Miller-urey''s experimental procedure, PL-SQL Programming

MILLER-UREY'S EXPERIMENTAL PROCEDURES -

  • They recreated the probable conditions on the primitive earth in the laboratory.
  • An atmosphere containing hydrogen, ammonia, methane in ratio of 2 : 1 : 2 and water vapour was created in one chamber of a spark discharge apparatus and condensed liquids were allowed to accumulate in the other chamber.
  • Energy was supplied by heating the liquid containing chamber as well as by electric sparks from electrodes in the gaseous chamber. Experiment was performed at 800°C for 7 days.

1609_miller experiment.png

  • They observed that amino acids like glycine, alanine aspartic acid and some more complex organic compounds were formed in vitro when the mixture of water vapours, methane, ammonia and hydrogen gasses in a close chamber is subjected to electric discharge for a few days.
  • This experiment confirmed the possibility of a biogenic synthesis of various containing complex organic compounds from the amino acids reducing mixture of simple gases.
  • Calvin Melvin (1958) irradiated CO and H2O directly in a cyclotron and obtained formic acid, succinic acid and oxalic acid.
Posted Date: 10/8/2012 8:47:03 AM | Location : United States







Related Discussions:- Miller-urey''s experimental procedure, Assignment Help, Ask Question on Miller-urey''s experimental procedure, Get Answer, Expert's Help, Miller-urey''s experimental procedure Discussions

Write discussion on Miller-urey''s experimental procedure
Your posts are moderated
Related Questions
Raise_application_error -  procedure of package DBMS_STANDARD , allows to issue an user_defined error messages by stored sub-program or database trigger.

Use the MASCOT tables CREDITRS, PORDS and PAYMENTS to write SQL queries to solve the following business problems. These tables / data are available to you via the USQ Oracle server

Use the RETURNING Clause Frequently, the application requires information about the row affected by a SQL operation, for illustration, to produce a report or take a subsequent

If two relations R and S are joined, then the non matching tuples of both R and S are ignored in __________________.

Many of the reports generated from the system calculate the total dollars in a shopper''s purchases. Follow these steps to create a function named TOT_PURCH_SF that accepts a shopp

Comparison Operators The Comparison operators can compare one expression to another. The outcome is always true, false, or null. Usually, you use a comparison operators in condi

CHECK Constraints in SQL A CHECK constraint is a table constraint defined using the key word CHECK, as already illustrated in several examples in this chapter. In particular,

WHEN or THEN Key Constraints Suppose a table has two columns representing a period of time throughout which the information conveyed by the other columns is recorded as having

Literals A literal is an explicit numeric, string, character, or Boolean value not represented by an identifier. Numeric literal 147 and the Boolean literal FALSE are some of

Definition of CROSS JOIN - SQL Let s = t1 CROSS JOIN t2, where t1 and t2 are table expressions optionally accompanied by range variables. Then: Note: Here T denotes Table