keyword
MENU ▼
Read by QxMD icon Read
search

Flight

keyword
https://www.readbyqxmd.com/read/28931144/the-incidence-of-breast-cancer-among-female-flight-attendants-an-updated-meta-analysis
#1
Vilhjalmur Rafnsson
No abstract text is available yet for this article.
September 1, 2017: Journal of Travel Medicine
https://www.readbyqxmd.com/read/28930875/the-kinetic-determinants-of-reactive-strength-in-highly-trained-sprint-athletes
#2
Jamie Douglas, Simon Pearson, Angus Ross, Mike McGuigan
The purpose of this study was to determine the braking and propulsive phase kinetic variables underpinning reactive strength in highly trained sprint athletes in comparison to a non-sprint trained control group. Twelve highly trained sprint athletes and twelve non-sprint trained participants performed drop jumps (DJs) from 0.25m, 0.50m and 0.75m onto a force plate. One familiarization session was followed by an experimental testing session within the same week. Reactive strength index (RSI), contact time, flight time, and leg stiffness were determined...
September 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28929549/uplc-qtof-ms-e-based-diagnostic-product-ion-filtering-to-unveil-unstable-c6-c2-glucoside-conjugates-in-forsythia-suspensa
#3
Yong-Gang Xia, Jun Liang, Xin-Dong Guo, Hui-Min Sun, Hai-Xue Kuang
Forsythia suspensa contains C6 -C2 glucoside conjugates (CCGCs) that are chemically unstable, thereby hindering their isolation and purification. In the present study, ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-QTOF) was utilized to screen and identify unstable CCGCs in the fruits and leaves of F. suspensa without any tedious isolation and purified process based on independent information acquisition (also called MS(E) ) and individual MS/MS experiments. Diagnostic product ion filtering (DPIF) was further applied to mine unknown analogs in MS(E) high energy levels based on characteristic m/z of key substructures...
September 20, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28928504/bioactivity-based-antioxidative-components-screening-and-evaluation-in-grape-seed-proanthocyanidin-extract
#4
Jie Gao, Shengtao Lv, Changzhi Li, Jin Tao, Chengqi Jia, Min Jiang, Yuanyuan Hou, Xiaotao Hou, Jiagang Deng, Gang Bai
Grape seed proanthocyanidin extract (GSPE), a type of functional food, possesses potent antioxidant activity. In this study, GSPE protected human embryonic kidney 293 (HEK 293) cells from H2O2-induced cell injury and oxidative stress in a dose-dependent manner. The key effective constituents that exerted the most potent antioxidative activity in GSPE were screened by using a modified ultra-performance liquid chromatography quadrupole time-of-flight mass spectrometry (UPLC-Q/TOF MS) integrated 2,2'-azinobis(3-ethylbenzothiazoline)-6-sulfonic acid (ABTS) radical cation antioxidative activity analysis system...
August 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28927826/developmental-plasticity-and-stability-in-the-tracheal-networks-supplying-drosophila-flight-muscle-in-response-to-rearing-oxygen-level
#5
Jon F Harrison, James S Waters, Taylor A Biddulph, Aleksandra Kovacevic, C Jaco Klok, John J Socha
While it is clear that the insect tracheal system can respond in a compensatory manner to both hypoxia and hyperoxia, there is substantial variation in how different parts of the system respond. However, the response of tracheal structures, from the tracheoles to the largest tracheal trunks, have not been studied within one species. In this study, we examined the effect of larval/pupal rearing in hypoxia, normoxia, and hyperoxia (10, 21 or 40 kPa oxygen) on body size and the tracheal supply to the flight muscles of Drosophila melanogaster, using synchrotron radiation micro-computed tomography (SR-µCT) to assess flight muscle volumes and the major tracheal trunks, and confocal microscopy to assess the tracheoles...
September 16, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28927724/empirical-evidence-for-the-relationship-between-cognitive-workload-and-attentional-reserve
#6
Kyle J Jaquess, Rodolphe J Gentili, Li-Chuan Lo, Hyuk Oh, Jing Zhang, Jeremy C Rietschel, Matthew W Miller, Ying Ying Tan, Bradley D Hatfield
While the concepts of cognitive workload and attentional reserve have been thought to have an inverse relationship for some time, such a relationship has never been empirically tested. This was the purpose of the present study. Aspects of the electroencephalogram were used to assess both cognitive workload and attentional reserve. Specifically, spectral measures of cortical activation were used to assess cognitive workload, while amplitudes of the event-related potential from the presentation of unattended "novel" sounds were used to assess attentional reserve...
September 16, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28927488/investigation-of-the-antifatigue-effects-of-korean-ginseng-on-professional-athletes-by-gas-chromatography-time-of-flight-mass-spectrometry-based-metabolomics
#7
Bei Yan, Yao Liu, Aixin Shi, Zhihong Wang, Jiye Aa, Xiaoping Huang, Yi Liu
Ginseng is usually used for alleviating fatigue. The purpose of this paper was to evaluate the regulatory effect of Korean ginseng on the metabolic pattern in professional athletes, and, further, to explore the underlying mechanism of the antifatigue effect of Korean ginseng. GC-time-of-flight-MS was used to profile serum samples from professional athletes before training and after 15 and 30 day training, and professional athletes administered with Korean ginseng in the meanwhile. Biochemical parameters of all athletes were also analyzed...
September 19, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28927258/a-proteomics-based-approach-reveals-differential-regulation-of-visceral-adipose-tissue-proteins-between-metabolically-healthy-and-unhealthy-obese-patients
#8
Assim A Alfadda, Afshan Masood, Mohammed Y Al-Naami, Pierre Chaurand, Hicham Benabdelkamel
Obesity and the metabolic disorders that constitute metabolic syndrome are a primary cause of morbidity and mortality in the world. Nonetheless, the changes in the proteins and the underlying molecular pathways involved in the relevant pathogenesis are poorly understood.In this study a proteomic analysis of the visceral adipose tissue isolated from metabolically healthy and unhealthy obese patients was used to identify presence of altered pathway(s) leading to metabolic dysfunction. Samples were obtained from 18 obese patients undergoing bariatric surgery and were subdivided into two groups based on the presence or absence of comorbidities as defined by the International Diabetes Federation...
September 20, 2017: Molecules and Cells
https://www.readbyqxmd.com/read/28926305/structural-relationships-among-the-revised-reinforcement-sensitivity-theory-and-grandiose-and-vulnerable-narcissism
#9
Christopher C Spencer, Joshua D Foster, Jeffrey S Bedwell
Research shows that grandiosity and vulnerability are distinct aspects of narcissism. The Contemporary Clinical Model (CCM) of narcissism suggests that individuals fluctuate between grandiose narcissism (GN) and vulnerable narcissism (VN). The authors examine the relative contributions of the Behavioral Approach System (BAS), the Behavioral Inhibition System (BIS), and the Fight-Flight-Freeze System (FFFS) in the Revised Reinforcement Sensitivity Theory of Personality (r-RST) to GN and VN. Few studies examine the r-RST, and even fewer examine the VN and GN distinction...
September 19, 2017: Journal of Personality Disorders
https://www.readbyqxmd.com/read/28926234/using-ultra-performance-liquid-chromatography-quadrupole-time-of-flight-mass-spectrometry-based-chemometrics-for-the-identification-of-anti-angiogenic-biflavonoids-from-edible-garcinia-species
#10
Ping Li, Grace Gar-Lee Yue, Hin-Fai Kwok, Chun-Lin Long, Clara Bik-San Lau, Edward J Kennelly
Garcinia xanthochymus fruits are edible and also used in traditional medicine. Our previous work showed that the isolated natural products from G. xanthochymus fruits have displayed antioxidant activity and cytotoxicity in the colon cancer cells. In this study, we developed a strategy to correlate a zebrafish angiogenesis assay with ultra-performance liquid chromatography quadrupole time of flight mass spectrometry-based chemometric analysis to identify potential anti-angiogenic activity compounds from G. xanthochymus fruits...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28926221/fourier-transform-ms-and-closed-path-multi-reflection-time-of-flight-ms-using-an-electrostatic-linear-ion-trap
#11
Eric T Dziekonski, Joshua T Johnson, Kenneth W Lee, Scott A McLuckey
An electrostatic linear ion trap (ELIT) has been configured to allow for the simultaneous acquisition of mass spectra via Fourier transform (FT) techniques (frequency measurement) and via time-of-flight (TOF) (time measurement). In the former case, the time-domain image charge derived from a pick-up electrode in the field-free region of the ELIT is converted to frequency-domain data via Fourier transformation (i.e., FT-ELIT MS). In the latter case, the time difference between ion injection into the ELIT and ion detection after release from the ELIT using a micro-channel plate (MCP) enables the acquisition of multi-reflection time-of-flight mass spectra (MR-TOF MS)...
September 19, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28926203/qualitative-and-quantitative-analysis-of-chemical-constituents-in-ardisiae-japonicae-herba
#12
Ke-Yun Yu, Wen Gao, Shang-Zhen Li, Wei Wu, Pei Li, Li-Li Dou, Yuan-Zhong Wang, E-Hu Liu
Ardisiae Japonicae Herba is a well-known traditional Chinese medicine for the treatment of bronchitis conjunctivitis, pneumonia and trauma. In this work, a high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry method was firstly established for the separation and structural identification of the chemical constituents in Ardisiae Japonicae Herba. A total of 15 compounds including coumarins, flavonoid glycosides, and catechins were identified or tentatively characterized based on their chromatographic behaviors and mass spectral fragmentation and by comparisons with the reference standards...
September 19, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28925692/occurrence-of-natural-mixed-halogenated-dibenzo-p-dioxins-specific-distribution-and-profiles-in-mussels-from-seto-inland-sea-japan
#13
Akitoshi Goto, Nguyen Minh Tue, Masayuki Someya, Tomohiko Isobe, Shin Takahashi, Shinsuke Tanabe, Tatsuya Kunisue
In addition to unintentional formation of polychlorinated (PCDD/Fs), polybrominated (PBDD/Fs) and mixed halogenated (PXDD/Fs) dibenzo-p-dioxins/dibenzofurans during industrial activities, recent studies have shown that several PBDD and PXDD congeners can be produced by marine algal species from the coastal environment. However, multiple exposure status of anthropogenic and naturally-derived dioxins in marine organisms remains unclear. The present study examined the occurrence, geographical distribution and potential sources of PCDD/Fs, PBDD/Fs and PXDD/Fs using mussels and brown algae collected in 2012 from Seto Inland Sea, Japan...
September 19, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28925517/differences-in-protein-expression-among-five-species-of-stream-stonefly-plecoptera-along-a-latitudinal-gradient-in-japan
#14
Maribet Gamboa, Maria Claret Tsuchiya, Suguru Matsumoto, Hisato Iwata, Kozo Watanabe
Proteome variation among natural populations along an environmental gradient may provide insights into how the biological functions of species are related to their local adaptation. We investigated protein expression in five stream stonefly species from four geographic regions along a latitudinal gradient in Japan with varying climatic conditions. The extracted proteins were separated by two-dimensional gel electrophoresis and identified by matrix-assisted laser desorption/ionization of time-of-flight (MALDI TOF/TOF), yielding 446 proteins...
September 19, 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28925156/-plant-metabolomics-approach-for-age-discrimination-of-mountain-cultivated-ginseng-using-uplc-q-tof-ms
#15
Xiang-Wei Chang, Bo-Ran Wang, Tong Wang, De-Kun Li, Ying Zhao, Yu-Ling Zhang, Da-Zheng Zhou, Zheng-Liang Ye
Growth year is one of the important factors for the quality of mountain cultivated ginseng (MCG). For age differentiation of MCG, rhizome extracts of ginseng aged from 11 to 15 years were analyzed using a non-targeted approach with ultra-performance liquid chromatography/quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF/MS)-based on plant metabolomics technique. Multivariate statistical methods such as principal component analysis (PCA) and orthogonal partial least squared discrimination analysis (OPLS-DA) were used to compare the derived patterns among the samples...
October 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28925005/simultaneous-qualitative-and-quantitative-analyses-of-triterpenoids-in-ilex-pubescens-by-ultra-high-performance-liquid-chromatography-coupled-with-quadrupole-time-of-flight-mass-spectrometry
#16
Di Cao, Qing Wang, Jing Jin, Maosong Qiu, Lian Zhou, Xinghong Zhou, Hui Li, Zhongxiang Zhao
INTRODUCTION: Ilex pubescens Hook et Arn mainly contains triterpenoids that possess antithrombotic, anti-inflammatory and analgesic effects. Quantitative and qualitative analyses of the triterpenoids in I. pubescens can be useful for determining the authenticity and quality of raw materials and guiding its clinical preparation. OBJECTIVES: To establish a method for rapid and comprehensive analysis of triterpenoids in I. pubescens using ultra-high-performance liquid chromatography coupled to electrospray ionisation and quadrupole time-of-flight-mass spectrometry (UPLC-ESI-QTOF-MS), which will also be applied to evaluate the contents of nine triterpenoids among root, root heartwood and root bark of I...
September 18, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28923505/subcutaneous-infection-by-graphium-basitruncatum-in-a-heart-transplant-patient
#17
Analía L Fernández, Patricia O Andres, Cecilia H Veciño, Claudia B Nagel, María Teresa Mujica
Graphium basitruncatum, a synanamorph of Pseudoallescheria has been rarely reported in human infections. We report a case of subcutaneous phaeohyphomycosis caused by this fungus in a heart transplant recipient. We also describe the phenotypic, molecular methods and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) used to achieve isolate identification.
September 15, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28923167/cyclic-bouts-of-extreme-bradycardia-counteract-the-high-metabolism-of-frugivorous-bats
#18
M Teague O'Mara, Martin Wikelski, Christian C Voigt, Andries Ter Maat, Henry S Pollock, Gary Burness, Lanna M Desantis, Dina Kn Dechmann
Active flight requires the ability to efficiently fuel bursts of costly locomotion while maximizing energy conservation during non-flying times. We took a multi-faceted approach to estimate how fruit-eating bats (Uroderma bilobatum) manage a high-energy lifestyle fueled primarily by fig juice. Miniaturized heart rate telemetry shows that they use a novel, cyclic, bradycardic state that reduces daily energetic expenditure by 10% and counteracts heart rates as high as 900 bpm during flight. Uroderma bilobatum support flight with some of the fastest metabolic incorporation rates and dynamic circulating cortisol in vertebrates...
September 19, 2017: ELife
https://www.readbyqxmd.com/read/28923151/eugene-coler-flight-surgeon-and-world-war-i-ace
#19
Rick Allnutt
No abstract text is available yet for this article.
October 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28923150/you-re-the-flight-surgeon
#20
(no author information available yet)
McCoy RP. You're the flight surgeon: myxopapillary ependymoma. Aersop Med Hum Perform. 2017; 88(10):970-973.
October 1, 2017: Aerospace Medicine and Human Performance
keyword
keyword
3884
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"