Results 251 to 260 of about 3,923,216 (303)

Signaling complexes for postsynaptic differentiation

Journal of Neurocytology, 2003
The receptor tyrosine kinase MuSK is activated by agrin, an extracellular matrix protein believed to be utilized by motoneurons to regulate the formation or maintenance of the neuromuscular junction (NMJ). Recent studies have shed light on intracellular signaling mechanisms downstream of MuSK.
Zhenge, Luo, Qiang, Wang, G Clement, Dobbins, Shoshanah, Levy, Wen C, Xiong, Lin, Mei   +5 more
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Endocannabinoid signaling and epidermal differentiation

European Journal of Dermatology, 2011
Endocannabinoids represent a class of endogenous lipid mediators, that are involved in various biological processes, both centrally and peripherally. The prototype member of this group of compounds, anandamide, regulates cell growth, differentiation and death; this holds true also in the skin, that is the largest organ of the body constantly exposed to
Pucci M, Pirazzi V, Pasquariello N, Maccarrone M   +3 more
openaire   +3 more sources

FIR differentiators for quantized signals

IEEE Transactions on Signal Processing, 2001
The impact of quantization noise on a signal whose rate is to be estimated using a FIR differentiator is analyzed, concentrating on the important constant-rate case in order that the filter be optimized for systems with low-frequency rates of change.
openaire   +1 more source

Wnt Signaling and Cardiac Differentiation

2012
The Wnt family of secreted glycoproteins participates in a wide array of biological processes, including cellular differentiation, proliferation, survival, apoptosis, adhesion, angiogenesis, hypertrophy, and aging. The canonical Wnt signaling primarily utilizes β-catenin-mediated activation of transcription, while the noncanonical mechanisms involve a ...
Michael P, Flaherty, Timothy J, Kamerzell, Buddhadeb, Dawn   +2 more
openaire   +2 more sources

Generalized Differential Vector Signaling

2009 IEEE International Conference on Communications, 2009
Binary NRZ signaling over single ended or fully differential parallel wired channels is commonly used for chip-to-chip communications. This paper presents differential vector signaling as a generalized new class of signaling for parallel wired links.
openaire   +2 more sources

A Technique for Multiple Signal Differentiation

Computational Mathematics and Modeling, 2001
The construction of differentiators is reduced to the design of a state observer for a dynamical system with an unknown bounded input. The author considers differentiators which ensure asymptotically exact multiple differentiation of signals from a given class.
openaire   +1 more source

A Differentiator for Low-Frequency Signals

IEEE Transactions on Biomedical Engineering, 1978
An electronic differentiator specifically for low-frequency signals is described. The difference between a signal and its staircase approximation is computed; the peaks of this function approximate the time derivative of the input signal. By regulating the width of the steps in the staircase function, very slow signals can be differentiated.
openaire   +2 more sources

Differential effects of methylphenidate on signalled and non-signalled reinforcement

Pharmacology Biochemistry and Behavior, 1980
Rats were trained to press a bar with water reinforcement under a variable interval 15-sec (VI 15), variable interval 15-sec signalled-reinforcement (VI SD), or a differential-reinforcement-of-low-rate 10-sec (DRL 10) schedule. Methylphenidate (MP) had little effect on response rates or reinforcements-earned in the VI 15 group.
M W, Emmett-Oglesby, K E, Taylor, R E, Dafter   +2 more
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Differential PCM for Speech and Data Signals

IEEE Transactions on Communications, 1972
The performance of differential PCM encoders used for both speech and data signals is investigated. Primarily concerned with data signals, this paper shows how differential PCM systems designed for speech perform with differential-phase-modulation, single sideband and partial response data signals operating at data rates of 1200-9600 bits/s.
John Ben O'Neal Jr., Raymond W. Stroh
openaire   +1 more source

Signal transduction pathways in neuronal differentiation

Current Opinion in Neurobiology, 1993
New insights into the signal transduction pathways for neuronal growth factors and cell adhesion molecules are affording us a better understanding of the intracellular mechanisms for neuronal differentiation, and of the ways in which the various signals are integrated during this process.
K, Keegan, S, Halegoua
openaire   +2 more sources