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https://www.readbyqxmd.com/read/28219451/quantitative-morphological-analysis-of-2d-images-of-complex-shaped-branching-biological-growth-forms-the-example-of-branching-thalli-of-liverworts
#1
Pirom Konglerd, Catherine Reeb, Fredrik Jansson, Jaap A Kaandorp
BACKGROUND: Many organisms such as plants can be characterized as complex-shaped branching forms. The morphological quantification of the forms is a support for a number of areas such as the effects of environmental factors and species discrimination. To date, there is no software package suitable for our dataset representing the forms. We therefore formulate methods for extracting morphological measurements from images of the forms. RESULTS: As a case study we analyze two-dimensional images of samples from four groups belonging to three species of thalloid liverworts, genus Riccardia...
February 20, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28216669/role-of-relativity-in-high-pressure-phase-transitions-of-thallium
#2
Komsilp Kotmool, Sudip Chakraborty, Thiti Bovornratanaraks, Rajeev Ahuja
We demonstrate the relativistic effects in high-pressure phase transitions of heavy element thallium. The known first phase transition from h.c.p. to f.c.c. is initially investigated by various relativistic levels and exchange-correlation functionals as implemented in FPLO method, as well as scalar relativistic scheme within PAW formalism. The electronic structure calculations are interpreted from the perspective of energetic stability and electronic density of states. The full relativistic scheme (FR) within L(S)DA performs to be the scheme that resembles mostly with experimental results with a transition pressure of 3 GPa...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28206821/simulated-space-radiation-impact-of-four-different-types-of-high-dose-ionizing-radiation-on-the-lichen-xanthoria-elegans
#3
Annette Brandt, Joachim Meeßen, Reiner U Jänicke, Marina Raguse, Sieglinde Ott
This study addresses the viability of the lichen Xanthoria elegans after high-dose ionizing irradiation in the frame of the STARLIFE campaign. The first set of experiments was intended to resemble several types of galactic cosmic radiation (GCR) as present beyond the magnetic shield of Earth. In the second set of experiments, γ radiation up to 113 kGy was applied to test the limit of lichen resistance to ionizing radiation. Entire thalli of Xanthoria elegans were irradiated in the anhydrobiotic state. After STARLIFE 1, the metabolic activity of both symbionts was quantified by live/dead staining with confocal laser scanning microscopy...
February 2017: Astrobiology
https://www.readbyqxmd.com/read/28205244/spatial-organization-of-the-three-component-lichen-peltigera-aphthosa-in-functional-terms
#4
Konstantin Chekanov, Alexandr Feoktistov, Elena Lobakova
The cephalolichen Peltigera aphthosa (L.) Willd. is characterized by lateral heterogeneity, which manifests itself in the presence of three thallus zones, referred to as the apical, basal and medial zone. These zones differ in terms of interaction between lichen bionts and their physiological activity. The apical thallus zone is more efficient in establishing a contact with cyanobacteria, due to a higher lectin content and a larger overall thallus surface area due to the presence of numerous mycobiont hyphae...
February 16, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28203686/ocular-involvement-of-multicentric-malignant-b-cell-lymphoma-in-a-ewe-a-case-report
#5
James O Rushton, Denise Thaller, Reinhild Krametter-Froetscher
An 8.5-year-old, 98 kg female mountain sheep presented with bilateral exophthalmos with reduced retropulsion of the globes, impairing physiologic eyelid closure, sanguineous ocular discharge, as well as swelling of the eyelids and periocular skin. Bilateral vitreal hemorrhage hindering examination of the fundus was further noticed. Systemic signs included reduced general demeanour, presence of a firm mass in the left half of the mammary gland, multiple masses in the area of the vulva and a mass between the shoulder blades...
February 16, 2017: Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere
https://www.readbyqxmd.com/read/28198517/a-monte-carlo-study-for-optimizing-the-detector-of-spect-imaging-using-a-xcat-human-phantom
#6
Mohammad Khoshakhlagh, Jalil Pirayesh Islamian, Seyyed Mohammad Abedi, Babak Mahmoudian, Masoud Shayesteh Azar
BACKGROUND: Acquiring a high quality image has assigned an important concern for obtaining accurate diagnosis in nuclear medicine. Detector is a critical component of Single Photon Emission Computed Tomography (SPECT) imaging system for giving accurate information from exact pattern of radionuclide distribution in the target organ. The images are strongly affected by the attenuation, scattering, and response of the detector. The conventional detector is mainly made from sodium iodide activated by thallium [NaI(Tl)] in nuclear medicine imaging...
2017: Nuclear Medicine Review. Central & Eastern Europe
https://www.readbyqxmd.com/read/28187967/an-investigation-of-the-space-distribution-of-ulva-microscopic-propagules-and-ship-based-experiment-of-mitigation-using-modified-clay
#7
Jing Li, Xiuxian Song, Yue Zhang, Jun Pan, Zhiming Yu
Previous studies suggested that the removal of Ulva microscopic propagules (UMP) from cradle water might restrict the formation and expansion of green tides in the Yellow Sea, China. In this study, the distribution characteristics of UMP in the southern Yellow Sea was investigated, and then a flocculation experiment of UMP using modified clay (MC) was conducted at a selected station of the research cruise. The results indicated that the distribution of green algae thalli is one of the main factors that directly influence UMP distribution...
February 7, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28187684/controlling-photorelaxation-in-uracil-with-shaped-laser-pulses-a-theoretical-assessment
#8
Daniel Keefer, Sebastian Thallmair, Spiridoula Matsika, Regina de Vivie-Riedle
The RNA nucleobase uracil can suffer from photodamage when being exposed to UV light, which may lead to severe biological defects. To prevent this from happening in most cases, uracil exhibits an ultrafast relaxation mechanism from the electronically excited state back to the ground state. In our theoretical work, we demonstrate how this process can be significantly influenced using shaped laser pulses. This not only sheds new light into how efficient nature is in preventing biologically momentous photodamage...
February 10, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28179594/nuclear-cardiology-practice-in-asia-analysis-of-radiation-exposure-and-best-practice-for-myocardial-perfusion-imaging%C3%A3-results-from-the-iaea-nuclear-cardiology-protocols-cross-sectional-study-incaps
#9
Thomas N B Pascual, Mathew Mercuri, Noura El-Haj, Henry Hee-Sung Bom, Vikram Lele, Mouaz H Al-Mallah, Osnat Luxenburg, Ganesan Karthikeyan, Joao Vitola, John J Mahmarian, Nathan Better, Leslee J Shaw, Madan M Rehani, Ravi Kashyap, Diana Paez, Maurizio Dondi, Andrew J Einstein
BACKGROUND: This paper examines the current status of radiation exposure to patients in myocardial perfusion imaging (MPI) in Asia.Methods and Results:Laboratories voluntarily provided information on MPI performed over a 1-week period. Eight best practice criteria regarding MPI were predefined by an expert panel. Implementation of ≥6 best practices (quality index [QI] ≥6) was pre-specified as a desirable goal for keeping radiation exposure at a low level. Radiation effective dose (ED) in 1,469 patients and QI of 69 laboratories in Asia were compared against data from 239 laboratories in the rest of the world (RoW)...
February 8, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28161235/practical-use-of-imaging-technique-for-management-of-bone-and-soft-tissue-tumors
#10
Shinji Miwa, Takanobu Otsuka
Imaging modalities including radiography, computed tomography (CT), and magnetic resonance imaging (MRI) are necessary for the diagnosis of bone and soft tissue tumors. The history of imaging began with the discovery of X-rays in the 19th century. The development of CT, MRI, ultrasonography, and positron emission tomography (PET) have improved the management of bone and soft tissue tumors. X-ray imaging and CT scans enable the evaluation of bone destruction, periosteal reaction, sclerotic changes in lesions, condition of cortical bone, and ossification...
February 1, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28160993/three-cycles-of-human-biomonitoring-in-flanders-time-trends-observed-in-the-flemish-environment-and-health-study
#11
Greet Schoeters, Eva Govarts, Liesbeth Bruckers, Elly Den Hond, Vera Nelen, Stefaan De Henauw, Isabelle Sioen, Tim S Nawrot, Michelle Plusquin, Annette Vriens, Adrian Covaci, Ilse Loots, Bert Morrens, Dries Coertjens, Nicolas Van Larebeke, Sam De Craemer, Kim Croes, Nathalie Lambrechts, Ann Colles, Willy Baeyens
To follow time trends in exposure to environmental chemicals, three successive campaigns of the Flemish Environment and Health Study (FLEHS) have recruited and sampled in total 5825 participants between 2002 and 2014. Cord samples from newborns, urine and blood samples from 14 to 15 years old adolescents and from adults between 50 and 65 years old were analysed in geographical representative samples of the Flemish population. The data of the different campaigns were considered per age group and per biomarker after adjustment for predefined covariates to take into account differences in characteristics of the study populations over time...
November 18, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28159221/trace-elements-in-early-phase-type-2-diabetes-mellitus-a-population-based-study-the-hunt-study-in-norway
#12
Ailin Falkmo Hansen, Anica Simić, Bjørn Olav Åsvold, Pål Richard Romundstad, Kristian Midthjell, Tore Syversen, Trond Peder Flaten
Differences in trace elements levels between individuals with type 2 diabetes and controls have been reported in several studies in various body fluids and tissues, but results have been inconsistent. In order to examine trace element levels in the early phase of type 2 diabetes, we investigated the association between whole blood levels of 26 trace elements and the prevalence of previously undiagnosed, screening-detected type 2 diabetes. The study was conducted as a case-control study nested within the third survey of the population-based Nord-Trøndelag Health Study (HUNT3 Survey)...
March 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28157282/chalcogenide-aerogels-as-sorbents-for-noble-gases-xe-kr
#13
Kota S Subrahmanyam, Ioannis Spanopoulos, Jaehun Chun, Brian J Riley, Praveen K Thallapally, Pantelis N Trikalitis, Mercouri G Kanatzidis
High-surface-area molybdenum sulfide (MoSx) and antimony sulfide (SbSx) chalcogels were studied for Xe/Kr gas separation. The intrinsic soft Lewis basic character of the chalcogel framework is a unique property among the large family of porous materials and lends itself to a potential new approach toward the selective separation of Xe over Kr. Among these chalcogels, MoSx shows the highest Xe and Kr uptake, reaching 0.69 mmol g(-1) (1.05 mmol cm(-3)) and 0.28 mmol g(-1) (0.42 mmol cm(-3)) respectively, at 273 K and 1 bar...
February 3, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28154479/three-new-species-and-nine-new-records-in-the-genus-arthonia-from-south-korea
#14
Beeyoung Gun Lee, Jae-Seoun Hur
Arthonia coreana, Arthonia superpallens, and Arthonia zelkovae are new species from South Korea. All new species are in the Euarthonia tribe, based on the key characteristics of colorless hypothecium and multi-cellular spores. A. coreana has a dull brownish hypophloedal thallus without bleaching and rounded or curved big apothecia in comparison with those of Arthonia punctiformis. A. coreana consistently exhibits 4-septate ascospores, which is a distinctive characteristic that distinguishes it from other Arthonia species...
December 2016: Mycobiology
https://www.readbyqxmd.com/read/28153920/the-liverwort-marchantia-drives-alternative-electron-flow-using-a-flavodiiron-protein-to-protect-psi
#15
Ginga Shimakawa, Kimitsune Ishizaki, Shigeyuki Tsukamoto, Moeko Tanaka, Takehiro Sejima, Chikahiro Miyake
The diffusion efficiency of O2 in atmosphere, like that of CO2, is approximately 10(4) times greater than that in aqueous environments. Consequently, terrestrial photosynthetic organisms need mechanisms to protect against potential oxidative damage. The liverwort Marchantia polymorpha, a basal land plant, has habitats where it is exposed to both water and the atmosphere. Furthermore, like cyanobacteria, M. polymorpha has genes encoding flavodiiron proteins (FLV). In cyanobacteria, FLVs mediate O2-dependent alternative electron flow (AEF) to suppress production of reactive oxygen species...
February 2, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28153694/production-in-pichia-pastoris-antifungal-activity-and-crystal-structure-of-a-class-i-chitinase-from-cowpea-vigna-unguiculata-insights-into-sugar-binding-mode-and-hydrolytic-action
#16
Patrícia G Castro Landim, Tuana O Correia, Fredy D A Silva, Denise R Nepomuceno, Helen P S Costa, Humberto M Pereira, Marina D P Lobo, Frederico B M B Moreno, José Brandão-Neto, Suelen C Medeiros, Ilka M Vasconcelos, José T A Oliveira, Bruno L Sousa, Ito L Barroso-Neto, Valder N Freire, Cristina P S Carvalho, Ana C O Monteiro-Moreira, Thalles B Grangeiro
A cowpea class I chitinase (VuChiI) was expressed in the methylotrophic yeast P. pastoris. The recombinant protein was secreted into the culture medium and purified by affinity chromatography on a chitin matrix. The purified chitinase migrated on SDS-polyacrylamide gel electrophoresis as two closely-related bands with apparent molecular masses of 34 and 37 kDa. The identity of these bands as VuChiI was demonstrated by mass spectrometry analysis of tryptic peptides and N-terminal amino acid sequencing. The recombinant chitinase was able to hydrolyze colloidal chitin but did not exhibit enzymatic activity toward synthetic substrates...
January 30, 2017: Biochimie
https://www.readbyqxmd.com/read/28150111/spect-and-pet-in-ischemic-heart-failure
#17
George Angelidis, Gregory Giamouzis, Georgios Karagiannis, Javed Butler, Ioannis Tsougos, Varvara Valotassiou, George Giannakoulas, Nikolaos Dimakopoulos, Andrew Xanthopoulos, John Skoularigis, Filippos Triposkiadis, Panagiotis Georgoulias
Heart failure is a common clinical syndrome associated with significant morbidity and mortality worldwide. Ischemic heart disease is the leading cause of heart failure, at least in the industrialized countries. Proper diagnosis of the syndrome and management of patients with heart failure require anatomical and functional information obtained through various imaging modalities. Nuclear cardiology techniques play a main role in the evaluation of heart failure. Myocardial single photon emission computed tomography (SPECT) with thallium-201 or technetium-99 m labelled tracers offer valuable data regarding ventricular function, myocardial perfusion, viability, and intraventricular synchronism...
February 2, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28145458/effects-of-ocean-acidification-on-the-potency-of-macroalgal-allelopathy-to-a-common-coral
#18
Carlos Del Monaco, Mark E Hay, Patrick Gartrell, Peter J Mumby, Guillermo Diaz-Pulido
Many coral reefs have phase shifted from coral to macroalgal dominance. Ocean acidification (OA) due to elevated CO2 is hypothesised to advantage macroalgae over corals, contributing to these shifts, but the mechanisms affecting coral-macroalgal interactions under OA are unknown. Here, we show that (i) three common macroalgae are more damaging to a common coral when they compete under CO2 concentrations predicted to occur in 2050 and 2100 than under present-day conditions, (ii) that two macroalgae damage corals via allelopathy, and (iii) that one macroalga is allelopathic under conditions of elevated CO2, but not at ambient levels...
February 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28144765/control-of-haemonchus-contortus-in-sheep-using-basidiocarps-of-agaricus-blazei-murril
#19
Thallyta Maria Vieira, Leydiana Duarte Fonseca, Gabriela Almeida Bastos, Viviane de Oliveira Vasconcelos, Maria Luíza França Silva, Franciellen Morais-Costa, Adriano Vinícius de Paiva Ferreira, Neide Judith Faria de Oliveira, Eduardo Robson Duarte
OBJECTIVE: This study evaluated the effects in vitro and in vivo of Agaricus blazei against Haemonchus contortus in sheep. METHODS: The in vitro efficacy of aqueous extract on egg hatching inhibition (EHI) was investigated and after 72 h incubation with varying concentrations the effects on, blastomeres, embryonated eggs, and first stage larvae (L1) were evaluated. Larval development inhibition (LDI) for dry powder and the aqueous extract were evaluated in fecal cultures of sheep infected with H...
January 31, 2017: Veterinary Research Communications
https://www.readbyqxmd.com/read/28134632/posterior-medial-canthal-thermoplasty
#20
Kaveh Vahdani, Vladimir Theodor Thaller
PURPOSE: To describe a new, simple, quick, and minimally invasive surgical technique for managing medial canthal tendon laxity. METHODS: The technique works by creating a directed posterior lamellar scar. Sutures are preplaced in firm medial canthal tissue, and a triangular diathermy burn is made between this fixation point and the medial tarsal plate (sparing the canaliculus). This area is then plicated horizontally by bringing the preplaced sutures through the medial tarsal plate...
January 25, 2017: Ophthalmic Plastic and Reconstructive Surgery
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