An integrated photonic engine for programmable atomic control.

Solutions for scalable, high-performance optical control are important for the development of scaled atom-based quantum technologies. Modulation of many individual optical beams is central to applying arbitrary gate and control sequences on arrays of atoms or atom-like systems. At telecom wavelengths, miniaturization of optical components via photonic integration has pushed the scale and performance of classical and quantum optics far beyond the limitations of bulk devices.

Nathanael Mathaeus von Wolf and Johanna Henrietta Trosiener (Schopenhauer). Variolation in the 18th century on the Polish lands according to the guidelines of a doctor and the memoirs of his patient.

Variolation became a popular method in Europe in the eighteenth century. Sources from Gdańsk not only illustrate the guidelines that were used for these procedures, but also make it possible to compare that with the memories of the person on whom it was performed. In this case, the primary sources are: a 1772 work by physician Nathanael Mathaeus von Wolf, and the diaries of Johanna Henrietta Trosiener, mother of Arthur Schopenhauer.

Sodium Aminodiboranates Na(HBNRBH): Structural and Spectroscopic Studies of Steric and Electronic Substituent Effects.

We describe the syntheses of a series of sodium aminodiboranate salts, Na(HB-NR-BH), with different substituents on nitrogen, including sodium salts of the unsubstituted aminodiboranate, HB-NH-BH, and of the N-substituted anions HB-NRR'-BH, where NRR' = NHMe, NHEt, NH(SiMe), NEt, N(-Pr), N(SiMe), NMe(-Pr), NMe(-Bu), NMe(SiMe), and the pyrrolidide and piperidide derivatives NCH, NCH, and NCH--2,6-Me. The compounds have been characterized by H and B NMR spectroscopy and IR spectroscopy; crystallographic studies have been carried out for the unsolvated ,-dimethylaminodiboranate salt Na(HB-NMe-BH) and several sodium aminodiboranate salts in which the sodium ions are solvated with ethers (dioxane, diglyme, tetrahydrofuran, and 12-crown-4) or amines (,,','-tetramethylethylenediamine). One of the structures contains a rare example of an ether ligand in which one oxygen atom bridges between two metal ions.

Rapidly Establishing a Hospital-Based Convalescent Plasma Collection Center With the Alyx Apheresis Collection Device.

The effort to collect convalescent plasma from individuals who recovered from COVID-19 began in earnest during the spring of 2020. Either whole blood or apheresis donations were obtained, the latter yielding higher numbers of units per donor per collection and more frequent collections. The NorthShore University HealthSystem blood donor center purchased 2 Alyx (Fresenius Kabi) apheresis plasma collection devices and quickly implemented them in order to collect COVID-19 convalescent plasma.