Macau 2011 Issue with MRI

Macau Post released on 28 October 2011 a souvenir sheet and a set of 4 stamps commemorating the 140th Anniversary of the Kiang Wu (Mirror Lake) Hospital Charity Association. The central figure in the souvenir sheet is Dr Sun Yat-sen who joined the hospital in 1892 as a voluntary doctor for western medicine, thus introducing western medicine to the institution. On the right side of the souvenir sheet is an early day microscope which could have been used by Dr Sun. Two photos overlapping the right side of the stamp and the sheet selvage illustrate modern medical technology - the MRI whole-body scanner and video-aided key-hole surgery.
Of the 4 stamps, one features a traditional tool for preparing traditional chinese medicine (TCM), another shows a patient undergoing MRI scanning.

Portugal 2011 World Veterinary Year

One of the four stamps released by Portugal on 7 September 2011, to mark World Veterinary Year, features the horse with graphical representation of DNA; the theme of the stamp is animal production and improvement. Incidentally, the first draft genome sequence of the domestic horse (Equus caballus) was completed in April 2007.

Poland 2011 Rudolf Stefan Weigl

One of the 4 stamps released on 29 August 2011 by Poland, on the theme of famous Poles, features Rudolf Stefan Weigl (1883-1957) who invented the first effective vaccine against epidemic typhus in 1933. Weigl's vaccine was made up of ground up lice; lice were responsible for the spread of typhus; the first major application of this vaccine took place between 1936 and 1943 by the Belgian missionaries in China. More modern vaccine against typhus has been invented since then.

Monaco 1974 Centenary of birth of Ernest Duchesne

4 years after Sir Alexander Fleming received the Nobel Prize for the discovery of penicillin, the French National Academy of Medicine (l’Académie nationale de médecine) officially recognized Ernest Duchesne's original work in 1894 as the original discovery of antibiotics! This stamp released by Monaco on 8 May 1974 celebrates the birth centenary of Ernest Duchesne. Duchesne enrolled at l'Ecole du Service de Santé Militaire de Lyon (School of Military Health Services in Lyons) in 1894, and in 1897 submitted his thesis, “Contribution à l’étude de la concurrence vitale chez les micro-organismes: antagonisme entre les moisissures et les microbes” (Contribution to the study of competitive survival of micro-organisms: Antagonism between moulds and microbes) to get his doctoral degree. This was considered the first study in the therapeutic capabilities of moulds resulting from their anti-microbial activity. Because of his youth and military commitment, his recommendation in his thesis for further investigation into this phenomenon was ignored. Duchesne died at age of 37 on 12 April 1912, from a lung infection, probably tuberculosis.

Mozambique 2011 Alexander Fleming

On 30 June 2011 Mozambique released 2 souvenir sheets celebrating the life of Alexander Fleming as one of the most important scientists in the 20th century. Knighted in 1944, Sir Alexander Fleming, a Scottish biologist and pharmacologist, was born 6 August 1881. He discovered penicillin in 1928, pioneering the age of antibiotics, and received the Nobel Prize in Physiology and Medicine in 1945 for it. In 1999, Time magazine named Fleming one of the 100 Most Important People of the 20th Century. As such a famous personality, Sir Alexander Fleming is featured in many stamps. For this issue, the first stamp in the souvenir sheet with 4 stamps features the molecular structure of penicillin, whereas the core structure of the penicillin group of antibiotics is shown on the selvage of the smaller souvenir sheet. The background of both souvenir sheets are filled with white pills, probably an antibiotic.

DNA representing biology on Liechtenstein stamp

On 28 August 1969 Liechtenstein released a set of 4 stamps to celebrate the 250th anniversary of the Duchy of Liechtenstein. Each of the 4 stamps features an important field of study - biology, physics, astronomy and art. The stamp representing biology features a man and the double-helical structure of DNA. This is the earliest use of the double helix to represent science on a stamp design. Scott 454.

Peru 2011 International Year of Chemistry

Peru released on 1 August 2011 a stamp commemorating the International Year of Chemistry, featuring an array of symbols representing the connections between chemistry and the Peruvian coat of arms. For example, the helical structure of keratin, the main polymeric material that makes up the wool of the vicuña and other camelids, is shown to the left of the coat of arms; and to right, the molecular structure of quinine, the classic antimalarial drug extracted from the bark of the cinchona tree. Also shown are the symbol and electronic configuration of gold (Au for Aurantium) since a cornucopia spilling coins of the noble metal is included in the bottom half of the coat of arms. Then there's the logo of the Colegio de Químicos del Perú, the organization representing all professional chemists in the country (not to be confused with the Peruvian Chemical Society). The lower portion of the stamp has images showing chemists handling reagents and working in laboratories.