The year 2012 marked the 100th anniversary of the death of Gerhard Henrik Armauer Hansen (1841-1912), a Norwegian physician known for his identification of Mycobacterium leprae as the causative agent of leprosy. In the second half of the 19th century, the medical community believed leprosy had a noninfectious etiology, and it was not until Hansen uncovered the relationship between M leprae and ...

During the 22nd Congress of Carpathian-Balkan Geological Association (CBGA) held in Plovdiv, Bulgaria (September 7?11, 2022), 100th anniversary foundation CBGA was marked. A resolution for establishing ?Carpathian Association? adopted during 13th session international Brussels (August 19, 1922). it a result efforts and initiative R. Kettner(Czechoslovakia), J. Nowak (Poland), G. Munteanu Murgoc...

A set A ⇢ Fp is said to be reducible if it can be represented in the form A = B+ C with B, C ⇢ Fp, |B| , |C| 2. If there are no sets B, C with these properties then A is said to be primitive. First three criteria are presented for primitivity of subsets of Fp. Then the distance between a given set A ⇢ Fp and the closest primitive set is studied. –Dedicated to the memory of Paul Erdős on the occ...

Nature's repertoire of biosynthetic transformations has recently been recognized to include the Diels-Alder cycloaddition reaction. Evidence now exists that there are enzymes that mediate the Diels-Alder reaction in secondary metabolic biosynthetic pathways. 2002 marked the 100th anniversary of Alder's birth and 75 years since the discovery of the Diels-Alder reaction. It would appear that livi...

In 2020 the total income tax in Bulgaria marked its 100th anniversary. At beginning of 20th century, this was already vogue many countries developed world (Western Europe, USA, etc.). Johannes Popitz (1884-1945), professor law and Prussia's finance minister from 1933 to1944, "crowned" personal as queen taxes. The present study is devoted to genesis development general our country (Kingdom Bulga...

One of my first questions as a newly elected member of COPP (NJSNA’s Congress on Policy and Practice) was WHEN did it start and what happened to the Cabinet on Practice? The answer was in the archives at NJSNA Headquarters; so I journeyed there for a look into the past. If you remember our 100th Anniversary celebration in 2002, then you know that NJSNA was incorporated in 1902. Yet, the first m...