The influence of temperature and relative humidity on the stability of cefetamet pivoxil (CFP) and its hydrochloride (CFP.HCl) in solid phase was investigated. The process of degradation was studied using HPLC with UV detection. The degradation of CFP and CFP.HCl occurring at air humidity RH>50% is an autocatalytic first-order reaction with respect to substrate concentration, while at 0% relative humidity of the ambient air it is a first-order reaction relative to substrate concentration for CFP.HCl, and a reversible first-order reaction for CFP. The rate constants (k) were determined in dry air at 373 K, 378 K, 383 K, 388 K and 393 K; at air humidity RH = 76.4% at 333 K, .343 K, 353 K, 363 K and 373 K; and at 363 K at air humidity RH>50%. The kinetic and thermodynamic parameters of the degradation were calculated.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Interventions used to reduce infectious aerosol concentrations in hospitals-a review.
EClinicalMedicine
January 2025
WEISS Centre, University College London, UK.
Background: The COVID-19 pandemic highlighted the need for improved infectious aerosol concentrations through interventions that reduce the transmission of airborne infections. The aims of this review were to map the existing literature on interventions used to improve infectious aerosol concentrations in hospitals and understand challenges in their implementation.
Methods: We reviewed peer-reviewed articles identified on three databases, MEDLINE, Web of Science, and the Cochrane Library from inception to July 2024.
Mechanism, Performance, and Application of g-CN-Coupled TiO as an S-Scheme Heterojunction Photocatalyst for the Abatement of Gaseous Benzene.
ACS Appl Mater Interfaces
January 2025
Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-Gu, Seoul 04763, Republic of Korea.
In this research, S-scheme heterojunction photocatalysts are prepared through the hybridization of nitrogen-rich g-CN with TiO (coded as TCN-(): as the weight ratio of TiO:g-CN). The photocatalytic potential of TCN-() is evaluated against benzene (1-5 ppm) across varying humidity levels using a dynamic flow packed-bed photocatalytic reactor. Among the prepared composites, TCN-(10) exhibits the highest synergy between g-CN and TiO at "" ratio of 10%, showing superior best benzene degradation performance (e.
View Article and Find Full Text PDFDiversity of Aspergillus section Nigri species from vineyards with different agro-climatic conditions in Catalonia, Spain.
Int J Food Microbiol
December 2024
Veterinary Mycology Group, Department of Animal Health and Anatomy, Universitat Autònoma de Barcelona, Bellaterra, Spain.
A few Aspergillus section Nigri species are involved in the ochratoxin A (OTA) contamination in grapes worldwide, and its occurrence is determined by the agro-climatic conditions of each region. The aim of this study was to examine the diversity of black aspergilli isolated from grapes, soil, and air from vineyards with different agro-climatic conditions. A total of four vineyards located in Catalonia were studied.
View Article and Find Full Text PDFThe effect of short-term exposure to air pollution on the admission of ischemic stroke and its interaction with meteorological factors.
Public Health
January 2025
Department of Neurology, First Affiliated Hospital of Gannan Medical Univesity, Ganzhou, 341000, Jiangxi, China. Electronic address:
Objectives: The aim of this study was to investigate the associations, potential effects, and interactions between short-term exposure to air pollution and the risk of ischemic stroke (IS).
Study Design: An ecological study.
Methods: Daily data on IS incidents, air pollution, and meteorological conditions were collected from 2017 to 2021 in Gannan.
Monitoring of indoor air quality at a large sailing cruise ship to assess ventilation performance and disease transmission risk.
Sci Total Environ
January 2025
Centre for Safety, Resilience and Protective Security, Fire Safety Engineering Group, School of Computing and Mathematical Sciences, Faculty of Engineering and Science, University of Greenwich, Greenwich SE10 9LS, United Kingdom.
Large passenger ships are characterised as enclosed and crowded indoor spaces with frequent interactions between travellers, providing conditions that facilitate disease transmission. This study aims to provide an indoor ship CO dataset for inferring thermal comfort, ventilation and infectious disease transmission risk evaluation. Indoor air quality (IAQ) monitoring was conducted in nine environments (three cabins, buffet, gym, bar, restaurant, pub and theatre), on board a cruise ship voyaging across the UK and EU, with the study conducted in the framework of the EU HEALTHY SAILING project.
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!