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When a chromosome breaks, if a part of it is deleted or lost, the missing piece of chromosome is referred to as a deletion or a deficiency. [ 2 ] For synapsis to occur between a chromosome with a large intercalary deficiency and a normal complete homolog, the unpaired region of the normal homolog must loop out of the linear structure into a ...
In the Class 7 textbook topic titled “Our Pasts-2”, pages 48 and 49 have been excluded. These pages mentioned “Mughal Emperors: Major campaigns and events.” The deletions also affected Biology and Chemistry textbooks as the theory of evolution and the periodic table were also purged from class 10 NCERT textbooks. [34] [35]
The National Standard Examination in Chemistry or NSEC is an examination in chemistry for higher secondary school students in India, usually conducted in the end of November. [1] The examination is organized by the Indian Association of Chemistry Teachers. Over 30,000 students, mainly from Standard 12, sit for this examination.
The Golden Seals moved after nine seasons in Oakland to become the Cleveland Barons; this was the first time in four decades the NHL approved a franchise relocation. [11] Two years later, after failed overtures towards merging with the Washington Capitals and the Vancouver Canucks , the Barons merged with the North Stars. [ 12 ]
The following outline acts as an overview of and topical guide to chemistry: . Chemistry is the science of atomic matter (matter that is composed of chemical elements), especially its chemical reactions, but also including its properties, structure, composition, behavior, and changes as they relate to the chemical reactions.
[25] c. 1530 Paracelsus develops the study of iatrochemistry, a subdiscipline of alchemy dedicated to extending life, thus being the roots of the modern pharmaceutical industry. It is also claimed that he is the first to use the word "chemistry". [8] 1597 Andreas Libavius publishes Alchemia, a prototype chemistry textbook. [26]
Screenshot of the CAS Common Chemistry database with information about caffeine ().. A CAS Registry Number [1] (also referred to as CAS RN [2] or informally CAS Number) is a unique identification number, assigned by the Chemical Abstracts Service (CAS) in the US to every chemical substance described in the open scientific literature, in order to index the substance in the CAS Registry.
The theme of IYC2011 was "Chemistry–our life, our future". It focused on the "achievements of chemistry and its contributions to the well-being of humankind." [1] It aimed to raise awareness of chemistry among the general public and to attract young people into the field, as well as to highlight the role of chemistry in solving global ...