keyword
MENU ▼
Read by QxMD icon Read
search

new species

keyword
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/28732229/a-novel-approach-to-fabricate-dye-encapsulated-polymeric-micro-and-nanoparticles-by-thin-film-dewetting-technique
#2
Manosree Chatterjee, Abhiram Hens, Kuldeep Mahato, Namita Jaiswal, Nivedita Mahato, Nagahanumaiah, Nripen Chanda
A new method is reported for fabrication of polymeric micro- and nanoparticles from an intermediate patterned surface originated by dewetting of a polymeric thin film. Poly (d, l-lactide-co-glycolide) or PLGA, a biocompatible polymer is used to develop a thin film over a clean glass substrate which dewets spontaneously in the micro-/nano-patterned surface of size range 50nm to 3.5µm. Since another water-soluble polymer, poly vinyl alcohol (PVA) is coated on the same glass substrate before PLGA thin film formation, developed micro-/nano-patterns are easily extracted in water in the form of micro- and nanoparticle mixture of size range 50nm to 3...
July 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28732163/diamines-can-initiate-new-particle-formation-in-the-atmosphere
#3
Jonas Elm, Monica Passananti, Theo Kurtén, Hanna Vehkamaki
Recent experimental evidence suggests that diamines can enhance atmospheric new particle formation more efficiently compared to monoamines such as dimethylamine. Here we investigate the molecular interactions between sulfuric acid (sa) and the di- amine putrescine (put) using computational methods. The molecular structure of up to four sulfuric acid molecules and up to four putrescine molecules were obtained at the ωB97X-D/6-31++G(d,p) level of theory. We utilized a domain local pair natural orbital coupled cluster method - DLPNO-CCSD(T)/aug-cc-pVTZ - to obtain highly accurate binding energies of the clusters...
July 21, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28732068/effects-of-liver-stage-clearance-by-primaquine-on-gametocyte-carriage-of-plasmodium-vivax-and-p-falciparum
#4
Rahel Wampfler, Natalie E Hofmann, Stephan Karl, Inoni Betuela, Benson Kinboro, Lina Lorry, Mariabeth Silkey, Leanne J Robinson, Ivo Mueller, Ingrid Felger
BACKGROUND: Primaquine (PQ) is the only currently licensed antimalarial that prevents Plasmodium vivax (Pv) relapses. It also clears mature P. falciparum (Pf) gametocytes, thereby reducing post-treatment transmission. Randomized PQ treatment in a treatment-to-reinfection cohort in Papua New Guinean children permitted the study of Pv and Pf gametocyte carriage after radical cure and to investigate the contribution of Pv relapses. METHODS: Children received radical cure with Chloroquine, Artemether-Lumefantrine plus either PQ or placebo...
July 21, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28731825/convergent-phenotypic-evolution-despite-contrasting-demographic-histories-in-the-fauna-of-white-sands
#5
Erica Bree Rosenblum, Christine E Parent, Eveline T Diepeveen, Clay Noss, Ke Bi
When are evolutionary outcomes predictable? Cases of convergent evolution can shed light on when, why, and how different species exhibit shared evolutionary trajectories. In particular, studying diverse species in a common environment can illuminate how different factors facilitate or constrain adaptive evolution. Here we integrate studies of pattern and process in the fauna at White Sands (New Mexico) to understand the determinants of convergent evolution. Numerous animal species at White Sands exhibit phenotypic convergence in response to a novel-and shared-selective environment: geologically young gypsum dunes...
August 2017: American Naturalist
https://www.readbyqxmd.com/read/28731593/synthesis-characterization-and-efficient-catalytic-activities-of-a-nickel-ii-porphyrin-remarkable-solvent-and-substrate-effects-on-participation-of-multiple-active-oxidants
#6
Cheal Kim, Hye Ahn, Jeong Bae, Min Kim, Kwon Bok, Ha Jeong, Suk Lee
A new nickel(II) porphyrin complex, [NiII(porp)] (1) has been synthesized and characterized by 1H NMR, 13C NMR and mass spectrometry analysis. This NiII porphyrin complex 1 catalyzed quantitatively the epoxidation reaction of a wide range of olefins with meta-chloroperoxybenzoic acid (MCPBA) under mild conditions. Reactivity and Hammett studies, H218O-exchange experiments, and the use of PPAA (peroxyphenylacetic acid) as a mechanistic probe suggested that participation of multiple active oxidants NiII-OOC(O)R 2, NiIV-Oxo 3, and NiIII-Oxo 4 in olefin epoxidation reactions by nickel porphyrin complex is markedly affected by solvent polarity and concentration and type of substrate...
July 21, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28731514/with-or-without-you-effects-of-the-concurrent-range-expansion-of-an-herbivore-and-its-natural-enemy-on-native-species-interactions
#7
David Carrasco, Gaylord A Desurmont, Diane Laplanche, Magali Proffit, Rieta Gols, Paul G Becher, Mattias C Larsson, Ted C J Turlings, Peter Anderson
Global climatic changes may lead to the arrival of multiple range-expanding species from different trophic levels into new habitats, either simultaneously or in quick succession, potentially causing the introduction of manifold novel interactions into native food webs. Unraveling the complex biotic interactions between native and range-expanding species is critical to understand the impact of climate change on community ecology, but experimental evidence is lacking. In a series of laboratory experiments that simulated direct and indirect species interactions, we investigated the effects of the concurrent arrival of a range-expanding insect herbivore in Europe, Spodoptera littoralis, and its associated parasitoid Microplitis rufiventris, on the native herbivore Mamestra brassicae, and its associated parasitoid M...
July 21, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28731467/uncultivated-microbes-in-need-of-their-own-taxonomy
#8
Konstantinos T Konstantinidis, Ramon Rosselló-Móra, Rudolf Amann
The great majority of microbial species remains uncultured, severely limiting their taxonomic characterization and thus communication among scientists. Although Candidatus was devised as a provisional category to classify uncultured taxa, it has not been widely accepted owing to technical limitations and lack of priority of Candidatus names in the official nomenclature. High-throughput sequencing provides the potential for data-rich taxonomic descriptions of uncultivated microbes, comparable in quality to those of cultured organisms...
July 21, 2017: ISME Journal
https://www.readbyqxmd.com/read/28731407/t-cell-receptor-repertoires-of-mice-and-humans-are-clustered-in-similarity-networks-around-conserved-public-cdr3-sequences
#9
Asaf Madi, Asaf Poran, Eric Shifrut, Shlomit Reich-Zeliger, Erez Greenstein, Irena Zaretsky, Tomer Arnon, Francois Van Laethem, Alfred Singer, Jinghua Lu, Peter D Sun, Irun R Cohen, Nir Friedman
Diversity of T cell receptor (TCR) repertoires, generated by somatic DNA rearrangements, is central to immune system function. However, the level of sequence similarity of TCR repertoires within and between species has not been characterized. Using network analysis of high-throughput TCR sequencing data, we found that abundant CDR3-TCRβ sequences were clustered within networks generated by sequence similarity. We discovered a substantial number of public CDR3-TCRβ segments that were identical in mice and humans...
July 21, 2017: ELife
https://www.readbyqxmd.com/read/28731229/macroscopic-polarization-enhancement-promoting-photo-and-piezoelectric-induced-charge-separation-and-molecular-oxygen-activation
#10
Hongwei Huang, Shuchen Tu, Chao Zeng, Tierui Zhang, A H Reshak, Yihe Zhang
We report that both efficient photo- and piezoelectric- induced molecular oxygen activation are achieved via macroscopic polarization enhancement on a noncentrosymmetric piezoelectric semiconductor BiOIO3. The replacement of V5+ ions for I5+ in IO3 polyhedra gives rise to strengthened macroscopic polarization of BiOIO3, which facilitates the charge separation in the photocatalytic and piezoelectric-catalytic process, and renders largely promoted photo- and piezoelectric induced reactive oxygen species (ROS) evolution, such as superoxide radicals (*O2-) and hydroxyl radicals (*OH)...
July 21, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28731112/carrier-free-self-assembled-pure-drug-nanorods-composed-of-10-hydroxycamptothecin-and-chlorin-e6-for-combinatorial-chemo-photodynamic-antitumor-therapy-in-vivo
#11
Yan Wen, Wei Zhang, Ningqiang Gong, Yi-Feng Wang, Hong-Bo Guo, Weisheng Guo, Paul C Wang, Xing-Jie Liang
Carrier-free nanodrugs formulated from the supramolecular self-assembly of pure drug molecules have emerged as an innovative and promising strategy for tumor therapy. We report herein a new and simple method to directly assemble a small hydrophobic anticancer drug, 10-hydroxycamptothecin (HCPT), with a photosensitizer chlorin e6 (Ce6) to form stable, discrete nanorods (NRs), which not only circumvent the extreme hydrophobicity of HCPT but also incorporate two different modalities into one delivery system for combination therapy...
July 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/28730992/an-illustrated-guide-for-characters-and-terminology-used-in-descriptions-of-phlebotominae-diptera-psychodidae
#12
Eunice A B Galati, Fredy Galvis-Ovallos, Phillip Lawyer, Nicole Léger, Jérôme Depaquit
Phlebotomine (Diptera, Psychodidae, Phlebotominae) taxonomy has been studied extensively, primarily due to the role of these flies as vectors of various parasites, including species of Leishmania, Bartonella and arboviruses that cause diseases in humans and other vertebrates. We present some topics discussed at a round-table on phlebotomine taxonomy held at the Ninth International Symposium on Phlebotomine Sandflies (ISOPS IX) in Reims, France, in June 2016. To date, approximately one thousand phlebotomine species have been described worldwide, although in varying languages and mostly without standardization of characters and terminology...
2017: Parasite: Journal de la Société Française de Parasitologie
https://www.readbyqxmd.com/read/28730956/review-on-bioorganometallic-chemistry-and-new-outcomes-in-the-synthesis-and-substitution-of-tetracarbonyl-pyrrolylimine-complexes-of-rhenium-with-organophosphorus-ligands
#13
Antoine Simonneau, Franck Le Bideau, Jean-Hugues Mirebeau, Jérôme Marrot, Gérard Jaouen
: After a short review dealing with bioorganometallic chemistry, the synthesis of tetracarbonyl (pyrrolylimine) complexes of rhenium bearing chirality on the pyrrolyl ligands was reported.The reactivity of these compounds towards the substitution of one carbonyl ligand with triphenyl phosphine, tricyclohexyl phosphine and trimethyl phosphite was studied. The rhenium becoming a stereogenic center in that transformation, the resulting tricarbonyl species were obtained as mixtures of diastereomers, with diastereomeric excesses varying from 8 to 84%, according to the reaction conditions and the relative steric hindrances of the pyrrolylimine and the organophosphorus ligands...
July 19, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28730859/molecular-targeting-of-inosine-5-monophosphate-dehydrogenase-by-ff-10501-promotes-erythropoiesis-via-ros-mapk-pathway
#14
Michiko Ichii, Kenji Oritani, Motohiko Murase, Kensuke Komatsu, Mao Yamazaki, Rie Kyoden, Nobuko Kito, Yusuke Nozaki, Motoki Saito, Hiroyuki Iwamura, Yuzuru Kanakura
One of the major symptoms of myelodysplastic syndromes (MDS) is severe cytopenia. Despite cytokine therapies, such as erythropoiesis-stimulating agents, many patients still require blood transfusions, and the development of new therapeutic approaches is needed. In this work, we studied the effects of the inosine-5'-monophosphate (IMP) dehydrogenase (IMPDH) inhibitor FF-10501 on erythropoiesis of human hematopoietic cells. Differentiation of K562 chronic myeloid leukemia cells to an erythroid lineage was promoted by FF-10501 in a dose-dependent manner...
July 21, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28730719/anticandidal-activity-of-extracts-and-a-novel-compound-amnomopin-isolated-from-petriella-setifera
#15
Amani S Awaad, Nour K Al-Aonazi, Monerah R Al-Othman, Mohamed E Zain, Reham M El-Meligy, Nabil El-Sayed
A novel triterpenoidal compound named 'amnomopin' (3β-diglucoside-5,12-28-oic acid), which is named IUPAC as 3-O-(2' ➔ 1″diglucoside)1,2,3,4,4a,5,6,6a,6b,7,9,10,11,12,12a,12b,13,14b-octadecahydro-10-hydroxy-2,2,6a,6b,9,9,12a-heptamethylpicene-4a-carboxylic acid, was isolated from the extract Petriella setifera. The total alcoholic extract of P. setifera showed a great activity against clinically isolated Candida species, including Candida albicans, Candida dubliniensis, Candida famata, Candida glabrata, Candida inconspicua, Candida kefyr, Candida krusei, Candida norvegensis, Candida parapsilosis and Candida tropicalis...
July 20, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28730564/a-new-approach-to-assess-occupational-exposure-to-airborne-fungal-contamination-and-mycotoxins-of-forklift-drivers-in-waste-sorting-facilities
#16
Carla Viegas, Tiago Faria, Ana Cebola de Oliveira, Liliana Aranha Caetano, Elisabete Carolino, Anita Quintal-Gomes, Magdalena Twarużek, Robert Kosicki, Ewelina Soszczyńska, Susana Viegas
The waste management industry is an important employer, and exposure of waste-handling workers to microorganisms is considered an occupational health problem. Besides fungal contamination, it is important to consider the co-occurrence of mycotoxins in this setting. Forklifts with closed cabinet and air conditioner are commonly used in waste industry to transport waste and other products within the facilities, possibly increasing the risk of exposure under certain conditions. The aim of this study was to assess the fungal contamination and mycotoxin levels in filters from the air conditioning system of forklift cabinets, as an indicator to assess occupational exposure of the drivers working in a waste sorting facility...
July 20, 2017: Mycotoxin Research
https://www.readbyqxmd.com/read/28730525/identification-of-a-seed-coat-specific-promoter-fragment-from-the-arabidopsis-mucilage-modified4-gene
#17
Gillian H Dean, Zhaoqing Jin, Lin Shi, Elahe Esfandiari, Robert McGee, Kylie Nabata, Tiffany Lee, Ljerka Kunst, Tamara L Western, George W Haughn
The Arabidopsis seed coat-specific promoter fragment described is an important tool for basic and applied research in Brassicaceae species. During differentiation, the epidermal cells of the Arabidopsis seed coat produce and secrete large quantities of mucilage. On hydration of mature seeds, this mucilage becomes easily accessible as it is extruded to form a tightly attached halo at the seed surface. Mucilage is composed mainly of pectin, and also contains the key cell wall components cellulose, hemicellulose, and proteins, making it a valuable model for studying numerous aspects of cell wall biology...
July 20, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28730513/element-repetition-rates-encode-functionally-distinct-information-in-pied-babbler-clucks-and-purrs
#18
Sabrina Engesser, Amanda R Ridley, Simon W Townsend
Human language is a recombinant system that achieves its productivity through the combination of a limited set of sounds. Research investigating the evolutionary origin of this generative capacity has generally focused on the capacity of non-human animals to combine different types of discrete sounds to encode new meaning, with less emphasis on meaning-differentiating mechanisms achieved through potentially simpler temporal modifications within a sequence of repeated sounds. Here we show that pied babblers (Turdoides bicolor) generate two functionally distinct vocalisations composed of the same sound type, which can only be distinguished by the number of repeated elements...
July 20, 2017: Animal Cognition
https://www.readbyqxmd.com/read/28730445/polycationic-probe-guided-nanopore-single-molecule-counter-for-selective-mirna-detection
#19
Kai Tian, Ruicheng Shi, Amy Gu, Michael Pennella, Li-Qun Gu
MicroRNAs (miRNAs) are a class of noncoding RNAs that are being explored as a new type of disease biomarkers. The nanopore single-molecule sensor offers a potential noninvasive tool to detect miRNAs for diagnostics and prognosis applications. However, one of the challenges that limits its clinical applications is the presence of a large variety of nontarget nucleic acids in the biofluid extracts. Upon interacting with the nanopore, nontarget nucleic acids produce "contaminative" nanopore signals that interfere with target miRNA discrimination, thus severely lowering the accuracy in target miRNA detection...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28730371/idiomarina-andamanensis-sp-nov-an-alkalitolerant-bacterium-isolated-from-andaman-sea-water
#20
Sherin Zachariah, Subrata K Das
Two closely related aerobic, Gram-negative rod shaped bacteria (strain W5(T) and W3) were isolated from Andaman Sea. Heterotrophic growth on marine agar was observed at 15-45 °C and pH 6-10. Strain W5(T) showed maximum 16S rRNA sequence similarity of 99.58% with Idiomarina marina JCM 15083(T). DNA fingerprinting analysis by ERIC-REP PCR, PFGE and MLSA revealed differences in banding patterns, also DNA-DNA hybridization values were well below 70% confirming W5(T) to be a new species. DNA G+C content was 46...
July 20, 2017: Antonie Van Leeuwenhoek
keyword
keyword
43120
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"