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https://www.readbyqxmd.com/read/28732404/influence-of-the-stabilizers-on-the-toxicity-of-metallic-nanomaterials-in-aquatic-organisms-and-human-cell-lines
#1
Tatiana Andreani, Verónica Nogueira, Vera V Pinto, Maria José Ferreira, Maria Graça Rasteiro, Amélia M Silva, Ruth Pereira, Carlos M Pereira
In this study, following a systematic approach, we used aquatic species (bacteria Vibrio fischeri and microalgae Raphidocelis subcapitata) and different human cell lines (Caco-2, HepG2, SV-80 and HaCaT) representing different tissues and exposure pathways, to investigate how two organic stabilizers (PVA and DMSO) used for NMs dispersion influence their physicochemical properties, the persistence of metals in suspension and the toxicity/ecotoxicity of two metallic NMs (nano-Ag and nano-Cu). Although the stabilizers are expected to contribute to improve the dispersion and stability of NMs, the results obtained clearly showed that no similar changes in toxicity and morphological properties of the nano-Ag can be expected after its stabilization with PVA...
July 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28731569/diversity-in-thermal-affinity-among-key-piscivores-buffers-impacts-of-ocean-warming-on-predator-prey-interactions
#2
Rebecca L Selden, Ryan D Batt, Vincent S Saba, Malin L Pinsky
Asymmetries in responses to climate change have the potential to alter important predator-prey interactions, in part by altering the location and size of spatial refugia for prey. We evaluated the effect of ocean warming on interactions between four important piscivores and four of their prey in the U.S. Northeast Shelf by examining species overlap under historical conditions (1968-2014) and with a doubling in CO2 . Because both predator and prey shift their distributions in response to changing ocean conditions, the net impact of warming or cooling on predator-prey interactions was not determined a priori from the range extent of either predator or prey alone...
July 21, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28731545/genome-scale-data-reveals-that-endemic-poecilia-populations-from-small-sulfidic-springs-display-no-evidence-of-inbreeding
#3
Anthony P Brown, Ryan Greenway, Samuel Morgan, Corey R Quackenbush, Luca Giordani, Lenin Arias-Rodriguez, Michael Tobler, Joanna L Kelley
Populations with limited ranges can be highly vulnerable to changes in their environment and are, thus, of high conservation concern. Populations that experience human-induced range reductions are often highly inbred and lack genetic diversity, but it is unknown whether this is also the case for populations with naturally small ranges. The fishes Poecilia sulphuraria (listed as critically endangered) and Poecilia thermalis, which are endemic to small hydrogen sulfide rich springs in southern Mexico, are examples of such populations with inherently small habitats...
July 21, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28731169/in%C3%A2-vivo-and-in%C3%A2-vitro-inhibition-of-human-gastric-cancer-progress-by-upregulating-kank1-gene
#4
Tao Chen, Kun Wang, Xianzhou Tong
Recent research has found that Kank1 gene, as one of the important members of the Kank gene family, plays an important role in the occurrence and development of malignant tumors. As a brand new cancer suppressor gene, its expression is significantly downregulated or missing in various kinds of malignant tumors. However, no report on the specific role of Kank1 in the genesis and development of gastric cancer is available yet. In the present study, we found significantly lower expression of Kank1 gene in human gastric cancer cells...
July 17, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28731017/methotrexate-iontophoresis-versus-coal-tar-ointment-in-palmoplantar-psoriasis-a-pilot-study
#5
K Haseena, Sandhya George, Najeeba Riyaz, Sarita Sasidharanpillai, Paul V Puthussery
BACKGROUND: Palmoplantar psoriasis is often disabling and refractory to conventional therapy. Systemic drugs are indicated in its severe form, but side effects are a concern with their use. Methotrexate is one such systemic drug which is effective and cheap. To reduce systemic toxicity, methotrexate has been tried topically but results have been inconsistent due to poor drug penetration into the skin by passive diffusion. Iontophoresis may enhance its absorption and efficacy. AIM: To evaluate the efficacy and safety of topical methotrexate iontophoresis in comparison with coal tar ointment in the treatment of palmoplantar psoriasis...
July 20, 2017: Indian Journal of Dermatology, Venereology and Leprology
https://www.readbyqxmd.com/read/28730873/physiological-traits-determining-yield-tolerance-of-wheat-to-foliar-diseases
#6
Femke van den Berg, Neil Paveley, I J Bingham, Frank van den Bosch
Tolerance is defined as the ability of one cultivar to yield more than another cultivar, under similar disease severity. If both cultivars suffer an equal loss in healthy (green) leaf area duration (HAD) over the grain filling period due to disease presence, then the yield loss per unit HAD loss is smaller for a more tolerant cultivar. Little is understood of what physiological and developmental traits of cultivars determine disease tolerance. In this study we use a mathematical model of wheat to investigate the effect of a wide range of wheat phenotypes on tolerance...
July 21, 2017: Phytopathology
https://www.readbyqxmd.com/read/28730713/investigation-of-genetic-diversity-and-inbreeding-in-a-japanese-native-horse-breed-for-suggestions-on-its-conservation
#7
Akio Onogi, Kouichi Shirai, Tomoko Amano
Because native breeds can serve as genetic resources for adapting to environment changes, their conservation is important for future agroecosystems. Using pedigree analysis, we investigated genetic diversity and inbreeding in Japanese Hokkaido native horses, which have adapted to a cold climate and roughage diet. Genetic diversity was measured as the number of founders and the effective number of founders, ancestors and genomes. All metrics imply a decrease in genetic diversity. A comparison of these metrics suggested that pedigree bottlenecks contributed more than did random gene losses to the reduction of genetic diversity...
July 21, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28730209/geometric-and-electronic-properties-of-si-atom-doped-al-clusters-robustness-of-binary-superatoms-against-charging
#8
Minoru Akutsu, Kiichirou Koyasu, Junko Atobe, Ken Miyajima, Masaaki Mitsui, Hironori Tsunoyama, Atsushi Nakajima
The geometric and electronic properties of silicon-atom-doped aluminum clusters, AlnSim (n = 7-30, m = 0-2), were investigated experimentally. The size dependences of the ionization energy and electron affinity of AlnSim show that the stability of AlnSim is governed by the total number of valence electrons in the clusters, where Al and Si atoms behave as trivalent and tetravalent atoms, respectively. Together with theoretical calculations, it has been revealed that neutral Al10Si and Al12Si have a cage-like geometry with central Si atom encapsulation and closed electronic structures of superatomic orbitals (SAOs), and also that they both exhibit geometric robustness against reductive and oxidative changes as cage-like binary superatoms of Si@Al10 and Si@Al12...
July 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28729417/mathematical-modeling-of-tumor-tumor-distant-interactions%C3%A2-supports-a-systemic-control-of-tumor-growth
#9
Sebastien Benzekry, Clare Lamont, Dominique Barbolosi, Lynn Hlatky, Philip Hahnfeldt
Interactions between different tumors within the same organism have major clinical implications, especially in the context of surgery and metastatic disease. Three main explanatory theories (competition, angiogenesis inhibition and proliferation inhibition) have been proposed but precise determinants of the phenomenon remain poorly understood. Here we formalized these theories into mathematical models and performed biological experiments to test them with empirical data. In syngeneic mice bearing two simultaneously implanted tumors, growth of only one of the tumors was significantly suppressed (61% size reduction at day 15, p<0...
July 20, 2017: Cancer Research
https://www.readbyqxmd.com/read/28729304/effectiveness-of-the-management-of-major-depressive-episodes-disorder-in-adults-with-comorbid-chronic-physical-diseases-a-protocol-for-a-systematic-review-and-meta-analysis
#10
Pablo Martínez, Ariel Castro, Diego Alonso, Paul A Vöhringer, Graciela Rojas
INTRODUCTION: Depression is a global-scale public health problem, and a significant association has been established between depression and chronic physical diseases. This growing comorbidity poses a challenge to healthcare systems. We aim to assess the effectiveness of the management of major depressive episodes/disorder in adults with comorbid chronic physical diseases. METHODS AND ANALYSIS: We will conduct a systematic review and meta-analysis of randomised clinical trials...
July 20, 2017: BMJ Open
https://www.readbyqxmd.com/read/28729077/white-matter-microstructure-degenerates-in-patients-with-postherpetic-neuralgia
#11
Fuxiang Chen, Fuyong Chen, Zhanfang Shang, Yuan Shui, Guorong Wu, Chen Liu, Zhangya Lin, Yuanxiang Lin, Lianghong Yu, Dezhi Kang, Wei Tao, Yongjie Li
OBJECTIVE: The central mechanisms underlying postherpetic neuralgia (PHN) pain remain unknown. The primary purpose of this study was to identify microstructural white matter changes closely related to the PHN pain by means of diffusion tensor imaging (DTI) and tract-based spatial statistics (TBSS) analysis. METHODS: DTI data of the brains were obtained from 8 PHN patients and 8 healthy controls (HC) that were matched in age, gender, and educational level. DTI metrics, including fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD), were separately compared between the two groups using TBSS analysis to detect subtle microstructural changes...
July 17, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28728873/inactivation-of-alicyclobacillus-acidoterrestris-atcc-49025-spores-in-apple-juice-by-pulsed-light-influence-of-initial-contamination-and-required-reduction-levels
#12
Mariana I Ferrario, Sandra N Guerrero
The purpose of this study was to analyze the response of different initial contamination levels of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice as affected by pulsed light treatment (PL, batch mode, xenon lamp, 3pulses/s, 0-71.6J/cm(2)). Biphasic and Weibull frequency distribution models were used to characterize the relationship between inoculum size and treatment time with the reductions achieved after PL exposure. Additionally, a second order polynomial model was computed to relate required PL processing time to inoculum size and requested log reductions...
July 17, 2017: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/28728784/mitral-annuloplasty-ring-suture-forces-impact-of-surgeon-ring-and-use-conditions
#13
Eric L Pierce, Charles H Bloodworth, Andrew W Siefert, Thomas F Easley, Tetsushi Takayama, Tomonori Kawamura, Robert C Gorman, Joseph H Gorman, Ajit P Yoganathan
OBJECTIVE: The study objective was to quantify the effect of ring type, ring-annulus sizing, suture position, and surgeon on the forces required to tie down and constrain a mitral annuloplasty ring to a beating heart. METHODS: Physio (Edwards Lifesciences, Irvine, Calif) or Profile 3D (Medtronic, Dublin, Ireland) annuloplasty rings were instrumented with suture force transducers and implanted in ovine subjects (N = 23). Tie-down forces and cyclic contractile forces were recorded and analyzed at 10 suture positions and at 3 levels of increasing peak left ventricular pressure...
June 21, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28727823/structural-instability-of-large-scale-functional-networks
#14
Shogo Mizutaka, Kousuke Yakubo
We study how large functional networks can grow stably under possible cascading overload failures and evaluated the maximum stable network size above which even a small-scale failure would cause a fatal breakdown of the network. Employing a model of cascading failures induced by temporally fluctuating loads, the maximum stable size nmax has been calculated as a function of the load reduction parameter r that characterizes how quickly the total load is reduced during the cascade. If we reduce the total load sufficiently fast (r ≥ rc), the network can grow infinitely...
2017: PloS One
https://www.readbyqxmd.com/read/28727548/mr-ntd-manifold-regularization-nonnegative-tucker-decomposition-for-tensor-data-dimension-reduction-and-representation
#15
Xutao Li, Michael K Ng, Gao Cong, Yunming Ye, Qingyao Wu
With the advancement of data acquisition techniques, tensor (multidimensional data) objects are increasingly accumulated and generated, for example, multichannel electroencephalographies, multiview images, and videos. In these applications, the tensor objects are usually nonnegative, since the physical signals are recorded. As the dimensionality of tensor objects is often very high, a dimension reduction technique becomes an important research topic of tensor data. From the perspective of geometry, high-dimensional objects often reside in a low-dimensional submanifold of the ambient space...
August 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28727370/serum-tissue-factor-as-a-biomarker-for-renal-clear-cell-carcinoma
#16
Daniel D'Oliveira Silva, Jorge A P Noronha, Bartira E Pinheiro da Costa, Pedro Caetano Edler Zandona, Gustavo F Carvalhal
PURPOSE: to determine the usefulness of serum TF as a potential marker for patients with clear cell RCC. MATERIALS AND METHODS: prospective study of 30 patients with clear cell RCC submitted to nephrectomy and 16 controls without clear cell RCC treated surgically for other conditions. TF is a endothelium marker that was correlated with worse prognosis in a variety of solid tumors including RCC. Serum TF was collected before surgery at the operating room and in the postoperative setting after at least four weeks...
June 14, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/28727317/laparoscopic-transabdominal-preperitoneal-approach-for-umbilical-hernia-with-rectus-diastasis
#17
Sante Capitano
INTRODUCTION: Rectus diastasis, when coexistent with umbilical hernia, can benefit from mesh-based repair of the midline. Laparoscopic correction of an umbilical hernia involves the placement of a mesh in the peritoneal cavity, but this comes with the risk of bowel complications. However, newly developed dual-sided composite meshes have helped to reduce this risk. MATERIALS AND SURGICAL TECHNIQUE: Four men and three women with umbilical hernia and rectus diastasis were treated with laparoscopic transabdominal preperitoneal repair...
August 2017: Asian Journal of Endoscopic Surgery
https://www.readbyqxmd.com/read/28727179/overexpression-of-g%C3%AE-s-in-murine-osteoblasts-in-vivo-leads-to-increased-bone-mass-and-decreased-bone-quality
#18
Lucia Zhang, Kim S Sugamori, Colin Claridge, Ariana Dela Cruz, Marc D Grynpas, Jane Mitchell
GαS is a heterotrimeric G protein that transduces signals from activated G protein-coupled receptors on the cell surface to stimulate adenylyl cyclase/cyclic AMP signaling. GαS plays a central role in mediating numerous growth and maintenance processes including osteogenesis and bone turnover. Decreased GαS expression or activating mutations in GαS both affect bone suggesting that modulating GαS protein levels may be important for bone health and development. To examine the effects of increased osteoblastic GαS expression on bone development in vivo, we generated transgenic mice with GαS over-expression in osteoblasts (HOM-Gs mice) driven by the 3...
July 20, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28727063/effect-of-dietary-fiber-and-diet-particle-size-on-nutrient-digestibility-and-gastrointestinal-secretory-function-in-growing-pigs
#19
M Saqui-Salces, Z Luo, P E Urriola, B J Kerr, G C Shurson
Reduction of diet particle size (PS) increases feed efficiency due to an increase in the apparent total tract (ATTD) of GE. However, other effects of PS on the gut secretory function are not known. Therefore, the objective of this experiment was to measure the effect of diet composition (DC) and PS on nutrient digestibility, gastrointestinal hormones, total bile acids (TBA), total cholesterol and glucose concentrations in plasma of finishing pigs ( = 8/diet). Pigs were fed finely (374 ± 29 µm) or coarsely (631 ± 35 µm) ground corn-soybean meal (CSB), CSB + 35% corn dried distillers' grains with solubles (DDGS), and CSB with 21% soybean hulls (SBH) diets for 49 d...
June 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727038/genetic-correlations-between-wool-traits-and-carcass-traits-in-merino-sheep
#20
S I Mortimer, S Hatcher, N M Fogarty, J H J van der Werf, D J Brown, A A Swan, R H Jacob, G H Geesink, D L Hopkins, J E Hocking Edwards, E N Ponnampalam, K L Pearce, D W Pethick
Genetic correlations between 29 wool production and quality traits and 14 whole carcass measures and carcass component traits were estimated from the Information Nucleus of 8 flocks managed across a range of Australian sheep production environments and genetically linked. Wool data were from over 5,000 Merino progeny born over 5 yr, whereas carcass data were from over 1,200 wether progeny of over 176 sires, slaughtered at about 21 kg carcass weight, on average. Wool traits included yearling and adult records for wool weight, fiber diameter, fiber diameter variation, staple strength, scoured color, and visual scores for breech and body wrinkle...
June 2017: Journal of Animal Science
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