Results 151 to 160 of about 482,777 (285)

Benjamín Thomson, Count Rumford

Revista CENIC Ciencias Químicas, 2016
Benjamin Thomson, Count Rumford (1752-1814), was a self-educated scientist, military man, and political economist, living during the turbulent period of the American Revolution and the European Wars of the 18th and 19th centuries. He carried on important
Jaime Wisniak
doaj  

Optical photometry of Sco X-2

Astronomy & Astrophysics, 1997
We present optical photometry of the galactic bulge low-mass X-ray binary GX 349+2 (Sco X-2) obtained in July 1993 and March 1996. Short-term variations up to one magnitude are present on time scales of a few hours, which are related to the known X-ray behaviour of the source.
Barziv, O., Kuulkers, E., Méndez, R.M., van der Hooft, F., Groot, P.J., van der Klis, M., Kemper, C., van Paradijs, J.A.   +7 more
openaire   +2 more sources

Photo‐Biomodulation of the Hippocampus Using Near‐Infrared Laser to Enhance Cognitive Function in Mice

Advanced Science, Volume 12, Issue 22, June 12, 2025.
Here a transcranial photo‐biomodulation approach is developed using near‐infrared (NIR) laser on hippocampus of mice, revealing significant improvements in learning and memory ability of mice under normal and disease conditions. The improvement results from the high‐density cell‐induced NIR local energy deposition, neuronal activation, and axonogenesis
Wei‐Tong Pan, Han‐Wen Gu, Yan‐Bo Zhou, Sophie Ma, Daqing Ma, Pan‐Miao Liu, Jian‐Jun Yang   +6 more
wiley   +1 more source

Discovery of two L & T binaries with wide separations and peculiar photometric properties

, 2011
We present spatially resolved photometric and spectroscopic observations of two wide brown dwarf binaries uncovered by the SIMP near-infrared proper motion survey.
Allen, Allers, Artigau, Artigau, Boss, Bowler, Bowler, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burningham, Burrows, Burrows, Chiu, Damien Gratadour, David Lafrenière, Dupuy, Duquennoy, Geballe, Ghez, Jayawardhana, Jonathan Gagné, Kasper, Knapp, Konopacky, Konopacky, Lison Malo, Liu, Liu, Liu, Liu, Liu, Looper, Loïc Albert, Marley, Marley, Maxted, McElwain, McGovern, McLean, Metchev, Metchev, Michael Liu, Mohanty, Monet, Padoan, Padoan, Pravdo, Racine, Reid, Reiners, Reipurth, René Doyon, Salim, Schmidt, Scholz, Skrutskie, Stephens, Trent J. Dupuy, Zacharias, Étienne Artigau   +62 more
core   +2 more sources

Optical and infrared surface photometry of NGC 3077

The Astrophysical Journal, 1989
Photoelectric U, B, and V, photovoltaic K, and four-filter CCD surface photometry of the small, M81-linked Irr II galaxy NGC 3077 are reported. The observations are compared with data from previous studies, and the mass, density, and optical depth ratios are determined for a prominent dust cloud near the center of the galaxy.
Jill S. Price, Craig A. Gullixson
openaire   +2 more sources

Nutritional Potential and Protective Effects of Colocassia esculenta Flowers Against 2,4‐Dinitrophenyl Hydrazine (DNPH) Induced Anemia Wistar Strain Rats

Food Science &Nutrition, Volume 13, Issue 6, June 2025.
The nutritional properties of C. esculenta have been demonstrated. Consumption of C. esculenta reduces anemic disorder in Wistar rats. C. esclenta harvested in Dschang has the best anti‐anemic potential. ABSTRACT This study aimed to assess the nutritional value and effect of Colocasia esculenta flowers on induced anemia in Wistar rats.
Josée Rebecca Nombo, Armel Junior Mbock, Jules Christophe Koule Manz, Tene Stephano Tambo, Misse Jethro Roland Ngangue Ekwalla, Valery Jean François Nsoga, Mathieu Ndomou   +6 more
wiley   +1 more source

Improving Optical Photo-z Estimates Using Submillimeter Photometry [PDF]

arXiv
Estimating the redshifts of distant galaxies is critical for determining their intrinsic properties, as well as for using them as cosmological probes. Measuring redshifts spectroscopically is accurate, but expensive in terms of telescope time, hence it has become common to measure `photometric' redshifts, which are fits to photometry taken in a number ...
arxiv  

First fringes with an integrated-optics beam combiner at 10 um - A new step towards instrument miniaturization for mid-infrared interferometry

, 2011
Observations at mas-resolution scales and high dynamic range hold a central place in achieving, for instance, the spectroscopic characterization of exo-Earths or the detailed mapping of their protoplanetary disc birthplace.
Anheier, Norman C., Arezki, Brahim, Bernacki, Bruce, Kern, Pierre, Labadie, Lucas, Martin, Guillermo, Qiao, H. A.   +6 more
core   +2 more sources

Lysine acetylation modulates s‐OPA1 GTPase activity and oligomerization in mitochondrial membrane remodeling

Protein Science, Volume 34, Issue 6, June 2025.
Abstract Mitochondrial dynamics are regulated by coordinated fission and fusion events that rely on key proteins and lipids organized spatially within the mitochondria. The dynamin‐related GTPase Optic Atrophy 1 (OPA1) is essential for inner mitochondrial membrane fusion and cristae structure maintenance.
Javaid Jabbar, Bakht Afroze, Naomi X. Y. Ling, Jonathan S. Oakhill, Isabelle Rouiller   +4 more
wiley   +1 more source

The Oxytocin Neurons in the Paraventricular Nucleus Are Essential for Chronic Sleep Deprivation‐Mediated Anxiety‐Related Behaviors

CNS Neuroscience &Therapeutics, Volume 31, Issue 6, June 2025.
Chronic sleep deprivation (cSD) promoted anxiety‐related behaviors mainly through inhibiting AMPAR‐mediated postsynaptic excitability of PVNOXT neurons. LTF simulation of PVNOXT neurons could increase anxiety‐like behaviors by inhibiting the PVNOXT‐mPFC pathway. PVNOXT‐mediated inhibitory transmission of the mPFC was enhanced by HSF following cSD.
Yuxin Wang, Yifei Zhang, Yanchao Liu, Zhendong Xu, Jiyan Zhang, Like Wang, Yufeng Cang, Junbin Xin, Fuyu Han, Zhouhua Li, Chuanwei Hu, Xiangjie Kong, Yuchen Deng, Li Zhang, Hairong Wang, Haibo Xu, Ming Chen, Linlin Bi   +17 more
wiley   +1 more source