Results 21 to 30 of about 267,134 (305)

Caffeine release and absorption from caffeinated gums [PDF]

Food & Function, 2019
Caffeine release increased with chewing time (2 min < 5 min < 10 min). Two plasma caffeine concentration peaks were observed suggesting that caffeine absorption occurs both through the oral mucosa and gastrointestinal tract.
Cecile Morris, Sophie M. Viriot, Qurat U. A. Farooq Mirza, Gordon A. Morris, Anthony Lynn   +4 more
openaire   +3 more sources

Effect Solvent and Extraction Method on the Characteristics of Green Bean Robusta Coffee [PDF]

BIO Web of Conferences
One of the chemical elements found in coffee is caffeine, which is the second-largest secondary metabolite after chlorogenic acid. Robusta coffee has a higher caffeine content than Arabica.
Winarsih Sri, Sukardi Sukardi, Wachid Mochammad, Ismayawati Ayu Diawi   +3 more
doaj   +1 more source

Caffeine Inhibits EGF-Stimulated Trophoblast Cell Motility through the Inhibition of mTORC2 and Akt. [PDF]

, 2012
Impaired trophoblast invasion is associated with pregnancy disorders such as early pregnancy loss and preeclampsia. There is evidence to suggest that the consumption of caffeine during pregnancy may increase the risk of pregnancy loss; however, little is
Alison E. Wallace, Bauer, Beavo, Biadasiewicz, Boulbes, Brent, Brooke Lumicisi, Brosens, Burton, CARE Study Group, Cartwright, Cartwright, Cartwright, Chui, Di Fiore, Fabro, Foukas, Goldstein, Gude, Guy S. Whitley, Hofmann, Isobelle Grant, Jang, Judith E. Cartwright, Julien, LaMarca, LaMarca, LaMarca, Lee, Liu, Marone, Maslova, Mei, Olayioye, Omori, Pollheimer, Robertson, Spindle, Stefanidou, Tsygankova, Wadge, Weng, Yarden, Yarden, Yoshino, Zhang, Zoncu   +46 more
core   +1 more source

Espresso coffees, caffeine and chlorogenic acid intake: potential health implications [PDF]

, 2012
HPLC analysis of 20 commercial espresso coffees revealed 6-fold differences in caffeine levels, a 17-fold range of caffeoylquinic acid contents, and 4-fold differences in the caffeoylquinic acid:caffeine ratio.
Ashihara, Bond, Clifford, Crozier, Del Rio, IFIC Review, Lean, Lucas, Purdon, Rogers, Stalmach, Trugo, Wadge, Williamson   +13 more
core   +1 more source

Effects of chronic caffeine intake and withdrawal on neural activity assessed via resting-state functional magnetic resonance imaging in mice

Heliyon, 2022
Caffeine is a psychoactive substance that not only improves wakefulness, but also slows the cognitive decline caused by aging. However, at present, there are no reports about the effects of caffeine withdrawal, including headaches and changes in brain ...
Mitsuki Rikitake, Sachiko Notake, Karen Kurokawa, Junichi Hata, Fumiko Seki, Yuji Komaki, Hinako Oshiro, Naoki Kawaguchi, Yawara Haga, Daisuke Yoshimaru, Ken Ito, Hirotaka James Okano   +11 more
doaj   +1 more source

A new insight into the oxidative mechanism of caffeine and related methylxanthines in aprotic medium: May caffeine be really considered as an antioxidant? [PDF]

, 2018
Background: Antioxidant properties have been recently suggested for caffeine that seems showing protective effects against damages caused by oxidative stress. In particular, a HO% scavenging activity has been ascribed to caffeine. Even if the oxidation
Curulli, Antonella, Marrosu, Giancarlo, Petrucci, Rita, Zollo, Giuseppe   +3 more
core   +1 more source

Common questions and misconceptions about caffeine supplementation: what does the scientific evidence really show?

Journal of the International Society of Sports Nutrition
Caffeine is a popular ergogenic aid that has a plethora of evidence highlighting its positive effects. A Google Scholar search using the keywords “caffeine” and “exercise” yields over 200,000 results, emphasizing the extensive research on this topic ...
Jose Antonio, Daniel E. Newmire, Jeffrey R. Stout, Brandi Antonio, Maureen Gibbons, Lonnie M. Lowery, Joseph Harper, Darryn Willoughby, Cassandra Evans, Dawn Anderson, Erica Goldstein, Jose Rojas, Matías Monsalves-Álvarez, Scott C. Forbes, Jose Gomez Lopez, Tim Ziegenfuss, Blake D. Moulding, Darren Candow, Michael Sagner, Shawn M. Arent   +19 more
doaj   +1 more source

Investigating the removal of some pharmaceutical compounds in hospital wastewater treatment plants operating in Saudi Arabia [PDF]

, 2016
The concentrations of 12 pharmaceutical compounds (atenolol, erythromycin, cyclophosphamide, paracetamol, bezafibrate, carbamazepine, ciprofloxacin, caffeine, clarithromycin, lidocaine, sulfamethoxazole and Nacetylsulfamethoxazol (NACS)) were ...
Akunna, Joseph C., Al Qarni, Hamed M., Collier, Phillip, O'Keeffe, Juliette   +3 more
core   +3 more sources

The Safety of Ingested Caffeine: A Comprehensive Review

Frontiers in Psychiatry, 2017
Caffeine is the most widely consumed psychoactive drug in the world. Natural sources of caffeine include coffee, tea, and chocolate. Synthetic caffeine is also added to products to promote arousal, alertness, energy, and elevated mood.
Jennifer L. Temple, Jennifer L. Temple, Christophe Bernard, Steven E. Lipshultz, Jason D. Czachor, Joslyn A. Westphal, Miriam A. Mestre   +6 more
doaj   +1 more source

Molecular adsorption study of nicotine and caffeine on the single-walled carbon nanotube from first principles

, 2013
Using first-principles calculations, we investigate the electronic structures and binding properties of nicotine and caffeine adsorbed on single-walled carbon nanotubes to determine whether CNTs are appropriate for filtering or sensing nicotine and ...
Cano-Márquez, Castro Neto, Ceperley, Das Sarma, Gunn Kim, Han, Huang, Hyung-June Lee, Jiao, Kelly, Kosynkin, Li, Louie, Mickelson, Mickelson, Monkhorst, Nakada, Novoselov, Ozaki, Rangel, Troullier, Wallace, Wu, Young-Kyun Kwon, Zhang   +24 more
core   +1 more source