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The Use of Geomorphic Features The channels are also deepened to allow water to flow freely from drainage pipe outlets and to promote runoff near the channel. Channels that are over-deepened encourage bank erosion, as cross-channel movements tend to be reinforced (Brookes and Sear 1996). One potential obstacle is the necessity for a wider drainage channel, and the subsequent loss of agricultural land to accommodate channel migration within the second-stage channel. www.ag.ohio-state.edu /~agwatmgt/res_geomorphic.htm   (1216 words)

Alter Channel - Wikipedia, the free encyclopedia This channel is similar to the WB network and Kids WB along with 4Kids TV (formerly the Fox Box) in the International market based in the United States. Alter with capital letters was part of the logo shown at the bottom. The channel launched in August 2005 in the U.S. on Dish Network and in December 2005 in Australia on UBI World. en.wikipedia.org /wiki/Alter_Channel   (1059 words)

Channel cytoplasmic loops alter voltage-dependent sodium channel activation in an isoform-specific manner -- Bennett ... Channel cytoplasmic loops alter voltage-dependent sodium channel activation in an isoform-specific manner Functional studies of this inclusive set of chimeras indicate that the first two cytoplasmic loops of the cardiac sodium channel that join domain I to II (loop A), and domain II to III (loop B), are both necessary, and together are sufficient to produce a papain-induced hyperpolarising shift in the voltage at which channels activate. These data are the first to indicate isoform-specific cytoplasmic regions of the voltage-gated sodium channel that directly and differently alter the voltage of channel activation. jp.physoc.org /cgi/content/abstract/535/2/371   (565 words)

Channel cytoplasmic loops alter voltage-dependent sodium channel activation in an isoform-specific manner -- Bennett ... Channel inactivation is altered through mutation, resulting in a small percentage of channels residing in the active state longer than the wild-type channel. Functional comparison of hH1/hSkM1 chimeras indicates that the first two cytoplasmic loops of the cardiac sodium channel joining domain I to II (loop A) and domain II to III (loop B), are both necessary and together sufficient to produce a significant papain-induced, hyperpolarising shift in the voltage at which the cardiac channel activates. The data from each graph compare steady state channel activation at 5 min and following saturation of the papain effect for a single population of cells, and show that the replacement of these three loops is sufficient to produce a papain-induced hyperpolarising shift in activation voltage. jp.physoc.org /cgi/content/full/535/2/371   (5952 words)

Weill Cornell Research The research in the laboratory is focused on the molecular mechanisms governing the function of membrane-spanning ion permeable channels. These questions are addressed using a combination of electrophysiological studies on ion channel function (and structure) and spectroscopic studies of channel structure, in conjunction with theoretical/computational studies on channel folding, ion permeation, and channel-bilayer interactions. The knowledge thus acquired is used to explore how alterations in membrane lipid composition, such as those that occur during a coronary occlusion, affect the gating of gramicidin channels as well as voltage-dependent ion channels formed by integral membrane proteins. www.med.cornell.edu /research/osandersen   (238 words)

Brain glucose sensing and body energy homeostasis: role in obesity and diabetes -- Levin et al. 276 (5): 1223 -- AJP - ...   (Site not responding. Last check: 2007-10-31) Channel is composed of a low-affinity sulfonylurea receptor (SUR2) and Kir6.2 pore-forming unit. channel on GR neurons is inactivated by an increased Altered expression of hypothalamic neuropeptide mRNAs in food-restricted and food-deprived rats. ajpregu.physiology.org /cgi/content/full/276/5/R1223   (5322 words)

Cardiovascular Research Institute This richness in potassium channel variety was one of the factors that stemmed early attempts for biochemical purification of potassium channels. To study potassium channels, we have chosen a molecular approach that isolates individual potassium channel genes so that the channels they give rise to can be studied one at a time and then compared with potassium channels in native tissues. Potassium channel mutations cause diseases of the brain (epilepsy, episodic ataxia), ear (deafness), heart (arrhythmia), muscle (myokymia, periodic paralysis), kidney (hypertension), pancreas (hyperinsulinemic hypoglycemia, neonatal diabetes), and developmental abnormalities of neural crest-derived tissues (Andersen's syndrome). www.cvri.ucsf.edu /Scientist/GroupChannels.shtml   (1174 words)

Programming -- Channels   (Site not responding. Last check: 2007-10-31) Description: Alter Globe, a Greek-language channel, is one of Greece's premiere and exciting 24-hour Hellenic general entertainment channels. Alter Globe offers a wide range of entertainment including fashion, sports, news and cultural programming aimed at a young target audience. Alter Globe offers Greek Americans the best in Greek family entertainment, featuring a line-up of shows like "Mitsi-Chosta Show" and "The Gates of Inexplicable" that have made the Alter Globe name synonymous with quality programming. commercial.dishnetwork.com /content/channels/index.asp?NetwID=51788   (74 words)

Gating Induces a Conformational Change in the Outer Vestibule of ENaC -- Snyder et al. 116 (6): 781 -- The Journal of ...   (Site not responding. Last check: 2007-10-31) Accessibility of the DEG residue to modification could be altered by an extracellular gate (top) or by movement of the DEG residue relative to the conduction pathway (bottom). Snyder, P.M. Liddle's syndrome mutations disrupt cAMP-mediated translocation of the epithelial Na channel to the cell surface. Snyder, P.M., Cheng, C., Prince, L.S., Rogers, J.C., and Welsh, M.J. Electrophysiological and biochemical evidence that DEG/ENaC cation channels are composed of nine subunits. www.jgp.org /cgi/content/full/116/6/781   (4929 words)

HERG K+ Channel Activity Is Regulated by Changes in Phosphatidyl Inositol 4,5-Bisphosphate -- Bian et al. 89 (12): 1168 ... Because the inactivation of HERG channels is released Activated channels are released from activation as in A after which the membrane potential is returned to various potentials and rates of onset of inactivation are taken from the relaxation of the tail currents. channel in thick ascending limb of rat kidney. circres.ahajournals.org /cgi/content/full/89/12/1168   (4580 words)

Redox states of type 1 ryanodine receptor alter Ca2+ release channel response to modulators -- Oba et al. 282 (4): C684 ... Note that the channel activity became apparently independent of Ca in the presence of 50 µM DTT. channels appeared to be similar, although the latter channels were inhibited less at high Ca concentrations. DTT inhibited channel activity in a dose-dependent manner (Fig. ajpcell.physiology.org /cgi/content/full/282/4/C684   (4658 words)

Activation of Protein Kinase A Modulates Trafficking of the Human Cardiac Sodium Channel in Xenopus Oocytes -- Zhou et ... in native myocytes and the recombinant hH1 channel. alter trafficking of membrane transporters and ion channels, CFTR channel insertion to the apical surface in rat duodenal villus epithelial cells is upregulated by VIP in vivo. circres.ahajournals.org /cgi/content/full/87/1/33   (3590 words)

Mechanisms of delta -Hexachlorocyclohexane Toxicity: I. Relationship Between Altered Ventricular Myocyte Contractility ... Cardiac Ca release channels were incorporated into the planar lipid bilayer as described in Experimental Procedures, and current records acquired in the presence of a 500:100 mM CsCl ratio (cis/trans). Traces are representative of channel transitions in the presence of 50 µM Ca (Control), show the same channel after exposure to 50 µM dantrolene (Dantrolene), and show that the addition of 50 µM Chu A, Diaz-Munoz M, Hawkes MJ, Brush K and Hamilton SL (1990) Ryanodine as a probe for the functional state of the skeletal muscle sarcoplasmic reticulum calcium release channel. jpet.aspetjournals.org /cgi/content/full/289/1/477   (5132 words)

Mutations in the channel domain alter desensitization of a neuronal nicotinic receptor   (Site not responding. Last check: 2007-10-31) A VARIETY of ligand-gated ion channels undergo a fast activation process after the rapid application of agonist and also a slower transition towards desensitized or inactivated closed channel states when exposure to agonist is prolonged But, unexpectedly, the same mutations decrease the rate of desensitization of the response, increase the apparent affinity for acetylcholine and abolish current rectification. 7, which has channels with a single conductance level, the leucine-to-threonine mutant has an additional conducting state active at low acetylcholine concentrations. www.nature.com /nature/journal/v353/n6347/abs/353846a0.html   (422 words)

The Epithelial Na+ Channel: Cell Surface Insertion and Retrieval in Na+ Homeostasis and Hypertension -- Snyder 23 (2): ... a channel of eight to nine subunits (28). alter the expression of a protein at the cell surface (7, 29). This is the net result of channel synthesis and exocytosis, which are stimulated by aldosterone and vasopressin, and endocytosis and degradation, which are modulated by Nedd4. edrv.endojournals.org /cgi/content/full/23/2/258   (8106 words)

You lose some, you gain some - Cell Signaling Update - Signaling Gateway Three groups generated mutant ORAI1 channels and then used electrophysiological approaches to show this could alter channel's properties. Molecular identification of the CRAC channel by altered ion selectivity in a mutant of Orai. Orai1 is an essential pore subunit of the CRAC channel. www.signaling-gateway.org /update/updates/200611/nrm2044.html   (655 words)

Redox Reagents and Divalent Cations Alter the Kinetics of Cystic Fibrosis Transmembrane Conductance Regulator Channel ... A single CFTR channel recorded from a planar lipid bilayer in the presence of different divalent cations is shown. altered channel gating, increasing the duration of the CFTR channel The channel was prephosphorylated with PKA, which was then washed out prior to recording the current traces shown here. www.jbc.org /cgi/content/full/274/39/27536   (6394 words)

Presence of the nucleic acid channel in renal brush-border membranes: allosteric modulation by extracellular calcium -- ... To assess the basal kinetics of the channel in native BBM, channel To assess the pharmacological characteristics of the BBM channel, The channel was reconstituted as described, membrane potential was clamped at 100 mV, and data were collected under control conditions and in the presence of 1 mM oxaloacetate in the cis solution chamber (n = 8). ajprenal.physiology.org /cgi/content/full/289/1/F97   (5549 words)

Travel Reviews, Vacation Pictures - The Travel Channel These advertisements and links are provided solely as a convenience to you and not as an endorsement by the Travel Channel of their content, and the inclusion of such advertisements and links on the Web-site does not imply the Travel Channel's endorsement of the material in such advertisements or on such other web sites. You agree that the Travel Channel does not endorse those advertisements or web sites, is not responsible for their availability or their accuracy, or for their content, advertising, products, services or other resources. You further agree that the Travel Channel will not be liable or responsible, directly or indirectly, for any loss suffered or alleged to be suffered in connection with the use of or reliance upon such content, advertising, products, services or other resources made available by such advertisements or web sites. travelchannel.igougo.com /terms/default.asp   (2303 words)

H2O2 activates ryanodine receptor but has little effect on recovery of releasable Ca2+ content after fatigue -- Oba et ...   (Site not responding. Last check: 2007-10-31) alter responsiveness to channel modulators, such as Ca, adenine nucleotides, and caffeine (33). alter the extent of fatigue, as shown in Fig. Skeletal muscle receptor is a redox sensor with a well-defined redox potential, which is sensitive to channel modulators. jap.physiology.org /cgi/content/full/93/6/1999   (5559 words)

The channelopathies: novel insights into molecular and genetic mechanisms of human disease -- Kass 115 (8): 1986 -- ... Mutations may alter the permeation pathway (A) to inhibit the movement of ions through an open channel pore and may also alter ion channel gating by changing either the process by which channels open (activate) (B) or the process by which they inactivate (C). Transitions from the open to the inactivated state reduce the number of channels that are available to conduct ions. Mutations that destabilize the inactivated, nonconducting state of the channel are gain-of-function mutations and are common to diverse diseases, including LQTS, certain forms of epilepsy, and muscle disorders such as hyperkalemic paralysis. www.jci.org /cgi/content/full/115/8/1986   (2405 words)

IBM MQSeries : Library : Manuals   (Site not responding. Last check: 2007-10-31) Many of the other attributes needed on a cluster-receiver channel definition are the same as those that apply to a receiver-channel or a sender-channel definition. To define a cluster-sender channel you use the DEFINE CHANNEL command, specifying CHLTYPE(CLUSSDR), and many of the same attributes as you use to define a sender channel. Use the CLUSTER attribute to specify the name of the cluster with which this channel is associated. www-306.ibm.com /software/integration/library/manuals99/csqzah/csqzah12.htm   (925 words)

PMCB Faculty Show-Ling Shyng   (Site not responding. Last check: 2007-10-31) These gating properties enable KATP channels to link cell metabolism to cell excitability, thereby regulate a variety of physiological processes including insulin secretion, regulation of vascular tone, neurotransmitter release, and cytoprotection during cardiac and cerebral ischemia. The second project investigates the biogenesis and trafficking regulation of the channel, focusing on identifying structural determinants within the channel proteins as well as molecular chaperones in the ER lumen and the cytosol that are important for correct folding, assembly, and trafficking of the channel. Defective trafficking and function of KATP channels caused by a sulfonylurea receptor 1 mutation associated with persistent hyperinsulinemic hypoglycemia of infancy. www.ohsu.edu /pmcb/facultyresearch/shyng.shtml   (383 words)

Modulation of BKCa channel activity by fatty acids: structural requirements and mechanism of action -- Clarke et al. ... concentration of counterions in the vicinity of the channel and channel is mechanosensitive (32), intercalation of lipids into the membrane may affect membrane curvature, channels in bovine adrenal chromaffin cells are modulated by lipoxygenase metabolites of arachidonic acid. ajpcell.physiology.org /cgi/content/full/283/5/C1441   (8072 words)

Cable Channel To Alter Signal - New York Times LEAD: The Discovery Channel will become the latest cable television programmer to scramble its satellite-delivered signal in an attempt to thwart video pirates, a company official says. The Discovery Channel will become the latest cable television programmer to scramble its satellite-delivered signal in an attempt to thwart video pirates, a company official says. It is typically provided to cable subscribers as part of their basic package, with the cable system operator paying the Discovery Channel a fee per subscriber. query.nytimes.com /gst/fullpage.html?res=950DE3DF143BF931A3575BC0A96F948260   (224 words)

Mutations That Change the Position of the Putative gamma -Phosphate Linker in the Nucleotide Binding Domains of CFTR ... may be sufficient to open the channel (11-14). of channels with mutation of the NBD1 Walker A lysine (9, 10, are unlikely to interact directly with the channel pore (41). www.jbc.org /cgi/content/full/277/3/2125   (3982 words)

[ Integrated mar.com ] Ajax based development kits are being made available to developers by all of the major IT vendors, including Microsoft, IBM and Sun. It is not clear yet whether Microsoft intends to use advertising or subscriptions to finance this type of business model, added Senf. In the meantime, the Santa Clara based Jamcracker Inc. is offering a way out of the loss of software revenue for the channel with the advent of on demand services. www.echannelline.com /usa/story.cfm?item=20456   (586 words)

Alter   (Site not responding. Last check: 2007-10-31) Rip me open on your alter and let me drip down your body, staining deeply into your cold soul.As I fade away, I capture my reflection in your eyes. Alter Eco Fair Trade Ethiopia Organic Coffee, Whol... Joe Rocket Alter Ego 2.0 Mens Sport Textile Jacket... www.buzznet.com /tags/alter   (123 words)

RCN Help - Cable TV Channel Line-up Changes Contractual negotiations with networks, or a reorganization of channels to make room for future services are just two possible reasons. However, if you missed the notification that you received by mail, these pages contain all channel line-up changes made in the last 6 months. NTV America (Russian) moved from channel 112 to 116. www.rcn.com /customer/cabletv_lineupchanges.php?market=Queens   (405 words)

Pharmacology of CFTR Chloride Channel Activity -- SCHULTZ et al. 79 (1): 109 -- Physiological Reviews In addition to CFTR, two other Cl channels, an outwardly rectifying Cl channel (ORCC) and a Ca -activated Cl channel, are reported to contribute to the apical membrane Cl conductance. channel activity to be dysfunctional (85, 89, 103, 159, 178). channels resides on or near the cytoplasmic face of the channel. physrev.physiology.org /cgi/content/full/79/1/S109   (9213 words)

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