Mesozoic strata record numerous negative and positive carbon isotope excursions (CIE). The Middle Jurassic records a negative ~0.5‰ CIE at the Aalenian-Bajocian boundary followed by a positive ~1.5‰ CIE covering the entire early Bajocian. Although these CIEs are recorded in northern and southern western Tethys and may reflect perturbations to the g...
Published in Environmental science & technology
Monobromamine (NH2Br) and dibromamine (NHBr2) produced from reactions of hypobromous acid (HOBr) with ammonia can react with phenolic structures of natural organic matter (NOM) to produce disinfection byproducts such as bromoform (CHBr3). The reactivity of NH2Br was controlled by the reaction of the bromoammonium ion (NH3Br+) with phenolate species...
Published in Frontiers in Soil Science
Introduction Improving soil fertility is a top priority in Florida’s citrus growing regions, especially in the age of Huanglongbing (HLB; also known as citrus greening). This disease severely reduces fine root mass, causes higher incidences of nutrient deficiencies, and eventually results in the death of affected trees. Additionally, the soils comm...
Published in Environmental Research Letters
Thawing of ice-rich permafrost soils in sloped terrain can lead to activation of retrogressive thaw slumps (RTSs) which make organic matter available for decomposition that has been frozen for centuries to millennia. Recent studies show that the area affected by RTSs increased in the last two decades across the pan-Arctic. Combining a model of soil...
Published in Biological reviews of the Cambridge Philosophical Society
The deep sea is amongst the most food-limited habitats on Earth, as only a small fraction (
Published in Frontiers in Marine Science
Introduction Foraminiferal shells are extensively used to reconstruct the marine environment in the geological past. The foraminifera test-bound organic material (FBOM), sheltered by the test from potential diagenetic alteration and contamination, has great feasibility to improve our understanding of carbon and nitrogen cycling. The FBOM δ13C has b...
Published in Frontiers in Earth Science
The organic-rich shale in the first member of the Qingshankou Formation, which is located in the southern Songliao Basin, is regarded as a high-quality source rock in East China. Geochemistry parameters were utilized to illustrate the formation and preservation conditions of the Qing1 Member in the Changling Sag, southern Songliao Basin. In the pre...
Published in Frontiers in Soil Science
Soil organic carbon (SOC) is considered a significant contributor to soil water retention. However, generalizations about the role of SOC in available water-holding capacity (AWHC) may have inaccurately portrayed this relationship. We aim to reexamine the relationship between SOC and water retention using the National Cooperative Soil Survey (NCSS)...
V svetu poznamo številne primere kamnin, ki vsebujejo prevladujočo, pomembno, značilno ali le pojavno vsebnost organske snovi. Še posebno zanimive za preučevanje so z organsko snovjo primarno bolj ali manj obogatene sedimentne kamnine, ki lahko predstavljajo tudi izvorne kamnine za nastanek zemeljske nafte in/ali plina. Osrednja tema doktorske dise...
Published in Frontiers in Earth Science
Shales are composed of minerals and organic matter, whose individual properties are essential to determining the rock’s macroscopical deformation and strength. Scanning electron microscopy combined with electron energy dispersive spectroscopy (EDS) has been extensively used to evaluate composition, while peak-force atomic force microscopy (AFM) has...
