標(biāo)題: Titlebook: Aquatic Humic Substances; Ecology and Biogeoch Dag O. Hessen,Lars J. Tranvik Book 1998 Springer-Verlag Berlin Heidelberg 1998 Humus.Kohlens [打印本頁] 作者: Tamoxifen 時(shí)間: 2025-3-21 16:09
書目名稱Aquatic Humic Substances影響因子(影響力)
作者: Myofibrils 時(shí)間: 2025-3-21 20:42 作者: TERRA 時(shí)間: 2025-3-22 04:16
https://doi.org/10.1007/978-3-663-04824-4as humic substances is less certain. In particular, spectroscopic methods (UV-visible, IR, and NMR), although widely employed, can yield ambiguous results when applied to humic substances (MacCarthy and Rice 1985).作者: heterodox 時(shí)間: 2025-3-22 06:36
,Flie?barkeit und Zustandsdiagramm,ke waters depend on loading, in situ loss and production, and on dilution or concentration from exchange of water directly with the atmosphere (precipitation and evaporation). Thus, quality of organic matter in surface waters depends on biologic and hydrologic properties of the system and on regional climate.作者: 強(qiáng)化 時(shí)間: 2025-3-22 09:43
https://doi.org/10.1007/978-3-663-04824-4The convincing results of P addition to whole lakes in the Experimental Lakes Area in Canada in the 1970s (Schindler 1977) put an end to the discussion about nutrient limitation in lakes for some decades.作者: LIKEN 時(shí)間: 2025-3-22 15:26
Sources and Age of Aquatic Humusng from about 500 D for dissolved fulvic acid to greater than 100,000 D for humic acids in sediments. Although the heterogeneity of these humic fractions makes rigorous chemical studies challenging, there are sufficient analytical methods at hand to make progress toward understanding the sources, formation pathways, and fate of aquatic humus.作者: 去才蔑視 時(shí)間: 2025-3-22 18:38 作者: LATER 時(shí)間: 2025-3-22 22:42 作者: 拱形面包 時(shí)間: 2025-3-23 05:16 作者: 地殼 時(shí)間: 2025-3-23 07:22
0070-8356 atic systems, but are particularly important in northern, coniferous areas. They strongly modify the aquatic ecosystems and also constitute a major problem in the drinking water supply..This volume covers all aspects of aquatic humic substances, from their origin and chemical properties, their effec作者: Benzodiazepines 時(shí)間: 2025-3-23 11:02
https://doi.org/10.1007/978-3-663-04824-4thetically active radiation (PAR) (400–750 nm). Furthermore, as noted in other chapters, dissolved organic carbon (DOC) compounds compete for photons of visable light with the phytoplankton, which lowers areal primary production in humic waters.作者: Licentious 時(shí)間: 2025-3-23 15:20 作者: LIKEN 時(shí)間: 2025-3-23 20:24 作者: 圣人 時(shí)間: 2025-3-24 01:13
Book 1998 ecosystems and also constitute a major problem in the drinking water supply..This volume covers all aspects of aquatic humic substances, from their origin and chemical properties, their effects on light and nutrient regimes and biogeochemical cycling, to their role regarding organisms, productivity作者: 最小 時(shí)間: 2025-3-24 05:30
https://doi.org/10.1007/978-3-663-04824-4 aquatic humic substances (Choudhry 1981; Zepp 1988; Hoigné et al. 1989; Miller 1994) and the photochemical generation of reactive species (Cooper et al. 1989; Blough and Zepp 1995). A wealth of information is found in these papers and the reader is referred to them for additional discussions and references to topics not thoroughly covered here.作者: Cabg318 時(shí)間: 2025-3-24 07:03
,Flie?barkeit und Zustandsdiagramm,e properties (Perdue, this Vol.).Yet some basic features can be identified; the most obvious would be the presence of chromophores, typically giving from yellow to reddish or brownish colour owing to a pronounced light absorption in the UV, blue and green parts of the spectrum.作者: 發(fā)電機(jī) 時(shí)間: 2025-3-24 13:17
Effects of UV Radiation on Aquatic Humus: Photochemical Principles and Experimental Considerations aquatic humic substances (Choudhry 1981; Zepp 1988; Hoigné et al. 1989; Miller 1994) and the photochemical generation of reactive species (Cooper et al. 1989; Blough and Zepp 1995). A wealth of information is found in these papers and the reader is referred to them for additional discussions and references to topics not thoroughly covered here.作者: 彎曲道理 時(shí)間: 2025-3-24 18:38
Aquatic Humic Matter: from Molecular Structure to Ecosystem Stabilitye properties (Perdue, this Vol.).Yet some basic features can be identified; the most obvious would be the presence of chromophores, typically giving from yellow to reddish or brownish colour owing to a pronounced light absorption in the UV, blue and green parts of the spectrum.作者: 諄諄教誨 時(shí)間: 2025-3-24 19:40 作者: Endoscope 時(shí)間: 2025-3-25 02:26 作者: 背書 時(shí)間: 2025-3-25 05:58 作者: 幻想 時(shí)間: 2025-3-25 10:17 作者: 規(guī)章 時(shí)間: 2025-3-25 14:50
,Flie?barkeit und Zustandsdiagramm,The impact of such factors as flocculation and photochemical processes upon the microbial degradation will also be discussed. The further consequences which the production of bacterial biomass can have on the structure and function of the ecosystem through the consumption of DOM will be considered a作者: 抗體 時(shí)間: 2025-3-25 17:50
https://doi.org/10.1007/978-3-663-04824-4ogically attractive concept of distinct trophic levels. This simplified concept of energy flow has, over the past 30 years, been thoroughly criticized and reformulated (Pimm 1982, Polis and Winemiller 1994). Firstly, almost all organisms are omnivores in the sense that they feed on more than one tro作者: 閑逛 時(shí)間: 2025-3-25 20:26
https://doi.org/10.1007/978-3-663-04824-4.C “age” of dissolved organic carbon (DOC) in the deep ocean is 4000–6000 years B.P. (Williams and Druffel 1987; Bauer et al. 1992), indicating that some organic matter has a long residence time in the ocean. These apparently contradictory observations indicate that residence times of the diverse mi作者: Humble 時(shí)間: 2025-3-26 03:40
Humic Substances as Ecosystem Modifiers — Introductionen humic lakes and clearwater lakes. In a two-dimensional diagram, there would thus be a continuum along the productivity axis from (ultra)oligotrophy to (hyper)eutrophy, while the humic lakes would stretch along the humus (or dissolved organic carbon) axis, yet at the very oligotrophic end. Similar作者: 剝皮 時(shí)間: 2025-3-26 07:01 作者: 鎮(zhèn)痛劑 時(shí)間: 2025-3-26 12:16 作者: Atrium 時(shí)間: 2025-3-26 16:22
The Role of Microbial Extracellular Enzymes in the Transformation of Dissolved Organic Matter in Humtilization by phagotrophic microbes such as flagellates (Sherr 1988; Sanders 1991; Tranvik et al. 1993), osmotrophic microorganisms such as bacteria and fungi are the major sinks for NOM, and by utilizing primarily DOM resources (Benner et al. 1986, 1989; Azam and Cho 1987; Cho and Azam 1988) they a作者: ELATE 時(shí)間: 2025-3-26 18:12
Degradation of Dissolved Organic Matter in Humic Waters by BacteriaThe impact of such factors as flocculation and photochemical processes upon the microbial degradation will also be discussed. The further consequences which the production of bacterial biomass can have on the structure and function of the ecosystem through the consumption of DOM will be considered a作者: FUSC 時(shí)間: 2025-3-27 00:17 作者: white-matter 時(shí)間: 2025-3-27 02:23
Cycling of Dissolved Organic Matter in the Ocean.C “age” of dissolved organic carbon (DOC) in the deep ocean is 4000–6000 years B.P. (Williams and Druffel 1987; Bauer et al. 1992), indicating that some organic matter has a long residence time in the ocean. These apparently contradictory observations indicate that residence times of the diverse mi作者: 燒瓶 時(shí)間: 2025-3-27 05:34 作者: LUMEN 時(shí)間: 2025-3-27 10:17 作者: Deadpan 時(shí)間: 2025-3-27 15:16
https://doi.org/10.1007/978-3-663-04824-4e fraction of the nonliving organic carbon. Scientists all over the world have conducted a tremendous number of studies of humic substances in the field and laboratory. There have been several comprehensive critical reviews of the state of the art of the study of humic substances (Christman and Gjes作者: 凹室 時(shí)間: 2025-3-27 19:18
,Flie?barkeit und Zustandsdiagramm,which they were derived (Kononova 1975; Hayes and Swift 1978). The predominant part of organic material in surface waters is normally allochthonously derived. The material is produced within the catchment and brought to the lakes and rivers by runoff in countless numbers of physicochemical forms (e.作者: Notorious 時(shí)間: 2025-3-27 22:43
,Flie?barkeit und Zustandsdiagramm,ive properties that have significant effects on aquatic ecosystems. Operationally, DOM passes through most common filters and is composed mainly of organic matter. DOM is a significant source of carbon fueling microbial metabolism (Wetzel et al. 1995) and attenuates significantly the penetration of 作者: FUSC 時(shí)間: 2025-3-28 05:12 作者: COLIC 時(shí)間: 2025-3-28 10:11 作者: 拖債 時(shí)間: 2025-3-28 13:28 作者: 保守 時(shí)間: 2025-3-28 16:35 作者: 放牧 時(shí)間: 2025-3-28 22:14 作者: AER 時(shí)間: 2025-3-28 23:29 作者: 極為憤怒 時(shí)間: 2025-3-29 06:27 作者: 委托 時(shí)間: 2025-3-29 09:41 作者: 我沒有命令 時(shí)間: 2025-3-29 13:52
,Flie?barkeit und Zustandsdiagramm,umic substances (HS). First of all, the definition of HS per se is not trivial, since the distinction between aquatic humus and other types of dissolved, colloidal or particulate matter is not unifying. Being composed of a multitude of complex molecules of different origin, structure, molecular size作者: Congruous 時(shí)間: 2025-3-29 19:26
Aquatic Humic Substances978-3-662-03736-2Series ISSN 0070-8356 Series E-ISSN 2196-971X 作者: mendacity 時(shí)間: 2025-3-29 23:48
https://doi.org/10.1007/978-3-662-03736-2Humus; Kohlenstoffkreislauf; Limnologie; Water supply; aquatic ecology; bacteria; chemistry; ecology; ecosys作者: 不怕任性 時(shí)間: 2025-3-30 00:02
978-3-642-08362-4Springer-Verlag Berlin Heidelberg 1998作者: INCH 時(shí)間: 2025-3-30 07:35 作者: HEPA-filter 時(shí)間: 2025-3-30 10:24
