Methane production and archaeal community composition were studied in samples from an acidic peat bog incubated at different temperatures and pH values. H(2)-dependent methanogenesis increased strongly at the lowest pH, 3.8, and Methanobacteriaceae became important except for Methanomicrobiaceae and Methanosarcinaceae. An acidophilic and psychrotolerant Methanobacterium sp. was isolated using H...

BACKGROUND Despite the prevalent use of Drosophila as a model in studies of nutrition, the effects of fundamental food properties, such as pH, on animal health and behavior are not well known. OBJECTIVES We examined the effect of food pH on adult Drosophila lifespan, feeding behavior, and microbiota composition and tested the hypothesis that pH-mediated changes in palatability and total consu...

• Soil pH was a key driver of N2O emission and sources in acidic soils. significantly positively associated with the ratio ITS to 16S. correlated bacterial fungal community composition. Fungi contributed highly tea plantations vegetable fields. Acidic soil is main source global nitrous oxide (N2O) emissions. However, mechanism behind high emissions from soils remains knowledge gap. The objectiv...

Changes between the main types of mucins in goblet cells and colonic microbiota obese rats were studied. Paraffin histological slides colon control stained with periodic Schiff (to visualize all cells), alcian blue pH 2.5 acidic mucins), aldehyde fuschin sulphomucins), distinguish neutral sialo- sulphomucins). Also, composition feces was determined on selective differential media. It has been s...

The acidic glycosphingolipid composition of human uterine endometrial adenocarcinoma was compared with those of normal uterine endometrium at the proliferative and the secretory phases. Upon chemical composition analysis, no significant transformation-associated change of these glycolipids was observed. However, when cancer cells from the patients with human uterine endometrial adenocarcinoma w...

Although the molecular mechanisms underlying the pathology of amyloidoses are not well understood, the interaction between amyloid proteins and cell membranes is thought to play a role in several amyloid diseases. Amyloid fibrils of β2-microglobulin (β2m), associated with dialysis-related amyloidosis (DRA), have been shown to cause disruption of anionic lipid bilayers in vitro. However, the eff...

The pool of soil organic carbon (SOC) in the Arctic is disproportionally large compared to those in other biomes. This large quantity of SOC accumulated over millennia due to slow rates of decomposition relative to net primary productivity. Decomposition is constrained by low temperatures and nutrient concentrations, which limit soil microbial activity. We investigated how nutrients limit bacte...

Nephrolithiasis is one of the most frequent urologic diseases. The aim of this paper is to study the composition and frequency of 8854 patient kidney stones and in a subset of them their metabolic risk factors to be related to their type of calculi. Physicochemical and crystallographic methods were used to assess kidney stone composition. In a subset of 715 patients, we performed an ambulatory ...

Within foxings, the paper is weaker, more acidic, and more friable than outside of them. Foxings can appear because of iron oxidation or due to the influence of microorganisms. At present, the nature of foxings is still under discussion. The chemical composition and structure of foxings are insufficiently characterized. Moreover, these processes can vary depending on external conditions and the...