Thermal and hydration effects on the mobility of compact and branched organic molecules and a bulky pharmaceutical substance loaded in submonolayer amounts onto mesoporous silica have been elucidated using H and P solid-state NMR. In all cases, the ambient hydration has a stronger effect than an increase in temperature to 370 K for water-free silica. The effect of hydration depends on the guest and ranges from complete solvation to a silica-water-guest sandwich structure to a silica-guest/silica-water pattern. The mobility of the guests under different conditions has been described. The specific structure of the MCM-41 surface allows one to study very slow surface diffusion, a diffusivity of about 1010 m/s. The data reported are relevant to any nonfunctionalized silica, while the method used is applicable to any phosphor-containing guest on any host.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.langmuir.0c02327 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Genetic parameters and genotype-by-environment interaction estimates for growth and feed efficiency related traits in Chinook salmon, Oncorhynchus tshawytscha, reared under low and moderate flow regimes.
Genet Sel Evol
September 2024
Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, 7001, Australia.
Article Synopsis
- A genotype-by-environment (G×E) interaction occurs when different genotypes respond uniquely to varying environmental conditions, with this study focusing on Chinook salmon under different water flow regimes.
- The research aimed to evaluate whether manipulating water flow in salmon production impacts genetic performance, especially since water flow is an overlooked variable affecting metabolism.
- Results indicated minimal G×E interactions between low and moderate flow regimes, suggesting that feeding behavior should be prioritized to enhance feed efficiency in salmon farming rather than adjusting for flow differences.
Spatiotemporal variation in microplastics derived from polymer-coated fertilizer in an agricultural small river in Ishikawa Prefecture, Japan.
Environ Pollut
May 2023
School of Creative Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo, 169-8555, Japan.
Marine plastic pollution has highlighted the need to address the disposal of plastic materials used in agricultural fields and prevent their runoff. To assess the status of microplastics derived from polymer-coated fertilizers (microcapsules), we investigated their seasonal and daily variations in a small agricultural river in Ishikawa Prefecture, Japan, throughout the irrigation period of April to October 2021 and 2022. We also investigated the relationship between microcapsule concentration and water quality.
View Article and Find Full Text PDFFor Whom a Puddle Is the Sea? Adsorption of Organic Guests on Hydrated MCM-41 Silica.
Langmuir
September 2020
Institute of Organic Chemistry, University of Regensburg, Universitaetstrasse 31, 93053 Regensburg, Germany.
Thermal and hydration effects on the mobility of compact and branched organic molecules and a bulky pharmaceutical substance loaded in submonolayer amounts onto mesoporous silica have been elucidated using H and P solid-state NMR. In all cases, the ambient hydration has a stronger effect than an increase in temperature to 370 K for water-free silica. The effect of hydration depends on the guest and ranges from complete solvation to a silica-water-guest sandwich structure to a silica-guest/silica-water pattern.
View Article and Find Full Text PDFUltra-Efficient Superconducting Dayem Bridge Field-Effect Transistor.
Nano Lett
July 2018
NEST , Instituto Nanoscienze-CNR and Scuola Normale Superiore , I-56127 Pisa , Italy.
Superconducting field-effect transitor (SuFET) and Josephson field-effect transistor (JoFET) technologies take advantage of electric-field-induced control of charge-carrier concentration to modulate the channel superconducting properties. Despite the fact that the field-effect is believed to be ineffective for superconducting metals, recent experiments showed electric-field-dependent modulation of the critical current ( I) in a fully metallic transistor. However, the grounding mechanism of this phenomenon is not completely understood.
View Article and Find Full Text PDFAltered environment and risk of malaria outbreak in South Andaman, Andaman & Nicobar Islands, India affected by tsunami disaster.
Malar J
July 2005
Vector Control Research Centre, Indira Nagar, Pondicherry, India.
Background: Pools of salt water and puddles created by giant waves from the sea due to the tsunami that occurred on 26th December 2004 would facilitate increased breeding of brackish water malaria vector, Anopheles sundaicus. Land uplifts in North Andaman and subsidence in South Andaman have been reported and subsidence may lead to environmental disturbances and vector proliferation. This warrants a situation analysis and vector surveillance in the tsunami hit areas endemic for malaria transmitted by brackish water mosquito, An.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!