From millimeter and optical observations of the Jupiter-family comet 17P/Holmes performed soon after its huge outburst of October 24, 2007, we derive 14N/15N=139±26 in HCN, and 14N/15N=165±40 in CN, establishing that HCN has the same non-terrestrial isotopic composition as CN. The same conclusion is obtained for the long-period comet C/1995 O1 (Hale-Bopp) after a reanalysis of previously publis...

Information processing in the hippocampus critically relies on its reciprocal interaction with the medial septum (MS). Synchronization of the septo-hippocampal system was demonstrated during both major hippocampal activity states, the regular theta rhythm and the large amplitude irregular activity. Previous experimental and modeling data suggest that the MS provides rhythmic drive to the hippoc...

Cloud storage system such as Amazon’s Dynamo and Google’s GFS poses new challenges to the community to support efficient query processing for various applications. In this paper we propose RT-HCN, a distributed indexing scheme for multi-dimensional query processing in data centers, the infrastructure to build cloud systems. RT-HCN is a two-layer indexing scheme, which integrates HCN-based routi...

BACKGROUND There has been a worldwide concern for the health risks of cigarette smoking and hydrogen cyanide (HCN) considered as one of the hazardous tobacco compounds which is needed to be determined in order to reduce the dose related to smoke disease risk. In this study, we prepare the experimental procedure to entrap the HCN from mainstream smoke of different brands of Tehran cigarette, thr...

We analysed clinical data in 80 genetically confirmed Huntington?s disease (HD) patients and measured the severity of the head of the caudate nucleus (HCN) atrophy using computed tomography-guided planimetry. The results were compared with measurements obtained in 43 age-matched healthy subjects. Mean planimetric measurements of the HCN differed significantly between the HD patients and healthy...

Ion channels operate in intact tissues as part of large macromolecular complexes that can include cytoskeletal proteins, scaffolding proteins, signaling molecules, and a litany of other molecules. The proteins that make up these complexes can influence the trafficking, localization, and biophysical properties of the channel. TRIP8b (tetratricopetide repeat-containing Rab8b-interacting protein) ...

We introduce the hierarchical compositional network (HCN), a directed generative model able to discover and disentangle, without supervision, the building blocks of a set of binary images. The building blocks are binary features defined hierarchically as a composition of some of the features in the layer immediately below, arranged in a particular manner. At a high level, HCN is similar to a si...

AIMS The hyperpolarization-activated cyclic nucleotide-gated (HCN) current I(f)/I(HCN) is generally thought to be carried by Na(+) and K(+) under physiological conditions. Recently, Ca(2+) influx through HCN channels has indirectly been postulated. However, direct functional evidence of Ca(2+) permeation through I(f)/I(HCN) is still lacking. METHODS AND RESULTS To possibly provide direct evid...

In this issue of Neuron, Santello and Nevian (2015) report HCN channel plasticity and increased temporal summation in layer 5 ACC neurons following nerve injury. They are able to restore HCN channel function and reduce behavioral hypersensitivity with selective serotonin receptor targeting.

In previous reports (1, 2) there was presented evidence which could not be fitted into the widely accepted oxidation-reduction theory of papain activation (3). In these experiments it was shown that papain may be inhibited by means of phenylhydrazine and may be reactivated by means of benzaldehyde. In an attempt to study further the process of papain activation, an inactive papain preparation (...