Results 111 to 120 of about 9,324 (253)

Correlating Mineralogy and Amino Acid Contents of Milligram-Scale Murchison Carbonaceous Chondrite Samples [PDF]

open access: yes
Amino acids, the building blocks of proteins, have been found to be indigenous in most of the carbonaceous chondrite groups. The abundances of amino acids, as well as their structural, enantiomeric and isotopic compositions differ significantly among ...
Berger, Eve L.   +5 more
core   +1 more source

Alamethicin self-assembling in lipid membranes: concentration dependence from pulsed EPR of spin labels [PDF]

open access: yes, 2018
The antimicrobial action of the peptide antibiotic alamethicin (Alm) is commonly related to peptide self-assembling resulting in the formation of voltage-dependent channels in bacterial membranes, which induces ion permeation.
De Zotti, Marta   +4 more
core   +1 more source

Validation of Dynamic Contrast-Enhanced Magnetic Resonance Imaging-Derived Vascular Permeability Measurements Using Quantitative Autoradiography in the RG2 Rat Brain Tumor Model

open access: yesNeoplasia: An International Journal for Oncology Research, 2007
Dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) is widely used to evaluate tumor permeability, yet measurements have not been directly validated in brain tumors.
Moira C. Ferrier   +9 more
doaj   +1 more source

α-Aminoisobutyric acid: A single amino acid chain inverter

open access: yes, 2018
Department of Chemistry, Muragachha Government College, University of Kalyani, Nadia-741 235, West Bengal, India E-mail: rajibsarkar.org@gmail.com Manuscript received 16 July 2018, accepted 27 August 2018 A tripeptide, Boc-(L)-Leu(1)-Aib(2)-(L)-Leu(3)-OMe, 1 containing a-aminoisobutyric acid and a coded amino acid was synthe­sized and fully ...
openaire   +1 more source

Integrating the Field of Prebiotic Chemistry into a Christian Worldview [PDF]

open access: yes, 2017
This thesis will provide an overarching examination into the scientific field of prebiotic chemistry, the purported chemistry of the formation of life on earth.
Anderson, Matthew B
core  

The Impact and Oxidation Survival of Selected Meteoritic Compounds: Signatures of Asteroid Organic Material on Planetary Surfaces [PDF]

open access: yes, 2013
Polar, non-volatile organic compounds may be present on the surfaces (or near surfaces) of multiple Solar System bodies. If found, by current or future missions, it would be desirable to determine the origin(s) of such compounds, e.g., asteroidal or in ...
Chang, Sherwood   +3 more
core   +1 more source

Nanoflow Separation of Amino Acids for the Analysis of Cosmic Dust [PDF]

open access: yes, 2008
The delivery of amino acids to the early Earth by interplanetary dust particles, comets, and carbonaceous meteorites could have been a significant source of the early Earth's prebiotic organic inventory.
Dworkin, Jason P.   +2 more
core   +1 more source

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