Background: Many traditional biological concepts continue to be debated by biologists, scientists and philosophers of science. The specific objective of this brief reflection is to offer an alternative vision to the definition of life taking as a starting point the traits common to all living beings.
Results And Conclusions: Thus, I define life as a process that takes place in highly organized organic structures and is characterized by being preprogrammed, interactive, adaptative and evolutionary. If life is the process, living beings are the system in which this process takes place. I also wonder whether viruses can be considered living things or not. Taking as a starting point my definition of life and, of course, on what others have thought about it, I am in favor of considering viruses as living beings. I base this conclusion on the fact that viruses satisfy all the vital characteristics common to all living things and on the role they have played in the evolution of species. Finally, I argue that if there were life elsewhere in the universe, it would be very similar to what we know on this planet because the laws of physics and the composition of matter are universal and because of the principle of the inexorability of life.
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http://dx.doi.org/10.1007/s11033-021-06594-5 | DOI Listing |
Yi Chuan
January 2025
State Key Laboratory for Conservation and Utilization of Bio-Resource in Yunnan, School of Life Sciences of Yunnan University, Kunming 650500, China.
Speciation research represents our thinking and exploration about how new species are generated and maintained, and it is one of the most important parts of evolutionary biology. Revealing new species formation modes, processes of reproductive isolation establishment and their intrinsic genetic mechanisms, are not only important issues and primary tasks in the field of speciation, but also the key clues for our understandings about the species diversity in nature. Here, by focusing on animal groups, we first introduced different definitions of species concept, and then summarized present research progress and important breakthroughs made in the speciation modes and molecular mechanism of reproductive isolation.
View Article and Find Full Text PDFGastro Hep Adv
September 2024
Section of Vascular and Interventional Radiology, Department of Radiology, Northwestern University, Chicago, Illinois.
Portal vein recanalization transjugular intrahepatic portosystemic shunt (PVR-TIPS) is a safe and effective procedure for decompression of portal hypertension (PH). In this short case series, 2 women with chronic noncirrhotic portal vein thrombosis were treated with PVR-TIPS. Both patients hoped to conceive.
View Article and Find Full Text PDFJ Psychosom Res
January 2025
Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; Department of Cardiac Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. Electronic address:
Background: Depression and cardiovascular health (CVH) are interconnected, and both are independently associated with mortality. However, the joint effects of depressive symptoms and CVH on mortality remain unclear.
Methods: By utilizing the National Health and Nutrition Examination Survey (NHANES) 2007-2018, we included 18,679 adults aged ≥20 years without cardiovascular diseases (CVD).
ASAIO J
January 2025
From the Department of Critical Care Medicine, Respiratory Institute, Cleveland Clinic, Cleveland, Ohio.
Right ventricular injury (RVI) in respiratory failure receiving veno-venous extracorporeal membrane oxygenation (VV ECMO) is associated with significant mortality. A scoping review is necessary to map the current literature and guide future research regarding the definition and management of RVI in patients receiving VV ECMO. We searched for relevant publications on RVI in patients receiving VV ECMO in Medline, EMBASE, and Web of Science.
View Article and Find Full Text PDFPediatrics
January 2025
Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada.
Background And Objectives: The likelihood and severity of neurodevelopmental impairment (NDI) affects critical health care decisions. NDI definitions were developed without parental perspectives. We investigated the agreement between parental vs medical classification of NDI among children born preterm.
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