Results 51 to 60 of about 2,587,577 (305)

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

Nuclear Activity In Isolated Galaxies

, 2013
We present a spectroscopic study of the incidence of AGN nuclear activity in two samples of isolated galaxies (Karachentseva, V.E. & Varela, J.). Our results show that the incidence of non-thermal nuclear activity is about 43% and 31% for galaxies with ...
Abazajian, Alonso, Ascensión del Olmo, Baldwin, Barton, Bertola, Bianchi, Binette, Caon, Cid Fernandes, Coziol, Dahari, Dahari, de Mello, de Mello, Deborah Dultzin, Dultzin, Dultzin-Hacyan, Elitzur, Ellison, Ellison, Francisco J. Hernández-Ibarra, Gu, Gu, Hao, Heckman, Hernandez, Hernández Toledo, Hernández-Toledo, Ho, Ho, Ho, Ho, Ho, Ho, Jaime Perea, Jesús González, Karachentsev, Karachentseva, Karachentseva, Kauffmann, Keel, Keel, Kennicutt, Kennicutt, Kewley, Koulouridis, Koulouridis, Krongold, Krongold, Krongold, Krongold, Laurikainen, Lee, Lin, Lonsdale, Martínez, Miller, Moles, Márquez, Narayan, Nicastro, Pimbblet, Pimbblet, Pérez-González, Rogers, Ruderman, Sabater, Sarzi, Schmitt, Shapovalova, Shapovalova, Sorrentino, Stasińska, Stauffer, Stauffer, Storchi-Bergmann, Sulentic, Tran, Tran, Trouille, Varela, Veilleux, Verdes-Montenegro, Verley, von der Linden, Winkler, Woods, Yair Krongold   +88 more
core   +1 more source

Fine Scale Temperature Fluctuations in the the Orion Nebula and the t^2 Problem [PDF]

, 2003
We present a high spatial resolution map of the columnar electron temperature (Tc) of a region to the south west of the Trapezium in the Orion Nebula.
Antonio Peimbert, Brand P. W. J. L., C. R. O'Dell, Canto J., Esteban C., Hogerheijde M. R., Liu X.-W., Manuel Peimbert, Meaburn J., O’Dell C. R., Peimbert M., Peimbert M., Stasinska G., Van Blerkom D., van der Werf P. P., von Horner S., Wilson T. L.   +16 more
core   +3 more sources

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

Cytotoxic and cell cycle arrest properties of two steroidal alkaloids isolated from Holarrhena floribunda (G. Don) T. Durand & Schinz leaves

BMC Complementary and Alternative Medicine, 2019
Background The plant Holarrhena floribunda (H. floribunda; G. Don) is indigenous to sub-Saharan Africa and is traditionally used to treat several ailments.
J. A. Badmus, O. E. Ekpo, A. A. Hussein, M. Meyer, D. C. Hiss   +4 more
doaj   +1 more source

Homozygous Transgenic Barley (Hordeum vulgare L.) Plants by Anther Culture

Plants, 2020
Production of homozygous lines derived from transgenic plants is one of the important steps for phenotyping and genotyping transgenic progeny. The selection of homozygous plants is a tedious process that can be significantly shortened by androgenesis ...
Ludmila Ohnoutková, Tomáš Vlčko
doaj   +1 more source

Self-protecting solid state isolated switch [PDF]

, 1974
Solid state switch has following capabilities: (1) Hybrid or IC from compatible with direct mounting on solar array substrate; (2) Continuous signal is not required to hold it in either on or off state; (3) Separate signal lines for on and off control; (
Gooder, S. T., Hoffman, A. C.
core   +1 more source

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

Organoids in pediatric cancer research

FEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

The Metastatic Potential and Chemoresistance of Human Pancreatic Cancer Stem Cells. [PDF]

PLoS ONE, 2016
Cancer stem cells (CSCs) typically have the capacity to evade chemotherapy and may be the principal source of metastases. CSCs for human pancreatic ductal carcinoma (PDAC) have been identified, but neither the metastatic potential nor the chemoresistance
Vikash J Bhagwandin, J Michael Bishop, Woodring E Wright, Jerry W Shay   +3 more
doaj   +1 more source