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https://www.readbyqxmd.com/read/28239874/habitat-segregation-and-cryptic-adaptation-of-species-of-periophthalmus-gobioidei-gobiidae
#1
G Polgar, S Zaccara, M Babbucci, F Fonzi, C M Antognazza, N Ishak, Z Sulaiman, G Crosa
A study was conducted on the habitat distribution of four sympatric species of Periophthalmus (the silver-lined mudskipper Periophthalmus argentilineatus, the slender mudskipper Periophthalmus gracilis, the kalolo mudskipper Periophthalmus kalolo and the Malacca mudskipper Periophthalmus malaccensis) from northern Sulawesi. Molecular phylogenetic reconstructions based on one mtDNA marker (16S) were used to validate the morphological taxa, identifying five molecular clades. Periophthalmus argentilineatus includes two molecular species, which are named Periophthalmus argentilineatus clades F and K...
February 27, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28239753/six-minute-walk-test-in-evaluation-of-children-with-pulmonary-arterial-hypertension
#2
Malgorzata Zuk, Anna Migdal, Dorota Jagiellowicz-Kowalska, Katarzyna Mazurkiewicz, Anna Sadel-Wieczorek, Grazyna Brzezinska-Rajszys
Six-minute walk test (6MWT) is a submaximal exercise test applied for evaluation of adults with pulmonary arterial hypertension (PAH). It was widely used as an endpoint in the clinical trials. The aim of the study was to assess the usefulness of 6MWT in management of children with PAH and to establish correlations with other clinical features. 164 6MWT were performed in 15 children between 5 and 18 years with PAH confirmed by right heart catheterization (102 in patients with shunt, 62 without shunt). Distance in 6MWT (6MWD)-% of predicted for age and gender, desaturation at the maximum effort, peak heart rate (HR)-% of maximal HR, were compared to the level of NTproBNP, WHO-FC, echocardiography parameters, and events of PAH treatment intensification...
February 27, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28239554/the-development-and-characterization-of-a-novel-yet-simple-3d-printed-tool-to-facilitate-phantom-imaging-of-photoacoustic-contrast-agents
#3
Santiago J Arconada-Alvarez, Jeanne E Lemaster, Junxin Wang, Jesse V Jokerst
We report a new approach to preparing phantoms using 3D printing. This device supports plastic tubing containing the contrast agent and is immersed in a solution with absorption or scattering properties that mimic tissue. Up to 12 tubing samples could be placed in the device with sample-to-sample spacing as low as 0.3 mm and at a constant distance from the transducer (±0.16 mm), which is critical in validating photoacoustic contrast agents. We also studied different types of tubing and found that tubing with a larger outside diameter has more inherent signal...
March 2017: Photoacoustics
https://www.readbyqxmd.com/read/28239386/local-climate-heterogeneity-shapes-population-genetic-structure-of-two-undifferentiated-insular-scutellaria-species
#4
Huan-Yi Hsiung, Bing-Hong Huang, Jui-Tse Chang, Yao-Moan Huang, Chih-Wei Huang, Pei-Chun Liao
Spatial climate heterogeneity may not only affect adaptive gene frequencies but could also indirectly shape the genetic structure of neutral loci by impacting demographic dynamics. In this study, the effect of local climate on population genetic variation was tested in two phylogenetically close Scutellaria species in Taiwan. Scutellaria taipeiensis, which was originally assumed to be an endemic species of Taiwan Island, is shown to be part of the widespread species S. barbata based on the overlapping ranges of genetic variation and climatic niches as well as their morphological similarity...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28239355/modification-of-flight-and-locomotion-performances-respiratory-metabolism-and-transcriptome-expression-in-the-lady-beetle-harmonia-axyridis-through-sublethal-pesticide-exposure
#5
Da Xiao, Xiaoling Tan, Wenjuan Wang, Fan Zhang, Nicolas Desneux, Su Wang
Biological control is usually used in combination with chemical control for practical agricultural applications. Thus, the influence of insecticides on the natural predators used for biological control should be investigated for integrated pest management. The ladybird Harmonia axyridis is an effective predator on aphids and coccids. Beta-cypermethrin is a broad-spectrum insecticide used worldwide for controlling insect pests. H. axyridis is becoming increasingly threatened by this insecticide. Here, we investigated the effect of a sublethal dose of beta-cypermethrin on flight, locomotion, respiration, and detoxification system of H...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28239345/improvements-in-orientation-and-balancing-abilities-in-response-to-one-month-of-intensive-slackline-training-a-randomized-controlled-feasibility-study
#6
Milos Dordevic, Anita Hökelmann, Patrick Müller, Kathrin Rehfeld, Notger G Müller
Background: Slackline-training has been shown to improve mainly task-specific balancing skills. Non-task specific effects were assessed for tandem stance and preferred one-leg stance on stable and perturbed force platforms with open eyes. It is unclear whether transfer effects exist for other balancing conditions and which component of the balancing ability is affected. Also, it is not known whether slackline-training can improve non-visual-dependent spatial orientation abilities, a function mainly supported by the hippocampus...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28239339/microarray-and-qpcr-analyses-of-wallerian-degeneration-in-rat-sciatic-nerves
#7
Sheng Yi, Xin Tang, Jun Yu, Jie Liu, Fei Ding, Xiaosong Gu
Wallerian degeneration occurs immediately following injury to mammal peripheral nerves. To better understand the molecular events occurring during Wallerian degeneration, a rat model of sciatic nerve transection was used to assess differentially expressed genes at 0.5, 1, 6, 12, 24 h, 4 days, 1, 2, 3, and 4 weeks post nerve injury (PNI). Hierarchical clustering, Euclidean distance matrix, and principal component analysis (PCA) collectively suggested three distinct phases within the post-injury period of 4 weeks...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28239026/ectopic-expression-of-meiotic-cohesin-rad21l-promotes-adjacency-of-homologous-chromosomes-in-somatic-cells
#8
Mei Rong, Sachi Miyauchi, Jibak Lee
Pairing, synapsis, and crossover recombination of homologous chromosomes (homologs) are prerequisite for the proper segregation of homologs during meiosis I. The meiosis-specific cohesin subunit, RAD21L, is essential for such meiotic chromosomal events, but it is unknown to what extent RAD21L by itself contributes to the process since various meiotic genes are also involved. To reveal the exclusive contribution of RAD21L to the specific regulation of homologs, we examined the effects of ectopic RAD21L expression on chromosome dynamics in somatic cells...
February 26, 2017: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/28238962/a-new-aiming-guide-can-create-the-tibial-tunnel-at-favorable-position-in-transtibialpullout-repair-for-the-medial-meniscus-posterior-root-tear
#9
Takayuki Furumatsu, Yuya Kodama, Masataka Fujii, Takaaki Tanaka, Tomohito Hino, Yusuke Kamatsuki, Kazuki Yamada, Shinichi Miyazawa, Toshifumi Ozaki
INTRODUCTION: Injuries to the medial meniscus (MM) posterior root lead to accelerated cartilage degeneration of the knee. An anatomic placement of the MM posterior root attachment is considered to be critical in transtibial pullout repair of the medial meniscus posterior root tear (MMPRT). However, tibial tunnel creation at the anatomic attachment of the MM posterior root is technically difficult using a conventional aiming device. The aim of this study was to compare two aiming guides...
February 23, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28238459/linking-sources-to-early-effects-by-profiling-urine-metabolome-of-residents-living-near-oil-refineries-and-coal-fired-power-plants
#10
Chi-Hsin Sally Chen, Tzu-Hsuen Yuan, Ruei-Hao Shie, Kuen-Yuh Wu, Chang-Chuan Chan
BACKGROUND: This study aims at identifying metabolic changes linking external exposure to industrial air toxics with oxidative stress biomarkers. METHODS: We classified 252 study subjects as 111 high vs. 141 low exposure subjects by the distance from their homes to the two main emission sources, oil refineries and coal-fired power plants. We estimated individual's external exposure to heavy metals and polycyclic aromatic hydrocarbons (PAHs) by dispersion and kriging models, respectively...
February 23, 2017: Environment International
https://www.readbyqxmd.com/read/28238423/a-computational-algorithm-for-classifying-step-and-spin-turns-using-pelvic-center-of-mass-trajectory-and-foot-position
#11
Pawel R Golyski, Brad D Hendershot
Transient changes in direction during ambulation are typically performed using a step (outside) or spin (inside) turning strategy, often identified through subjective and time-consuming visual rating. Here, we present a computational, marker-based classification method utilizing pelvic center of mass (pCOM) trajectory and time-distance parameters to quantitatively identify turning strategy. Relative to visual evaluation by three independent raters, sensitivity, specificity, and overall accuracy of the pCOM-based classification method were evaluated for 90-degree turns performed by 3 separate populations (5 uninjured controls, 5 persons with transtibial amputation, and 5 persons with transfemoral amputation); each completed turns using two distinct cueing paradigms (i...
January 30, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28238379/anthropogenic-mercury-deposition-in-flin-flon-manitoba-and-the-experimental-lakes-area-ontario-canada-a-multi-lake-sediment-core-reconstruction
#12
Johan A Wiklund, Jane L Kirk, Derek C G Muir, Marlene Evans, Fan Yang, Jonathan Keating, Matthew T Parsons
High-resolution records of anthropogenic mercury (Hg) deposition were constructed from 9 lakes located 5-75km from the Flin Flon, Manitoba smelter (formerly one of North America's largest atmospheric Hg point sources) and 5 lakes in Experimental Lakes Area (ELA), Ontario; a region remote from major Hg point sources. Anthropogenic Hg deposition, as both a flux and inventory, was determined after accounting for lake-specific natural Hg background concentrations, changes in sedimentation and sediment focusing...
February 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28238366/modeling-potential-occupational-inhalation-exposures-and-associated-risks-of-toxic-organics-from-chemical-storage-tanks-used-in-hydraulic-fracturing-using-aermod
#13
Huan Chen, Kimberly E Carter
Various toxic chemicals used in hydraulic fracturing fluids may influence the inherent health risks associated with these operations. This study investigated the possible occupational inhalation exposures and potential risks related to the volatile organic compounds (VOCs) from chemical storage tanks and flowback pits used in hydraulic fracturing. Potential risks were evaluated based on radial distances between 5 m and 180 m from the wells for 23 contaminants with known inhalation reference concentration (RfC) or inhalation unit risks (IUR)...
February 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28238204/combining-hydrodynamic-modelling-with-genetics-can-passive-larval-drift-shape-the-genetic-structure-of-baltic-mytilus-populations
#14
Heiko Stuckas, Loreen Knöbel, Hanna Schade, Corinna Breusing, Hans-Harald Hinrichsen, Manuela Bartel, Klaudia Langguth, Frank Melzner
While secondary contact between Mytilus edulis and M. trossulus in North America results in mosaic hybrid zone formation, both species form a hybrid swarm in the Baltic. Despite pervasive gene flow, Baltic Mytilus species maintain substantial genetic and phenotypic differentiation. Exploring mechanisms underlying the contrasting genetic composition in Baltic Mytilus species will allow insights into processes such as speciation or adaptation to extremely low salinity. Previous studies in the Baltic indicated that only weak interspecific reproductive barriers exist and discussed the putative role of adaptation to environmental conditions...
February 26, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28238049/intraspecific-and-phylogenetic-density-dependent-seedling-recruitment-in-a-subtropical-evergreen-forest
#15
Yanjun Du, Simon A Queenborough, Lei Chen, Yunquan Wang, Xiangcheng Mi, Keping Ma, Liza S Comita
Recent evidence suggests that plant performance can be influenced by the phylogenetic diversity of neighboring plants. However, no study to date has examined the effect of such phylogenetic density dependence on the transition from seed to seedling. Using 6 years of data on seedling recruitment and seed rain of 13 species from 130 stations (one 0.5 m(2) seed trap and three adjacent 1 m(2) seedling plots) in a subtropical evergreen forest, we asked: (1) Does negative density dependence act across seed to seedling stages? (2) Is there evidence for phylogenetic density dependence during the seed to seedling transition? (3) Does the strength of density dependence vary among years? Generalized linear mixed-effects models were used to model seed to seedling transition as a function of conspecific seed and seedling densities, heterospecific seed and seedling densities, and mean phylogenetic distance of heterospecific seeds and seedling...
February 25, 2017: Oecologia
https://www.readbyqxmd.com/read/28237940/an-adaptive-semisupervised-feature-analysis-for-video-semantic-recognition
#16
Minnan Luo, Xiaojun Chang, Liqiang Nie, Yi Yang, Alexander G Hauptmann, Qinghua Zheng
Video semantic recognition usually suffers from the curse of dimensionality and the absence of enough high-quality labeled instances, thus semisupervised feature selection gains increasing attentions for its efficiency and comprehensibility. Most of the previous methods assume that videos with close distance (neighbors) have similar labels and characterize the intrinsic local structure through a predetermined graph of both labeled and unlabeled data. However, besides the parameter tuning problem underlying the construction of the graph, the affinity measurement in the original feature space usually suffers from the curse of dimensionality...
February 20, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28237845/fuzzy-logic-applied-to-prospecting-for-areas-for-installation-of-wood-panel-industries
#17
Alexandre Rosa Dos Santos, Ewerthon Mattos Paterlini, Nilton Cesar Fiedler, Carlos Antonio Alvares Soares Ribeiro, Alexandre Simões Lorenzon, Getulio Fonseca Domingues, Gustavo Eduardo Marcatti, Nero Lemos Martins de Castro, Thaisa Ribeiro Teixeira, Gleissy Mary Amaral Dino Alves Dos Santos, Ronie Silva Juvanhol, Elvis Ricardo Figueira Branco, Pedro Henrique Santos Mota, Lilianne Gomes da Silva, Daiani Bernardo Pirovani, Waldir Cintra de Jesus, Ana Carolina de Albuquerque Santos, Helio Garcia Leite, Setsuo Iwakiri
Prospecting for suitable areas for forestry operations, where the objective is a reduction in production and transportation costs, as well as the maximization of profits and available resources, constitutes an optimization problem. However, fuzzy logic is an alternative method for solving this problem. In the context of prospecting for suitable areas for the installation of wood panel industries, we propose applying fuzzy logic analysis for simulating the planting of different species and eucalyptus hybrids in Espírito Santo State, Brazil...
February 23, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28237698/relationship-between-masticatory-performance-using-a-gummy-jelly-and-masticatory-movement
#18
Hanako Uesugi, Hiroshi Shiga
PURPOSE: The purpose of this study was to clarify the relationship between masticatory performance using a gummy jelly and masticatory movement. METHODS: Thirty healthy males were asked to chew a gummy jelly on their habitual chewing side for 20s, and the parameters of masticatory performance and masticatory movement were calculated as follows. For evaluating the masticatory performance, the amount of glucose extraction during chewing of a gummy jelly was measured...
February 22, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28237642/oncologic-relevance-of-magnetic-resonance-imaging-detected-threatened-mesorectal-fascia-for-patients-with-mid-or-low-rectal-cancer-a-longitudinal-analysis-before-and-after-long-course-concurrent-chemoradiotherapy
#19
Il Tae Son, Young Hoon Kim, Kyoung Ho Lee, Sung Il Kang, Duck-Woo Kim, Eun Shin, Keun-Wook Lee, Soyeon Ahn, Jae-Sung Kim, Sung-Bum Kang
BACKGROUND: The oncologic importance of threatened mesorectal fascia detected with magnetic resonance imaging is obscured by the heterogeneity of preoperative treatments. We evaluated the oncologic relevance of threatened mesorectal fascia detected with consecutive magnetic resonance imaging performed before and after long-course, concurrent chemoradiotherapy (LCRT) for mid or low rectal cancer. METHODS: We evaluated 196 patients who underwent total mesorectal excision with LCRT...
February 22, 2017: Surgery
https://www.readbyqxmd.com/read/28237580/effect-of-larval-growth-conditions-on-adult-body-mass-and-long-distance-flight-endurance-in-a-wood-boring-beetle-do-smaller-beetles-fly-better
#20
Stav Brown, Victoria Soroker, Gal Ribak
The tropical fig borer, Batocera rufomaculata De Geer, is a large beetle that is a pest on a number of fruit trees, including fig and mango. Adults feed on the leaves and twigs and females lay their eggs under the bark of the tree. The larvae bore into the tree trunk, causing substantial damage that may lead to the collapse and death of the host tree. We studied how larval development under inferior feeding conditions (experienced during development in dying trees) affects flight endurance in the adult insect...
February 22, 2017: Journal of Insect Physiology
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