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Claudia Colesie, Burkhard Büdel, Vaughan Hurry, T G Allan Green
The Antarctic Peninsula, a tundra biome dominated by lichens and bryophytes, is an ecozone undergoing rapid temperature shifts. Such changes may demand a high physiological plasticity of the local lichen species in order for them to maintain their role as key drivers in this pristine habitat. This study examines the response of net photosynthesis and respiration to increasing temperatures for three Antarctic lichen species with different ecological response amplitudes. We hypothesise that negative effects caused by increased temperatures can be mitigated by thermal acclimation of respiration and/or photosynthesis...
November 15, 2017: Global Change Biology
Maryam Moeinian, Kamran Akhbari, Jaursup Boonmak, Sujittra Youngme
A new three-dimensional thallium(I) supramolecular polymer, [Tl2(μ2-ATA)]n (1), [H2ATA=2-aminoterephthalic acid], has been synthesized and characterized. The single-crystal X-ray data of compound 1 shows one type of Tl(I) ion with a low coordination number. Compound 1 was self-assembled from Tl⋯C, Tl⋯O and Tl⋯N secondary interactions in thallium(I) coordination and the active lone pair on Tl(I) in this compound may be involved in donor bonding. Two sides of the aromatic ring of ATA(2-) anion have been involved in two types of secondary Tl⋯C approaches...
March 2018: Ultrasonics Sonochemistry
Carolina A L Machado, Odilon Vidotto, Francisco O Conrado, Nelson J R Santos, Jessica D M Valente, Iago C Barbosa, Patrícia W S Trindade, João L Garcia, Alexander W Biondo, Thállitha S W J Vieira, Rafael F C Vieira
Although Mycoplasma ovis (formerly Eperythrozoon ovis) has been described in small ruminants worldwide, data on M. ovis in goats remain scarce. Accordingly, the aims of the present study were to i) determine the prevalence of hemoplasmas in goats, ii) identify the tick species parasitizing the animals, and iii) determine factors associated with infection in five dairy and three beef goat farms from the Paraíba State, northeastern Brazil. Blood samples were obtained from 402 goats. Samples were screened for hemoplasmas using a pan-hemoplasma PCR...
December 2017: Comparative Immunology, Microbiology and Infectious Diseases
Yutaka Shibata, Ahmed Mohamed, Koichiro Taniyama, Kentaro Kanatani, Makiko Kosugi, Hiroshi Fukumura
Some mosses are extremely tolerant of drought stress. Their high drought tolerance relies on their ability to effectively dissipate absorbed light energy to heat under dry conditions. The energy dissipation mechanism in a drought-tolerant moss, Bryum argenteum, has been investigated using low-temperature picosecond time-resolved fluorescence spectroscopy. The results are compared between moss thalli samples harvested in Antarctica and in Japan. Both samples show almost the same quenching properties, suggesting an identical drought tolerance mechanism for the same species with two completely different habitats...
November 9, 2017: Photosynthesis Research
M Thaller, H Böhm, C Lingenfelder, F Geiger
BACKGROUND: The increasing numbers of glaucoma patients and complications occuring during treatment, such as restenosis and hypotony, require new treatment options to prevent blindness in patients. Therefore, the abovementioned problems should be solved to prolong the lifetime of implants and to prevent repeated surgery. OBJECTIVE: Can a novel stent with hyaluronic acid hydrogels (HA gel) as a functional unit be used to regulate pressure in glaucoma therapy in the long term? MATERIAL AND METHODS: Model stents were filled with HA gels and it was investigated if these could regulate the pressure and what the underlying mechanism is...
November 8, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
Alice Rotini, Andrea Tornambè, Riccardo Cossi, Franco Iamunno, Giovanna Benvenuto, Maria T Berducci, Chiara Maggi, Maria C Thaller, Anna M Cicero, Loredana Manfra, Luciana Migliore
Bacteria are used in ecotoxicology for their important role in marine ecosystems and their quick, reproducible responses. Here we applied a recently proposed method to assess the ecotoxicity of nanomaterials on the ubiquitous marine bacterium Vibrio anguillarum, as representative of brackish and marine ecosystems. The test allows the determination of 6-h EC50 in a wide range of salinity, by assessing the reduction of bacteria actively replicating and forming colonies. The toxicity of copper oxide nanoparticles (CuO NPs) at different salinities (5-20-35 ‰) was evaluated...
2017: Frontiers in Microbiology
Richard V Dumilag, William George M Gallardo, Christian Philip C Garcia, YeaEun You, Alyssa Keren G Chaves, Lance Agahan
Members of the carrageenan-producing seaweeds of the genus Kappapphycus have a complicated taxonomic history particularly with regard to species identification. Many taxonomic challenges in this group have been currently addressed with the use of mtDNA sequences. The phylogenetic status and genetic diversity of one of the lesser known species, Kappaphycus cottonii, have repeatedly come into question. This study explored the genetic variation in Philippine K. cottonii using the mtDNA COI-5P gene and cox2-3 spacer sequences...
November 9, 2017: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
Piotr Osyczka, Piotr Boroń, Anna Lenart-Boroń, Kaja Rola
Phenotypic traits of lichens can be greatly modified by environmental factors. Granulose thalli on soil and podetia, densely covered with granules, referring to common and widespread lichen Cladonia cervicornis subsp. verticillata were found near zinc smelter. The granules are stratified, filled with fungal medulla and heavily encrusted with calcium oxalate weddellite crystals, not observed on regularly developed thalli of the species. Phylogenetic analysis revealed that deformed granulose forms belong to this taxon, showing that the phenotypic plasticity of the lichens of Cladonia can lead to the emergence of features that do not coincide with the taxonomic definition of the species...
November 5, 2017: Environmental Science and Pollution Research International
C Cattell, A Breneman, C Colpitts, J Dombeck, S Thaller, S Tian, J Wygant, J Fennell, M K Hudson, Robert Ergun, C T Russell, Roy Torbert, Per-Arne Lindqvist, J Burch
Observations from Magnetospheric MultiScale (~8 Re) and Van Allen Probes (~5 and 4 Re) show that the initial dayside response to a small interplanetary shock is a double-peaked dawnward electric field, which is distinctly different from the usual bipolar (dawnward and then duskward) signature reported for large shocks. The associated E × B flow is radially inward. The shock compressed the magnetopause to inside 8 Re, as observed by Magnetospheric MultiScale (MMS), with a speed that is comparable to the E × B flow...
September 16, 2017: Geophysical Research Letters
Lorenzo Fortuna, Elena Baracchini, Gianpiero Adami, Mauro Tretiach
Lichens belonging to Parmeliaceae are highly diversified, but most of them share an extremely conserved morpho-chemical trait: the lower cortex is heavily melanized. The adaptive value of this character is still uncertain. Melanins are ubiquitous compounds found in most organisms since they fulfil several biological functions including defense against UV radiation, oxidizing agents, microbial stress, and metal complexation. This work aims to establish whether melanization can affect the elemental content of lichen thalli...
November 3, 2017: Journal of Chemical Ecology
Christiane Thallinger, Thorsten Füreder, Matthias Preusser, Gerwin Heller, Leonhard Müllauer, Christoph Höller, Helmut Prosch, Natalija Frank, Rafal Swierzewski, Walter Berger, Ulrich Jäger, Christoph Zielinski
Immunotherapy by checkpoint inhibition is about to profoundly change cancer therapy. The number of indications are growing at an unprecedented speed. Clinical studies have demonstrated efficacy in a variety of solid tumors and in hematologic malignancies, although some clinical trials have produced negative results. Thus, it is fair to assume that there are obvious limitations and pitfalls in immunotherapy. Future concepts for combination treatment of immune checkpoint inhibitors have to be developed, but there is also urgent need for better and standardized biomarkers to identify those cancer patients who will benefit from treatment by checkpoint inhibition...
November 2, 2017: Wiener Klinische Wochenschrift
Anjuli Meiser, Jürgen Otte, Imke Schmitt, Francesco Dal Grande
The metagenome skimming approach, i.e. low coverage shotgun sequencing of multi-species assemblages and subsequent reconstruction of individual genomes, is increasingly used for in-depth genomic characterization of ecological communities. This approach is a promising tool for reconstructing genomes of facultative symbionts, such as lichen-forming fungi, from metagenomic reads. However, no study has so far tested accuracy and completeness of assemblies based on metagenomic sequences compared to assemblies based on pure culture strains of lichenized fungi...
November 2, 2017: Scientific Reports
Gustavo A Rubio, Leela S Mundra, Seth R Thaller
No abstract text is available yet for this article.
November 1, 2017: JAMA Surgery
Karla Suzana Moresco, Alexandre Kleber Silveira, Carlos Eduardo Schnorr, Fares Zeidán-Chuliá, Rafael Calixto Bortolin, Leonardo da Silva Bittencourt, Moara Mingori, Luana Heimfarth, Thallita Kelly Rabelo, Maurilio da Silva Morrone, Juliana Poglia Carini, Daniel Pens Gelain, Valquiria Linck Bassani, José Cláudio Fonseca Moreira
Achyrocline satureioides (AS, family Asteraceae) is a plant widely used in traditional medicine for stomach, digestive, and gastrointestinal disorders during pregnancy. Studies regarding the indiscriminate use of plant infusions during pregnancy are limited. Recent reports have shown that chronic flavonoid supplementation induces toxicity in vivo and raises the mortality rates of healthy subjects. Therefore, we investigated whether supplementation of pregnant and lactating Wistar rats with two AS inflorescence extracts, consisting of an aqueous (AQ) extract similar to a tea (47 mg·kg(-1)·day) and a hydroethanolic (HA) extract (35 mg·kg(-1)·day(-1)) with a higher flavonoid content, could induce redox-related side effects...
August 29, 2017: Biomedicines
Xuexia Huang, Ning Li, Qihang Wu, Jianyou Long, Dinggui Luo, Xiaowu Huang, Dongmei Li, Dongye Zhao
To investigate the bioavailability of thallium (Tl) in soil and rice in a Tl-contaminated area in Guangdong, China, the topsoil and rice samples were collected from 24 sampling sites and analyzed. Moreover, a modified sequential extraction procedure was applied to determine the different Tl fractions in the soil. The mean pH value of the soil samples was 4.50. The total Tl concentration in the paddy soil was about 4-8 times higher than the Canadian guideline value (1mgkg(-1)) for agricultural land uses. The mean ecological risk index of Tl was determined to be 483, indicating that potential hazard of the paddy soil was serious...
October 27, 2017: Ecotoxicology and Environmental Safety
Srinivas Jayanthi, Ravi Kumar Gundampati, Thallapuranam Krishnaswamy Suresh Kumar
Heparin, a member of the glycosaminoglycan family, is known to interact with more than 400 different types of proteins. For the past few decades, significant progress has been made to understand the molecular details involved in heparin-protein interactions. Based on the structural knowledge available from the FGF1-heparin interaction studies, we have designed a novel heparin-binding peptide (HBP) affinity tag that can be used for the simple, efficient, and cost-effective purification of recombinant proteins of interest...
November 1, 2017: Current Protocols in Protein Science
Carlo Sorce, Marco Persiano Leporatti, Mauro Lenzi
Seasonal changes of high density Chaetomorpha linum mats were studied in an eutrophic coastal lagoon. We measured biomass and specific growth rate and analyzed water quality, sediment labile organic matter (LOM), photosynthetic efficiency and pigments in two areas: one subjected to sediment resuspension and algal mass shuffling through specific boats and the other left undisturbed. Low disturbance enhanced algal survival under critical summer conditions, by reducing LOM and promoting growth through thalli fragmentation...
October 28, 2017: Marine Pollution Bulletin
Timothy J Entwisle, Joshua R Evans, Morgan L Vis, Gary W Saunders
A new genus, Ottia, and family, Ottiaceae, are proposed within the Acrochaetiales to accommodate the uniseriate red algal endophyte of batrachspermalean taxa previously named Balbiania meiospora. Prior to this study Balbiania investiens was transferred to its own family and order (Balbianiales) based on comparative DNA sequence data and a distinctive reproductive morphology. However, the second species described in this genus, Balbiania meiospora, continued to be treated as a species of Audouinella (A. meiospora) pending further investigation...
October 30, 2017: Journal of Phycology
Satoshi Kurisu, Yoji Sumimoto, Hiroki Ikenaga, Ken Ishibashi, Yukihiro Fukuda, Yasuki Kihara
BACKGROUND: Even intermediate QRS prolongation without bundle branch block is associated with worse clinical outcome after myocardial infarction (MI). We assessed the association of QRS duration with left ventricular (LV) volume and ejection fraction after anterior MI by using quantitative gated single photon emission computed tomography (SPECT). METHODS: Eighty-two patients with prior anterior MI were enrolled. Intermediate QRS prolongation was defined as QRS duration ≥100 ms without bundle branch block...
October 26, 2017: Acta Cardiologica
Samie Salehi, Amir Sh Saljooghi, Somayeh Badiee, Mojtaba Mashmool Moqadam
Thallium and its compounds are a class of highly toxic chemicals that cause wide-ranging symptoms such as gastrointestinal disturbances; polyneuritis; encephalopathy; tachycardia; skin eruptions; hepatic, renal, cardiac, and neurological toxicities; and have mutagenic and genotoxic effects. The present research aimed to evaluate the efficacy of the chelating agents deferasirox (DFX) and deferiprone (L1) in reducing serum and tissue thallium levels after the administration of thallium (III), according to two different dosing regimens, to several groups of Wistar rats for 60 days...
October 2017: Toxicological Research
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