Often considered a relic of the 1970s culture, marijuana is no longer a baby boom generation issue. Today, nearly 50 percent of U.S. teenagers try marijuana before they graduate high school, and by 12th grade, about 21 percent are regular users.
Consequently, treatment for marijuana dependence is on the rise, but, researchers have discovered, theres a catch – withdrawal symptoms, much like those experienced by people quitting cigarettes, cocaine or other drugs, may make abstinence more difficult to achieve. A new study in todays edition of the journal Drug and Alcohol Dependence shows that teens that use marijuana frequently also may face the same withdrawal symptoms that have been found to challenge adult marijuana users trying to quit.
Ryan Vandrey, a graduate student in psychology, and Alan Budney, Ph.D., associate professor of psychiatry and psychology at the University of Vermont, studied 72 adolescent marijuana users seeking outpatient treatment for substance abuse. Participants in the study were heavy marijuana users ages 14 to 19, who were primarily male Caucasians, and who completed study questionnaires. Nearly two-thirds of the participants reported experiencing four or more symptoms of marijuana withdrawal, including anxiety, aggression, and irritability. More than one-third of participants reported four or more symptoms that occurred at a moderate or greater severity level.
Jennifer Nachbur | EurekAlert!
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In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
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A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
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The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
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