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THC, the main psychoactive component of cannabis, may only be detectable in saliva and oral fluid for 2–24 hours in most cases. [8] [9] The main metabolite excreted in the urine is 11-Nor-9-carboxy-THC, also known as THC-COOH. Most cannabis drug tests yield a positive result when the concentration of THC-COOH in urine exceeds 50 ng/mL. [10]
Digital image correlation and tracking is an optical method that employs tracking and image registration techniques for accurate 2D and 3D measurements of changes in images. This method is often used to measure full-field displacement and strains , and it is widely applied in many areas of science and engineering.
The first routine measurements of river flow in England began on the Thames and Lea in the 1880s, [2] and in Scotland on the River Garry in 1913. [3] The national gauging station network was established in its current form by the early 1970s and consists of approximately 1500 flow measurement stations supplemented by a variable number of temporary monitoring sites. [2]
Georeferenced map images are available from the USGS as digital raster graphics (DRGs) in addition to digital data sets based on USGS maps, notably digital line graphs (DLGs) and digital elevation models (DEMs). In 2015, the USGS unveiled the topoView website, a new way to view their entire digitized collection of over 178,000 maps from 1884 to ...
The Wo/Men's Alliance for Medical Marijuana was founded in 1993 after 75% of Santa Cruz voters approved Measure A in November 1992. [65] And the Oakland Cannabis Buyers' Cooperative was founded in 1995 shortly before the city council passed multiple medical cannabis resolutions.
The strain has been combined with the White Widow strain to produce White Russian cannabis, a plant with "a pleasantly sweet aroma" and a "long lasting effect". [17] The Chronic strain of cannabis is a cross of AK-47 with Northern Lights and Skunk #1. [16] The Cherry AK phenotype is occasionally produced by AK-47 plants. [14]
[48] However, a January 2010 settlement between the U.S. Drug Enforcement Administration and the Wo/Men's Alliance for Medical Marijuana (WAMM) provided an example confirming the administration policy as communicated by Attorney General Eric Holder, as WAMM reached an agreement that allowed them to re-open after being shut down by the federal ...
During the Vietnam War period, cannabis use also became common among US forces in the United States and in Europe, with a 1971 article claiming that over 1,000 midshipmen at Annapolis Naval Academy used cannabis, and a survey in Germany showing that half of the soldiers in the surveyed battalion were regular cannabis users. [16]