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https://www.readbyqxmd.com/read/28213296/purification-of-quercetin-3-o-sophoroside-and-isoquercitrin-from-poacynum-hendersonii-leaves-using-macroporous-resins-followed-by-sephadex-lh-20-column-chromatography
#1
Hongjuan Li, Ying Liu, Yuetao Yi, Qin Miao, Sujing Liu, Feng Zhao, Wei Cong, Chunhua Wang, Chuanhai Xia
In China, Poacynum hendersonii is frequently used as a substitute for Apoacynum venetum L (Luobuma), which is a famous traditional Chinese medicine. Quercetin-3-O-sophoroside and isoquercitrin are two major flavonoids in Poacynum hendersonii leaves. In this work, a suitable method was established for the large-scale preparation of quercetin-3-O-sophoroside (QOS) and isoquercitrin (ISO) from Poacynum hendersonii leaves using macroporous resin combined with Sephadex LH-20 column chromatography. The adsorption/desorption capacities and desorption ratios of six macroporous resins were evaluated using static experiments...
February 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28194976/reversible-photoisomerization-among-triplet-amino-naphthylnitrene-triplet-diimine-biradical-and-indazole-matrix-isolation-ir-spectra-of-8-amino-1-naphthylnitrene-1-8-naphthalenediimine-and-1-2-dihydrobenz-cd-indazole
#2
Takuya Okamura, Nobuyuki Akai, Munetaka Nakata
Reaction mechanisms of nitrene, one of the most famous biradicals, have been frequently studied, and many spectral data have been obtained so far. In the present study, the experimental IR spectra of triplet 8-amino-1-naphthylnitrene ((3)ANN), a triplet diimine biradical 1,8-dihydro-1,8-naphthalenediimine ((3)DND), and 1,2-dihydrobenz[cd]indazole (DBI), which are produced in the UV photolysis of 1,8-diaminonaphthalene in an Ar matrix and identified by a combination method of IR spectroscopy and DFT quantum chemical calculations, are first reported...
February 17, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28194278/burns-and-frostbite-in-the-red-army-during-world-war-ii
#3
Vladimir Sokolov, Alexey Biryukov, Igor Chmyrev, Mikhail Tarasenko, Pavel Kabanov
The start of World War II (WWII) led to the deployment of combat troops in several continents. Destruction and many casualties among both the military and civilians became an inevitable consequence. A large amount of people injured were in need of life-saving treatment and a speedy return to duty. Intensive studies of the specific issues of diagnosis and treatment of thermal injury were conducted in the Soviet Union before the war. The first special units for patients with burn injuries were created, and the first specialists received their first clinical experience...
2017: Military Medical Research
https://www.readbyqxmd.com/read/28192718/quantitative-determination-of-five-metabolites-of-aspirin-by-uhplc-ms-ms-coupled-with-enzymatic-reaction-and-its-application-to-evaluate-the-effects-of-aspirin-dosage-on-the-metabolic-profile
#4
Jian-Ping Li, Jian-Ming Guo, Er-Xin Shang, Zhen-Hua Zhu, Yang Liu, Bu-Chang Zhao, Jing Zhao, Zhi-Shu Tang, Jin-Ao Duan
Acetylsalicylic acid (Aspirin, ASA) is a famous drug for cardiovascular diseases in recent years. Effects of ASA dosage on the metabolic profile have not been fully understood. The purpose of our study is to establish a rapid and reliable method to quantify ASA metabolites in biological matrices, especially for glucuronide metabolites whose standards are not commercially available. Then we applied this method to evaluate the effects of ASA dosage on the metabolic and excretion profile of ASA metabolites in rat urine...
December 29, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28188555/curvature-effects-on-the-velocity-profile-in-turbulent-pipe-flow
#5
Siegfried Grossmann, Detlef Lohse
Prandtl and von Kármán have developed the famous log-law for the mean velocity profile for turbulent flow over a plate. The log-law has also been applied to turbulent pipe flow, though the wall surface is curved (in span-wise direction) and has finite diameter. Here we discuss the theoretical framework, based on the Navier-Stokes equations, with which one can describe curvature effects and also the well-known finite-size effects in the turbulent mean-velocity profile. When comparing with experimental data we confirm that the turbulent eddy viscosity must contain both curvature and finite-size contributions and that the usual ansatz for the turbulent eddy viscosity as being linear in the wall distance is insufficient, both for small and large wall distances...
February 2017: European Physical Journal. E, Soft Matter
https://www.readbyqxmd.com/read/28186185/triplet-p-wave-pairing-correlation-in-low-doped-zigzag-graphene-nanoribbons
#6
Tianxing Ma, Fan Yang, Zhongbing Huang, Hai-Qing Lin
We reveal an edge spin triplet p-wave superconducting pairing correlation in slightly doped zigzag graphene nanoribbons. By employing a method that combines random-phase approximation, the finite-temperature determinant quantum Monte Carlo approach, and the ground-state constrained-path quantum Monte Carlo method, it is shown that such a spin-triplet pairing is mediated by the ferromagnetic fluctuations caused by the flat band at the edge. The spin susceptibility and effective pairing interactions at the edge strongly increase as the on-site Coulomb interaction increases, indicating the importance of electron-electron correlations...
February 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28185654/assessment-of-nutrient-and-heavy-metal-contamination-in-the-seawater-and-sediment-of-yalujiang-estuary
#7
Hongjun Li, Lin Lin, Sheng Ye, Hongbo Li, Jingfeng Fan
Yalujiang River is a famous border river between China and North Korea. In this study, 22 sample sites (seawater and sediments) were investigated to determine the concentrations of nutrients (dissolved inorganic nitrogen and soluble reactive phosphorus) and trace elements (Hg, As, Pb, Cu, Cd, Cr, and Zn) during the flood season (August). Generally, the concentration of nutrients were higher in the entrance of the estuary than that in the downstream region and the trophic index ranged from moderate to high production, indicating a potential eutrophication risk...
February 6, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28162034/persons-living-with-hiv-infection-on-antiretroviral-therapy-also-consulting-traditional-healers-a-study-in-three-african-countries
#8
Jane N Wanyama, Sharon Tsui, Cynthia Kwok, Rhoda K Wanyenze, Julie A Denison, Olivier Koole, Eric van Praag, Barbara Castelnuovo, Fred Wabwire-Mangen, Gideon P Kwesigabo, Robert Colebunders
Traditional healers provide healthcare to a substantial proportion of people living with HIV infection (PLHIV) in high HIV burden countries in sub-Saharan Africa. However, the impact on the health of retained patients visiting traditional healers is unknown. In 2011, a study to asses adherence to anti-retroviral therapy (ART) performed in 18 purposefully selected HIV treatment centers in Tanzania, Zambia and Uganda showed that 'consulting a traditional healer/herbalist because of HIV' was an independent risk factor for incomplete ART adherence...
January 1, 2017: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/28160297/-thinking-ill-of-others-without-sufficient-warrant-transcending-the-accuracy-inaccuracy-dualism-in-prejudice-and-stereotyping-research
#9
John Dixon
Research on prejudice seeks to understand and transform inaccurate beliefs about others. Indeed, historically such research has offered a cautionary tale of the biased nature of human cognition. Recently, however, this view has been challenged by work defending the essential rationality of intergroup perception, a theme captured controversially in Jussim and colleagues' (2009) research on the 'unbearable accuracy of stereotyping'. The present paper argues that in its own terms the 'rationalist turn' in socio-cognitive research on stereotyping presents an important challenge to the prejudice tradition, raising troubling questions about its conceptual and empirical foundations...
February 3, 2017: British Journal of Social Psychology
https://www.readbyqxmd.com/read/28158318/the-first-complete-chloroplast-genome-sequences-of-ulmus-species-by-de-novo-sequencing-genome-comparative-and-taxonomic-position-analysis
#10
Li-Hui Zuo, Ai-Qin Shang, Shuang Zhang, Xiao-Yue Yu, Ya-Chao Ren, Min-Sheng Yang, Jin-Mao Wang
Elm (Ulmus) has a long history of use as a high-quality heavy hardwood famous for its resistance to drought, cold, and salt. It grows in temperate, warm temperate, and subtropical regions. This is the first report of Ulmaceae chloroplast genomes by de novo sequencing. The Ulmus chloroplast genomes exhibited a typical quadripartite structure with two single-copy regions (long single copy [LSC] and short single copy [SSC] sections) separated by a pair of inverted repeats (IRs). The lengths of the chloroplast genomes from five Ulmus ranged from 158,953 to 159,453 bp, with the largest observed in Ulmus davidiana and the smallest in Ulmus laciniata...
2017: PloS One
https://www.readbyqxmd.com/read/28157365/scaling-of-tripartite-entanglement-at-impurity-quantum-phase-transitions
#11
Abolfazl Bayat
The emergence of a diverging length scale in many-body systems at a quantum phase transition implies that total entanglement has to reach its maximum there. In order to fully characterize this, one has to consider multipartite entanglement as, for instance, bipartite entanglement between individual particles fails to signal this effect. However, quantification of multipartite entanglement is very hard, and detecting it may not be possible due to the lack of accessibility to all individual particles. For these reasons it will be more sensible to partition the system into relevant subsystems, each containing a few to many spins, and study entanglement between those constituents as a coarse-grain picture of multipartite entanglement between individual particles...
January 20, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28154418/triplet-p-wave-pairing-correlation-in-low-doped-zigzag-graphene-nanoribbons
#12
Tianxing Ma, Fan Yang, Zhongbing Huang, Hai-Qing Lin
We reveal an edge spin triplet p-wave superconducting pairing correlation in slightly doped zigzag graphene nanoribbons. By employing a method that combines random-phase approximation, the finite-temperature determinant quantum Monte Carlo approach, and the ground-state constrained-path quantum Monte Carlo method, it is shown that such a spin-triplet pairing is mediated by the ferromagnetic fluctuations caused by the flat band at the edge. The spin susceptibility and effective pairing interactions at the edge strongly increase as the on-site Coulomb interaction increases, indicating the importance of electron-electron correlations...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28152891/with-quality-and-safety-for-all-risking-optimal-care-with-vip-patients
#13
(no author information available yet)
: 142 Background: The person deemed a VIP is generally considered differentiated from the average person by virtue of fame, notoriety (positive or negative), or success through talent, tenacity or simple luck. Because society often views VIPs as special, this can generate strong feelings ranging from excitement and awe to resentment in those who encounter a VIP. VIPs and/or their entourage may request or demand special attention. The unique factors associated with caring for a VIP can jeopardize patient safety and optimal care of the VIP patient...
March 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28151981/optical-measurements-of-paintings-and-the-creation-of-an-artwork-database-for-authenticity
#14
Seonhee Hwang, Hyerin Song, Soon-Woo Cho, Chang Eun Kim, Chang-Seok Kim, Kyujung Kim
Paintings have high cultural and commercial value, so that needs to be preserved. Many techniques have been attempted to analyze properties of paintings, including X-ray analysis and optical coherence tomography (OCT) methods, and enable conservation of paintings from forgeries. In this paper, we suggest a simple and accurate optical analysis system to protect them from counterfeit which is comprised of fiber optics reflectance spectroscopy (FORS) and line laser-based topographic analysis. The system is designed to fully cover the whole area of paintings regardless of its size for the accurate analysis...
2017: PloS One
https://www.readbyqxmd.com/read/28149390/biomechanics-as-a-window-into-the-neural-control-of-movement
#15
Mark L Latash
Biomechanics and motor control are discussed as parts of a more general science, physics of living systems. Major problems of biomechanics deal with exact definition of variables and their experimental measurement. In motor control, major problems are associated with formulating currently unknown laws of nature specific for movements by biological objects. Mechanics-based hypotheses in motor control, such as those originating from notions of a generalized motor program and internal models, are non-physical...
September 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28146194/-a-critical-regard-over-the-medicine-in-the-ancient-egypt
#16
Walter Ledermann
Generally, writing about the medicine in the Ancient Egypt, historians adopt an approach rather benevolent than critical, giving to its practice merits that never had. Reading without prejudice the famous twelve papyri -and now one more- we can't less to pronounce a condemnatory sentence, because at the end this medicine looks like a patchwork of ignorance, superstition, magic believes and a pair of grains of knowledge. However, we can rescue its surgical practice, very useful, sometimes efficient, and quite necessary in those centuries of war, slavery and permanent abuse of the weak and the poor people by the high political rulers and priests...
December 2016: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/28136158/jan-evangelista-purkyn%C3%A4-1787-1869-and-his-instruments-for-microscopic-research-in-the-field-of-neuroscience
#17
Alexandr Chvátal
The findings obtained by the famous nineteenth-century Czech scientist Jan Evangelista Purkyně (1787-1869) in the field of microscopic structure of animal and human tissues, including the brain, spinal cord, and nerves, have already been described in depth in a number of older and newer publications. The present article contains an overview of the instruments and tools that Purkyně and his assistants used for microscopic research of tissue histology. Some of these instruments were developed either by Purkyně alone, such as the microtomic compressor, or together with his assistant Adolph Oschatz, such as the microtome...
January 31, 2017: Journal of the History of the Neurosciences
https://www.readbyqxmd.com/read/28134331/quantum-interference-and-selectivity-through-biological-ion-channels
#18
Vahid Salari, Hamidreza Naeij, Afshin Shafiee
The mechanism of selectivity in ion channels is still an open question in biology for more than half a century. Here, we suggest that quantum interference can be a solution to explain the selectivity mechanism in ion channels since interference happens between similar ions through the same size of ion channels. In this paper, we simulate two neighboring ion channels on a cell membrane with the famous double-slit experiment in physics to investigate whether there is any possibility of matter-wave interference of ions via movement through ion channels...
January 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28132055/atmosphere-on-the-phenomenology-of-atmospheric-alterations-in-schizophrenia-overall-sense-of-reality-familiarity-vitality-meaning-or-relevance-ancillary-article-to-eawe-domain-5
#19
Louis Sass, Matthew Ratcliffe
"Atmospheric" alterations are key aspects of altered subjectivity in mental disorder. Karl Jaspers famously described the "delusional mood": a sense of uncanny salience and ominousness that often precedes the onset of schizophrenic psychosis or of delusions. Such experiences, he writes, involve "a transformation in our total awareness of reality" that often verges on ineffability. In psychiatry, these experiential alterations are often referred to in terms of "derealization." Though derealization most obviously refers to a decline in the sense of objective presence or felt actuality, it can also refer to other unusual experiences in which things seem unlike normal or standard reality, including altered familiarity, vitality, meaning, or relevance...
January 28, 2017: Psychopathology
https://www.readbyqxmd.com/read/28129191/finite-time-stabilization-of-delayed-memristive-neural-networks-discontinuous-state-feedback-and-adaptive-control-approach
#20
Zuowei Cai, Lihong Huang
In this paper, a general class of delayed memristive neural networks (DMNNs) system described by functional differential equation with discontinuous right-hand side is considered. Under the extended Filippov-framework, we investigate the finite-time stabilization problem for DMNNs by using the famous finite-time stability theorem and the generalized Lyapunov functional method. To do so, we design two classes of novel controllers including discontinuous state-feedback controller and discontinuous adaptive controller...
January 25, 2017: IEEE Transactions on Neural Networks and Learning Systems
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