... acidification of organic acids in litter, acid atmospheric deposition, cation uptake and biomass harvest (Andersson and Persson, 1988) High A concentrations in the soil solution affect plant uptake of ... (1988) Effects of aluminum and calcium in the soil solution of acid soils on root elongation of glycine max cv Forrest Aust J Agri Res 39, 319-338 Brunner W, Blaser P (1989) Mineralization of soil ... Elements of a functional definition of oligotroph humus based on the nitrogen nutrition of forest stands, J Appl Ecol 10, 569-583 Praag H Warfvinge P (1993) The effect of soil acidification on the...
Ngày tải lên: 08/08/2014, 18:21
... area EFFECTS OF SPILLED AND STRANDED OIL ON TIDAL FLAT ECOSYSTEM The penetrated oil concentrations in the sediments after the spill were estimated from the concentration of hopane, i.e a non-degradable ... sediment (Cheong, 2000) The purpose of this study is to evalluate the effects of stranded oil on tidal flat ecosystems with special emphasis on the relationship between seawater infiltration and macrobenthic ... water content of the sediments between high and low tides according to the method described by Cheong (2000) - 24 - Journal of Water and Environment Technology, Vol.2, No.1, 2004 Concentration of...
Ngày tải lên: 05/09/2013, 08:40
Báo cáo khoa học: Dissociation/association properties of a dodecameric cyclomaltodextrinase Effects of pH and salt concentration on the oligomeric state pot
... to the KCl concentration [9] The excitation and emission bandwidths were nm, and the scan speed was 1200 nmặmin)1 CD measurements CD spectra of CDase I-5 in different concentrations of KCl were ... spectra of CDase I-5 dissociation at various concentrations of KCl at pH and 25 C (B) Plot of log DF versus time by the Guggenheim method d, dissociation of CDase I-5 in the presence of 0.2 M ... the role of the oligomerization of CDase I-5, its dissociation/ association properties were investigated at low and high pHs and in the presence of KCl Considering also the 3D structure of CDase...
Ngày tải lên: 07/03/2014, 12:20
EFFECTS OF TARIFFS AND SANITARY BARRIERS ON HIGH- AND LOW-VALUE POULTRY TRADE potx
... 10% of world consumption The objective of this paper is to evaluate the effects of sanitary barriers to poultry trade in the context of the economic incentives and other trade policy decisions ... EFFECTS OF TARIFFS AND SANITARY BARRIERS ON HIGH -AND LOW-VALUE POULTRY TRADE Everett B Peterson1 and David Orden2 INTRODUCTION World poultry markets are one of the most rapidly growing sectors of ... regions (five countries and the European Union (EU)) and two rest -of- world region aggregates The model incorporates several extensions of previous work First, most previous analysis of the economic...
Ngày tải lên: 08/03/2014, 09:20
Effects of compost and phosphate amendments on arsenic mobility in soils and arsenic uptake by the hyper
... solution (Table 6) This is consistent with the 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 ... influence of chemical form and concentration of arsenic on rice growth and tissue arsenic concentration Plant and Soil 139, 175–183 Meharg, A.A., Hartley-Whitaker, J., 2002 Arsenic uptake and metabolism ... CCA soil As concentrations in each fraction of the control and treated soils had decreased with time, especially in Al–As and Fe–As These two fractions had As decreases of 11.7 to 34% and to 40%,...
Ngày tải lên: 16/03/2014, 00:07
Báo cáo khoa học: Mutual effects of proton and sodium chloride on oxygenation of liganded human hemoglobin Oxygen affinities of the a and b subunits potx
... fourth ligand molecule The purpose of this study was twofold First, the mutual effects of pH and NaCl on the bimolecular association rate constant of O2 rebinding and the 6110 quantum yield of BR ... oxygenation S V Lepeshkevich and B M Dzhagarov Table Mutual effects of proton and NaCl on hemoglobin oxygenation Conditions: 10 mM Tris ⁄ HCl buffer, at 21 °C NaCl conc pH Protein conc lM (in ... the ligand-binding site of liganded hemoglobin The conformation of Val(E11) in the a and b subunits relative to the heme plane is quite dependent on the nature of the anions and the pD of the...
Ngày tải lên: 16/03/2014, 14:20
Effects of cattle and poultry manures on organic matter content and adsorption complex of a sandy soil under cassava cultivation (Manihot esculenta, Crantz) doc
... characterisa-tion of the different organic matter in animal manures ii) The determination of the manures effects on organic matter content and adsorption complex of the soil under cassava cultivation 191 ... very sandy soils under the control, sandy under the cattle manure, sandy on the top horizon (0 - 22 cm) and sandy-clay on the sub horizon (22 - 55 cm) under the poultry manure The clay contents ... result of continuous cultivation in sub-Saharan Africa has been identified as a major cause of food insecurity and poverty and crop yields continue to decline on smallholder farmers fields and there...
Ngày tải lên: 23/03/2014, 21:20
báo cáo hóa học:" Different effects of femoral and tibial rotation on the different measurements of patella tilting: An axial computed tomography study" doc
... itself from the confounding effect of femoral and tibial rotation Discussion The current study has demonstrated various effects of regional bony alignment on the different measurements of the patellar ... investigations were conducted in conformity with ethical principles of research, and the informed consent was obtained Results Figure the knee Measurements of PTAs and the neighboring bone rotation of ... motions of the tibia and femur are believed to have an effect on patellofemoral mechanics and therefore PFPS [13] The current work is to explore the various effects of neighboring bone rotation on...
Ngày tải lên: 20/06/2014, 01:20
Báo cáo hóa học: " Effects of crystallization and dopant concentration on the emission behavior of TiO2: Eu nanophosphors" potx
... the bandgap of Eu-doped CdS nanorods with the increase of doping concentration The reason of such bandgap energy increment has been proposed as the gradual movement of the conduction band of TiO2 ... through the creation of dopant levels near the valence band of TiO2 on Fe+3 ion incorporation Therefore, the relative shift of the absorption edge of the semiconductor depends strongly on the difference ... decreases, the phonon is increasingly confined within the particle, and the phonon momentum distribution increases This situation leads to a broadening of the momentum of the scattered phonon according...
Ngày tải lên: 20/06/2014, 23:20
Báo cáo nghiên cứu khoa học: " EFFECTS OF ULTRASOUND AND MICROWAVE IRRADIATION ON THE GREEN OXIDATION OF ALKYLARENES BY KMnO4/CuSO4 5H2O"ơ ppsx
... irradiation conditions There were some exceptional cases: i) in the case of oxidation of 5, the reaction temperature provided by microwave or conventional heating increased the yield of 5b, ii) ... case of the oxidation of 4, the assistance of microwave or ultrasound increased the formation of 1a by cleavage of a methyl group, and iii) 6a and 7a became over-oxidized to indan-1,3dione and ... (7a) O 9-Fluorenone (8a) Fig Structure of substrates and products in the oxidation of alkylarenes 2.RESULTS AND DISCUSSION The stoichiometric factor investigated on the oxidation of diphenylmethane...
Ngày tải lên: 22/07/2014, 03:20
Báo cáo lâm nghiệp: "Interactive effects of irradiance and water availability on the photosynthetic performance of Picea sitchensis seedlings: implications for seedling establishment under different management practices" ppt
... CO2 concentrations, under both water limited and waterlogged conditions [9, 27] Photosynthesis would also be inhibited due to the increased participation of competing pathways and consumption of ... acclimation ability and light requirements of different species [31, 32] Although the impacts of water deficits may be less under shaded conditions, because of a lower evaporative demand, the amount of ... proportion of photons partitioned to PSII and Io is the incident irradiance The proportion of electrons that are dissipated through processes other than photosynthetic carboxylation of RuBP (Pdiss),...
Ngày tải lên: 08/08/2014, 00:22
Báo cáo lâm nghiệp: "Interactive effects of phosphorus and light availability on early growth of maritime pine seedlings" pptx
... weighed and N and P contents measured colorimetrically with a Technicon Autoanalyser II [43] 2.4 Control of environmental conditions The photosynthetic photon flux density (PPFD) was measured continuously ... Marcelis L.F.M., Harbinson J., Lambers H., Contrasting effects of N and P deprivation on the regulation of photosynthesis in tomato plants in relation to feedback limitation, J Exp Bot 54 (2003) ... environment, a field and laboratory manual, Chapman and Hall, London, 1993, pp 207– 219 [20] Fredeen A.L., Rao I.M., Terry N., Influence of phosphorus nutrition on growth and carbon partitioning...
Ngày tải lên: 08/08/2014, 00:22
Báo cáo khoa học: "Effects of livestock and prescribed fire on coppice growth after selective cutting of Sudanian savannah in Burkina Fas" pptx
... harmful and sometimes devastating for forest reproduction [4, 5], whereas the effect of grazing on reproduction of woody vegetation is less discussed This has often created conflicts among herders and ... found on shallow soils and perennials dominated on deeper soils A total of 74 woody species were encountered and one third of these were considered to have tree stature and two thirds are considered ... degree of recovery of Ba20 was 20% and of Ba130 was 10%, disregarding the growth of non-cut stems in 1993 Table III Mean values of 48 plots with a size of 0.25 each, for dendrological parameters of...
Ngày tải lên: 08/08/2014, 14:20
Báo cáo khoa học: "Effects of irrigation and nitrogen fertiliser on the growth and nutrient relations of Prunus avium L and ’Colt’ (Prunus avium x Prunus pseudocerasus) in the nursery and after transplantation" doc
... influence of irrigation on nursery tree seedling nutrient relations and even less information is available on the influence of irrigation on seedling nutrient relations and subsequent growth and survival ... applications Irrigation reduced water stress in the nursery and had a positive influence on P and K concentration and a negative influence on Ca and Mg concentration in the leaves Trickle irrigation ... concentration of extractable P in the soil (Bacon and Davey, 1992) and the concentration of P in the leaves of mature fruit trees in some years (Goode and Ingram, 1971; Atkinson, 1986) Atkinson...
Ngày tải lên: 08/08/2014, 19:21
Báo cáo y học: "Effects of etizolam and ethyl loflazepate on the P300 event-related potential in healthy subjects" docx
... and subchronic administration of ethyl loflazepate and etizolam Ethyl loflazepate is a potent, non-sedative, anxiolytic drug with a long EH of 122 h [21], whereas etizolam is characteristic of ... evaluation time, and is relatively independent of response selection and execution [28-30] Therefore, it is conceivable that ethyl loflazepate has less effect on P300-related information processing, ... regions than low-dose etizolam For a while, subchronic administration of etizolam, but not ethyl loflazepate, caused weak prolongation in P300 latency in the Fz but not Cz and Pz regions In contrast,...
Ngày tải lên: 09/08/2014, 01:21
Báo cáo khoa học: " Evaluation of the effects of climatic and nonclimatic factors on the radial growth of Yezo spruce (Picea jezoensis Carr) by dendrochronological methods" pps
... widths and wood densities provide records of the effects of both climatic and nonclimatic factors on the radial growth of trees It is possible to evaluate the effects of nonclimatic factors on the ... soft X-ray densitometry (I): the effects of air-pollution on annual ring structure, Mokuzai Gakkaishi 24 (1978) 429-434 [25] Peterson D.W., Peterson D.L., Effects of climate on radial growth of ... the regression equations of the response functions The response functions used for the calibration of estimated indices were calculated for the period from 1924 to 1965 (calibration period),...
Ngày tải lên: 09/08/2014, 04:20
Báo cáo y học: " Diametrically opposed effects of hypoxia and oxidative stress on two viral transactivators" pdf
... and split as in A were exposed to the indicated concentrations of paraquot, and (D) β-mercaptoethanol Transactivation is expressed as a percent of expression under control conditions Chelation ... under normoxic (control) conditions Hypoxia increased transactivation by EBNA1 increased to 125% of normoxic conditions, but decreased transactivation by Tat to 25% of normoxic conditions (B) Immunoblots ... reporter expression was assayed and is indicated as percent of reporter expression observed in the absence of menadione or paraquot (control conditions) As observed previously [18], menadione (Figure...
Ngày tải lên: 12/08/2014, 04:20
Báo cáo y học: "Pharmacoproteomic study of the effects of chondroitin and glucosamine sulfate on human articular chondrocyte" pot
... PG content and matrix modulus when they are directly supplemented with high concentrations of the combination of GS and CS (500 μg/ml and 250 μg/ ml, respectively), resulting in a reduction of ... decrease of heme oxygenase, and indicated that the influence of GS and CS on oxidative stress is a possible mechanism of action for its protective effect on chondrocytes [55] Conclusions Taking ... tested different concentrations of both drugs in the standardization step of the proteomic analysis (CS from 10 to 200 μg/ml and GS from to 10 mM), and selected the highest concentrations in order...
Ngày tải lên: 12/08/2014, 14:22
Báo cáo y học: "The immediate effects of local and adjacent acupuncture on the tibialis anterior muscle: a human study'''' pdf
... electric stimulation and strength in the local and adjacent (relatively distant) regions of this muscle http://www.cmjournal.org/content/3/1/17 Figure Flow diagram of the local and adjacent acupuncture ... rotation) was employed at an insertion depth of approximately 1.5 cm The duration of a treatment session was 20 minutes The needles were stimulated during the first two minutes and for one minute ... table support and the dominant-side foot by a non-elastic material The foot remained in slight plantar flexion due to the limitation in dorsiflexion range of motion (ROM) that the non-elastic material...
Ngày tải lên: 13/08/2014, 15:21
effects of climate and ocean conditions on the marine survival of irish salmon (salmo salar, l.)
... climate and ocean conditions, with effects on the marine ecosystems of the north Atlantic (Beaugrand and Reid 2003; Jonsson and Jonsson 2004; Friedland et al 2005) Links between the environmental conditions ... covariance of the populations i and j for a given year, and δi δj is the product of the standard deviations of the populations i and j The mean synchrony, or the average value of the cross-correlation ... which there are strong indications of density-independent mortality (Jonsson and Jonsson 2004) In addition, synchrony can also be the result of dispersal or migration (Hanski and Woiwod 1993; Holmes...
Ngày tải lên: 13/11/2014, 09:14