Results 91 to 100 of about 2,331,313 (323)

Fast tuneable InGaAsP DBR laser using quantum-confined stark-effect-induced refractive index change [PDF]

, 2007
We report a monolithically integrated InGaAsP DBR ridge waveguide laser that uses the quantum-confined Stark effect (QCSE) to achieve fast tuning response.
Cannard, P, Gwilliam, R, Pantouvaki, M, Renaud, CC, Robertson, MJ, Seeds, AJ   +5 more
core   +1 more source

An upstream open reading frame regulates expression of the mitochondrial protein Slm35 and mitophagy flux

FEBS Letters, EarlyView.
This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva, Ariann E. Mendoza‐Martínez, P. Abril Medina‐Flores, Carlos Campero‐Basaldua, Alexander DeLuna, Soledad Funes   +5 more
wiley   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

No Go Theorem for Self Tuning Solutions With Gauss-Bonnet Terms

, 2002
We consider self tuning solutions for a brane embedded in an anti de Sitter spacetime. We include the higher derivative Gauss-Bonnet terms in the action and study singularity free solutions with finite effective Newton's constant.
C. Charmousis, C. Gomez, E. D'Hoker, E. Verlinde, G.N. Felder, I.P. Neupane, I.P. Neupane, Rajesh Venkatachalapathy, S. Kalyana Rama, S.P. de Alwis, S.S. Gubser, Samik Dasgupta   +11 more
core   +4 more sources

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

Frequency tuning loop for VCOs [PDF]

, 1991
A frequency tuning circuit is introduced for VCOs (voltage-controlled oscillators) so that the final relationship between oscillating frequency and input control voltage is fixed and independent of nonidealities.
Huertas Díaz, José Luis, Linares Barranco, Bernabé, Rodríguez Vázquez, Ángel Benito, Sánchez Sinencio, Edgar   +3 more
core   +1 more source

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Tunable IDC Phase Shifter Based on Semiautomated Deposition of Graphene

IET Microwaves, Antennas & Propagation
In this work, a graphene‐based tunable phase shifter is proposed which deploys a semiautomated procedure for graphene deposition leading to a high‐quality graphene transfer.
Warda Saeed, Muhammad Yasir
doaj   +1 more source

Nontrival Cosmological Constant in Brane Worlds with Unorthodox Lagrangians

, 2011
In self-tuning brane-world models with extra dimensions, large contributions to the cosmological constant are absorbed into the curvature of extra dimensions and consistent with flat 4d geometry.
A.J.M. Medved, C.P. Burgess, E. Witten, Hans Peter Nilles, I. Antoniadis, I. Antoniadis, I. Navarro, Ivonne Zavala, J. Garriga, J.-W. Chen, J.E. Kim, J.E. Kim, K.-S. Choi, R. Contino, S. Förste, S.M. Carroll, Stefan Förste, U. Ellwanger, Y. Aghababaie .   +18 more
core   +1 more source

On the Selection of Tuning Methodology of FOPID Controllers for the Control of Higher Order Processes [PDF]

, 2012
In this paper, a comparative study is done on the time and frequency domain tuning strategies for fractional order (FO) PID controllers to handle higher order processes. A new fractional order template for reduced parameter modeling of stable minimum/non-
Alomoush, Amitava Gupta, Astrom, Astrom, Astrom, Bettou, Bhambhani, Biswas, Biswas, Bohannan, Bouafoura, Cao, Caponetto, Caponetto, Castillo, Chao, Charef, Chen, Chen, Das, Dorcak, Dwyer, Hamamci, Hamamci, Ho, Isaksson, Lanusse, Lee, Li, Luo, Luo, Malwatkar, Martin, Merrikh-Bayat, Monje, Monje, Nelder, Oustaloup, Oustaloup, Oustaloup, Padula, Panagopoulos, Petras, Podlubny, Podlubny, Saha, Saha, Saleh Tavazoei, Santamaria, Saptarshi Das, Seborg, Shantanu Das, Shen, Suman Saha, Valerio, Zamani, Zhuang   +56 more
core   +2 more sources