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Reversed phase
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Part 1 book "Electricity 4 AC/DC motors, controls, and maintenance" includes content: The DC shunt motor, the DC series motor, DC compound motors, summary review of units 1–3, manual starting of DC motors, electronic DC motor control; basic principles of automatic motor control; the DC cemf motor controller and DC variable speed motor drives, dynamic braking with a DC motor reversal control, summary review of units 5–9, electromechanical and solid state relays and timers, the three phase, squirrel cage induction motor, starting three phase, squirrel cage induction motors.
159p
dianmotminh01
20-05-2024
4
2
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Part 2 book "The complete laboratory manual for electricity" includes content: Transformer basics, single phase transformer calculations, transformer polarities, autotransformers, three phase circuits, three phase transformers, three phase motors, start stop push button control, multiple push button stations, forward reverse control, sequence control, jogging controls, on delay timers, off delay timers
235p
dianmotminh00
22-04-2024
10
5
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In this research, a mathematical model for the reverse supply chain of municipal waste in conditions of uncertainty based on the pattern of the Industrial Revolution 4 is presented. This supply chain is the levels of distribution centers, customers, collection centers, recycling centers and destruction centers.
6p
longtimenosee06
27-03-2024
3
2
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In this study, a simple, selective, and accurate analysis method was developed for the simultaneous determination of anti-inflammatory drugs (paracetamol and diclofenac) existing inlet and outlet of the wastewater treatment system. This method used solid-phase extraction (SPE) and reversed-phase high-performance liquid chromatography with a photodiode array detector (HPLC-PDA).
10p
vialfrednobel
21-12-2023
4
2
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The study "Quantification of vildagliptin in tablets using high liquid-performance chromatography" aimed to establish a fast, simple and economical determination procedure for vildagliptin content in tablets by reverse phase high-performance liquid chromatography (Rp-HPLC). Research method: Chromatographic conditions affecting vildagliptin analysis, such as solvent system, sample processing and optimization of chromatographic conditions, and mobile phase ratio... were investigated.
8p
giangnhanly
02-10-2023
7
2
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Using column chromatography with normal and reverse phase of silica gel as adsorbent, a new benzofuran derivative, pumiloside (1) together wiith seven known flavonoid glycosides, afzelin (2), astragalin (3), quercitrin (4), isoquercitrin (5), kaempferol 3-O-rutinoside (6), rutin (7) and kaempferol 3-O-sophoroside (8) were isolated from the leaves of Ficus pumila.
5p
vidoctorstrange
06-05-2023
2
1
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The main aims of this research are: To determine the phase inversion temperatures for the formation of oil-in-brine nanoemulsions at various salt concentrations using conductivity measurements; To prepare the nano-emulsions at PIT points, and study their stability by measuring their droplet size, polydispersity and size distribution using dynamic light scattering technique; To confirm the DLS results using Cryo-SEM technique;...
324p
runthenight07
01-03-2023
5
3
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This study focuses on the stability of nano-emulsions produced by phase inversion temperature method using n-Decane and n-Dodecane as the dispersed phase and pure water/brine as the aqueous phase (continuous phase). A non-ionic surfactant (Brij 30) was used in the preparation of the nano-emulsions. Three different types salt namely \(NaCl\), \(KCl\) and \(MgC{l_2}\) were used at different concentrations.
173p
runthenight07
01-03-2023
2
2
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In the present study, a method for simultaneously determination of cynarin and chlorogenic acid in leafves artichoke extract was undertaken to develop and validate. The procedure, based on the use of reversed-phase liquid chromatography with ultraviolet detection, is simple and rapid and provides accurate and precise results.
8p
viargus
03-03-2023
5
1
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In the present work, triacylglycerol and fatty acid compositions of Impatiens balsamina L. and Impatiens walleriana Hook.f. seed oils were determined using reverse phase high performance liquid chromatography with both refractive index and spectrophotometric detections. The presence of conjugated octadecatetraenoic moieties was confirmed by UV and IR spectroscopy. Triacylglycerol (TAG) compositions were performed using an incremental approach and confirmed by the results of MS and electronic spectra.
15p
lyhuyenthu
31-01-2023
5
2
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In this study, antimicrobial nanofibers were produced with the mixtures of polyvinyl alcohol (PVA) and cyclotide-rich fractions by electrospinning method. After extraction, the first separation was carried out with C18 flash chromatography and then fractioned into five separate parts by reversed-phase high-pressure liquid chromatography (RP-HPLC). The molecular weights of cyclotides in each fraction were determined by quadrupole time-of-flight liquid chromatography-mass spectrometry (Q-TOF LC-MS).
10p
lyhuyenthu
31-01-2023
5
1
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Fluorinated carboxylic acids have been in use as ion-pairing reagents for over three decades. It has been observed that ion-pairing reagents not only increase the retention of oppositely charged analytes on reversed-phase HPLC columns but also decrease the retention of similarly charged analytes.
8p
viginny
23-12-2022
8
3
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A proteomic workflow for a simple loss-less manual nano-fractionation (300 nL/fraction) for low μg sample amounts which avoids the need to dry down or transfer fractions to autosampler vials is shown to be feasible. It is demonstrated that the conventional procedure of drying samples down followed by reconstitution negatively affects the number of protein and peptide identifications.
10p
viginny
23-12-2022
8
2
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This was investigated for the enantioslective separation of different classes of pharmaceuticals namely - and -blockers, anti-inflammatory and antifungal drugs, norepinephrine-dopamine reuptake inhibitor, catecholamines, sedative hypnotics, anti-histaminics, anticancer drugs, antiarrhythmic drugs, flavonoids, amino acids, alpha-2 adrenergic agonist, adrenaline and miscellaneous.
9p
viginny
23-12-2022
6
3
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Fatty acyl-Coenzyme A species (acyl-CoAs) are key biomarkers in studies focusing on cellular energy metabolism. Existing analytical approaches are unable to simultaneously detect the full range of short- , medium-, and long-chain acyl-CoAs, while chromatographic limitations encountered in the analysis of limited amounts of biological samples are an often overlooked problem.
12p
viginny
23-12-2022
4
4
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We investigated and compared the robustness of supercritical fluid chromatography (SFC) separations of the peptide gramicidin, using either isocratic or gradient elution. This was done using design of experiments in a design space of co-solvent fraction, water mass fraction in co-solvent, pressure, and temperature.
11p
viginny
23-12-2022
7
3
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Increasing column/tubing aspect ratio has been shown in a feasibility study to improve column efficiency when operating in reversed phase mode. This paper contains a thorough investigation on how increases in mobile phase flow and centrifugal force field affect stationary phase retention and column efficiency (as measured by the resolution between adjacent peaks) for columns wound with rectilinear tubing of different aspect ratio.
11p
viginny
23-12-2022
5
3
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The influence of heterogeneity, however, cannot be studied experimentally. In this study, we employed two reversed phase columns with different retention mechanisms to show that by serially coupling the columns, the obtained thermodynamic parameters are not related to the results obtained on the respective individual columns.
7p
viginny
23-12-2022
5
3
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This research focuses on retention mechanisms in a LC column with C18 stationary phase when novel eluent additives (HFIP, HFTB and TFE as well as NFTB and perfluoropinacol) are used. The retention factors between novel eluent additives and conventional ones like ammonium acetate and ammonium bicarbonate at different eluent pH values were compared.
8p
viginny
23-12-2022
7
2
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The interactions and dynamic behavior of a select set of polar probe solutes have been investigated on three hydrophilic and polar commercial stationary phases using saturation transfer difference 1H nuclear magnetic resonance (STD-NMR) spectroscopy under magic angle spinning conditions.
13p
viginny
23-12-2022
7
3
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