Results 61 to 70 of about 7,177,335 (349)

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Close - up imaging of Oxia Planum analogue samples under different illumination conditions: preparing for the ExoMars rover mission

Frontiers in Astronomy and Space Sciences
ExoMars is an astrobiology program led by the European Space Agency, which foresees the launch of a rover that will look for signs of past life on Mars.
Gabriela Ligeza, Tomaso R. R. Bontognali, Tomaso R. R. Bontognali, Lucile Fayon, Axel Bouquety, Beda Hofmann, Beda Hofmann, Jean-Luc Josset, Nikolaus J. Kuhn   +8 more
doaj   +1 more source

Microbial biosignature preservation in carbonated serpentine from the Samail Ophiolite, Oman

Communications Earth & Environment, 2022
Detection of material preserved in a mineralized fracture likely indicate microbial remains and dubiofossils and suggests serpentinizing environments can preserve morphological evidence of rock-hosted microbial life, according to analyses of drill core ...
Jon Lima-Zaloumis, Anna Neubeck, Magnus Ivarsson, Maitrayee Bose, Rebecca Greenberger, Alexis S. Templeton, Andrew D. Czaja, Peter B. Kelemen, Tomas Edvinsson   +8 more
doaj   +1 more source

Mars: The Viking discoveries [PDF]

, 1977
An overview of the Viking Mars probe is presented. The Viking spacecraft is described and a brief history of the earlier observations and exploration of Mars is provided.
French, B. M.
core   +2 more sources

Reciprocal control of viral infection and phosphoinositide dynamics

FEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

An anthology of outstanding achievements in science and technology. Part 18: Rocket engineering and near-space exploration

Electrical engineering & Electromechanics, 2014
A brief scientific and historical essay on the history of designing rocket technology and exploring near and outer space around the Earth is given.
M.I. Baranov
doaj  

Brief introduction to the geology of the Ilímaussaq alkaline complex, South Greenland, and its exploration history

, 2001
The Ilímaussaq alkaline complex, the type locality of agpaitic nepheline syenites, is made up of three intrusive phases, (1) augite syenite, (2) alkali acid rocks and (3) agpaitic nepheline syenites which occupy the major part of the complex.
H. Sørensen
semanticscholar   +1 more source

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

Impact of history imprint on firm innovation strategies: The role of ownership type and information sharing

Journal of Innovation & Knowledge
The impact of history and the use of firms’ past in theoretical models examining firm strategies have garnered increasing attention. Whether firms can benefit from their history imprints to facilitate innovation strategies is an increasingly important ...
Min Ju, Gerald Yong Gao
doaj   +1 more source