high performance anion exchange chromatography of oligosaccharides

... the efficiency of a diverse set of NADES for the extraction of compounds of interest from two model plants, Ginkgo biloba and Panax ginseng The method uses high- performance thin-layer chromatography ... of Chromatography A, 1532 (2018) 198–207 Contents lists available at ScienceDirect Journal of Chromatography A journal homepage: www.elsevier.com/locate/chroma Broad range chemical profiling of ... complex process, consisting of several steps that involve the use of large volumes of organic solvents Unfortunately, most of these solvents are banned in the use of products for human consumption...

Ngày tải lên: 31/12/2022, 09:41

... Standard deviation of residuals Standard deviation of intercept Standard deviation of slope Limit of detection Limit of quantitation 124 M.A Korany et al Table Evaluation of the precision and ... with high sensitivity Fig shows the typical Fig 127 chromatogram of a laboratory-made mixture of the three compounds The method permitted adequate resolution of Variation of the retention times of ... content led to loss of resolution and overlapped peaks in some cases Effect of pH The influence of the pH of the mobile phase was studied by using mobile phases consisting of mixtures of methanol and...

Ngày tải lên: 14/01/2020, 22:24

... Journal of Chromatography A 1621 (2020) 461054 Contents lists available at ScienceDirect Journal of Chromatography A journal homepage: www.elsevier.com/locate/chroma High- performance liquid ... representatives of the complete set of analytes of this study To avoid the generation of an unnecessary large data set among the nine polysaccharide-based CSPs, four of them were selected on the basis of ... concentration of alcohol serves most often for the modulation of the chromatographic behavior (i.e., retention and stereoselectivity) in NPM [33–36] To study the effect of the nature of alcohol...

Ngày tải lên: 25/12/2022, 00:52

... Accepted 22 July 2021 Available online 30 July 2021 Keywords: Single-use chromatography Anion exchange (AEX) chromatography Polishing chromatography Monoclonal antibodies (MAbs) Downstream processing ... AEX media bed consisting of layers of Q-functional nonwoven, having a combined bed depth of 0.35 cm, and layers of Gu-functional membrane having a combined bed depth of 0.14 cm Efficiency tests ... plastic annular ring with an inner diameter of 19 mm and an outer diameter of 25 mm was placed on top of J.F Hester, X Lu, J.D Calhoun et al Journal of Chromatography A 1654 (2021) 462445 pre-use...

Ngày tải lên: 25/12/2022, 02:45

... Journal of Chromatography A 1670 (2022) 462974 Contents lists available at ScienceDirect Journal of Chromatography A journal homepage: www.elsevier.com/locate/chroma Enantioselective high- performance ... the work of Felinger et al., we designed a systematic study to reveal further details of the applicability of the van’t Hoff approach in enantioselective chromatography, where the effect of temperature ... separations of enantiomers in high- performance liquid chromatography, J Chromatogr A 1572 (2018) 37–43, doi:10.1016/j.chroma.2018 08.027 [16] J.M Lin, T Hobo, Inspection of the reversal of enantiomer...

Ngày tải lên: 25/12/2022, 02:54

... retention time of isonaringin would be less than that of naringin. An extracted ions chromatography (EIC) of m/z 579.00 and m/z 609.00 to demonstrated that the peaks at reten- tion times of 9.3 and ... the abundance of fragments at m/z 258. One of the two ions was generated at carbon 4' of B-ring while the other was formed involved carbon 4 of C-ring. The two ions formula of m/z 258 both ... identification method. Instruments and conditions High- performance liquid chromatography- diode array detection (HPLC-DAD) analysis was performed on a liq- uid chromatography system (Agilent 1100 Series,...

Ngày tải lên: 13/08/2014, 15:21

... detectable levels of residues In India, Moharana et al., (2015) reported the presence of enrofloxacin residues in 21% milk samples out of 120 samples analysed The concentration of each of the antimicrobial ... antimicrobials with highest occurrence of norfloxacin residues followed by enrofloxacin residues In the present study, none of the milk sample was found positive for ciprofloxacin residues However, ... Spain for detection of quinolones and β-lactams in milk using LC, 3% samples were found to be positive for quinolones out of 49 samples analysed A very high prevalence of 87.3% of flouroquinolones...

Ngày tải lên: 13/01/2020, 23:30

... Journal of military pharmaco-medicine no9-2019 DEVELOPMENT AND VALIDATION OF HIGH PERFORMANCE LIQUID CHROMATOGRAPHY METHOD FOR THE DETERMINATION OF NIFEDIPINE IN DRUG - EXCIPIENT ... Thus, the specified range of the method was 120 - 180 µg/mL * Determination of limit of determination and limit of quantification: The limit of detection and limit of quantification were estimated ... Vietnamese Ministry of Health Circular 32/2018, Regulate the registration of drugs and drug materials Uday Y.A et al Estimation of nifedipine by reverse phase high performance liquid chromatography...

Ngày tải lên: 14/01/2020, 21:45

... productivity of LPZ in serum: Table 8: Extraction productivity of LPZ in serum (n = 6) Parameters Mean of peak area (mAU.s) % RSD Concentration of 0.5 µg/mL Concentration Concentration of 1.0 µg/mL of ... Journal of military pharmaco-medicine no2-2018 DETERMINATION OF LANSOPRAZOLE IN DOG PLASMA USING REVERSED PHASE -HIGH PERFORMANCE LIQUID CHROMATOGRAPHY Luong Quang Anh*; ... Assessment of PPZ extraction productivity at its concentration of µg/mL was used Table 9: Extraction productivity of PPZ in serum (n = 6) Samples Peak area of PPZ in MP (mAU.s) Peak area of PPZ in...

Ngày tải lên: 23/01/2020, 10:46

... the high- resolution data sets Iterative cycles of refinement and manual fitting were carried out using programs CNS [24] and O [25] To monitor the progress of the refinement, a total of 10% of the ... shape of the tetrahedral corresponding to the sulfate ion In the final model, two conformations of residues A10, B10 and A123 of CTX were refined There were also signs of other conformations of surface ... (Table 4) The higher frequency of charged residues is involved in increasing the number of polar interactions Secondary structures Facchiano et al [41] observed that 69% of the a-helices of thermophilic...

Ngày tải lên: 20/02/2014, 23:20

... is a registered trademark of Computers and Structures, Inc SAP2000 is a registered trademark of Computers and Structures, Inc Windows is a registered trademark of Microsoft Corporation Adobe and ... selection The Properties of Object pop-up box for frames will appear as shown in Figure 10 Figure 10 Properties of Object box If the Properties of Object box is covering any part of the model in either ... starting point in your exploration of this powerful and comprehensive version of SAP2000 Using this Manual 1-1 Introductory Tutorial for SAP2000 Version Overview of the Program SAP2000 is a stand-alone...

Ngày tải lên: 06/09/2012, 15:56

... unmatched in terms of ease -of- use and productivity Creation and modification of the model, execution of the analysis, and checking and optimization of the design, and production of the output are ... Groups A group is a named collection of objects It may contain any number of objects of any number of types Groups have many uses, including: Quick selection of objects for editing and assigning ... definitions of display views, sets of output tables, document formats, and function plots as part of a model Combined with the use of groups, this can significantly speed up the process of getting...

Ngày tải lên: 01/04/2014, 03:20

... factor of 18.8% and an Rfree of 22.3% with over 90% of the residues in the most favored region of a Ramachandran plot (Table 2) The resulting model is depicted in Fig The Ca backbones of the ... shown) Interestingly, the general location of the N-terminal domains of these two outliers [35,36] corresponds to that of CDase A superposition of the highly variable B domains, which participate ... TVA-II group As the polypeptide superposition of Fig places the three catalytic residues of CDase (Fig 1) within less than ˚ A of the positions of those of TVA-II, and as the active centers closely...

Ngày tải lên: 08/03/2014, 02:20

... harvested after 24 h of culture on 2% (w/v) glucose, by using the method of Raeder & Broda [33] Amplification of a DNA fragment encoding a portion of the catalytic domain of T emersonii cel7 was ... structure solution of the native enzyme Family contains both CBHs and endoglucanases The structure of CBHs is distinguished from that of endoglucanases by the presence of loops of polypeptide chain ... 55, 303–315 46 Littlejohn, T.G & Hynes, M.J (1992) Analysis of the site of action of the amdR product for regulation of the amdS gene of Aspergillus nidulans Mol Gen Genet 235, 81–88 47 Johnson,...

Ngày tải lên: 23/03/2014, 13:20

... 2002 3D modelling of Neurospora H+-ATPase (Eur J Biochem 269) 5255 of internal cavities capable of containing water molecules in the homologous Rossman fold of the soluble members of the HAD superfamily ... middle of the a/b Rossman fold, down to the Fig Position of internal polar cavities in the Rossman fold of PMA1_NEUCR and two other soluble members of the HAD superfamily (A) Phosphorylation site of ... resolution X-ray structure of ATC1_RABIT (RSCB-pdb code: 1EUL) [8], a first model of PMA1_NEUCR was generated with the PromodII [29] package of DEEPVIEW 3.7 [30] Reconstruction of the loops in gap regions...

Ngày tải lên: 23/03/2014, 21:20

... (full-width at half maximum) of tens of nanometers, and its peak intensity can be orders of magnitude higher than a circularly-shaped aperture with a similar level of field confinement [3] Bowtie ... (FEM) simulations of the near-field performance of the apertures These are found to be in good agreement Experimental Setup and Sample Preparation Figure shows the schematic of our home-made illumination-collection ... The aperture has a size of 260 nm × 260 nm and has a gap of 62 nm (B) SEM image of the NSOM probe The hole on the tip is around 150 nm in diameter (C) Simulation model of bowtie nanoantenna Its...

Ngày tải lên: 06/05/2014, 08:54

... (full-width at half maximum) of tens of nanometers, and its peak intensity can be orders of magnitude higher than a circularly-shaped aperture with a similar level of field confinement [3] Bowtie ... (FEM) simulations of the near-field performance of the apertures These are found to be in good agreement Experimental Setup and Sample Preparation Figure shows the schematic of our home-made illumination-collection ... The aperture has a size of 260 nm × 260 nm and has a gap of 62 nm (B) SEM image of the NSOM probe The hole on the tip is around 150 nm in diameter (C) Simulation model of bowtie nanoantenna Its...

Ngày tải lên: 06/05/2014, 08:58

... area |c| of the polyomino c is the number of its unit squares We denote by Cn the set of all the polyominoes of area n The perimeter P (c) of a polyomino c is the number of unit edges of the dual ... the integer n is of the form l(l + ) or l(l + ) − figure 2.16: two elements of M23 Conversely, we will examine for these particular values of n the possible actions of the sequence of transformations ... decomposition of l1 l2 Any polyomino obtained by removing successively m < k corners from l1 × l2 is minimal Proof The removal of a corner cannot increase the perimeter of a polyomino The perimeter of...

Ngày tải lên: 07/08/2014, 06:20

... mixture of chloroform and methanol (2:1 [v/v]) After extraction, 0.2 volumes of 0.9% NaCl solution were added and the chloroform-containing phase was collected After evaporation of the chloroform ... that is considered to correspond to a cluster of quantum dots Figure 3-D model of the nucleus of the same MCF-7 cell as in Fig 3-D model of the nucleus of the same MCF-7 cell as in Fig The translucent ... (page number not for citation purposes) Journal of Nanobiotechnology 2006, 4:10 Figure 3-D model of the nucleus of a PC12 cell 3-D model of the nucleus of a PC12 cell The translucent surface and small...

Ngày tải lên: 11/08/2014, 00:22

... Page of 13 Fabrication of AuNPs AuNPs were prepared by using the reduction of chloroauric acid (H[AuCl4]) solution [16,17] Different diameters of AuNPs were made by using different ratios of chloroauric ... different sizes of AuNPs in an array of 500-nm-holes The scattering of AuNPs in the hole can be used to mimic the scattering of AuNP aggregate in the vesicle The preparation of the samples were ... the radius of the nanoparticle, l is the incident wavelength, n is the refractive index of environmental medium and εr and εi are the real and imaginary parts of the dielectric constant of the nanoparticle,...

Ngày tải lên: 11/08/2014, 00:22