Which of the following acid-base indicators should be used for the titration of NH3 with HBr? Kb of ammonia is 1.8 x 10^{-5}. 1. Methyl red, color change red/yellow at 4.4 less than pH less than 6.2 2. Any of these is suitable. 3. Neutral red, color ch ...
In the United States young men who have sex with men have higher rates of substance use, higher HIV incidence, and less frequent HIV testing than their het
The latter was heavily loaded with copper and ammonium sulfate by a Canadian factory producing rayon during the period 1926–1983. The maximum copper loading exceeded 50 tons/year and 2500 tons/year for nitrogen (ammonia). The consequences included a dramatic decrease in pH (to 4 and less) ...
Methods. A pretested anonymous mail survey was conducted in 1995 with all 241 obstetrician–gynecologists practicing in Quebec, Canada; 66% responded (N = 158). Results. Compared to less recently trained obstetrician–gynecologists, recently trained obstetrician–gynecologists reported routinely assessing ...
Further, substance use (i.e., not just those with substance use disorders) is associated with several other physical and behavioral health concerns among SGM individuals, such as unprotected sex [5, 6], nonadherence to HIV medication [7], and partner abuse [8]. Therefore, there is a ...
doi:10.1016/S0740-5472(02)00319-7 PubMedGoogle ScholarCrossref 58. Tesema L, Marshall J, Hathaway R, et al. Training in office-based opioid treatment with buprenorphine in US residency programs: A national survey of residency program directors. Subst Abus. 2018;39(4):...
The pH of the compound or substance with the same number of hydroxide and hydrogen ions is 7. The pH 7 is significantly the neutral pH which is the pH...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question...
A device for pelletizing or granulation of a liquid or pasty substance to particles having a diameter below 2 mm, with a feed line (5) for having a low boiling temperature, liquefied gas as a coolant, as well as with an inlet device (7),... STEFAN KOSOCK,STEFAN ZERWAS,WOLFGANG HOFFMA...
Seventy-three pregnant women completed the questionnaire during the first week of treatment with repeat testing at an average of 7 (SD 2.7) weeks later. Demographically, subjects were predominantly African American women (86%), with a mean age of 28.5 (SD 3.81) years and mean education of 11...
it is noteworthy that more than 80% of bacterial infections are related to biofilms7,8. Compared with planktonic bacteria, the shielding matrix of extracellular polymeric substance (EPS) in biofilms can not only protect the bacterial cells from host immune defenses, but also prevent the penetration...