Beugholt, Alexander Büchner, Kai Geier, Dominik Ulrich Becker, Thomas
Published in
Frontiers in Chemical Engineering
When confronted with environmental stress, yeast cell reacts, among others, by modifying the expression of specific genes. In this study, gene expression was analyzed via RT-qPCR to quantify the oxidative stress of Saccharomyces pastorianus during yeast propagation as a reaction to different aeration levels. Target genes were identified, and a refe...
Wang, Zhenyu Liu, Feifei Li, Enze Yuan, Yongqiang Yang, Yonggang Xu, Meiying Qiu, Rongliang
Published in
Frontiers in Microbiology
Over-aeration is a common remediation strategy for black and odorous water bodies, in which oxygen is introduced to impact aquatic microbial communities as an electron acceptor of high redox potential. In this study, black-odorous freshwater sediments were cultured for 9 weeks under aeration to investigate microbial covariations at different depths...
Ahmadi, Mehrdad Doroodmand, Mohammad Mahdi Nabi Bidhendi, Gholamreza Torabian, Ali Mehrdadi, Nasser
Published in
Frontiers in Energy Research
The aerobic wastewater treatments depend on the aeration. Hence, the size of the bubbles used in the aeration system may play a crucial role in this regard. This study attempted to investigate the effects of aeration bubble size on wastewater treatment efficiency of a “sequence batch reactor” (SBR) system at a laboratory scale using a novel designe...
Lapham, Laura L. Hobbs, Edward A. Testa, Jeremy M. Heyes, Andrew Forsyth, Melinda K. Hodgkins, Casey Szewczyk, Curtis Harris, Lora A.
Published in
Frontiers in Environmental Science
Engineered aeration is one solution for increasing oxygen concentrations in highly eutrophic estuaries that undergo seasonal hypoxia. Although there are various designs for engineered aeration, all approaches involve either destratification of the water column or direct injection of oxygen or air through fine bubble diffusion. To date, the effect o...
hao, aimin hong, yu kobayashi, sohei xia, dong zhao, min iseri, yasushi
The release of nutrients and metals from the sediment to the overlying water induced by oxygen depletion is an important issue in eutrophic aquatic systems. Effects of light-emitting diode (LED) illumination on oxygen conditions and release of nutrients and metals from the sediment were examined by comparing with those effects of aeration in microc...
Wang, Rui Shi, Weiming Li, Yilin
Published in
Frontiers in Environmental Science
Excessive application of phosphate fertilizer is common in vegetable fields and causes deterioration of the rhizosphere environment, that is, the soil oxygen (O2) environment, which further constrains root morphology construction and limits vegetable yield. Nevertheless, the interaction between root morphology and the response of the rhizosphere O2...
wang, yameng deng, jun wei, wangru
A chute aerator is a device that entrains air into water and protects against cavitation erosion. The state of the jet cavity determines the aerator efficiency under different flow conditions. In the case of a low Froude number and low velocity, backwater is generated in the jet cavity. In severe cases, this backwater blocks the air intake holes an...
brondi, cosimo santiago-calvo, mercedes di maio, ernesto rodríguez-perez, miguel ángel
In this study, we investigated the influence of mixing conditions on the foaming process of water blown polyurethane (PU) foams obtained at different mixing speeds (50, 500, 1000 and 2000 rpm). In particular, the morphological evolution during the foaming process, in terms of the bubble size and bubble density, was studied via optical observations,...
Huang, Ming-Qing Zhang, Ming Zhan, Shu-Lin Chen, Lin Xue, Zhen-Lin
Published in
Frontiers in Microbiology
In situ fragmentation bioleaching is a promising way to perform deep mining safely, economically, and in an environmentally friendly manner, where oxygen plays a critical role in microbial growth and mineral dissolution. However, the lack of oxygen limits the implementation of in-situ fragmentation bioleaching. To overcome this limitation, aeration...
gorczyca, maria kaźmierczak, jan fickers, patrick celińska, ewelina
While overproduction of recombinant secretory proteins (rs-Prots) triggers multiple changes in the physiology of the producer cell, exposure to suboptimal growth conditions may further increase that biological response. The environmental conditions may modulate the efficiency of both the rs-Prot gene transcription and translation but also the polyp...
