Results 31 to 40 of about 98,252 (223)

A Complementary and Revised View on the N-Acylation of Chitosan with Hexanoyl Chloride

Marine Drugs, 2021
The modification of the biobased polymer chitosan is a broad and widely studied field. Herein, an insight into the hydrophobization of low-molecular-weight chitosan by substitution of amino functionalities with hexanoyl chloride is reported. Thereby, the
Berthold Reis, Niklas Gerlach, Christine Steinbach, Karina Haro Carrasco, Marina Oelmann, Simona Schwarz, Martin Müller, Dana Schwarz   +7 more
doaj   +1 more source

Gibbs energy minimization thermodynamics for CO2 capture by aqueous amines: Conservation laws, concentration variables, and parameter consistency

The Canadian Journal of Chemical Engineering, EarlyView.
We clarify how Gibbs‐energy‐minimization models for aqueous‐amine CO2 capture fail when conservation constraints and concentration conventions are inconsistent. Exact standard‐state conversions and Reaktoro case studies show that P(CO2)‐loading fits can mask non‐unique parameters and wrong speciation, motivating complete water‐inclusive formulations ...
William R. Smith, William Rutherford, Allan M. M. Leal   +2 more
wiley   +1 more source

Points of Zero Charge and Potentiometric Titrations

Adsorption Science & Technology, 2003
Based on the various categories of surface charge and the definitions of points of zero charge proposed by Sposito (1984, 1998), the determination of the adsorbed proton charge (σ H ) and the point of zero net charge (PZNPC) of insoluble oxides and layer
Tao Zuyi, Chu Taiwei
doaj   +1 more source

Biosensors for Food Safety and Adulteration Monitoring: Applications, Smart Packaging Integration, and Pathways to Intelligent, Field‐Deployable Detection Systems

Food Safety and Health, EarlyView.
Biosensors enable rapid, sensitive, and portable detection of pathogens, contaminants, allergens, and food adulteration. Integration with smart packaging, smartphones, IoT, and machine learning supports real‐time monitoring and intelligent decision‐making, whereas microfluidics, biodegradable materials, explainable AI, and blockchain offer pathways ...
Mohima Akther Any, Abid Hassan Arnab, Liza Akter, Yusuf Chowdhury, Md. Hassan Bin Nabi, Md Abu Rayhan, Nazmul Islam, Wahidu Zzaman   +7 more
wiley   +1 more source

ANALYSIS AND DISSOCIATION OF CERTAIN ACIDIC PHARMACEUTICAL COMPOUNDS IN N-BUTANOL [PDF]

Bulletin of Pharmaceutical Sciences. Assiut University, 1978
Visual and potentiometric titrations of aspirin, benzoic acid, hydrochloric acid, nicotinic acid, perchloric acid, phenyl butazone, salicylic acid, chloropromazine hydrochloride, ephedrine hydrochloride, mepyramine maleate and procaine hydrochloride were
Kamla Emara, Mahmoud El-Gendy, Nawal El-Rabbat   +2 more
doaj   +1 more source

Potentiometric Titration Based on the Reference Electrode Equipped with Ionic Liquid Salt Bridge — 1. Precipitation Titration of Chloride with Silver Ions in Water

Electrochemistry, 2023
A reference electrode equipped with ionic liquid salt bridge consisting of tributyl(2-methoxyethyl)phosphonium bis(pentafluoroethanesulfonyl)amide has been employed for potentiometric precipitation titration of chloride with silver ions in water at 25 °C.
Takashi KAKIUCHI, Ryunosuke TANIGO, Atsushi TANI, Takeshi YAMAZAKI, Kohta KOMATSUBARA, Keiji NAKANO, Masahiro YAMAMOTO   +6 more
doaj   +1 more source

Parental Exposure to Nanoplastics and Graphene Oxide Induces Transgenerational Toxicity in Caenorhabditis elegans

Journal of Applied Toxicology, EarlyView.
ABSTRACT Environmental pollution by emerging contaminants such as nanoplastics (NPs) and graphene oxide (GO) represents a growing threat to global health and ecosystems. This study investigated the effects of parental exposure, both isolated and combined, to 100 μg/L NPs (polystyrene, spherical, 100 nm) and 100 mg/L GO, using Caenorhabditis elegans as ...
Gabriela Corrêa Soares, Larissa Müller, Suamy Machado Cruz, Andy Taipe Huisa, Danilo Roberto Carvalho Ferreira, Clascídia Aparecida Furtado, Juliane Ventura‐Lima   +6 more
wiley   +1 more source

Self‐powered H2O2 production using a Zn–air electrochemical cell employing a polymer blend membrane

Journal of Chemical Technology &Biotechnology, EarlyView.
Abstract BACKGROUND Hydrogen peroxide (H2O2) is a strong oxidant and a carbon‐free fuel which is synthesized by the costly anthraquinone method, prompting research into highly efficient electrocatalytic processes. RESULTS This study introduces a self‐sustaining Zn–air electrochemical cell with a carbon black cathode and an efficient polymer‐blend ion ...
Ioanna Kournopoulou, Vasiliki Florou, Maria Katsaiti, Konstantinos C Andrikopoulos, Loukas Belles, Valadoula Deimede, Anastasios Keramidas, Yannis Deliyiannakis, Joannis K Kallitsis, Dionissios Mantzavinos, Panagiotis Lianos   +10 more
wiley   +1 more source

Especiação da alcalinidade da água do mar [PDF]

, 2005
TCC (graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Físicas e Matemáticas. Curso de Química.Neste trabalho é proposto um método potenciométrico para a determinação da alcalinidade das águas naturais e sua especiação.
GOMES, Ana Paula Nogareti
core  

Application of Automatic Potentiometric Titrator in Continuous Titration of Six Indices in Groundwater

Yankuang ceshi, 2018
BACKGROUND The analysis of six indices (pH, total alkalinity, chloride ion, calcium ion, magnesium ion and sulfate radical) in underground water needed to be sampled separately for each index. The steps were tedious with low efficiency.
ZHAO Wen-jie, MA Ming, ZHANG Ke, LI Yan-xiang, HOU Ming-lan, ZHANG Yu-qiang   +5 more
doaj   +1 more source