Category: Uncategorized

J.G. Hartnett, D. Mouneyrac, J.-M. Le Floch, J. Krupka, M.E. Tobar, D. Cros

Whispering Gallery modes in bulk cylindrical Gallium Arsenide and Gallium Phosphide samples have been examined both in darkness and under white light at cryogenics temperatures < 50 K. In both cases persistent photoconductivity was observed after initially exposing semiconductors to white light from a halogen lamp. Photoconductance decay time constants for GaP and GaAs were determined to be 0.900 +/- 0.081 ns and 1.098 +/- 0.063 ns, respectively, using this method.

Charles Cotton (1630-1687) was an English poet and writer, best known for his contributions to the literary world and his collaboration with the renowned author Izaak Walton. He was born on April 28, 1630, in Alstonefield, Staffordshire, England, as the son of Charles Cotton Sr., a wealthy landowner.

Cotton received a classical education and demonstrated a keen interest in literature from an early age. He inherited his father’s estate, Beresford Hall in Staffordshire, and lived a comfortable life, which allowed him to pursue his literary pursuits.

One of Charles Cotton’s most notable works is his collaboration with Izaak Walton on “The Compleat Angler,” a classic book on fishing and the joys of rural life. Cotton contributed the second part of the book, known as “Instructions How to Angle for a Trout or Grayling in a Clear Stream,” which complemented Walton’s original work. The book was published in 1676 and has since become a beloved and influential work in the realm of literature related to fishing and the countryside.

In addition to “The Compleat Angler,” Cotton was also known for his poetry. He wrote several poems on various topics, including nature, love, and political satire. His poem “To My Dear Friend Mr. Izaak Walton” is a tribute to his collaborative partner and friend.

Cotton’s poetry and writings reflected his appreciation for nature and rural life, often showcasing a love for the English countryside and the outdoors.

Despite his literary talents, Charles Cotton faced financial difficulties later in life due to mismanagement of his estate and investments. He was forced to sell his property, and his later years were marked by financial struggle.

Charles Cotton died on February 16, 1687, and was buried in St. James’s Church, Piccadilly, London. Although he may not be as well-remembered as some of his contemporaries, his contribution to “The Compleat Angler” and his poetry have secured him a place in English literary history.

Charlotte Auerbach (1899-1994) was a German-British geneticist known for her pioneering work in mutagenesis, the study of agents that cause mutations in DNA. She was born on May 14, 1899, in Krefeld, Germany.

Key Contributions and Achievements:

1. Discovering Mutagenesis: Auerbach conducted groundbreaking research on chemical mutagens, substances that can induce changes in the genetic material of organisms. She was one of the first scientists to investigate the mutagenic effects of chemical compounds.
2. Nitrous Acid Studies: Auerbach’s early research involved studying the mutagenic properties of nitrous acid, a chemical known to cause mutations in the DNA of bacteria. Her work demonstrated that chemicals could alter the genetic material of organisms and paved the way for further research on mutagenesis.
3. World War II: Auerbach fled Germany in 1933 due to the rise of the Nazi regime, and she settled in England. During World War II, she worked on research related to chemical warfare agents and their effects on DNA.
4. Mustard Gas Studies: Auerbach also investigated the mutagenic effects of mustard gas, a chemical weapon used during World War II. Her research on the mutagenic properties of mustard gas and related compounds contributed to the understanding of DNA damage caused by chemical agents.
5. Radiation Studies: Later in her career, Auerbach focused on the mutagenic effects of ionizing radiation, such as X-rays and gamma rays. Her work helped establish the link between radiation exposure and genetic mutations.
6. Genetics Education: Auerbach was a dedicated educator and mentor, and she played a significant role in training the next generation of geneticists. She taught at the University of Edinburgh and was influential in promoting the field of genetics.
7. Awards and Honors: Auerbach received several prestigious awards for her contributions to genetics and mutagenesis, including the Royal Society’s Darwin Medal and the Albert Lasker Special Achievement Award in Medical Science.

Charlotte Auerbach’s research on chemical mutagens and their effects on DNA significantly advanced the field of genetics and laid the groundwork for later studies on the causes of genetic mutations. Her work on the mutagenic effects of chemicals and radiation has had implications in fields such as cancer research and environmental health. She remains an important figure in the history of genetics and mutagenesis.