sources production and regulation of allochthonous dissolved organic matter inputs to surface waters
Effect of dissolved organic matter (DOM) and biofilm on the adsorption capacity of powdered activated carbon in activated sludge
Ngày tải lên :
05/09/2013, 08:40
... concentration during and after the shock loading of 3,5-DCP onto PACT and control reactors - 252 - Journal of Water and Environment Technology, Vol.1, No.2, 2003 3.2 Effects of dissolved organic matter (DOM) ... other dissolved organic matters (DOM) and biofilm attached onto PAC However, it is not clear that the effect of DOM and biofilm attached onto PAC were decrease in adsorption capacity of PAC in the ... The objective of this study is to clarify the effect of DOM and biofilm on the adsorption capacity of PAC in the aeration tank of PACT process Materials and methods 2.1 Operation of powdered activated...
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Analysis of the atmospheric distribution, sources, and sinks of oxygenated volatile organic chemicals based on measurements over the Pacific during TRACE-P pdf
Ngày tải lên :
14/03/2014, 20:20
... Lack of any latitudinal trend in HCHO is in part due to measurements close to the limit of detection ($30 ppt at 2s for 5-min averages) and in part due to the homogeneity of the sources and sinks ... with C Potter of NASA Ames, R Atkinson of UC Riverside, and P Harley and A Guenther of NCAR are much appreciated References Andreae, M O., and P Merlet (2001), Emissions of trace gases and aerosols ... C J Popp, and R S Martin (2004), Biogenic emissions and ambient concentratiosn of hydrocarbons, carbonyl compounds and organic acids from Pondorosa pine and Cottonwood trees of rural and forested...
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Controls of bioavailability and biodegradability of dissolved organic matter in soils
Ngày tải lên :
15/03/2014, 23:22
... reactors are the release of DOM into the solution and the adsorption of DOM onto the biofilms Furthermore, it seems impossible to determine the pool sizes and the residence times of a rapidly and ... Biodegradation; Dissolved organic matter; DOC Introduction In the past 10 years, much progress has been made in the understanding of dissolved organic matter (DOM) functions and dynamics in soils Today, ... 2001 Production of refractory dissolved organic matter by bacteria Science 292, 917 – 920 Oikari, A., Kukkonen, J., Virtanen, V., 1992 Acute toxicity of chemicals to Daphnia magna in humic waters...
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Báo cáo khoa học: Modelling and simulating interleukin-10 production and regulation by macrophages after stimulation with an immunomodulator of parasitic nematodes potx
Ngày tải lên :
29/03/2014, 23:20
... production and regulation of this cytokine via Av17 Understanding what is the receptor addressed by Av17 could pave the way to understanding the dynamics of Av17 and macrophages and allow refining of the ... interleukin-10 production and regulation Fig 12 Perturbations of p38 activation (model 2) Range of perturbation: factor 10 and factor 0.1 Red line: no perturbation Green line: factor of perturbation ... leading to the production of IL-10 All of these receptors (CD36, FccR, and Toll-like receptor 2) signal through the ERK signalling cascade, which makes them attractive for studying the production and...
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Fouling and accumulation of dissolved organic matter in membrane bioreactors
Ngày tải lên :
14/09/2015, 11:16
... FOULING AND ACCUMULATION OF DISSOLVED ORGANIC MATTER IN MEMBRANE BIOREACTORS LIANG SHUANG (B Eng., Qingdao Technological University) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY ... 1.1 Background Dissolved organic matter (DOM) is ubiquitous in surface water and sewage, and has been a major concern in water and wastewater treatment systems In drinking water production, DOM ... is identified to be the main cause of fouling during microfiltration/ultrafiltration of surface water, resulting in severe loss of system productivity (Yuan and Zydney, 2000; Howe and Clark, 2002)...
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Biological Alteration of Zinc Complexation Characteristics of Dissolved Organic Matter in Domestic Wastewater Treatment Plant Effluent under River Water Environment
Ngày tải lên :
05/09/2013, 10:15
... dissolved organic matter from surface water and wastewater effluent, Ecotoxicology and Environmental Safety, 61, 337-344 Shiller A M., Duan S., van Erp P and Bianchi T S (2006) Photo-oxidation of dissolved ... (2006) Comparison of zinc complexation properties of dissolved natural organic matter from different surface waters, Journal of Environmental Management, 80, 222-229 Ma H., Allen H E and Yin Y (2001) ... Characterization of isolated fractions of dissolved organic matter from natural waters and a wastewater effluent, Water Research, 35 (4), 985-996 Sarathy V and Allen H E (2005) Copper complexation by dissolved...
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Influence of Phosphorus Concentration on the Biodegradation of Dissolved Organic Matter in Lake Biwa, Japan
Ngày tải lên :
05/09/2013, 10:17
... particulate organic matter did not affect CODMn, the possibility of accumulation of dissolved organic matter (DOM) is pointed out (Imai, 2002) On the other hand, Takahashi (1999) reported that dissolved ... substances and other dissolved organic matter and their effects on the increase of COD in Lake Biwa, Anal Sci., 20, 159-164 Gurung T B and Urabe J (1999) Temporal and vertical difference in factors ... 161-170 (in Japanese) Hayakawa K and Takahashi M (2002) Behavior of dissolved organic matter in the northern basin of Lake Biwa and current situation related to COD increase, Annual Rep Lake...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 1 pptx
Ngày tải lên :
15/12/2013, 00:15
... Harvesting/concentration and cold storage of rotifers 3.7 Production and use of resting eggs 3.8 Literature of interest 3.9 Worksheets Worksheet 3.1 Preparation of an indicator solution for determination of residual ... activities of Dr A.G.J Tacon, Fishery Resources Officer, Inland Water Resources and Aquaculture Service, FAO Fishery Resources Division, to help meet the needs of aquaculture workers of Member ... Literature of interest CLADOCERANS, NEMATODES AND TROCHOPHORA LARVAE 6.1 Daphnia and Moina 6.1.1 Biology and life cycle of Daphnia 6.1.2 Nutritional value of Daphnia 6.1.3 Feeding and nutrition of Daphnia...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 2 doc
Ngày tải lên :
15/12/2013, 00:15
... contamination during handling and poor temperature regulation To reduce risks, two series of stocks are often retained, one which supplies the starter cultures for the production system and the other ... coagulate and precipitate to the bottom or float to the surface Recovery of the algal biomass is then accomplished by, respectively, siphoning off the supernatant or skimming cells off the surface ... photosynthesize, i.e they assimilate inorganic carbon for conversion into organic matter Light is the source of energy which drives this reaction and in this regard intensity, spectral quality and...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 3 ppt
Ngày tải lên :
15/12/2013, 00:15
... increase and not by cell division The epidermis contains a densely packed layer of keratin-like proteins and is called the lorica The shape of the lorica and the profile of the spines and ornaments ... also to be paid to more frequent and smaller feeding distributions This is essential for the maintenance of good water quality, and to avoid periods of overfeeding or starvation which are not tolerated ... can significantly reduce protozoan contamination Screening and cleaning of the rotifers through the use of phytoplankton filters (< 50 àm) so as to reduce the number of ciliates or other small...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 4 pptx
Ngày tải lên :
15/12/2013, 00:15
... outputs, not only in terms of survival, growth and success of metamorphosis of many species of fish and crustaceans, but also with regard to their quality, e.g reduced incidence of malformations, improved ... inbetween two reproduction cycles from one mode of reproduction to the other The cysts usually float in the high salinity waters and are blown ashore where they accumulate and dry As a result of this ... vectors; the floating cysts adhere to feet and feathers of birds, and when ingested they remain intact for at least a couple of days in the digestive tract of birds Consequently the absence of...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 5 docx
Ngày tải lên :
15/12/2013, 00:15
... determined by the conditions and techniques applied for harvesting, cleaning, drying and storing of the cyst material The impact of most of these processes can be related to effects of dehydration or combined ... saving of over one third in the amount of Artemia cysts used, compared to the use of live nauplii Table 4.2.4 The proximate composition (in % of dry matter) of decapsulated Artemia cysts and instar ... for the predator Decapsulation of cysts does not lead to ascorbic sulfate hydrolysis Resorption and biological activity of AAS in the predator’s tissue is still subject of research, and although...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 6 docx
Ngày tải lên :
15/12/2013, 00:15
... significant reduction of labour and production costs Figure 4.3.2 Concentrator/rinser in use (Photo from Sorgeloos and Léger, 1992) As the live food is suspected to be a source of bacterial infections ... reduction of the number of hatchings and harvests daily, fewer tanks, bigger volumes) Furthermore, cold storage allows the farmer to consider more frequent and even automated food distributions of an ... 4.3.5 Correlation of mortality rate of Menidia menidia larvae and nauplii length of Artemia from seven geographical sources offered as food to fish larvae (modified from Beck and Bengtson, 1982)...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 7 pptx
Ngày tải lên :
15/12/2013, 00:15
... Enrichment of ongrown Artemia 4.4.2.8 Control of infections 4.4.2.9 Harvesting and processing techniques 4.4.2.10 Production figures and production costs 4.4.2.1 Advantages of tank production and tank ... systems Today, over 95% of the more than 3000 metric tons of Artemia biomass that are marketed in this sector are sold frozen since they are harvested from a restricted number of natural sources and ... bubbles compared to big ones Too small air bubbles, on the other hand, may get trapped between the thoracopods and skim off the animals to the surface WATER QUALITY The quality of the culture medium...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 8 pptx
Ngày tải lên :
15/12/2013, 00:15
... also an expensive and labour intensive job COMBINATION OF ORGANIC AND INORGANIC FERTILIZERS A common practice is to use a combination of inorganic and organic fertilizers While inorganic fertilizers ... filaments) To date, the only method used to reduce the amount of filamentous algae is by manual removal and raking, which is of course very labour intensive PREDATORS AND COMPETITORS The abundance of ... hectare, to be applied to dry pond bottoms The lime requirement is highest for clay bottoms, acid bottoms and when the pond water has a low concentration of Ca2+ and Mg2+ (note that in high saline waters...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 9 pptx
Ngày tải lên :
15/12/2013, 00:15
... intensity, ) and biota (phytoplankton and copepod production, number of predators, bacterial turn-over, regeneration of nutrients from copepods and fish larvae) in such a way that the production of one ... consisting of a multispecies, natural food chain of phytoplankton (diatoms, flagellates, Nannochloris, ), zooplankton (tintinnid ciliates, Synchaeta and Brachionus rotifers, copepods, ) and predators ... and the outflow points for rinsing water (Barnabé, 1990) 5.1.5 Transport and storage of collected zooplankton Harvest and transport of zooplankton interferes considerably with the survival of...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 10 pptx
Ngày tải lên :
15/12/2013, 00:15
... zooplankton, and copepods, nematodes and trochophores The document has been prepared to help meet the needs of aquaculture workers of member countries for the synthesis of information in the field of ... of 0.2 kg lime powder per ton soil After this the pond is then filled with water up to 15 cm Poultry manure is added to the ponds on the 4th day at a rate of 0.4 kg.m-3 to promote phytoplankton ... by using sieves 6.1.5 Production and use of resting eggs Resting eggs are interesting material for storage, shipment and starting of new Daphnia cultures The production of resting eggs can be...
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Tài liệu Báo cáo khoa học: miRNAs and regulation of cell signaling pptx
Ngày tải lên :
14/02/2014, 19:20
... role of miRNAs with respect to the complicated regulation of the transcriptome and signal transduction Although miRNAs and well-established cell signaling pathways have been the subject of recent ... transcription factors ZEB1 and ZEB2 are downstream mediators of TGF-b signaling and negatively regulate the expression of E-cadherin The miR-200 family is reported to target ZEB1 and ZEB2, which ... repression of their target genes Indeed, several examples of feedback regulation that involve miRNAs have been reported Below, we attempt to summarize our recent understanding of feedback regulation of...
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Tài liệu Báo cáo khoa học: Production and characterization of a secreted, C-terminally processed tyrosinase from the filamentous fungus Trichoderma reesei ppt
Ngày tải lên :
19/02/2014, 06:20
... Da) The identity of this peptide was then confirmed by MALDI-TOF ⁄ TOF fragment ion analysis, where partial sequences of this peptide were obtained from the ladders of b-fragment and y-fragment ... MALDI-TOF ⁄ TOF fragment ion analysis as well as by Edman degradation of the corresponding peptide after purification by reversed-phase chromatography During the search for and confirmation of the ... (GlcNAc)2(Hex)5, attached to it Further MALDI-TOF ⁄ TOF MS analysis of this peptide selected as the precursor ion (Fig 4) revealed a ladder of b-ions corresponding to the suggested glycopeptide...
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