Carbonaceous Chondrite (CC) meteorites are fragments of asteroids, solar planetesimals that never became large enough to separate matter by their density, like terrestrial planets. CC contains various amounts of organic carbon and carry a record of chemical evolution as it came to be in the Solar System, at the time the Earth was formed and before the origins of life. We review this record as it pertains to the chiral asymmetry determined for several organic compounds in CC, which reaches a broad molecular distribution and enantiomeric excesses of up to 50%–60%. Because homochirality is an indispensable attribute of extant polymers and these meteoritic enantiomeric excesses are still, to date, the only case of chiral asymmetry in organic molecules measured outside the biosphere, the possibility of an exogenous delivery of primed prebiotic compounds to early Earth from meteorites is often proposed. Whether this exogenous delivery held a chiral advantage in molecular evolution remains an open question, as many others regarding the origins of life are.
from #Medicine via ola Kala on Inoreader http://ift.tt/1qo5aaf
via IFTTT
Αρχειοθήκη ιστολογίου
-
►
2023
(138)
- ► Φεβρουαρίου (74)
- ► Ιανουαρίου (64)
-
►
2022
(849)
- ► Δεκεμβρίου (61)
- ► Σεπτεμβρίου (74)
- ► Φεβρουαρίου (65)
-
►
2021
(2936)
- ► Δεκεμβρίου (59)
- ► Σεπτεμβρίου (180)
- ► Φεβρουαρίου (325)
-
►
2020
(1624)
- ► Δεκεμβρίου (293)
- ► Σεπτεμβρίου (234)
- ► Φεβρουαρίου (28)
-
►
2019
(13362)
- ► Δεκεμβρίου (19)
- ► Σεπτεμβρίου (54)
- ► Φεβρουαρίου (5586)
- ► Ιανουαρίου (5696)
-
►
2018
(66471)
- ► Δεκεμβρίου (5242)
- ► Σεπτεμβρίου (5478)
- ► Φεβρουαρίου (4835)
- ► Ιανουαρίου (5592)
-
►
2017
(44259)
- ► Δεκεμβρίου (5110)
- ► Σεπτεμβρίου (5105)
-
▼
2016
(7467)
- ► Δεκεμβρίου (514)
- ► Σεπτεμβρίου (1038)
-
▼
Απριλίου
(500)
-
▼
Απρ 13
(50)
- Metformin use and survival of patients with pancre...
- Ischemic colitis as a complication of medication u...
- Cost-effectiveness of Crohn’s disease post-operati...
- Sphingosine-1-phosphate receptor-1 (S1P1) is expre...
- Acceptability of rapid point-of-care hepatitis C t...
- Metformin enhances the response to radiotherapy in...
- The prognostic value of lactate dehydrogenase leve...
- The prognostic value of rectal invasion for stage ...
- Gastrointestinal tract colonization dynamics by di...
- Entropy, Vol. 18, Pages 133: Correction on Liu, X....
- Entropy, Vol. 18, Pages 136: Correction: Kay, B.S....
- Incidence and Etiology of Potentially Preventable ...
- Critical Illness Is Associated With Impaired Gallb...
- Cerebral Oximetry During Cardiac Arrest: A Multice...
- Pediatric Triage in a Severe Pandemic: Maximizing ...
- Cardiac Arrests Associated With Tracheal Intubatio...
- Elevated Leukocyte Azurophilic Enzymes in Human Di...
- The Efficacy of Noble Gases in the Attenuation of ...
- Acute and Subchronic Oral Toxicity Evaluation of A...
- Sustainability, Vol. 8, Pages 362: Solar Energy Bl...
- Geosciences, Vol. 6, Pages 22: An Overview of the ...
- Sustainability, Vol. 8, Pages 361: An Optimization...
- Crystals, Vol. 6, Pages 42: Rb2Na(NO3)3: A Congrue...
- Sustainability, Vol. 8, Pages 364: Conceptualizing...
- Metals, Vol. 6, Pages 85: Corrosion Resistance of ...
- Buildings, Vol. 6, Pages 17: Design of Sustainable...
- IJERPH, Vol. 13, Pages 420: Restoration in Its Nat...
- Life, Vol. 6, Pages 18: Molecular Asymmetry in Pre...
- Water, Vol. 8, Pages 143: Can Rapid Assessments Pr...
- Sensors, Vol. 16, Pages 531: Towards A Self Adapti...
- Toxins, Vol. 8, Pages 107: Review Over a 3-Year Pe...
- JCM, Vol. 5, Pages 47: Management of Status Epilep...
- Polymers, Vol. 8, Pages 139: Enzyme-Catalyzed Synt...
- Micromachines, Vol. 7, Pages 66: Micro-Shaping of ...
- Sensors, Vol. 16, Pages 528: Development of a Low-...
- Toxins, Vol. 8, Pages 109: Metal Ion Activation of...
- IJERPH, Vol. 13, Pages 415: Pain Assessment–Can it...
- Nanomaterials, Vol. 6, Pages 68: Gold Nanomaterial...
- Applied Sciences, Vol. 6, Pages 108: WIPP: Wi-Fi C...
- Atmosphere, Vol. 7, Pages 56: Assessment of Air Qu...
- Sensors, Vol. 16, Pages 530: MGRA: Motion Gesture ...
- Toxins, Vol. 8, Pages 109: Metal Ion Activation of...
- Plants, Vol. 5, Pages 17: Canola/Rapeseed Protein:...
- Vision, Vol. 1, Pages 2: Comparing Macular Thickne...
- Improving distress in dialysis (iDiD): a feasibili...
- Opportunistic screening of atrial fibrillation by ...
- Combined early and adult life risk factor associat...
- Molecular genetics and epigenetics of nonfamilial ...
- Development and significance of automated history-...
- The effect of tailored Web-based interventions on ...
-
▼
Απρ 13
(50)
- ► Φεβρουαρίου (793)
Αναζήτηση αυτού του ιστολογίου
Τετάρτη 13 Απριλίου 2016
Life, Vol. 6, Pages 18: Molecular Asymmetry in Prebiotic Chemistry: An Account from Meteorites
Εγγραφή σε:
Σχόλια ανάρτησης (Atom)
-
Αλέξανδρος Γ. Σφακιανάκης Medicine by Alexandros G. Sfakianakis,Anapafseos 5 Agios Nikolaos 72100 Crete Greece,00302841026182,0030693260717...
-
heory of COVID-19 pathogenesis Publication date: November 2020Source: Medical Hypotheses, Volume 144Author(s): Yuichiro J. Suzuki ScienceD...
-
Alimentary Pharmacology &Therapeutics, EarlyView. https://ift.tt/2qECBIJ
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου
Σημείωση: Μόνο ένα μέλος αυτού του ιστολογίου μπορεί να αναρτήσει σχόλιο.