• There has been substantial interest in the advancement and production of biodegradable polymer to solve the current problem of pollution triggered by the continuous use of synthetic polymer of petroleum origin. (sciepub.com)
  • PVA hydrogels with 60% water to dimethyl sulfoxide (DMSO) ratio without ferritin particle (H60) and PVA hydrogels with 80% water to DMSO ratio with ferritin particle (F80) provided a good alternative to natural jellyfish mesoglea exhibiting shear modulus of 33.06 Pa and 39.99 Pa respectively as compared to 4.75 Pa for Aurelia aurita mesoglea. (psu.edu)
  • Nanocomposite hydrogel consisting of PVA matrix and ferritin nanoparticles were found to exhibit higher durability over regular PVA hydrogels and had more consistent properties due to increased cross-linking at ferritin nanoparticle sites. (psu.edu)
  • Injectable polymer-nanoparticle (PNP) hydrogels are leveraged as a depot technology for the sustained delivery of a nanoparticle antigen (RND-NP) displaying multiple copies of the SARS-CoV-2 receptor-binding domain (RBD) and potent adjuvants including CpG and 3M-052. (uw.edu)
  • Hydrogels generally consist of synthetic and naturally hydrated polymers, and exhibit physical and biological properties [ 4 ]. (opendentistryjournal.com)
  • Polylysine is a homopolypeptide belonging to the group of cationic polymers: at pH 7, polylysine contains a positively charged hydrophilic amino group. (wikipedia.org)
  • Boston Cosmetics LLC disclosed pigment-functionalized, cationic polymer compositions for hair coloring. (cosmeticsandtoiletries.com)
  • However, the first man-made plastic material Parkesine was not known to the public before 1864's Great London Exposition, an international science fair where English metallurgist Alexander Parkes exhibited Parkesine for the first time (yes, he named it after himself). (zmescience.com)
  • In 1862, Alexander Parkes introduced the world to Parkesine, the very first artificial plastic. (wotr.org)
  • Cellulose acetate is prepared by acetylating cellulose, the most abundant natural polymer. (springer.com)
  • As researchers continue to make countless advances in the field of electronics, researchers recently published their findings on a new electronic device that not only imitates the retina but is also non-toxic and potentially biocompatible, making it a possible solution for future artificial eyes and prosthetics. (electropages.com)
  • Recognising the challenges faced with artificial retinas and the dependency on technologies that are not biocompatible, a team of researchers hailing from Germany and Italy have recently published a paper where they describe an electronic device that mimics a retina utilising non-toxic compounds. (electropages.com)
  • The proteins are synthesized using recombinant, genetic engineering techniques, allowing for the creation of biocompatible polymers with nanoscale precision that impart highly specific protein functionalities. (frontiersin.org)
  • Plastic is a versatile material encompassing a wide range of synthetic and naturally existing polymer substances. (wotr.org)
  • Similar rheological studies of artificial tear preparations should facilitate design of more efficacious tear substitutes. (lww.com)
  • Artificial substitutes for body parts, and materials inserted into tissue for functional, cosmetic, or therapeutic purposes. (lookformedical.com)
  • The unceasingly growing public concern has incited research interest in biodegradable polymers as substitutes to the conventional non-degradable polymers like polyethene etc. [ 3 ] For efficient management of used-plastic materials, recycling is one solution. (sciepub.com)
  • The terms plastic, polymer, resin, compound and high-polymer macromolecular substance are used often used interchangeably. (firehouse.com)
  • A resin can occur both naturally as well as synthetic - made in the labs, while many of the artificial can come close to their natural counterparts - a lot of them have very different properties. (crestresins.com)
  • The ferritin nanoparticles were found to act as springs, increasing the modulus by increasing the surface area of the cross-linked polymer chains and disrupting long linear chain patterns of the polymer. (psu.edu)
  • Methylcellulose (food additive E461) is a water-soluble polymer chemically modified from natural cellulose. (foodingredientsfirst.com)
  • Cellulose acetate polymer is used to make a variety of consumer products including textiles, plastic films, and cigarette filters. (springer.com)
  • Initially the assessments of the biodegradability of CA reached the incorrect conclusion that the polymer is not biodegradable, due to evaluations being performed only with cellulose degrading organisms like fungi [ 3 ]. (springer.com)
  • Water on hydrophobic surfaces will exhibit a high contact angle . (wikipedia.org)
  • In this work, we present a novel approach to fabricate such coatings, which specifically involves the use of surface-adsorbed, nanoscale-designed protein polymers to prepare reproducible, customized surfaces. (frontiersin.org)
  • These polymer-based artificial surfaces can support the growth of specific bacterial assemblages, pathogens being of particular concern. (bvsalud.org)
  • Within the last decade, however, a number of research groups have found that certain biopolymer gels-water-filled networks of naturally occurring filamentary substances-contract when subject to such shear forces. (aps.org)
  • Resins are generally considered a family of substances that are viscous and convert into rigid polymers through a curing process. (crestresins.com)
  • To make matters worse, electronics that are flexible, something which would be needed for an artificial retina, are generally based on organic compounds, which themselves can be highly reactive to biological matter (and therefore trigger an immune response). (electropages.com)
  • Moreover, peptides can exhibit extremely high biological specificity and their breakdown products are generally not only benign, but indeed useful as food (18). (pharmtech.com)
  • Artificial bone grafting. (dokumen.pub)
  • The biomimetic, antimicrobial material is applied to the titanium surface of the implant, which then connects with the bone and naturally adheres to the bone. (fraunhofer.de)
  • Some of these materials have distinctive properties that make them superior to synthetic polymers, particularly in medicine, where biocompatibility and biodegradability are strong assets. (sciepub.com)
  • 2 The artificial dermis wrinkle model is made with contraction collagen gel-containing fibroblasts and can be used for the validation of antiwrinkle ingredients. (cosmeticsandtoiletries.com)
  • In fact, some synthetic polymers contain the same elements as natural polymers, exhibit the same burning characteristics, and produce the same products of combustion - many of which can be toxic. (firehouse.com)
  • Look around the room you are in - how many things are made of natural polymers and how many are synthetic? (firehouse.com)
  • This study aimed to review the requirements and difficulties of natural and artificial regeneration of cork oak ( Quercus suber L.) in the Mediterranean Basin. (sisef.it)
  • Both natural and artificial regeneration of cork oak frequently encounter numerous difficulties which limit the ecological conditions for cork oak regeneration, including acorn predation, slow growth, vegetative competition, browsing of seedlings, fires, pests and diseases, and summer drought. (sisef.it)
  • Our goal is to summarize the different problems that affect the natural and artificial regeneration of cork oak, while proposing possible solutions that may help foresters and land-owners to reduce these problems. (sisef.it)
  • An artificial replacement for one or more natural teeth or part of a tooth, or associated structures, ranging from a portion of a tooth to a complete denture. (lookformedical.com)
  • The toxic element arsenic occurs naturally in the Earth's crust and is enriched in precious metal deposits. (stanford.edu)
  • Solvent-based adhesives are a mixture of ingredients (typically polymers) dissolved in a solvent. (dgfloors.com)
  • The adoption of artificial and synthetic ingredients is reduced due to the clean labeling in cosmetics over the last few years. (technavio.com)
  • Hence, the rising prominence of clean labeling in cosmetics and cosmetic ingredients is expected to further encourage R&D activity among vendors for the development of eco-friendly alternatives to artificial and synthetic ingredients during the forecast period. (technavio.com)
  • Some modern technologies combined conventional methods with artificial intelligence to enhance Reproducibility and Productivity (RP), which is the pressing need of the present fast fashion trend. (indiantextilejournal.com)
  • This paper is a comparative study that confers the likelihood of the conventional petro-plastics being substituted by the new-age degradable and renewable bio-derived polymers. (sciepub.com)
  • While the poly-L-lysine (PLL) precursor amino acid occurs naturally, the poly-D-lysine (PDL) precursor is an artificial product. (wikipedia.org)
  • Over the past decades, the development in the process and manufacture of ceramic materials exhibit special properties such as extreme heat resistance, superconductivity, hardness, biocompatibility, etc. (thebehindscience.com)
  • Furthermore, these materials exhibit tensile strength,surface roughness, and wettability values appropriate for their finaluse as cardiac patches. (ibecbarcelona.eu)
  • Polylysine exhibits high positive charge density which allows it to form soluble complexes with negatively charged macromolecules. (wikipedia.org)
  • These assemblies exhibit high surface areas on the order of hundreds of m 2 /g 4 and are therefore useful for applications that rely on interfacial interactions 5 . (nature.com)
  • Some high performance permanent PSAs exhibit high adhesion values and can support kilograms of weight per square centimeter of contact area, even at elevated temperatures. (dgfloors.com)
  • They exhibit great versatility when combined with other resins, as they have high film elasticity and substrates adhesion. (crestresins.com)
  • Films made from copper nanowires are promising candidates, exhibiting high conductivity and optical transparency in addition to being flexible. (nanowerk.com)
  • But despite the eye being a relatively simple organ, trying to create an artificial eye is an extremely difficult challenge , something that researchers have barely been able to achieve. (electropages.com)
  • Researchers now offer a simple explanation for this behavior, showing that it arises from the flow of water through the material's microscopic polymer network. (aps.org)
  • The researchers examined a synthetic polymer gel with a much smaller pore size, about 10 nanometers. (aps.org)
  • Researchers at the Fraunhofer Institute for Applied Polymer Research IAP have been working alongside the Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB and the Fraunhofer USA Center for Manufacturing Innovation CMI to develop a tissue adhesive that can help avoid early replacement of prostheses in the future. (fraunhofer.de)
  • The word polymer comes from the Greek 'poly' (many) and 'mer' (part). (firehouse.com)
  • In reality, a polymer is a long-chained molecule composed of many smaller parts called monomers ('mono' is Greek for one). (firehouse.com)
  • In 1847, French chemist Jean-Baptiste Dumas established all the acids to be the same compound, which he called E280 (Propionic acid), from the Greek words πρῶτος (prōtos), meaning first, and πίων (piōn), meaning fat, because it is the smallest H(CH2)nCOOH acid that exhibits the properties of the other fatty acids, such as producing an oily layer when salted out of water and having a soapy potassium salt. (atamanchemicals.com)
  • This phenomenon is based on the interaction between the positively charged polymer and negatively charged cells or proteins. (wikipedia.org)
  • Native membrane derived polymer-supported lipid bilayers (nSLBs) are poised to bridge the gap between live cell experiments and traditional model membrane architectures that by offering a combination of accessibility by surface sensitive analytical instrumentation and a composition which more closely resembles cellular membranes by displaying a diversity of endogenous membrane proteins, lipids, and carbohydrates. (lu.se)
  • Unlike the previous tear film replacements, which were mainly viscous in nature, viscoelastic solutions, particularly those based on hyaluronan, exhibited very interesting, potentially beneficial, rheological properties, especially when slightly altered to become elastoviscous. (lww.com)
  • Healon, the first ophthalmic viscosurgical device, was approved in 1980, but studied extensively before then, exhibits very interesting shear-thinning properties that were found to be beneficial in both ophthalmic surgery and somewhat later as a tear replacement solution. (lww.com)
  • This review examines the rheological properties that are significant in artificial tear solutions. (lww.com)
  • 1,2 Shortly after their introduction, publications appeared, showing that their rheological properties were beneficial in artificial tear solutions and in surgery. (lww.com)
  • Synthetic polymers, however, are produced to conform to specific properties, and it may be difficult to distinguish between them. (firehouse.com)
  • 6,7 The classification of these OVDs, based on their rheological behavior, has demonstrated that behavior of 2 OVDs may be different despite similar generic constituent concentrations because the molecular structural nature of the rheologically active polymer, usually hyaluronic acid (hyaluronan [HA]), in different manufacturer's solutions may be very different, usually with respect to its molecular mass average and polydispersion of the molecular weight (MW). (lww.com)
  • also known as propanoic acid) is a naturally occurring carboxylic acid with chemical formula CH3CH2CO2H. (atamanchemicals.com)
  • E280 (Propionic acid) is also useful as an intermediate in the production of other chemicals, especially polymers. (atamanchemicals.com)
  • This is a significantly better match compared to the 1041.67 Pa shear modulus of Ecoflex, a soft polymer material commonly used in biomimetic robotics. (psu.edu)
  • This material was found to exhibit close resemblance to Aurelia aurita (jellyfish) mesoglea in terms of stiffness modulus and water content. (psu.edu)
  • A particularly difficult photosynthetic step to replicate is the oxidation of water and concomitant production of oxygen, which, in artificial systems, require the use of catalysts that are both reactive and stable. (stanford.edu)
  • Several charges are needed on a polymer for it to overcome the dissipative tendency of thermal energy and bind to a surface. (pharmtech.com)
  • This increase is as a result of the release of small counterions to solution as side-chain charges in the newly adsorbed polymers form ion pairs with side chains of opposite polarity on the surface of the nanofilm. (pharmtech.com)
  • Our findings reveal that diatoms grown in acidified seawater exhibit higher surface potential and higher plasma membrane depolarization. (bvsalud.org)
  • Daniel Haber , director of the Massachusetts General Cancer Center, remembers the group talking about CRISPR gene editing, artificial intelligence to improve diagnosis and treatment plans, and immunotherapy techniques that incite the immune system to fight tumors. (protomag.com)
  • Polymers can be subdivided into two groups - naturally occurring and man-made. (firehouse.com)
  • Man-made and naturally occurring polymers behave much the same way during reactions, especially when exposed to fire. (firehouse.com)
  • Naturally derived materials like gum, rubber, and shellac are believed to be the inspiration behind the invention of man-made synthetic plastics such as PVC or bakelite. (zmescience.com)
  • These resins are aromatic hydrocarbon polymers made from the monomer styrene. (crestresins.com)
  • In compressive testing Aurelia aurita mesoglea was found to exhibit nonlinear modulus in the range of -10 kPa to 70 kPa depending upon the compressive strain (0-50% strain). (psu.edu)
  • Celluloid turned out to be a huge commercial success and Hyatt founded his own company, manufacturing piano keys, billiard balls, toys, artificial gemstones, combs, and a wide range of products in bulk using celluloid. (zmescience.com)
  • Shiseido Co. has patented an artificial dermis wrinkle model, its manufacture and an antiwrinkle ingredient evaluation method. (cosmeticsandtoiletries.com)
  • Adhesives may be found naturally or produced synthetically. (dgfloors.com)
  • We define herein the necessary parameters that need to be further studied to design and formulate rheologically better artificial tears, which should provide enhanced efficacy compared with their predecessors. (lww.com)
  • Polymer solution parameters. (dokumen.pub)
  • The single bonds attach to each other creating the self-reaction, which in turn creates the long chained polymer. (firehouse.com)
  • Control over structure and origin has long been a selling point of synthetic polymer-based materials for use in vivo . (pharmtech.com)
  • Journal of Polymer and Biopolymer Physics Chemistry , 2014 2 (4), pp 84-90. (sciepub.com)
  • Journal of Polymer and Biopolymer Physics Chemistry 2.4 (2014): 84-90. (sciepub.com)
  • For example, in April 2019, BASF SE launched Euperlan OP White an eco-friendly, biodegradable, wax-based alternative to synthetic polymer opacifiers. (technavio.com)
  • We recently developed a generic method for producing polymer-supported lipid bilayers directly from cell-derived native membrane vesicles (NMVs). (lu.se)
  • Artificial device such as an externally-worn camera attached to a stimulator on the RETINA, OPTIC NERVE, or VISUAL CORTEX, intended to restore or amplify vision. (lookformedical.com)