Silicon photonic olfactory sensor based on an array of 64 biofunctionalized Mach-Zehnder interferometers.

Silicon photonics can address a variety of applications, from datacom and biosensing to lidars. Recently, this technology has been explored for gas sensing. Detection and identification of odors remains a critical challenge in diverse areas such as air quality, food spoilage, or personal well-being.

What sounds reach fetuses: biological and nonbiological modeling of the transmission of pure tones.

In utero transmission of external and maternal sounds has been studied in pregnant women and in an animal model of human species, the sheep. These works, especially the most recent ones, suggest that local and environmental factors interfere in such a way that signals are attenuated in a complex manner as frequency increases. The present work investigated whether a plain rubber sphere which was filled with water could be considered as a reliable nonbiological model in a study describing the characteristics of sound transmission.

endo and exo isomers of isodicyclopentadienyltrichlorotitanium.

The diastereomeric endo and exo isomers of the title complex, [TiCl3(C10H11)], have been synthesized by electrophilic attack of TiCl4 on the exo- or endo-trimethylsilyl derivative of isodiCp (isodiCp = isodicyclopentadiene). This reaction proceeds with net inversion of configuration to give exclusively either the endo- or exo-(isodiCp)TiCl3 compound. Although the two isomers have similar unit-cell constants, they crystallize in different space groups.

Two derivatives of lithium isodicyclopentadienide: [(1,2,3,3a,7a-eta)-4,5,6,7-tetrahydro-4,7-methanoindenido] (N,N,N1,N1-tetramethylethylenediamine)lithium and Bis (1,4,7,10-tetraoxacyclododecane)-lithium(1+) Bis[(1,2,3,3a,7a-eta)-4,5,6,7-tetrahydro-4,7-methanoindenido]lithate(1- ).

Selective crystallization of a solution of lithium isodicyclopentadienide, (isodiCp)Li, in dry thf or diethyl ether under argon has produced two lithium complexes: (isodiCp)Li(TMEDA), [Li(C10H11)(C6H16N2)], (4), and [Li(12-crown-4)2]+. [Li(isodiCp)2]-, [Li(C8H16O4)2]-[Li(C10H11)2], (5). In (4) the Li+ ion is coordinated to the two N atoms of the disordered TMEDA and is eta 5-coordinated to the Cp ring of the isodiCp ligand.

Synthesis, Structure of Nitrogen-Containing Phosphinogold(I) Ferrocenes. In vitro Activity against Bladder and Colon Carcinoma Cell Lines.

The gold salt [(tht)AuCl] was reacted with [1-N,N-dimethylaminométhyl-2-diphenylphosphino]ferrocene (1) forming the bimetallic derivative 4. The reaction of methyl iodide and tetramethylammonium bromide on the chloride 4 produced the ammonium salt 5 and the bromide 6 respectively. New aminophosphines 2 and 3, which represent two of the rare phosphorylated metallocenes containing P(III)-N bond have also been coordinated to gold(I) to form 7 and 8.