International Karaoke Day is celebrated annually on July 19th.
The day encourages people worldwide to visit karaoke bars, host parties,
and embrace the stress-relieving and mood-boosting benefits of singing.
The date marks the invention of the first karaoke machine by Japanese musician Daisuke Inoue in 1971. Daisuke Inoue invented the modern machine in Kobe, Japan,
The word "karaoke" come from the Japanese terms kara (empty) and oke (orchestra).
1704–1706:Prussian Blue was accidentally discovered in Berlin by the pigment maker Johann Jacob Diesbach while attempting to produce a red pigment. He used potash contaminated with animal-derived materials supplied by the alchemist Johann Konrad Dippel, resulting in a deep blue compound instead of red.
1710: The pigment began to be commercially manufactured in Berlin and became known as "Berlin Blue" or "Prussian Blue."
1724: The first scientific description of Prussian Blue was published by the French chemist Étienne François Geoffroy, helping establish its chemical significance.
Prussian Blue: Used In Diagnosis Of Sideroblastic Anemia
Sideroblastic Anemia
Prussian Blue stain is a special histochemical stain used to detect iron deposits in tissues and bone marrow. It plays a crucial role in the diagnosis of sideroblastic anemia.
Principle
Prussian Blue (Perls' stain) reacts with ferric iron (Fe³⁺) to form an insoluble blue pigment (ferric ferrocyanide).
First Cord Blood Transplant From An Unrelated Donor
Duke University: Joanne Kurtzberg (Cord Blood Pioneer)
This medical milestone proved that cryopreserved cord blood units from unrelated donors could safely and successfully be used to treat life-threatening conditions. This advancement laid the foundation for global public cord blood registries