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https://www.readbyqxmd.com/read/29145459/the-construction-of-ventilation-turrets-in-atta-vollenweideri-leaf-cutting-ants-carbon-dioxide-levels-in-the-nest-tunnels-but-not-airflow-or-air-humidity-influence-turret-structure
#1
Florian Halboth, Flavio Roces
Nest ventilation in the leaf-cutting ant Atta vollenweideri is driven via a wind-induced mechanism. On their nests, workers construct small turrets that are expected to facilitate nest ventilation. We hypothesized that the construction and structural features of the turrets would depend on the colony's current demands for ventilation and thus might be influenced by the prevailing environmental conditions inside the nest. Therefore, we tested whether climate-related parameters, namely airflow, air humidity and CO2 levels in the outflowing nest air influenced turret construction in Atta vollenweideri...
2017: PloS One
https://www.readbyqxmd.com/read/29144311/velocity-based-analysis-of-sediment-incipient-deposition-in-rigid-boundary-open-channels
#2
Hafzullah Aksoy, Mir Jafar Sadegh Safari, Necati Erdem Unal, Mirali Mohammadi
Drainage systems must be designed in a way to minimize undesired problems such as decrease in hydraulic capacity of the channel, blockage and transport of pollutants due to deposition of sediment. Channel design considering self-cleansing criteria are used to solve the sedimentation problem. Incipient deposition is one of the non-deposition self-cleansing design criteria that can be used as a conservative method for channel design. Experimental studies have been carried out in five different cross-section channels, namely trapezoidal, rectangular, circular, U-shape and V-bottom...
November 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29144131/twisting-and-tilting-1-1-bis-dialkylphosphino-ferrocene-bound-to-low-valent-tricarbonylmaganese-i-to-i
#3
K Michael Schäfer, Leonie Reinders, Jan Fiedler, Mark R Ringenberg
Recently we had reported the noninnocent behavior of 1,1'-bis(diphenylphosphino)ferrocene (dppf) in Fe(CO)3dppf [Ringenberg et al., Inorg. Chem., 2017, 56, 7501]. Moving to the left in the periodic table, HMn(CO)3(dRpf) where dRpf = dppf (1H) and 1,1'-bis(diisopropylphosphino)ferrocene (dippf) (2H) were synthesized. The hydride ligand was removed by protonation with [(Et2O)2H][B(Ar(F))4] ([B(Ar(F))4](-) = tetrakis[3,5-bis(trifluoromethyl)phenyl]borate), resulting in the rapid evolution of H2 followed by the formation of an Fe→Mn interaction...
November 16, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29143945/one-evidence-of-cocaine-and-amphetamine-regulated-transcript-cart-has-the-bidirectional-effects-on-appetite-in-siberian-sturgeon-acipenser-baerii
#4
Xin Zhang, Yundi Gao, Ni Tang, Jinwen Qi, Yuanbing Wu, Jin Hao, Shuyao Wang, Defang Chen, Zhiqiong Li
Cocaine- and amphetamine-regulated transcript (CART), discovered in 1995, with various biological functions, has received much attention recently due to its role in the regulation of appetite in mammals. However, the function of CART on the appetite control in fish species is still not very clear. In this study, Siberian sturgeon (Acipenser baerii Brandt) cart gene was cloned for the first time, and the cart mRNA levels in 11 feeding-related tissues was investigated. The Siberian sturgeon cart gene sequence was 1459 base pairs (bp), including a 3'-terminal untranslated region (3'-UTR) of 39 bp, a 5'-terminal untranslated region (5'-UTR) of 52 bp, and an open reading frame (ORF) of 348 bp encoding 115 amino acids...
November 16, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29143629/from-erasure-to-opportunity-a-qualitative-study-of-the-experiences-of-transgender-men-around-pregnancy-and-recommendations-for-providers
#5
Alexis Hoffkling, Juno Obedin-Maliver, Jae Sevelius
BACKGROUND: Some transgender men retain their uterus, get pregnant, and give birth. However, societal attitudes about gender have erected barriers to openly being pregnant and giving birth as a transgender man. Little research exists regarding transgender men's reproductive needs. Anecdotal observations suggest that social change and increasing empowerment of transgender men may result in increasing frequency and openness about pregnancy and birth. Specific needs around conception, pregnancy, and newborn care may arise from transphobia, exogenous testosterone exposure, or from having had (or desiring) gender-affirming surgery...
November 8, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29142999/highlights-from-faraday-discussion-fdsers17-surface-enhanced-raman-scattering-sers-glasgow-uk-30th-august-1st-september-2017
#6
G Di Martino, H Fleming, M Kamp, F Lussier
The 2017 Faraday Discussion on Surface Enhanced Raman Scattering (SERS) attracted more than a hundred delegates from a broad spectrum of backgrounds and experience levels, bringing together leading scientists involved in the long living field of SERS. The meeting gave an overview of the liveliness of the topic, characterised by open questions and fascinating science still to discover. In the following, we discuss the topics covered during this meeting and briefly highlight the content of each presentation.
November 16, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29142580/medical-education-journal-club-two-years-experience-at-king-saud-university
#7
Samina A Khan, Mona M Soliman
Objective: Medical Education Journal Club is an evidence-based approach to teach and learn critical appraisal techniques on available literature. This study evaluates the implementation and experience of two academic years of Journal club at Medical Education Department, King Saud University. Methods: We started JC in 2015 at medical education department, KSU. An invitation with a published paper and event poster were sent 2 weeks prior of the session to participants...
September 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29141882/transparent-anemone-shrimp-ancylomenes-pedersoni-become-opaque-after-exercise-and-physiological-stress-in-correlation-with-increased-hemolymph-perfusion
#8
Laura E Bagge, Stephen T Kinsey, Justin Gladman, Sönke Johnsen
Whole-body transparency, an effective camouflage strategy in many aquatic species, can be disrupted by environmental and/or physiological stressors. We found that tail-flip escape responses temporarily disrupt the transparency of the anemone shrimp Ancylomenes pedersoni After as few as three tail flips, the previously transparent abdominal muscle became cloudy. Eliciting additional tail flips to the point of exhaustion (16±1 s.e.m.; n=23) resulted in complete opacity, though the original transparency returned after 20-60 min of inactivity...
November 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29140977/low-cost-and-open-source-multi-fluorescence-imaging-system-for-teaching-and-research-in-biology-and-bioengineering
#9
Isaac Nuñez, Tamara Matute, Roberto Herrera, Juan Keymer, Timothy Marzullo, Timothy Rudge, Fernán Federici
The advent of easy-to-use open source microcontrollers, off-the-shelf electronics and customizable manufacturing technologies has facilitated the development of inexpensive scientific devices and laboratory equipment. In this study, we describe an imaging system that integrates low-cost and open-source hardware, software and genetic resources. The multi-fluorescence imaging system consists of readily available 470 nm LEDs, a Raspberry Pi camera and a set of filters made with low cost acrylics. This device allows imaging in scales ranging from single colonies to entire plates...
2017: PloS One
https://www.readbyqxmd.com/read/29140917/medical-trainees-experiences-of-treating-people-with-chronic-pain-a-lost-opportunity-for-medical-education
#10
Kathleen Rice, Jae Eun Ryu, Cynthia Whitehead, Joel Katz, Fiona Webster
PURPOSE: Evidence suggests that physicians' opinions about chronic pain patients become progressively negative over the course of medical training, leading to a decline in empathy for these patients. Few qualitative studies have focused on this issue and thus the experiences shaping this process remain unexplored. This study addressed how medical trainees learn about chronic pain management through informal and formal curricula. METHOD: This study adopted a descriptive qualitative interview-based approach informed by the theoretical lens of the hidden curriculum...
November 14, 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/29140913/sex-differences-in-aerobic-fitness-in-top-class-soccer-referees
#11
Carlo Castagna, Mario Bizzini, Stefano DʼOttavio, Susana C Araújo Póvoas
Castagna, C, Bizzini, M, D'Ottavio, S, and Araújo Póvoas, SC. Gender differences in aerobic fitness in top-class soccer referees. J Strength Cond Res XX(X): 000-000, 2017-The aim of this study was to assess the aerobic-fitness differences between male and female top-class soccer field referees (FRs). This with the purpose to provide cutoff values useful for training prescription in female FRs. Forty female top-class FRs (age 34.18 ± 3.50 years and 5 ± 3.9 years international refereeing experience) and 52 male FRs (age 38...
November 14, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29140564/%C3%AE-catenin-and-il-1%C3%AE-dependent-cxcl10-production-drives-progression-of-disease-in-a-mouse-model-of-congenital-hepatic-fibrosis
#12
Eleanna Kaffe, Romina Fiorotto, Francesca Pellegrino, Valeria Mariotti, Mariangela Amenduni, Massimiliano Cadamuro, Luca Fabris, Mario Strazzabosco, Carlo Spirli
Congenital Hepatic Fibrosis (CHF), a genetic disease caused by mutations in the PKHD1 gene, encoding for the protein fibrocystin (FPC), is characterized by biliary dysgenesis, progressive portal fibrosis, and by a PKA-mediated activating phosphorylation of β-Catenin at Ser675. Biliary structures of Pkhd1(del4/del4) mice, a mouse model of CHF, secrete CXCL10 a chemokine able to recruit macrophages. The aim of this study is to clarify whether CXCL10 plays a pathogenetic role in disease progression in CHF/CD and to understand the mechanisms leading to increased CXCL10 secretion...
November 15, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29140336/whispering-gallery-modes-in-a-liquid-filled-hollow-glass-microsphere
#13
Shuangqiang Liu, Bojian Shi, Yan Wang, Lugui Cui, Jun Yang, Weimin Sun, Hanyang Li
We develop a hydrofluoric (HF) etching process to open a microhole on the hollow glass microsphere (HGM). The typical whispering gallery mode (WGM) resonance was observed by coupling the HGM with a tapered fiber. Dioctyl phthalate was filled into the HGM, and the resonance wavelength decreased at elevated temperatures. We analyzed the WGM resonance properties inside the liquid-filled HGM with a higher or lower refractive index in comparison to the HGM wall. Four different liquids were also injected into the HGM to investigate the influence of the thermo-optic coefficient on the temperature sensitivity...
November 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/29140090/qm-mm-simulations-identify-the-ring-opening-mechanism-of-creatininase
#14
Jitrayut Jitonnom, Joni Mujika, Marc W van der Kamp, Adrian J Mulholland
Creatininase catalyzes the conversion of creatinine (a biosensor for kidney function) to creatine via a two-step mechanism: water-addition followed by ring-opening. Water-addition is common to other known cyclic amidohydrolases, but the precise mechanism for ring-opening is still under debate. The proton donor in this step is either His178, or a water molecule bound to one of metal ions, and the roles of His178 and Glu122 are unclear. Here, the two possible reaction pathways have been fully examined by means of combined quantum mechanics/molecular mechanics simulations at the SCC-DFTB/CHARMM22 level of theory...
November 15, 2017: Biochemistry
https://www.readbyqxmd.com/read/29138892/-partial-and-complete-joint-transplantation-with-fresh-osteochondral-allografts-the-flocsat-concept
#15
REVIEW
C Krettek, J-D Clausen, N Bruns, C Neunaber
Cartilage defects in adult patients do not heal well. Fresh osteochondral allograft (OCA) transplantation is based on mature, living, mechanically sound hyaline cartilage attached to a bone interface, which is brought into an osteochondral defect, where it becomes osseointegrated. According to current knowledge, intact hyaline cartilage tissue is immune privileged and does not, in contrast to bone, meniscus or ligaments, cause an immune reaction. The technique has the unique advantage of transplanting viable, mature and mechanically stable hyaline cartilage into the affected area...
November 14, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/29138776/photoelectron-spectroscopy-and-density-functional-theory-studies-of-fructose-h2o-n-n-1-5-anionic-clusters
#16
Zhen Zeng, Elliot R Bernstein
Photoelectron spectroscopy (PES) and density functional theory (DFT) based calculations are executed to characterize gas phase, isolated (fructose + (H2O)n)(-) (n = 1-5) anionic species produced using a matrix assisted laser desorption ionization (MALDI) method. Gas phase, isolated (fructose + (H2O)n)(-) (n = 1-5) cluster anions mainly exist as open chain structures with conformational and positional isomers in the present experiments. Some cyclic structures of (fructose + (H2O)n)(-) (n = 3, 4) are apparently present in the experiments and their VDEs can contribute to the lower energy shoulders of PES features observed for (fructose + (H2O)n)(-) (n = 3, 4)...
November 15, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29138539/patient-reported-benefits-from-patient-organization-magazines-and-internet-based-peer-support-in-m%C3%A3-ni%C3%A3-re-s-disease
#17
Vinaya Manchaiah, Ilmari Pyykkö, Jing Zou, Hilla Levo, Erna Kentala
Objectives: To facilitate self-help, the Finnish Ménière's Federation (FMF) provides various kinds of support to persons with Ménière's disease (MD), which includes patient magazines (PM) and Internet-based peer support (iPS). The current study aimed to evaluate the benefits reported by MD patients in terms of PM and iPS. Method: The study used a cross-sectional survey design with a mixture of structured and open-ended questions administered online. A sample of 185 patients from the FMF membership database provided complete data...
2017: Patient Preference and Adherence
https://www.readbyqxmd.com/read/29138449/haemodynamic-recovery-properties-of-the-torsioned-testicular-artery-lumen
#18
Selda Goktas, Ozlem Yalcin, Erhan Ermek, Senol Piskin, Can T Capraz, Yusuf O Cakmak, Kerem Pekkan
Testicular artery torsion (twisting) is one such severe vascular condition that leads spermatic cord injury. In this study, we investigate the recovery response of a torsioned ram testicular artery in an isolated organ-culture flow loop with clinically relevant twisting modes (90°, 180°, 270° and 360° angles). Quantitative optical coherence tomography technique was employed to track changes in the lumen diameter, wall thickness and the three-dimensional shape of the vessel in the physiological pressure range (10-50 mmHg)...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29138127/exploring-working-relationships-in-mental-health-care-via-an-e-recovery-portal-qualitative-study-on-the-experiences-of-service-users-and-health-providers
#19
Monica Strand, Deede Gammon, Lillian Sofie Eng, Cornelia Ruland
BACKGROUND: The quality of working relationships between service users and health providers is fundamental in the processes of recovery in mental health. How Internet-based interventions will influence these relationships for persons with long-term care needs, and the measures that can be taken to maintain and enhance working relationships through Internet, is still not well understood. OBJECTIVE: The aim of this study was to gain insights into how service users and health providers experience their working relationships when they are offered the option of supplementing ongoing collaboration with an e-recovery portal...
November 14, 2017: JMIR Mental Health
https://www.readbyqxmd.com/read/29137531/-i-honestly-would-not-have-known-what-to-do-an-exploratory-study-of-perspectives-on-client-suicide-among-vocational-rehabilitation-support-staff
#20
Emily M Lund, Jared C Schultz, Katie B Thomas, Michael R Nadorff, Christina M Sias, Dalia Chowdhury, Nicole R DeTore, Kate Galbraith
Despite the high prevalence of suicide both overall and among people with disabilities in particular, little research has explored suicide in the context of the vocational rehabilitation (VR) system or in counseling support staff in general. We analyzed the responses of 14 VR support staff who responded to an open-ended qualitative prompt regarding their experiences with suicide training and competency. Key themes included a perceived lack of and desire for more training regarding suicide, seeking and receiving suicide training outside of VR, and a perceived lack of resources for working with suicidal clients...
January 1, 2017: Omega
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