Proteins are structural materials in much of the animal body (e.g. muscles, skin, and hair). They also form the enzymes that control chemical reactions throughout the body. Each protein molecule is composed of amino acids, which are characterized by inclusion of nitrogen and sometimes sulphur (these components are responsible for the distinctive smell of burning protein, such as the keratin in hair). The body requires amino acids to produce new proteins (protein retention) and to replace damaged proteins (maintenance). As there is no protein or amino acid storage provision, amino acids must be present in the diet. Excess amino acids are discarded, typically in the urine. For all animals, some amino acids are essential (an animal cannot produce them internally) and some are non-essential (the animal can produce them from other nitrogen-containing compounds). About twenty amino acids are found in the human body, and about ten of these are essential and, therefore, must be included in the diet. A diet that contains adequate amounts of amino acids (especially those that are essential) is particularly important in some situations: during early development and maturation, pregnancy, lactation, or injury (a burn, for instance). A complete protein source contains all the essential amino acids; an incomplete protein source lacks one or more of the essential amino acids.
When the body no longer needs the amino acids that are present, through which excretion are they lost?
urine

The University of Houston System's annual impact on the Houston area's economy equates to that of a major corporation: $1.1 billion in new funds attracted annually to the Houston area, $3.13 billion in total economic benefit and 24,000 local jobs generated. This is in addition to the 12,500 new graduates the U.H. System produces every year who enter the workforce in Houston and throughout the state of Texas. These degree-holders tend to stay in Houston. After five years, 80.5% of graduates are still living and working in the region.
How many local jobs are produced by the University of Houston?
24,000

In July 2006, a Hezbollah artillery assault on Israel's northern border communities and a cross-border abduction of two Israeli soldiers precipitated the month-long Second Lebanon War. On 6 September 2007, the Israeli Air Force destroyed a nuclear reactor in Syria. In May 2008, Israel confirmed it had been discussing a peace treaty with Syria for a year, with Turkey as a go-between. However, at the end of the year, Israel entered another conflict as a ceasefire between Hamas and Israel collapsed. The Gaza War lasted three weeks and ended after Israel announced a unilateral ceasefire. Hamas announced its own ceasefire, with its own conditions of complete withdrawal and opening of border crossings. Despite neither the rocket launchings nor Israeli retaliatory strikes having completely stopped, the fragile ceasefire remained in order. In what Israel described as a response to more than a hundred Palestinian rocket attacks on southern Israeli cities, Israel began an operation in Gaza on 14 November 2012, lasting eight days. Israel started another operation in Gaza following an escalation of rocket attacks by Hamas in July 2014.
How long did the operation in Gaza in November last?
eight days