keyword
MENU ▼
Read by QxMD icon Read
search

Thall*

keyword
https://www.readbyqxmd.com/read/28929276/the-photosynthetic-responses-to-stocking-depth-and-algal-mat-density-in-the-farmed-seaweed-gracilaria-lemaneiformis-gracilariales-rhodophyta
#1
Heng Jiang, Dinghui Zou, Weizhou Chen, Yufeng Yang
The branches and mass of Gracilaria lemaneiformis increase with growth season, and the thalli sink to deeper depths with increasing biomass density during maricultivation. The changing depth and algal mat density may affect the physiology of the algae. In the present study, the photosynthetic behaviors regarding different biomass densities in G. lemaneiformis thalli collected from different stocking depths were determined, to examine how photosynthesis of this farmed alga was affected by the growth depths and algal mat densities...
September 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28928986/cholinergic-potentiation-of-restoration-of-visual-function-after-optic-nerve-damage-in-rats
#2
Mira Chamoun, Elena G Sergeeva, Petra Henrich-Noack, Shaobo Jia, Lisa Grigartzik, Jing Ma, Qing You, Frédéric Huppé-Gourgues, Bernhard A Sabel, Elvire Vaucher
Enhancing cortical plasticity and brain connectivity may improve residual vision following a visual impairment. Since acetylcholine plays an important role in attention and neuronal plasticity, we explored whether potentiation of the cholinergic transmission has an effect on the visual function restoration. To this end, we evaluated for 4 weeks the effect of the acetylcholinesterase inhibitor donepezil on brightness discrimination, visually evoked potentials, and visual cortex reactivity after a bilateral and partial optic nerve crush in adult rats...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28919684/molecular-screening-for-hemotropic-mycoplasmas-in-captive-barbary-sheep-ammotragus-lervia-in-southern-brazil
#3
Leonilda C Santos, Odilon Vidotto, Vivien M Morikawa, Nelson J R Santos, Thállitha S W J Vieira, Ivan R Barros Filho, Rafael F C Vieira, Alexander W Biondo
AIM: This study is part of an active surveillance program for monitoring animal health status in endangered species, and was conducted to screen captive Barbary sheep (Ammotragus lervia) for hemoplasma infection. MATERIALS AND METHODS: A total of 12 blood samples were collected, DNA extracted and further tested by a pan-hemoplasma polymerase chain reaction protocol. RESULTS: Animals were clinically healthy and not infested by ectoparasites...
August 2017: Veterinary World
https://www.readbyqxmd.com/read/28918289/effective-removal-of-trace-thallium-from-surface-water-by-nanosized-manganese-dioxide-enhanced-quartz-sand-filtration
#4
Xiaoliu Huangfu, Chengxue Ma, Jun Ma, Qiang He, Chun Yang, Jian Zhou, Jin Jiang, Yaan Wang
Thallium (Tl) has drawn wide concern due to its high toxicity even at extremely low concentrations, as well as its tendency for significant accumulation in the human body and other organisms. The need to develop effective strategies for trace Tl removal from drinking water is urgent. In this study, the removal of trace Tl (0.5 μg L(-1)) by conventional quartz sand filtration enhanced by nanosized manganese dioxide (nMnO2) has been investigated using typical surface water obtained from northeast China. The results indicate that nMnO2 enhanced quartz sand filtration could remove trace Tl(I) and Tl(III) efficiently through the adsorption of Tl onto nMnO2 added to a water matrix and onto nMnO2 attached on quartz sand surfaces...
September 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28913548/changes-in-histopathology-enzyme-activities-and-the-expression-of-relevant-genes-in-zebrafish-danio-rerio-following-long-term-exposure-to-environmental-levels-of-thallium
#5
Li-Ping Hou, Yang Yang, Hu Shu, Guang-Guo Ying, Jian-Liang Zhao, Yi-Bing Chen, Yong-Heng Chen, Gui-Zhen Fang, Xin Li, Ji-Sheng Liu
Thallium is a rare-earth element, but widely distributed in water environments, posing a potential risk to our health. This study was designed to investigate the chronic effects of thallium based on physiological responses, gene expression, and changes in the activity of relevant enzymes in adult zebra fish exposed to thallium at low doses. The endpoints assessed include mRNA expression of metallothionein (MT)2 and heat shock protein HSP70; enzymatic activities of superoxide dismutase (SOD) and Na(+)/K(+)-ATPase; and the histopathology of gill, gonad, and liver tissues...
September 14, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28892165/environment-and-host-identity-structure-communities-of-green-algal-symbionts-in-lichens
#6
Francesco Dal Grande, Gregor Rolshausen, Pradeep K Divakar, Ana Crespo, Jürgen Otte, Matthias Schleuning, Imke Schmitt
An understanding of how biotic interactions shape species' distributions is central to predicting host-symbiont responses under climate change. Switches to locally adapted algae have been proposed to be an adaptive strategy of lichen-forming fungi to cope with environmental change. However, it is unclear how lichen photobionts respond to environmental gradients, and whether they play a role in determining the fungal host's upper and lower elevational limits. Deep-coverage Illumina DNA metabarcoding was used to track changes in the community composition of Trebouxia algae associated with two phylogenetically closely related, but ecologically divergent fungal hosts along a steep altitudinal gradient in the Mediterranean region...
September 11, 2017: New Phytologist
https://www.readbyqxmd.com/read/28889276/thallium-toxicity-general-issues-neurological-symptoms-and-neurotoxic-mechanisms
#7
Laura Osorio-Rico, Abel Santamaria, Sonia Galván-Arzate
Thallium (Tl(+)) is a ubiquitous natural trace metal considered as the most toxic among heavy metals. The ionic ratio of Tl(+) is similar to that of potassium (K(+)), therefore accounting for the replacement of the latter during enzymatic reactions. The principal organelle damaged after Tl(+) exposure is mitochondria. Studies on the mechanisms of Tl(+) include intrinsic pathways altered and changes in antiapoptotic and proapoptotic proteins, cytochrome c, and caspases. Oxidative damage pathways increase after Tl(+) exposure to produce reactive oxygen species (ROS), changes in physical properties of the cell membrane caused by lipid peroxidation, and concomitant activation of antioxidant mechanisms...
2017: Advances in Neurobiology
https://www.readbyqxmd.com/read/28888144/previously-undescribed-fridooleanenes-and-oxygenated-labdanes-from-the-brown-seaweed-sargassum-wightii-and-their-protein-tyrosine-phosphatase-1b-inhibitory-activity
#8
Anusree Maneesh, Kajal Chakraborty
Previously undescribed fridooleanene triterpenoids 2α-hydroxy-(28,29)-frido-olean-12(13), 21(22)-dien-20-propyl-21-hex-4'(Z)-enoate, 2α-hydroxy-(28,29)-frido-olean-12(13), 21(22)-dien-20-prop-2(E)-en-21-butanoate and oxygenated labdane diterpenoids 2α-hydroxy-8(17), (12E), 14-labdatriene, 3β, 6β, 13α-tri hydroxy 8(17), 12E, 14-labdatriene were purified from the ethyl acetate-methanol and dichloromethane fractions of the air-dried thalli of Sargassum wightii (Sargassaceae), a brown seaweed collected from the Gulf-of-Mannar of Penninsular India...
September 6, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28887631/the-efficient-removal-of-thallium-from-sintering-flue-gas-desulfurization-wastewater-in-ferrous-metallurgy-using-emulsion-liquid-membrane
#9
Li Yang, Jiangping Xiao, Yi Shen, Xian Liu, Wensong Li, Weiyan Wang, Yunquan Yang
The removal of thallium ions in flue gas desulfurization wastewater from ferrous metallurgic industry was studied by emulsion liquid membrane (ELM) method using 2-ethylhexyl phosphoric acid-2-ethylhexyl ester (P507) as carrier, aviation kerosene (AK) as organic solvent, polyisobutylene succinimide (T154) as surfactant, polyisobutylene (PIB) as additive, and sulfuric acid as internal reagent. Some important influence parameters such as concentrations of carrier, surfactant and stripping agent, agitation speed, extraction time, volume ratios of feed solution to emulsion phase and internal phase to membrane phase, and their effects on the removal efficiency of Tl in the ELM process were investigated and optimized...
September 8, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28883416/purple-spot-damage-dynamics-investigated-by-an-integrated-approach-on-a-1244-a-d-parchment-roll-from-the-secret-vatican-archive
#10
Luciana Migliore, Maria Cristina Thaller, Giulia Vendittozzi, Astrid Yazmine Mejia, Fulvio Mercuri, Silvia Orlanducci, Alessandro Rubechini
Ancient parchments are commonly attacked by microbes, producing purple spots and detachment of the superficial layer. Neither standard cultivation nor molecular methods (DGGE) solved the issue: causative agents and colonization model are still unknown. To identify the putative causal agents, we describe the 16 S rRNA gene analysis (454-pyrosequencing) of the microbial communities colonizing a damaged parchment roll dated 1244 A.D. (A.A. Arm. I-XVIII 3328, Vatican Secret Archives). The taxa in damaged or undamaged areas of the same document were different...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28882594/terbinafine-is-a-novel-and-selective-activator-of-the-two-pore-domain-potassium-channel-task3
#11
Paul D Wright, Emma L Veale, David McCoull, David C Tickle, Jonathan M Large, Emma Ococks, Gemma Gothard, Catherine Kettleborough, Alistair Mathie, Jeffrey Jerman
Two-pore domain potassium channels (K2Ps) are characterized by their four transmembrane domain and two-pore topology. They carry background (or leak) potassium current in a variety of cell types. Despite a number of important roles there is currently a lack of pharmacological tools with which to further probe K2P function. We have developed a cell-based thallium flux assay, using baculovirus delivered TASK3 (TWIK-related acid-sensitive K(+) channel 3, KCNK9, K2P9.1) with the aim of identifying novel, selective TASK3 activators...
September 5, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28879543/apex-predatory-mammals-as-bioindicator-species-in-environmental-monitoring-of-elements-in-dinaric-alps-croatia
#12
Maja Lazarus, Ankica Sekovanić, Tatjana Orct, Slaven Reljić, Josip Kusak, Jasna Jurasović, Đuro Huber
Tissue element investigations of apex terrestrial mammals are very scarce in Europe. We quantified 16 essential and nonessential elements in the kidney cortex, liver, and muscle tissue of 467 brown bears (Ursus arctos), 125 gray wolves (Canis lupus), one Eurasian lynx (Lynx lynx), and three golden jackals (Canis aureus) from Croatia by inductively coupled plasma mass spectrometry (ICP-MS). Renal cadmium (0.6% of animals) and lead (1%) and hepatic lead (5%) were found in toxicologically relevant levels for mammals only in bears, while the other elements were within normal range...
September 6, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28879528/effects-of-chronic-kidney-disease-on-myocardial-washout-rate-of-thallium-201-in-patients-with-normal-myocardial-perfusion-on-single-photon-emission-computed-tomography
#13
Satoshi Kurisu, Yoji Sumimoto, Hiroki Ikenaga, Ken Ishibashi, Yukihiro Fukuda, Yasuki Kihara
BACKGROUND: Myocardial perfusion single photon emission computed tomography (SPECT) is often performed even in patients with chronic kidney disease (CKD). We assessed the effects of CKD on myocardial washout rate (WR) of thallium (Tl)-201 in patients with normal myocardial perfusion on SPECT. METHODS: Two hundred and fifty-six patients with normal myocardial perfusion were enrolled in this study. CKD was defined as estimated glomerular filtration rate (eGFR) <60 ml/min/1...
September 6, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28870123/bayesian-treatment-comparison-using-parametric-mixture-priors-computed-from-elicited-histograms
#14
Peter F Thall, Moreno Ursino, Véronique Baudouin, Corinne Alberti, Sarah Zohar
A Bayesian methodology is proposed for constructing a parametric prior on two treatment effect parameters, based on graphical information elicited from a group of expert physicians. The motivating application is a 70-patient randomized trial to compare two treatments for idiopathic nephrotic syndrome in children. The methodology relies on histograms of the treatment parameters constructed manually by each physician, applying the method of Johnson et al. (2010). For each physician, a marginal prior for each treatment parameter characterized by location and precision hyperparameters is fit to the elicited histogram...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/28866748/early-response-of-glutathione-and-thioredoxin-dependent-antioxidant-defense-systems-to-tl-i-and-tl-iii-mediated-oxidative-stress-in-adherent-pheochromocytoma-pc12adh-cells
#15
Lis C Puga Molina, Damiana M Salvatierra Fréchou, Sandra V Verstraeten
Thallium (Tl) is a toxic heavy metal that causes oxidative stress both in vitro and in vivo. In this work, we evaluated the production of oxygen (ROS)- and nitrogen (RNS)-reactive species in adherent PC12 (PC12adh) cells exposed for 0.5-6 h to Tl(I) or Tl(III) (10-100 µM). In this system, Tl(I) induced mostly H2O2 generation while Tl(III) induced H2O2 and ONOO(·-) generation. Both cations enhanced iNOS expression and activity, and decreased CuZnSOD expression but without affecting its activity. Tl(I) increased MnSOD expression and activity but Tl(III) decreased them...
September 2, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28834837/open-versus-closed-reduction-of-maxillary-fractures-complications-and-resource-utilization
#16
Yasmina Zoghbi, David J Gerth, Jun Tashiro, Albert Lee, Seth R Thaller
INTRODUCTION: Maxillary fractures are frequently managed depending on the surgeon's preferences, nature of the injury, presence of associated injuries, and comorbidities. Current literature advocates open reduction with plating versus closed techniques. However, data defining associated costs and complications comparing the 2 approaches remains lacking. METHODS: National Inpatient Sample (2006-2011) was examined for patients undergoing closed or open (76.73-76.74) reduction of maxillary fractures...
August 22, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28833820/identification-of-complexes-involving-tl-i-and-tl-iii-with-edta-and-dtpa-ligands-by-esi-ms
#17
Joanna Zembrzuska, Bozena Karbowska
RATIONALE: Thallium is considered as an environmental threat, however its hazardous properties depend on its oxidation state. Tl(III) is approx. 1000-times more toxic compared to Tl(I), therefore identification of each species is essential in order to properly evaluate the associated health hazard. ESI-MS allows determination of speciation in solution due to its soft mode of ionization while selective complexation with ligands allows to distinguish the Tl species. Selective complexation of Tl(I) and Tl(III) ions requires the use of two selective complexing agents and selection of appropriate conditions for this process...
August 21, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28833125/marginal-distribution-and-high-heterozygosity-of-asexual-caloglossa-vieillardii-delesseriaceae-rhodophyta-along-the-australian-coasts
#18
Mitsunobu Kamiya, Erika Saba, John A West
In animals and land plants, many asexual species originate through inter- or intraspecific crosses, and such heterozygous asexuals frequently are more abundant than their sexual relatives in marginal habitats. Although asexual species have been reported in various macroalgal taxa, detailed information regarding their distribution, heterozygosity, and origin is limited. Because many asexual tetrasporophyte strains of Caloglossa vieillardii have been isolated from South Australia, far from their core tropical habitats, we re-examined the distribution range of asexual C...
August 18, 2017: Journal of Phycology
https://www.readbyqxmd.com/read/28831321/cryosurgery-as-an-option-for-the-treatment-of-vascular-lesions-of-the-oral-cavity
#19
Pedro Thalles Bernardo de Carvalho Nogueira, Mariana Maria Castro Jatobá Remigio, Andreza Maria Correia de Queiroz, Andréia Aparecida da Silva, José Rodrigues Laureano Filho
Cryosurgery is a treatment modality consisting in the destruction of tissue by the application of extremely low temperatures. This causes irreversible damage to cellular metabolism, leading to tissue destruction within minutes, a mechanism that may be beneficial when used in diseased tissues. Because cryosurgery is effective, simple, and easy to perform, it has been used in the treatment of lesions in both medical and dental fields. This technique provides many advantages, such as easy operation, absence of intraoperative bleeding, and low infection rate...
2017: Case Reports in Otolaryngology
https://www.readbyqxmd.com/read/28822911/maullinia-braseltonii-sp-nov-rhizaria-phytomyxea-phagomyxida-a-cyst-forming-parasite-of-the-bull-kelp-durvillaea-spp-stramenopila-phaeophyceae-fucales
#20
Pedro Murúa, Franz Goecke, Renato Westermeier, Pieter van West, Frithjof C Küpper, Sigrid Neuhauser
Phytomyxea are obligate endoparasites of angiosperm plants and Stramenopiles characterised by a complex life cycle. Here Maullinia braseltonii sp. nov., an obligate parasite infecting the bull kelp Durvillaea (Phaeophyceae, Fucales) from the South-Eastern Pacific (Central Chile and Chiloe Island) and South-Western Atlantic (Falkland Islands, UK) is described. M. braseltonii causes distinct hypertrophies (galls) on the host thalli making it easily identifiable in the field. Sequence comparisons based on the partial 18S and the partial 18S-5...
July 13, 2017: Protist
keyword
keyword
111271
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"