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https://www.readbyqxmd.com/read/29457979/the-samholides-swinholide-related-metabolites-from-a-marine-cyanobacterium-cf-phormidium-sp
#1
Yiwen Tao, Pinglin Li, Daojing Zhang, Evgenia Glukhov, Lena Gerwick, Chen Zhang, Thomas F Murray, William H Gerwick
Cancer cell cytotoxicity was used to guide the isolation of nine new swinholide-related compounds, named samholides A-I (1-9), from an American Samoan marine cyanobacterium cf. Phormidium sp. Their structures were determined by extensive analysis of 1D and 2D NMR spectroscopic data. The new compounds share an unusual 20-demethyl 44-membered lactone ring comprised of two monomers, and they demonstrate structural diversity arising from geometric isomerization of double bonds, sugar units with unique glyceryl moieties and varied methylation patterns...
February 19, 2018: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29457700/impact-of-home-spirometry-on-medication-adherence-among-adolescents-with-cystic-fibrosis
#2
Aarti Shakkottai, Niko Kaciroti, Lauren Kasmikha, Samya Z Nasr
OBJECTIVE: Medication adherence among adolescents with cystic fibrosis (CF) is often suboptimal and this has significant impact on their health and quality of life. The purpose of the study was to evaluate the impact of frequent home pulmonary function (PFT) monitoring on medication adherence among adolescents with CF. HYPOTHESIS: We hypothesized that weekly home PFT monitoring will improve adherence while not significantly adding to the treatment burden. METHODS: Individuals aged 12-21 years with CF were provided a spirometer to measure PFTs weekly for 1 year...
February 19, 2018: Pediatric Pulmonology
https://www.readbyqxmd.com/read/29457316/assessment-of-pulmonary-structure-function-relationships-in-young-children-and-adolescents-with-cystic-fibrosis-by-multivolume-proton-mri-and-ct
#3
Francesca Pennati, David J Roach, John P Clancy, Alan S Brody, Robert J Fleck, Andrea Aliverti, Jason C Woods
BACKGROUND: Lung disease is the most frequent cause of morbidity and mortality in patients with cystic fibrosis (CF), and there is a shortage of sensitive biomarkers able to regionally monitor disease progression and to assess early responses to therapy. PURPOSE: To determine the feasibility of noncontrast-enhanced multivolume MRI, which assesses intensity changes between expiratory and inspiratory breath-hold images, to detect and quantify regional ventilation abnormalities in CF lung disease, with a focus on the structure-function relationship...
February 19, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29457308/single-carbon-fibers-with-a-macroscopic-thickness-3d-highly-porous-carbon-nanotube-coating
#4
Mingchu Zou, Wenqi Zhao, Huaisheng Wu, Hui Zhang, Wenjing Xu, Liusi Yang, Shiting Wu, Yunsong Wang, Yijun Chen, Lu Xu, Anyuan Cao
Carbon fiber (CF) grafted with a layer of carbon nanotubes (CNTs) plays an important role in composite materials and other fields; to date, the applications of CNTs@CF multiscale fibers are severely hindered by the limited amount of CNTs grafted on individual CFs and the weak interfacial binding force. Here, monolithic CNTs@CF fibers consisting of a 3D highly porous CNT sponge layer with macroscopic-thickness (up to several millimeters), which is directly grown on a single CF, are fabricated. Mechanical tests reveal high sponge-CF interfacial strength owing to the presence of a thin transitional layer, which completely inhibits the CF slippage from the matrix upon fracture in CNTs@CF fiber-epoxy composites...
February 19, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29457161/a-self-supported-amorphous-ni-p-alloy-on-a-cuo-nanowire-array-an-efficient-3d-electrode-catalyst-for-water-splitting-in-alkaline-media
#5
Bing Chang, Shuai Hao, Zhixiang Ye, Yingchun Yang
Energy-efficient electrochemical water splitting is one important way to produce hydrogen fuel but still faces many challenges. In this communication, we report that an amorphous Ni-P alloy shell electrodeposited on a CuO nanowire array supported on copper foam (CuO@Ni-P NA/CF) can be used for efficient water splitting in alkaline media. As a 3D catalytic electrode, it exhibits excellent activity both for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) with overpotentials of 106 mV for HER and 275 mV for OER to achieve a current density of 30 mA cm-2 in 1...
February 19, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29455678/cryptic-species-and-their-utilization-of-indigenous-and-non-indigenous-intermediate-hosts-in-the-acanthocephalan-polymorphus-minutus-sensu-lato-polymorphidae
#6
Maike Zittel, Daniel Grabner, Andre Wlecklik, Bernd Sures, Florian Leese, Horst Taraschewski, Alexander Martin Weigand
The bird-infecting acanthocephalan Polymorphus minutus has been suggested to comprise different lineages or even cryptic species using different intermediate hosts. To clarify this open question, we investigated Polymorphus cf. minutus cystacanths originating from amphipod intermediate hosts from 27 sites in Germany and France. Parasites and hosts were identified using integrated datasets (COI and/or morphology for hosts and COI + ITS1-5.8S-ITS2 for parasites). Mitochondrial and nuclear data (ITS1) strongly support the existence of three cryptic species in Polymorphus cf...
February 19, 2018: Parasitology
https://www.readbyqxmd.com/read/29454977/neural-pathways-in-emotional-approach-as-experiential-emotion-regulation-strategy
#7
M Vandekerckhove, W Van Hecke, M Quirin, J De Mey
Current research on emotion shows an increasing interest in the neuronal correlates of emotion regulation (ER). While previous research on ER has focused on gray matter correlates, this study represents the first exploratory study on white matter integrity and brain networks of ER. Responding to the gap between cognitive and affective approaches of ER, pertaining to some of the daily emotional stressors, the present study investigates a complementary experiential approach such as 'Emotional approach' or the tendency to affectively acknowledge, understand and express emotional experience (cf...
February 15, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29454878/a-comorbidity-of-cf-in-need-of-our-attention-and-activity-attention-deficit-hyperactivity-disorder
#8
EDITORIAL
Jurgen Lemiere, Trudy Havermans
No abstract text is available yet for this article.
February 14, 2018: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/29452850/evaluation-of-dot-blot-test-for-serological-diagnosis-of-bovine-brucellosis
#9
Carla Resende Bastos, Luis Antonio Mathias, Márcia Mariza Gomes Jusi, Renata Ferreira Dos Santos, Glaucenyra Cecília Pinheiro da Silva, Marcos Rogério André, Rosangela Zacarias Machado, Karina Paes Bürger
The objective of this study was to standardize and validate the dot-blot test for the serological diagnosis of bovine brucellosis, compare the results with those found in the 2-mercaptoethanol (2-ME) and complement fixation test (CF), and estimate the relative sensitivity and specificity of the dot-blot compared to these tests. Fifty bovine blood serum samples were used for the test standardization, and 1315 samples were used for evaluation and comparison between the tests; the results were compared using the Kappa indicator...
February 13, 2018: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/29451595/evaluation-of-molluscicidal-activity-of-three-mangrove-species-avicennia-schaueriana-laguncularia-racemosa-and-rhizophora-mangle-and-their-effects-on-the-bioactivity-of-biomphalaria-glabrata-say-1818
#10
Renato Juvino de Aragão Mendes, Adalberto Alves Pereira Filho, Aline de Jesus Lustosa Nogueira, Karla Regina Freitas Araújo, Clícia Rosane Costa França, Iramar Borba de Carvalho, Natale Maria Lindoso da Silva, Alexandre Santana Azevedo, Ivone Garros Rosa
Schistosomiasis is a disease of global extent reaching populations in social vulnerability. One of the control measures of this parasitosis is the use of molluscicidal substances that can fight snails of the genus Biomphalaria, intermediate hosts of Schistosoma mansoni. The aim of this work was to study the toxic activity of three mangrove species (Avicennia schaueriana Stapf. & Leech, ex Moldenke, 1939, Laguncularia racemosa (L.) CF Gaertn, 1807 and Rhizophora mangle L. 1753) on the biological activities of snails Biomphalaria glabrata...
2018: Revista do Instituto de Medicina Tropical de São Paulo
https://www.readbyqxmd.com/read/29451417/coumestrol-confers-partial-resistance-in-soybean-plants-against-cercospora-leaf-blight
#11
Eduardo Chagas Silva, Pramuditha L Abhayawardhana, Anatoliy V Lygin, Clark L Robertson, Mei Liu, Zhijun Liu, Raymond W Schneider
Although previous research showed that the purple symptom of Cercospora leaf blight (CLB) is associated with lower biomass of Cercospora cf. flagellaris and lower concentrations of cercosporin, a reactive oxygen species producer, as compared to blighted leaves, the hypothesis that the purple symptom is a plant reaction to the pathogen has never been tested. In this study, we demonstrated that high levels of coumestrol (COU) were associated with purple symptoms of CLB and that COU has strong antioxidant activity...
February 16, 2018: Phytopathology
https://www.readbyqxmd.com/read/29450112/effect-of-bacillus-pumilus-ccibp-c5-on-musa-pseudocercospora-fijiensis-interaction
#12
Mileidy Cruz-Martín, Mayra Acosta-Suárez, Eilyn Mena, Berkis Roque, Tatiana Pichardo, Yelenys Alvarado-Capó
The effect of antifungal activity of culture filtrate (CF) of Bacillus pumilus strain CCIBP-C5, an isolate from a phyllosphere of banana ( Musa ) leaves, was determined on Pseudocercospora fijiensis challenged banana plants. The CF was shown to decrease the fungal biomass and induce changes in banana plant. In this sense, at 70 days post inoculation (dpi), a lower infection index as well as a decrease in fungal biomass after 6 dpi was obtained in treated plants with respect to control ones. At the same time, changes in the activities of several enzymes related to plant defense responses, such as phenylalanine ammonia lyase, chitinases, β-1,3-glucanases and peroxidases were observed...
February 2018: 3 Biotech
https://www.readbyqxmd.com/read/29449831/-aspergillus-terreus-inhibits-growth-and-induces-morphological-abnormalities-in-pythium-aphanidermatum-and-suppresses-pythium-induced-damping-off-of-cucumber
#13
Boshra A Halo, Rashid A Al-Yahyai, Abdullah M Al-Sadi
The study investigated the efficacy of two isolates of Aspergillus terreus (65P and 9F) on the growth, morphology and pathogenicity of Pythium aphanidermatum on cucumber. In vitro tests showed that the two isolates inhibited the growth of P. aphanidermatum in culture. Investigating P. aphanidermatum hyphae close to the inhibition zone showed that the hyphae showed abnormal growth and loss of internal content. Treating P. aphanidermatum with the culture filtrate (CF) of A. terreus resulted in significant rise in cellular leakage of P...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29449653/cftr-mutation-enhances-dishevelled-degradation-and-results-in-impairment-of-wnt-dependent-hematopoiesis
#14
Huaqin Sun, Yan Wang, Jieting Zhang, Yan Chen, Yanyan Liu, Ziyuan Lin, Mingfeng Liu, Kai Sheng, Huijuan Liao, Kam Sze Tsang, Xiaohu Zhang, Xiaohua Jiang, Wenming Xu, Meng Mao, Hsiao Chang Chan
Mutations of cystic fibrosis transmembrane conductance regulator (CFTR) cause cystic fibrosis (CF) with a multitude of clinical manifestations. Some CF patients develop clinically significant anemia, suggesting that CFTR may regulate hematopoiesis. Here, we report that cftr mutant zebrafish model exhibits primitive and definitive hematopoietic defects with impaired Wnt signaling. Cftr is found to interact, via its PDZ-binding domain (PDZBD), with Dishevelled (Dvl), a key component of Wnt signaling required for hematopoietic progenitor specification, thus protecting Dvl from Dapper1 (Dpr1)-induced lysosomal degradation...
February 15, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29449440/lung-clearance-index-to-monitor-treatment-response-in-pulmonary-exacerbations-in-preschool-children-with-cystic-fibrosis
#15
Jonathan H Rayment, Sanja Stanojevic, Stephanie D Davis, George Retsch-Bogart, Felix Ratjen
BACKGROUND: Antibiotic treatment for pulmonary symptoms in preschool children with cystic fibrosis (CF) varies among clinicians. The lung clearance index (LCI) is sensitive to early CF lung disease, but its utility to monitor pulmonary exacerbations in young children has not been assessed. OBJECTIVE: We aim to (1) understand how LCI changes during lower respiratory tract symptoms relative to a recent clinically stable measurement, (2) determine whether LCI can identify antibiotic treatment response and (3) compare LCI changes to changes in spirometric indices...
February 15, 2018: Thorax
https://www.readbyqxmd.com/read/29448031/phylogeography-and-population-genetic-analyses-reveal-the-speciation-of-the-tuber-indicum-complex
#16
Peng Qiao, Wei Tian, Peigui Liu, Fuqiang Yu, Juan Chen, Xiaojuan Deng, Shanping Wan, Ran Wang, Yun Wang, Hongen Guo
Tuber indicum is an ectomycorrhizal ascomycete that produces edible ascocarps. Based on a number of specimens with known exact origin, we investigate the speciation of the Tuber indicum complex in southwest China. Internal transcribed spacer (ITS) and simple sequence repeat (SSR) markers were used in the study. Phylogeography and population genetics analyses were combined to detect 31 wild populations of the T. indicum complex. Two distinct lineages, Tuber cf. indicum and Tuber cf. himalayense, were identified in the T...
February 12, 2018: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/29447949/protective-effects-of-alpinae-oxyphyllae-fructus-extracts-on-lipopolysaccharide-induced-animal-model-of-alzheimer-s-disease
#17
Yunlong Wang, Mengshi Wang, Kaiyue Fan, Tongde Li, Tingxu Yan, Bo Wu, Kaishun Bi, Ying Jia
ETHNOPHARMACOLOGICAL RELEVANCE: Alpinae Oxyphyllae Fructus (AOF) with warming and tonifying the kidney and spleen, anti-salivation, anti-polyuria and anti-diarrhea functions is the dried ripe fruits of Alpinia oxyphylla Miq. (Zingiberaceae). As a traditional Chinese medicine, its application history is very long. AIMS OF THE STUDY: The purpose of our study is to investigate the effects of different solvent extracts from AOF on lipopolysaccharide (LPS)-induced animal model of Alzheimer's disease (AD) to elucidate the traditional medical theories with modern pharmacological methods and provide a reference for further clarifying its active components and mechanisms...
February 12, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29446953/visible-light-induced-external-radical-triggered-annulation-to-access-cf-2-containing-benzoxepine-derivatives
#18
Haoyue Xiang, Qing-Lan Zhao, Peng-Ju Xia, Jun-An Xiao, Zhi-Peng Ye, Xiong Xie, Huan Sheng, Xiao-Qing Chen, Hua Yang
A facile and diversified synthesis of functionalized CF 2 -containing benzoxepine derivatives via photoredox catalysis was achieved in this work. This novel protocol features broad substrate scope, mild reaction conditions, operational simplicity, easy scale-up, and versatile derivatization, which would facilitate its practical and broad applications in the construction of valuable and synthetically challenging heterocycles.
February 15, 2018: Organic Letters
https://www.readbyqxmd.com/read/29446943/fe-2-o-3-promoted-intermolecular-chlorotrifluoromethylthiolation-of-alkenes
#19
Yimin Jia, Hongmei Qin, Na Wang, Zhong-Xing Jiang, Zhigang Yang
A simple, convenient method for intermolecular chlorotrifluoromethylthiolation of alkenes by using a low-cost and more abundant iron catalyst has been developed. This protocol provides a straightforward way to synthesize a variety of useful SCF 3 -containing chlorides from a wide range of alkenes, including electron-deficient, aromatic, and unactivated alkenes. Mechanistic studies indicate that this is a free radical transformation, and the stronger electrophilic trifluoromethylthiolating reagent CF 3 SCl was generated in situ under the employed conditions...
February 15, 2018: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29446261/enhanced-linear-array-photoacoustic-beamforming-using-modified-coherence-factor
#20
Moein Mozaffarzadeh, Yan Yan, Mohammad Mehrmohammadi, Bahador Makkiabadi
Photoacoustic imaging (PAI) is a promising medical imaging modality providing the spatial resolution of ultrasound imaging and the contrast of optical imaging. For linear-array PAI, a beamformer can be used as the reconstruction algorithm. Delay-and-sum (DAS) is the most prevalent beamforming algorithm in PAI. However, using DAS beamformer leads to low-resolution images as well as high sidelobes due to nondesired contribution of off-axis signals. Coherence factor (CF) is a weighting method in which each pixel of the reconstructed image is weighted, based on the spatial spectrum of the aperture, to mainly improve the contrast...
February 2018: Journal of Biomedical Optics
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