Detection of Δ9-Tetrahydr0Cannabin0L in Human Breath Following Marijuana Smoking

1979 ◽  
Vol 12 (8) ◽  
pp. 867-880 ◽  
Author(s):  
J. L. Valentine ◽  
Paul J. Bryant ◽  
Paul L. Gutshall ◽  
Owen H. M. Gan ◽  
H. C. Niu
Keyword(s):  
Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 478
Author(s):  
Yudai Kudo ◽  
Saiko Kino ◽  
Yuji Matsuura

Human breath is a biomarker of body fat metabolism and can be used to diagnose various diseases, such as diabetes. As such, in this paper, a vacuum ultraviolet (VUV) spectroscopy system is proposed to measure the acetone in exhaled human breath. A strong absorption acetone peak at 195 nm is detected using a simple system consisting of a deuterium lamp source, a hollow-core fiber gas cell, and a fiber-coupled compact spectrometer corresponding to the VUV region. The hollow-core fiber functions both as a long-path and an extremely small-volume gas cell; it enables us to sensitively measure the trace components of exhaled breath. For breath analysis, we apply multiple regression analysis using the absorption spectra of oxygen, water, and acetone standard gas as explanatory variables to quantitate the concentration of acetone in breath. Based on human breath, we apply the standard addition method to obtain the measurement accuracy. The results suggest that the standard deviation is 0.074 ppm for healthy human breath with an acetone concentration of around 0.8 ppm and a precision of 0.026 ppm. We also monitor body fat burn based on breath acetone and confirm that breath acetone increases after exercise because it is a volatile byproduct of lipolysis.


2014 ◽  
Vol 1001 ◽  
pp. 426-431 ◽  
Author(s):  
Jana Müllerová ◽  
Jozef Puskajler

Alternative solid fuels becoming popular thanks to considerable fuel cost save (comparing to gas). Pellet quality varies depending on content of bark, straw and other non-wood additives. These additives decrease the combustion efficiency and increase the fuel consumption and solid emission. Pellets stored in large amount bring certain hazard for a man. They may become dangerous for the high fire risk due to self-ignition tendency and also due to moulds presence attacking the human breath system.


2017 ◽  
Vol 6 (4) ◽  
pp. 1
Author(s):  
Paul Dawson ◽  
Inyee Han ◽  
Danielle Lynn ◽  
Jenevieve Lackey ◽  
Johnson Baker ◽  
...  

This study examined the potential spread of bacteria when blowing out candles on a birthday cake. Preliminary tests of blowing on nutrient agar indicated that bioaerosols in human breath expelled from the mouth may be a source of bacteria transferred to cake surfaces. To test aerosol transfer to cake, icing was spread evenly over foil then birthday candles were placed through the foil into a Styrofoam™ base. After consuming pizza, test subjects were asked to extinguish the candles by blowing. Icing samples were sterilely recovered then surface plated, to determine the level of bacterial contamination. Blowing out the candles over the icing surface resulted in 1400% more bacteria compared to icing not blown on. Due to the transfer of oral bacteria to icing by blowing out birthday candles, the transfer of bacteria and other microorganisms from the respiratory tract of a person blowing out candles to food consumed by others is likely. 


Author(s):  
Ricard Huerta ◽  
Ricardo Domínguez

Resumen: El año 2020 ha estado marcado por una pandemia global causante de una situación extraña e impredecible a nivel planetario. Todos los países del mundo se encuentran en procesos de prevención sanitaria contra la COVID-19, un virus que ataca agresivamente el sistema inmunológico de las personas. Intentar llevar a cabo cualquier actividad supone un riesgo de contagio, ya que el coronavirus se propaga sobre todo a través del aliento humano, lo cual ha supuesto la irrupción de nuevos hábitos cotidianos, como usar siempre la mascarilla, o no poder reunirse con otra gente para celebraciones y eventos, ni tampoco dar clase en el aula. Inmersos en esta tesitura, desfavorable para cualquier intento de normalidad educativa, en el caso de la educación artística padecemos doblemente esta penosa realidad. En la coyuntura española, iniciábamos el año presentando una serie de alegaciones a la nueva ley de educación que el gobierno quiere aprobar (LOMLOE), una ley que prácticamente elimina las artes visuales del currículum escolar. También en otros países se está evidenciando un retroceso constante en materia de educación artística. Si el coronavirus está impulsando la práctica de las artes mediante el uso de tecnologías digitales, y la sociedad reivindica más enseñanzas en materia de prevención, salud, inclusión, igualdad, diversidad y lenguajes tecnológicos emergentes, deberíamos atender a estas necesidades que requiere el nuevo escenario educativo y vital. Ante tales evidencias, apostamos por una muerte digna de nuestra especialidad, tal y como la entendíamos hasta ahora, valorando que este derecho a la eutanasia supone el nacimiento de un concepto renovado de la educación artística, algo que deberemos abordar como prioridad y de manera inmediata.  Palabras clave: arte, educación artística, pandemia, formación de profesorado, coronavirus.  Abstract: This year 2020 has marked by a global pandemic that causes a strange and unpredictable situation at the planetary level. All countries are in health prevention processes due to COVID-19, a virus that attacks the immune system. Trying to do any activity poses a risk of contagion, since the coronavirus spreads especially through human breath, which has led to the invasion of new daily habits, such as leaving the house with a mask, or not being able to meet other people for celebrations and events, or to teach in the classroom. Immersed in this unfavorable situation for any educational normality, in the case of artistic education we suffer doubly from this painful reality. In Spain, we started the year presenting a series of complaints to the new education law that the government wants to pass (LOMLOE), a law that practically eliminates the visual arts from the school curriculum. Also in other countries, there is a constant decline in Art Education as curricular teaching. If the coronavirus is promoting the use of digital technologies, and society claims the teachings on prevention, health, inclusion, equality, diversity and emerging technological languages, we should attend to the needs required by the new educational and vital scenario. Faced with such evidence, we are committed to a death worthy of our specialty, as we understood it until now, understanding that this right to euthanasia implies the birth of a renewed concept of artistic education, something that we must do immediately as a priority.  Keywords: Art, Art Education, Pandemic, Teacher Training, Coronavirus.


1984 ◽  
Vol 26 (5) ◽  
pp. 619-626 ◽  
Author(s):  
E. Martin ◽  
W. Moll ◽  
P. Schmid ◽  
L. Dettli

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