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Relations between mercury fractions and microbial community components in seawater under the presence and absence of probable phosphorus limitation conditions

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Journal of Environmental Sciences 2019年第1期31卷 145-162页

作者： Igor ?ivkovi? Vesna Fajon Jo?e Kotnik Yaroslav Shlyapnikov Kristina Obu Vazner Ermira Begu Stefanija ?estanovi? Danijela ?anti? Ana Vrdoljak Slaven Jozi? Mladen ?oli? Jelena Lu?i? Jere Ve?a Grozdan Ku?pili? Marin Ordulj Frano Mati? Branka Grbec Natalia Bojani? ?ivana Nin?evi? Gladan Milena Horvat Department of Environmental Sciences Jo?ef Stefan Institute Jo?ef Stefan International Postgraduate School Ecological Engineering Institute Maribor 2000 Slovenia Laboratory of Marine Microbiology Institute of Oceanography and FisheriesSplit 21000 Croatia Laboratory of Chemical Oceanography and Sedimentology of the Sea Institute of Oceanography and FisheriesSplit 21000 Croatia Laboratory of Chemical Oceanography and Sedimentology of the Sea Institute of Oceanography and Fisheries Department of Marine Studies University of SplitSplit 21000 Croatia Laboratory of Physical Oceanography Institute of Oceanography and FisheriesSplit 21000 Croatia Laboratory of Plankton and Shellfish Toxicity Institute of Oceanography and FisheriesSplit 21000 Croatia

Microbial transformations of toxic monomethylmercury(MMHg) and dissolved gaseous mercury(DGM) at the lower levels of the marine food web are not well understood, especially in oligotrophic and phosphorus-limited seas. To examine the effects of probable phosphorus limitation(~PP-limitation) on relations between mercury(Hg) fractions and microorganisms, we determined the total mercury(THg), total methylated mercury(MeHg), DGM, and microbiological and chemical parameters in the Central Adriatic Sea. Using statistical analysis, we assessed the potential microbial effects on Hg transformations and bioaccumulation. Only in the absence of ~PP-limitation conditions(^(NO–P)P-limitation) is MeHg significantly related to most chemical and microbial parameters, indicating metabolism-dependent Hg *** heterotrophic activity of low nucleic acid bacteria(abundant in oligotrophic regions)seems responsible for most of Hg methylation under ^(NO–P)P-limitation. Under these conditions,DGM is strongly related to microbial fractions and chlorophyll a, indicating biological DGM production, which is probably not metabolically induced, as most of these relations are also observed underPP-limitation. MMHg biomagnification was observed through an increased bioaccumulation factor from microseston to mesozooplankton. Our results indicate that Hgtransformations and uptake might be enhanced under ^(NO–P)P-limitation conditions, emphasizing their impact on the transfer of Hg to higher trophic levels.

关键词： Mercury speciation Methylmercury probable phosphorus limitation Microbial community

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probable benign paroxysmal positional vertigo, spontaneously resolved:Incidence in medical practice, patients’ characteristics and the natural course

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Journal of Otology 2019年第3期14卷 111-116页

作者： M.G.Alvarez-Morujo de Sande R. Gonzalez-Aguado G. Guerra-Jimenez E. Domenech-Vadillo H. Galera-Ruiz E. Figuerola-Massana A. Ramos-Macías C. Morales-Angulo A.J. Martín-Mateos E. Domínguez-Duran Hospital Universitario Puerta del Mar Cadiz Spain Hospital Universitario Marques de Valdecilla Santander Spain Complejo Hospitalario Universitario Insular Materno-Infantil Las Palmas de Gran Canaria Spain Hospital Universitari Joan XXIII Tarragona Spain Hospital Infanta Luisa Sevilla Spain

Background: probable benign paroxysmal positional vertigo, spontaneously resolved (pBPPVsr), is a variant of benign paroxysmal positional vertigo (BPPV) in which there is no observable nystagmus and no vertigo with any positional maneuver. Objectives: To calculate the incidence pBPPVsr, compare the characteristics of the patients with pBPPVsr and BPPV not spontaneously resolved and describe the spontaneous resolution in the natural course of BPPV. Methods: Multicenter prospective descriptive study. During a one-year period, all patients with suspected BPPV that presented to the Neurotology Units of five participating centers were recruited. The incidence of pBPPVsr was calculated as a percentage of the total number of patients with BPPV. The prevalence of several variables was compared between pBPPVsr and BPPV not spontaneously resolved. The timing of spontaneous resolution was estimated using Kaplan-Meier curves. Results: 457 patients met the inclusion criteria. The incidence of pBPPVsr was 33.5%. It was significantly higher in males, in patients with normal bone mass and in patients who were not taking sulpiride. A rate of 18% of spontaneous resolution after the first month and 51% after the first year was found. This percentage did not change in a significant way after this moment. The curves for males, patients under 50 and patients with normal blood pressure decreased significantly faster. Conclusions: In our serie, BPPV spontaneously resolved in half of the patients with BPPV during the first year. This seemed to occur more commonly in males and could have been hindered by sulpiride intake, osteoporosis, advanced age and high blood pressure.

关键词： Benign paroxysmal positional vertigo probable benign paroxysmal positional vertigo, spontaneously resolved Osteoporosis Sulpiride Hypertension

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Time-Consistent Asymptotic Exponential Arbitrage with Small probable Maximum Loss

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Chinese Annals of Mathematics,Series B 2019年第4期40卷 495-500页

作者： Jinfeng LI School of Management Fudan University

Based on a concept of asymptotic exponential arbitrage proposed by F?llmerSchachermayer, the author introduces a new formulation of asymptotic arbitrage with two main differences from the previous one: Firstly, the realising strategy does not depend on the maturity time while the previous one does, and secondly, the probable maximum loss is allowed to be small constant instead of a decreasing function of time. The main result gives a sufficient condition on stock prices for the existence of such asymptotic *** a consequence, she gives a new proof of a conjecture of F?llmer and Schachermayer.

关键词： Asymptotic arbitrage Time-consistent Small probable maximum loss

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INFLUENCE OF SEA LEVEL RISE ON SHANGHAI ASTRONOMICAL TIDE AND STORM SURGE AND ESTIMATION OF probable WATER LEVEL

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Chinese Journal of Oceanology and Limnology 1998年第4期16卷 298-307页

作者：端义宏秦曾灏李永平 Shanghai Institute of Typhoon Shanghai

A nonlinear two-dimension dynamic model of storm surge (SS) and astronomical tide(AT) was used to investigate the effects of SS and AT on expected sea level rise (SLR) at principalcoastal stations in the Shanghai region and to estimate numerically the probable maximum water lerel for2010 - 2050. Evidence suggests tha SLR causes reduction of SS; that its influence on SS depends on theintensity and path of a tropical cyclone and the station locality; tha the SLR’s effects on AT vary periodi-cally, with the peried being the same as tha of the AT’s: and that as the SLR increment grows, its impactincreases; below mean sea level (MSL) the effect is positive at rising tide and negative at ebb tide, andvice versa for the effect above MSL. Study of the probable maximum water level (by assuming SLR, SSalong favorable tropical cyclone’s path, its possible maximum intensity and effectivee spring AT at a rangeof set paths of Cyclones 5612, 8114, 9417) showed that the probable maximum water level is 740, 745,and 751 cm in the years 2010, 2030, and 2050, respetively, over the target region.

关键词： sea level rise astronomical tide storm surge probable maximum water level influence

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possible,likely和probable辨析

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中学英语园地（高二版） 2005年第3期 16-18页

作者：刘洪毓上海

形容词possible，likey和probable都有“可能的”之意，但它们的含义还是有差别的，用法上也有异同。

关键词： possible likely probable 词语辨析形容词用法高二英语

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possible,probable,likely的用法

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英语通（高二版） 2003年第3期 11-12页

作者：田萱海南海南中学

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likely, possible, probable辨析

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中学英语园地(高二版) 2002年第20期 9-9页

作者：魏继德湖南道县一中

在这三个形容词中,likely表示的可能性最大,probable次之,possible表示的可能性最小。①likely用作表语,其后通常跟不定式,其主语多是“人”,也常用于“It...that”结构中;用作定语,意为“有希望的”、“好像很可靠的、可信的”。例如:I... 详细信息

在这三个形容词中,likely表示的可能性最大,probable次之,possible表示的可能性最小。①likely用作表语,其后通常跟不定式,其主语多是“人”,也常用于“It...that”结构中;用作定语,意为“有希望的”、“好像很可靠的、可信的”。例如:Isshelikelytocome?她很可能来吗?(表语)Itislikelythattheywillbecomegoodfriends.他们很有可能成为好朋友。(表语)Itislikelythatthesportsmeetwillbeputoff.运动会很有可能推词义辨析

关键词： likely possible probable

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possible,likely和probable辨析

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大学英语 1999年第5期 36-36页

作者：徐美兰

ｐｏｓｉｂｌｅ，ｌｉｋｅｌｙ和ｐｒｏｂａｂｌｅ这三个词均指现在不肯定，将来可能变成真的或真实的。但它们的内涵和具体用法不尽相同。１、ｐｏｓｉｂｌｅ：可能的，潜在的，强调客观上存在发生某种事情的可能性，但也许不发生。不... 详细信息

ｐｏｓｉｂｌｅ，ｌｉｋｅｌｙ和ｐｒｏｂａｂｌｅ这三个词均指现在不肯定，将来可能变成真的或真实的。但它们的内涵和具体用法不尽相同。１、ｐｏｓｉｂｌｅ：可能的，潜在的，强调客观上存在发生某种事情的可能性，但也许不发生。不能用人作主语，后面常接不定式。①Ｉ...

关键词：不定式 probable possible,likely

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likely, possible, probable辨析

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中学英语园地（高三版） 2002年第10期 9-9页

作者：魏继德湖南道县一中

关键词： likely possible probable 词语辨析形容词英语高中用法

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Long-term submergence of non-methanogenic oxic upland field soils helps to develop the methanogenic archaeal community as revealed by pot and field experiments

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Pedosphere 2020年第1期30卷 62-72页

作者： Takeshi WATANABE Susumu ASAKAWA Koichi HAYANO Graduate School of Bioagricultural Sciences Nagoya UniversityNagoya 464-8601(Japan) Kyushu National Agricultural Experiment Station NishigoshiKumamoto 861-1192(Japan)

The community structure of methanogenic archaea is relatively stable,i.e.,it is sustained at a high abundance with minimal changes in composition,in paddy field soils irrespective of submergence and *** contrast,the abundance in non-methanogenic oxic soils is much lower than that in paddy field *** study aimed to describe methanogenic archaeal community development following the long-term submergence of non-methanogenic oxic upland field soils in pot and field *** the pot experiment,a soil sample obtained from an upland field was incubated under submerged conditions for 275 *** samples periodically collected were subjected to culture-dependent most probable number(MPN)enumeration,polymerase chain reaction-denaturing gradient gel electrophoresis(PCR-DGGE)analysis of archaeal 16 S r RNA gene,and quantitative PCR analysis of the methyl-coenzyme M reductase alpha subunit gene(mcr A)of methanogenic *** abundance of methanogenic archaea increased from 102 to 103 cells g-1 dry soil and 104 to 107 copies of mcr A gene g-1 dry soil after *** no methanogenic archaeon was detected prior to incubation by the DGGE analysis,members from Methanocellales,Methanosarcinaceae,and Methanosaetaceae proliferated in the soils,and the community structure was relatively stable once *** the field experiment,the number of viable methanogenic archaea in a rice paddy field converted from meadow(reclaimed paddy field)was monitored by MPN enumeration over five annual cycles of field *** was also determined simultaneously in a paddy field where the plow layer soil from a farmer’s paddy field was dressed onto the meadow(dressed paddy field)and an upland crop field converted from the meadow(reclaimed upland field).The number of viable methanogenic archaea in the reclaimed paddy field was below the detection limit before the first cultivation of rice and in the reclaimed upland ***,the number gradually increased

关键词： denaturing gradient gel electrophoresis mcrA gene methanogenic archaea microbial community structure microbial habit most probable number method paddy field soil qPCR

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