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https://www.readbyqxmd.com/read/28231637/preen-oil-and-bird-fitness-a-critical-review-of-the-evidence
#1
Gregorio Moreno-Rueda
The uropygial gland is a holocrine complex exclusive to birds that produces an oleaginous secretion (preen oil) whose function is still debated. Herein, I examine critically the evidence for the many hypotheses of potential functions of this gland. The main conclusion is that our understanding of this gland is still in its infancy. Even for functions that are considered valid by most researchers, real evidence is scarce. Although it seems clear that preen oil contributes to plumage maintenance, we do not know whether this is due to a role in reducing mechanical abrasion or in reducing feather degradation by keratinophilic organisms...
February 23, 2017: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/28231634/from-endogenous-to-exogenous-pattern-formation-invasive-plant-species-changes-the-spatial-distribution-of-a-native-ant
#2
Kevin Li, Yifan He, Susanna K Campbell, A Shawn Colborn, Eliot L Jackson, Austin Martin, Ivan V Monagan, Theresa Wei Ying Ong, Ivette Perfecto
Invasive species are a significant threat to global biodiversity, but our understanding of how invasive species impact native communities across space and time remains limited. Based on observations in an old field in Southeast Michigan spanning 35 years, our study documents significant impacts of habitat change, likely driven by the invasion of the shrub, Elaeagnus umbellata, on the nest distribution patterns and population demographics of a native ant species, Formica obscuripes. Landcover change in aerial photos indicates that E...
February 23, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28231323/even-good-bots-fight-the-case-of-wikipedia
#3
Milena Tsvetkova, Ruth García-Gavilanes, Luciano Floridi, Taha Yasseri
In recent years, there has been a huge increase in the number of bots online, varying from Web crawlers for search engines, to chatbots for online customer service, spambots on social media, and content-editing bots in online collaboration communities. The online world has turned into an ecosystem of bots. However, our knowledge of how these automated agents are interacting with each other is rather poor. Bots are predictable automatons that do not have the capacity for emotions, meaning-making, creativity, and sociality and it is hence natural to expect interactions between bots to be relatively predictable and uneventful...
2017: PloS One
https://www.readbyqxmd.com/read/28231029/unintended-insulin-pump-delivery-in-hyperbaric-conditions
#4
Federico Bertuzzi, Basilio Pintaudi, Matteo Bonomo, Fabio Garuti
AIMS/HYPOTHESIS: Unintended pump insulin delivery was reported to occur as a consequence of decreased atmospheric pressure, probably mediated by air bubble formation and the expansion of existing bubbles. This observation has been used to explain some hypoglycemic episodes occurring in patients on insulin pump treatment in between 1 and 1 h 45 min after the flight takeoff. New models of insulin pumps have been introduced in the market, most of them are waterproof certified. It is not clear if in these new pumps the influence of atmospheric pressure changes on the insulin delivery is still present...
February 23, 2017: Diabetes Technology & Therapeutics
https://www.readbyqxmd.com/read/28230987/urinary-antibiotics-of-pregnant-women-in-eastern-china-and-cumulative-health-risk-assessment
#5
Hexing Wang, Na Wang, Junhua Qian, Lingyun Hu, Peixin Huang, Meifang Su, Xin Yu, Chaowei Fu, Feng Jiang, Qi Zhao, Ying Zhou, Haijiang Lin, Gengsheng He, Yue Chen, Qingwu Jiang
Exposure to antibiotics during pregnancy can pose a systematic effect on human health. A few bio-monitoring studies have demonstrated an extensive exposure of children to antibiotics, but there is still lack of data for pregnant women. To assess the exposure of pregnant women to antibiotics and potential health risk, we investigated 536 pregnant women aged 16-42 years from two geographically different study sites in Eastern China in 2015. We measured 21 antibiotics of five categories (seven fluoroquinolones, three phenicols, four tetracyclines, three macrolides, and four sulfonamides) in urines by using the isotope dilution ultra-performance liquid chromatography coupled to quadrupole time of-flight mass spectrometry...
February 23, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28230966/increasing-peak-capacity-in-non-targeted-omics-applications-by-combining-full-scan-field-asymmetric-waveform-ion-mobility-spectrometry-with-liquid-chromatography-mass-spectrometry
#6
Kayleigh L Arthur, Matthew A Turner, James C Reynolds, Colin S Creaser
Full scan field asymmetric waveform ion mobility spectrometry (FAIMS) combined with liquid chromatography and mass spectrometry (LC-FAIMS-MS) is shown to enhance peak capacity for omics applications. A miniaturized FAIMS device capable of rapid compensation field scanning has been incorporated into an ultra-high performance liquid chromatography (UHPLC) and time-of-flight (TOF) mass spectrometry analysis, allowing the acquisition of full scan FAIMS and MS nested data sets within the timescale of a UHPLC peak...
February 23, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28230759/analysis-of-the-total-biflavonoids-extract-from-selaginella-doederleinii-by-hplc-qtof-ms-and-its-in-vitro-and-in-vivo-anticancer-effects
#7
Hong Yao, Bing Chen, Yanyan Zhang, Huigen Ou, Yuxiang Li, Shaoguang Li, Peiying Shi, Xinhua Lin
Selaginella doederleinii Hieron has been traditionally used as a folk antitumor herbal medicine in China. In this paper, the phytochemical components of the total biflavonoids extract from S. doederleinii were studied by using high-performance liquid chromatography coupled with electrospray ionization quadrupole time-of-flight mass spectrometry (HPLC-ESI-QTOF MS/MS) in negative ion mode, and their in vitro and in vivo anticancer effects were evaluated. Four types of biflavonoids from S. doederleinii, including IC3'-IIC8'', IC3'-IIC6'', IC3'-IIC3''', and C-O linked biflavonoids were examined originally using QTOF MS/MS...
February 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28230356/assessment-of-particle-pollution-from-jetliners-from-smoke-visibility-to-nanoparticle-counting
#8
Lukas Durdina, Benjamin T Brem, Ari Setyan, Frithjof Siegerist, Theo Rindlisbacher, Jing Wang
Aviation is a substantial and a fast growing emissions source. Besides greenhouse gases, aircraft engines emit black carbon (BC), a climate forcer and air pollutant. Aviation BC emissions have been regulated and estimated through exhaust smoke visibility (smoke number). Their impacts are poorly understood because emission inventories lack representative data. Here, we measured BC mass and number-based emissions of the most popular airliner's engines according to a new emission standard. We used a calibrated engine performance model to determine the emissions on the ground, at cruise altitude, and over entire flight missions...
February 23, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28230319/depletion-of-abundant-human-serum-proteins-by-per-se-imprinted-cryogels-based-on-sample-heterogeneity
#9
Chun Yang, Ya-Ru Liu, Yan Zhang, Jian Wang, Li-Li Tian, Ya-Nan Yan, Wei-Qin Cao, Yu-Yang Wang
Macroporous cryogels were prepared and used to deplete abundant proteins. It was accomplished based on the sample heterogeneity rather than any exogenous assistance. Human serum was added in monomer solutions to synthesize molecularly imprinted polymers (MIPs); therein some abundant proteins were imprinted in the polyacrylamide cryogels. Meanwhile the rare components remained aqueous. Chromatography and electrophoresis showed that albumin, serotransferrin and most globulins were depleted by columns packed with the MIPs...
February 23, 2017: Proteomics
https://www.readbyqxmd.com/read/28230216/molecular-aggregation-of-naphthalimide-organic-semiconductors-assisted-by-amphiphilic-and-lipophilic-interactions-a-joint-theoretical-and-experimental-study
#10
I Arrechea-Marcos, P de Echegaray, M J Mancheño, M C Ruiz Delgado, M M Ramos, J A Quintana, J M Villalvilla, M A Díaz-García, J T López Navarrete, R Ponce Ortiz, J L Segura
Amphiphilic and lipophilic donor-acceptor naphthalimide-oligothiophene assemblies exhibiting almost identical intramolecular properties, but differing in their intermolecular interactions, have been synthesized. Here we analyze the effect of replacing the normally used lipophilic alkyl chains with hydrophilic ones in directing molecular aggregation from an antiparallel to a parallel stacking. This different molecular packing of the amphiphilic, NIP-3TAmphi, and lipophilic, NIP-3TLipo, systems is assessed by electronic spectroscopies, scanning electronic microscopy and DFT quantum-chemical calculations...
February 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28228779/a-retrospective-study-on-screening-and-management-of-osteoporosis-in-breast-cancer-women-treated-with-aromatase-inhibitors-in-libya
#11
Hanan Saaddedin Abushwereb, M Elhabash, S Elhamshari, H Eshaefi
Negative health effects of aromatase inhibitors (AI) treatments on bones such as osteoporosis are evidenced. This impact of the aromatase inhibitors on bone. This study aimed to improve the medical assistance given to patients under AI treatment to minimize secondary osteoporosis. Fifty Libyan postmenopausal women treated with AI to fight breast cancer were selected from attendants Tripoli Medical Center (TMC), Oncology Department during year 2014. A closed questionnaire was requested from each women including data about age, age at AI therapy, and types of AI, age at bone densitometry measurement, onset and symptoms of osteoporosis, treatment of osteoporosis and measurement of vitamin D and calcium supplement given...
September 2016: Clinical Cases in Mineral and Bone Metabolism
https://www.readbyqxmd.com/read/28228494/an-evaluation-of-rgm-medium-for-isolation-of-nontuberculous-mycobacteria-from-respiratory-samples-from-patients-with-cystic-fibrosis-in-the-united-states
#12
Rongpong Plongla, Clair L Preece, John D Perry, Peter H Gilligan
A novel selective agar (RGM medium) has been advocated for the isolation of rapidly growing mycobacteria from the sputum of cystic fibrosis (CF) patients. The aim of this study was to compare RGM medium with Burkholderia cepacia selective agar (BCSA) and a standard AFB culture method for the isolation of nontuberculous mycobacteria (NTM) from patients with CF. The applicability of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) for identification of NTM isolated on RGM was also assessed...
February 22, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28228491/maldi-tof-alone-versus-maldi-tof-combined-with-real-time-antimicrobial-stewardship-interventions-on-time-to-optimal-antimicrobial-therapy-in-patients-with-positive-blood-cultures
#13
Maya Beganovic, Michael Costello, Sarah M Wieczorkiewicz
Introduction: Matrix-assisted laser desorption ionization time of flight (MALDI-TOF) decreases time to organism identification and improves clinical and financial outcomes. The purpose of this study was to evaluate the impact of MALDI-TOF alone vs MALDI-TOF combined with real-time, pharmacist-driven, antimicrobial stewardship (AMS) intervention on patient outcomes.Methods: This single-center, pre-post quasi-experimental study evaluated hospitalized patients with positive blood cultures identified via MALDI-TOF combined with prospective AMS intervention, compared to a control cohort with MALDI-TOF identification without AMS intervention...
February 22, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28228396/case-of-a-cerebral-abscess-caused-by-porphyromonas-gingivalis-in-a-subject-with-periodontitis
#14
Frederic Van der Cruyssen, Koenraad Grisar, Honorine Maes, Constantinus Politis
We report the case of a 65-year-old man presenting with generalised seizures after developing a right frontal brain abscess. Stereotactic aspiration and subsequent matrix assisted laser desorption/ionisation time-of-flight analyzer (MALDI-TOF) spectrometry revealed Porphyromonas gingivalis as the only causative anaerobe microorganism. Secondary incision and drainage was required due to neurological deterioration with increased dimensions of the abscess, intracranial pressure and formation of a subdural occipitoparietal empyema...
February 22, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28228343/ultrasound-guided-femoral-nerve-blockage-in-a-patellar-dislocation-an-effective-technique-for-emergency-physicians
#15
Sami Eksert, Sinan Akay, Murtaza Kaya, Ali Kantemir, Kenan Keklikci
BACKGROUND: Patellar dislocation is an orthopedic emergency and its reduction can be painful. The aim of this case is to show that the ultrasound-guided femoral nerve blockage can be effectively used in the pain management of patellar reduction in the emergency department (ED). CASE REPORT: A 21-year-old man was admitted to our ED after suffering a fall down a flight of stairs. The initial physical examination and plain radiography showed a patellar dislocation in the right knee...
February 19, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28228061/suicidal-plans-and-attempts-among-adolescents-in-mongolia
#16
Sarantsetseg Davaasambuu, Suvd Batbaatar, Susan Witte, Phillip Hamid, Maria A Oquendo, Marjorie Kleinman, Michael Olivares, Madelyn Gould
BACKGROUND: Although 75% of suicides occur in low- and middle-income countries, few studies have examined suicidal behaviors among young people in these countries. AIMS: This study aimed to examine what individual characteristics were associated with suicidal plans and attempts among Mongolian youth and whether suicidal risks and behaviors varied by urban and rural locations. METHOD: Logistic regression analyses were utilized to investigate suicidal plans and attempts among 5,393 adolescents using the Global Student Health Survey - 2013...
February 23, 2017: Crisis
https://www.readbyqxmd.com/read/28228024/mass-analyzed-threshold-ionization-spectroscopy-of-lanthanum-hydrocarbon-radicals-formed-by-c-h-bond-activation-of-propene
#17
Sudesh Kumari, Wenjin Cao, Dilrukshi Hewage, Ruchira Silva, Dong-Sheng Yang
La(C3H4) and La(C3H6) are observed from the reaction of laser-vaporized La atoms with propene by photoionization time-of-flight mass spectrometry and characterized by mass-analyzed threshold ionization spectroscopy. Two isomers of La(C3H4) are identified as methyl-lanthanacyclopropene [La(CHCCH3)] (Cs) and lanthanacyclobutene [La(CHCHCH2)] (C1); La(C3H6) is determined to be H-La(η(3)-allyl) (Cs), a C-H bond inserted species. All three metal-hydrocarbon radicals prefer a doublet ground state with a La 6s-based electron configuration...
February 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28227504/classification-of-pilot-induced-oscillations-during-in-flight-piloting-exercises-using-dry-eeg-sensor-recordings
#18
Clara A Scholl, Yu Mike Chi, Michael Elconin, William R Gray, Mark A Chevillet, Eric A Pohlmeyer, Clara A Scholl, Yu Mike Chi, Michael Elconin, William R Gray, Mark A Chevillet, Eric A Pohlmeyer, Yu Mike Chi, Mark A Chevillet, William R Gray, Eric A Pohlmeyer, Michael Elconin, Clara A Scholl
Pilot-Induced Oscillations (PIOs) are potentially hazardous piloting phenomena in which a pilot's control-inputs and the aircraft control-responses have (for any of a number of possible reasons) become out of phase. During PIOs, aggressive over-controlling on the part of the pilot in order to overcome a perceived lack of control can lead to complete loss of aircraft control. This study shows data recorded from a Cognionics dry electrode system during actual flight exercises can be used on a second-to-second basis to classify whether a pilot was undergoing a PIO event or if a PIO was imminent...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227361/kinect2-respiratory-movement-detection-study
#19
Sandy Rihana, Elie Younes, Dimitris Visvikis, Hadi Fayad, Sandy Rihana, Elie Younes, Dimitris Visvikis, Hadi Fayad, Sandy Rihana, Elie Younes, Dimitris Visvikis, Hadi Fayad
Radiotherapy is one of the main cancer treatments. It consists in irradiating tumor cells to destroy them while sparing healthy tissue. The treatment is planned based on Computed Tomography (CT) and is delivered over fractions during several days. One of the main challenges is replacing patient in the same position every day to irradiate the tumor volume while sparing healthy tissues. Many patient positioning techniques are available. They are both invasive and not accurate performed using tattooed marker on the patient's skin aligned with a laser system calibrated in the treatment room or irradiating using X-ray...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226935/the-hybrid-bio-inspired-aerial-vehicle-concept-and-simscape-flight-simulation
#20
Tao Zhang, Steven Su, Hung T Nguyen, Tao Zhang, Steven Su, Hung T Nguyen, Steven Su, Tao Zhang, Hung T Nguyen
This paper introduces a Silver Gull-inspired hybrid aerial vehicle, the Super Sydney Silver Gull (SSSG), which is able to vary its structure, under different manoeuvre requirements, to implement three flight modes: the flapping wing flight, the fixed wing flight, and the quadcopter flight (the rotary wing flight of Unmanned Air Vehicle). Specifically, through proper mechanism design and flight mode transition, the SSSG can imitate the Silver Gull's flight gesture during flapping flight, save power consuming by switching to the fixed wing flight mode during long-range cruising, and hover at targeted area when transferring to quadcopter flight mode...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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