light and dark reactions of photosynthesis
plant physiological ecology (lambers et al 2008)
Ngày tải lên :
03/04/2015, 15:00
... Introduction General Characteristics of the Photosynthetic Apparatus 2.1 The ‘ Light ’ and ‘ Dark ’ Reactions of Photosynthesis 2.1.1 Absorption of Photons 2.1.2 Fate of the Excited Chlorophyll 2.1.3 ... Effects of Soil Nutrient Supply on Photosynthesis 6.1 The Photosynthesis Nitrogen Relationship 6.2 Interactions of Nitrogen, Light, and Water 6.3 Photosynthesis, Nitrogen, and Leaf Life Span Photosynthesis ... some of the enzymes involved in the ‘ dark ’ reactions require light for their activation, and hence the difference between ‘ light ’ and ‘ dark ’ reaction is somewhat blurred 2.1.1 Absorption of...
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arsenic contamination in soils, water and plants
Ngày tải lên :
25/04/2013, 08:21
... soil profile of each borehole is relatively similar composed of alternating layers between clay, silty clay and sandy silty clay which are smaller grain sizes and higher cohesion than purely sandy ... mg/kg, which is the specification of soil for dwelling and agriculture specified by the Office of the National Environment Board of Thailand The remarkable contaminants of arsenic in Surface water ... the agriculture and living area in near future GENERAL INFORMATION Loei, one of 76 provinces of Thailand, is situated in Northeastern part attached to the Maekong River and border of Lao People's...
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Improvement of nutrient removal and phosphorus recovery in the anaerobic/oxic/anoxic process combined with sludge ozonation and phosphorus adsorption
Ngày tải lên :
05/09/2013, 09:38
... into the system The characteristics of the influent wastewater were as follows: 160–200 mg/L of SS, 55–80 mg/L of TOC, 45–55 mg/L of T-N, and 4.0–5.5 mg/L of T-P In this study, four different ... phosphorus removal and denitrification (3) Most of the phosphorus in the sludge was solubilized by ozonation, and a large part of the solubilized phosphorus consisted of PO4-P Over 90% of the PO4-P ... improved the mass transfer of ozone, and the high inner pressure in the bubbles could accelerate the formation of hydroxyl radicals Therefore, some of the biorefractory and/ or slowly biodegradable...
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Tài liệu Báo cáo khoa học: Analyzing changes of chromatin-bound replication proteins occurring in response to and after release from a hypoxic block of replicon initiation in T24 cells pptx
Ngày tải lên :
21/02/2014, 00:20
... staining of total cellular and chromatin-bound PCNA T24 were grown and incubated on coverslips Two sets of hypoxic cells and of cells reoxygenated for 10 and 30 were prepared One set of cells ... analyses of growing daughter strands A fast increase of the DNA synthesis rate either reflects release of replicon initiations or stimulation of elongation, or both To determine the cause of the ... renewal before and at the end of hypoxic gassing as well as under normoxic conditions As shown in Fig MCM3 and Cdc6 are not, and MCM2 and Cdk2 are barely, detectable on chromatin of starved T24...
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Programme title: Soils and Environmental Pollution MSc doc
Ngày tải lên :
06/03/2014, 23:20
... major types of soil contamination, familiarity with regulatory and commercial aspects of contaminated land and land management and problem solving skills in relation to soil management and remediation ... contaminated land management and land remediation Graduates from the course will have an in-depth knowledge of the chemical, physical and biological principles of Soil Science, experience of the major ... Knowledge and Understanding A Knowledge and understanding of: Processes by which water and dissolved solutes are transported in soils using physical principles The important chemical properties of soils,...
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Báo cáo "The effect of Cu concentration in soil and phosphorous fertilizer on plant growth and Cu uptake by Brassia juncea L. grown on contaminated soils " doc
Ngày tải lên :
14/03/2014, 15:20
... significantly different rates of Cu application (Table 1) Each pot with kg of soil was sown with seeds of Brassica juncea L and water to the moisture level of about 70-80% of the field capacity Table ... soil The contents of Cu in plant increase upon the rates of Cu application, especially at the high rate of Cu above 100 ppm It can be said that the increase of rate of Cu uptake and accumulation ... than 80kg P2O5/ha At the application rate of 80kg P2O5/ha, the height and biomass of plant are increased by 30% and 31% respectively, and the content of Cu in plant is reduced by 14% compared...
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Adsorption of heavy metal inons on soils and soil constituents
Ngày tải lên :
15/03/2014, 23:09
... most of the partitioning processes of Cr between the solid and the aqueous media in soils The most important among these are the hydrolysis of Cr(III) and Cr(VI), redox reactions of Cr(III) and ... pH dependence of Cd, Cu, and Zn adsorption onto a sediment composite, which consists basically of Al-, Fe-, and Si-oxides 50% of the copper is adsorbed at pH 4.1, and the slope of the Cu adsorption ... description of reactions occurring between ions in solution and the charged surface Models available may vary in the description of the nature of surface charge, the number and position of potential...
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Chemical speciation and extractability of zn, cu and cd in two contrasting biosolids amended clay soils
Ngày tải lên :
15/03/2014, 23:22
... properties of the soils and biosolids are shown in Table and concentrations of major nutrients and heavy metals are listed in Table The fresh sludge had a dry matter content of 24.5% and was air-dried ... appropriate for the estimation of short and medium term metal risks (Tack and Verloo, 1996) However, the use of single extraction in the study of the distribution of heavy metals in biosolids-amended ... components and properties vary greatly in different soils, and these can have a very important influence on the mobility and bioavailability Most of the differences in the sizes of the single extraction and...
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Competitive sorption of cadmium and lead in acid soils of central spain
Ngày tải lên :
15/03/2014, 23:22
... kaolinite and more smectite and illite Both S1 and S2 had similar proportions of phyllosilicates in the V mm soil fraction and of goethite and haematite in the clay fraction The greater content of illite ... intervals of the estimated exponents, and the standard error of the estimate are shown in Table The average value of the exponents found for S1, S2 and S3, were 0.03 F 0.015 (standard deviation) and ... amount of heavy metal sorbed by the soil solids (Amol kgÀ 1), and m and b the slope and intercept, respectively Similar to Mesquita and Viera ´ e Silva (2002), Fontes and Gomes (2003) and Rodrıguez-Maroto...
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Concentration and chemical speciations of cu, zn, pb and cr of urban soils in nanjing, china
Ngày tải lên :
15/03/2014, 23:22
... of urban soils in China (Lu, 2000) The objective of this study was to determine the total Cu, Zn, Pb and Cr concentrations and chemical speciation of urban soils in Nanjing, China Materials and ... Group of Natural Background Values of Soil and Academia Sinica (1979) Liu (1996) concentration is triple the mean value of soils in China and twice as much as the natural background value of soils ... coefficients for Cu, Zn, Pb and Cr are 0.997, 0.989, 0.990 and 0.986 ( P < 0.01), respectively The Cu, Zn, Pb and Cr fractions expressed as amounts and percentages of the sum of individual chemical...
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Controls of bioavailability and biodegradability of dissolved organic matter in soils
Ngày tải lên :
15/03/2014, 23:22
... the stabilisation and destabilisation of soil organic matter, and thus, in C dynamics and C pools of soils Sollins et al (1996) present a conceptual model of SOM stabilisation and destabilisation ... inhibiting effects of Al and Fe on citrate mineralisation only at molar ratios of at least 0.97 and suspect that this is likely due to precipitation of metal oxides and subsequent sorption of their organic ... obstacle for a better understanding of the controls of DOM biodegradability is the lack of a standardised methodology or at least systematic comparisons between the large number of methods used to assess...
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Effects of compost and phosphate amendments on arsenic mobility in soils and arsenic uptake by the hyper
Ngày tải lên :
16/03/2014, 00:07
... pathway from inorganic and methylated forms of As (Onken and Adriano, 1997) Akins and Lewis (1976) added DSMA-74As to a soil system and measured a loss of 74As The loss of 74As from the reduced ... mechanism of P-enhanced release of As in the soil and subsequent promotion of As movement through the soil by competition of dissolved As and P for ion adsorption sites (Davenport and Peryea, ... significant change in pH of the CCA soil was probably due to the similar pH of the soil and each of the amendments The application of the neutral pH amendments increased pH of the acidic ASC soil...
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Heavy metal contamination in soils of urban highways (comparision between runoff and soil concentration
Ngày tải lên :
16/03/2014, 00:25
... 1.6% of Pb, 0.4% of Zn, 1.7% of Cu, 4% of Ni and 5% of Cr are exchanged with KNO3 Adsorbed metals were also very low 301 HEAVY METAL CONTAMINATION IN SOILS OF URBAN HIGHWAYS TABLE II Results of ... only from body parts and tyres of the vehicles The amount of Zn in the runoff is higher than the amount measured in the soil This could be because of discharge of some of the runoff waters into surface ... measurements of lead Gibson and Farmer (1984) applied a six-step sequential leaching procedure to soil and street dirt in order to understand environmental mobility and bioavailability of Pb, Zn, Cu and...
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Immobilization and phytoavailability of cadmium in variable charge soils effect of lime addition
Ngày tải lên :
16/03/2014, 00:25
... Bioavailability and Risks of Metals 2nd edn Springer, New York 866 p Andersson A and Siman G 1991 Levels of Cd and some other traceelements in soils and crops as influenced by lime and fertilizer ... surface Liming, as part of the normal cultural practices, has often been shown to reduce the concentration of Cd and other metals in the edible parts of a number of crops Addition of other alkaline ... Cd, Cu, Ni, and Zn on yield and Cd content of wheat-grain J Environ Qual 8, 202–207 Boekhold A E, Temminghoff E J M and van der Zee S E A T M 1983 Influence of electrolyte composition and pH on...
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Báo cáo khoa học: Dual effect of echinomycin on hypoxia-inducible factor-1 activity under normoxic and hypoxic conditions docx
Ngày tải lên :
16/03/2014, 05:20
... expressed as means ± 1SD (n ¼ 3) *, ** and ***, P < 0.05, 0.01 and 0.001 versus normoxia (*), (**) and (***), P < 0.05, 0.01 and 0.001 versus hypoxia 30%, and that of AP-1 by 50% (Fig 2A,B) Echinomycin ... activity and the b-galactosidase activity, as means ± 1SD (n ¼ 3) *, ** and ***, P < 0.05, 0.01 and 0.001 versus normoxia (*), (**) and (***), P < 0.05, 0.01 and 0.001 versus hypoxia [*] and [**], ... overexpression and patient mortality have been shown in different types of cancer [7] The identification of HIF-1 involvement in tumour progression and angiogenesis led to the concept of HIF-1 as...
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chemical equilibria and kinetics in soils
Ngày tải lên :
01/04/2014, 10:28
... mole each of protons and bicarbonate ions in solution The development of chemical reactions to describe the transformations of material substances and the determination of which chemical reactions ... the measurement of the chemical potentials of soil components involves the prior designation of a set of Standard States that are characterized by selected values of T and P and specific conditions ... pert and precise summary of what chemical thermodynamics can (and cannot) and how it does it: "must reading" to accompany the present chapter Wilkins, R G., Kinetics and Mechanism of Reactions of...
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Dự án nông nghiệp " Major Cropping Soils and Soil Constraints to Productivity of Major Upland Crops Grown by Smallholders - Southern Central Coast " pdf
Ngày tải lên :
21/06/2014, 04:20
... production of specific crops The objectives of this series of reports are to: review existing information on the identification and extent of upland cropping soils in focus provinces of Vietnam ... 1500-1700 mm; and • Southern Ca Pass (Khanh Hoa, Ninh Thuan): < 600 mm The landforms of the Southern Central Coast comprise: (i) mountains and midlands, (ii) river deltas, and (iii) coastal sand dunes, ... in Table Of the total land area of the Southern Central Coast, about 19% comprises land that is suitable for agriculture (of which about 21% is cultivated), 39% comprises forestry land, and 35%...
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