Results 41 to 50 of about 361,547 (333)

Ancient Mitogenomes Reveal the Origins and Genetic Structure of the Neolithic Shimao Population in Northern China

Frontiers in Genetics, 2022
Shimao City is considered an important political and religious center during the Late Neolithic Longshan period of the Middle Yellow River basin. The genetic history and population dynamics among the Shimao and other ancient populations, especially the ...
Jiayang Xue, Jiayang Xue, Wenjun Wang, Wenjun Wang, Jing Shao, Xiangming Dai, Zhouyong Sun, Jacob D. Gardner, Liang Chen, Xiaoning Guo, Nan Di, Xuesong Pei, Xiaohong Wu, Ganyu Zhang, Can Cui, Can Cui, Peng Cao, Feng Liu, Qingyan Dai, Xiaotian Feng, Ruowei Yang, Wanjing Ping, Wanjing Ping, Lizhao Zhang, Nu He, Qiaomei Fu, Qiaomei Fu, Qiaomei Fu   +27 more
doaj   +1 more source

Hitting Times of Some Critical Events in RNA Origins of Life. [PDF]

Life (Basel), 2021
Can a replicase be found in the vast sequence space by random drift? We partially answer this question through a proof-of-concept study of the times of occurrence (hitting times) of some critical events in the origins of life for low-dimensional RNA ...
Bastian CD, Rabitz H.
europepmc   +2 more sources

SEM Analyses of Fossilized Chondrocytes in the Extinct Birds Yanornis and Confuciusornis: Insights on Taphonomy and Modes of Preservation in the Jehol Biota

Frontiers in Earth Science, 2021
Calcified cartilage is a vertebrate tissue that has unique characteristics, such as a high percentage of calcification, avascularity and cells with apparently delayed autolytic processes after death. All of these factors suggest that fossilized cartilage
Alida M. Bailleul, Alida M. Bailleul, Zhonghe Zhou, Zhonghe Zhou   +3 more
doaj   +1 more source

Association between cord blood metabolites in tryptophan pathway and childhood risk of autism spectrum disorder and attention-deficit hyperactivity disorder

Translational Psychiatry, 2022
Alterations in tryptophan and serotonin have been implicated in various mental disorders; but studies are limited on child neurodevelopmental disabilities such as autism spectrum disorder (ASD) and attention-deficit hyperactivity disorder (ADHD).
Ramkripa Raghavan, Neha S. Anand, Guoying Wang, Xiumei Hong, Colleen Pearson, Barry Zuckerman, Hehuang Xie, Xiaobin Wang   +7 more
doaj   +1 more source

Investigating Possible Gastroliths in a Referred Specimen of Bohaiornis guoi (Aves: Enantiornithes)

Frontiers in Earth Science, 2021
Gastroliths, where preserved, can provide indirect evidence regarding diet in extinct avian and non-avian dinosaurs. Masses of gastroliths consistent with the presence of a gastric mill are preserved in many Early Cretaceous Jehol birds mostly belonging ...
Shumin Liu, Shumin Liu, Zhiheng Li, Zhiheng Li, Alida M. Bailleul, Alida M. Bailleul, Min Wang, Min Wang, Jingmai O’Connor, Jingmai O’Connor, Jingmai O’Connor   +10 more
doaj   +1 more source

The ambivalent role of water at the origins of life

FEBS Letters, 2020
Life as we know it would not exist without water. However, water molecules not only serve as a solvent and reactant but can also promote hydrolysis, which counteracts the formation of essential organic molecules.
Andrey do Nascimento Vieira, K. Kleinermanns, W. Martin, Martina Preiner   +3 more
semanticscholar   +1 more source

Origins, (Co)Evolution and Diversity of Life [PDF]

, 2020
Some of the mayor known unknowns of modern science deal with how lifeappeared on Earth and how from there it diversified into the different life forms present today.
Elena, Santiago F., Casares, Fernando, Maeso, Ignacio, Briones, Carlos, Zardoya, Rafael, García-Ruiz, Eva, Valpuesta, José M., Ramón-Maiques, Santiago, Lalueza-Fox, Carles, Buceta, Javier, Torre Sainz, Ignacio de la, Ares, Saúl, Rivas, Germán, Comas, Iñaki, Jiménez-Serra, Izaskun, Manzanares, Miguel, Riesgo Gil, Ana, Bovolenta, Paola, Valverde, Sergi   +18 more
core   +1 more source

The Bootstrap Model of Prebiotic Networks of Proteins and Nucleic Acids

Life, 2022
It is not known how life arose from prebiotic physical chemistry. How did fruitful cell-like associations emerge from the two polymer types—informational (nucleic acids, xNAs = DNA or RNA) and functional (proteins)?
Thomas Farquharson, Luca Agozzino, Ken Dill   +2 more
doaj   +1 more source

Three tissue resident macrophage subsets coexist across organs with conserved origins and life cycles

Science immunology, 2022
Description High-dimensional analysis reveals three macrophage subsets with common transcriptional and biological properties across organs. Mapping macrophage heterogeneity Tissue resident macrophages have specific roles in homeostasis, inflammation, and
Sarah A. Dick, Anthony Wong, Homaira Hamidzada, S. Nejat, Robert Nechanitzky, S. Vohra, Brigitte Mueller, Rysa Zaman, Crystal Kantores, Laura Aronoff, A. Momen, Duygu Nechanitzky, Wanda Y. Li, Parameswaran Ramachandran, S. Q. Crome, B. Becher, M. Cybulsky, F. Billia, S. Keshavjee, S. Mital, Clint S. Robbins, T. Mak, S. Epelman   +22 more
semanticscholar   +1 more source

Various Viewpoints to Investigate the Origins of Life Are Needed. [PDF]

Life (Basel)
How life first arose on Earth is a mystery that humankind has sought to understand for millennia, and includes scientific, philosophical, societal, and religious aspects, amongst others [...
Jia TZ, Chandru K.
europepmc   +2 more sources