The kinetics of gluconic acid biosynthesis of the strain Aspergillus niger 13-73 by submerged cultivation in a medium containing 26% glucose was investigated. The maximum amount of the product was obtained at minimum biomass growth. The yield of the product compared to the theoretical one was 95% and the fermentation period was 42 hours. The results regarding the limitation theory are discussed.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Revealing OH species in situ generated on low-valence Cu sites for selective carbonyl oxidation.
Proc Natl Acad Sci U S A
October 2024
Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong 999077, China.
Catalytic oxidation through the transfer of lattice oxygen from metal oxides to reactants, namely the Mars-van Krevelen mechanism, has been widely reported. In this study, we evidence the overlooked oxidation route that features the in situ formation of surface OH species on Cu catalysts and its selective addition to the reactant carbonyl group. We observed that glucose oxidation to gluconic acid in air (21% O) was favored on low-valence Cu sites according to X-ray spectroscopic analyses.
View Article and Find Full Text PDFFly ash treatment via conventional and microwave-assisted organic acid leaching: kinetics and life cycle assessment.
Environ Sci Pollut Res Int
April 2024
Department of Mining and Metallurgical Engineering, Mackay School of Earth Sciences and Engineering, University of Nevada, Reno, USA.
Heedless disposal of oil-based fly ash contributes to the contamination of the air, water, and soil. Acid leaching of industrial solid wastes is recognized as a versatile, cost-effective, and environmentally friendly solid waste treatment approach. The present study investigated the viability of conventional leaching (CL) and microwave-assisted leaching (MAL) of predominant heavy metals from Mazut-burnt fly ash.
View Article and Find Full Text PDFIs there a fast track ("Darmstrasse") for fluids in the small intestine? Evidence from magnetic resonance imaging.
Eur J Pharm Biopharm
May 2024
University of Greifswald, Institute of Pharmacy, Department of Biopharmaceutics and Pharmaceutical Technology, Felix-Hausdorff-Straße 3, 17491 Greifswald, Germany. Electronic address:
Article Synopsis
- The study investigates how fluids move through the small intestine, focusing on drug absorption and dissolution under different conditions (fasting vs. after a meal).
- It uses MRI technology to track ingested water marked with manganese gluconate, examining transit times and distribution in 9 human subjects.
- Results indicate that water moves rapidly through the small intestine in both fasting and fed states, with some instances showing quicker transit in the postprandial state, providing insights into how food impacts drug absorption.
Bioelectrochemical cascade reaction for energy-saving hydrogen production and innovative Zn-air batteries.
Bioelectrochemistry
June 2024
Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials, School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China. Electronic address:
The oxygen evolution reaction (OER) is an important half-reaction in electrochemical hydrogen production (EHP) and rechargeable metal-air batteries. However, the sluggish OER kinetics has seriously impeded their performance. Herein, we report a bioelectrochemical cascade system composed of glucose oxidase (GOx)-functionalized N-doped porous carbon nanofibers to replace OER in EHP and rechargeable Zn-air batteries (ZABs) applications.
View Article and Find Full Text PDFRecovery of valuable metals from spent lithium-ion batteries using microbial agents for bioleaching: a review.
Front Microbiol
May 2023
Department of Civil and Environmental Engineering, National University of Singapore, Singapore, Singapore.
Spent lithium-ion batteries (LIBs) are increasingly generated due to their widespread use for various energy-related applications. Spent LIBs contain several valuable metals including cobalt (Co) and lithium (Li) whose supply cannot be sustained in the long-term in view of their increased demand. To avoid environmental pollution and recover valuable metals, recycling of spent LIBs is widely explored using different methods.
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!