The Ursinus Weekly, November 15, 1943

We must not lose this peace, urges Miss Sigrid Schultz • Who\u27s Who honors Ursinus seniors • Arsenic and Old Lace scores hit before two capacity audiences • Middleton celebrates fifth year in Navy • St. Luke\u27s holds special services: Ursinus graduates prominent in history of local church • Men debaters seek new Navy, civilian members • Mr. W. H. Ludwick speaks to students at vespers • Students and faculty meet • E. Jane Thomas to review Joseph P. Marquand\u27s book • Student leaders to direct combined Y fireside chats • First Lantern to be Jan.1; will be distributed free • Hobson and Duhring emerge gay, livable after paint, confusion • Navy men transferred • True confession • Coeds remain undefeated; take strong Temple team • Jayvee\u27s trounce Temple; Sally Secor leads attack • Jeanne Mathieu and Ann Harting lead charge of forward line • Hockeyists cut grass on old football field • State teachers bow to hockey elven • Penn booters blank bears 5-0; snow hampers play • Snell\u27s belles have unusual teamwork plus outstanding individual players • Grace Knopf leads dances at first WAA meetinghttps://digitalcommons.ursinus.edu/weekly/1718/thumbnail.jp

The Ursinus Weekly, April 17, 1944

Curtain Club chooses comedy, Junior Miss for May production • Juniors to present A spring night at annual prom this Friday evening • Girls will present The land of Oz • John McClellan named first vice-president for coming convention • Organized peace is not impossible say college students • Barbara Cooke to sing in recital tonight • Women debaters to travel to Albright College • Dr. Baker stresses need for teachers • Brotherhood sponsors devotional at Trinity • Dr. H. M. Leinbach to speak to pre-medical society • Students enjoy barn dance • Swing band to make debut at music club meeting • Civilian pre-meds to take aptitude test on April 28 • Class of \u2737 grad receives silver star citation • Ursinus circle presents dishes for infirmary • Students see Topper movie • AAUW holds session • Cranston started interesting life as a traveling salesman • Five seniors head girls\u27 softball lineup • Day study downs Maples in interdorm basketball • Grace Nesbitt leads day in victory over Shreiner • Ursinus bows to Navy baseball team in season\u27s opener on Annapolis field • Bears to play PMC Saturday • Ethel Detwiler marries • Justine Richards engaged • Frosh Phys Eds to entertainhttps://digitalcommons.ursinus.edu/weekly/1729/thumbnail.jp

The study of atmospheric ice-nucleating particles via microfluidically generated droplets

Ice-nucleating particles (INPs) play a significant role in the climate and hydrological cycle by triggering ice formation in supercooled clouds, thereby causing precipitation and affecting cloud lifetimes and their radiative properties. However, despite their importance, INP often comprise only 1 in 10³–10⁶ ambient particles, making it difficult to ascertain and predict their type, source, and concentration. The typical techniques for quantifying INP concentrations tend to be highly labour-intensive, suffer from poor time resolution, or are limited in sensitivity to low concentrations. Here, we present the application of microfluidic devices to the study of atmospheric INPs via the simple and rapid production of monodisperse droplets and their subsequent freezing on a cold stage. This device offers the potential for the testing of INP concentrations in aqueous samples with high sensitivity and high counting statistics. Various INPs were tested for validation of the platform, including mineral dust and biological species, with results compared to literature values. We also describe a methodology for sampling atmospheric aerosol in a manner that minimises sampling biases and which is compatible with the microfluidic device. We present results for INP concentrations in air sampled during two field campaigns: (1) from a rural location in the UK and (2) during the UK’s annual Bonfire Night festival. These initial results will provide a route for deployment of the microfluidic platform for the study and quantification of INPs in upcoming field campaigns around the globe, while providing a benchmark for future lab-on-a-chip-based INP studies