A5070297821- Planetary Science and Exploration
- Polar Research and Ecology
- Microbial Community Ecology and Physiology
- Lichen and fungal ecology
- Biocrusts and Microbial Ecology
- Astro and Planetary Science
- Space Science and Extraterrestrial Life
- Geochemistry and Elemental Analysis
- Isotope Analysis in Ecology
- Origins and Evolution of Life
- Building materials and conservation
- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Scientific Research and Discoveries
- Spaceflight effects on biology
- Amino Acid Enzymes and Metabolism
- Species Distribution and Climate Change
- Radioactive element chemistry and processing
- Protist diversity and phylogeny
- Phosphorus and nutrient management
- Chromium effects and bioremediation
- Space Exploration and Technology
- Gut microbiota and health
- Metabolism and Genetic Disorders
- Mycorrhizal Fungi and Plant Interactions
Desert Research Institute
2015-2025
Anhui Jianzhu University
2025
Cleveland Clinic
2023
Case Western Reserve University
2019
Tasly Holding Group (China)
2018
Jet Propulsion Laboratory
1999-2003
California Institute of Technology
2001
The 56 Fe/ 54 Fe of Fe-bearing phases precipitated in sedimentary environments varies by 2.5 per mil (δ values +0.9 to −1.6 mil). In contrast, the igneous rocks from Earth and moon does not vary measurably = 0.0 ± 0.3 Experiments with dissimilatory Fe-reducing bacteria genus Shewanella algae grown on a ferrihydrite substrate indicate that δ ferrous solution is isotopically lighter than 1.3 mil. Therefore, range may reflect biogenic fractionation, isotopic composition be used trace...
The combination of intense solar radiation and soil desiccation creates a short circuit in the biogeochemical carbon cycle, where soils release significant amounts CO2 reactive nitrogen oxides by abiotic oxidation. Here we show that desert accumulate metal superoxides peroxides at higher levels than non-desert soils. We also photogeneration equimolar superoxide hydroxyl radical desiccated aqueous soils, respectively, photo-induced electron transfer mechanism supported their mineralogical...
Soil sulfates are present in arid and hyperarid environments on Earth have been found to be abundant soils Mars. Examination of soil gypsum from the Atacama Desert, Chile, Mojave United States, Al‐Jafr Basin, Jordan, revealed endolithic cyanobacteria communities just below surface samples. Optical scanning electron microscope observations colonized layers indicated that unicellular Chroococcidiopsis is dominant cyanobacterium all studied communities. 16S rRNA gene analysis addition , a few...
Stable carbon isotope ratios (δ13C) were determined for alanine, proline, phenylalanine, valine, leucine, isoleucine, aspartate (aspartic acid and asparagine), glutamate (glutamic glutamine), lysine, serine, glycine, threonine from metabolically diverse microorganisms. The microorganisms examined included fermenting bacteria, organotrophic, chemolithotrophic, phototrophic, methylotrophic, methanogenic, acetogenic, acetotrophic, naturally occurring cryptoendolithic communities the Dry Valleys...
D-amino acids are toxic for life on Earth. Yet, they form constantly due to geochemical racemization and bacterial growth (the cell walls of which contain acids), raising the fundamental question how ultimately recycled. This study provides evidence that bacteria use as a source nitrogen by running enzymatic in reverse. Consequently, when soils inundated with racemic amino acids, resident consume D- well L-enantiomers, either simultaneously or sequentially depending level their racemase...
To assess the diversity of actinobacterial taxa in desert sands and obtain novel microbial resources, 79 50 samples were collected from Badain Jaran Tengger Deserts China, respectively. High-throughput sequencing environmental 16S rRNA genes was conducted on an Illumina Miseq platform. Based HTS analyses, cultivation-dependent techniques optimized to identify cultivable Actinobacteria members. A total 346,766 gene reads comprising 3,365 operational taxonomic units obtained BJD sands, while...
The dispersion of microorganisms through the atmosphere is a continual and essential process that underpins biogeography ecosystem development function. Despite ubiquity atmospheric globally, specific knowledge determinants microbial diversity at any given location remains unresolved. Here we describe bacterial in boundary layer underlying soil twelve globally distributed locations encompassing all major biomes, characterise contribution local distant soils to observed community. Across...
Diabetes is associated with low plasma vitamin C concentrations. We investigated the contribution of dysregulated renal physiology, its prevalence, and clinical characteristics. An essential prerequisite was determination normal threshold, concentration at which first appears in urine. Using data from 17 healthy participants who underwent depletion–repletion studies a dose range 15–1250 mg daily, threshold estimated using physiology-based pharmacokinetics modeling. Applying 95% CIs, we...
Under the rapid urbanization process, PM2.5 pollution has become an increasingly critical issue. Changes in land-use types will inevitably affect concentration. Meanwhile, problem of imbalance and inadequacy regional development remains prominent. This study took Huaihe River Ecological Economic Belt as research object, integrating spatial econometric model with Geographically Temporally Weighted Regression (GTWR) Multiscale (MGWR) models, to investigate spatiotemporal heterogeneity...
Scytonemin, a UV-protective pigment produced by cyanobacteria, is essential for microbial survival under extreme solar radiation. Recent studies suggest its structural analog, scytonemin imine, may serve as biosynthetic marker cyanobacteria exposed to intense light. Here, we present revision, revealing imine cyclic hydropyrrolo[2,3-b] indole, rather than the previously proposed primary imine. This reassignment supported 1D and 2D NMR, Q-TOF mass spectrometry, confirmatory synthesis, DFT...
Microorganisms and their biomineralisation processes are widespread in almost every environment on earth. In this work, Streptomyces luteogriseus DHS C014, a dominant lithophilous actinobacteria isolated from microbial mats limestone rocks, was used to investigate its potential allow better understanding of bacterial contributions carbonate mineralisation nature. The ammonium free-drift method with mycelium pellets, culture supernatant, spent the strain. Mineralogical analyses showed that...
We study the survival of single-strain Escherichia coli colonies in aqueous media exposed to 5.5 kV, 90 kA electrohydraulic discharges (EHD). The probability (Pn) a 4 × 107 cfu mL-1 E. population after n consecutive EHDs follows logit distribution: ln(Pn/100 − Pn) = 1.329 1.579 ln with r2 0.993 that corresponds lethal doses LD50 2.2 and LD90 10.5 EHDs. Considering reactor is thoroughly mixed during each discharge 0.9 values are nearly independent concentrations range 2 103 ≤ coli/cfu 3 106,...
A new biologically related, struvite-type phosphate mineral, hazenite, ideally KNaMg2(PO4)2⋅14H2O, has been found in and/or on completely dried-out or decomposed cyanobacteria porous calciumcarbonate (mainly calcite and aragonite) substrates Mono Lake, California. The mineral occurs as radiating clusters of prismatic crystals is colorless, transparent with white streak vitreous luster. It brittle, the Mohs hardness 2-2.5; cleavage good {001} no twinning was observed. measured calculated...
Objective: The goal for this study was to evaluate the effects of daily consumption Puer tea extract (PTE) on body weight, body-fat composition, and lipid profile in a non-Asian population absence dietary restrictions. Materials methods: A randomized, double-blind, placebo-controlled design used. total 59 overweight or mildly obese subjects were enrolled upon screening confirm fasting cholesterol level at above 220 mg/dL (5.7 mmol/dL). After giving informed consent, randomized consume PTE (3...
Bacteria in root nodules of legumes play important roles promoting plant growth. In this study, we investigated nodule-associated bacteria isolated from leguminous plants along an elevation gradient on the northern slope Kunlun Mountains, China, using a cultivation approach. total, 300 isolates were obtained seven legume species within six ecological zones. Isolates identified based 16S rRNA gene phylogenetic analysis and potential rhizobia further rec A phylogeny. Among isolates, Bacillales...
Asymmetrical utilization of chiral compounds has been sought on Mars as evidence for biological activity. This method was recently validated in glucose. Earth organisms utilize D-glucose, not L-glucose, a perfect asymmetry. In this study, we tested the lactate and found both enantiomers. Soil-, sediment-, lake-borne microbial communities prefer D-lactate but can consume L-lactate if given extra time to acclimate. situation is termed imperfect Future life-detection mission investigators need...
Two alternative hypotheses explain the degradation of organics in Viking Labeled Release experiment on Mars. Either martian soil contains live indigenous microorganisms or it is sterile but chemically reactive. These two possibilities could be distinguished by use pure preparations glucose isomers. In laboratory, selected eukaryotes, bacteria, and archaea consumed only D-glucose, not L-glucose, while permanganate oxidized both On Mars, selective consumption either D- L-glucose would...