Octopaminergic sensitivity of the glia that form the blood—brain barrier of the cockroach was examined using microelectrode recordings of the potential developed across this barrier layer, the perineurium. Exposure to 10~moll~ DL-octopamine had no significant effect upon the changes in potential induced by substitution of Tris for external sodium. Treatment with concentrations ranging from 10~m...

Potassium is an earth abundant alternative to lithium for rechargeable batteries, but a critical limitation in potassium ion battery anodes is the low capacity of KC8 graphite intercalation compounds in comparison to conventional LiC6. Here we demonstrate that nitrogen doping of few-layered graphene can increase the storage capacity of potassium from a theoretical maximum of 278 mAh/g in graphi...

SYNTHESIS 2006, No. 19, pp 3316–3340xx.xx.2006 Advanced online publication: 06.09.2006 DOI: 10.1055/s-2006-950231; Art ID: C04506SS © Georg Thieme Verlag Stuttgart · New York Abstract: A combination of palladium(II) acetate, aqueous potassium fluoride, and polymethylhydrosiloxane (PMHS) facilitates the room-temperature reduction of aromatic nitro compounds to anilines. These reactions tend to b...

A series of phthiobuzone analogs, prepared from potassium phthalimide or phthalandione, have been evaluated for their antiviral activities. Among the candidates, compounds 5j and 5k, which contain the substituted 4-halogenated phenyl ring at N-4',4'' position, show more potent antiviral activity than phthiobuzone against herpes simplex virus 1 (IC(50)=8.56 and 2.85 microg/ml, respectively) and ...

Glass products are important evidence of early East–West cultural exchanges. Ancient glass in China mostly consisted lead glass, and potassium is widely believed to be imported abroad. In order figure out the origin artefacts, it crucial define type accurately. contemporary research on chemical composition ancient products, separated from primarily by weight ratio oxides or proportion lead-cont...

Abstract. Anwar AR, Ala A, Kuswinanti T, Syam’un E. 2022. The ability of potassium-solubilizing fungi isolated from leucite potassium rock deposits. Biodiversitas 23: 6579-6586. Present investigation was aimed to explore the potassium-dissolving some indigenous living in Indonesian tuffs volcanic members Camba Formation Barru Regency, South Sulawesi Province. There are no such findings on recen...

A Chan–Lam-type C–S coupling reaction using sodium aryl sulfinates has been developed to provide diaryl thioethers in up 92% yields the presence of a copper catalyst and potassium sulfite. Both electron-rich electron-poor diverse organoboron compounds were tolerated for synthesis heteroaryl dithioethers. The mechanistic study suggested that sulfite was involved deoxygenation sulfinate through r...

Abstract Sodium and potassium tert- butyl peroxide hydrates 2Na + ·2C 4 H 9 $${\text{O}}_{2}^{ - }$$ ·7H 2 O ( I ) 2K · 2C ·4H II were prepared. According to X-ray diffraction data (CIF files CCDC no. 2081025 2081024 )), the compounds are coordination polymers in which alkali metal atoms have C.N.(Na) of 6 or C.N.(K) 8. The crystal packings comprise layers with clearly defined hydrophobic surfa...

KATP channels are composed of a small inwardly rectifying K+ channel subunit, either KIR6.1 or KIR6.2, plus a sulfonylurea receptor, SUR1 or SUR2 (A or B), which belong to the ATP-binding cassette superfamily. SUR1/KIR6.2 reconstitute the neuronal/pancreatic beta-cell channel, whereas SUR2A/KIR6.2 and SUR2B/KIR6.1 (or KIR6.2) are proposed to reconstitute the cardiac and the vascular-smooth-musc...

Intracellular blockade by quaternary ammonium (QA) molecules of many potassium channels is state dependent, where the requirement for channel opening is evidenced by a time-dependent component of block in the macroscopic record. Whether this is the case for Ca(2+)- and voltage-activated potassium (BK) channels, however, remains unclear. Previous work (Li, W., and R.W. Aldrich. 2004. J. Gen. Phy...