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https://www.readbyqxmd.com/read/29342315/oxidation-of-methylalumoxane-oligomers
#1
Harmen Zijlstra, Scott Collins, Jason Scott McIndoe
The anions formed from methylalumoxane (MAO) and suitable donors (e.g. octamethyltrisiloxane) are amenable to mass spectrometric (MS) analysis. Their composition as deduced from this data allows direct insight into the chemical transformations of their neutral precursors. One such process is oxidation, which is well-known to be facile for MAO without any clear idea of what actually occurs at a molecular level. Addition of O2 to MAO results in immediate gelation, but MS analysis reveals no corresponding change to the composition of the principal oligomeric anions...
January 17, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29341815/development-and-validation-of-simulated-virtual-patients-to-impart-early-clinical-exposure-in-endocrine-physiology
#2
Akriti Gupta, Satendra Singh, Farah Khaliq, Upreet Dhaliwal, S V Madhu
In the country presently, preclinical medical students are not routinely exposed to real patients. Thus, when they start clinical postings, they are found to have poor clinical reasoning skills. Simulated virtual patients (SVPs) can improve clinical skills without endangering real patients. This pilot study describes the development of two SVPs in endocrine physiology and their validation in terms of acquisition of clinical knowledge and student engagement. Two SVPs, Nandini Sharma (unintentional weight gain) and Sunil Yadav (polyuria), were created and published on the i-Human Patients platform through an iterative, interdisciplinary, and transdisciplinary collaborative process using the conceptual framework of Kim et al...
March 1, 2018: Advances in Physiology Education
https://www.readbyqxmd.com/read/29340725/decision-making-in-management-of-the-complex-trauma-patient-changing-the-mindset-of-the-non-trauma-surgeon
#3
Linda Sonesson, Kenneth Boffard, Lars Lundberg, Martin Rydmark, Klas Karlgren
BACKGROUND: European surgeons are frequently subspecialized and trained primarily in elective surgical techniques. As trauma leaders, they may occasionally have to deal with complex polytrauma, advanced management techniques, differing priorities, and the need for multidisciplinary care. There is a lack of expertise, experience, and a low trauma volume, as well as a lack of research, with limited support as to the decision-making and teaching challenges present. We studied what experienced trauma experts describe as the challenges that are specific to the advanced surgical decision-making required, whether civilian, humanitarian, or military...
January 16, 2018: World Journal of Surgery
https://www.readbyqxmd.com/read/29340221/recombinant-antibodies-to-the-ebola-virus-glycoprotein
#4
A A Panina, I G Dementieva, T K Aliev, V A Toporova, D S Balabashin, M N Bokov, L P Pozdnyakova, O B Shchemchukova, D A Dolgikh, P G Sveshnikov, M P Kirpichnikov
Currently, there are no approved therapies for targeted prevention and treatment of Ebola hemorrhagic fever. In the present work, we describe the development of a eukaryotic expression system for the production of three full-length chimeric antibodies (IgG1-kappa isotypes) GPE118, GPE325, and GPE534 to the recombinant glycoprotein of the Ebola virus (EBOV GP), which is a key factor in the pathogenicity of the disease. The immunochemical properties of the obtained antibodies were studied by immunoblotting and indirect, direct, and competitive ELISA using the recombinant EBOV proteins rGPdTM, NP, and VP40...
October 2017: Acta Naturae
https://www.readbyqxmd.com/read/29339225/metabolism-and-pharmacokinetics-of-a-potent-n-acylindole-antagonist-of-the-oxe-receptor-for-the-eosinophil-chemoattractant-5-oxo-6-8-11-14-eicosatetraenoic-acid-5-oxo-ete-in-rats-and-monkeys
#5
Chintam Nagendra Reddy, Hussam Alhamza, Shishir Chourey, Qiuji Ye, Vivek Gore, Chantal Cossette, Sylvie Gravel, Irina Slobodchikova, Dajana Vuckovic, Joshua Rokach, William S Powell
We previously identified the indole 264 as a potent in vitro antagonist of the human OXE receptor that mediates the actions of the powerful eosinophil chemoattractant 5-oxo-ETE. No antagonists of this receptor are currently commercially available or are being tested in clinical studies. The lack of a rodent ortholog of the OXE receptor has hampered progress in this area because of the unavailability of commonly used mouse or rat animal models. In the present study, we examined the feasibility of using the cynomolgus monkey as an animal model to investigate the efficacy of orally administered 264 in future in vivo studies...
January 12, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29338674/would-you-be-willing-to-zap-your-child-s-brain-public-perspectives-on-parental-responsibilities-and-the-ethics-of-enhancing-children-with-transcranial-direct-current-stimulation
#6
Katy Wagner, Hannah Maslen, Justin Oakley, Julian Savulescu
BACKGROUND: Transcranial direct current stimulation (tDCS) is an experimental brain stimulation technology that may one day be used to enhance the cognitive capacities of children. Discussion about the ethical issues that this would raise has rarely moved beyond expert circles. However, the opinions of the wider public can lead to more democratic policy decisions and broaden academic discussion of this issue. METHODS: We performed a quantitative survey of members of the US public...
January 17, 2018: AJOB Empirical Bioethics
https://www.readbyqxmd.com/read/29338653/a-new-alchemical-poem-attributed-to-kh%C3%A4-lid-b-yaz%C3%A4-d-d-ca-705
#7
George Saliba
This paper deals primarily with the identification of an inaccurately catalogued alchemical poem attributed to the famous Umayyad prince Khālid b. Yazīd (d. 705), edited, translated, and commented upon here for the first time. The paper also addresses the authenticity of Khālid's interest in alchemy and connects that interest to the need of the early Islamic empire to develop its own gold coinage as a sign of political independence from Byzantine coinage that was up till then the currency of the lands occupied by early Muslims in the regions of modern-day Egypt and Syria...
August 2017: Ambix
https://www.readbyqxmd.com/read/29337901/transcriptional-readthrough-rnas-reflect-the-phenomenon-of-a-gene-contains-gene-s-or-gene-s-within-a-gene-in-the-human-genome-and-thus-are-not-chimeric-rnas
#8
REVIEW
Yan He, Chengfu Yuan, Lichan Chen, Mingjuan Lei, Lucas Zellmer, Hai Huang, Dezhong Joshua Liao
Tens of thousands of chimeric RNAs, i.e., RNAs with sequences of two genes, have been identified in human cells. Most of them are formed by two neighboring genes on the same chromosome and are considered to be derived via transcriptional readthrough, but a true readthrough event still awaits more evidence and trans-splicing that joins two transcripts together remains as a possible mechanism. We regard those genomic loci that are transcriptionally read through as unannotated genes, because their transcriptional and posttranscriptional regulations are the same as those of already-annotated genes, including fusion genes formed due to genetic alterations...
January 16, 2018: Genes
https://www.readbyqxmd.com/read/29337208/quantum-mechanics-predicts-evolutionary-biology
#9
REVIEW
J S Torday
Nowhere are the shortcomings of conventional descriptive biology more evident than in the literature on Quantum Biology. In the on-going effort to apply Quantum Mechanics to evolutionary biology, merging Quantum Mechanics with the fundamentals of evolution as the First Principles of Physiology-namely negentropy, chemiosmosis and homeostasis-offers an authentic opportunity to understand how and why physics constitutes the basic principles of biology. Negentropy and chemiosmosis confer determinism on the unicell, whereas homeostasis constitutes Free Will because it offers a probabilistic range of physiologic set points...
January 11, 2018: Progress in Biophysics and Molecular Biology
https://www.readbyqxmd.com/read/29336695/-ghosts-from-the-past-the-re-emergence-of-internalised-religious-stigma-following-diagnosis-of-hiv-among-northern-irish-gay-men
#10
Keith Kerrigan, Gill Green
This paper explores how previous exposure to religious homo-negativity features in the sense making process following HIV diagnosis in a homogenous sample of six gay men living in Northern Ireland. Interpretive Phenomenological Analysis was used to identify two key overarching themes: 'Negotiating authenticity in unsafe space' which relates to the experience of negotiating same sex attraction within religious environments and 'Re-emergence of religious shame in diagnosis' which relates to the way in which the men made sense of diagnosis from the position of having been exposed to religious homo-negativity earlier in their lives...
January 16, 2018: Journal of Homosexuality
https://www.readbyqxmd.com/read/29333150/evaluation-of-the-correlation-coefficient-of-polyethylene-glycol-treated-and-direct-prolactin-results-and-comparability-with-different-assay-system-results
#11
Shyamali Pal
The presence of Macro prolactin is a significant cause of elevated prolactin resulting in misdiagnosis in all automated systems. Poly ethylene glycol (PEG) pretreatment is the preventive process but such process includes the probability of loss of a fraction of bioactive prolactin. Surprisingly, PEG treated EQAS & IQAS samples in Cobas e 411 are found out to be correlating with direct results of at least 3 immunoassay systems and treated and untreated Cobas e 411 results are comparable by a correlation coefficient...
December 2017: EJIFCC
https://www.readbyqxmd.com/read/29333039/pharmacognostic-assesment-of-the-endemic-and-vulnerable-medicinal-climber-cayratia-pedata-lam-gagnep-var-glabra-gamble-and-its-antibacterial-activity
#12
S Sharmila, K Kalaichelvi, S M Dhivya, P Premamalini, P Abirami, G Jayanthi
Objective: The objective of this study is to evaluate a meticulous pharmacognostic cram is to supplement constructive information with regard to its identification, characterization, and standardization of endemic and endangered medicinal climber Cayratia pedata var. glabra and also screening the antibacterial activity of this climber. Materials and Methods: The morphological characters of study plant, microscopic examination of leaf powder, anatomy of young stem, physicochemical analysis of plant powder, extractive values, phytochemical analysis, powder with different chemical reagents, fluorescence analysis of plant powder, and other World Health Organization (WHO) recommended for standardization were analyzed...
December 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/29332835/varietal-discrimination-of-hop-pellets-by-near-and-mid-infrared-spectroscopy
#13
Julio C Machado, Miguel A Faria, Isabel M P L V O Ferreira, Ricardo N M J Páscoa, João A Lopes
Hop is one of the most important ingredients of beer production and several varieties are commercialized. Therefore, it is important to find an eco-real-time-friendly-low-cost technique to distinguish and discriminate hop varieties. This paper describes the development of a method based on vibrational spectroscopy techniques, namely near- and mid-infrared spectroscopy, for the discrimination of 33 commercial hop varieties. A total of 165 samples (five for each hop variety) were analysed by both techniques. Principal component analysis, hierarchical cluster analysis and partial least squares discrimination analysis were the chemometric tools used to discriminate positively the hop varieties...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29332804/effect-of-preprocessing-high-resolution-mass-spectra-on-the-pattern-recognition-of-cannabis-hemp-and-liquor
#14
Xinyi Wang, Peter de B Harrington, Steven F Baugh
High-resolution mass spectrometry (HRMS) combined with pattern recognition was used to discriminate among twenty-five Cannabis samples, twenty hemp samples, and eight liquor samples. The effects of preprocessing on multivariate data analysis were evaluated for Orbitrap high-resolution mass spectra. Different root transformations were evaluated with respect to the bin width and the average classification rates. In addition, linear binning and proportional binning with various resolving powers were studied with respect to the average classification rates...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29331967/understanding-frailty-a-qualitative-study-of-european-healthcare-policy-makers-approaches-to-frailty-screening-and-management
#15
Holly Gwyther, Rachel Shaw, Eva-Amparo Jaime Dauden, Barbara D'Avanzo, Donata Kurpas, Maria Bujnowska-Fedak, Tomasz Kujawa, Maura Marcucci, Antonio Cano, Carol Holland
OBJECTIVE: To elicit European healthcare policy-makers' views, understanding and attitudes about the implementation of frailty screening and management strategies and responses to stakeholders' views. DESIGN: Thematic analysis of semistructured qualitative interviews. SETTING: European healthcare policy departments. PARTICIPANTS: Seven European healthcare policy-makers representing the European Union (n=2), UK (n=2), Italy (n=1), Spain (n=1) and Poland (n=1)...
January 13, 2018: BMJ Open
https://www.readbyqxmd.com/read/29330752/evaluation-of-the-iron-regulatory-protein-1-interactome
#16
Gregory J Connell, Jando S Danial, Christian X Haastruthers
The interactions of iron regulatory proteins (IRPs) with mRNAs containing an iron-responsive element (IRE) is a major means through which intracellular iron homeostasis is maintained and integrated with cellular function. Although IRE-IRP interactions have been proposed to modulate the expression of a diverse number of mRNAs, a transcriptome analysis of the interactions that form within the native mRNA structure and cellular environment has not previously been described. An RNA-CLIP study is described here that identified IRP-1 interactions occurring within a primary cell line expressing physiologically relevant amounts of mRNA and protein...
January 12, 2018: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/29329876/discrimination-of-processing-grades-of-olive-oil-and-other-vegetable-oils-by-monochloropropanediol-esters-and-glycidyl-esters
#17
Jing Yan, Sergio B Oey, Stefan P J van Leeuwen, Saskia M van Ruth
In this study, the processing derived contaminants 2- and 3-monochloropropanediol (2- and 3-MCPD) esters and glycidyl esters (GEs) were analysed in 84 oil samples by GC-MS/MS for the discrimination of processing grades of olive oils as a potential authentication tool. Concentrations of 2- and 3-MCPD esters and GEs varied in the ranges 0-6 mg/kg, 0-1.5 mg/kg, and 0-1 mg/kg oil, respectively. The concentrations of the three compounds in lower grade olive oils were significantly higher (P < .001) than that in EVOO...
May 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29329870/16-o-methylcafestol-is-present-in-ground-roast-arabica-coffees-implications-for-authenticity-testing
#18
Yvonne Gunning, Marianne Defernez, Andrew D Watson, Niles Beadman, Ian J Colquhoun, Gwénaëlle Le Gall, Mark Philo, Hollie Garwood, David Williamson, Aaron P Davis, E Kate Kemsley
High-field and low-field proton NMR spectroscopy were used to analyse lipophilic extracts from ground roast coffees. Using a sample preparation method that produced concentrated extracts, a small marker peak at 3.16 ppm was observed in 30 Arabica coffees of assured origin. This signal has previously been believed absent from Arabicas, and has been used as a marker for detecting adulteration with robusta. Via 2D 600 MHz NMR and LC-MS, 16-O-methylcafestol and 16-O-methylkahweol were detected for the first time in Arabica roast coffee and shown to be responsible for the marker peak...
May 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29329857/meat-species-identification-using-dna-luminol-interaction-and-their-slow-diffusion-onto-the-biochip-surface
#19
Nura Fazira Noor Azam, Sharmili Roy, Syazana Abdullah Lim, Minhaz Uddin Ahmed
Recently, there has been a growing concern of consumers on the authenticity of food ingredients including adulteration with porcine and/or its derivatives. Therefore, this work reports on the development of a novel, simple, sensitive and rapid luminol-based electrochemiluminescence (ECL) technique for Sus scrofa (Porcine) DNA detection. Porcine DNA was firstly amplified using loop-mediated isothermal amplification (LAMP) method and subsequently added to luminol solution for further ECL analysis for quantification...
May 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29327416/comparative-proteomics-studies-of-insect-cuticle-by-tandem-mass-spectrometry-application-of-a-novel-proteomics-approach-to-the-pea-aphid-cuticular-proteins
#20
Masson Victor, Arafah Karim, Voisin Sébastien, Bulet Philippe
The exoskeleton of arthropods, called cuticle, is a biological composite material consisting principally of N-acetylglucosamine polymer embedded in cuticular proteins (CPs). The CPs have been studied and characterized by mass spectrometry in several cuticular structures and in many arthropods. Such analyses were usually carried out by protein extraction using SDS detergent followed by electrophoresis, allowing detection and identification of a large number of CPs. To build a repertoire of cuticular structures from Bombyx mori, Apis mellifera and Anopheles gambiae we avoided the use of SDS and electrophoresis...
January 12, 2018: Proteomics
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