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https://www.readbyqxmd.com/read/27751859/abnormal-dynamics-of-cortical-resting-state-functional-connectivity-in-chronic-headache-patients
#1
Zewei Wang, Qing Yang, Li Min Chen
The goals of this study are to characterize the temporal dynamics of inter-regional connectivity of the brain in chronic headache (CH) patients versus their age/gender matched controls (CONCH, n=28 pairs), and to determine whether dynamic measures reveal additional features to static functional connectivity and correlate with psychometric scores. Cortical thickness and inter-regional resting state fMRI connectivity were quantified and compared between CH and CONCH groups. Six cortical regions of interest (ROI) pairs that exhibited correlated cortical thickness and static functional connectivity abnormalities were selected for temporal dynamic analysis...
October 14, 2016: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/27703275/seven-365-million-year-old-trilobites-moulting-within-a-nautiloid-conch
#2
Rui-Wen Zong, Ruo-Ying Fan, Yi-Ming Gong
A nautiloid conch containing many disarticulated exoskeletons of Omegops cornelius (Phacopidae, Trilobita) was found in the Upper Devonian Hongguleleng Formation of the northwestern margin of the Junggar Basin, NW China. The similar number of cephala, thoraces and pygidia, unbroken thoraces, explicit exuviae, and lack of other macrofossils in the conch, indicate that at least seven individual trilobites had moulted within the nautiloid living chamber, using the vacant chamber of a dead nautiloid as a communal place for ecdysis...
October 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27694527/videomicroscopy-as-a-tool-for-investigation-of-the-microcirculation-in-the-newborn
#3
Ian M R Wright, Joanna L Latter, Rebecca M Dyson, Chris R Levi, Vicki L Clifton
The perinatal period remains a time of significant risk of death or disability. Increasing evidence suggests that this depends on microcirculatory behavior. Sidestream dark-field orthogonal polarized light videomicroscopy (OPS) has emerged as a useful assessment of adult microcirculation but the values derived are not delineated for the newborn. We aimed to define these parameters in well term newborn infants. Demographic details were collected prospectively on 42 healthy term neonates (n = 20 females, n = 22 males)...
October 2016: Physiological Reports
https://www.readbyqxmd.com/read/27064705/nutritional-studies-of-the-edible-seaweed-porphyra-tenera-ii-nutrition-of-conchocelis-1
#4
H Iwasaki
The nutrition of the free-living phase of Conchocelis of P. tenera was studied axenically. Conch-ocelis preferred NO3 , as nitrogen source. Urea and NH4 in low concentration, asparagine, and lysine were very good N sources. Several other amino acids were also utilized but growth was less abundant. Inorganic and organic phosphates were utilized; they were required at relatively low concentrations. Glycerophosphate gave excellent growth in a comparatively wide range of concentrations (0.1-5 mg P %). The optimal Ca concentration was 10-100 mg %...
March 1967: Journal of Phycology
https://www.readbyqxmd.com/read/27033950/a-multilocus-molecular-phylogeny-of-fasciolariidae-neogastropoda-buccinoidea
#5
Diogo R Couto, Philippe Bouchet, Yuri I Kantor, Luiz R L Simone, Gonzalo Giribet
The neogastropod family Fasciolariidae Gray, 1853 - tulips, horse-conchs, spindles, etc., comprises important representatives of tropical and subtropical molluscan assemblages, with over 500 species in the subfamilies Fasciolariinae Gray, 1853, Fusininae Wrigley, 1927 and Peristerniinae Tryon, 1880. Fasciolariids have had a rather complicated taxonomical history, with several genus names for a long time used as waste baskets to group many unrelated species; based on shell characters, recent taxonomic revisions have, however, began to set some order in its taxonomy...
June 2016: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/27033012/transcutaneous-vagus-nerve-stimulation-tvns-for-treatment-of-drug-resistant-epilepsy-a-randomized-double-blind-clinical-trial-cmpse02
#6
S Bauer, H Baier, C Baumgartner, K Bohlmann, S Fauser, W Graf, B Hillenbrand, M Hirsch, C Last, H Lerche, T Mayer, A Schulze-Bonhage, B J Steinhoff, Y Weber, A Hartlep, F Rosenow, H M Hamer
BACKGROUND: Various brain stimulation techniques are in use to treat epilepsy. These methods usually require surgical implantation procedures. Transcutaneous vagus nerve stimulation (tVNS) is a non-invasive technique to stimulate the left auricular branch of the vagus nerve at the ear conch. OBJECTIVE: We performed a randomized, double-blind controlled trial (cMPsE02) to assess efficacy and safety of tVNS vs. control stimulation in patients with drug-resistant epilepsy...
May 2016: Brain Stimulation
https://www.readbyqxmd.com/read/26994373/risk-assessment-in-ramps-for-heavy-vehicles-a-french-study
#7
Veronique Cerezo, Florence Conche
This paper presents the results of a study dealing with the risk for heavy vehicles in ramps. Two approaches are used. On one hand, statistics are applied on several accidents databases to detect if ramps are more risky for heavy vehicles and to define a critical value for longitudinal slope. χ(2) test confirmed the risk in ramps and statistical analysis proved that a longitudinal slope superior to 3.2% represents a higher risk for heavy vehicles. On another hand, numerical simulations allow defining the speed profile in ramps for two types of heavy vehicles (tractor semi-trailer and 2-axles rigid body) and different loads...
June 2016: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/26895025/chemical-tools-of-octopus-maya-during-crab-predation-are-also-active-on-conspecifics
#8
Dawrin Pech-Puch, Honorio Cruz-López, Cindy Canche-Ek, Gabriela Campos-Espinosa, Elpidio García, Maite Mascaro, Carlos Rosas, Daniel Chávez-Velasco, Sergio Rodríguez-Morales
Octopus maya is a major socio-economic resource from the Yucatán Peninsula in Mexico. In this study we report for the first time the chemical composition of the saliva of O. maya and its effect on natural prey, i.e. the blue crab (Callinectes sapidus), the crown conch snail (Melongena corona bispinosa), as well as conspecifics. Salivary posterior glands were collected from octopus caught by local fishers and extracted with water; this extract paralyzed and predigested crabs when it was injected into the third pereiopod...
2016: PloS One
https://www.readbyqxmd.com/read/26883846/nanotwin-governed-toughening-mechanism-in-hierarchically-structured-biological-materials
#9
Yoon Ah Shin, Sheng Yin, Xiaoyan Li, Subin Lee, Sungmin Moon, Jiwon Jeong, Minhyug Kwon, Seung Jo Yoo, Young-Min Kim, Teng Zhang, Huajian Gao, Sang Ho Oh
As a natural biocomposite, Strombus gigas, commonly known as the giant pink queen conch shell, exhibits outstanding mechanical properties, especially a high fracture toughness. It is known that the basic building block of conch shell contains a high density of growth twins with average thickness of several nanometres, but their effects on the mechanical properties of the shell remain mysterious. Here we reveal a toughening mechanism governed by nanoscale twins in the conch shell. A combination of in situ fracture experiments inside a transmission electron microscope, large-scale atomistic simulations and finite element modelling show that the twin boundaries can effectively block crack propagation by inducing phase transformation and delocalization of deformation around the crack tip...
2016: Nature Communications
https://www.readbyqxmd.com/read/26880557/non-canonical-antagonism-of-pi3k-by-the-kinase-itpkb-delays-thymocyte-%C3%AE-selection-and-renders-it-notch-dependent
#10
Luise Westernberg, Claire Conche, Yina Hsing Huang, Stephanie Rigaud, Yisong Deng, Sabine Siegemund, Sayak Mukherjee, Lyn'Al Nosaka, Jayajit Das, Karsten Sauer
β-selection is the most pivotal event determining αβ T cell fate. Here, surface-expression of a pre-T cell receptor (pre-TCR) induces thymocyte metabolic activation, proliferation, survival and differentiation. Besides the pre-TCR, β-selection also requires co-stimulatory signals from Notch receptors - key cell fate determinants in eukaryotes. Here, we show that this Notch-dependence is established through antagonistic signaling by the pre-TCR/Notch effector, phosphoinositide 3-kinase (PI3K), and by inositol-trisphosphate 3-kinase B (Itpkb)...
2016: ELife
https://www.readbyqxmd.com/read/26868567/fortification-of-dark-chocolate-with-spray-dried-black-mulberry-morus-nigra-waste-extract-encapsulated-in-chitosan-coated-liposomes-and-bioaccessability-studies
#11
Mine Gültekin-Özgüven, Ayşe Karadağ, Şeyma Duman, Burak Özkal, Beraat Özçelik
Fine-disperse anionic liposomes containing black mulberry (Morus nigra) extract (BME) were prepared by high pressure homogenization at 25,000 psi. Primary liposomes were coated with cationic chitosan (0.4, w/v%) using the layer-by-layer depositing method and mixed with maltodextrin (MD) (20, w/v%) prior to spray drying. After that, spray dried liposomal powders containing BME were added to chocolates with alkalization degrees (pH 4.5, 6, 7.5) at conching temperatures of 40 °C, 60 °C, and 80 °C. The results showed that, compared to spray dried extract, chitosan coated liposomal powders provided better protection of anthocyanin content in both increased temperature and pH...
June 15, 2016: Food Chemistry
https://www.readbyqxmd.com/read/26788007/variation-of-total-aroma-and-polyphenol-content-of-dark-chocolate-during-three-phase-of-conching
#12
F Albak, A R Tekin
Variation in the volatiles, total polyphenol, theobromine and caffein was investigated both qualitatively and quantitatively for all phases of conching with GC/MS/SPME, HPLC, GC/O, and UV-visible spectrophotometry. The volatile compounds being identified during the three phases consisted of aldehydes, ketones, pyrazines, acids, alcohols and esters. The number and concentration of these compounds were observed to be 31-25,681 ppb, 44-34,838 ppb and 44-29,809 ppb in the dry, pasty, and liquid phases respectively...
January 2016: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/26776034/polycyclic-aromatic-hydrocarbons-formation-and-occurrence-in-processed-food
#13
REVIEW
Lochan Singh, Jay G Varshney, Tripti Agarwal
Polycyclic aromatic hydrocarbons (PAHs) emerged as an important contaminant group in a gamut of processed food groups like dairy, nuts, herbs, beverages, meat products etc. Different cooking processes and processing techniques like roasting, barbecuing, grilling, smoking, heating, drying, baking, ohmic-infrared cooking etc. contribute towards its formation. The level of PAHs depends on factors like distance from heat source, fuel used, level of processing, cooking durations and methods, whereas processes like reuse, conching, concentration, crushing and storage enhance the amount of PAHs in some food items...
May 15, 2016: Food Chemistry
https://www.readbyqxmd.com/read/26690049/assessment-of-four-calculation-methods-proposed-by-the-ec-for-waste-hazardous-property-hp-14-ecotoxic
#14
Pierre Hennebert, Nicolas Humez, Isabelle Conche, Ian Bishop, Flore Rebischung
Legislation published in December 2014 revised both the List of Waste (LoW) and amended Appendix III of the revised Waste Framework Directive 2008/98/EC; the latter redefined hazardous properties HP 1 to HP 13 and HP 15 but left the assessment of HP 14 unchanged to allow time for the Directorate General of the Environment of the European Commission to complete a study that is examining the impacts of four different calculation methods for the assessment of HP 14. This paper is a contribution to the assessment of the four calculation methods...
February 2016: Waste Management
https://www.readbyqxmd.com/read/26672332/-determination-of-amino-acids-in-pearl-powder-and-conch-powder-from-different-origins-by-hplc-with-pre-column-derivation
#15
Jia Chen, Feng Wei, Xian-long Cheng, Wei Liu, Shuang-cheng Ma
OBJECTIVE: To establish an analysis method for determination of amino acids in pearl powder and conch powder from different origins by HPLC with pre-column derivation. METHODS: Hydrolytic amino acids were extracted by acid hydrolysis method,then derivatized with phenyl isothiocyanate (PITC). And the samples were analyzed on a C, column with gradient elution of 0.1 mol/L sodium acetate solution (adjusted to pH 6. 5) (A) and acetonitrile (B) at the flow rate of 1...
April 2015: Zhong Yao Cai, Zhongyaocai, Journal of Chinese Medicinal Materials
https://www.readbyqxmd.com/read/26590272/tuning-chocolate-flavor-through-development-of-thermotolerant-saccharomyces-cerevisiae-starter-cultures-with-increased-acetate-ester-production
#16
Esther Meersman, Jan Steensels, Nore Struyf, Tinneke Paulus, Veerle Saels, Melissa Mathawan, Leen Allegaert, Gino Vrancken, Kevin J Verstrepen
Microbial starter cultures have extensively been used to enhance the consistency and efficiency of industrial fermentations. Despite the advantages of such controlled fermentations, the fermentation involved in the production of chocolate is still a spontaneous process that relies on the natural microbiota at cocoa farms. However, recent studies indicate that certain thermotolerant Saccharomyces cerevisiae cultures can be used as starter cultures for cocoa pulp fermentation. In this study, we investigate the potential of specifically developed starter cultures to modulate chocolate aroma...
November 20, 2015: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/26537663/pseudofulvibacter-gastropodicola-sp-nov-isolated-from-a-marine-conch-and-emended-descriptions-of-the-genus-pseudofulvibacter-yoon-et-al-2013-and-pseudofulvibacter-geojedonensis
#17
Sung-Hyun Yang, Hyun-Seok Seo, Jung-Hyun Lee, Sang-Jin Kim, Kae Kyoung Kwon
A Gram-stain-negative, aerobic, rod-shaped and non-motile marine bacterium, designated MEBiC08749T, was isolated from a marine conch collected at Samcheok Port in the East Sea, Korea (also known as the Sea of Japan). 16S rRNA gene sequence analysis revealed that strain MEBiC08749T shared highest similarity with Pseudofulvibacter geojedonensis YCS-9T (94.9 %). Growth was observed at 5-31 °C (optimum, 25 °C), at pH 6.0-8.5 (optimum, pH 7.5) and with 0-6 % (w/v) NaCl (optimum, 2.5 %). The predominant cellular fatty acids were iso-C15 : 0, iso-C15 : 1 G, iso-C15 : 0 3-OH, iso-C17 : 0 3-OH, summed feature 3 (comprising C16 : 1ω6c and/or C16 : 1ω7c) and summed feature 9 (comprising 10-methyl C16 : 0 and/or iso-C17 : 1ω9c)...
January 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/26500816/intraspecific-variation-of-phragmocone-chamber-volumes-throughout-ontogeny-in-the-modern-nautilid-nautilus-and-the-jurassic-ammonite-normannites
#18
Amane Tajika, Naoki Morimoto, Ryoji Wani, Carole Naglik, Christian Klug
Nautilus remains of great interest to palaeontologists after a long history of actualistic comparisons and speculations on aspects of the palaeoecology of fossil cephalopods, which are otherwise impossible to assess. Although a large amount of work has been dedicated to Nautilus ecology, conch geometry and volumes of shell parts and chambers have been studied less frequently. In addition, although the focus on volumetric analyses for ammonites has been increasing recently with the development of computed tomographic technology, the intraspecific variation of volumetric parameters has never been examined...
2015: PeerJ
https://www.readbyqxmd.com/read/26447195/will-jumping-snails-prevail-influence-of-near-future-co%C3%A2-temperature-and-hypoxia-on-respiratory-performance-in-the-tropical-conch-gibberulus-gibberulus-gibbosus
#19
Sjannie Lefevre, Sue-Ann Watson, Philip L Munday, Göran E Nilsson
Tropical coral reef organisms are predicted to be especially sensitive to ocean warming because many already live close to their upper thermal limit, and the expected rise in ocean CO2 is proposed to further reduce thermal tolerance. Little, however, is known about the thermal sensitivity of a diverse and abundant group of reef animals, the gastropods. The humpbacked conch (Gibberulus gibberulus gibbosus), inhabiting subtidal zones of the Great Barrier Reef, was chosen as a model because vigorous jumping, causing increased oxygen uptake (ṀO2 ), can be induced by exposure to odour from a predatory cone snail (Conus marmoreus)...
October 2015: Journal of Experimental Biology
https://www.readbyqxmd.com/read/26395044/perturbation-of-the-microvascular-glycocalyx-and-perfusion-in-infants-after-cardiopulmonary-bypass
#20
Claudia Nussbaum, Amelie Haberer, Anna Tiefenthaller, Katarzyna Januszewska, Daniel Chappell, Florian Brettner, Peter Mayer, Robert Dalla Pozza, Orsolya Genzel-Boroviczény
OBJECTIVE: Perturbation of the endothelial glycocalyx is discussed in the pathogenesis of complications related to cardiopulmonary bypass. We evaluated the effects of cardiopulmonary bypass on the microcirculation and the microvascular endothelial glycocalyx of infants undergoing surgery for congenital cardiac defects. METHODS: The microcirculation was visualized at the ear conch using Sidestream dark field imaging before surgery (T0), after admission to the intensive care unit (T1), 24 hours postsurgery (T2), and 7 days postsurgery (T3)...
December 2015: Journal of Thoracic and Cardiovascular Surgery
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