Results 41 to 50 of about 6,179,886 (326)
The Organic Matter of Chernozem
Бюллетень Почвенного института им. В.В. Докучаева, 2017 Theories and points of view of soil science classics, such as V. V. Dokuchaev, I. V. Turin and M. M. Kononva on chernozem organic matter are reviewed in this work.
B. M. Kogut
doaj +1 more source
Carbon isotope effects in the sorption of chlorinated ethenes on biochar and activated carbon
Heliyon, 2023 As an alternative to activated carbon, biochar is a promising, environmentally friendly sorbent that can be used to remove organic groundwater pollutants, such as chlorinated ethenes (CEs).
Simon Leitner +5 more
doaj +1 more source
The Chemical Fractionation of Rabbit and Swine Thymus [PDF]
The Journal of Cell Biology, 1957 A chemical fractionation procedure, previously found applicable to bovine thymus and bovine and ovine palatine tonsils, was used to fractionate rabbit and hog thymus. With respect to the chemical fractionation steps, yields of fractions, and optical and electrophoretic properties, extracts from hog and rabbit thymus were indistinguishable from similar ...
E L, HESS, S E, LAGG
openaire +2 more sources
First measurements of 15N fractionation in N2H+ toward high-mass star forming cores [PDF]
, 2015 We report on the first measurements of the isotopic ratio 14N/15N in N2H+ toward a statistically significant sample of high-mass star forming cores. The sources belong to the three main evolutionary categories of the high-mass star formation process ...
Bizzocchi, L. +4 more
core +2 more sources
Barium isotopic fractionation during strong weathering of basalt in a tropical climate
Environment International, 2020 Barium (Ba) is an element which is toxic to humans, plants, and animals. Deciphering the geochemical behavior of Ba in soils is fundamental for assessing the potentials risks posed by Ba. Ba isotopes are a potentially robust tracer of Ba in soils.
Yingzeng Gong +6 more
doaj +1 more source
Two phase residence time distribution in a modified twin screw extruder [PDF]
, 1999 Biomass fractionation is performed with a modified Clextral twin-screw extruder used as a thermo-mechano-chemical reactor. This new process is firstly analyzed.
Altamore +13 more
core +2 more sources
Molecular bases of circadian magnesium rhythms across eukaryotes
FEBS Letters, EarlyView.Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley +1 more source
Energies, 2022 Particulate matter (PM) pollution from coal combustion is a leading contributor to the influence of atmospheric visibility, photochemical smog, and even global climate.
Qiaoqun Sun +8 more
doaj +1 more source
Potassium isotope fractionation during chemical weathering of basalts
Earth and Planetary Science Letters, 2020 Non-traditional stable isotopes (e.g., Li, Mg, and Si) are increasingly used as tracers for studying Earth's surface processes. The isotopes of potassium (K), a highly soluble and mobile element during weathering, could be a promising new tracer for ...
Heng Chen, Xiao-Ming Liu, Kun Wang
semanticscholar +1 more source
Detection of OD towards the low-mass protostar IRAS16293-2422
, 2012 Although water is an essential and widespread molecule in star-forming regions, its chemical formation pathways are still not very well constrained. Observing the level of deuterium fractionation of OH, a radical involved in the water chemical network ...
Belloche, A. +8 more
core +1 more source