Human, Drosophila melanogaster, and Caenorhabditis elegans cDNA clones encoding homologues of a serine(threonine) protein kinase (EC 2.7.1.37) (designated Ndr protein kinase) have been isolated and sequenced. The human and Drosophila cDNAs predict polypeptides of 54 kDa and 52 kDa, respectively, which share approximately 80% amino acid similarity. Northern analysis of human tissues revealed a u...

A decrease in current with increasing voltage, often referred to as negative differential resistance NDR , has been observed in many electronic devices and can usually be understood within a one-electron picture. However, NDR has recently been reported in nanoscale devices with large single-electron charging energies which require a many-electron picture in Fock space. This paper presents a gen...

The objective of this study was to investigate the prognostic significance of the ambulatory blood pressure (BP) during night and day and of the night-to-day BP ratio (NDR). We studied 7458 participants (mean age 56.8 years; 45.8% women) enrolled in the International Database on Ambulatory BP in relation to Cardiovascular Outcome. Using Cox models, we calculated hazard ratios (HR) adjusted for ...

The conductance-voltage spectrum of molecular nanostructures measured by scanning tunneling spectroscopy (STS) is generally assumed to reflect the local density of states of the molecule. This excludes the possibility of observing negative differential resistance (NDR). We report here the observation of NDR in the scanning tunneling microscope (STM) current-voltage (I-V) characteristics of self...

The mechanically controllable break junction technique is used to study charge transport through suspended DNA molecules. The current-voltage (I-V) characteristics in an aqueous solution display series of negative differential resistance (NDR) and hysteresis behavior. Under high-vacuum conditions, the peak positions of NDR shift to lower voltage, and the amplitude is reduced dramatically. The o...

Recently there is a renewed interest in the development of transistor circuits which emulate the Negative Differential Resistance (NDR) exhibited by different emerging devices like Resonant Tunneling Diodes (RTDs). These MOS-NDR circuits easily allow the prototyping of design concepts and techniques developed for such NDR devices. The importation of those concepts into transistor technologies c...

Negative differential resistance (NDR) peaks in the current-voltage characteristics of ferrocenylundecanethiol self-assembled monolayers are not reversible. The peaks turn to smoothly increasing currents as oxygen is removed from the system, indicating that NDR arises from the reaction of an energetic charged species with ambient oxygen.

In the interpretation of scanning tunneling spectroscopy (STS) data on molecular nanostructures the tunneling conductance is often assumed to be proportional to the local density of states of the molecule. This precludes the possibility of observing negative diierential resistance (NDR). We report here the observation of NDR in the current-voltage (I-V) characteristics of a self-assembled monol...

Al(Ga)N/GaN resonant tunneling diodes (RTDs) are grown by metal-organic chemical vapor deposition. The effects of material quality on room temperature negative differential resistance (NDR) behaviour of RTDs are investigated by growing the RTD structure on AlN, GaN, and lateral epitaxial overgrowth GaN templates. This reveals that NDR characteristics of RTDs are very sensitive to material quali...

Abstract Negative differential resistance (NDR) with multi‐level resistive switching has been investigated for realizing memory devices. However, achieving a high peak‐to‐valley ratio of NDR is formidable challenge reliable switch. Here, new type light‐enhanced device accompanied based on glutamine‐functionalized MoS 2 quantum dots demonstrated. By increasing the illuminated light power device,...