Results 61 to 70 of about 92,071 (290)

A dc to dc converter [PDF]

, 1984
The object of the invention is to provide an improved converter for converting one direct current voltage to another. A plurality of phased square wave voltages are provided from a ring counter through amplifiers to a like plurality of output ...
Garrett, H., Gould, J. M., Matheney, J. L., Willis, A. E.   +3 more
core   +1 more source

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

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

Torque Ripple Reduction in Modular Drive of a Non-Sinusoidal, Asymmetric Six-Phase, Permanent Magnet Synchronous Motor with Double Stator Windings using Harmonic Current Injection Strategy [PDF]

International Journal of Industrial Electronics, Control and Optimization
Multiphase permanent magnet synchronous motors (PMSMs) are widely adopted in high-power-density and high-efficiency applications, particularly where reliability is a critical design requirement.
Davood Maleki, Abolfazl Halvaei Niasar
doaj   +1 more source

Static inverters which sum a plurality of waves Patent [PDF]

, 1970
Describing static inverter with single or multiple phase ...
Anderson, D. L., Gould, J. M., Willis, A. E., Winkler, C. E.   +3 more
core   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

A simple overlap angle control strategy for reducing commutation torque ripple in a brushless DC motor drive

Engineering Science and Technology, an International Journal, 2017
A commutation torque ripple is generated in a brushless DC motor due to a finite time taken for current transfer between outgoing phase and incoming phase due to the phase inductance.
Chetan K. Lad, R Chudamani
doaj   +1 more source

Parameter Estimation of Asymmetrical Six-phase Induction Machines using Modified Standard Tests [PDF]

In multiphase machine drives, accuracy of the estimated machine parameters is crucial for effective performance prediction and/or control. While a great amount of work has been done on parameter estimation for three-phase machines, corresponding ...
Abdel-Khalik, AS, Che, HS, Dordevic, O, Levi, E   +3 more
core   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Controller for computer control of brushless dc motors [PDF]

, 1981
A motor speed and torque controller for brushless d.c. motors provides an unusually smooth torque control arrangement. The controller provides a means for controlling a current waveform in each winding of a brushless dc motor by synchronization of an ...
Hieda, L. S.
core   +1 more source