With his passing, the scientific community lost a giant whose monumental achievements were matched only by his dignity, humility, honesty, and generosity to collaborators and competitors alike. Scores of former trainees lost a beloved mentor, colleague, and friend, and his family lost a devoted husband, father, and grandfather. During a career that spanned six decades, two centuries , three con...

An investigation of name-bearing types and other relevant type specimens of twelve nominal Leptopelis taxa described from or distributed in the Eastern Arc Mountains in East Africa was carried out. Our aim was to clarify their status and where necessary revise respective nomina. We suggest several nomenclatural and taxonomic actions: 1) Leptopelis barbouri Ahl, 1929 is transferred to the synony...

Franklin William Stahl studied DNA replication, bacteriophages, and genetic recombination in the US during the mid-twentieth and early twenty-first centuries. With his colleague Matthew Meselson, Stahl performed an experiment called the Meselson-Stahl experiment, which provided evidence for a process called semi-conservative DNA replication. Semi-conservative replication is a process in which e...

the genus conophorus meigen, 1803 (diptera: bombyliidae: conophorini) was studied in the north and northwestern parts of iran. three species of the genus conophorus were identified; two of them are recorded for the first time from iran, namely: c. pseudaduncus paramonov, 1929 and c. rjabovi paramonov, 1929, in addition to c. glaucescens (loew, 1863), which was previously recorded in iran. morph...

Rev Bras Cir Cardiovasc | Braz J Cardiovasc Surg rofessor Adib Domingos Jatene, indelible mark of pioneering spirit, honesty, wisdom and accurate surgical technique, left this life on the 14th of November. It saddened the entire Brazilian nation, impoverished without his striking and distinguished presence, always dedicated to healing the heart of ill patients and Brazil’s flaws. It especially ...

p. v . . . . The office of physical science is to discover those properties and relations of things in virtue of which they are capable of being used as instrumentalities; physical science makes claim to disclose not the inner nature of things but only those connections of things with one another that determine outcomes and hence can be used as means. The intrinsic nature of events is revealed ...