The Spectroheliograph is an instrument used in astronomy which captures a photographic image of the Sun at a single   wavelength of light, a monochromatic image. The wavelength is usually chosen to coincide with a spectral wavelength of one of the chemical elements present in the Sun.

The major milk proteins, including the caseins, ß-lactoglobulin and a-lactalbumin, are synthesized in the mammary epithelial cells and are only produced by the mammary gland.There are 3 or 4 caseins in the milk of most species; the different caseins are distinct molecules but are similar in structure. All other proteins found in milk are grouped together under the name of whey proteins. The major whey proteins in cow milk are beta-lactoglobulin and alpha-lactalbumin.

Weil's disease is a severe form of leptospirosis. This is a type of bacterial infection. It's caused by Leptospira bacteria. You can contract it if you come into contact with the urine, blood, or tissue of animals or rodents that are infected with the bacteria. High fever, headache, bleeding, muscle pain, chills, red eyes and vomiting are some symptoms. Without treatment, it can lead to kidney and liver damage and even death.

Prayut Chan-o-cha is a Thai politician, retired Royal Thai Army general officer, head of the National Council for Peace and Order, and recently appointed as the Prime Minister of Thailand. Prayut is a former Commander in Chief of the Royal Thai Army, the post he held from October 2010 to October 2014.

Yuvraj Singh ended a career which spanned 19 years after he made his debut in the ICC Champions Trophy in Kenya in 2000.Yuvraj Singh brought the curtains down on his decorated cricket career on Monday as he announced his retirement from international cricket in a press conference in Mumbai.

Canada has announced that it will ban single-use plastic products such as straws and bags starting in 2021.Justin Trudeau said his government is drawing inspiration from EU in planning ban on 'harmful' single-use plastics as early as 2021.

The ATP Rankings are the Association of Tennis Professionals' (ATP) merit-based method for determining the rankings in men's tennis. Novak Djokovic from Serbia has topped in the recently released ATP rankings.

Chemical ingredients of fireworks are chosen to produce specific colors. Copper is used to create mainly blue colors, and a little bit of green too. Carbon is used in fireworks prime components of black powder. Aluminum helps produce silver and white colors, and sparks and flames. Phosphorous helps fireworks ignite spontaneously in the air.

German silver is composed of various alloys of copper, zinc, and nickel, sometimes also containing lead and tin. German silver varies in composition, the percentage of the three elements ranging approximately as follows: copper, from 50% to 61.6%; zinc, from 19% to 17.2%; nickel, from 30% to 21.1%. The proportions are always specified in commercial alloys. German silver is extensively used because of its hardness, toughness, and resistance to corrosion.

Galena, also called lead glance, is the natural mineral form of lead (II) sulfide. It is the most important ore of lead and an important source of silver. Galena is one of the most abundant and widely distributed sulfide minerals.