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https://www.readbyqxmd.com/read/28092825/non-invasive-techniques-for-revealing-the-palette-of-the-romantic-painter-francesco-hayez
#1
Laura Rampazzi, Valentina Brunello, Cristina Corti, Elena Lissoni
This paper describes the first systematic analysis of the palette of Francesco Hayez, one of the most outstanding artists of European Romanticism, whose painting technique has never been extensively investigated despite the plethora of artistic studies. He lived in a particular moment in the history of painting, as in the first half of the 19th century many synthetic pigments were available, also in tin tubes, but traditional materials were still used. Sixteen paintings on canvas and on panels, created between 1823 and 1868, were analyzed in situ through non-invasive techniques (infrared reflectography and infrared reflection spectroscopy)...
January 5, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28092820/pcr-screening-of-an-african-fermented-pearl-millet-porridge-metagenome-to-investigate-the-nutritional-potential-of-its-microbiota
#2
Fabien Saubade, Christèle Humblot, Youna M Hemery, Jean-Pierre Guyot
Cereals are staple foods in most African countries, and many African cereal-based foods are spontaneously fermented. The nutritional quality of cereal products can be enhanced through fermentation, and traditional cereal-based fermented foods (CBFFs) are possible sources of lactic acid bacteria (LAB) with useful nutritional properties. The nutritional properties of LAB vary depending on the species and even on the strain, and the microbial composition of traditional CBFFs varies from one traditional production unit (TPU) to another...
December 29, 2016: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28092766/effect-of-multi-walled-carbon-nanotubes-on-phytotoxicity-of-sediments-contaminated-by-phenanthrene-and-cadmium
#3
Biao Song, Guangming Zeng, Jilai Gong, Peng Zhang, Jiaqin Deng, Canhui Deng, Jin Yan, Piao Xu, Cui Lai, Chen Zhang, Min Cheng
To implement effective control and abatement programs for contaminants accumulating in sediments, strategies are needed for evaluating the quality of amended sediments. In this study, phytotoxicity of the sediments contaminated by cadmium and phenanthrene was evaluated after in situ remediation with multi-walled carbon nanotubes (MWCNTs) as adsorbents. Adsorption experiments and measurement of aqueous concentrations of the contaminants in overlying water were used to investigate the remediation effectiveness from physical and chemical aspects...
January 9, 2017: Chemosphere
https://www.readbyqxmd.com/read/28092689/three-dimensional-imaging-of-dislocation-dynamics-during-the-hydriding-phase-transformation
#4
A Ulvestad, M J Welland, W Cha, Y Liu, J W Kim, R Harder, E Maxey, J N Clark, M J Highland, H You, P Zapol, S O Hruszkewycz, G B Stephenson
Crystallographic imperfections significantly alter material properties and their response to external stimuli, including solute-induced phase transformations. Despite recent progress in imaging defects using electron and X-ray techniques, in situ three-dimensional imaging of defect dynamics remains challenging. Here, we use Bragg coherent diffractive imaging to image defects during the hydriding phase transformation of palladium nanocrystals. During constant-pressure experiments we observe that the phase transformation begins after dislocation nucleation close to the phase boundary in particles larger than 300 nm...
January 16, 2017: Nature Materials
https://www.readbyqxmd.com/read/28092671/pde4d-promotes-fak-mediated-cell-invasion-in-braf-mutated-melanoma
#5
J Delyon, A Servy, F Laugier, J André, N Ortonne, M Battistella, S Mourah, A Bensussan, C Lebbé, N Dumaz
The cyclic AMP (cAMP) signaling pathway is critical in melanocyte biology for regulating differentiation. It is downregulated by phosphodiesterase (PDE) enzymes, which degrade cAMP itself. In melanoma evidence suggests that inhibition of the cAMP pathway by PDE type 4 (PDE4) favors tumor progression. For example, in melanomas harboring RAS mutations, the overexpression of PDE4 is crucial for MAPK pathway activation and proliferation induced by oncogenic RAS. Here we showed that PDE4D is overexpressed in BRAF-mutated melanoma cell lines, constitutively disrupting the cAMP pathway activation...
January 16, 2017: Oncogene
https://www.readbyqxmd.com/read/28092459/toward-high-throughput-and-multiplexed-imaging-of-genome-organization
#6
Eric F Joyce
Dr. Eric Joyce from the Department of Genetics at the University of Pennsylvania was awarded The President's Innovation award at the annual Society of Biomolecular Imaging and Informatics meeting held in Boston, September 2016. Chromosome interactions are a fundamental aspect of nuclear organization that can activate and silence genes or even direct chromosome rearrangements. However, the molecular mechanisms underlying how chromosomal segments find each other and form stable interactions within cells remain unknown...
January 2017: Assay and Drug Development Technologies
https://www.readbyqxmd.com/read/28092440/molecular-interactions-between-graphene-and-biological-molecules
#7
Xingquan Zou, Shuai Wei, Joshua Jasensky, Minyu Xiao, Qiuming Wang, Charles L Brooks, Zhan Chen
Applications of graphene have extended into areas of nanobio-technology such as nanobio-medicine, nanobio-sensing, as well as nanoelectronics with biomolecules. These applications involve interactions between proteins, peptides, DNA, RNA etc. and graphene, therefore understanding such molecular interactions is essential. For example, many applications based on using graphene and peptides require peptides to interact with (e.g., noncovalently bind to) graphene at one end, while simultaneously exposing the other end to the surrounding medium (e...
January 16, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28092417/dense-semi-clathrates-at-high-pressure-a-study-of-the-water-tert-butylamine-system
#8
Rubén Granero-García, Andrzej Falenty, Francesca Paola Anna Fabbiani
In situ high-pressure crystallization and diffraction techniques have been applied to obtain two very structurally-distinct semi-clathrates of the tert-butylamine-water system with hydration numbers 5.65 and 5.8, respectively, thereby considerably reducing a notable hydration gap between the monohydrate and the 7¼-hydrate that results when crystallization space is explored by temperature alone. Both structures can be considered as an intriguing solid-state example of hydrophobic hydration in which the water network creates wide tert-butylamine-filled channels stabilized by cross-linking hydrogen bonds...
January 16, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28092159/probe-decomposition-of-methylammonium-lead-iodide-perovskite-in-n2-and-o2-by-in-situ-infrared-spectroscopy
#9
Xiaozhou Yu, Ying Qin, Qing Peng
Packaging methylammonium lead iodide perovskite (MAPbI3) based solar cells with a controlled gaseous atmosphere, such as N2 or dry air, is a promising solution for its application as outdoor photovoltaics. However, the effect of N2 and O2 on the decomposition chemistry and kinetics of MAPbI3 is not well understood yet. With in-situ Fourier transform infrared spectroscopy measurements, we show that the effective activation energy for the degradation of MAPbI3 in N2 is ~ 120 kJ/mol. The decomposition of MAPbI3 is greatly enhanced when MAPbI3 is exposed to O2...
January 16, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28091993/bacterial-community-structure-and-prevalence-of-pusillimonas-like-bacteria-in-aged-landfill-leachate
#10
Nikolaos Remmas, Charikleia Roukouni, Spyridon Ntougias
Although several works have been performed from an engineering point of view, a limited number of studies have focused on microbial communities involved in the humification of aged landfill leachates. In this work, cultivation techniques, next-generation sequencing, and phospholipid fatty acid analysis were adopted to decrypt the diversity and the ecophysiological properties of the dominant microbiota in aged landfill leachate. Based on Illumina sequencing, Betaproteobacteria, Bacteroidetes, Actinobacteria, and Alphaproteobacteria dominated the aged landfill leachate...
January 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28091885/assessing-the-impact-of-preload-on-pyrite-rich-sediment-and-groundwater-quality
#11
Ohene Karikari-Yeboah, Jonas Addai-Mensah
Pyrite-rich sediments would, invariably, undergo redox reactions which would lead to acidic aqueous environment containing solubilized toxic metal species. When such sediments are subjected to preload, a technique employed by geotechnical engineers to improve the load-bearing capacity of highly compressible formation, transient flow of pore water, accompanied by acidity transfer, would occur as a response. Despite the concomitant environmental and socio-economic significance, to date, there has been limited interdisciplinary research on the underpinning geotechnical engineering and geo-environmental science issues for pyrite-rich sediments under preload...
February 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28091775/developmental-and-sex-specific-differences-in-expression-of-neuropeptides-derived-from-allatotropin-gene-in-the-silkmoth-bombyx-mori
#12
Branislav Bednár, Ladislav Roller, Daniel Čižmár, Diana Mitrová, Dušan Žitňan
Allatotropin (AT) and related neuropeptides are widespread bioactive molecules that regulate development, food intake and muscle contractions in insects and other invertebrates. In moths, alternative splicing of the at gene generates three mRNA precursors encoding AT with different combinations of three structurally similar AT-like peptides (ATLI-III). We used in situ hybridization and immunohistochemistry to map the differential expression of these transcripts during the postembryonic development of Bombyx mori...
January 16, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28091769/bousquet-dual-mobility-socket-for-patient-under-fifty%C3%A2-years-old-more-than-twenty%C3%A2-year-follow-up-of-one-hundred-and-thirty-one-hips
#13
Remi Philippot, Thomas Neri, Bertrand Boyer, Brice Viard, Frederic Farizon
PURPOSE: The aim of this study was to analyze dual mobility cup survival rate on young patients under 50 years old at more than 20 years of follow up. METHODS: One hundred thirty seven hips with a first generation of dual mobility Bousquet cup (Serf) were included. The mean age at the time of the surgery was 41 years and the mean follow-up was 21.9 years. RESULTS: Twenty year follow-up cup survival rate was 77%. No dislocation occurred, 44 hips were revised (including 21 cup aseptic loosenings isolated, 15 Intra Prosthetic Dislocations), seven hips were lost to follow-up, 11 patients died, and 75 hips were still in situ...
January 16, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28091628/in-situ-x-ray-absorption-near-edge-structure-studies-and-charge-transfer-kinetics-of-na6-v10o28-electrodes
#14
Han-Yi Chen, Jochen Friedl, Chun-Jern Pan, Ali Haider, Rami Al-Oweini, Yan Ling Cheah, Ming-Hsien Lin, Ulrich Kortz, Bing-Joe Hwang, Madhavi Srinivasan, Ulrich Stimming
Polyoxometalates (POMs) have been reported as promising electrode materials for energy storage applications due to their ability to undergo fast redox reactions with multiple transferred electrons per polyanion. Here we employ a polyoxovanadate salt, Na6[V10O28], as an electrode material in a lithium-ion containing electrolyte and investigate the electron transfer properties of Na6[V10O28] on long and short timescales. Looking at equilibrated systems, in situ V K-edge X-ray absorption near edge structure (XANES) studies show that all 10 V(5+) ions in Na6[V10O28] can be reversibly reduced to V(4+) in a potential range of 4-1...
January 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28091408/novel-mutation-of-cleidocranial-dysplasia-related-frameshift-runt-related-transcription-factor-2-in-a-sporadic-chinese-case
#15
Xue-Yan Qin, Pei-Zeng Jia, Hua-Xiang Zhao, Wei-Ran Li, Feng Chen, Jiu-Xiang Lin
BACKGROUND: Cleidocranial dysplasia (CCD) is an autosomal dominant disease that affects the skeletal system. Common symptoms of CCD include hypoplasia or aplasia of the clavicles, delayed or even absent closure of the fontanels, midface hypoplasia, short stature, and delayed eruption of permanent and supernumerary teeth. Previous studies reported a connection between CCD and the haploinsufficiency of runt-related transcription factor 2 (RUNX2). Here, we report a sporadic Chinese case presenting typical symptoms of CCD...
2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28090785/thymic-cytoarchitecture-changes-in-mice-exposed-to-vanadium
#16
Martha Ustarroz-Cano, Isabel Garcia-Pelaez, Silvana Cervantes-Yepez, Nelly Lopez-Valdez, Teresa I Fortoul
The thymus is a vital immune system organ wherein selection of T-lymphocytes occurs in a process regulated by dendritic and epithelial thymic cells. Previously, we have reported that in a mouse model of vanadium inhalation, a decrease in CD11c dendritic cells was observed. In the present study, we report on a thymic cortex-medulla distribution distortion in these hosts due to apparent effects of the inhaled vanadium on cytokeratin-5 (K5(+)) epithelial cells in the same mouse model - after 1, 2, and 4 weeks of exposure - by immunohistochemistry...
January 16, 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28090775/reaction-of-push-pull-enaminoketones-and-in-situ-generated-ortho-quinone-methides-synthesis-of-3-acyl-4h-chromenes-and-2-acyl-1h-benzo-f-chromenes-as-precursors-for-hydroxybenzylated-heterocycles
#17
Anton Vladimirovich Lukashenko, Vitaly Aleksandrovich Osyanin, Dmitry Vladimirovich Osipov, Yuri N Klimochkin
A simple and efficient method for the synthesis of 4H-chromenes and 1H-benzo[f]chromenes containing trifluoroacetyl or aroyl group in pyran ring from o-quinone methide precursors and push-pull enaminoketones has been developed. The chromenes are presumably formed through an initial oxa-Diels-Alder reaction followed by an elimination of amine. Possibility of further transformations of given chromenes to o-hydroxybenzylated pyrazoles, isoxazoles and pyridines has been demonstrated.
January 16, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28090298/in-situ-expression-of-bcl-2-in-pulmonary-artery-endothelial-cells-associates-with-pulmonary-arterial-hypertension-relative-to-heart-failure-with-preserved-ejection-fraction
#18
Raymond L Benza, Gretchen Williams, Changgong Wu, Kelly J Shields, Amresh Raina, Srinivas Murali, Michael J Passineau
We have previously reported that pulmonary artery endothelial cells (PAECs) can be harvested from the tips of discarded Swan-Ganz catheters after right heart catheterization (RHC). In this study, we tested the hypothesis that the existence of an antiapoptotic phenotype in PAECs obtained during RHC is a distinctive feature of pulmonary arterial hypertension (PAH; World Health Organization group 1) and might be used to differentiate PAH from other etiologies of pulmonary hypertension. Specifically, we developed a flow cytometry-based measure of Bcl-2 activity, referred to as the normalized endothelial Bcl-2 index (NEBI)...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28090126/fourier-transform-infrared-absorption-spectroscopy-for-quantitative-analysis-of-gas-mixtures-at-low-temperatures-for-homeland-security-applications
#19
D C Meier, K D Benkstein, W S Hurst, P M Chu
Performance standard specifications for point chemical vapor detectors are established in ASTM E 2885-13 and ASTM E 2933-13. The performance evaluation of the detectors requires the accurate delivery of known concentrations of the chemical target to the system under test. Referee methods enable the analyte test concentration and associated uncertainties in the analyte test concentration to be validated by independent analysis, which is especially important for reactive analytes. This work extends the capability of a previously demonstrated method for using Fourier transform infrared (FT-IR) absorption spectroscopy for quantitatively evaluating the composition of vapor streams containing hazardous materials at Acute Exposure Guideline Levels (AEGL) to include test conditions colder than laboratory ambient temperatures...
May 2017: Journal of Testing and Evaluation
https://www.readbyqxmd.com/read/28090007/ductal-carcinoma-in-situ-detected-during-prospective-mr-imaging-screening-of-a-woman-with-a-brca2-mutation-the-first-case-report-in-japan
#20
Mitsuhiro Tozaki, Seigo Nakamura, Dai Kitagawa, Takuji Iwase, Rie Horii, Futoshi Akiyama, Masami Arai
The present case is the first report in Japan in which a breast cancer was discovered as a result of prospective magnetic resonance imaging (MRI) screening study for BRCA1/2 mutation carriers who were free of breast or ovarian cancer. This case is significant and it verifies the importance of MRI screening in breast or ovarian cancer-free BRCA1/2 mutation carriers who do not exhibit positive mammographic or ultrasonographic findings.
January 13, 2017: Magnetic Resonance in Medical Sciences: MRMS
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