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Substitution of polar functionalized compounds with silylated (e.g., trimethylsilylated) surrogates prior to GC/ MS analysis is a widely used analytical strategy. Calibration is a most demanding step of this strategy. In fact, a calibration function is usually acquired by converting known amounts of the pure analyte to its .. Read More
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Adjustment of Matrix-Assisted Laser Desorption/Ionization for Glycolipids
Gangliosides isolated from biological sources are usually detected as sodium/potassium adduct ions and these ions are easily fragmented by dissociation of labile glycosidic bonds in the positive ion mode Mass Spectrometry (MS). A large number of conditions for fragment suppression of these acidic glycolipids by using non-acidic .. Read More
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Microemulsification-Based Method: Coupling with Separation Technique
The outcomes described herein outline the potentiality of the microemulsification-based method (MEC) for development of rapid testing (point-of-use) technologies. MEC was recently proposed by these authors for analytical determinations wherein the detection is conducted in solution with naked eyes. It relies on effect of analyte.. Read More
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The carbon paste electrode was modified by electropolymerisation of 1 mM Glycine in 0.2 M Acetate buffer solution (ABS) at pH-5. The voltammetric response of Paracetamol (PA) at Poly(Glycine) Modified carbon paste electrode (MCPE) shows excellent electrocatalytic activity when compared to bare carbon paste electrode (BCPE) at sw.. Read More
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In the present work, an HPLC-UV method was set-up to allow the simultaneous quantification of the reduced- GSH, oxidised-GSSG and nitroso-GSNO glutathione species. Chromatographic separation was achieved on YMC ODS-A C18 column (150 × 4.6 mm, 5 μm), coupled to a Guard-c precolumn (YMC-Pack, 10 × 1-4,0 mm). The elu.. Read More
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PMMA Platform Based Micro Fluidic Mixer for the Detection of MicroRNA- 18a from Retinoblastoma Serum
Retinoblastoma (RB) is an eye cancer found in children. Early diagnosis of RB is very crucial for the treatment to be effective. miRNA 18a is highly expressed in the serum of RB patients which can be used as a diagnostic marker to detect RB. A pillar based micro mixer is designed and fabricated on PMMA platform to hybridize the .. Read More
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Nano Scale Potentiometric and Spectrophotometric Assays for 2,4-Dichlorophenoxyacetic Acid
The aim of this work was to investigate the ability of silicate wire ion selective electrode to measure 2,4 dichlorophenoxyacetic acid (2,4-D). The slope of the electrode was 56.2 mV decade -1 in the range from 10-6 to 10-2 M with lower limit of detection 8.3 × 10-7 M. The electrodes were successfully applied to determinat.. Read More
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Thermal and Physical Properties of Biofield Treated Bile Salt and Proteose Peptone
Bile salt (BS) and proteose peptone (PP) are important biomacromolecules being produced inside the human body. The objective of this study was to investigate the influence of biofield treatment on physicochemical properties of BS and PP. The study was performed in two groups (control and treated). The control group remained as u.. Read More
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Biopanning by bacterial display has many advantages over yeast and phage display, including the speed to discovery of affinity reagents and direct amplification of bound cells without the need to elute and reinfect. However, widespread use is limited, in part due to poor performance achieved using manual Magnetic-Activated Cell .. Read More
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Rapid LC-MS Compatible Stability Indicating Assay Method for Azilsartan Medoxomil Potassium
Azilsartan medoxomil potassium is a new generation antihypertensive drug comes under class of angiotensin receptor blockers. The present study focuses on developing a liquid chromatography-mass spectrometry compatible stability indicating assay method for determination of azilsartan medoxomil potassium in bulk drug and formulati.. Read More
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Plasma Treatment-Promising Tool for Preparation of Disposable Monolithic Columns
Atmospheric pressure plasma jet was employed to improve adhesion between polypropylene (PP) column wall and monolith used in chromatography. Different treatment conditions for modification of PP tube were used and the effects of treatment were analysed with X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM).. Read More
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Evaluation of the in-vivo concentration of monoclonal antibody (mAb) mixtures is a challenging task. Here we report the application of an LC-MS bioanalytical method to quantify in monkey serum the Sym004, an equimolar mixture of two monoclonal antibodies, 992 mAb and 1024 mAb. This method has been assessed accordingly to industr.. Read More
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Introduction: Lipopolysaccharides (LPS) or so-called endotoxins are potent pro-inflammatory compounds. LPS can be present in the bloodstream in case of septic conditions, leading to measure endotoxemia that is the activity of LPS in plasma. Recent research also reveals a low-grade or so-called metabolic endotoxemia associat.. Read More
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Carbohydrates are the principal sources of nutrient and energy in large-scale submerged fermentation processes. A method for detection and quantification of sugar levels are very advantageous because they can be considered as key indicators in determining the yields and the productivity of the process. For this reason, the objec.. Read More
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This study systematically investigated the cell proliferation rates, spheroid structures, cellular responses to different anti-cancer drugs, the expression of drug action-related proteins, and the possible correlations among these properties of 3D spheroids on Matrigel in comparison to 2D monolayer cells, using two cancer cell l.. Read More
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A rapid, simple and sensitive method for the determination of finasteride using sodium 1,2-naphthoquine-4- sulfonate (NQS) has been developed. The method is based on the fact that a brown product can be formed by the reaction between finasteride and sodium NQS in a buffer solution of a pH 13.0. Beer’s law is obeyed in the .. Read More
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Microcontrolled systems coupled biosensors have attracted attention. Here, we describe an automated and portable microcontrolled pumping flow system (μC-PFS) developed to biosensing application. The flow system is fully automatic, portable, it works in battery module and it dispenses the use of microcomputer and the manual op.. Read More
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A highly sensitive method has been developed for the quantitation of polysorbate 20 (PS20) and 80 (PS80) in therapeutic peptide formulations. A mixed-mode HPLC column was used to separate polysorbates from the peptide and other excipients, and a charged aerosol detector (CAD) was used for the detection. The method was capable of.. Read More
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A Highly Adaptable Method for Quantification of Peptidyl-tRNA Hydrolase Activity
The emerging importance of Peptidyl-tRNA hydrolase (Pth) enzymes necessitates the need for a widely applicable functional assay to further studies of this important enzyme family. Previously reported methods for monitoring Pth function suffer from limitations of cost, time, substrate availability, and application compatibility. .. Read More
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Urinary Excretion and Renal Clearance of Allopurinol in Female Gout Patients
Drugs are excreted from the human body either unchanged or as metabolite. Gout is treated with allopurinol drug which lowers uric acid level in humans. Xanthine oxidase activity is inhibited with allopurinol which converts hypo-Xanthine and xanthine into uric acid. In case of kidney impairment monitoring of allopurinol drug meta.. Read More
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