Results 251 to 260 of about 2,473 (319)

Cryo‐EM of Rationally Designed Photosystem I Nanoassembly on Graphene Validates Orientation‐Driven Enhancement of Photocatalytic Performance

open access: yesAdvanced Functional Materials, EarlyView.
The first cryo‐EM visualization and quantification of oriented Photosystem I (PSI) on single‐layer graphene is reported. Domain‐specific covalent anchoring of PSI, with the reducing side of the biophotocatalyst toward graphene, promotes three‐fold higher anodic photocurrent generation compared to a randomly physisorbed counterpart. This approach allows
Miriam Izzo   +6 more
wiley   +1 more source

CRISPR/Cas9‐Assisted Microrobots for Fast and Ultrasensitive “On‐The‐Fly” Next‐Generation DNA Detection

open access: yesAdvanced Functional Materials, EarlyView.
This work presents self‐propelled CRISPR/Cas9‐functionalized Au–MRs for rapid, amplification‐free, “on‐the‐fly” DNA detection. By harnessing motion‐assisted signal recovery, the platform achieved the limit of detection in low fM DNA concentrations, enabling detection across a wide dynamic range within only 5 min, which is significantly faster than any ...
Jyoti   +3 more
wiley   +1 more source

New power convertor technique employing power transistors

Proceedings of the Institution of Electrical Engineers, 1978
A new power convertor, using power transistors in a switching mode as the main power elements, has been introduced. This convertor is capable of conversion from a fixed 3-phase source to variable frequency, controlled output current, such that the operating frequency range is not limited by the supply frequency.
A.R. Daniels, D.T. Slattery
openaire   +1 more source

Auxiliary power convertors for locomotives

1980 IEEE Power Electronics Specialists Conference, 1980
The use of squirrel cage motor for auxiliary loads in railroad applications makes it necessary to have a conversion system aboard the locomotive or the train. This system has to convert a 1-phase ac or a dc voltage into a 3-phase 50 or 60 Hz voltage. This paper presents solutions built on power electronics.
Kjell Frank, Kjell Rehnman
openaire   +1 more source

Active filters for static power convertors

IEE Proceedings B Electric Power Applications, 1983
The need for output filters with static power convertors is well known. The paper presents a different way of solving the problem. A new configuration is therefore proposed, which includes both active and passive components. The advantages of this system are, among others, that it can be used for both AC and DC convertors, especially where very low ...
J. Uceda, F. Aldana, P. Martinez
openaire   +1 more source

Ramptime current control [for power convertors]

Proceedings of Applied Power Electronics Conference. APEC '96, 2002
Ramptime current control is a new robust technique for directly controlling the inductor current in switched power converters. It is largely invariant with respect to circuit parameters and system voltages. Ramptime is a sliding mode method producing zero average current error (ZACE) in each switching period with a controlled switching frequency band ...
L.J. Borle, C.V. Nayar
openaire   +1 more source

Application of power transistors to polyphase regenerative power convertors

Proceedings of the Institution of Electrical Engineers, 1978
An important mode of operation of a general power amplifier using power transistors is described, whose output is a variable-frequency 3-phase current. The convertor operates from a fixed 3-phase source without a d.c. link, utilises only 18 power transistors and provides a regenerative output.
A.R. Daniels, D.T. Slattery
openaire   +1 more source

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