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PubMed Journals Articles About "Enhancing Hydrogel Based Long Lasting Chemiluminescence Platinum Metal" RSS

20:27 EDT 2nd April 2020 | BioPortfolio

Enhancing Hydrogel Based Long Lasting Chemiluminescence Platinum Metal PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Enhancing Hydrogel Based Long Lasting Chemiluminescence Platinum Metal articles that have been published worldwide.

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Showing "Enhancing hydrogel based long lasting chemiluminescence platinum metal" PubMed Articles 1–25 of 46,000+

Enhancing hydrogel-based long-lasting chemiluminescence by a platinum-metal organic framework and its application in array detection of pesticides and d-amino acids.

Organophosphorus pesticides (OPs) are harmful to people's health and d-amino acids (d-AAs) in the human body are closely related to various diseases. So, detection of OPs in foods and d-AAs in serum is important for food safety and clinical diagnosis. Herein, a long-lasting chemiluminescence (CL) imaging sensor was constructed for the detection of OPs and d-AAs. The method was based on N-(4-aminobutyl)-N-ethylisoluminol/Co2+/chitosan (ABEI/Co2+/CS) hydrogels, where metal organic framework materials (MOF-Pt)...


The Hydrogel Endovascular Aneurysm Treatment Trial (HEAT): A Randomized Controlled Trial of the Second-Generation Hydrogel Coil.

Aneurysm recurrence after coiling has been associated with aneurysm growth, (re)hemorrhage, and a greater need for follow-up. The second-generation HydroCoil Embolic System (HES; MicroVention, Inc) consists of a platinum core with integrated hydrogel and was developed to reduce recurrence through enhancing packing density and healing within the aneurysm.

Artificial Cells Capable of Long-Lived Protein Synthesis by Using Aptamer Grafted Polymer Hydrogel.

Herein we report a new type of artificial cells capable of long-term protein expression and regulation. We constructed the artificial cells by grafting anti-His-tag aptamer into the polymer backbone of the hydrogel particles, and then immobilizing the His-tagged proteinaceous factors of the transcription and translation system into the hydrogel particles. Long-term protein expression for at least 16 days was achieved by continuously flowing feeding buffer through the artificial cells. The effect of various ...


Sustainable Effects of Distigmine Bromide on Urinary Bladder Contractile Function.

Distigmine bromide (distigmine) is a reversible carbamate cholinesterase (ChE) inhibitor that is used to treat myasthenia gravis. In Japan, it is also used as a remedy for urination disorder (underactive bladder). The most distinctive pharmacological feature of distigmine is its long-lasting action compared to that of other ChE inhibitors. In animals and humans, distigmine was reported to inhibit acetylcholinesterase (AChE) and improve myasthenia gravis for an extended period. Few studies have examined the ...

Efficient Cascade Resonance Energy Transfer in Dynamic Nanoassembly for Intensive and Long-Lasting Multicolor Chemiluminescence.

Light emission induced by chemical reactions, known as chemiluminescence (CL), has been widely used for bioassays, biosensors, imaging and illumination applications. Most known CL systems exhibit flash-type single-color light emissions, which limit their applications. Long-lasting multicolor CL in aqueous solutions is highly desirable, especially for biological applications, but remains a challenge. Herein, we report a simple strategy of achieving highly efficient cascade Förster resonance energy transfer ...

The assembly and antitumor activity of lycium barbarum polysaccharide-platinum-based conjugates.

In this work, the new polysaccharide-platinum conjugates of 5-aminosalicylic acid modified lycium barbarum polysaccharide linking platinum compounds were designed in order to construct an anticancer metal drug delivery system. The multiple analysis methods were used to describe the chemical structure and physical properties of the polysaccharide-metal conjugates. The results showed that 5-aminosalicylic acid successfully acted as linker which was covalently bound between polysaccharide and platinum compound...

Structural Elucidation of Selective Solvatochromism in a Responsive-at-metal Cyclometalated Platinum(II) Complex.

We report the synthesis, characterization, and spectroscopic investigations of a new responsive-at-metal cyclometalated platinum(II) complex. Through mild chemical oxidants and reductants, it was possible to obtain the same complex in three different oxidation states and each of these complexes was structurally characterized by single-crystal X-ray diffraction. We discovered that the platinum(II) complex displays strong solvatochromism in the solid-state, which can be attributed to modulation of Pt‧‧‧...

Enhancing quercetin bioavailability by super paramagnetic starch-based hydrogel grafted with fumaric acid: An in vitro and in vivo study.

Application of Quercetin (Quer) as a natural flavonoid is confined because of limited solubility in water and stability in the body. Herein, we prepared a biodegradable super paramagnetic starch-based hydrogel grafted onto fumaric acid for increasing Quer bioavailability and controlling its release. The molecular structure of starch was modified by using fumaric acid to increase hydrophilicity of hydrogel, and iron oxide nanoparticles is used to strengthen its physical and mechanical properties. The structu...

Predictive Value of Excision Repair Cross-Complementation Group 1 in the Response to Platinum-Based Chemotherapy in Esophageal Cancer: A Meta-Analysis.

Platinum is widely used in the treatment of esophageal cancer. In clinical practice, it is significant to distinguish patients who respond to platinum from those who do not. Excision repair cross-complementation group 1 (ERCC1) is thought to be the key in the resistance to platinum. However, whether it is related to the platinum-based chemotherapy response on real esophageal cancer patients is controversial. We conducted this meta-analysis to explore the association between ERCC1 polymorphisms, its expressi...

A rapid self-healing hydrogel based on PVA and sodium alginate with conductive and cold-resistant properties.

Self-healing hydrogels as renewable materials have attracted significant attention recently. However, traditional self-healing hydrogels require a long time for self-healing and cannot be used at low temperatures. Besides, their poor biocompatibility limits the application of hydrogels. Herein, we have prepared a hydrogel composed of polyvinyl alcohol (PVA) and modified sodium alginate. Due to the dynamic recombination of borate bonds, these hydrogels show a strong self-healing ability, with the shortest se...

New Aspects of Platinum Group Metal-Based Solid-Solution Alloy Nanoparticles: Binary to High-Entropy Alloys.

Platinum group metal (PGM) nanoparticles (NPs) have been investigated in a variety of research fields such as catalysis and electronics. Alloying has been recognized as one of the most efficient ways of improving or creating properties in metals. Among the types of alloys, solid-solution alloy NPs have the advantage of being capable of continuously changing their properties by tuning their composition. However, synthesizing PGM solid-solution alloy NPs with any combination and composition is not an easy tas...

Resolving the ultrafast intersystem crossing in a bimetallic platinum complex.

Bimetallic platinum complexes have interesting luminescent properties and feature long-lasting vibrational coherence and ultrafast intersystem crossing (ISC) after photoexcitation. Ultrafast triplet formation is driven by very strong spin-orbit coupling in these platinum (II) systems, where relativistic theoretical approaches beyond first-order perturbation theory are desirable. Using a fully variational relativistic theoretical method recently developed by the authors, we investigate the origins of ultrafa...

The leading established metal-based drugs: a revisitation of their relevant physico-chemical data.

The study of metal-based drugs represents an important branch of modern bioinorganic chemistry. The growing importance of this field is linked to the large success in medicine of a few metal based drugs, either in clinical use or still experimental. Moreover, these metal-based drugs are frequently used as reference compounds to assess comparatively the behavior of newly synthesized metallodrugs. For the convenience of researchers working in this area we report here a compilation of the relevant analytical a...

Hydrogel-Based Gas Sensors for NO and NH.

In this study, an innovative gas sensing mechanism, self-responsive sensing mechanism, has been detected in the supramolecular hydrogel-based sensors. The self-responsive ability of as-fabricated hydrogel-based sensors to the target gas (e.g., NO, NH, etc.) is determined by three synergetic supramolecular interactions, namely, hydrogen bonding, molecule crystallization, and electrostatic interactions existing in hydroxyls, poly(vinyl alcohol) (PVA) crystallization, and poly(ionic liquids) of the intrinsic h...

Chemiluminescence of 3-aminophthalic acid anion-hydrogen peroxide-cobalt (II).

The 3-aminophthalic acid anion is a light emitter in luminol chemiluminescence. In the present study, the chemiluminescence of the 3-aminophthalic acid anion itself in the presence of hydrogen peroxide-cobalt (II) was studied. The results indicated that 3-aminophthalic acid anion is highly chemiluminescent in the typical hydrogen peroxide-cobalt (II) system. The peak wavelength of this chemiluminescence and the kinetic profile of the 3-aminophthalic acid anion-hydrogen peroxide-cobalt (II) reaction showed s...

Direct Microscopic Proof of the Fermi Level Pinning Gas Sensing Mechanism: The Case of Platinum Loaded WO3.

It is widely known that the sensing characteristics of metal oxides are drastically changed through noble metal oxide surface additives. Using operando infrared spectroscopy it was identified that the Fermi level pinning mechanism dominates the sensor response of platinum loaded WO3. Spectroscopy, however, only provides information about the sample on average. Traditional microscopy offers structural information, but is typically done in vacuum and on unheated sensors, very different than the operation cond...

Multi-stimuli responsive nanogel/hydrogel nanocomposites based on κ-carrageenan for prolonged release of levodopa as model drug.

This study describes the development of a novel biocompatible nanogel/hydrogel nanocomposite system for long-term delivery of bioactive molecules. To this aim, the nanogels were synthesized via radical polymerization of poly(N-isopropylacrylamide). The nanogels were introduced during the formation of a hydrogel network to produce nanogel/hydrogel soft nanocomposites, while the biocompatible hydrogel was based on poly (acrylic acid) grafted onto κ-carrageenan polysaccharide with entrapped magnetic iron oxid...

Dual-enzymatically crosslinked hyaluronic acid hydrogel as a long-time 3D stem cell culture system.

Stem cell based tissue engineering shows enormous potentials in regenerative medicine. Three-dimensional (3D) stem cell culture is the most basic part for tissue engineering. However, a perfect scaffold for high efficient 3D cell culture is still limited currently. Herein, a new hyaluronic acid hydrogel dual-enzymatically crosslinked by horseradish peroxidase (HRP) and choline oxidase (ChOx) is developed as a 3D stem cell culture system. This hydrogel possesses a superior stability over 2 months, controllab...

Development of nanotube coated with platinum nanodendrites using virus as template.

We developed a facile method to fabricate platinum (Pt) porous nanotubes coated with interconnect Pt-dendrites using tobacco mosaic virus (TMV) as template. The surface exposed arginine resides of TMV induced the selective deposition of platinum seeds on TMV outside surface and poly(sodium-p-styrenesulfonate) (PSS) was chosen to stabilize the dispersity of TMV coated with Pt seeds (TMV/PtS). The limited space between the platinum seeds and their uniform distribution on TMV exterior confined the growth of pl...

The Value of Persistent Value.

In this issue of Neuron, Bari et al. (2019) show that neurons in medial frontal cortex, but not a nearby premotor area, encode the relative value of available options with long-lasting persistent activity states during naturalistic foraging. These long-lasting activity states serve to preferentially guide choices to more likely rewarded options.

Temperature-driven Metalloprotein-based Hybrid Hydrogels for Selective and Reversible Removal of Cadmium(II) from Water.

In order to develop biomaterials that easily and reversibly remove trace amounts of metal ions, we synthesized PNIPAM-co-CadRP, a thermally sensitive hybrid hydrogel by immobilizing a reconstituted cadmium binding peptide (CadRP) derived from metalloregulatory protein CadR in a poly(N-isopropylacrylamide) (PNIPAM) gel network. The hybrid hydrogel retains the properties of the immobilized peptide and highly sensitively and selectively binds Cd(II) ions. The thermally sensitive properties of the hybrid hydrog...

Determination of monoamine neurotransmitters and metabolites by high-performance liquid chromatography based on Ag(III) complex chemiluminescence detection.

A novel, simple and efficient chemiluminescence system has been developed for the determination of monoamine neurotransmitters and metabolites. By using the Ag (III)-luminol chemiluminescence system as a detector, a high performance liquid chromatography chemiluminescence method (HPLC-CL) was established and used to detect seven monoamine neurotransmitters. Under the optimized conditions, the detection limits (3S/N) of epinephrine (E), levodopa (l-DOPA), dopamine (DA), serotonin (5-HT), 3-methoxy-4-hydroxyp...

Simultaneous in situ nutrient recovery and sustainable wastewater purification based on metal anion- and cation-targeted selective adsorbents.

The recovery of nitrogen (N) and phosphorus (P) from wastewater is of great importance in addressing the global nutrient crisis. The limitations of existing methods require the development of effective technology. Here, two different hydrogel adsorbents were fabricated with good separation ability for metal cation (M) and metal anion (M) but showed little removal of nutrients. Based on the materials, a novel three-stage operation system combining adsorption and capacitive deionization (CDI) technology was p...

Should platinum-based chemotherapy be preferred for germline BReast CAncer genes (BRCA) 1 and 2-mutated pancreatic ductal adenocarcinoma (PDAC) patients? A systematic review and meta-analysis.

Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal cancers worldwide. Recent studies have shown that 4-20% of patients with PDAC have a germline BReast CAncer (gBRCA) genes 1 and 2 mutation (m). Because homologous recombination is impaired in patients with gBRCAm, some reports suggested that these tumors may be more sensitive to platinum compounds. Therefore, this systematic review and meta-analysis focused on benefit of patients with gBRCAm receiving a platinum-based chemotherapy (PtCh) comp...

Pharmacogenomics for the efficacy of platinum-based chemotherapy: Old drugs, new integrated perspective.

Platinum-based chemotherapy remains the cornerstone of treatment for many malignancies. However, although therapeutic efficiency varies greatly among individuals, there is a lack of pharmacogenomic biomarkers that can be used in clinical settings to identify chemosensitive patients and allow stratification. With the development of high-throughput screening techniques and systems biology approaches, a growing body of evidence has shown that platinum resistance is a multifactorial, multi-dimensional, dynamic ...


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