Results 11 to 20 of about 766,195 (336)

Microwave-assisted efficient and facile synthesis of tetramic acid derivatives via a one-pot post-Ugi cascade reaction

open access: yesBeilstein Journal of Organic Chemistry, 2020
A facile microwave-assisted method for the synthesis of tetramic acid derivatives has been developed through an Ugi/Dieckmann cyclization strategy with DBU.
Yong Li   +8 more
doaj   +1 more source

Modulating GABA modulators [PDF]

open access: yesBritish Journal of Pharmacology, 2006
Benzodiazepines produce a broad spectrum of behavioral effects, which may be clinically desirable or undesirable, by positively or negatively modulating the effects of GABA at GABAA receptors. Over the past 20 years, much effort has been devoted towards identifying new compounds with limited undesirable effects.
openaire   +2 more sources

Nanomechanical optical devices fabricated with aligned wafer bonding [PDF]

open access: yes, 1998
This paper reports on a new method for making some types of integrated optical nanomechanical devices. Intensity modulators as well as phase modulators were fabricated using several silicon micromachining techniques, including chemical mechanical ...
Berenschot, J.W.   +6 more
core   +3 more sources

Broadband high-efficiency near-infrared graphene phase modulators enabled by metal–nanoribbon integrated hybrid plasmonic waveguides

open access: yesNanophotonics, 2021
The phase modulator is a key component in optical communications for its phase modulation functions. In this paper, we numerically demonstrate a variety of ultra-compact high-efficiency graphene phase modulators (GPMs) based on metal–nanoribbon ...
Ye Longfang   +5 more
doaj   +1 more source

Wave-Coupled W-Band LiNbO_3 Mach-Zehnder Modulator [PDF]

open access: yes, 1992
Summary form only given. Mach-Zehnder amplitude modulators have been designed for W-band operation (94 GHz), at a 1.3-μm optical wavelength. These modulators use bow-tie antennas, which are relatively insensitive to DC bias connections made to the ends ...
Bridges, William B.   +2 more
core   +1 more source

Silicon optical modulators [PDF]

open access: yes, 2010
Optical technology is poised to revolutionise short reach interconnects. The leading candidate technology is silicon photonics, and the workhorse of such interconnect is the optical modulator.
Gardes, F.Y.   +3 more
core   +1 more source

Oscillatory Modules [PDF]

open access: yesLetters in Mathematical Physics, 2009
Developing the ideas of Bressler and Soibelman and of Karabegov, we introduce a notion of an oscillatory module on a symplectic manifold which is a sheaf of modules over the sheaf of deformation quantization algebras with an additional structure. We compare the category of oscillatory modules on a torus to the Fukaya category as computed by Polishchuk ...
openaire   +3 more sources

Old drugs are new again (drugs) [PDF]

open access: yesSerbian Journal of Anesthesia and Intensive Therapy, 2017
The societal cost of development of new medications is high. The faster and more economical approach is to use already proven pharmacological characteristics of drugs in use for development of new drug formulations.
Jovičić Jelena   +5 more
doaj   +1 more source

Accurate and simple modeling of amplifier dc gain nonlinearity in switched-capacitor circuits [PDF]

open access: yes, 2007
This paper presents an accurate and simple model for dc gain nonlinearity of operational amplifiers used in the switched-capacitor circuits such as the sigma-delta modulators.
Rodríguez Vázquez, Ángel Benito   +1 more
core   +1 more source

The Z-Drugs Zolpidem, Zaleplon, and Eszopiclone Have Varying Actions on Human GABAA Receptors Containing γ1, γ2, and γ3 Subunits

open access: yesFrontiers in Neuroscience, 2020
γ-Aminobutyric-acid type A (GABAA) receptors expressing the γ1 or γ3 subunit are only found within a few regions of the brain, some of which are involved in sleep.
Grant Richter   +3 more
doaj   +1 more source

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