom of Saudi Arabia

The global economy relies heavily on oil production,but it is not without *** the period of economic globalization,the revenue and costs associated with oil production have become disjointed,which has had a detrimental effect on the *** a result,environmental protection has been compromised,environmental regulations have been weakened,natural resources have been exploited,and climate change has been *** study examines the impact of revenue minus the production cost of oil,energy use,and shadow economy on environmental degradation in APEC countries from 1991 to 2020,using the economic globalization index as a moderating *** result explains that revenue minus the oil production cost and the shadow economy are negatively associated with environmental *** use and economic globalization are positively associated with environmental degradation in APEC *** minus the production cost of oil and shadow economy improve the *** use and economic globalization degrade the environment in APEC *** are encouraged to advance technologies and upgrade infrastructure to reduce greenhouse gas emissions;also,promoting energy-efficient practices in other sectors,like transportation and manufacturing,could contribute to a healthier environment.

关键词： Greenhouse gas emissions Revenue minus production cost of oil Economic globalization Shadow economy APEC countries

Interlayer distance effects on absorption coefficient and refraction index change in p-type double-δ-doped GaAs quantum wells

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Chinese Physics B 2019年第12期28卷 186-190页

作者： H Noverola-Gamas L M Gaggero-sager O Oubram Instituto de Investigaciones en Ciencias Básicas y Aplicadas Universidad Autónoma del Estado de Morelos MorelosCuernavaca 62209Mexico Division Academica de Ingeniería y Arquitectura Universidad Juárez Autonoma de TabascoCunduacan 8660Mexico Centro de Investigación en Ingeniería y Ciencias Aplicadas Universidad Autónoma del Estado de MorelosCuernavaca 62209Mexico Facultad de Ciencias Químicas e Ingeniería Universidad Autónoma del Estado de MorelosCuernavaca 62209Mexico

In the framework of the Thomas–Fermi(TF) approach, a model for the p-type double-δ-doped(DDD) system in Ga As is presented. This model, unlike other works in the literature, takes into account that the Poisson equation associated with the system is nonlinear. The electronic structure is calculated for heavy and light holes. The changes in the electronic structure result of the distance d between the doped layers are studied. In particular, the relative absorption coefficient as well as the relative refractive index change is calculated as a function of the incident photon energy for heavy holes. The effect of the interlayer distance exhibits, in the absorption coefficient, a red shift of the peak position and a decrease in amplitude when the distance increases. In addition, the relative refractive index change node has a red shift as well as the interlayer distance increases. The calculations show that the effect of the separation between layers has a greater influence on the linear terms. These results are very important for theoretical calculations and engineering of optical and electronic devices based in δ-doped Ga As.

关键词： double delta-doping p-type GaAs layers electronic structure Thomas–Fermi approach nonlinear optical properties

Nonlinear optical properties in n-type quadrupleδ-doped GaAs quantum wells

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Chinese Physics B 2022年第4期31卷 348-351页

作者： Humberto Noverola-Gamas Luis Manuel Gaggero-sager Outmane Oubram Division Academica de Ingenierıa y Arquitectura Universidad Juarez Autonoma de TabascoCarretera Cunduacan-Jalpa de Mendez Km.1 Col.La EsmeraldaCunduacan8660Mexico Centro de Investigacion en Ingenierıa y Ciencias Aplicadas Universidad Autonoma del Estado de MorelosAv.Universidad 1001 Col.ChamilpaCuernavaca62209Mexico Facultad de Ciencias Quımicas e Ingenierıa Universidad Autonoma del Estado de MorelosAv.Universidad 1001 Col.ChamilpaCuernavaca62209Mexico

The effects of the interlayer distance on the nonlinear optical properties of n-type quadrupleδ-doped GaAs quantum well were theoretically ***,the absorption coefficient and the relative refraction index change were *** the effective mass approach and within the framework of the Thomas-Fermi theory,the Schrodinger equation was ***,the subband energy levels and their respective wave functions were *** variations in the nonlinear optical properties were determined by using the density matrix *** achieved results demonstrate that the interlayer distance causes optical red-shift on nonlinear optical ***,it can be deduced that the suitably chosen interlayer distance can be used to tune optical properties within the infrared spectrum region in optoelectronic devices such as far-infrared photo-detectors,high-speed electronic-optical modulators,and infrared lasers.

关键词： delta-doping n-type GaAs layers electronic structure non-linear optical properties

Ultrastructural cellular signatures: does cellular form follow function?

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National Science Review 2019年第5期6卷 861-863页

作者： manfred Auer Molecular Biophysics and Integrated Bioimaging Division Lawrence Berkeley National Laboratory

In his watershed 1896 essay The Tall Office Building Artistically Considered,protomodern architect Louis Sullivan famously declared that ‘form follows function’.Could this concept also hold true in biology? Have cel... 详细信息

关键词： Ultrastructural cellular signatures does cellular form follow function

Increased mortality in elderly heart failure patients receiving infusion of furosemide compared to elderly heart failure patients receiving bolus injection

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Journal of Geriatric Cardiology 2020年第6期17卷 359-364页

作者： Rana sager Isak Lindstedt Lars Edvinsson Marie-Louise Edvinsson Department of Emergency and Internal Medicine Lund University Hospital of SkåneSweden Department of Medicine Institute of Clinical Sciences in LundLund UniversitySweden

Heart failure(HF)is a condition of cardiac dysfunction and fluid *** activation via the reninangiotensin-aldosterone system and the sympathetic nervous system are the pathophysiological cornerstones.[1]Furthermore,HF is a disorder widely associated with grave adverse outcomes and poor prognosis.[2]A loop diuretic is the fundamental drug used to prevent multiorgan failure and improve symptoms in these patients.[3]

关键词： Furosemide Heart failure Infusion Injection Mortality

Melanoma development: stage-dependent cancer competence of the melanocytic lineage

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Signal Transduction and Targeted Therapy 2022年第1期7卷 13-14页

作者： manfred Kunz Department of Dermatology Venereology and AllergologyUniversity Medical Center LeipzigPhilipp-Rosenthal-Str.2304155 LeipzigGermany

In a recent article in Science,Baggiolini et al.^(1) showed that the transforming ability of the BRAFM6QQE oncogene for melanoma development depends on the stage of the transformed melanocyte lineage *** neural crest cells and melanoblasts are vulnerable to malignant transformation in a zebrafish model,melanocytes only developed small patches of nevus-like cells after BRARJ6QQE expression.

关键词： expression. al. melan

^(13)C analysis of cow tail hair and farm slurry can be used to implicitly distinguish between different dairy production systems

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Ecological Processes 2023年第1期12卷 98-109页

作者： Friederike Sieve Johannes Isselstein manfred Kayser Department of Crop Science Grassland ScienceGeorg-August University GöttingenVon-Siebold-Str.837075 GöttingenGermany Geo-Lab University of VechtaDriverstraße 2249377 VechtaGermany

Background Public interest in the way food is produced on the farm and processed along the food-production chain is *** analysis of isotopic signatures(^(13)C)in cow tail hair provides a method to reconstruct the dietary proportion of maize in cow *** on this,we further investigated whether there is a relationship between isotopic signatures in cow tail hair or farm slurry and the proportion of maize of the total utilized agricultural area per farm[%].We did an on-farm survey on 17 dairy farms in coastal Northwest Germany and collected cow tail hair from dairy cows and slurry samples on each *** farms differed in their feeding regime(C_(3) vs.C_(4) plants),their site conditions(sandy soil=‘Geestland’;organic soil=‘Peatland’;clayey soil=‘Marshland’),and in the area cultivated with maize as a proportion of the total utilized agricultural area per *** We found a positive relationship between δ^(13)C values in both cow tail hair and slurry and the annual dietary proportion of maize(R^(2)=0.67;and R^(2)=0.63).Furthermore,we confirmed that there was a relationship betweenδ^(13)C values in cow tail hair and area of maize as a proportion of the total utilized agricultural area per farm(R^(2)=0.69).Conclusion Our findings suggest a general applicability of using isotopic signatures(^(13)C)along a wide gradient of site conditions and productions systems in practice.

关键词： Stable isotopes Natural^(13)C abundance Environmental indicator Maize Dietary composition Traceability

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Exposure to sublethal concentration of flupyradifurone alters sexual behavior and cuticular hydrocarbon profile in Heriades truncorum,an oligolectic solitary bee

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Insect Science 2024年第3期31卷 859-869页

作者： Samuel Boff manfred Ayasse Institute of Evolutionary Ecology and Conservation Genomics Ulm UniversityUlmGermany

The aboveground oligolectic bee,Heriades truncorum,is a particularly good model for studying the impact of pesticides on sexual communication,since some aspects of its mating behavior have previously been *** have tested(1)the interference of the pesticide flupyradifurone on male precopulatory behavior and male mating partner preferences,(2)the way that the pesticide interferes in male quality assessment by the female,and(3)the effects of the pesticide on the chemical compounds in the female *** exposed bees of both sexes to a sublethal concentration of *** behaviors were registered in a mating arena with two females(one unexposed and one exposed)and one male(either unexposed or exposed).Unexposed males were quicker to attempt to *** also impacted precopulatory behavior and male quality assessment by *** approached unexposed females more quickly than insecticideexposed *** exposed to insecticide produced lower amounts of some cuticular hydrocarbons(sex pheromone candidates)and appeared less choosy than unexposed *** findings suggest that insecticide exposure affects sexual communication,playing a role both in male preference and in male quality assessment by the female.

关键词： courtship display female choice flupyradifurone male partner preference sex communication sublethal effects