Results 71 to 80 of about 49,683 (297)

Determination of the Experimental Minimal Formula of Metal‐Organic Frameworks

Advanced Science, EarlyView.
We present a simple yet rigorous method to determine the precise chemical composition of metal‐organic frameworks using Nuclear Magnetic Resonance (NMR), Thermogravimetric Analaysis (TGA), and ultraviolet‐visible (UV‐vis) spectroscopy. This approach reveals overlooked inorganic ligands and provides accurate experimental molar masses, enhancing ...
Jikson Pulparayil Mathew, Charlotte Simms, David E. Salazar Marcano, Evert Dhaene, Tatjana N. Parac‐Vogt, Jonathan De Roo   +5 more
wiley   +1 more source

Classification of Metal-Deficient Dwarfs in the Vilnius Photometric System

Open Astronomy, 2003
Methods used for the quantitative classification of metal-deficient stars in the Vilnius photometric system are reviewed. We present a new calibration of absolute magnitudes for dwarfs and subdwarfs, based on Hipparcos parallaxes.
Lazauskaitė R., Bartkevičius A., Bartašiūtė S.   +2 more
doaj   +1 more source

An Amygdala‐hippocampus Circuit for Endocannabinoid Modulation of Anxiety Avoidance

Advanced Science, EarlyView.
This study employs three synapse‐specific endocannabinoids (eCB) probes to monitor dynamic eCB release, activate CB1Rs and knockdown 2‐AG biosynthesis enzymes in glutamatergic anterior basolateral amygdala ‐ ventral hippocampus (aBLA–vHPC) circuit. At aBLA–vHPC circuits, activation of CB1Rs reduce anxiety avoidance, and knockdown of eCB biosynthesis ...
Bao Xue, Mao‐Xing Zhang, Xiao‐Chen Bi, Shou‐Peng Lai, Xin‐Tian Bie, Yuan Dong, Jian‐Feng Li, Fang Gao, Xia Zhang, Ying Wang   +9 more
wiley   +1 more source

Symbiotic Nova PU Vul - 33 Years of Observations

Open Astronomy, 2012
We present UBVRI light curves of the symbiotic nova PU Vul after its outburst in 1978. Three observed eclipses of the hot component by the cool one were used to determine the ephemeris of the binary system as JD (Min I) = 2444550(15) + 4897(10) × E days.
Shugarov S., Chochol D., Kolotilov E.
doaj   +1 more source

Transparent Ceramic@Sapphire Composites for High‐Power Laser‐Driven Lighting

Advanced Science, EarlyView.
This work introduces an innovative strategy for high‐power laser lighting by integrating a phosphor ceramic layer with a high‐thermal‐conductivity sapphire substrate through a simple high‐temperature sintering process. This approach enhances luminous flux (152–319%) and increases the luminescence saturation threshold (100–233%), making it versatile ...
Guoyu Xi, Shisheng Lin, Tongjie Shen, Tao Pang, Zikang Yu, Yang Peng, Lingwei Zeng, Yuxiang Ke, Zhehong Zhou, Ronghua Chen, Feng Huang, Daqin Chen   +11 more
wiley   +1 more source

Ultraviolet Passbands for a Space Multicolor Photometric System

Open Astronomy, 2003
The results of search for the optimal location of ultraviolet passbands for an extra-atmospheric photometric system are given. The addition of passbands near the well-known extinction bump at 218 nm to the photometric system makes it possible to ...
Ambartsoumian A. R., Mironov A. V., Zakharov A. I.   +2 more
doaj   +1 more source

Chemical Pressure‐Induced FWHM Narrowing in Narrowband Green Phosphors for Laser Displays with Ultra‐High Saturation Thresholds

Advanced Science, EarlyView.
Spectral tailoring is achieved in the phosphor Na0.6Rb0.4BaB9O15 (NRBBO): Eu2+ using chemical pressure. The gradual decrease of FWHM under chemical pressure of Rb+ ions. WLED based on NRBBO: 0.11Eu2+ have a color gamut of 106% NTSC. The excellent laser excitation properties of NRBBO: 0.11Eu2+ give it great potential as a green phosphor for laser ...
Runtian Kang, Zhezhe Su, Chunxu Bao, Yuhua Wang   +3 more
wiley   +1 more source

Interstellar Extinction in the Direction of The Barnard 1 Dark Cloud in Perseus

Open Astronomy, 2003
Spectral and luminosity classes, absolute magnitudes, color excesses, interstellar extinctions and distances are determined for 98 stars down to 18 mag in the Barnard 1 dark cloud belonging to the Per OB2 association. The classification of stars is based
Černis K., Straižys V.
doaj   +1 more source

A Novel Class of Multi‐substituted Diaryl Scaffold Derivatives Inhibit Glioblastoma Progression by Targeting CD155

Advanced Science, EarlyView.
Structural modification of clofoctol yielded a novel blood‐brain barrier‐permeable compound, B7, featuring a multi‐substituted diaryl scaffold. B7 demonstrates potent anti‐glioblastoma activity by suppressing glioblastoma stem cells proliferation, migration, and invasion through interactions with five key residues of poliovirus receptor cell adhesion ...
Yong‐jian Wang, Ting Sun, Si‐tu Xue, Zhong‐di Cai, Hong Yi, Miao Lv, Shi‐bo Kou, Rui Liu, Xiao‐zhong Peng, Zhuo‐rong Li   +9 more
wiley   +1 more source

Color Photometric Stereo Using Multi-Band Camera Constrained by Median Filter and Occluding Boundary

Journal of Imaging, 2019
One of the main problems faced by the photometric stereo method is that several measurements are required, as this method needs illumination from light sources from different directions.
Daisuke Miyazaki, Yuka Onishi, Shinsaku Hiura   +2 more
doaj   +1 more source