determination of flame retardants in environmental samples

... Trang 1Determination of Natural Radioactivity in Soil Samples around Gold Mining Area in Khamkeut District, Bolikhamxay Province,Laos Using Gamma Ray Spectrometer with ... standard samples, the element aik of matrix of instrument respone a ik is determined according to the following equation: 1, 2,3 i ik k n A   (5) From three standard samples(defined in table ... concentration of 40K,226Ra, 232Th in the soil samples collected in the gold mining areain Khamkeut district closely than with each other soil samples Bolikhamxay province,Laos [6] The values of mean

Ngày tải lên: 27/01/2021, 06:02

... DETERMINATION OF ENDOCRINE DISRUPTING COMPOUNDS IN ENVIRONMENTAL SAMPLES USING MICROEXTRACTION COMBINED WITH CHROMATOGRAPHY/MASS SPECTROMETRY CHANBASHA BASHEER NATIONAL UNIVERISITY OF SINGAPORE ... BASHEER NATIONAL UNIVERISITY OF SINGAPORE 2004 GAS DETERMINATION OF ENDOCRINE DISRUPTING COMPOUNDS IN ENVIRONMENTAL SAMPLES USING MICROEXTRACTION COMBINED WITH CHROMATOGRAPHY/MASS SPECTROMETRY CHANBASHA ... Protected SPME of Triazine Herbicides in Bovine Milk and Sewage Sludge Samples, J CHROMATOGR A (2004), 1047 (2): 189-194 [5] C Basheer and H K Lee Determination of Endocrine Disrupting Alkylphenols

Ngày tải lên: 16/09/2015, 17:12

... mean value of 41% of total PBDE burden Their contribution was lower in the case of the River Evrotas, and was not detected or below mLOQ in 67% of sediment samples, indicating less use of the Deca-BDE ... series of samples Concentration levels of OPFRs in sediment samples were higher than those of HFRs in the all river basins studied Similarfindings were observed byBrandsma et al (2015)in their ... river basin are provided in Supporting Information (Table S1) In the case of the Evrotas river basin, sampling campaigns were con-ducted in June 2014 and July 2015, corresponding to two differentflow

Ngày tải lên: 04/12/2022, 15:57

... em-ployedforanalysis.SamplesusedtomeasuretheEFsoffungicides invineyardsoilswerecollectedatthebeginningofautumnand/or the endofwinter;thus, fungicideswere in contactwiththe soil since, at least, the end of the ... preparationscontainingjust MET-M AverageconcentrationsandEFs dataforsoil samplesare sum-marizedinTable4.Sampleswereobtainedfrom7vineyardsfrom 3 Designations of OrigininGalicia (NorthwestSpain).Inthiscase, ... allfungicideswerenoticedin,atleast,oneoftheinvestigated sam-ples Compounds dissipation was noticed in those points where pairs of samples were taken in autumn and at the end of win-ter (vineyards 1 to 4) Regarding

Ngày tải lên: 31/12/2022, 09:38

... make increase in number of bacteria-P and predominant when increase retention time [8] Moreover, T-P may be removed by the filtering of membrane [7] When MLSS increased, the efficiency of T-P ... concentration of ammonium in the influent was very high, 320 mg/L in average After 8 hours of aeration, almost of ammonium had not changed into nitrate or nitrite form, as a result was only 39 % (shown in ... settling well Settling ability of sludge (solid – liquid separation ability in reactor) is performed by SVI indicator The sludge with low SVI is good settling and concentrated SVI of sludge in

Ngày tải lên: 19/02/2017, 18:41

... simultaneous determination of a wide range of analytes in one single run In the first work on determination of pharmaceutical contaminants with CE-C4D, 13 pharmaceutical compounds in both anionic ... for determinations of active ingredients together with their counter ions or degradation products in pharmaceutical formulations [34-39] Simultaneous determination of cations and anions in these ... need for regular control of these contaminants in different water sources So far, various analytical methods for determination of pharmaceutical contaminants in different environmental matrices

Ngày tải lên: 16/12/2017, 05:50

... of expanded measurement uncertainty U (%) 13,72% 3.2 Investigation and evaluation of the determination of level of methyl mercury 3.2.1 Determination of concentration of methyl mercury using ... technique - Assess of the reliability of the method of determination of mercury speciation in sediment - Apply the result of study to determine forms of mercury in sediment at a certain area 3 The ... Evaluation of the reliability of result of the total mercury content in sample: Method validation and determination 2.4.3 Investigation and evaluation of the procedure for determination of methyl

Ngày tải lên: 09/01/2020, 15:31

... makes use of the addition of known amounts of analytes of interest to multiple aliquots of the sample and of another non-spiked, baseline aliquot, i.e., the “zeropoint” Then, after the samples ... Foundation of China (No 21572134) and the major project of CNTC [No 110201301026 (BR = 01)] Thanks for the helps of Lin Fang-Qing Competing interests The authors declare that they have no competing interests ... databases and retention Page of 11 indices Linear retention indices were obtained using gas chromatograms by interpolation between bracketing n-alkanes [28–30] A homologous series of n-alkanes (C-7 to

Ngày tải lên: 29/05/2020, 12:34

... contamination occurred during the fermentation process, which is one of the important processing steps of black tea in Bangla-desh In particular, it may occur during the CTC rolling steps involved ... Bangladesh is one of the leading tea producing and exporting countries in the world [8] In 2006, Bangladesh exported approximately 5 million kg of tea leaves, and this figure continues to increase even ... Digestion of soil samples Soil samples were oven dried at 60  °C for 24  h before being ground into a fine powder using a sterile mortar and pestle The samples (2.5  g) were transferred into a crucible

Ngày tải lên: 29/05/2020, 14:09

... simultaneous determination of codeine and diclofenac Talanta 116:1026–1032 24 Liu SC, Tsai TH (2002) Determination of diclofenac in rat bile and its interaction with cyclosporin A using on-line microdialysis ... 4  min), increased at 4  °C/min to 180  °C in 7.5 min and held there for 0.5 min (run time 12 min), then increased at 60 °C/min to 300 °C in 2 min and held there for 0.5  (run time 14.5  min) ... method for determination of diclofenac and 4′-hydroxydiclofenac in rat serum J Chromatogr B 830:231–237 20 Yilmaz B, Asci A, Palabiyik SS (2011) HPLC method for determination of diclofenac in human

Ngày tải lên: 29/05/2020, 14:27

... respectively The content of brimonidine tar-trate was calculated according to the peak area of brimo-nidine tartrate (about 4.3 min) in this study Brimonidine tartrate has high ratio of carbon to heter-oatom ... of brimonidine tartrate; b chromatogram for separation of brimonidine tartrate in standard solution; c chromatogram of brimonidine tartrate in commercial ophthalmic solution; d chromatogram of ... recovery of a series of measurements The calculated RSD values of the intra-day and inter-day assays were <1.0 and 1.2%, respectively The results of intra-day and inter-day preci-sion of the

Ngày tải lên: 29/05/2020, 15:16

... Declaration of 1992, governments and people of the global community reinforced their commitments to environmental sustainable society for the offspring of all human beings Especially, a number of new international ... purpose of this thesis is to examine how International Agreements envisage to contributing to conservation of the global environmental assets that are diminishing rapidly at an increasing rate In ... 2007 INTRODUCTION 1 Necessity of the thesis topic Reflecting the growing concerns of global community on rapid depletion of tropical forests, and responding to their determinations stated in Rio

Ngày tải lên: 17/09/2020, 23:45

... Declaration of 1992, governments and people of the global community reinforced their commitments to environmental sustainable society for the offspring of all human beings Especially, a number of new international ... purpose of this thesis is to examine how International Agreements envisage to contributing to conservation of the global environmental assets that are diminishing rapidly at an increasing rate In ... 2007 INTRODUCTION 1 Necessity of the thesis topic Reflecting the growing concerns of global community on rapid depletion of tropical forests, and responding to their determinations stated in Rio

Ngày tải lên: 28/09/2020, 22:28

... Declaration of 1992, governments and people of the global community reinforced their commitments to environmental sustainable society for the offspring of all human beings Especially, anumber of new international ... purpose of this thesis is to examine how International Agreementsenvisage to contributing to conservation of the global environmental assets that arediminishing rapidly at an increasing rate In order ... 2007 INTRODUCTION1 Necessity of the thesis topic Reflecting the growing concerns of global community on rapid depletion oftropical forests, and responding to their determinations stated in Rio

Ngày tải lên: 03/10/2020, 09:40

... provides procedures for determination of organic compounds in finished drinking water, source water, or drinking water in any treatment stage The method is applicable to a wide range of organic compounds ... surrogate in µg/L in the water sample Ax = integrated abundance of the quantitation ion of the analyte in the sample Ais = integrated abundance of the quantitation ion of the internal standard in the ... recovery of the internal standards in laboratory fortified blanks and samples Internal standard recovery should be in excess of 70% 9.5 With each batch of samples processed as a group within a 12-hour...

Ngày tải lên: 22/03/2014, 14:20

... determine the rate of biodegradation of specific contaminants in groundwater during a field study Mass flux of the studied contaminant through a line/cluster of wells (a transect) is recorded instead ... reached as a final timepoint, an earlier time was chosen for the kinetics calculation, if possible; the use of zero as a denominator in the first-order rate equation would result in an “infinite” value ... leveled off at that point for the remainder of the experiment, the final concentration and time were chosen at the point where the concentration leveled off In column studies, the time field in the...

Ngày tải lên: 28/03/2014, 19:20

... part is prepared in line with the guidelines of the Faculty of Social Sciences of the University of Dhaka (DU) 10 Figure-2.5.1: Distribution of Marks for Evaluation for the MEcon in Environmental ... highly trained economists in a growing economy like Bangladesh is increasing day by day Due to many emerging challenges pertaining to economic activities, particularly in the perspective of socio-economic ... ‘centre of excellence’ in a discipline like economics as encouraging research and getting them published in a systematic and scientific manner should be an integral part of an institute of higher...

Ngày tải lên: 31/03/2014, 03:20

... New findings out of the thesis This thesis presents the following new findings (1) New findings related to theory (a) A new economic equation to relate two levels of sustainable management of economic ... Original Sustainability, S for Sustainable Level for human activities ΔOS means the marginal increase of consumption against environmental amenity while original sustainability is maintained The degradation ... became increasingly criticized by international activists as a source of poverty and environmental degradation in developing countries One of the most important turning point was the WTO Ministerial...

Ngày tải lên: 20/04/2014, 20:22

... Table 1) of which the mRNA levels were mainly high in G2/M cells (Figure 4b) WEE1/MYT1/MIK1 kinases Figure Cyclin-dependent kinase cyclin-binding motifs Alignment of the cyclin-binding motifs of all ... th Number of proteins matching the cyclin HMMER profile 28 57 19 19 12 12 5 8 144 29 Number of proteins with an InterPro cyclin domain 27 55 18 18 12 12 5 140 27 IPR004367 Cyclin, Cterminal - - ... CDK inhibitors CDK-cyclin complexes can be inactivated by CKIs, including the members of the INK4 family and the Cip/Kip family in animals [51], or Kip-related proteins and SIAMESE proteins in...

Ngày tải lên: 09/08/2014, 20:21

... measure intracellular Ca2+ ions by using microscopy imaging techniques To introduce this dye into intact pistils, we injected the Fluo-3 solution directly into olive inflorescences To Page of 12 ... solution of mM Fluo-3 AM in DMSO The final DMSO concentration in the incubation solution was approximately 1% (v/v) Injection was done directly into the peduncle of the inflorescence at the site of ... and a fine needle (diameter, 60 μm) (Bionovo, Legnica, Poland) Into each inflorescence, 100 μl of dye solution was injected Control samples were injected with 100 μl of solution containing 1%...

Ngày tải lên: 11/08/2014, 11:21