Results 31 to 40 of about 1,890 (199)

Eukaryotic diversity at pH extremes

Frontiers in Microbiology, 2013
Extremely acidic (pH<3) and extremely alkaline (pH>9) environments support a diversity of single-cell and to a lesser extent, multicellular eukaryotic life.
Linda A. Amaral-Zettler, Linda A. Amaral-Zettler   +1 more
doaj   +1 more source

Biochemical Characterization of Recombinant Isocitrate Dehydrogenase and Its Putative Role in the Physiology of an Acidophilic Micrarchaeon

Microorganisms, 2021
Despite several discoveries in recent years, the physiology of acidophilic Micrarchaeota, such as “Candidatus Micrarchaeum harzensis A_DKE”, remains largely enigmatic, as they highly express numerous genes encoding hypothetical proteins. Due to a lacking
Dennis Winkler, Sabrina Gfrerer, Johannes Gescher   +2 more
doaj   +1 more source

Osmotic Imbalance, Cytoplasm Acidification and Oxidative Stress Induction Support the High Toxicity of Chloride in Acidophilic Bacteria

Frontiers in Microbiology, 2019
In acidophilic microorganisms, anions like chloride have higher toxicity than their neutrophilic counterparts. In addition to the osmotic imbalance, chloride can also induce acidification of the cytoplasm.
Javier Rivera-Araya, Javier Rivera-Araya, Andre Pollender, Dieu Huynh, Michael Schlömann, Renato Chávez, Gloria Levicán   +6 more
doaj   +1 more source

Acidophilic adenoma of the pituitary with polyneuropathy [PDF]

Journal of Neurology, Neurosurgery & Psychiatry, 1974
An acromegalic man aged 70 developed progressive polyneuropathy affecting mainly the extremities. The peripheral nerves showed hypertrophic neuropathy and accumulation of acid mucopolysaccharides in the nerve without `onion bulb' formation. The myelin showed a lamellar disintegration and vesicular formation.
U, Sandbank, B, Bornstein, T, Najenson
openaire   +2 more sources

Defining pH-associated ecological clusters and their responses to agricultural intensification

Geoderma
Soil pH is a major factor influencing the participation of soil microorganisms in biogeochemical processes. However, different microbial taxa exhibit varied responses to pH levels, and their ecological functions remain unclear.
Yi Ren, Shunan Xu, Yuanyuan Yan, Zhiyun Chen, Liangliang Liu, Xing Zhou, Zucong Cai, Xinqi Huang   +7 more
doaj   +1 more source

Domestication of Local Microbial Consortia for Efficient Recovery of Gold Through Top-Down Selection in Airlift Bioreactors

Frontiers in Microbiology, 2019
Extreme acidophiles play central roles in the geochemical cycling of diverse elements in low pH environments. This has been harnessed in biotechnologies such as biomining, where microorganisms facilitate the recovery of economically important metals such
Ricardo Ulloa, Ana Moya-Beltrán, Ana Moya-Beltrán, Camila Rojas-Villalobos, Harold Nuñez, Patricia Chiacchiarini, Edgardo Donati, Alejandra Giaveno, Raquel Quatrini, Raquel Quatrini   +9 more
doaj   +1 more source

Extremophiles in Soil Communities of Former Copper Mining Sites of the East Harz Region (Germany) Reflected by Re-Analyzed 16S rRNA Data

Microorganisms, 2021
The east and southeast rim of Harz mountains (Germany) are marked by a high density of former copper mining places dating back from the late 20th century to the middle age.
J. Michael Köhler, Nancy Beetz, Peter Mike Günther, Frances Möller, Jialan Cao   +4 more
doaj   +1 more source

Insights into the Quorum Sensing Regulon of the Acidophilic Acidithiobacillus ferrooxidans Revealed by Transcriptomic in the Presence of an Acyl Homoserine Lactone Superagonist Analogue

Frontiers in Microbiology, 2016
While a functional quorum sensing system has been identified in the acidophilic chemolithoautotroph Acidithiobacillus ferrooxidans ATCC 23270T and shown to modulate cell adhesion to solid substrates, nothing is known about the genes it regulates.
Sigde Mamani, Danièle Moinier, Yann Denis, Laurent Soulère, Yves Queneau, Emmanuel Talla, Violaine Bonnefoy, Nicolas Guiliani   +7 more
doaj   +1 more source

Adaptation of Coccomyxa sp. to Extremely Low Light Conditions Causes Deep Chlorophyll and Oxygen Maxima in Acidic Pit Lakes

Microorganisms, 2020
Deep chlorophyll maxima (DCM) and metalimnetic oxygen maxima (MOM) are outstanding biogeochemical features of acidic pit lakes (APL). However, knowledge of the eukaryotic phototrophs responsible for their formation is limited.
Javier Sánchez-España, Carmen Falagán, Diana Ayala, Katrin Wendt-Potthoff   +3 more
doaj   +1 more source

Metagenomic Mining for Esterases in the Microbial Community of Los Rueldos Acid Mine Drainage Formation

Frontiers in Microbiology, 2022
Acid mine drainage (AMD) systems are extremely acidic and are metal-rich formations inhabited by relatively low-complexity communities of acidophiles whose enzymes remain mostly uncharacterized. Indeed, enzymes from only a few AMD sites have been studied.
Paula Vidal, Mónica Martínez-Martínez, Laura Fernandez-Lopez, Sergi Roda, Celia Méndez-García, Olga V. Golyshina, Víctor Guallar, Víctor Guallar, Ana I. Peláez, Manuel Ferrer   +9 more
doaj   +1 more source