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https://www.readbyqxmd.com/read/28339669/in-their-own-words-young-adults-menthol-cigarette-initiation-perceptions-experiences-and-regulation-perspectives
#1
Olivia A Wackowski, Kiameesha R Evans, Melissa B Harrell, Alexandra Loukas, M Jane Lewis, Cristine D Delnevo, Cheryl L Perry
Background: Menthol cigarettes are disproportionately used by young people and have been called smoking starter products. However, limited qualitative research exists on young adults' perceptions of and experiences with these products, with much of it based on document reviews of the tobacco industry's research. Methods: We conducted six focus groups with young adult (ages 18-24) menthol smokers in New Jersey (half with black smokers) between December 2014 and March 2015...
February 17, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28334512/flow-pickering-emulsion-interfaces-enhance-catalysis-efficiency-and-selectivity-for-cyclization-of-citronellal
#2
Hengquan Yang, Huan Chen, Houbing Zou, Yajuan Hao
Cyclization of citronellal is a necessary intermediate step to produce the important flavor chemical (-)-menthol. We here demonstrate a continuous flow Pickering emulsion (FPE) strategy for selective cyclization of citronellal to (-)-isopulegol, using water droplets hosting heteropolyacid catalyst (HPA) to fill a column reactor. Owing to the large liquid-liquid interface and the excellent confinement capability of droplets toward HPA, the FPE system exhibits a catalysis efficiency much higher than those of batch systems (2~5 fold) and an excellent durability (two months)...
March 23, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28334238/separate-and-combined-effects-of-mentha-piperata-and-mentha-pulegium-essential-oils-and-a-pathogenic-fungus-lecanicillium-muscarium-against-aphis-gossypii-hemiptera-aphididae
#3
Asgar Ebadollahi, Mahdi Davari, Jabrael Razmjou, Bahram Naseri
In the present study, the toxicity of essential oils of Mentha piperata L. and Mentha pulegium L. and pathogenicity of Lecanicillium muscarium (Zare & Gams) were studied in the melon aphid, Aphis gossypii Glover. Analyses of the essential oils by GC-MS indicated limonene (27.28%), menthol (24.71%), menthone (14.01%), and carvol (8.46%) in the M. piperata essential oil and pulegone (73.44%), piperitenone (5.49%), decane (4.99%), and limonene (3.07%) in the essential oil of M. pulegium as the main components...
March 3, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28333107/perceptions-and-experiences-with-flavored-non-menthol-tobacco-products-a-systematic-review-of-qualitative-studies
#4
REVIEW
Sarah D Kowitt, Clare Meernik, Hannah M Baker, Amira Osman, Li-Ling Huang, Adam O Goldstein
Although a few countries have banned flavored cigarettes (except menthol), flavors in most tobacco products remain unregulated across the globe. We conducted a systematic review of qualitative studies examining perceptions of and experiences with flavored non-menthol tobacco products. Of 20 studies on flavored tobacco products included in our qualitative systematic review, 10 examined hookah, six examined e-cigarettes, two examined little cigars and cigarillos (LCCs), and three examined other tobacco products, including cigarettes...
March 23, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28326071/temporal-variations-in-cigarette-tobacco-bacterial-community-composition-and-tobacco-specific-nitrosamine-content-are-influenced-by-brand-and-storage-conditions
#5
Jessica Chopyk, Suhana Chattopadhyay, Prachi Kulkarni, Eoghan M Smyth, Lauren E Hittle, Joseph N Paulson, Mihai Pop, Stephanie S Buehler, Pamela I Clark, Emmanuel F Mongodin, Amy R Sapkota
Tobacco products, specifically cigarettes, are home to microbial ecosystems that may play an important role in the generation of carcinogenic tobacco-specific nitrosamines (TSNAs), as well as the onset of multiple adverse human health effects associated with the use of these products. Therefore, we conducted time-series experiments with five commercially available brands of cigarettes that were either commercially mentholated, custom-mentholated, user-mentholated, or non-mentholated. To mimic user storage conditions, the cigarettes were incubated for 14 days under three different temperatures and relative humidities (i...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28325123/effect-of-stimulation-of-cold-receptors-with-menthol-on-emg-activity-of-quadriceps-muscle-during-low-load-contraction
#6
Tadayuki Tokunaga, Hitoshi Sugawara, Chigaya Tadano, Masuo Muro
PURPOSE: Facilitatory and inhibitory responses of spinal motor neurons are influenced by somatosensory input from the skin. The purpose of this study, employing electromyography, was to examine the neuromuscular changes that occur with menthol applied to the skin over the quadriceps muscle. METHODS: Forty-two healthy volunteers performed isometric knee extensions at 35% maximum voluntary contraction (MVC) in three groups (Adult Placebo, Adult Menthol, Older Adult Menthol)...
March 21, 2017: Somatosensory & Motor Research
https://www.readbyqxmd.com/read/28322843/the-effect-of-menthol-on-acute-experimental-colitis-in-rats
#7
Masoumeh Ghasemi-Pirbaluti, Ehsan Motaghi, Homan Bozorgi
Menthol is an aromatic compound with high antiinflammatory activity. The purpose of the current research is to investigate the effectiveness of menthol on acetic acid induced acute colitis in rats. Animals were injected with menthol (20 and 50 and 80mg/kg, i.p.) 24h prior to induction of colitis for 3 consecutive days. Menthol at medium and higher doses similar to dexamethasone as a reference drug significantly reduced body weight loss, macroscopic damage score, ulcer area, colon weight, colon length and improved hematocrit in rats with colitis...
March 16, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28320952/identification-of-a-putative-binding-site-critical-for-general-anesthetic-activation-of-trpa1
#8
Hoai T Ton, Thieu X Phan, Ara M Abramyan, Lei Shi, Gerard P Ahern
General anesthetics suppress CNS activity by modulating the function of membrane ion channels, in particular, by enhancing activity of GABAA receptors. In contrast, several volatile (isoflurane, desflurane) and i.v. (propofol) general anesthetics excite peripheral sensory nerves to cause pain and irritation upon administration. These noxious anesthetics activate transient receptor potential ankyrin repeat 1 (TRPA1), a major nociceptive ion channel, but the underlying mechanisms and site of action are unknown...
March 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28318902/flavored-tobacco-product-use-in-youth-and-adults-findings-from-the-first-wave-of-the-path-study-2013-2014
#9
Andrea C Villanti, Amanda L Johnson, Bridget K Ambrose, K Michael Cummings, Cassandra A Stanton, Shyanika W Rose, Shari P Feirman, Cindy Tworek, Allison M Glasser, Jennifer L Pearson, Amy M Cohn, Kevin P Conway, Raymond S Niaura, Maansi Bansal-Travers, Andrew Hyland
INTRODUCTION: The 2009 Family Smoking Prevention and Tobacco Control Act banned characterizing flavors other than menthol in cigarettes but did not restrict their use in other forms of tobacco (e.g., smokeless, cigars, hookah, e-cigarettes). METHODS: A cross-sectional analysis of Wave 1 data from 45,971 U.S. adults and youth, aged ≥12 years in the Population Assessment of Tobacco and Health (PATH) Study collected in 2013-2014, was conducted in 2016. This study examined (1) the prevalence and reasons for use of flavored tobacco products; (2) the proportion of ever tobacco users reporting that their first product was flavored; and (3) correlates of current flavored tobacco product use...
March 13, 2017: American Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28283988/nicotine-population-pharmacokinetics-in-healthy-adult-smokers-a-retrospective-analysis
#10
Mathilde Marchand, Patrick Brossard, Henri Merdjan, Nicola Lama, Rolf Weitkunat, Frank Lüdicke
BACKGROUND AND OBJECTIVE: Characterizing nicotine pharmacokinetics is challenging in the presence of background exposure. We performed a combined retrospective population pharmacokinetic analysis of 8 trials, including exposure to Tobacco Heating System and cigarettes (both inhaled), nicotine nasal spray and oral nicotine gum. METHOD: Data from 4 single product use trials were used to develop a population pharmacokinetic model with Phoenix(®) NLME™ and to derive exposure parameters...
March 10, 2017: European Journal of Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/28278356/computational-fluid-dynamics-and-trigeminal-sensory-examinations-of-empty-nose-syndrome-patients
#11
Chengyu Li, Alexander A Farag, James Leach, Bhakthi Deshpande, Adam Jacobowitz, Kanghyun Kim, Bradley A Otto, Kai Zhao
OBJECTIVE: The precise pathogenesis of empty nose syndrome (ENS) remains unclear. Various factors such as nasal aerodynamics and sensorineural dysfunction have been suspected, although evidence is limited. This study reported the first examination of both nasal aerodynamics and trigeminal sensory factors in actual ENS patients. STUDY DESIGN: Prospective case control. METHODS: We enrolled six patients diagnosed with ENS. Three patients had pre- and post-inferior turbinate (IT) reduction computed tomography scans, which allowed comparison of their nasal aerodynamics changes through computational fluid dynamic (CFD) simulation...
March 9, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28271955/probing-the-interaction-mechanism-of-menthol-with-blood-plasma-proteins-and-its-cytotoxicity-activities
#12
Daniel Pushparaju Yeggoni, Aparna Rachamallu, Shreya Dubey, Argha Mitra, Rajagopal Subramanyam
No abstract text is available yet for this article.
March 8, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28250658/growth-inhibition-and-morphological-alteration-of-fusarium-sporotrichioides-by-mentha-piperita-essential-oil
#13
P Rachitha, K Krupashree, G V Jayashree, Natarajan Gopalan, Farhath Khanum
OBJECTIVE: The aim of this study is to determine the phytochemical composition, antifungal activity of Mentha piperita essential oil (MPE) against Fusarium sporotrichioides. METHODS: The phytochemical composition was conducted by gas chromatography mass spectrometry (GC MS) analysis and mycelia growth inhibition was determined by minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC), the morphological characterization was observed by scanning electron microscopy...
January 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28250152/acute-corneal-epithelial-debridement-unmasks-the-corneal-stromal-nerve-responses-to-ocular-stimulation-in-rats-implications-for-abnormal-sensations-of-the-eye
#14
Harumitsu Hirata, Kamila K Mizerska, Valentina A Dallacasagrande, Victor H Guaiquil, Mark I Rosenblatt
It is widely accepted that the mechanisms for transducing sensory information reside in the nerve terminals. Occasionally, however, studies have appeared demonstrating that similar mechanisms may exist in the axon to which these terminals are connected. We examined this issue using the cornea where nerve terminals in the epithelial cell layers are easily accessible for debridement, leaving the underlying stromal (axonal) nerves undisturbed. In isoflurane-anesthetized rats, we recorded extracellularly from single trigeminal ganglion neurons innervating the cornea that are excited by ocular dryness and cooling: low threshold (<2 oC cooling) and high threshold (>2 oC) cold-sensitive plus dry sensitive (LT-CS+DS and HT-CS+DS) neurons, playing possible roles in tearing and ocular pain...
March 1, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28244265/separation-of-epimeric-aromatic-acid-menthol-esters-by-countercurrent-chromatography-using-hydroxypropyl-%C3%AE-cyclodextrin-as-an-additive
#15
Xiaoping Wang, Liqiong Lv, Zhisi Bu, Jizhong Yan, Shengqiang Tong
The separation of ten epimeric aromatic acid (-)-menthol esters by countercurrent chromatography with hydroxypropyl-β-cyclodextrin as the mobile phase additive was investigated, and methods for the analysis of all the epimeric esters by reversed-phase high-performance liquid chromatography were established. A biphasic solvent system composed of n-hexane/20-70% methanol containing 50 mmol L(-1) of hydroxypropyl-β-cyclodextrin (1:1, v/v) was selected, which provided high separation factors for five of the epimeric esters, and successful separations by countercurrent chromatography were achieved...
February 28, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28242592/perceptions-of-menthol-cigarettes-among-twitter-users-content-and-sentiment-analysis
#16
Shyanika W Rose, Catherine L Jo, Steven Binns, Melissa Buenger, Sherry Emery, Kurt M Ribisl
BACKGROUND: Menthol cigarettes are used disproportionately by African American, female, and adolescent smokers. Twitter is also used disproportionately by minority and younger populations, providing a unique window into conversations reflecting social norms, behavioral intentions, and sentiment toward menthol cigarettes. OBJECTIVE: Our purpose was to identify the content and frequency of conversations about menthol cigarettes, including themes, populations, user smoking status, other tobacco or substances, tweet characteristics, and sentiment...
February 27, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28238800/activation-of-the-cold-receptor-trpm8-by-low-levels-of-menthol-in-tobacco-products
#17
Meike Paschke, Anna Tkachenko, Katja Ackermann, Christoph Hutzler, Frank Henkler, Andreas Luch
Activation of the cold-receptor TRPM8 by menthol or other tobacco additives can suppress natural defense reactions such as coughing that usually would become effective as involuntary resistance against the inhalation of fumes. In Europe menthol is only regulated as flavor, but can be used as additive as long as no characteristic mint-like aroma will become noticeable in the end-product tobacco. The question needs to be addressed of whether such comparatively minor contents would be sufficient to trigger a measurable activation of TRPM8...
February 24, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28225032/4-isopropylcyclohexanol-has-potential-analgesic-effects-through-the-inhibition-of-anoctamin-1-trpv1-and-trpa1-channel-activities
#18
Yasunori Takayama, Hidemasa Furue, Makoto Tominaga
Interactions between calcium-activated chloride channel anoctamin 1 (ANO1) and transient receptor potential vanilloid 1 (TRPV1) enhance pain sensations in mice, suggesting that ANO1 inhibition could have analgesic effects. Here we show that menthol and the menthol analogue isopropylcyclohexane (iPr-CyH) inhibited ANO1 channels in mice. The iPr-CyH derivative 4-isopropylcyclohexanol (4-iPr-CyH-OH) inhibited mouse ANO1 currents more potently than iPr-CyH. Moreover, 4-iPr-CyH-OH inhibited the activities of TRPV1, TRP ankyrin 1 (TRPA1), TRP melastatin 8 (TRPM8) and TRPV4...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28224626/intranasal-trigeminal-function-in-patients-with-empty-nose-syndrome
#19
Iordanis Konstantinidis, Evangelia Tsakiropoulou, Angelos Chatziavramidis, Christos Ikonomidis, Konstantinos Markou
OBJECTIVES/HYPOTHESIS: Trigeminal nerve mediates the perception of nasal airflow. This study examines whether impaired intranasal trigeminal function is a part of the paradoxical nasal obstruction sensation in patients with empty nose syndrome (ENS). STUDY DESIGN: Prospective case-control study in a tertiary hospital. METHODS: Three groups were examined: 1) ENS patients with previous bilateral near total inferior turbinectomy, 2) patients who underwent near total inferior turbinate removal (ITR) without ENS symptoms, and 3) control participants...
February 22, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28219526/antifungal-activity-of-ionic-liquids-based-on-menthol-a-mechanism-study
#20
Jakub Suchodolski, Joanna Feder-Kubis, Anna Krasowska
The mechanism of toxicity of chiral ionic liquids with (1R,2S,5R)-(-)-menthol [Cn-Am-Men][Cl] (n=10, 11 or 12) in the fungus Candida albicans is reported here. Ionic liquids were more toxic towards Candida strain lacking all identified multidrug resistance efflux pumps. Moreover, the compounds tested inhibited C. albicans filamentation at the concentration at which detached fungal cells also adhered to the plastic surface. Our results showed the high activity of all the tested chiral ionic liquids in the permeabilization of C...
April 2017: Microbiological Research
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