Short-term memory deficits correlate with hippocampal-thalamic functional connectivity alterations following acute sleep restriction.

Acute sleep restriction heavily influences cognitive function, affecting executive processes such as attention, response inhibition, and memory. Previous neuroimaging studies have suggested a link between hippocampal activity and short-term memory function. However, the specific contribution of the hippocampus to the decline of short-term memory following sleep restriction has yet to be established.

Poly[[diaqua-μ(6)-succinato-di-μ(5)-succinato-didysprosium(III)] mono-hydrate].

The title compound, {[Dy(2)(C(4)H(4)O(4))(3)(H(2)O)(2)]·H(2)O}(n), is isostructural with other lanthanide succinates of the same formula. The Dy(III) atom is nine-coordinated in a tricapped trigonal-prismatic environment by eight O atoms, derived from six carboxyl-ate groups and a water mol-ecule. One of the independent succinate anions is located about a crystallographic inversion center and the uncoordinated water mol-ecule lies on a twofold axis.

Bis(μ-adamantane-1,3-dicarboxyl-ato-κO,O:O,O)bis-[aqua-(3-carboxy-adam-antane-1-carboxyl-ato-κO)(1,10-phen-an-throline-κN,N')erbium(III)] dihydrate.

The asymmetric unit of the binuclear centrosymmetric title compound, [Er(2)(C(12)H(14)O(4))(2)(C(12)H(15)O(4))(2)(C(12)H(8)N(2))(2)(H(2)O)(2)]·2H(2)O, contains one Er(III) atom, one coordinated water mol-ecule, one 1,10-phenanthroline (phen) ligand, two differently coordinated adamantane-1,3-dicarboxyl-ate (H(2)L) ligands and one lattice water mol-ecule. The Er(III) ion is eight-coordinated by four O atoms from bridging L(2-), one O atom from HL(-), one O atom from the coordinated water and two N atoms from a phen ligand. Extensive O-H⋯O hydrogen-bonding inter-actions result in the formation of chains which are further linked into a layer-like network by π-π stacking inter-actions centroid-centroid distance = 3.

Urea-adipic acid (2/1).

The asymmetric unit of the title co-crystal, 2CH(4)N(2)O·C(6)H(10)O(4), contains two urea mol-ecules and two half-mol-ecules of adipic acid; the latter are completed by crystallographic inversion symmetry. The crystal packing is stabilized by O-H⋯O and N-H⋯O hydrogen bonds, generating a chain along [110]. Additional weak inter-chain O-H⋯O and N-H⋯O inter-molecular inter-actions lead to the formation of a three-dimensional network.