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https://www.readbyqxmd.com/read/29782921/flight-duration-and-flight-muscle-ultrastructure-of-unfed-hawk-moths
#1
Bernard W M Wone, Jaika Pathak, Goggy Davidowitz
Flight muscle breakdown has been reported for many orders of insects, but the basis of this breakdown in insects with lifelong dependence on flight is less clear. Lepidopterans show such muscle changes across their lifespans, yet how this change affects the ability of these insects to complete their life cycles is not well documented. We investigated the changes in muscle function and ultrastructure of unfed aging adult hawk moths (Manduca sexta). Flight duration was examined in young, middle-aged, and advanced-aged unfed moths...
May 18, 2018: Arthropod Structure & Development
https://www.readbyqxmd.com/read/29782813/actinomycotic-osteomyelitis-of-the-mandible-diagnosed-using-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-a-case-report
#2
Shinsuke Yamamoto, Hiroshi Takegawa, Naoki Taniike, Toshihiko Takenobu
Actinomycosis is a rare, chronic, slowly progressive granulomatous disease caused by filamentous gram-positive anaerobic bacteria from the Actinomycetaceae family (genus Actinomyces). It has become a rare condition because of the widespread use of antibiotics. When clinical symptoms are not typical, diagnosis of this condition becomes difficult. This report describes a case involving an 82-year-old woman who was diagnosed with actinomycotic osteomyelitis of the mandible using matrix assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS)...
April 26, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29782651/pharmacokinetic-and-metabolism-studies-of-bavachinin-through-ultra-high-performance-liquid-chromatography-coupled-with-electrospray-ionization-tandem-mass-spectrometry
#3
Jun Qian, Fan Xie, Yanhong Shi, Jinhang Li, Liuqiang Zhang, Yiming Li, Fujiang Guo, Rui Wang
Bavachinin (BVC), one of the main bioactive prenylated flavonoids derived from Psoralea corylifolia Linn, has a wide variety of pharmacological effects, such as antiangiogenic, antitumour, antiallergic, anti-inflammatory, and antibacterial activities, especially as a pan-peroxisome proliferator-activated receptors (PPARs) agonist. A rapid and sensitive method for quantifying BVC in rat plasma was developed and validated through ultra-high-performance liquid chromatography coupled with electrospray-ionization tandem mass spectrometry...
May 21, 2018: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29782605/trends-in-oncologic-hybrid-imaging
#4
REVIEW
Andreas G Wibmer, Hedvig Hricak, Gary A Ulaner, Wolfgang Weber
Hybrid imaging plays a central role in the diagnosis and management of a wide range of malignancies at all stages. In this article, we review the most pertinent historical developments, emerging clinical applications of novel radiotracers and imaging technologies, and potential implications for training and practice. This includes an overview of novel tracers for prostate, breast, and neuroendocrine tumors, assessment of tumor heterogeneity, the concept of image-guided 'biologically relevant dosing', and theranostic applications...
2018: Eur J Hybrid Imaging
https://www.readbyqxmd.com/read/29782576/self-represented-witnessing-the-use-of-social-media-by-asylum-seekers-in-australia-s-offshore-immigration-detention-centres
#5
Maria Rae, Rosa Holman, Amy Nethery
The act of witnessing connects audiences with distant suffering. But what happens when bearing witness becomes severely restricted? External parties, including the mainstream news media, are constrained from accessing Australia's offshore immigration detention centres. The effect is that people seeking asylum are hidden from the public and excluded from national debates. Some detainees have adopted social media as a platform to communicate their stories of flight, and their experiences of immigration detention, to a wider audience...
May 2018: Media, culture, and society
https://www.readbyqxmd.com/read/29782533/shared-responsibility-for-managing-fatigue-hearing-the-pilots
#6
Jennifer L Zaslona, Karyn M O'Keeffe, T Leigh Signal, Philippa H Gander
In commercial aviation, fatigue is defined as a physiological state of reduced mental or physical performance capability resulting from sleep loss, extended wakefulness, circadian phase, and/or workload. The International Civil Aviation Organisation mandates that responsibility for fatigue risk management is shared between airline management, pilots, and support staff. However, to date, the majority of research relating to fatigue mitigations in long range operations has focused on the mitigations required or recommended by regulators and operators...
2018: PloS One
https://www.readbyqxmd.com/read/29782482/trauma-patients-are-safe-to-fly-72-hours-after-tube-thoracostomy-removal
#7
David Zonies, Joel Elterman, Christopher Burns, Vincent Paul, John Oh, Jeremy Cannon
BACKGROUND: Current recommendations for safe air travel following traumatic pneumothorax are 2-3 weeks after radiographic resolution. These recommendations are based on several small observational studies and expert consensus which cite a theoretical risk of recurrence and hypoxia due to decreased oxygen tension at altitude. We sought to systematically study the timing of chest drain removal after traumatic pneumothorax and risk of recurrence in relation to air travel. METHODS: A retrospective cohort study of consecutively admitted patients who sustained a traumatic chest injury treated with tube thoracostomy over a 5-year period was undertaken...
May 18, 2018: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29781934/absolute-reliability-and-concurrent-validity-of-the-stryd-system-for-the-assessment-of-running-stride-kinematics-at-different-velocities
#8
Felipe García-Pinillos, Luis E Roche-Seruendo, Noel Marcén-Cinca, Luis A Marco-Contreras, Pedro A Latorre-Román
García-Pinillos, F, Roche-Seruendo, LE, Marcen-Cinca, N, Marco-Contreras, LA, and Latorre-Román, PA. Absolute reliability and concurrent validity of the Stryd system for the assessment of running stride kinematics at different velocities. J Strength Cond Res XX(X): 000-000, 2018-This study aimed to determine the absolute reliability and to evaluate the concurrent validity of the Stryd system for measuring spatiotemporal variables during running at different velocities (8-20 km·h) by comparing data with another widely used device (the OptoGait system)...
May 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29781217/uhplc-q-tof-ms-based-screening-and-identification-of-main-flavonoids-and-their-metabolites-in-rats-after-oral-administration-of-cirsium-japonicum-dc-extract
#9
Xia Zhang, Man Liao, Xiaoye Cheng, Caijuan Liang, Xinpeng Diao, Lantong Zhang
RATIONALE: Cirsium japonicum DC., a traditional Chinese medicine, has been shown to have antihemorrhagic and antitumour effects. Pharmacological studies have demonstrated that this curative effect may be related to flavonoids. The present work aims to screen and identify the main flavonoids and their corresponding metabolites in rats after oral administration of Cirsium japonicum DC. extract. METHODS: A rapid and simple ultra-high-performance liquid chromatography coupled with triple quadrupole and time-of-flight mass spectrometry (UHPLC-Q-TOF-MS/MS) method was developed for the identification of the primary absorbing components and metabolites of the principal flavonoids...
May 20, 2018: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/29779688/how-to-better-monitor-and-clean-irregular-surfaces-in-operating-rooms-insights-gained-by-using-both-atp-luminescence-and-rodac-assays
#10
Olivia Ellis, Hilary Godwin, Maren David, Dan J Morse, Romney Humphries, Daniel Z Uslan
BACKGROUND: A major limitation to developing evidence-based approaches to infection prevention is the paucity of real-time, quantitative methods for monitoring the cleanliness of environmental surfaces in clinical settings. One solution that has been proposed is adenosine triphosphate (ATP) bioluminescence assays, but this method does not provide information about the source of the ATP. MATERIALS/METHODS: To address this gap, we conducted a study in which ATP bioluminescence was coupled with traditional RODAC sampling and matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry to assess which organisms were viable and present...
May 17, 2018: American Journal of Infection Control
https://www.readbyqxmd.com/read/29778650/obesity-surgery-makes-patients-healthier-and-more-functional-real-world-results-from-the-united-kingdom-national-bariatric-surgery-registry
#11
Alexander Dimitri Miras, Kamocka Anna, Patel Darshan, Dexter Simon, Finlay Ian, Hopkins C James, Khan Omar, Reddy Marcus, Sedman Peter, Small Peter, Somers Shaw, Suzie Cro, Walton Peter, le Roux Carel W, Welbourn Richard
BACKGROUND: The National Bariatric Surgery Registry (NBSR) is the largest bespoke database in the field in the United Kingdom. OBJECTIVES: Our aim was to analyze the NBSR to determine whether the effects of obesity surgery on associated co-morbidities observed in small, randomized controlled clinical trials could be replicated in a "real life" setting within U.K. healthcare. SETTING: United Kingdom. METHODS: All NBSR entries for operations between 2000 and 2015 with associated demographic and co-morbidity data were analyzed retrospectively...
February 15, 2018: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/29777773/progress-in-formulation-development-and-sterilisation-of-freeze-dried-oligodeoxynucleotide-loaded-gelatine-nanoparticles
#12
Katharina J Geh, Madlen Hubert, Gerhard Winter
Oligodeoxynucleotide (ODN)-loaded gelatine nanoparticles (GNPs) have proven their outstanding potential in the treatment of allergic diseases such as equine asthma and canine atopic dermatitis, which are appropriate models for the corresponding human diseases. To encourage the development of a marketable product, long term stability and sterility needs to be ensured. In this work, we aimed to advance freeze-drying options to stabilise ODN-loaded GNPs. Matrix-assisted laser desorption/ionisation mass spectrometry time-of-flight was implemented as a versatile tool to assess ODN stability...
May 16, 2018: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/29776995/kinematic-control-of-male-allen-s-hummingbird-wing-trill-over-a-range-of-flight-speeds
#13
Christopher J Clark, Emily A Mistick
Wing trills are pulsed sounds produced by modified wing feathers at one or more specific points in time during a wingbeat. Male Allen's Hummingbird ( Selasphorus sasin ) produce a sexually dimorphic 9 kHz wing trill in flight. Here we investigate the kinematic basis for trill production. The wingtip velocity hypothesis posits that trill production is modulated by the airspeed of the wingtip at some point during the wingbeat, whereas the wing rotation hypothesis posits that trill production is instead modulated by wing rotation kinematics...
May 18, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29776994/first-demonstration-of-olfactory-learning-and-long-term-memory-in-honey-bee-queens
#14
Zhiwen Gong, Ken Tan, James C Nieh
As the primary source of colony reproduction, social insect queens play a vital role. However, the cognitive abilities of queens are not well understood, although queen learning and memory are essential in multiple species such as honey bees, in which virgin queens must leave the nest and then successful learn to navigate back over repeated nuptial flights. Honey bee queen learning has never been previously demonstrated. We therefore tested olfactory learning in queens and workers and examined the role of DNA methylation, which plays a key role in long term memory formation...
May 18, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29776952/activity-based-concept-to-screen-biological-matrices-for-opiates-and-synthetic-opioids
#15
Annelies Cannaert, Lakshmi Vasudevan, Melissa Friscia, Amanda L A Mohr, Sarah M R Wille, Christophe P Stove
BACKGROUND: Detection of new highly potent synthetic opioids is challenging as new compounds enter the market. Here we present a novel screening method for the detection of opiates and (synthetic) opioids based on their activity. METHODS: A cell-based system was set up in which activation of the μ -opioid receptor (MOR) led to recruitment of β-arrestin 2, resulting in functional complementation of a split NanoLuc luciferase and allowing readout via bioluminescence...
May 18, 2018: Clinical Chemistry
https://www.readbyqxmd.com/read/29776537/comparative-study-on-metabolite-level-in-tissue-specific-human-mesenchymal-stem-cells-by-an-ultra-performance-liquid-chromatography-quadrupole-time-of-flight-mass-spectrometry
#16
Seul Ji Lee, TacGhee Yi, Soo Hyun Ahn, Dong Kyu Lim, Si-Na Kim, Hyun-Joo Lee, Yun-Kyoung Cho, Jae-Yol Lim, Jong-Hyuk Sung, Jeong-Ho Yun, Johan Lim, Sun U Song, Sung Won Kwon
Mesenchymal stem cells (MSCs) are a promising therapeutic option for cell-based therapy due to their immunomodulatory and regenerative properties. They can be isolated from various adult tissues, including bone marrow, fat, dental tissue, and glandular tissue. Although they share common characteristics, little is known about the biological differences between MSC populations derived from different tissues. In this study, we used MS to compare the endogenous metabolite level in the human MSCs originating from the bone marrow, adipose tissue, periodontal ligaments, and salivary glands...
September 18, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29776363/rapid-detection-of-carbapenemase-activity-of-enterobacteriaceae-isolated-from-positive-blood-cultures-by-maldi-tof-ms
#17
Jiajia Yu, Jingxian Liu, Yuanrui Li, Jing Yu, Weinan Zhu, Ying Liu, Lisong Shen
BACKGROUND: Matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) has been proved to be a useful tool for identification of pathogens directly isolated from blood cultures in clinical microbiology laboratories. β-Lactam antibiotics are commonly used for treatment of bloodstream infections caused by Enterobacteriaceae strains, and carbapenem is the superlative class of β-lactam antibiotics. Since the carbapenem resistance rate of Enterobacteriaceae strains raised year by year, efficient detection of carbapenemase activity and timely delivery of carbapenem susceptibility reports of Enterobacteriaceae strains isolated from blood cultures is important for clinicians...
May 18, 2018: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/29775706/purification-and-characterization-of-an-organic-solvent-tolerant-and-detergent-stable-lipase-from-haloferax-mediterranei-cncmm-50101
#18
Siham Akmoussi-Toumi, Souad Khemili-Talbi, Imen Ferioune, Salima Kebbouche-Gana
The present study investigates the purification and biochemical characterization of an extracellular lipase (HML) from Haloarchaea Haloferax mediterranei strain ATS1, isolated from the Sebkha (Medea, Algeria). The pure protein was obtained with ammonium sulfate precipitation (40-70%)-dialysis and UNO Q-6 FPLC, and characterized biochemically. Matrix assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF/MS) analysis revealed that the purified enzyme was a monomer, with a molecular mass of 45,011...
May 15, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29775483/ldha-gene-is-associated-with-pigeon-survivability-during-racing-competitions
#19
Sherif Ramadan, Takeshi Miyake, Junichi Yamaura, Miho Inoue-Murayama
Pigeon racing is a popular sport worldwide. Pigeons are under continuous selection to improve speed, spatial orientation, and endurance during long flights. However, numerous genetic and non-genetic factors affect survivability and homing ability, making such traits difficult for breeders to control. Polymorphisms in the lactate dehydrogenase A gene (LDHA) likely affects pigeon racing and homing abilities, due to its role in physical and mental performance. Additionally, the adenylate cyclase activating polypeptide 1 gene (ADCYAP1) has been associated with physiological and behavioral shifts that occur during avian migration...
2018: PloS One
https://www.readbyqxmd.com/read/29775146/setting-pressure-can-change-the-size-and-shape-of-mri-artifacts-caused-by-adjustable-shunt-valves-a-study-of-the-4-newest-models
#20
Daiki Uchida, Yuki Amano, Hirokazu Nakatogawa, Takayuki Masui, Naoto Ando, Teiji Nakayama, Haruhiko Sato, Tetsuro Sameshima, Tokutaro Tanaka
OBJECTIVE Adjustable shunt valves that have been developed for the management of hydrocephalus all rely on intrinsically magnetic components, and artifacts with these valves on MRI are thus inevitable. The authors have previously reported that the shapes of shunt artifacts differ under different valve pressures with the proGAV 2.0 valve. In the present study the authors compared the size and shape of artifacts at different pressure settings with 4 new-model shunt valves. METHODS The authors attached 4 new models of MRI-resistant shunt valve to the temporal scalp of a healthy volunteer: the proGAV 2...
May 18, 2018: Journal of Neurosurgery
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