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https://www.readbyqxmd.com/read/28731218/explosives-in-the-cage-metal-organic-frameworks-for-high-energy-materials-sensing-and-desensitization
#1
REVIEW
Shan Wang, Qianyou Wang, Xiao Feng, Bo Wang, Li Yang
An overview of the current status of coordination polymers and metal-organic frameworks (MOFs) pertaining to the field of energetic materials is provided. The explosive applications of MOFs are discussed from two aspects: one for detection of explosives, and the other for explosive desensitization. By virtue of their adjustable pore/cage sizes, high surface area, tunable functional sites, and rich host-guest chemistry, MOFs have emerged as promising candidates for both explosive sensing and desensitization...
July 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28730833/short-term-administration-of-melatonin-or-ghrelin-on-diabetic-rats-effects-on-angiotensin-ii-and-vasopressin-induced-uterine-contractility
#2
D Sugár, R Agócs, E Tatár, G Tóth, P Horváth, E Sulyok, A J Szabó
The glycosaminoglycan (GAG) molecules are a group of high molecular weight, negatively charged polysaccharides present abundantly in the mammalian organism. By their virtue of ion and water binding capacity, they may affect the redistribution of body fluids and ultimately the blood pressure. Data from the literature suggests that the mitogens Vascular Endothelial Growth Factor (VEGF)-A and VEGF-C are able to regulate the amount and charge density of GAGs and their detachment from the cell surface. Based on these findings we investigated the relationship between the level of dietary sodium intake, the expression levels of VEGF-A and VEGF-C, and the amount of the skin GAGs hyaluronic acid and chondroitin sulphate in an in vivo rat model...
July 18, 2017: Physiological Research
https://www.readbyqxmd.com/read/28726373/ultrasensitive-homogeneous-electrochemical-detection-of-transcription-factor-by-coupled-isothermal-cleavage-reaction-and-cycling-amplification-based-on-exonuclease-iii
#3
Lihua Lu, Huijuan Su, Feng Li
The assay and monitoring of transcription factors (TFs) has attracted extensive attention, due to their important roles in regulation of gene expressions. Herein, a simple, low cost, rapid, and highly sensitive homogeneous electrochemical method utilizing the coupled isothermal cleavage reaction and cycling amplification based on exonuclease III (Exo III) was explored for the analysis of transcription factor NF-κB p50 in aqueous solution. In the assay, a 3-methylene blue (MB)-labeled hairpin probe is designed, which can be opened up by the single stranded DNA (ssDNA) protected by NF-κB p50 from the Exo III cleavage, to trigger the subsequent Exo III-assisted digestion, thus a large amount of MB-labeled mononucleotides are liberated to result in the greatly amplified electrochemical signal...
July 20, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28725197/skeletal-muscle-remodeling-in-response-to-eccentric-vs-concentric-loading-morphological-molecular-and-metabolic-adaptations
#4
REVIEW
Martino V Franchi, Neil D Reeves, Marco V Narici
Skeletal muscle contracts either by shortening or lengthening (concentrically or eccentrically, respectively); however, the two contractions substantially differ from one another in terms of mechanisms of force generation, maximum force production and energy cost. It is generally known that eccentric actions generate greater force than isometric and concentric contractions and at a lower metabolic cost. Hence, by virtue of the greater mechanical loading involved in active lengthening, eccentric resistance training (ECC RT) is assumed to produce greater hypertrophy than concentric resistance training (CON RT)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28724960/sgrna-expression-of-cripsr-cas9-system-based-on-mirna-polycistrons-as-a-versatile-tool-to-manipulate-multiple-and-tissue-specific-genome-editing
#5
Chen Xie, Yan-Lian Chen, Dong-Fang Wang, Yi-Lin Wang, Tian-Peng Zhang, Hui Li, Fu Liang, Yong Zhao, Guang-Ya Zhang
CRISPR/Cas9-mediated genome editing is a next-generation strategy for genetic modifications. Typically, sgRNA is constitutively expressed relying on RNA polymerase III promoters. Polymerase II promoters initiate transcription in a flexible manner, but sgRNAs generated by RNA polymerase II promoter lost their nuclease activity. To express sgRNAs in a tissue-specific fashion and endow CRISPR with more versatile function, a novel system was established in a polycistron, where miRNAs (or shRNAs) and sgRNAs alternately emerged and co-expressed under the control of a single polymerase II promoter...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28722425/self-focused-alscn-film-ultrasound-transducer-for-individual-cell-manipulation
#6
Benpeng Zhu, Chunlong Fei, Chen Wang, Yuhang Zhu, Xiaofei Yang, Hairong Zheng, Qifa Zhou, K Kirk Shung
Precise cell positioning is indispensable in the fields of biophysics and cellular biology. Acoustic microbeam produced by a highly focused ultrasound transducer has recently been investigated for a particle or cell manipulation. By virtue of the relatively good piezoelectric property, Sc doped AlN film was introduced for a highly focused ultrasound transducer application. Using a sputtering approach, a self-focused AlScN film based device has been designed, fabricated, and characterized at a frequency of ∼230 MHz...
January 27, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28722347/foxo3-longevity-interactome-on-chromosome-6
#7
Timothy A Donlon, Brian J Morris, Randi Chen, Kamal H Masaki, Richard C Allsopp, D Craig Willcox, Ayako Elliott, Bradley J Willcox
FOXO3 has been implicated in longevity in multiple populations. By DNA sequencing in long-lived individuals, we identified all single nucleotide polymorphisms (SNPs) in FOXO3 and showed 41 were associated with longevity. Thirteen of these had predicted alterations in transcription factor binding sites. Those SNPs appeared to be in physical contact, via RNA polymerase II binding chromatin looping, with sites in the FOXO3 promoter, and likely function together as a cis-regulatory unit. The SNPs exhibited a high degree of LD in the Asian population, in which they define a specific longevity haplotype that is relatively common...
July 19, 2017: Aging Cell
https://www.readbyqxmd.com/read/28721643/the-scientific-self-reclaiming-its-place-in-the-history-of-research-ethics
#8
Herman Paul
How can the history of research ethics be expanded beyond the standard narrative of codification-a story that does not reach back beyond World War II-without becoming so broad as to lose all distinctiveness? This article proposes a history of research ethics focused on the "scientific self," that is, the role-specific identity of scientists as typically described in terms of skills, competencies, qualities, or dispositions. Drawing on three agenda-setting texts from nineteenth-century history, biology, and sociology, the article argues that the "revolutions" these books sought to unleash were, among other things, revolts against inherited conceptions of scientific selfhood...
July 18, 2017: Science and Engineering Ethics
https://www.readbyqxmd.com/read/28718929/commitment-forgiveness-and-relationship-self-regulation-an-actor-partner-interdependence-model-of-relationship-virtues-and-relationship-effort-in-couple-relationships
#9
Joshua R Novak, Heather M Smith, Jeffry H Larson, D Russell Crane
Dyadic data from 679 committed couples were used to examine associations between commitment, forgiveness, and perceptions of partner's relationship self-regulation (RSR) behaviors-that is effort and strategies that partners exert to maintain the relationship. We found that for both partners, higher self-reports of commitment and forgiveness were associated with higher perceptions of their partner's RSR. For females, higher commitment and forgiveness were associated with higher male perceptions of her RSR, and higher male forgiveness was associated with higher female perceptions of his RSR...
July 18, 2017: Journal of Marital and Family Therapy
https://www.readbyqxmd.com/read/28715618/measurement-of-net-formation-in-vitro-and-in-vivo-by-flow-cytometry
#10
Sakiko Masuda, Sakika Shimizu, Junji Matsuo, Yuka Nishibata, Yoshihiro Kusunoki, Fumihiko Hattanda, Haruki Shida, Daigo Nakazawa, Utano Tomaru, Tatsuya Atsumi, Akihiro Ishizu
Neutrophil extracellular traps (NETs) are extracellular chromatin fibers adorned with antimicrobial proteins, such as myeloperoxidase (MPO), which are extruded from activated neutrophils. NETosis is the metamorphosis of neutrophils with NET formation that follows decondensation of DNA and rupture of the plasma membrane. Although NETs play important roles in innate immunity, excessive formation of NETs can be harmful to the hosts. Until now, various methods for evaluation of NETs have been reported. Although each has a virtue, the gold standard has not been established...
July 17, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28714903/sensing-responses-based-on-transfer-characteristics-of-inas-nanowire-field-effect-transistors
#11
Alex C Tseng, David Lynall, Igor Savelyev, Marina Blumin, Shiliang Wang, Harry E Ruda
Nanowire-based field-effect transistors (FETs) have demonstrated considerable promise for a new generation of chemical and biological sensors. Indium arsenide (InAs), by virtue of its high electron mobility and intrinsic surface accumulation layer of electrons, holds properties beneficial for creating high performance sensors that can be used in applications such as point-of-care testing for patients diagnosed with chronic diseases. Here, we propose devices based on a parallel configuration of InAs nanowires and investigate sensor responses from measurements of conductance over time and FET characteristics...
July 16, 2017: Sensors
https://www.readbyqxmd.com/read/28708174/versatile-backconversion-inhibited-broadband-optical-parametric-amplification-based-on-an-idler-separated-qpm-configuration
#12
Ying Li, Haizhe Zhong, Jianlong Yang, Shiwei Wang, Dianyuan Fan
Conversion efficiency and phase-matching (PM) bandwidth are both critical issues for broadband parametric processes. In some sense, they determine the highest peak power achieved via the optical parametric amplification. In this Letter, a versatile idler-separated quasi-phase matching scheme capable of both backconversion circumvention and ultra-broadband PM is presented. Full-dimensional spatial-temporal simulations for the typical optical parametric chirped pulse amplification processes at 800 nm and 3.4 μm were presented in detail...
July 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28707850/the-virtues-of-scientific-practice-macintyre-virtue-ethics-and-the-historiography-of-science
#13
Daniel J Hicks, Thomas A Stapleford
“Practice” has become a ubiquitous term in the history of science, and yet historians have not always reflected on its philosophical import and in particular on its potential connections with ethics. This essay draws on the work of the virtue ethicist Alasdair MacIntyre to develop a theory of “communal practices” and explore how such an approach can inform the history of science, including allegations about the corruption of science by wealth or power, consideration of scientific ethics or “moral economies,” the role of values in science, the ethical distinctiveness (or not) of scientific vocations, and the relationship between history of science and the practice of science itself...
September 2016: Isis; An International Review Devoted to the History of Science and its Cultural Influences
https://www.readbyqxmd.com/read/28707631/-in-our-own-words-defining-medical-professionalism-from-a-latin-american-perspective
#14
Klaus Puschel, Paula Repetto, Margarita Bernales, Jorge Barros, Ivan Perez, Linda Snell
BACKGROUND: Latin America has experienced a tremendous growth in a number of medical schools, and there are concerns about their quality of training in critical areas such as professionalism. Medical professionalism is a cultural construct. The aim of the study was to compare published definitions of medical professionalism from Latin American and non-Latin American regions and to design an original and culturally sound definition. METHODS: A mixed methods approach was used with three phases...
January 2017: Education for Health: Change in Training & Practice
https://www.readbyqxmd.com/read/28705870/on-the-promotion-of-human-flourishing
#15
Tyler J VanderWeele
Many empirical studies throughout the social and biomedical sciences focus only on very narrow outcomes such as income, or a single specific disease state, or a measure of positive affect. Human well-being or flourishing, however, consists in a much broader range of states and outcomes, certainly including mental and physical health, but also encompassing happiness and life satisfaction, meaning and purpose, character and virtue, and close social relationships. The empirical literature from longitudinal, experimental, and quasiexperimental studies is reviewed in attempt to identify major determinants of human flourishing, broadly conceived...
July 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28704203/nurturing-virtues-of-the-medical-profession-does-it-enhance-medical-students-empathy
#16
Marcelo Schweller, Diego Lima Ribeiro, Eloisa Valer Celeri, Marco Antonio de Carvalho-Filho
Objectives: To examine if the empathy levels of first-year medical students are amenable to didactic interventions idealized to promote values inherent to medical professional identity. Methods: This is a pretest-posttest study designed to assess the empathy levels of first-year medical students (n=166) comprising two consecutive classes of a Brazilian medical school, performed before and after a didactic intervention. Students attended a course based on values and virtues related to medical professional identity once a week over four months...
July 11, 2017: International Journal of Medical Education
https://www.readbyqxmd.com/read/28703810/microrna-148a-deficiency-promotes-hepatic-lipid-metabolism-and-hepatocarcinogenesis-in-mice
#17
Li Cheng, Yahui Zhu, Han Han, Qiang Zhang, Kaisa Cui, Hongxing Shen, Jinxiang Zhang, Jun Yan, Edward Prochownik, Youjun Li
miRNAs are involved in many physiologic and disease processes by virtue of degrading specific mRNAs or inhibiting their translation. miR-148a has been implicated in the control of tumor growth and cholesterol and triglyceride homeostasis using in vitro or in vivo gene expression- and silencing-based approaches. Here miR-148a knockout (KO) mice were used to investigate the intrinsic role of miR-148a in liver physiology and hepatocarcinogenesis in mice. miR-148a downregulation was found to be correlated with poor clinical outcomes in hepatocellular carcinoma (HCC) patients...
July 13, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28697543/porous-%C3%AE-fe2o3-microflowers-synthesis-structure-and-enhanced-acetone-sensing-performances
#18
Chang Liu, Yinglin Wang, Peilu Zhao, Wenbin Li, Qingji Wang, Peng Sun, Xiaohong Chuai, Geyu Lu
Porous α-Fe2O3 microflowers, which were composed of many nanospindles assembled by large numbers of nanoparticles, were successfully synthesized by calcining the FeSO4(OH) precursor prepared through a simple ethanol-mediated method. Various techniques were employed to obtain the crystalline and morphological properties of the as-prepared products. The formation process of such microstructure was proposed according to the morphology and component of the products obtained at different reaction time. Moreover, the obtained α-Fe2O3 was utilized as sensing materials upon exposure to various test gases...
July 4, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28697011/association-between-adipokines-and-critical-illness-outcomes
#19
Tahar Hajri, Mohamed Gharib, Sanjeev Kaul, Martin S Karpeh
BACKGROUND: Adipose tissue is an endocrine organ that plays a critical role in immunity and metabolism by virtue of a large number of hormones and cytokines, collectively termed adipokines. Dysregulation of adipokines has been linked to the pathogenesis of multiple diseases, but some questions have arisen concerning the value of adipokines in critical illness setting. The objective of this review was to evaluate the associations between blood adipokines and critical illness outcomes. METHODS: PubMed, CINAHL, Scopus and the Cochrane Library databases were searched from inception through July 2016 without language restriction...
July 8, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28696554/solution-grown-cspbbr3-cs4-pbbr6-perovskite-nanocomposites-toward-temperature-insensitive-optical-gain
#20
Yue Wang, Dejian Yu, Zeng Wang, Xiaoming Li, Xiaoxuan Chen, Venkatram Nalla, Haibo Zeng, Handong Sun
With regards to developing miniaturized coherent light sources, the temperature-insensitivity in gain spectrum and threshold is highly desirable. Quantum dots (QDs) are predicted to possess a temperature-insensitive threshold by virtue of the separated electronic states; however, it is never observed in colloidal QDs due to the poor thermal stability. Besides, for the classical II-VI QDs, the gain profile generally redshifts with increasing temperature, plaguing the device chromaticity. Herein, this paper addresses the above two issues simultaneously by embedding ligands-free CsPbBr3 nanocrystals in a wider band gap Cs4 PbBr6 matrix by solution-phase synthesis...
July 11, 2017: Small
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