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https://www.readbyqxmd.com/read/29779244/diversity-of-epicotyl-dormancy-among-tropical-montane-forest-species-in-sri-lanka
#1
Yasoja S Athugala, K M G G Jayasuriya, A M T A Gunarathne, Carol C Baskin
Fruiting season of many Sri Lankan tropical montane species is not synchronized and may not occur when conditions are favorable for seedling establishment. We hypothesized that species with different fruiting seasons have different seed dormancy mechanisms to synchronize timing of germination with a favorable season for establishment. Using six species with different fruiting seasons, we tested this hypothesis. Germination and imbibition of intact and manually-scarified seeds were studied. Effect of GA3 on germination was examined...
May 20, 2018: Plant Biology
https://www.readbyqxmd.com/read/29778986/breaking-through-the-dilemma-of-whether-to-continue-nursing-newly-graduated-nurses-experiences-of-work-challenges
#2
Hwey-Fang Liang, Chun-Chih Lin, Kuang-Ming Wu
BACKGROUND: Newly graduated nurses (NGNs) often encounter unique work challenges. PURPOSE: To discover Taiwanese NGNs' experiences of work challenges. METHOD: An interpretive qualitative design was chosen. In-depth interviews were completed with 25 NGNs working in clinical settings in Taiwan. Data were analyzed using content analysis. RESULTS: The essential structure of NGNs' experiences of work challenges was described as struggling and breaking through the dilemma of deciding whether to continue nursing or quit...
May 4, 2018: Nurse Education Today
https://www.readbyqxmd.com/read/29778570/nitrated-t-helper-cell-epitopes-enhance-the-immunogenicity-of-her2-vaccine-and-induce-anti-tumor-immunity
#3
Hong Tian, Yu He, Xiaoda Song, Liangliang Jiang, Jianhua Luo, Yi Xu, Wanli Zhang, Xiangdong Gao, Wenbing Yao
Human epidermal growth factor receptor 2 (HER2) is an attractive target for cancer vaccine. However, autoimmune tolerance prevents vaccines based on HER2 protein from inducing long-lasting, highly effective anti-tumor immunity. In this study, we proved that the introduction of p-nitrophenylalanine in the universal T cell epitope (named NitraTh) enhances humoral immunity induced by B cell epitope and cellular immunity induced by CTL epitope. Moreover, this NitraTh epitope can work in both mouse and human immune system...
May 17, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29778533/casein-kinase-ii-phosphorylates-the-c-terminal-region-of-lif1-to-promote-the-lif1-xrs2-interaction-needed-for-non-homologous-end-joining
#4
Kenichiro Matsuzaki, Miki Shinohara
A DNA double strand break (DSB) is one of the most cytotoxic DNA lesions, but it can be repaired by non-homologous end joining (NHEJ) or by homologous recombination. The choice between these two repair pathways depends on the cell cycle stage. Although NHEJ constitutes a simple re-ligation reaction, the regulatory mechanism(s) controlling its activity has not been fully characterized. Lif1 is a regulatory subunit of the NHEJ-specific DNA ligase IV and interacts with Xrs2 of the MRX complex which is a key factor in DSB repair...
May 17, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29778410/paleo-oncology-taking-stock-and-moving-forward
#5
Casey L Kirkpatrick, Roselyn A Campbell, Kathryn J Hunt
This article serves as an introduction to the International Journal of Paleopathology's special issue, Paleo-oncology: Taking Stock and Moving Forward. Reflecting the goals of the special issue, this paper has been designed to provide an overview of the current state of paleo-oncology, to introduce new and innovative paleo-oncological research and ideas, and to serve as a catalyst for future discussions and progress. This paper begins with an overview of the paleo-oncological evidence that can be found in ancient remains, followed by a summary of significant paleo-oncological findings and methodological advances to date...
February 12, 2018: International Journal of Paleopathology
https://www.readbyqxmd.com/read/29778340/prospective-randomized-controlled-trial-of-polymer-cable-ties-versus-standard-wire-closure-of-midline-sternotomy
#6
Silvana F Marasco, Louise Fuller, Adam Zimmet, David McGiffin, Michael Seitz, Stephanie Ch'ng, Shivanand Gangahanumaiah, Michael Bailey
OBJECTIVE: Midline sternotomy remains the most common access incision for cardiac operations. Traditionally, the sternum is closed with stainless steel wires. Wires are well known to stretch and break, however, leading to pain, nonunion, and potential deep sternal wound infection. We hypothesized that biocompatible plastic cable ties would achieve a more rigid sternal fixation, reducing postoperative pain and analgesia requirements. METHODS: A prospective, randomized study compared the ZIPFIX (De Puy Synthes, West Chester, Pa) sternal closure system (n = 58) with standard stainless steel wires (n = 60)...
April 16, 2018: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29778280/influence-of-cataract-surgery-on-meibomian-gland-dysfunction
#7
A El Ameen, S Majzoub, G Vandermeer, P-J Pisella
PURPOSE: To evaluate the influence of cataract surgery on Meibomian gland dysfunction, in particular on postoperative functional symptoms. PATIENTS AND METHODS: Thirty patients who underwent cataract surgery were included in the study. A clinical examination (OSDI questionnaire, measurement of tear break-up time (TBUT), corneal staining, Meibomian gland expression test) and a paraclinical evaluation (Meibomian gland loss [MGL] measured using ImageJ on Meibography, conjunctival hyperemia and non-invasive keratograph break-up time [NIK-BUT]) were performed preoperatively and at 1month and 3months after phacoemulsification...
May 16, 2018: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/29778187/sensitivity-of-african-swine-fever-virus-asfv-to-heat-alkalinity-and-peroxide-treatment-in-presence-or-absence-of-porcine-plasma
#8
I D Kalmar, A B Cay, M Tignon
African swine fever virus (ASFV) is a highly resistant viraemic virus with devastating socio-economic impact. Its present epidemiology in Eastern Europe and Russia warrants increased biosecurity measures in Western Europe. This includes proactive precautions on traffic of pork products within and between areas that are officially free from ASF. Namely, delayed notification of clinical signs or introduction of a low-virulent strain in ASF-free areas could result in presence of ASFV in veterinary inspected pork and pork by-products...
June 2018: Veterinary Microbiology
https://www.readbyqxmd.com/read/29777803/an-isolate-of-potato-virus-x-capsid-protein-from-n-benthamiana-insights-from-homology-modeling-and-molecular-dynamics-simulation
#9
Neda Esfandiari, Yahya Sefidbakht
Since Potato Virus X (PVX) is easily transmitted mechanically between their hosts, its control is difficult. We have previously reported new isolate of this virus (PVX-Iran, GenBank Accession number FJ461343). However, the molecular basis of resistance breaking activity and its relation to capsid protein structure are still not well-understood. SDS-PAGE, ELISA, Western blot and RT-PCR molecular examinations were performed on the inoculated plants Nicotiana benthamiana. The pathological symptoms were related to the PVX isolate...
May 16, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29777599/immense-random-colocalization-revealed-by-automated-high-content-image-cytometry-seriously-questions-fish-as-gold-standard-for-detecting-eml4-alk-fusion
#10
Gábor Smuk, Tamás Tornóczky, László Pajor, Ilse Chudoba, Béla Kajtár, Veronika Sárosi, Gábor Pajor
EML4-ALK gene fusion (inv2(p21p23)) of non-small cell lung cancer (NSCLC) predisposes to tyrosine kinase inhibitor treatment. One of the gold standard diagnostics is the dual color (DC) break-apart (BA) FISH technique, however, the unusual closeness of the involved genes has been suggested to raise likelihood of random co-localization (RCL) of signals. Although this is suspected to decrease sensitivity (often to as low as 40-70%), the exact level and effect of RCL has not been revealed thus far. Signal distances were analyzed to the 0...
May 19, 2018: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/29777105/phenotypic-diversification-by-enhanced-genome-restructuring-after-induction-of-multiple-dna-double-strand-breaks
#11
Nobuhiko Muramoto, Arisa Oda, Hidenori Tanaka, Takahiro Nakamura, Kazuto Kugou, Kazuki Suda, Aki Kobayashi, Shiori Yoneda, Akinori Ikeuchi, Hiroki Sugimoto, Satoshi Kondo, Chikara Ohto, Takehiko Shibata, Norihiro Mitsukawa, Kunihiro Ohta
DNA double-strand break (DSB)-mediated genome rearrangements are assumed to provide diverse raw genetic materials enabling accelerated adaptive evolution; however, it remains unclear about the consequences of massive simultaneous DSB formation in cells and their resulting phenotypic impact. Here, we establish an artificial genome-restructuring technology by conditionally introducing multiple genomic DSBs in vivo using a temperature-dependent endonuclease TaqI. Application in yeast and Arabidopsis thaliana generates strains with phenotypes, including improved ethanol production from xylose at higher temperature and increased plant biomass, that are stably inherited to offspring after multiple passages...
May 18, 2018: Nature Communications
https://www.readbyqxmd.com/read/29777036/pol%C3%AE-a-y-family-translesion-synthesis-polymerase-promotes-cellular-tolerance-of-myc-induced-replication-stress
#12
Kiminori Kurashima, Takayuki Sekimoto, Tsukasa Oda, Tsuyoshi Kawabata, Fumio Hanaoka, Takayuki Yamashita
Growth of precancerous and cancer cells relies on their tolerance of oncogene-induced replication stress (RS). Translesion synthesis (TLS) plays an essential role in cellular tolerance of various types of RS and bypasses replication barriers by employing specialized polymerases. However, limited information is available about the role of TLS polymerases in oncogene-induced RS. Here, we report that Polη, a Y-family TLS polymerase, promotes cellular tolerance of Myc-induced RS. Polη was recruited to Myc-induced RS sites, and Polη depletion enhanced the Myc-induced slowing and stalling of replication forks and the subsequent generation of double-strand breaks (DSBs)...
May 18, 2018: Journal of Cell Science
https://www.readbyqxmd.com/read/29776765/effects-of-artificial-tear-treatment-on-corneal-epithelial-thickness-and-corneal-topography-findings-in-dry-eye-patients
#13
B Çakır, E Doğan, E Çelik, T Babashli, T Uçak, G Alagöz
PURPOSE: To investigate the effects of artificial tear treatment on central corneal epithelial thickness, and central, mid-peripheral and peripheral corneal thicknesses in patients with dry eye disease (DED). MATERIAL-METHODS: Patients with DED underwent ocular examinations, including Schirmer-2 test, slit lamp examination for tear break-up time (BUT), corneal topography (CT) for measuring mean central, mid-peripheral and peripheral corneal thickness values and anterior segment optic coherence tomography (AS-OCT) for obtaining central corneal epithelial thickness...
May 15, 2018: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/29776721/process-water-properties-from-hydrothermal-carbonization-of-chemical-sludge-from-a-pulp-and-board-mill
#14
Mikko Mäkelä, Julia Forsberg, Christer Söderberg, Sylvia H Larsson, Olli Dahl
Hydrothermal carbonization (HTC) can be used to break down sludge structure and generate carbonaceous hydrochar suitable for solid fuel or value-added material applications. The separation of char and the reaction medium however generates a filtrate, which needs to treated before potential discharge. Thus, this work determined filtrate properties based on HTC temperature and sludge moisture content and estimated the discharge emissions and the potential increase in analyte loads to an industrial wastewater treatment plant based on derived regression models...
May 15, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29776154/renormalization-group-study-of-the-nagel-schreckenberg-model
#15
Han Kheng Teoh, Ee Hou Yong
We study the phase transition from free flow to congested phases in the Nagel-Schreckenberg (NS) model by using the dynamically driven renormalization group (DDRG). The breaking probability p that governs the driving strategy is investigated. For the deterministic case p=0, the dynamics remain invariant in each renormalization-group (RG) transformation. Two fully attractive fixed points, ρ_{c}^{*}=0 and 1, and one unstable fixed point, ρ_{c}^{*}=1/(v_{max}+1), are obtained. The critical exponent ν which is related to the correlation length is calculated for various v_{max}...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776139/transition-between-inverse-and-direct-energy-cascades-in-multiscale-optical-turbulence
#16
V M Malkin, N J Fisch
Multiscale turbulence naturally develops and plays an important role in many fluid, gas, and plasma phenomena. Statistical models of multiscale turbulence usually employ Kolmogorov hypotheses of spectral locality of interactions (meaning that interactions primarily occur between pulsations of comparable scales) and scale-invariance of turbulent pulsations. However, optical turbulence described by the nonlinear Schrodinger equation exhibits breaking of both the Kolmogorov locality and scale-invariance. A weaker form of spectral locality that holds for multi-scale optical turbulence enables a derivation of simplified evolution equations that reduce the problem to a single scale modeling...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776115/electroclinic-effect-in-the-chiral-lamellar-%C3%AE-phase-of-a-lyotropic-liquid-crystal
#17
Marc D Harjung, Frank Giesselmann
In thermotropic chiral Sm-A^{*} phases, an electric field along the smectic layers breaks the D_{∞} symmetry of the Sm-A^{*} phase and induces a tilt of the liquid crystal director. This so-called electroclinic effect (ECE) was first reported by Garoff and Meyer in 1977 and attracted substantial scientific and technological interest due to its linear and submicrosecond electro-optic response [S. Garoff and R. B. Meyer, Phys. Rev. A 19, 338 (1979)0556-279110.1103/PhysRevA.19.338]. We now report the observation of an ECE in the pretransitional regime from a lyotropic chiral lamellar L_{α}^{*} phase into a lyo-Sm-C^{*} phase, the lyotropic analog to the thermotropic Sm-C^{*} phase which was recently discovered by Bruckner et al...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776102/spatial-solitons-and-stability-in-the-one-dimensional-and-the-two-dimensional-generalized-nonlinear-schr%C3%A3-dinger-equation-with-fourth-order-diffraction-and-parity-time-symmetric-potentials
#18
C G L Tiofack, F Ii Ndzana, A Mohamadou, T C Kofane
We investigate the existence and stability of solitons in parity-time (PT)-symmetric optical media characterized by a generic complex hyperbolic refractive index distribution and fourth-order diffraction (FOD). For the linear case, we demonstrate numerically that the FOD parameter can alter the PT-breaking points. For nonlinear cases, the exact analytical expressions of the localized modes are obtained both in one- and two-dimensional nonlinear Schrödinger equations with self-focusing and self-defocusing Kerr nonlinearity...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776058/phase-transitions-in-a-system-of-hard-y-shaped-particles-on-the-triangular-lattice
#19
Dipanjan Mandal, Trisha Nath, R Rajesh
We study the different phases and the phase transitions in a system of Y-shaped particles, examples of which include immunoglobulin-G and trinaphthylene molecules, on a triangular lattice interacting exclusively through excluded volume interactions. Each particle consists of a central site and three of its six nearest neighbors chosen alternately, such that there are two types of particles which are mirror images of each other. We study the equilibrium properties of the system using grand canonical Monte Carlo simulations that implement an algorithm with cluster moves that is able to equilibrate the system at densities close to full packing...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776053/fractal-dimension-of-interfaces-in-edwards-anderson-spin-glasses-for-up-to-six-space-dimensions
#20
Wenlong Wang, M A Moore, Helmut G Katzgraber
The fractal dimension of domain walls produced by changing the boundary conditions from periodic to antiperiodic in one spatial direction is studied using both the strong-disorder renormalization group algorithm and the greedy algorithm for the Edwards-Anderson Ising spin-glass model for up to six space dimensions. We find that for five or fewer space dimensions, the fractal dimension is lower than the space dimension. This means that interfaces are not space filling, thus implying that replica symmetry breaking is absent in space dimensions fewer than six...
March 2018: Physical Review. E
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