Results 71 to 80 of about 52,128 (263)
The Protective Action of Polyvinyl Alcohol(PVA)in PVA Photographic Emulsion
The Journal of the Society of Chemical Industry, Japan, 1963 種々の条件における臭化銀に対するポリビニルアルコール(PVA) の保護作用は比較的希薄なPVA溶液中で多量の臭化銀を生成させ,臭化銀がエマルジョンとして溶液中に残存した量を測定することにより比較を行なった。硝酸銀および臭化カリウムを過剰にした場合,乳剤は僅かに銀イオンの過剰のとき最も安定し,これよりも銀イオン濃度が増せば急激に凝集が起こり,これに対し臭素イオン過剰の場合は徐々に凝集が起こり,臭素イオン濃度が増せば保護作用は低下する。また部分ケン化PVAは完全ケン化PVAよりも保護作用が大きい。PVAでは残存する僅かの酢酸基の量が保護作用に大きな役割を果す。重合度については高いものほど保護作用は大きい。温度の影響は生成した臭化銀自体の性質に大きく及ぼし,PVAの保護効果は明確に現われない。
Masaaki Sugiura, Etsuo Fujii
openaire +2 more sources
Bacteria‐Responsive Nanostructured Drug Delivery Systems for Targeted Antimicrobial Therapy
Advanced Materials, EarlyView.Bacteria‐responsive nanocarriers are designed to release antimicrobials only in the presence of infection‐specific cues. This selective activation ensures drug release precisely at the site of infection, avoiding premature or indiscriminate release, and enhancing efficacy.
Guillermo Landa +3 more
wiley +1 more source
Positively Charged Polymer‐Brush MOFs for Large‐Area, Pressure‐Resistant Gas Separation Membranes
Advanced Materials, EarlyView.A universal POPA strategy enables positively charged polymer‐brush MOFs with self‐adaptive interfacial interlocking to resist aggregation under fast processing. This design ensures seamless dispersion within large‐area selective layers, achieving 1 m‐wide roll‐to‐roll fabrication of pressure‐resistant MMCMs with tunable CO2 separation performance ...
Yi Yang +11 more
wiley +1 more source
Advanced Materials, EarlyView.A transparent, deformable stevia–PVA hydrogel triboelectric nanogenerator delivers significantly enhanced mechanical strength and electrical output through biomimetic hydrogen‐bonded networks. Coupled with machine learning–assisted signal recognition, the self‐powered hydrogel enables accurate human‐motion sensing for intelligent wearable and IoT ...
Thien Trung Luu +5 more
wiley +1 more source
Temperature-dependent behavior of PVA/Drug composites during melt extrusion
Production Engineering ArchivesThis study highlights the growing collaboration between materials, engineering, and pharmaceutical research, enhancing drug efficacy and reducing side effects by optimizing polymer carriers for stability and compatibility. Polyvinyl alcohol (PVA), Rhumix,
Bakly Ali AK. +3 more
doaj +1 more source
Sonochemical synthesis and characterization of Ag2S/PVA and CuS/PVA nanocomposite
Ultrasonics Sonochemistry, 2002 Abstract Nanospherical Ag 2 S/PVA and nanoneedles of CuS/PVA composite have been prepared by sonochemical irradiation of a 10% ethylenediamine–water solution of elemental sulfur, silver nitrate, or copper acetate in the presence of polyvinyl alcohol. The particle sizes are 25 and 225 nm for Ag 2 S/PVA and CuS/PVA nanocomposites, respectively.
R.Vijaya Kumar +4 more
openaire +1 more source
Ratiometric Mycotoxin Detection in Living Plants With Dual‐Emissive Nanosensors
Advanced Materials, EarlyView.A minimally invasive microneedle patch integrates carbon dot‐embedded metal–organic frameworks as nanosensors to detect a key fungal toxin in living plants. The nanosensor produces a ratiometric fluorescence signal that enables early, non‐destructive diagnosis of fungal infection before visible symptoms, offering a new biomaterials‐based strategy for ...
Yuliang Li +9 more
wiley +1 more source
Release of PVA from PVA/PA Compounds into Water Solutions
, 2014 This work is focused on the preparation of polymeric blend composed of polyamide (PA) and polyvinyl alcohol (PVA) with the intention to explore its basic characteristics important for potential use in medicine, especially for drug delivery systems.
J. Klofac, P. Bazant, I. Kuritka
openaire +13 more sources
Advanced Materials, EarlyView.The intimate interaction between negatively charged RNA molecules and conjugated polymers in organic electrochemical transistors (OECTs) in aqueous electrolytes is investigated. It demonstrates that RNA binding reduces the volumetric capacitance of the polymer channel, enabling the development of an ultrasensitive biosensing platform capable of ...
Hong Liu +7 more
wiley +1 more source
Nocturnal Intraocular Pressure Monitoring With a Soft Contact Lens Sensor for Glaucoma Management
Advanced Materials, EarlyView.A soft contact lens sensor enables continuous, noninvasive monitoring of nocturnal intraocular pressure (IOP) under closed‐eye sleep conditions. By integrating a highly compliant inductive–capacitive circuit onto a commercial lens, the device achieves record sensitivity and stable performance.
Yumin Dai +19 more
wiley +1 more source