Photochemical Cyclization of Tertiary Buta‐2,3‐dienamides to β‐Lactams Upon Triplet Energy Transfer
Angewandte Chemie, EarlyView.Energy transfer is the key to the successful photocyclization of the title compounds to 3,4‐disubstituted 2‐azetidinones. If the substituent at the nitrogen atom is primary (R2 = H), trans products are formed exclusively. The triplet state of xanthen‐9‐one (XT) was found to be quenched by an allene amide (R, R2 = H, R1 = Bn, and R3 = Ph) with a ...
Johannes Hofer +3 more
wiley +1 more source
Dietary ecology of the endangered seahorse Hippocampus haema unveiled through stable isotope analysis. [PDF]
Sci RepKim MJ +6 more
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Commentary: Revisiting Physiological and Theoretical Dimensions of Stable Isotope Variation in Human Tissues. [PDF]
Am J Hum BiolReitsema LJ.
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Inverse stable isotope probing-metabolomics (InverSIP) identifies an iron acquisition system in a methane-oxidizing bacterial community. [PDF]
Proc Natl Acad Sci U S ARobes JMD +5 more
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Discrimination Factor of Sulphur Stable Isotope Ratios Between Pregnant Fin Whales and Their Foetuses. [PDF]
Rapid Commun Mass SpectromRuiz-Sagalés M, Borrell A, Aguilar A.
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Trophic niche of invasive murid rodents in urban and peri-urban areas in South Africa: insights from stable isotope analysis. [PDF]
BMC ZoolRingani GV +3 more
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Nitrogen Fixation Potential in Bathypelagic Sediment of the Ice-Covered Arctic Ocean Revealed Through Long-Term Stable Isotope Incubations. [PDF]
Environ Microbiol Repvon Friesen LW +8 more
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Abstract Stable isotopes provide traceability throughout the ocean. The isotopes of a given chemical element have the same electronic structure and the same chemical behavior but slightly different weights. Therefore, slight variations of their relative abundance occur in nature because the atom diffusion speed and the atom bond strength
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High precision deuterium and 13C measurement by continuous flow-IRMS: Organic and position-specific isotope analysis. Carbon isotope effects on key reactions in plant metabolism and 13C-patterns in natural compounds. Intramolecular deuterium distributions and plant growth conditions. Stable isotope studies of soil nitrogen.
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Stable-isotope probing is a method used in microbial ecology that provides a means by which specific functional groups of organisms that incorporate particular substrates are identified without the prerequisite of cultivation. Stable-isotope-labeled carbon (13C) or nitrogen (15N) sources are assimilated into microbial biomass of environmental samples ...
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