Synthesis and characterization of poly(methacrylic acid-co- trimethylolpropane trimethacrylate) imprinted sorbent for analysis of biogenic amines

Publication date: Available online 10 November 2019Source: Materials Today CommunicationsAuthor(s): Monika Sobiech, Dorota Maciejewska, Piotr LulińskiAbstractIn this paper, poly(methacrylic acid-co-trimethylolpropane trimethacrylate) imprinted sorbent was constructed from equimolar amounts of cross-linker and selected ethylammonium methacrylates which were synthesized from respective ethylamines with very good yields (80-97%) prior to polymerization. The structure of resulted polymers was characterized by spectroscopy and thermogravimetry and the morphology was examined by scanning electron microscopy and porosity analyses. The adsorption behavior of obtained materials was evaluated towards various biogenic amines revealing significant difference in the binding capacities notably between tryptamine and norepinephrine (43.1 ± 5.2 to 14.3 ± 1.7 µmol g-1 and 20.2 ± 1.8 to 7.79 ± 0.68 µmol g-1 on MIP and NIP, respectively). Strong electrostatic interactions between analytes and MIPs could be recognized as the main forces responsible for adsorption but the effect of ethylammonium methacrylate was less expressive. Poly(methacrylic acid-co-trimethylolpropane trimethacrylate) prepared from 2-phenyethylammonium methacrylate was characterized by highest affinity towards model biogenic amine, dopamine (AF = 3.04) with heterogeneous population of binding sites. The analysis of the separation of dopamine from spiked artificial urine sample revealed...
Source: Materials Today Communications - Category: Materials Science Source Type: research

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This article gives an overview of the current results of PET with radiolabelled amino acids in therapy monitoring of standard therapy as well as various innovative approaches in the treatment of patients with cerebral gliomas.Expert opinion: Amino acid PET has proven to be helpful in therapy monitoring of gliomas, the costs are low in relation to the costs of therapy and the clinical benefit, and a widespread clinical use is highly desirable. PMID: 31829748 [PubMed - as supplied by publisher]
Source: Expert Review of Neurotherapeutics - Category: Neurology Tags: Expert Rev Neurother Source Type: research
ConclusionPatch testing is an effective method for detecting the relationship of oral lichenoid lesions with dental amalgams. Further studies should be done to support this hypothesis.
Source: Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology - Category: ENT & OMF Source Type: research
Publication date: Available online 13 December 2019Source: Journal of Cranio-Maxillofacial SurgeryAuthor(s): Qing-Xiang Li, Rong Yang, Yi-Fei Wang, Hong-Fang Sun, Hai-Bo Wang, Hao Liu, Yu-Xing Guo, Chuan-Bin GuoSummaryIn spite of the many imaging modalities used in clinics, the one that best reflects the true delineation of skull-base (infratemporal fossa, ITF) malignancies is still unknown. In order to compare the tumor recognition capabilities of different imaging modalities, established murine models and patients with skull-base tumors were evaluated by computer tomography (CT), magnetic resonance (MR) imaging, and fluo...
Source: Journal of Cranio Maxillofacial Surgery - Category: ENT & OMF Source Type: research
ConclusionsThe results indicated that the shear bond strength between the zirconia framework and veneering ceramic was higher after laser surface treatments than after milling alone or after airborne-particle abrasion. Laser treatment methods, particularly LX2 and LX3, could be considered reliable approaches for zirconia surface treatment.
Source: The Journal of Prosthetic Dentistry - Category: Dentistry Source Type: research
Publication date: Available online 13 December 2019Source: The Journal of Prosthetic DentistryAuthor(s): Yukihiro Takeda, Jessica Lau, Hesham Nouh, Hiroshi HirayamaAbstractDigitally fabricated dentures allow clinicians to provide new prostheses for edentulous patients in an efficient manner. One approach uses a replication technique where a prosthesis in need of minor alterations is used as a basis for the definitive prosthesis. Compared with conventional duplication techniques, this method allows for the predictable fabrication of accurate dentures in less time and with increased quality. In this clinical report, int...
Source: The Journal of Prosthetic Dentistry - Category: Dentistry Source Type: research
ConclusionsZirconia crowns made by using the CS3600 and the laboratory scanner with a conventional impression showed significantly better internal discrepancies than those made by using TRIOS3 and CEREC Omnicam.
Source: The Journal of Prosthetic Dentistry - Category: Dentistry Source Type: research
This study reveals an important mechanism of performance fading of Li–O2 battery and develops an efficient approach to increase the cycle life, which has thrown new insight into the design and construction of Li–O2 batteries with long lifespan.Graphical abstractA thorough investigation on the effects of CO2 accumulation during cycling of a Li–O2 battery employing RuO2/rGO cathode leads to realize a strategy to preload CO2 absorbent (CaO) into the battery, which has prolonged significantly the cycle lifespan.
Source: Nano Energy - Category: Nanotechnology Source Type: research
ImpediMed, a company based in Carlsbad, California, won clearance from the FDA for its SOZO device to assess protein calorie malnutrition. The condition can be common in cancer patients, so recognizing it before obvious symptoms, such as muscle wasti...
Source: Medgadget - Category: Medical Devices Authors: Tags: Medicine Sports Medicine Source Type: blogs
Publication date: Available online 12 December 2019Source: Progress in Natural Science: Materials InternationalAuthor(s): Karthik Kumar Chinnakutti, Vengatesh Panneerselvam, Durai Govindarajan, Ajith kumar Soman, Kuppusami Parasuraman, Shyju Thankaraj SalammalAbstractA simple and efficient solid iodination method has been proposed for the fabrication of p-type γ-CuI thin films. The structural, morphological, optical, electrical and electrochemical properties have been investigated in order to serve as an effective hole-transporting layer in solid-state solar cells. The fabricated films exhibited p-type conductivity w...
Source: Progress in Natural Science: Materials International - Category: Materials Science Source Type: research
Publication date: Available online 12 December 2019Source: Materials Today: ProceedingsAuthor(s): R. PugazhenthiAbstractEvery year, more than 10 million people have gone through orthopaedic surgery for repair or replacement of bone. Among these, 75% of patients are in a need to re-surgery due to improper implant sublimation replacement because of material failure and improper setting of the replaced materials. The implant materials need to be biocompatible with tissue growth and it should have good mechanical property. In this research work aims to produce a biocompatible polymer-based 3D scaffold models with zero defect a...
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research
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