Synthesis of nano-Li4Ti5O12 decorated on non-oxidized carbon nanotubes with enhanced rate capability for lithium-ion batteries

In this study, we report a facile strategy for the synthesis of Li4Ti5O12 nanoparticles (15-20 nm) uniformly decorated on non-oxidized carbon nanotubes (CNTs) for use as the anode material in Li-ion batteries. In the newly designed microwave solvothermal synthesis, the CNTs were used to selectively heat a substrate for facilitating the preferential precipitation of nanoparticles. The resulting sample delivered a reversible capacity of 172 mA h g(-1) at 1 C-rate and showed remarkable rate capability by maintaining 60% of the capacity at 60 C-rate (vs. 1 C-rate).

Cyclo­hexane-1,2-diammonium bis­(pyridine-2-carboxyl­ate)

In the dication of the title salt, C6H16N2 2+·2C6H4NO2 −, the two ammonium groups are in the equatorial positions of the chair-shaped cyclo­hexyl ring. In the crystal, the cations and anions are linked by N—H⋯O and N—H⋯N hydrogen bonds, forming a layer network parallel to the ac plane. Weak π–π inter­actions between adjacent pyridine rings with a centroid–centroid distance of 3.589 (2) Å are also present

Bis(2,2′-bipyridine-κ2 N,N′)dichlorido­platinum(IV) dichloride monohydrate

In the title complex, [PtCl2(C10H8N2)2]Cl2·H2O, the Pt4+ ion is six-coordinated in a distorted octa­hedral environment by four N atoms from the two 2,2′-bipyridine ligands and two Cl atoms. As a result of the different trans influences of the N and Cl atoms, the Pt—N bonds trans to the Cl atom are slightly longer than those trans to the N atom. The compound displays inter­molecular hydrogen bonding between the water mol­ecule and the Cl anions. There are inter­molecular π–π inter­actions between adjacent pyridine rings, with a centroid–centroid distance of 3.962 Å

Effect of Apneic Oxygenation via Nasal Prong on Gas Exchange and Vital Signs during Fiberoptic Intubation under General Anesthesia

A clinical study for the evaluation of the effect of apneic oxygenation by nasal prong during fiberoptic orotracheal intubation on gas exchange and vital signs has been done on the patients who received tympanomastoidectomy (ASA c1assfication 1 and 2, aged from 20 to 40). Among them, 22 patients were selected whose fiberoptic intubation lasted more than 3 but less than 4 minutes, to observe the changes of Pa02, PaC02, HR, and MAP. 11 patients who underwent fiberoptic orotracheal intubation in apneic state without oxygen administration (Group I) showed similar increases in vital signs to the other 11 patients who received apneic oxygenation (Group II). PaC02 increased more in Group I than in Group II, which was not statistically significant. The differences of Pa02 at 1 and 2 minutes between two groups after removal of oxygen mask and beginning of fiberoptic intubation, were not statistically significant but Group II showed a significantly lesser degree of decrease in Pa02 at 3 minutes. We might say that apneic oxygenation during fiberoptic intubation under general anesthesia is useful because it could delay the onset of hypoxia, thereby provide extra time for intubation. Therefore we could attempt intubation up to 3 minutes on the fully relaxed patient, if we give oxygen via nasal prong

Axial strain dependence of all-fiber acousto-optic tunable filters

We report the axial strain dependence of two types of all-fiber acousto-optic tunable filters based on flexural and torsional acoustic waves. Experimental observation of the resonant wavelength shift under applied axial strain could be explained by theoretical consideration of the combination of acoustic and optical effects. We discuss the possibility of suppressing the strain effect in the filters, or conversely, the possibility of using the strain dependence for wavelength tuning or strain sensors