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https://www.readbyqxmd.com/read/28098264/assessment-of-coulometric-array-electrochemical-detection-coupled-with-hplc-uv-for-the-absolute-quantitation-of-pharmaceuticals
#1
Michael B Hicks, Leah Salituro, Ian Mangion, Wes Schafer, Rong Xiang, Xiaoyi Gong, Christopher J Welch
The use of a coulometric array detector in tandem with HPLC-UV was evaluated for the absolute quantitation of pharmaceutical compounds without standards, an important capability gap in contemporary pharmaceutical research and development. The high-efficiency LC flow-through electrochemical detector system allows for the rapid evaluation of up to 16 different potentials, aiding in the identification and quantitation of electrochemically reactive species. By quantifying the number of electrons added or removed from an analyte during its passage through the detector, the number of moles of the analyte can be established...
January 18, 2017: Analyst
https://www.readbyqxmd.com/read/28096596/hydatidiform-mole-with-uncontrolled-hyperthyroidism-an-anesthetic-challenge
#2
Nidhi Bhatia, Sanwar Mal Mitharwal
No abstract text is available yet for this article.
October 2016: Journal of Anaesthesiology, Clinical Pharmacology
https://www.readbyqxmd.com/read/28096421/rfamide-related-peptide-3-rfrp-3-suppresses-sexual-maturation-in-a-eusocial-mammal
#3
Diana E Peragine, Martha Pokarowski, Lucia Mendoza-Viveros, Ashlyn Swift-Gallant, Hai-Ying M Cheng, George E Bentley, Melissa M Holmes
Neuroendocrine mechanisms underlying social inhibition of puberty are not well understood. Here, we use a model exhibiting the most profound case of pubertal suppression among mammals to explore a role for RFamide-related peptide-3 [RFRP-3; mammalian ortholog to gonadotropin-inhibitory hormone (GnIH)] in neuroendocrine control of reproductive development. Naked mole rats (NMRs) live in sizable colonies where breeding is monopolized by two to four dominant animals, and no other members exhibit signs of puberty throughout their lives unless they are removed from the colony...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28095445/cytosolic-rna-dna-duplexes-generated-by-endogenous-reverse-transcriptase-activity-as-autonomous-inducers-of-skin-inflammation-in-psoriasis
#4
Jean-Pierre Molès, Anthony Griez, Jean-Jacques Guilhou, Céline Girard, Nicolas Nagot, Philippe Van de Perre, Pierre Dujols
Psoriasis is a chronic skin disease of unknown ætiology. Recent studies suggested that a large amount of cytosolic DNA (cyDNA) in keratinocytes is breaking keratinocytes DNA tolerance and promotes self-sustained inflammation in the psoriatic lesion. We investigated the origin of this cyDNA. We show that, amongst all the possible DNA structures, the cyDNA could be present as RNA:DNA duplexes in keratinocytes. We further show that endogenous reverse transcriptase activities generate such duplexes and consequently activate the production of Th1-inflammatory cytokines...
2017: PloS One
https://www.readbyqxmd.com/read/28095280/relative-importance-of-traditional-risk-factors-for-malignant-melanoma-in-the-czech-population
#5
Lucie Rajská, Dana Göpfertová, Jana Hercogová, Anna Jiráková, Zuzana Sečníková, Filip Rob, Zdeněk Šmerhovský
AIM: The Czech Republic is one of the leading European countries in incident cases of malignant melanoma (MM), which is on the rise. The study objective was to assess the strength of associations between MM and the known generally accepted risk factors for MM in the population of the Czech Republic. METHODS: The study was designed as a case-control study where cases were incident cases of MM detected at the Department of Dermatology and Venereology of the Bulovka Hospital...
December 2016: Central European Journal of Public Health
https://www.readbyqxmd.com/read/28095118/modeling-and-optimization-of-lime-based-stabilization-in-high-alkaline-arsenic-bearing-sludges-with-a-central-composite-design
#6
Jie Lei, Bing Peng, Xiaobo Min, Yanjie Liang, Yang You, Liyuan Chai
This study focuses on the modeling and optimization of lime-based stabilization in high alkaline arsenic-bearing sludges (HAABS) and describes the relationship between the arsenic leachate concentration (ALC) and stabilization parameters to develop a prediction model for obtaining the optimal process parameters and conditions. A central composite design (CCD) along with response surface methodology (RSM) was conducted to model and investigate the stabilization process with three independent variables: the Ca/As mole ratio, reaction time and liquid/solid ratio, along with their interactions...
January 17, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28094375/crystallization-kinetics-of-cerium-oxide-nanoparticles-formed-by-spontaneous-room-temperature-hydrolysis-of-cerium-iv-ammonium-nitrate-in-light-and-heavy-water
#7
Natasha W Pettinger, Robert E A Williams, Jinquan Chen, Bern Kohler
A stable sol of cerium oxide nanoparticles forms spontaneously when cerium(iv) ammonium nitrate (CAN) is dissolved in room-temperature water at mM concentrations. Electron microscopy experiments reveal the formation of highly crystalline cerium oxide particles several nm in diameter and suggest that they are formed from amorphous particles that are similar in size. Under the low pH conditions of the experiments, the nanoparticles form a stable dispersion and show no evidence of aggregation, even many months after synthesis...
January 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28093002/predictive-value-of-some-hematological-parameters-for-non-invasive-and-invasive-mole-pregnancies
#8
Cigdem Yayla Abıde, Enis Ozkaya, İlter Yenidede, Ahmet Eser, Evrim Bostancı Ergen, Ahter Tanay Tayyar, Mehmet Baki Senturk, Ates Karateke
AIM: The aim of this study was to discriminate mole pregnancies and invasive forms among cases with first trimester vaginal bleeding by the utilization of some complete blood count parameters conjunct to sonographic findings and beta human chorionic gonadotropin concentration. MATERIALS AND METHODS: Consecutive 257 cases with histopathologically confirmed mole pregnancies and 199 women without mole pregnancy presented with first trimester vaginal bleeding who admitted to Zeynep Kamil Women and Children's Health Training Hospital between january 2012 to january 2016 were included in this cross sectional study...
January 17, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28092816/encapsulation-of-cisplatin-in-a-pegylated-calcium-phosphate-nanoparticle-cpnp-for-enhanced-cytotoxicity-to-cancerous-cells
#9
Yang Ding, Kang Zhai, Pei Pei, Yue Lin, Yinchu Ma, Huixia Zhu, Mingfeng Shao, Xianzhu Yang, Wei Tao
HYPOTHESIS: Exchange of the chloride ion (Cl(-)) ligands of cisplatin with carboxylates is widely used in fabricating cisplatin loaded nanoparticles for improved cancer therapy. However, the dynamic exchange may cause premature cisplatin release and even disintegration of the nanoparticles in Cl(-)-containing medium such as in plasma. Molecules bearing carboxylates are capable of mediating the mineralization process of calcium phosphate; therefore, it is possible to overcome the disadvantage by sequestering cisplatin in a calcium phosphate nanoparticle (CPNP)...
January 11, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28089082/backcasting-to-identify-food-waste-prevention-and-mitigation-opportunities-for-infant-feeding-in-maternity-services
#10
Yvonne Ryan-Fogarty, Genevieve Becker, Richard Moles, Bernadette O'Regan
Food waste in hospitals is of major concern for two reasons: one, healthcare needs to move toward preventative and demand led models for sustainability and two, food system sustainability needs to seek preventative measures such as diet adaptation and waste prevention. The impact of breast-milk substitute use on health services are well established in literature in terms of healthcare implications, cost and resourcing, however as a food demand and waste management issue little has been published to date. This paper presents the use of a desk based backcasting method to analyse food waste prevention, mitigation and management options within the Irish Maternity Service...
January 6, 2017: Waste Management
https://www.readbyqxmd.com/read/28088562/the-effect-of-high-temperature-sol-gel-polymerization-parameters-on-the-microstructure-and-properties-of-hydrophobic-phenol-formaldehyde-silica-hybrid-aerogels
#11
Mohamad Mehdi Seraji, Ghasem Sameri, Jamal Davarpanah, Ahmad Reza Bahramian
Phenol-formaldehyde/silica hybrid aerogels with different degree of hydrophobicity were successfully synthesized via high temperature sol-gel polymerization. Tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) were used as precursor and co-precursor of the hydrophobic silica-based phase, respectively. The hydrolysis step of silica based sols were conducted by acid catalyzed reactions and HCl was used as hydrolysis catalyst. The chemical structure of prepared hybrid aerogels was characterized by Fourier Transform Infrared spectroscopy (FT-IR)...
January 6, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28079209/dynamic-phase-change-and-local-structures-in-il-containing-mixtures-classical-md-simulations-and-experiments
#12
Yang Wu, Xia Wang, Qiaozhen Liu, Xiaoxue Ma, Dawei Fang, Xuefei Jiang, Wei Guan
The dynamic phase change between a homogeneous mixture and a liquid-liquid biphase and separation of phases are explored in three-component mixtures composed of 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]), 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4]), and water through a classical simulation method and experiment. Different experimental and theoretical tools, including density measurement, dynamic light scattering study, radial distribution, mean square displacement, an interstice model, and statistical function, are used to describe the structural modifications of the ions as a function of solution concentration...
January 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28078874/tendonitis-of-the-rotator-cuff-treated-with-extracorporeal-shock-wave-therapy-radiographic-monitoring-to-identify-prognostic-factors-for-disintegration
#13
A Notarnicola, L Moretti, G Maccagnano, S Tafuri, B Moretti
Extracorporeal shock wave therapy (ESWT) is widely used for calcific tendonitis of the shoulder. The initial rationale for this therapy was to break the calcification, but this effect does not always occur. To date, we do not know how calcifications evolve or why they may be less responsive to the action of the shock waves. One hundred and seventy-four shoulders with calcific tendinitis were prospectively evaluated before and after ESWT, using the radiographic classifications according to Gartner and Heyer, to Bosworth and to Molè...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28072840/locomotor-activity-and-body-temperature-patterns-over-a-temperature-gradient-in-the-highveld-mole-rat-cryptomys-hottentotus-pretoriae
#14
Meghan Haupt, Nigel C Bennett, Maria K Oosthuizen
African mole-rats are strictly subterranean mammals that live in extensive burrow systems. High humidity levels in the burrows prevent mole-rats from thermoregulating using evaporative cooling. However, the relatively stable environment of the burrows promotes moderate temperatures and small daily temperature fluctuations. Mole-rats therefore display a relatively wide range of thermoregulation abilities. Some species cannot maintain their body temperatures at a constant level, whereas others employ behavioural thermoregulation...
2017: PloS One
https://www.readbyqxmd.com/read/28072530/the-effect-of-%C3%AE-cyclodextrin-on-the-multistate-species-distribution-of-3-methoxy-4-7-dihydroxyflavylium-discrimination-of-the-two-hemiketal-enantiomers
#15
Sandra Gago, Nuno Basílio, Alexandre Quintas, Fernando Pina
The effect of the β-cyclodextrin on the mole fraction distribution of the multistate species of the anthocyanins model compound, 3-methoxy-4',7-dihydroxyflavylium, was studied by NMR, stopped flow, circular dichroism and UV-Visible absorption spectroscopy. The formation of inclusion complexes with hemiketal and trans-chalcone, possessing transition dipole moments in a parallel orientation to the cyclodextrin n-fold axis, was unequivocally proved by means of the positive induced circular dichroism signal. The discrimination of the two hemiketal enantiomers was achieved by the splitting of 1H NMR peaks in the presence β-cyclodextrin...
January 10, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28060141/pd-l1-expression-in-premalignant-and-malignant-trophoblasts-from-gestational-trophoblastic-diseases-is-ubiquitous-and-independent-of-clinical-outcomes
#16
Pierre-Adrien Bolze, Sophie Patrier, Jérôme Massardier, Touria Hajri, Fatima Abbas, Anne Marie Schott, Fabienne Allias, Mojgan Devouassoux-Shisheboran, Gilles Freyer, François Golfier, Benoît You
OBJECTIVE: Recently reported expression of programmed cell death 1 ligand 1 (PD-L1) in gestational trophoblastic diseases (GTDs) suggests that the immune tolerance of pregnancy might be hijacked during neoplastic process. We assessed PD-L1 protein expression in premalignant and malignant GTD lesions and analyzed associations with disease severity and chemotherapy outcomes. METHODS: We included 83 GTD whole-tissue sections from 76 patients in different treatment settings...
January 4, 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/28060055/genetic-counselling-and-high-penetrance-susceptibility-gene-analysis-reveal-the-novel-cdkn2a-p-d84v-c-251a-t-mutation-in-melanoma-prone-families-from-italy
#17
Riccardo G Borroni, Ausilia M Manganoni, Sara Grassi, Maurizia Grasso, Marta Diegoli, Carmela Giorgianni, Valentina Favalli, Laura Pavoni, Maddalena Cespa, Eloisa Arbustini
Genetic susceptibility to primary cutaneous melanoma (PCM) may account for up to 12% of PCMs, presenting as the familial atypical mole/multiple melanoma syndrome (FAMMM), an autosomal dominant condition with incomplete penetrance and variable expressivity, characterized by PCM in at least two relatives and/or more than one PCMs in the same patient. To identify individuals at high genetic risk of PCM, from 1 January 2012 to 31 December 2015, we offered genetic counselling and molecular analysis of the two high-penetrance FAMMM susceptibility genes, cyclin-dependent kinase inhibitor 2A (CDKN2A) and cyclin-dependent kinase 4 (CDK4), to 92 consecutive, unrelated patients with FAMMM...
January 4, 2017: Melanoma Research
https://www.readbyqxmd.com/read/28058796/hox-gene-expression-in-the-specialized-limbs-of-the-iberian-mole-talpa-occidentalis
#18
Constanze Bickelmann, Wessel van der Vos, Merijn A G de Bakker, Rafael Jiménez, Saskia Maas, Marcelo R Sánchez-Villagra
Fossorial talpid moles use their limbs predominantly for digging, which explains their highly specialized anatomy. The humerus is particularly short and dorsoventrally rotated, with broadened distal and proximal parts where muscles attach and which facilitate powerful abductive movements. The radius and ulna are exceptionally robust and short. The ulna has an expanded olecranon process. The femur is generalized, but the fused tibia-fibula complex is short and robust. To understand the developmental bases of these specializations, we studied expression patterns of four 5' Hox genes in the fossorial Iberian mole (Talpa occidentalis)...
January 2017: Evolution & Development
https://www.readbyqxmd.com/read/28057915/preparation-and-electrochemical-performances-of-carbon-sphere-zno-core-shell-nanocomposites-for-supercapacitor-applications
#19
Xuechun Xiao, Bingqian Han, Gang Chen, Lihong Wang, Yude Wang
Carbon sphere (CS)@ZnO core-shell nanocomposites were successfully prepared through facile low-temperature water-bath method without annealing treatment. The morphology and the microstructure of samples were characterized by transition electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. ZnO nanoparticles with several nanometers in size decorated on the surface of the carbon sphere and formed a core-shell structure. Electrochemical performances of the CS@ZnO core-shell nanocomposites electrodes were investigated by cyclic voltammetry (CV) and galvanostatic charge/discharge (GDC)...
January 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28057914/heterophase-structured-nanocrystals-as-superior-supports-for-ru-based-catalysts-in-selective-hydrogenation-of-benzene
#20
Zhikun Peng, Xu Liu, Shuaihui Li, Zhongjun Li, Baojun Li, Zhongyi Liu, Shouchang Liu
ZrO2 heterophase structure nanocrystals (HSNCs) were synthesized with tunable ratios of monoclinic ZrO2 (m-ZrO2) to tetragonal ZrO2 (t-ZrO2). The phase mole ratio of m-ZrO2 versus t-ZrO2 in ZrO2 HSNCs was tuned from 40% to 100%. The concentration of the surface hydroxyl groups on m-ZrO2 is higher than that on t-ZrO2. ZrO2 HSNCs have different surface hydroxyl groups on two crystalline phases. This creates more intimate synergistic effects than their single-phase counterparts. The ZrO2 HSNCs were used as effective supports to fabricate heterophase-structured Ru/ZrO2 catalysts for benzene-selective hydrogenation...
January 6, 2017: Scientific Reports
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