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93 articles for “Molecular weight”
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Determination of Accurate Molecular Weights of Cationic Polyacrylamide Polymers through Advanced Gel Permeation Chromatography Triple Detection Technique
Abstract: AbstractGel permeation chromatography along with refractive index detector or UV detector provides relative molecular weight information along with PDI with respect to standard used. If standards are of different nature than sample such relative results just are used to compare polymers and co-polymers among themselves. These detectors fail to reveal information about other important polymer characters like size of polymer in solution (hydrodynamic volume), branching pattern and intrinsic viscosity which …
Published in Journal of Polymer & Composites · Vol. 2, Issue 2, 2023 · pp. 24–28 Read article
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Peroxide Modification of Polyolefins and Long Chain Branching and Molecular Weight Distribution Comparative Studies Thereof using HTGPC
Abstract: AbstractThe modification of polypropylene by combined use of peroxides and multifunctional components (MFC) is widely carried in order to introduce the long chain branching in the polymer. The presence of long chain branching in the polymer structure have effect on the processability, the melt strength and hence, the end-use of polyolefin polymers. The high temperature gel permeation chromatography (HTGPC) is widely used technique in the estimation of molecular weight, molecular …
Published in Journal of Polymer & Composites · Vol. 4, Issue 1, 2016 · pp. 9–15 Read article
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Experimental Investigation of Flexural Strength and Impact Strength of Friction Stir Welded Ultrahigh Molecular Weight Polyethylene (UHMWPE)
Abstract: Friction stir welding (FSW) is a solid-state process in joining thermoplastic materials. Polymers are engineering materials used for future technological development as the polymer processing and fabrication techniques have developed plastic products and components in major industries. Utilization of ultrahigh molecular weight polyethylene (UHMWPE) material in engineering structures has increased because of its low weight, high specific strength, chemical resistance, design flexibility, corrosion resistance and reduced manufacturing costs. In present …
Published in Journal of Mechatronics and Automation · Vol. 2, Issue 3, 2015 · pp. 8–15 Read article
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Composite Gel-Fibers and Solid-State-Processed Tapes Based on Disentangled Ultra-High Molecular Weight Polyethylene and Electrically Conductive Carbon Black: a Comparative Study
Abstract: In this study, oriented nanocomposite gel-spun fibers and solid-state-processed tapes were manufactured and analyzed. The fibers and tapes were produced using a specific type of nascent disentangled ultra-high molecular weight polyethylene (UHMWPE) reactor powder. As the filler, commercially available electrically conductive carbon black (CB) was used. The ultra-high filler content values up to 75 wt.% were achieved for the UHMWPE/CB gel-spun fibers, while the degree of filling was limited (up …
Published in Journal of Polymer & Composites · Vol. 13, Issue 1, 2025 · pp. 151–165 Read article
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Studies on Mechanical Properties of Ultra High Molecular Weight Poly Ethylene (UHMWPE)-Basalt Fiber Reinforced Hybrid Polymer Matrix Composites
Abstract: Composite materials have become a preferred material now days because of their strength and also they are light. An additional material can be produced by a combination of matrix and reinforcement. The connections also give the flexibility of the design, because many of them can be formed in complex shapes. The economic significance of composite materials is now illustrious. There is strong indication far and wide that this importance will …
Published in Journal of Polymer & Composites · Vol. 7, Issue 3, 2019 · pp. 8–19 Read article
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Processing and Mechanical Characterization of Compression-Molded Ultrahigh Molecular Weight Polyethylene Biocomposite Reinforced with Aluminum Oxide
Abstract: Ultrahigh molecular weight polyethylene (UHMWPE) has been widely used as a bone implant material in orthopedic surgical applications in trauma due to its low coefficient of friction, good biocompatibility, and excellent wear and corrosion resistance properties in comparison to other polyolefins. But, due to the formation of wear debris, implants loosen and fail after 12–15 years of implantation. In order to enhance lifespan, the role of alumina (Al2O3) reinforcement on …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 4, Issue 3, 2014 · pp. 1–12 Read article
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Study on Preparation and Characterization of Ultrahigh Molecular Weight Polyethylene Nanocomposites Filled with ZnO Nanoparticles
Abstract: In order to create a completely flexible designed composite that makes it simpler to exhibit ideal mechanical and chemical properties, nano metal oxides are added to polymers as reinforcement. Polymer blends represent a crucial area in the management of innovative materials that outperform net polymers in terms of characteristics. Polymer mixes can provide components with lasting beneficial qualities, as opposed to what is possible with a single polymer equivalent. This …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 12, Issue 3, 2022 · pp. 1–11 Read article
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Development and Applications of a Simple Chalcone- Based Low Molecular Weight Ligand for Treating Nosocomial Infections due to Staphylococcus aureus and Escherichia coli
Abstract: Abstract Inspired from the available biological data of several imperative therapeutic scaffolds in several medicinal chemistry databases, thiophene-containing chalcone compounds were identified and the molecule was designed for treating various nosocomial infections. In one of the recent rational exploration, (E)-3-(4-methoxyphenyl)-1-(thiophen-2-yl)prop-2-en-1-one was synthesized in a single-step reaction, characterized comprehensively by using a few sophisticated spectroscopic instruments such as FT-IR spectroscopy, mass spectroscopy, and 1H-NMR spectroscopy, as well as CHN analyzer, and …
Published in Research and Reviews: A Journal of Medicine · Vol. 10, Issue 2, 2020 · pp. 14–18 Read article
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Synthesis, Characterization and Drug delivery Application of Poly (Safranine) based triblock copolymer
Abstract: Synthesis, characterization and humidity sensor application of poly(safranin) (PSaf) was carried out under inert atmosphere. The monomer to initiator ratio [M0/I0] was maintained accurately at 100. In order to improve the molecular weight and processability it was block copolymerized with bio-compatible and bio-degradable ε-caprolactone (CL) and water-soluble tetrahydrofuran (THF) separately. Thus, the derived triblock copolymer was subjected to humidity sensor application and the results are viewed in broad approach and …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 9, Issue 2, 2018 · pp. 1–7 Read article
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Nanocomposites of Polyethylene-Closite 20A: Preparation and Characteristics
Abstract: Low-density polyethylene/closite 20A nanocomposites with different organoclay contents were made in the current study by a melt mixing technique with two different compatibilizers of varying contents: low molecular weight oxidized polyethylene and low molecular weight trimethoxysilyl modified polybutadiene. The inclusion of compatibilizers and concentrations of organoclay were analyzed in relation to the mechanical and thermal properties of the nanocomposites. The dispersibility of the silicate clay in the nanocomposites was investigated …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 15, Issue 1, 2025 · pp. 01–12 Read article
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Depolymerization of Polypropylene: A Systematic Review
Abstract: AbstractPolypropylene have become an indispensable ingredient of human life and most widely used thermoplastic in commodity applications. Polymerization of propylene is carried out by using Ziegler-Natta or Metallocene catalysts, which results in high molecular weights and crystalline polypropylene which are not required for several applications. Reduction in molecular weight of polypropylene in conventional reactors is uneconomical and complicated. Therefore to overcome this problem researchers and technologists proposed a post reactor …
Published in Journal of Polymer & Composites · Vol. 4, Issue 2, 2016 · pp. 1–16 Read article
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Role of Enoxaparin in the Management of STEMI: An Indian Perspective
Abstract: Cardiovascular diseases are major causes of morbidity and mortality worldwide. Acute coronary syndrome is one of the main causes of hospital admissions. ST-elevation myocardial infarction is the severe dreaded ACS causing morbidity and mortality. Probably because of economic reasons, conventional heparin continues to be the main anticoagulant therapy in STEMI. Enoxaparin is safe and effective in the treatment of ST-elevation myocardial infarction. Various studies outline its efficacy and safety in …
Published in Research and Reviews: A Journal of Medicine · Vol. 2, Issue 1, 2012 · pp. 15–20 Read article
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Detection of Active Compounds in Ulothrix sp. Algae
Abstract: The study included the identification of some active chemical compounds from blue-green algae Ulothrix and the production of many active compounds using algae extract. Algae are a talented cause of defiant corpulence mediators, as plump positions are an international hazard to human wellbeing. It is also linked to metabolic syndrome, type 2 diabetes, heart disease and blood vessels, anti-obesity agents from algae are represented by four main compounds with (Phlorotannins, …
Published in Research and Reviews : A Journal of Biotechnology · Vol. 14, Issue 3, 2024 · pp. 39–43 Read article
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Development of Anti IgG Polyclonal Antibody Against Canine IgG and Their Roles in Diagnostic Purposes
Abstract: IgG plays an important part in immunological studies and also in living bodies for providing secondary immune response which triggers as passive immunization against harmful pathogens in dogs. Purpose: The aim of this investigation is to separate, identify, and refine immunoglobulin G from canine serum. Methods: Ammonium sulphate precipitation was used to separate the dog's serum, which was then concentrated over night in a dialysis bag inside of a refrigerator. …
Published in International Journal of Vaccines · Vol. 1, Issue 2, 2024 · pp. 01–06 Read article
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Hydrolysis-Driven Optimization of Hydroxypropyl Maize Starch for Improved Micro-Pellet Binding and Quick Solubility of Spirulina-Based Micro-Pellets
Abstract: Acid hydrolysis is a well-established approach for modifying the physicochemical properties of polysaccharides & macromolecules including hydroxypropyl Maize starch (HPMS). In this study, the effect of varying concentrations of hydrochloric acid on the partial hydrolytic degradation of HPMS (Lycoat RS-780) was investigated at 85°C for 4 h, yielding polymers of different molecular weights. The Acid-mediated degradation effects on polymer characteristics were systematically assessed using capillary viscometry and gel permeation chromatography …
Published in Research and Reviews: A Journal of Pharmaceutical Science · Vol. 17, Issue 2, 2026 · pp. 41–61 Read article
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Isolation, Purification and Characterization of Antimicrobial peptide produced by Saccharomyces boulardii №6569
Abstract: Object: To identify microorganisms that are newly isolated biologically and microbiologically and determine their characteristics by purifying AMP produced by yeast. Methods: We measured the antibacterial activity of AMP using microliquid dilution and turbidity methods and purified them using membrane filtration and gel filtration methods. The molecular weight of AMP produced by Saccharomyces boulardii was measured using Acquity UPLC SQD-2 and MS. Results: We confirmed that yeast-№18, identified biologically and …
Published in Research and Reviews: A Journal of Microbiology and Virology · Vol. 14, Issue 1, 2024 · pp. 7–18 Read article
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Ionic Conductivity of Chain Extension Supramolecular Polymer Material based on Reactive Hydrogen Bonding Motif
Abstract: AbstractSelf-assembly of low molecular weight oligomers possessing good mechanical properties at room temperature and having a low melt viscosity at elevated temperatures are of interest for many applications, such as hot melts and thermoplastic elastomers. Association between end groups can be based on a variety of secondary interactions, such as Vander Waals, hydrophobic, ionic interactions, or hydrogen bonding. A low molecular weight poly (ethylene glycol) (PEG) was functionalized with 2-Ureido-4[1H] …
Published in Journal of Polymer & Composites · Vol. 2, Issue 1, 2023 · pp. 30–36 Read article
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Anticancer Activity of Calotropis procera by Molecular Docking Analysis
Abstract: Cyclin-dependent kinase 2 (CDK2) is a protein synthesized by Calotropis procera. It is known to be responsible for causing cancer in the human body. Studies have presented the significance of the phytochemicals to inhibit the CDK2 protein. Adsorption, distribution, metabolism, and excretion (Swiss ADME) and PubChem were the pharmacological tools which were used to check molecular weight, which should be less than 500D, acceptors less than 10, and donors less …
Published in International Journal of Biochemistry and Biomolecule Research · Vol. 2, Issue 1, 2024 · pp. 01–07 Read article
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Formulation and Evaluation of Hybrid Polymer Films using Metformin as Model Drug
Abstract: The present work was to formulate transdermal films which can produce a constant and prolonged release of drug using Chitosan and polyethylene oxide. In the present study high molecular weight Chitosan (300 K) and Polyethylene oxide (600 K) were used.initially, pre-formulation studies were performed to check the solubility of drug and polymers. A suitable method was developed for the estimation of absorption maxima of the drug by UV double beam …
Published in Research & Reviews: A Journal of Drug Formulation, Development and Production · Vol. 5, Issue 1, 2018 · pp. 1–15 Read article
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Synthesis, Characterization, and Reactivity of Bivalent Tin(II) with 4-Tert-butylphenol
Abstract: Bivalent tin(II)-4-tert. butylphenoxide of composition Sn(OC6H4X-4)2(I), where X = But, has been synthesized by the reaction of stannous chloride (SnCl2) with bimolar amounts of 4-tert. butyl phenol (HOC6H4But-4) in the presence of the base, diethyl amine, in tetrahydrofuran (THF) solvent. The resulting complex was characterized by elemental analysis, molecular weight determination, molar conductance measurement, IR, and 1H NMR spectral studies. The reactivity of the newly synthesized complex (I) with HgCl2 …
Published in International Journal of Photochemistry and Photochemical Research · Vol. 2, Issue 1, 2024 · pp. 14–19 Read article