keyword
MENU ▼
Read by QxMD icon Read
search

high light stress

keyword
https://www.readbyqxmd.com/read/28073052/deciduous-neonatal-line-width-is-associated-with-duration-of-delivery
#1
Jaana Hurnanen, Vivian Visnapuu, Matti Sillanpää, Eliisa Löyttyniemi, Jaana Rautava
The delivery-related neonatal line (NNL) appears into the enamel of primary teeth and first permanent molars at birth and is a marker of live birth process. It varies in width and its location, is different in each deciduous tooth type, and is indicative of gestation time. It is unclear which triggers determine NNL at birth. Our objective was to investigate the effect of the duration and mode of delivery on NNL width. NNL of 129 teeth, a collection derived from a long-term, prospectively followed population cohort, was measured under light microscope...
December 21, 2016: Forensic Science International
https://www.readbyqxmd.com/read/28069780/a-chlorophyll-fluorescence-based-method-for-the-integrated-characterization-of-the-photophysiological-response-to-light-stress
#2
João Serôdio, William Schmidt, Silja Frankenbach
This work introduces a new experimental method for the comprehensive description of the physiological responses to light of photosynthetic organisms. It allows the integration in a single experiment of the main established manipulative chlorophyll fluorescence-based protocols. It enables the integrated characterization of the photophysiology of samples regarding photoacclimation state (generating non-sequential light-response curves of effective PSII quantum yield, electron transport rate or non-photochemical quenching), photoprotection capacity (running light stress-recovery experiments, quantifying non-photochemical quenching components) and the operation of photoinactivation and photorepair processes (measuring rate constants of photoinactivation and repair for different light levels and the relative quantum yield of photoinactivation)...
January 9, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28069513/structure-and-mechanical-implications-of-the-pectoral-fin-skeleton-in-the-longnose-skate-chondrichthyes-batoidea
#3
Wei Huang, Watcharapong Hongjamrassilp, Jae-Young Jung, Philip A Hastings, Vlado A Lubarda, Joanna McKittrick
Animal propulsion systems are believed to show high energy and mechanical efficiency in assisting movement compared to artificial designs. As an example, batoid fishes have very light cartilaginous skeletons that facilitate their elegant swimming via enlarged wing-like pectoral fins. The aim of this work is to illustrate the hierarchical structure of the pectoral fin of a representative batoid, the Longnose Skate (Raja rhina), and explain the mechanical implications of its structural design. At the macro level, the pectoral fins are comprised of radially oriented fin rays, formed by staggered mineralized skeletal elements stacked end-to-end...
January 6, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28068120/daily-associations-between-ptsd-drinking-and-self-appraised-alcohol-related-problems
#4
Sarah M Wilson, Marketa Krenek, Paul A Dennis, Samantha S Yard, Kendall C Browne, Tracy L Simpson
Alcohol dependence (AD) and posttraumatic stress disorder (PTSD) are highly comorbid, yet limited research has focused on PTSD and daily drinking as they relate to self-appraised alcohol-related problems. In treatment contexts, patients' appraisals of alcohol-related problems have implications for assessment, intervention strategies, and prognosis. This study investigated the moderating effect of within-person (daily symptoms) and between-person (overall severity) differences in PTSD on the association between daily drinking and same-day alcohol-related problems...
January 9, 2017: Psychology of Addictive Behaviors: Journal of the Society of Psychologists in Addictive Behaviors
https://www.readbyqxmd.com/read/28067798/dark-and-photoinduced-cytotoxic-activity-of-the-new-chlorophyll-a-derivatives-with-oligoethylene-glycol-substituents-on-the-periphery-of-their-macrocycles
#5
Yana I Pylina, Dmitry M Shadrin, Oksana G Shevchenko, Olga M Startseva, Igor O Velegzhaninov, Dmitry V Belykh, Ilya O Velegzhaninov
In the present work, we investigated the dark and photoinduced cytotoxic activity of the new chlorophyll-a derivatives which contain the substituents of oligoethylene glycol on the periphery of their macrocycles. These compounds were tested using human cell lines to estimate their potential as photosensitizers for photodynamic therapy of cancer. It was shown that all the tested compounds have expressed photoinduced cytotoxic activity in vitro. Detailed study of the biological activity of one of the most perspective compound in this series-pyropheophorbide-a 17-diethylene glycol ester (Compound 21) was performed...
January 5, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28064133/microalgae-cultivation-in-urban-wastewater-coelastrum-cf-pseudomicroporum-as-a-novel-carotenoid-source-and-a-potential-microalgae-harvesting-tool
#6
Bárbara Úbeda, José Ángel Gálvez, Mónica Michel, Ana Bartual
The aim of this work was to study the optimal growth and high value-added production of the microalgae Coelastrum cf. pseudomicroporum Korshikov cultivated in urban wastewater. It was observed that C. cf. pseudomicroporum grew ideally in this medium, acting as an efficient nutrient starver. Additionally, the obtained biomass increased carotenoid cell content after saltwater stress. The effects of light intensity and salt stress on its growth rate were analysed. The results showed that this alga can grow very fast using wastewater as culture medium, reaching maximum growth rates of 1...
December 30, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/28060350/2-methacryloyloxyethyl-phosphorylcholine-polymer-treatment-of-complete-dentures-to-inhibit-denture-plaque-deposition
#7
Kenji Ikeya, Miya Fukunishi, Fuminori Iwasa, Yuuki Inoue, Kazuhiko Ishihara, Kazuyoshi Baba
Removable dentures made of poly (methyl methacrylate) (PMMA) are prone to bacterial adherence and dental plaque formation, which is called denture plaque. Denture plaque-associated infection is a source of serious dental and medical complications in the elderly. 2-Methacryloyloxyethyl phosphorylcholine (MPC) is a well-known biomedical material that exhibits marked antithrombogenicity and tissue compatibility because of its high resistance to protein adsorption and cell adhesion. Therefore, MPC polymer coatings are suggested to have the potential to inhibit plaque deposition on the surface of PMMA dentures...
December 26, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28057763/the-ultrastructural-organization-of-actin-and-myosin-ii-filaments-in-the-contractile-ring-new-support-for-an-old-model-of-cytokinesis
#8
John H Henson, Casey E Ditzler, Aphnie Germain, Patrick M Irwin, Eric T Vogt, Shucheng Yang, Xufeng Wu, Charles B Shuster
Despite recent advances in our understanding of the components and spatial regulation of the contractile ring (CR), the precise ultrastructure of actin and myosin II within the animal cell CR remains an unanswered question. We employed super-resolution light microscopy and platinum replica transmission electron microscopy (TEM) to determine the structural organization of actin and myosin II in isolated cortical cytoskeletons prepared from dividing sea urchin embryos. 3D structured illumination microscopy (SIM) indicated that within the CR, actin and myosin II filaments were organized into tightly packed linear arrays oriented along the axis of constriction, and restricted to a narrow zone within the furrow...
January 5, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28054942/a-comprehensive-proteomic-survey-of-aba-induced-protein-phosphorylation-in-rice-oryza-sativa-l
#9
Jiehua Qiu, Yuxuan Hou, Yifeng Wang, Zhiyong Li, Juan Zhao, Xiaohong Tong, Haiyan Lin, Xiangjin Wei, Hejun Ao, Jian Zhang
abscisic acid (ABA) is a key phytohormone regulating plant development and stress response. The signal transduction of ABA largely relies on protein phosphorylation. However; little is known about the phosphorylation events occurring during ABA signaling in rice thus far. By employing a label-free; MS (Mass Spectrometry)-based phosphoproteomic approach; we identified 2271 phosphosites of young rice seedlings and their intensity dynamics in response to ABA; during which 1060 proteins were found to be differentially phosphorylated...
January 3, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28053594/comparative-morphological-and-anatomical-characters-of-cakile-arabica-from-different-habitat-in-eastern-region-of-saudi-arabia
#10
Wafa'a A Al-Taisan, Dalia G Gabr
Morphological, anatomical and physiological plasticity was examined for Cakile arabica from three different sites at the coastal part of the Arabian Gulf near Ad Dammam city in the eastern region of Saudi Arabia. Morphological investigation showed that the size and number of lobes of the leaves are increased in sites (I) which have high salt stress. Also anatomical investigation using a light microscope showed that the plant is adaptive for salt stress by increasing the thickening of the cuticle or epidermis layer and increase in the area of vascular bundles...
January 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28050661/molecular-characterisation-of-a-dreb-gene-from-sophora-moorcroftiana-an-endemic-species-of-plateau
#11
Huie Li, Yanfu Zhang, Qiqiang Guo, Weijie Yao
Various plant species in the Qinghai-Tibet Plateau exposed to harsh conditions, such as low oxygen, drought, extremely low temperatures and salinity, have evolved both molecular and physiological adaptation strategies to deal with these multiple stresses. Sophora moorcroftiana (Benth.) Baker (Fabaceae) is a highly drought-resistant endemic Sophora shrub species in the Qinghai-Tibet Plateau. In our previous study, a drought-induced DREB transcription factor gene was identified and was designated as SmDREB1. SmDREB1-GFP fusion construct was introduced into Arabidopsis protoplast to characterise the function of SmDREB1 in drought resistance...
January 3, 2017: Protoplasma
https://www.readbyqxmd.com/read/28044463/silver-nanoparticles-induced-reactive-oxygen-species-via-photosynthetic-energy-transport-imbalance-in-an-aquatic-plant
#12
Hong Sheng Jiang, Li Yan Yin, Na Na Ren, Su Ting Zhao, Zhi Li, Yongwei Zhi, Hui Shao, Wei Li, Brigitte Gontero
The rapid growth in silver nanoparticles (AgNPs) commercialization has increased environmental exposure, including aquatic ecosystem. It has been reported that the AgNPs have damaging effects on photosynthesis and induce oxidative stress, but the toxic mechanism of AgNPs is still a matter of debate. In the present study on the model aquatic higher plant Spirodela polyrhiza, we found that AgNPs affect photosynthesis and significantly inhibit Photosystem II (PSII) maximum quantum yield (Fv/Fm) and effective quantum yield (ΦPSII)...
January 3, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28044345/multifaceted-role-of-cycling-dof-factor-3-cdf3-in-the-regulation-of-flowering-time-and-abiotic-stress-responses-in-arabidopsis
#13
Alba-Rocio Corrales, Laura Carrillo, Pilar Lasierra, Sergio G Nebauer, Jose Dominguez-Figueroa, Begoña Renau-Morata, Stephan Pollmann, Antonio Granell, Rosa-Victoria Molina, Jesús Vicente-Carbajosa, Joaquín Medina
DOF (DNA-binding with one finger)-type transcription factors are involved in many fundamental processes in higher plants, from responses to light and phytohormones to flowering time and seed maturation, but their relation with abiotic stress tolerance is largely unknown. Here, we identify the roles of CDF3, an Arabidopsis DOF gene in abiotic stress responses and developmental processes like flowering time. CDF3 is highly induced by drought, extreme temperatures and abscisic acid treatment. The CDF3 T-DNA insertion mutant cdf3-1 is much more sensitive to drought and low temperature stress, whereas CDF3 overexpression enhances the tolerance of transgenic plants to drought, cold and osmotic stress and promotes late flowering...
January 3, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28039755/myosin-phosphorylation-on-stress-fibers-predicts-contact-guidance-behavior-across-diverse-breast-cancer-cells
#14
Juan Wang, Ian C Schneider
During cancer progression the extracellular matrix is remodeled, forming aligned collagen fibers that proceed radially from the tumor, resulting in invasion. We have recently shown that different invasive breast cancer cells respond to epitaxially grown, aligned collagen fibrils differently. This article develops insight into why these cells differ in their contact guidance fidelity. Small changes in contractility or adhesion dramatically alter directional persistence on aligned collagen fibrils, while migration speed remains constant...
November 28, 2016: Biomaterials
https://www.readbyqxmd.com/read/28029133/cinnamaldehyde-ameliorates-cadmium-inhibited-root-elongation-in-tobacco-seedlings-via-decreasing-endogenous-hydrogen-sulfide-production
#15
Xie-Feng Ye, Yanfeng Xue, Tianxiao Ling, Yong Wang, Xiao-Na Yu, Changxin Cheng, Guosheng Feng, Liangbin Hu, Zhiqi Shi, Jian Chen
Cinnamaldehyde (CA) is natural plant-derived compound that has been highly appreciated for its medicinal properties. However, little information is known about the regulation of plant intrinsic physiology by CA. To address these gaps, physiological, histochemical, and biochemical approaches were applied to investigate CA-facilitated cadmium (Cd) tolerance in the roots of tobacco (Nicotiana tabacum) seedlings. Treatment with CdCl₂ at 20 μM for 72 h resulted in the significant decrease in root elongation by 40...
December 24, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28028848/functional-pyrimidine-based-thermally-activated-delay-fluorescence-emitters-photophysics-mechanochromism-and-fabrication-of-organic-light-emitting-diodes
#16
Paramaguru Ganesan, Revathi Ranganathan, Yun Chi, Xiao-Ke Liu, Chun-Sing Lee, Shih-Hung Liu, Gene-Hsiang Lee, Tzu-Chieh Lin, Yi-Ting Chen, Pi-Tai Chou
A new series of molecules T1-T4 possessing thermally activated delay fluorescence (TADF) have been strategically designed and synthesized. T1-T4 bear the dimethyl acridine as the electron donor, which is linked to either symmetrical or unsymmetrical diphenyl pyrimidine as an acceptor. In comparison to the ubiquitous triazine acceptor, the selection of pyrimidine as an acceptor takes its advantage of facile functionalization and less stabilized unoccupied π-orbitals so that the energy gap toward blue can be accessed...
December 28, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28027591/tm6sf2-rs58542926-impacts-lipid-processing-in-liver-and-small-intestine
#17
Elizabeth A O'Hare, Rongze Yang, Laura Yerges-Armstrong, Urmilla Sreenivasan, Rebecca McFarland, Carmen C Leitch, Meredith H Wilson, Shilpa Narina, Alexis Gorden, Kathy Ryan, Alan R Shuldiner, Steve A Farber, G Craig Wood, Christopher D Still, Glenn S Gerhard, Janet D Robishaw, Carole Sztalryd, Norann A Zaghloul
: The transmembrane 6 superfamily member 2 (TM6SF2) loss-of-function variant, rs58542926, is a genetic risk factor for nonalcoholic fatty liver disease and progression to fibrosis, but is paradoxically associated with lower levels of hepatic-derived triglyceride-rich lipoproteins (TRLs). TM6SF2 is expressed predominately in liver and small intestine, sites for triglyceride rich lipoprotein biogenesis and export. In light of this, we hypothesized that TM6SF2 may exhibit analogous effects on both liver and intestine lipid homeostasis...
December 27, 2016: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28018376/polychromatic-supplemental-lighting-from-underneath-canopy-is-more-effective-to-enhance-tomato-plant-development-by-improving-leaf-photosynthesis-and-stomatal-regulation
#18
Yu Song, Chengyao Jiang, Lihong Gao
Light insufficient stress caused by canopy interception and mutual shading is a major factor limiting plant growth and development in intensive crop cultivation. Supplemental lighting can be used to give light to the lower canopy leaves and is considered to be an effective method to cope with low irradiation stress. Leaf photosynthesis, stomatal regulation, and plant growth and development of young tomato plants were examined to estimate the effects of supplemental lighting with various composite spectra and different light orientations...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28017595/brain-prolactin-is-involved-in-stress-induced-rem-sleep-rebound
#19
Ricardo Borges Machado, Murilo Ramos Rocha, Deborah Suchecki
REM sleep rebound is a common behavioural response to some stressors and represents an adaptive coping strategy. Animals submitted to multiple, intermittent, footshock stress (FS) sessions during 96h of REM sleep deprivation (REMSD) display increased REM sleep rebound (when compared to the only REMSD ones, without FS), which is correlated to high plasma prolactin levels. To investigate whether brain prolactin plays a role in stress-induced REM sleep rebound two experiments were carried out. In experiment 1, rats were either not sleep-deprived (NSD) or submitted to 96h of REMSD associated or not to FS and brains were evaluated for PRL immunoreactivity (PRL-ir) and determination of PRL concentrations in the lateral hypothalamus and dorsal raphe nucleus...
December 23, 2016: Hormones and Behavior
https://www.readbyqxmd.com/read/28013367/actin-polymerization-plays-a-significant-role-in-asbestos-induced-inflammasome-activation-in-mesothelial-cells-in-vitro
#20
Maximilian MacPherson, Catherine Westbom, Helen Kogan, Arti Shukla
Asbestos exposure leads to malignant mesothelioma (MM), a deadly neoplasm of mesothelial cells of various locations. Although there is no doubt about the role of asbestos in MM tumorigenesis, mechanisms are still not well explored. Recently, our group demonstrated that asbestos causes inflammasome priming and activation in mesothelial cells, which in part is dependent on oxidative stress. Our current study sheds light on yet another mechanism of inflammasome activation by asbestos. Here we show the role of actin polymerization in asbestos-induced activation of the nod-like receptor pyrin domain-containing protein 3 (NLRP3) inflammasome...
December 24, 2016: Histochemistry and Cell Biology
keyword
keyword
98442
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"