Results 41 to 50 of about 5,168,176 (315)

Optical Absorptivity versus Molecular Composition of Model Organic Aerosol Matter [PDF]

open access: yes, 2009
Aerosol particles affect the Earth’s energy balance by absorbing and scattering radiation according to their chemical composition, size, and shape. It is generally believed that their optical properties could be deduced from the molecular composition of ...
Colussi, A. J.   +3 more
core   +2 more sources

Unexpected Dual Function of Plant YUCCA Enzymes Links Chlorophyll Catabolism to Auxin Homeostasis

open access: yesAngewandte Chemie, EarlyView.
YUCCA enzymes are well known to catalyze the main step of auxin biosynthesis in plants. Here, a hitherto undescribed dual function was discovered, revealing that some YUCCAs also act in chlorophyll degradation. In vitro feedback regulation furthermore suggests a link between chlorophyll degradation and hormone homeostasis and a physiological role of ...
Sina Rütschlin   +6 more
wiley   +2 more sources

Analysis of the Formation of Characteristic Aroma Compounds by Amino Acid Metabolic Pathways during Fermentation with Saccharomyces cerevisiae

open access: yesMolecules, 2023
Amino acid metabolic pathways can have profound impacts on the activities of key enzymes in the biosynthesis of specific aroma compounds during yeast fermentation. Aroma compounds, pyruvic acid and glucose were monitored in relation to the key enzymes of
Xingjun Lu   +3 more
doaj   +1 more source

Potential of Cheese-Associated Lactic Acid Bacteria to Metabolize Citrate and Produce Organic Acids and Acetoin

open access: yesMetabolites, 2023
Lactic acid bacteria (LAB) are pivotal in shaping the technological, sensory, and safety aspects of dairy products. The evaluation of proteolytic activity, citrate utilization, milk pH reduction, and the production of organic compounds, acetoin, and ...
Luana Faria Silva   +6 more
doaj   +1 more source

Ribosomal Synthesis of Topologically Defined Thioisoindole-Bridged Bicyclic Peptides. [PDF]

open access: yesAngew Chem Int Ed Engl
A flexible in vitro translation (FIT) system‐based strategy for ribosomal synthesis of thioisoindole‐bridged bicyclic (TiB) peptides is developed. The flexizyme substrate Ac‐Ala(NtBA)Sc‐CME is efficiently incorporated into FIT to generate ribosomal peptides bearing N‐terminal Ac‐Ala(NtBA)Sc as the cyclization handle, which after mild deprotection ...
Zhang Y, Vinogradov AA, Sun Y, Suga H.
europepmc   +3 more sources

Early pH Changes in Musculoskeletal Tissues upon Injury-Aerobic Catabolic Pathway Activity Linked to Inter-Individual Differences in Local pH [PDF]

open access: yes, 2020
Local pH is stated to acidify after bone fracture. However, the time course and degree of acidification remain unknown. Whether the acidification pattern within a fracture hematoma is applicable to adjacent muscle hematoma or is exclusive to this ...
Berkmann, Julia C.   +8 more
core   +2 more sources

Volatility Change during Droplet Evaporation of Pyruvic Acid

open access: yes, 2020
Atmospheric water-soluble organic gases such as pyruvic acid are produced in large quantities by photochemical oxidation of biogenic and anthropogenic emissions and undergo water-mediated reactions...
S. Petters   +5 more
semanticscholar   +1 more source

Role of the glassy dynamics and thermal mixing in the dynamic nuclear polarization and relaxation mechanisms of pyruvic acid

open access: yes, 2014
The temperature dependence of $^1$H and $^{13}$C nuclear spin-lattice relaxation rate $1/T_1$ has been studied in the 1.6 K - 4.2 K temperature range in pure pyruvic acid and in pyruvic acid containing trityl radicals at a concentration of 15 mM.
Carretta, Pietro   +5 more
core   +2 more sources

The biofilm matrix of Pseudomonas sp. OX1 grown on phenol is mainly constituted by alginate oligosaccharides [PDF]

open access: yes, 2006
The structure of the major constituent of the biofilm matrix produced by Pseudomonas sp. OX1, when grown on phenol as the sole carbon source is described.
ALFIERI, FABIANA   +6 more
core   +1 more source

Production of Singlet Oxygen (1O2) During the Photochemistry of Aqueous Pyruvic Acid: The Effects of pH and Photon Flux under Steady State O2(aq) Concentration.

open access: yesEnvironmental Science and Technology, 2019
The photochemistry of pyruvic acid (PA) in aqueous atmospheric particles produces reactive ketyl (K•) and acetyl (Y•) radicals that contribute to the production of secondary organic aerosol (SOA).
A. Eugene, M. Guzman
semanticscholar   +1 more source

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