Results 11 to 20 of about 1,842,096 (265)

Hydrogen Bonds and Life in the Universe

Life, 2018
The scientific community is allocating more and more resources to space missions and astronomical observations dedicated to the search for life beyond Earth.
Giovanni Vladilo, Ali Hassanali
doaj   +1 more source

Gene expression reaction norms unravel the molecular and cellular processes underpinning the plastic phenotypes of Alternanthera philoxeroides in contrasting hydrological conditions

Frontiers in Plant Science, 2015
Alternanthera philoxeroides is an amphibious invasive weed that can colonize both aquatic and terrestrial habitats. Individuals growing in different habitats exhibit extensive phenotypic variation but little genetic differentiation. Little is known about
Lexuan eGao, Lexuan eGao, Yupeng eGeng, Hongxing eYang, Yonghong eHu, Ji eYang   +5 more
doaj   +1 more source

Symmetric Atom–Atom and Ion–Atom Processes in Stellar Atmospheres

Atoms, 2017
We present the results of the influence of two groups of collisional processes (atom–atom and ion–atom) on the optical and kinetic properties of weakly ionized stellar atmospheres layers.
Vladimir A. Srećković, Ljubinko M. Ignjatović, Milan S. Dimitrijević   +2 more
doaj   +1 more source

UV irradiation of ethanol-containing interstellar ice analogs

Astronomy & Astrophysics
Context. Ethanol (CH3CH2OH) has been detected in interstellar ices within regions associated with the early stages of star and planet formation. Because of its ability to form through multiple gas- and solid-phase pathways, ethanol is found in a range of
DeVine J. A., Terwisscha van Scheltinga J., Ioppolo S., Chuang K.-J., van Dishoeck E. F., Lamberts T.   +5 more
doaj   +1 more source

Chemistry and ro-vibrational excitation of CH+ in the planetary nebula NGC 7027

Astronomy & Astrophysics
Context. Small carbon hydride cations, such as methylidynium (CH+), are important in the chemistry of the interstellar medium. They participate in a network of gas-phase reactions with a range of molecular and atomic species and lead to the formation of ...
Sil M., Faure A., Wiesemeyer H., Hily-Blant P., González-Lezana T., Forer J., Loreau J., Lique F.   +7 more
doaj   +1 more source

Collisional rate coefficients for OH–H2 at high temperatures

Astronomy & Astrophysics
Context. OH is a cornerstone molecule in the chemistry of interstellar and circumstellar media and is ubiquitously detected in warm gas thanks to its infrared rotational lines. However, the excitation processes of OH remain poorly characterized. Aims. We
van den Heuvel Z., Tabone B., van Dishoeck E. F., Groenenboom G. C., van der Avoird A.   +4 more
doaj   +1 more source

Absolute measurement of state-resolved charge-exchange cross sections for C4+ colliding with H2

Astronomy & Astrophysics
Context. Solar wind interaction with planetary atmosphere and cometary coma is a fundamental process for space weather studies. Observations of extremely ultraviolet and soft X-ray emissions are generally attributed to charge exchange between highly ...
Yin H., Meng T., Zhang R. T., Ma P. F., Wu Y., Yao K., Xiao J., Zou Y., Ma X., Tu B., Wei B.   +10 more
doaj   +1 more source

Molecular Blueprinting by Word Processing

Symmetry, 2023
In this work, computer-assisted writing techniques for linear expressions of the structure of polycyclic molecules, branched molecules and clusters, based on formal languages, are tested. The techniques used only require the ability to process written texts, even just using a text editor, and one of the many available molecular drawing/optimization ...
openaire   +3 more sources

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen, Calogero Virgone, Antje Redlich, Michael Abele, Ricardo Lopez‐Almaraz, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Maja Mazic Cesen, Andrea Ferrari, Malgorzata A. Krawczyk, Yves Reguerre, Dominik T. Schneider, Ines B. Brecht, Charlotte Rigaud, Bilgehan Yalcin, Rainer Claus, Christian Vokuhl, Constantin Lapa, Jörg Fuchs, Segolene Hescot, Thomas Walter, Julien Hadoux, Daniel Orbach   +23 more
wiley   +1 more source

Genomic Diversity and Clinical Variability in Pediatric Primary Cutaneous Anaplastic Large Cell Lymphoma: A Case Series

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Primary cutaneous anaplastic large cell lymphoma (pcALCL) is a rare pediatric CD30‐positive T‐cell lymphoproliferative disorder with an excellent prognosis, but its genomic drivers are poorly defined. We report three children with skin‐limited disease demonstrating striking molecular heterogeneity, including NPM::ALK, NUP214::FRK, and a novel ...
Shoshana Greenberger, Efrat Bar‐Ilan, Victoria Marcu, Evgeny Grishin, Rinat Yacobi, Aviv Barzilai, Hana Golan, Assaf Arie Barg   +7 more
wiley   +1 more source