determination of the ph of soil samples

... number of atoms of 242Pu is added to each sample The determination of 242Pu with the other Pu isotopes allowed the determination of the chemical yield of the experimental techniques and therefore the ... it came The behavior of the actinides in the environment can also be dependaent on the source of the contamination (DOE 1980) The source will dictate the chemical form and speciation of the isotopes, ... greatest in the northern hemisphere temperate regions, the deposition pattern of the SNAP-9A accident is entirely different Most (73%) of the SNAP-9A 238Pu was deposited in the southern hemisphere...

Ngày tải lên: 13/11/2014, 09:24

Ngày tải lên: 13/11/2014, 09:34

... samples from the Forêt d’Amance as Soil water content and wood color Examination of core samples revealed that the amount of available soil water influenced the color of Q robur but not Q petraea In ... internationales d’études du groupe polyphénols, 6-11 July 1986, Montpellier Singleton VL, Rossi JR (1965) Colorimetry of total phenolics with phosphomolybdicphosphotungstic acid reagents Am J Enol ... sampled at 2.8 m above the ground Work reported her is based upon the study of 480 oak cores selected from the original sample of 1600 So far, scientific investigations on these increment cores...

Ngày tải lên: 08/08/2014, 19:21

... favor of the deionization of analytes and to facilitate their distribution to the organic phase With the knowledge of the pKa value(s) of analytes would allow us to manipulate the acidity of the ... liquid-phase microextraction There are several parameters that affect the performance of LPME, namely the pH of the aqueous solution, the type of the polymer-based hollow fiber and the type of organic ... transfer of analytes) The viability of the drop also depends on the stability of the emulsion Emulsion rupture is usually due to emulsion swelling caused by the transport of the external phase into the...

Ngày tải lên: 10/11/2015, 11:00

... nutrient)] The ADC of dry matter, nutrients in the tested ingredient were calculated according to the following formulae: ADC of DM of test ingredient (%) = (ADC of DM of the test diet - 0.7 x ADC of ... in the quality of cassava meal sources between studies 3.3 The digestibility of ash The digestibility of ash (or crude ash) of three plant-ingredients is reported in table The digestibility of ... with standard error (SE) 989 Determination of the digestibility of some plant ingredients for grass carp (Ctenopharyngodon idella) Table The digestibility of protein of three plant - ingredients...

Ngày tải lên: 28/08/2013, 09:14

... those of other river water samples collected downstream of STPs Because the STP is located on a tributary of Tsurumi River, the EDTA concentration might be affected by dilution with the influent of ... upstream of the sampling site of Kamo River, EDTA was not detected in Kamo River sample On the other hand, in Shikoku region, EDTA was not observed in the river water samples The concentration of EDTA ... is one of the major sources of EDTA (Kari and Giger, 1996) This sampling site is located at about 150 m downstream from the effluent output of an STP and the contribution of effluent to the EDTA...

Ngày tải lên: 05/09/2013, 10:15

... was shown that the more accurate the beta dose evaluation is, the more reliable is the technique of thermoluminecence dating [5,6] Fig the measurement of the gamma dose rate using the radiometer ... dose rate (µR/h) Water in the pore of pottery or in the soil absorbs some parts of the radiation that would otherwise reach the thermoluminescent grains Alternatively, on the infinite matrix basis, ... determine the correct PDD (Pulse Decay Discriminator) setting The optimum setting is the setting where there is equal and minimum spill of alpha pulses into the beta MCA and beta pulses into the alpha...

Ngày tải lên: 13/02/2014, 04:20

... study of the roots of trees is practicable, some knowledge of their forms, varieties, and parts is important The great office of the roots of all plants is the taking in of food from the soil ... etc The taste and odor of the bark are characteristics worthy of notice: the strong, fragrant odor of the Spice-bush; the fetid odor of the Papaw; the aromatic taste of the Sweet Birch; the bitter ... grow in one of two ways; either at the end of the branches, being then called terminal, or in the axils of the leaves, then called axillary The stem of a solitary flower or the main stem of a cluster...

Ngày tải lên: 13/02/2014, 12:20

... calculating the pH dependence of the free energy of folding is [19,31,54,55]: DDG folding ¼ 2:3kT pH Z DqdpH ð7Þ pH1 where, pH1 and pH2 determine the pH interval and Dq is the change of the net charge of ... broad range of pHs to be compared The origin of the optimum pH The position of the optimum pH depends on the amino acid composition and on the organization of the amino acids within the 3D structure ... than the pH of maximum of the free energy of unfolded state The points offset from the diagonal manifest the importance of the 3D structure In each case where the 3D structure causes a shift of the...

Ngày tải lên: 19/02/2014, 12:20

... below pH 6.0 due to the protonation of His57 Ne2 These results not contradict the pH- activity profile of API shown in Fig Ion strength dependence of the pH- activity curve of API The pH- activity profiles ... nucleophilicity of the Ser194 hydroxyl oxygen Accordingly, the Asp113–His57 diad is primarily important for the expression of the nucleophilicity of the catalytic Ser194 The ˚ side-chain of Asp113 ... Trp169 was supported by the independency of the ionic strength of the pH- activity curve (Fig 5) In the X-ray crystal structure, the Trp169 side-chain is located on the outside of the His210 side-chain...

Ngày tải lên: 21/02/2014, 03:20

... to binding by analyzing the surface of the residues covered by the protein They also see an interaction of the C-terminal part RPAP with the surface of the antibody In the shorter peptide that ... 36% of the interaction of the full peptide with the binding cavity of SM3 The sizes of the surfaces were determined using distances between ligand ˚ atoms and protein atoms of less than A These ... reference pairs The build-up of the trNOE between Asp2-b and b¢ is much faster than that of the other two reference points indicating differences of the rotational correlation times of these proton...

Ngày tải lên: 21/02/2014, 15:20

... nutrient)] The ADC of dry matter, nutrients in the tested ingredient were calculated according to the following formulae: ADC of DM of test ingredient (%) = (ADC of DM of the test diet - 0.7 x ADC of ... in the quality of cassava meal sources between studies 3.3 The digestibility of ash The digestibility of ash (or crude ash) of three plant-ingredients is reported in table The digestibility of ... with standard error (SE) 989 Determination of the digestibility of some plant ingredients for grass carp (Ctenopharyngodon idella) Table The digestibility of protein of three plant - ingredients...

Ngày tải lên: 25/02/2014, 10:20

... inuences the uorescence intensity Therefore, the inuence of the volume of buffer was measured Because the volume of buffer added (1.003.00 mL) had little effect on the uorescence intensity, 2.00 mL of ... naphthyl uorophores The compound could be dissolved in aqueous solution and showed high binding ability because of the two adjacent bis(b-CD)s Because of the conformation of the linker of 1, the nitrogen ... range 5.006.50 Therefore, a pH of 6.00 was xed using NaCl Pi buffer The effect of the buffer is lost if too small a quantity is used Whereas if the amount of buffer is excessive, the ionic strength...

Ngày tải lên: 07/03/2014, 05:20

... effects and their pH dependence in MAO A pH pH Fig (A, B) pH dependence of the steadystate kinetic parameters of MAO A-catalysed oxidation of kynuramine at 20 °C (C, D) pH dependence of the reductive ... drawback, the pH profiles are still of qualitative value Based upon the assignment of the ionization in the ES complex to that of the bound substrate, it follows that the acid limb of the bell-shaped ... para-substitued phenylethylamines, and the slow phase was attributed to the release of the imine product from the reduced enzyme [17] Because the slow phase was only a minor component of the total...

Ngày tải lên: 07/03/2014, 06:20

... another section of the valley stretching from the town of Grande Isle to the town of Hamlin The two areas were delineated as the research site because they are areas that contain all four of the ... development of soils depends on five factors: the parent material; the climate; the biological forces; the relief or lay of the land; and time (1964) The kind of soil that develops depends on the interaction ... in the study areas From this determination, a derivative surficial geology map of the area was compiled The parent material the soil formed in, the landform the soil formed on, and the nature of...

Ngày tải lên: 08/03/2014, 23:20

... for the determination of trace elements on soil and sediment fractions are used to allow a direct assessment of the different phases in soils and the determination of trace elements bound to these ... on the purpose of the study, as does the choice of the single extractant in each step in a sequential scheme The selectivity of the procedure can be considerably improved by incorporation of the ... been developed during the past 20 years for the determination of binding forms of trace metals in sediment The lack of uniformity of these schemes, however, did not allow the results so far to...

Ngày tải lên: 15/03/2014, 23:56

... VNU Journal of Science, Mathematics - Physics 24 (2008) 81-87 elsewhere The purpose of the present work was to investigate the energy spectrum of bremsstrahlung photons emitted from the thin W ... gamma photopeak area and detection efficiencies at the photopeak energy The average activity of the activation foils served as photon flux to which the foils were exposed The relation between the ... number of target nuclei; ε is the photopeak efficiency of the detector; Iγ is the branching ratio or intensity of the gamma ray ; λ is the decay constant; F is correction factor; ti is the irradiation...

Ngày tải lên: 22/03/2014, 11:20

... ((1/T )) = the | · |∞ -completion of k an algebraic closure of k∞ the | · |∞ -completion of k∞ the algebraic closure of k in C∞ ¯ a fixed choice in k of a (q − 1)st root of −T the subring of the power ... Let I ⊂ L be the GCM type of H with respect to L Let r be the cardinality of the set of ¯ ideals of L that are G-conjugate to I Then H0 is of rank ≥ r over k[t] Proof By Theorem 4.6.6 there exist ... |a(n) |∞ < ∞ n=0 Therefore the radius of convergence of each entry of ψ is infinite 3.1.4 Remark Theorem 3.1.1 is in essence the (dual) t-motivic translation of Yu’s Theorem of the t-Submodule...

Ngày tải lên: 22/03/2014, 16:20

... failure of the primer 2–DNA template hybrid primer extension reaction was due to the effects of the hairpin structure on the process of primer annealing to the DNA template Analysis of secondary ... DNA due to the unpaired 3¢-end of the primer, until the ÔGGÕ bases in the hairpin stem are freed by elevating the reaction temperature and paired with the ÔCCÕ bases at the 3¢-end of primer In ... extension at 22 °C Fast annealing may decrease the likelihood of the self-folding of the template DNA, while it may increase the probability of primer binding to the template DNA By contrast, slow annealing...

Ngày tải lên: 23/03/2014, 13:20

... study is the first to determine the full structure of glycoglycerolipid in thermophilic bacteria Meiothermus spp The structural information will be very useful for further investigations of the mechanisms ... anteiso-branched glycerol diethers of the thermophilic anaerobe Thermodesulfotobacterium commune Syst Appl Microbiol 4, 1–17 Huber, R & Stetter, K.-O (1992) The order Thermotogales In The Prokaryotes (Balows, ... were removed and the amino group was acetylated (B) MS/MS spectra (+ev) revealed the sugar sequence of the tetraglycosyl glycerol Fig The 500 MHz spectra of 1H NMR and 1D TOCSY of the N-acetyl tetraglycosyl...

Ngày tải lên: 23/03/2014, 13:20