cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Morphological and physiological responses of Calobota sericea plants subjected to water limitation and subsequent rewatering
Creators: name: Müller, Francuois
name: Raitt, Lincoln
name: Cyster, Lilburne
name: Chimphango, Samson
name: Samuels, M Igshaan
name: Cupido, Clement
name: Boatwright, J Stephen
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology

description: Calobota sericea is a native legume of South Africa, confined to the water-limited rangelands, and it has recently been prioritised for additional characterisation regarding its pasture potential. In this study, we examined the growth characteristics of C. sericea under glasshouse conditions where water limitation was implemented at different plant ages, and for different durations. Results indicate that preferential resource allocation to the roots, as well as reduced stomatal conductance and transpiration, were early responses to water limitation, irrespective of the age at which water limitation was imposed, or the duration of water limitation. Under water-limited conditions, increased production of protective pigments, such as carotenoids and anthocyanins, was also observed, which helped in recovery after rewatering. It was concluded that after rewatering, all negative impacts of water limitation on morphology and physiology of C. sericea plants were generally returned to well-watered levels. This suggests that C. sericea plants employ a wide range of phenotypic adjustments in response to water limitation, which makes the plants well adapted to areas with high rainfall variability.
Phenomenological modeling of combustion and NOx emissions using detailed tabulated chemistry methods in diesel engines
Creators: name: Rezaei, Reza
name: Dinkelacker, Friedrich
name: Tilch, Benjamin
name: Delebinski, Thaddaeus
name: Brauer, Maximilian
Publisher: name: London : SAGE Publications Ltd.
Year: 2016
Subjects: subject: combustion
subject: Diesel engine
subject: NOx emissions
subject: phenomenological modeling
subject: reaction kinetics
subject: Combustion
subject: Engine cylinders
subject: Engines
subject: Exhaust gas recirculation
subject: Exhaust gases
subject: Ignition
subject: Kinetics
subject: Reaction kinetics
subject: Computational effort
subject: Detailed chemical kinetic
subject: Heavy-duty diesel engine
subject: Light-duty diesel engines
subject: Perfectly stirred reactor
subject: Phenomenological modeling
subject: Transient conditions
subject: Diesel engines
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik

description: Enhancing the predictive quality of engine models, while maintaining an affordable computational cost, is of great importance. In this study, a phenomenological combustion and a tabulated NOx model, focusing on efficient modeling and improvement of computational effort, is presented. The proposed approach employs physical and chemical sub-models for local processes such as injection, spray formation, ignition, combustion, and NOx formation, being based on detailed tabulated chemistry methods. The applied combustion model accounts for the turbulence-controlled as well as the chemistry-controlled combustion. The phenomenological combustion model is first assessed for passenger car application, especially with multiple pilot injections and high exhaust gas recirculation ratios for low-load operating points. The validation results are presented for representative operating conditions from a single-cylinder light-duty diesel engine and over the entire engine map of a heavy-duty diesel engine. In the second part of this study, a novel approach for accurate and very fast modeling of NO formation in combustion engines is proposed. The major focus of this study is on the development of a very fast-running NO mechanism for usage in the next generation of the engine control units. This approach is based on tabulation of a detailed chemical kinetic mechanism and is validated against the detailed chemical reaction mechanism at all engine-relevant conditions with the variation in pressure, temperature, and air-fuel ratio under stationary and ramp-type transient conditions in a perfectly stirred reactor. Using this approach, a very good match to the results from calculations with the detailed chemical mechanism is observed. Finally, the tabulated NOx kinetic model is implemented in the combustion model for in-cylinder NOx prediction and compared with the experimental engine measurement data. © 2015 Institution of Mechanical Engineers.
Symmetries of finite Heisenberg groups for multipartite systems
Creators: name: Korbelar, M.
name: Tolar, J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A composite quantum system comprising a finite number k of subsystems which are described with position and momentum variables in Z_{n_{i}}, i=1,...,k, is considered. Its Hilbert space is given by a k-fold tensor product of Hilbert spaces of dimensions n_{1},...,n_{k}. Symmetry group of the respective finite Heisenberg group is given by the quotient group of certain normalizer. This paper extends our previous investigation of bipartite quantum systems to arbitrary multipartite systems of the above type. It provides detailed description of the normalizers and the corresponding symmetry groups. The new class of symmetry groups represents a very specific generalization of symplectic groups over modular rings. As an application, a new proof of existence of the maximal set of mutually unbiased bases in Hilbert spaces of prime power dimensions is provided.
description: 18 pages
Friedel oscillations in the open Hubbard chain
Creators: name: Bedürftig, G.
name: Brendel, B.
name: Frahm, Holger
name: Noack, R.M.
Publisher: name: College Park (Maryland) : American Physical Society
Year: 1998
Subjects: subject: density-matrix renormalization-group
subject: Bethe ansatz
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Using the density-matrix renormalization-group (DMRG) technique, we calculate critical exponents for the one-dimensional Hubbard model with open boundary conditions with and without additional boundary potentials at both ends. A direct comparison with open boundary condition Bethe ansatz calculations provides a good check for the DMRG calculations on large system sizes. On the other hand, the DMRG calculations provide an independent check of the predictions of conformal field theory, which are needed to obtain the critical exponents from the Bethe ansatz. From the Bethe ansatz we predict the behavior of the 1/L-corrected mean value of the Friedel oscillations (for the density and the magnetization) and the characteristic wave vectors, and show numerically that these conjectures are fulfilled with and without boundary potentials. The quality of the numerical results allows us to determine the behavior of the coefficients of the Friedel oscillations as a function of the Hubbard interaction.
Two new eudesmane sesquiterpene glucosides from the aerial parts of Artemisia vulgaris
Creators: name: Hanh, Tran Thi Hong
name: Le Ba Vinh
name: Cuong, Nguyen Xuan
name: Quang, Tran Hong
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer

description: Using combined chromatographic methods, two new sesquiterpene glucosides, vulgarosides A (1) and B (2), and two known analogs ainsliaside E (3) and pumilaside A (4) were isolated from the aerial parts of Artemisia vulgaris. Their chemical structures were established by spectroscopic methods, including one and two-dimensional nuclear magnetic resonance (1 D and 2 D-NMR) spectroscopy and high-resolution electrospray ionization mass spectrometry (HR-ESI-MS). In addition, their cytotoxicity on five human cancer cell lines, including KB (epidermoid carcinoma), HepG2 (hepatocarcinoma), MCF7 (breast carcinoma), SK-Mel-2 (melanoma), and LNCaP (prostate cancer) was also evaluated by the SRB assay. However, none of the tested eudesmane sesquiterpene glycosides showed significant cytotoxicity (IC50>100 µM).
Three new 8,4′-type oxyneolignans from the seeds of Ziziphus jujuba mill and their antitumor studies
Creators: name: Liu, Si-Yu
name: Gu, Bin
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Space Science
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Ziziphus jujuba Mill. is a deciduous shrub, belonging to the Rhamnaceae family. Phytochemical investigation of Z. jujuba seeds showed the presence of three undescribed 8,4′-type oxyneolignans (1-3). Their structures were elucidated by comprehensive spectroscopic analyses. All isolated compounds were tested for antitumor activity against two human hepatoma cells (Hep3B and HepG2) and exhibited moderate cytotoxicity (IC50: 33.79-49.62 µM).
Electron flow in split-gated bilayer graphene
Creators: name: Dröscher, S.
name: Barraud, C.
name: Watanabe, K.
name: Taniguchi, T.
name: Ihn, T.
name: Ensslin, K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present transport measurements on a bilayer graphene sheet with homogeneous back gate and split top gate. The electronic transport data indicates the capability to direct electron flow through graphene nanostructures purely defined by electrostatic gating. By comparing the transconductance data recorded for different top gate geometries - continuous barrier and split-gate - the observed transport features for the split-gate can be attributed to interference effects inside the narrow opening.
Synthesis and DFT-NMR-guided structure revision of cremenolide
Creators: name: Takeda, Keita
name: Katsuta, Ryo
name: Yajima, Arata
name: Ishigami, Ken
name: Kuwahara, Shigefumi
name: Nukada, Tomoo
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: Plant Biology
subject: FOS: Biological sciences

description: The structure of an anti-plant pathogenic and plant growth-promoting nonenolide, namely cremenolide, was revised by an efficient combination of DFT-based theoretical NMR calculations and synthesis of a target diastereomer. Initially, the planar structure of cremenolide was reconsidered by an individual analysis of the reported NMR spectra. Subsequently, the relative configuration was predicted using NMR calculations of all possible diastereomers based on the ωB97X-D functional. Finally, the relative configuration of cremenolide was unambiguously confirmed by preparation of the proposed structure.
ACCESS-Background rate of adverse events-definition –(Meningo)encephalitis
Creators: name: van Wijngaarden, P
name: Belbachir, L
name: Durán, C
name: Souverein, P
name: Martín-Pérez, M
name: García-Poza, P
name: Sturkenboom, MCJM
Publisher: name: Zenodo
Year: 2021
Subjects: electronic health care databases, codes, AESI, vaccine, encephalitis

description: This document contains the definition of (Meningo)Encephalitis and the operationalization to extract this event from different electronic health care databases in the EU, to calculate background rates of AESI The document contains the key definition, procedures and treatments, the diagnosis codes based on Codemapper output with changes/additions by data access providers, and when available published validation studies and background rates
description: This study (ACCESS project) was funded by the European Medicines Agency
Dietary iron intake and iron status of German female vegans: Results of the German Vegan Study
Creators: name: Waldmann, Annika
name: Koschizke, Jochen W.
name: Leitzmann, Claus
name: Hahn, Andreas
Publisher: name: Basel : S. Karger AG
Year: 2004
Subjects: subject: Dietary iron intake
subject: Iron deficiency
subject: Iron status
subject: Vegans, female
subject: ferritin
subject: iron
subject: adult
subject: aged
subject: article
subject: blood analysis
subject: cereal
subject: clinical article
subject: controlled study
subject: correlation analysis
subject: dietary intake
subject: ethnic group
subject: evaluation
subject: female
subject: ferritin blood level
subject: fruit
subject: health care organization
subject: hemoconcentration
subject: human
subject: iron deficiency
subject: iron deficiency anemia
subject: iron intake
subject: methodology
subject: parameter
subject: priority journal
subject: questionnaire
subject: vegetable
subject: vegetarian
subject: Adult
subject: Anemia, Iron-Deficiency
subject: Cross-Sectional Studies
subject: Diet Surveys
subject: Diet, Vegetarian
subject: Female
subject: Ferritins
subject: Germany
subject: Health Surveys
subject: Humans
subject: Intestinal Absorption
subject: Iron, Dietary
subject: Middle Aged
subject: Nutrition Policy
subject: Nutritional Status
subject: Nutritive Value
subject: Questionnaires
subject: Pomacanthus maculosus
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: Background: As shown in previous studies vegetarians and especially vegans are at risk for iron deficiency. Our study evaluated the iron status of German female vegans. Methods: In this cross-sectional study, the dietary intakes of 75 vegan women were assessed by two 9-day food frequency questionnaires. The iron status was analyzed on the basis of blood parameters. Results: Mean daily iron intake was higher than recommended by the German Nutrition Society. Still 42% of the female vegans <50 years (young women, YW) had a daily iron intake of <18 mg/day, which is the recommended allowance by the US Food and Nutrition Board. The main dietary sources of iron were vegetables, fruits, cereals and cereal products. Median serum ferritin concentrations were 14 ng/ml for YW and 28 ng/ml for women ≥50 years (old women, OW). In all, 40% (tri-index model (TIM) 20%) of the YW and 12% (TIM 12%) of the OW were considered iron-deficient based on either serum ferritin levels of <12 ng/ml or a TIM. Only 3 women had blood parameters which are defined as iron deficiency anemia. Correlations between serum ferritin levels and dietary factors were not found. Conclusion: Although the mean iron intake was above the recommended level, 40% (TIM 20%) of the YW were considered iron-deficient. It is suggested that especially YM on a vegan diet should have their iron status monitored and should consider taking iron supplements in case of a marginal status. Copyright © 2004 S. Karger AG, Basel.
Assessing long-term nutrient and lime enrichment effects on a subtropical South African grassland
Creators: name: Zama, Naledi
name: Magadlela, Anathi
name: Mkhize, Ntuthuko
name: Tedder, Michelle
name: Kirkman, Kevin
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Plant Biology

description: Nutrient enrichment influences grassland ecosystem structure, typically manifested by reduced species richness and increased productivity. Quantifying the long-term impacts of nutrient enrichment on grasslands contributes to understanding eutrophication effects on grassland, particularly for grasslands adapted to low soil nutrient status. Overextended time periods, nutrient enrichment may modify soil fertility. The Ukulinga Grassland Nutrient Experiment situated on a natural C4 grassland was set up in 1951 on the Ukulinga research farm, South Africa. Continuously applied treatments on plots measuring 2.7 × 9 m include combinations of nitrogen at 0, 7, 14 and 21 g m−2 per annum, phosphorus at 0 and 2.8 g m−2 per annum and lime at 0 and 225 g m−2 applied every five years. Nitrogen sources included ammonium sulphate (acidifying) and limestone ammonium nitrate (less acidifying). Grass species composition was influenced by both nitrogen forms. In contrast, forb species composition was more sensitive to LAN. We found evidence of nitrogen limitation on aboveground net-primary production. However, species richness (for grass and forbs) declined with increasing ammonium sulphate levels, owing to increased soil acidity and high aluminium concentrations. Aluminium toxicity can affect overall species composition by replacing Al-sensitive species with Al-tolerant species on site.
Coherent quantum ratchets driven by tunnel oscillations: Fluctuations and correlations
Creators: name: Hussein, Robert
name: Kohler, Sigmund
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study two capacitively coupled double quantum dots focusing on the regime in which one double dot is strongly biased, while no voltage is applied to the other. Then the latter experiences an effective driving force which induces a ratchet current, i.e., a dc current in the absence of a bias voltage. Its current noise is investigated with a quantum master equation in terms of the full-counting statistics. This reveals, that whenever the ratchet current is large, it also exhibits some features of a Poissonian process. By eliminating the drive circuit, we obtain a reduced master equation which provides analytical results for the Fano factor.
description: 10 pages
Automated Marble Plate Classification System Based On Different Neural Network Input Training Sets and PLC Implementation
Creators: name: Topalova, Irina
Publisher: name: arXiv
Year: 2012
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The process of sorting marble plates according to their surface texture is an important task in the automated marble plate production. Nowadays some inspection systems in marble industry that automate the classification tasks are too expensive and are compatible only with specific technological equipment in the plant. In this paper a new approach to the design of an Automated Marble Plate Classification System (AMPCS),based on different neural network input training sets is proposed, aiming at high classification accuracy using simple processing and application of only standard devices. It is based on training a classification MLP neural network with three different input training sets: extracted texture histograms, Discrete Cosine and Wavelet Transform over the histograms. The algorithm is implemented in a PLC for real-time operation. The performance of the system is assessed with each one of the input training sets. The experimental test results regarding classification accuracy and quick operation are represented and discussed.
description: 7 pages, 11 figures, 1 table, (IJARAI) International Journal of Advanced Research in Artificial Intelligence, Vol. 1, No. 2, 2012; ISSN:2165-4069(Online), ISSN:2165-4050 (Print)
Zur Rezension von Dietmar Schmitz zu: Yannick Spies, Kornelbibliographie
Creators: name: Dunsch, Boris
name: Prokoph, Felix M.
Publisher: name: Forum Classicum
Year: 2019

description: Rezension zu: Zur Rezension von Dietmar Schmitz zu: Yannick Spies, Kornelbibliographie [bei Schmitz hier: Kornelbiographie]. Die gesamte Literatur von und über Cornelius Nepos bis zum Ende des Jahres 2015. Universitätsverlag Winter: Heidelberg 2017, erschienen in: Forum Classicum 2/2018, S. 143-145
description: Forum Classicum, Nr. 4 (2018): Forum Classicum
Identification of potentially bioactive compounds from Blumea lacera essential oil by gas chromatography-mass spectroscopy and molecular docking studies for targeting inflammatory bowel disease
Creators: name: Joshi, Rajesh K.
name: Pai, Sandeep R.
name: Nagarajan, Hemavathy
name: Vetrivel, Umashankar
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Blumea lacera (Burm.f.) DC. (Asteraceae) is used in the traditional system of medicine for the treatment of inflammation or irritable bowel disease (IBD). In this study, B. lacera was collected from different geographical regions and oil was extracted by hydro-distillation and further chemo-profiled using GC-FID-MS. The major compounds identified were 2,5-dimethoxy-p-cymene (28.7–0.4%), β-caryophyllene (25.5–0.5%), carvotanacetone (24.5–0.4%), chrysanthenone (21.9–9.8%) and 2,6-dimethyl phenol (11.4–1.8%). The constituents of B. lacera also showed marked qualitative and quantitative variations. The percent chemical similarity was observed to be in the range of 51.7% to 59.2% between the localities. Moreover, molecular modelling, membrane molecular dynamics simulations, target prediction were implemented to decipher the potential targets relevant to IBD. This inferred that all these major compounds could be potential drug moieties for treating IBD in terms of targeting h5HTR3A, thereby substantiating the traditional use of B. lacera for the treatment of IBD ailments.
[Review untitled to: Seizi Iwata: A Lexical Network Approach to Verbal Semantics]
Creators: name: Schulze, Rainer
Publisher: name: Berlin : Walter de Gruyter
Year: 2001
Subjects: subject: verbal semantics
subject: Semantik
subject: Generative Semantik
subject: Interpretative Semantik
subject: Semantisches Netz
subject: Valenz
subject: Verb
subject: Dewey Decimal Classification::400 | Sprache, Linguistik

description: Rezension zu: Seizi Iwata: A Lexical Network Approach to Verbal Semantics. - Tokyo : Kaitakusha, 1998, xvii+253 pp.. ISBN 4-7589-0192-9
[Review untitled to: Claudia Lainka: Analysing Masculinities : Konstruktionen von Männlichkeit bei D. H. Lawrence und John Cowper Powys]
Creators: name: Funk, Wolfgang
Publisher: name: Berlin : Walter de Gruyter
Year: 2014
Subjects: subject: language
subject: linguistics
subject: literature
subject: masculinity
subject: Lawrence, D. H.
subject: Powys, John Cowper
subject: Englisch
subject: Literatur
subject: Männlichkeit
subject: Rezension
subject: Dewey Decimal Classification::400 | Sprache, Linguistik::420 | Englisch
subject: Dewey Decimal Classification::800 | Literatur, Rhetorik, Literaturwissenschaft::820 | Englische Literatur

description: Review to: Claudia Lainka: Analysing Masculinities : Konstruktionen von Männlichkeit bei D. H. Lawrence und John Cowper Powys. Leipzig: Leipziger Universitätsverlag, 2012, 404 S. ISBN: 978-3-86583-718-9
An Independent Measurement of the Incidence of MgII Absorbers along Gamma-Ray Burst Sightlines: the End of the Mystery?
Creators: name: Cucchiara, A.
name: Prochaska, J. X.
name: Zhu, G.
name: Ménard, B.
name: Fynbo, J. P. U.
name: Fox, D. B.
name: Chen, H. -W.
name: Cooksey, K. L.
name: Cenko, S. B.
name: Perley, D.
name: Bloom, J. S.
name: Berger, E.
name: Tanvir, N. R.
name: D'Elia, V.
name: Vergani, S.
name: Lopez, S.
name: Chornock, R.
name: deJaeger, Thomas
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In 2006, Prochter et al. reported a statistically significant enhancement of very strong Mg II absorption systems intervening the sightlines to gamma-ray bursts (GRBs) relative to the in- cidence of such absorption along quasar sightlines. This counterintuitive result, has inspired a diverse set of astrophysical explanations (e.g. dust, gravitational lensing) but none of these has obviously resolved the puzzle. Using the largest set of GRB afterglow spectra available, we reexamine the purported enhancement. In an independent sample of GRB spectra with a survey path 3 times larger than Prochter et al., we measure the incidence per unit redshift of $\geq 1$Årest-frame equivalent width Mg II absorbers at $z \approx 1$ to be l(z)= 0.18 $\pm$ 0.06. This is fully consistent with current estimates for the incidence of such absorbers along quasar sightlines. Therefore, we do not confirm the original enhancement and suggest those results suffered from a statistical fluke. Signatures of the original result do remain in our full sample (l(z) shows an $\approx 1.5$ enhancement over l(z)QSO), but the statistical significance now lies at $\approx 90%$ c.l. Restricting our analysis to the subset of high-resolution spectra of GRB afterglows (which overlaps substantially with Prochter et al.), we still reproduce a statistically significant enhancement of Mg II absorption. The reason for this excess, if real, is still unclear since there is no connection between the rapid afterglow follow-up process with echelle (or echellette) spectrographs and the detectability of strong Mg II doublets. Only a larger sample of such high-resolution data will shed some light on this matter.
description: 42 pages, 22 figures, submitted to ApJ
Crystalline bis(η5-cyclopentadienyl)bis(benzoato/carboxylato)titanium(IV) precursor-directed route to functional titanium dioxide nanomaterials
Creators: name: Baul, Tushar S. Basu
name: Manne, Rajesh
name: Tiekink, Edward R. T.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology

description: Five titanocene(IV) carboxylates of the general formula Cp2Ti(O2CR)2 viz., [Ti(η5-C5H5)2(O2CC6H5-4-CH3)2] (1), [Ti(η5-C5H5)2(O2CC4H3-2-O)2] (2), [Ti(η5-C5H5)2(O2CC4H3-3-O)2] (3), [Ti(η5-C5H5)2(O2CC(CH3)3)2] (4), and [Ti(η5-C5H5)2(O2C(CH)C(CH3)3)2] (5) have been synthesized. All the titanocene(IV) carboxylates have been characterized by IR, 1H, and 13C NMR spectroscopic techniques, and the crystal and molecular structures of 1–5 have been determined by single crystal X-ray crystallography. The structures present similar features with monodentate carboxylate ligands and tetrahedral Ti centers, assuming that each cyclopentadienyl (Cp) ring occupies one position only. The differences in the structures relate primarily to the relative orientations of the carboxylate ligands. In the molecular packing, non-conventional Cp-C–H···O(carbonyl) hydrogen bonds are observed in each case and lead to supramolecular chains in each of 1, 4, and 5. In 2, the 2-furyl-O atoms also participate in C–H···O interactions leading to a two-dimensional array. Finally, in 3, a two-dimensional array arises as a result of Cp-C–H···O(carbonyl) and 3-furyl-C–H···O(carbonyl) interactions. As representative example, 3 was used as starting material for the synthesis of TiO2 nanoparticles (NPs). An effective and simple wet-chemical method involving calcination and ultrasonication is suggested for obtaining pure anatase TiO2 NPs, which were confirmed from the powder XRD and imaging techniques such as SEM, TEM, and EDS.
Information content capabilities of very high resolution optical space imagery for updating GIS database
Creators: name: Alkan, Mehmet
name: Jacobsen, Karsten
Publisher: name: Bellingham, WA : S P I E - International Society for Optical Engineering
Year: 2015
Subjects: subject: GIS
subject: Information Content
subject: Mapping
subject: Maps
subject: Optical resolving power
subject: Remote sensing
subject: Ground resolution
subject: Ground sampling distances
subject: High resolution imagery
subject: Information contents
subject: Optical satellites
subject: Topographic map
subject: Topographic mapping
subject: Very high resolution
subject: Geographic information systems
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Nowadays, the number and capacity of very high resolution optical satellites grows permanently, so the access to very high resolution space images is not any more a problem. The use of Geographic Information Systems (GISs) together with Remote Sensing became important. With the increased ground resolution a competition to aerial images exist. For the generation of topographic maps, today available as GIS, the accuracy and the information content - what elements can be identified in the image - are important. Both may limit the presentation scale of topographic maps. As horizontal accuracy 0.25mm up to 0.3mm in the map scale are accepted. The required information content is more complicate. The object details to be presented in topographic maps vary from area to area which is based on the planned and unplanned areas. In this study, images from IRS-1C, Kompsat-1, SPOT 5, OrbView-3, IKONOS, QuickBird and WorldView-1 have been used for topographic mapping. For this reason, Zonguldak test fields are an important area for applications of the high resolution imageries. The details which can be identified in the space images dominantly depends upon the ground resolution, available as ground sampling distance (GSD). In this study, high resolution imageries have been tested depending on the GSD and corresponding to the map scales for updating GIS database. © 2015 SPIE.
Critical moisture conditions for fungal decay of modified wood by basidiomycetes as detected by pile tests
Creators: name: Meyer, Linda
name: Brischke, Christian
name: Treu, Andreas
name: Larsson-Brelid, Pia
Publisher: name: Berlin : De Gruyter
Year: 2016
Subjects: subject: acetylated wood
subject: critical moisture content
subject: decay resistance
subject: furfurylated wood
subject: mass loss
subject: moisture content
subject: moisture performance
subject: pile test
subject: thermally modified wood
subject: wood degradation by basidiomycetes
subject: Forestry
subject: Fungi
subject: Moisture
subject: Moisture determination
subject: Piles
subject: Wood
subject: Acetylated wood
subject: Critical moisture content
subject: Decay resistance
subject: Mass loss
subject: Moisture performance
subject: Pile tests
subject: Thermally modified wood
subject: Wood degradation
subject: Decay (organic)
subject: Acetylation
subject: Pinus Sylvestris
subject: Dewey Decimal Classification::600 | Technik::630 | Landwirtschaft, Veterinärmedizin
subject: Dewey Decimal Classification::600 | Technik::670 | Industrielle und handwerkliche Fertigung

description: The aim of cell wall modification is to keep wood moisture content (MC) below favorable conditions for decay organisms. However, thermally modified, furfurylated, and acetylated woods partly show higher MCs than untreated wood in outdoor exposure. The open question is to which extent decay is influenced by the presence of liquid water in cell lumens. The present paper contributes to this topic and reports on physiological threshold values for wood decay fungi with respect to modified wood. In total, 4200 specimens made from acetylated, furfurylated, and thermally modified beech wood (Fagus sylvatica L.) and Scots pine sapwood (sW) (Pinus sylvestris L.) were exposed to Coniophora puteana and Trametes versicolor. Piles consisting of 50 small specimens were incubated above malt agar in Erlenmeyer flasks for 16 weeks. In general, pile upward mass loss (ML) and MC decreased. Threshold values for fungal growth and decay (ML≥2%) were determined. In summary, the minimum MC for fungal decay was slightly below fiber saturation point of the majority of the untreated and differently modified materials. Surprisingly, T. versicolor was able to degrade untreated beech wood at a minimum of 15% MC, and growth was possible at 13% MC. By contrast, untreated pine sW was not decayed by C. puteana at less than 29% MC. © 2016 by De Gruyter 2016.
Dust shell model of the water fountain source IRAS 16342--3814
Creators: name: Murakawa, K.
name: Izumiura, H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the circumstellar dust shell of the water fountain source IRAS 16342-3814. We performed two-dimensional radiative transfer modeling of the dust shell, taking into account previously observed spectral energy distributions (SEDs) and our new $J$-band imaging and $H$- and $K_S$-band imaging polarimetry obtained using the VLT/NACO instrument. Previous observations expect an optically thick torus in the equatorial plane because of a striking bipolar appearance and a large viewing angle of 30 - 40$\degr$. However, models with such a torus as well as a bipolar lobe and an AGB shell cannot fit the SED and the images simultaneously. We find that an additional optically and geometrically thick disk located inside a massive torus solves this problem. The masses of the disk and the torus are estimated to be 0.01 $M_{\sun}$ at the $a_\mathrm{max}=100 μ$m dust and 1 $M_{\sun}$ at $a_\mathrm{max}=10 μ$m dust, respectively. We discuss a possible formation scenario for the disk and torus based on a similar mechanism to the equatorial back flow. IRAS 16342-3814 is expected to undergo mass loss at a high rate. The radiation from the central star is shielded by the dust that was ejected in the subsequent mass loss event. As a result, the radiation pressure on dust particles cannot govern the motion of the particles anymore. The mass loss flow can be concentrated in the equatorial plane by help of an interaction, which might be the gravitational attraction by the companion, if it exists in IRAS 16342-3814. A fraction of the ejecta is captured in a circum-companion or circum-binary disk and the remains are escaping from the central star(s) and form the massive torus.
description: 8 pages, 6 figures
A phenylpropanoid dimer from the leaves of Piper betle
Creators: name: Atiya, Akhtar
name: Majrashi, Taghreed A.
name: Begum, M. Yasmin
name: Lal, Uma R.
name: Sinha, Barij N.
name: Qadira, Shaik Fayazuddin Abdul
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology
subject: 60506 Virology

description: Phytochemical analyses of the chloroform extract of Piper betle L. var. Sanchi, Piperaceae, leaves led to the isolation of a new phenylpropanoid analogue for the first time: hydroxychavicol dimer, 2-(γ'-hydroxychavicol)-hydroxychavicol (S1), on the basis of spectroscopic data 1 D (1H and 13C) and 2 D (1H–1H COSY and HMBC) NMR, as well as ESI-MS, FT-IR, HR-ESI-MS and LC-ESI-MS. Compound S1 exhibited excellent antioxidant DPPH radical scavenging activity with IC50 values of 9.07 μg/mL, compared to ascorbic acid as a standard antioxidant drug with IC50 value of 3.41 μg/mL. Evaluation of cytotoxic activity against two human colon cancer cell lines (HT 29 and COLO-205) showed significant effect with GI50 values of 73.81 and 64.02 μmol/L, compared to Doxorubicin® as a standard cytotoxic drug with GI50 value of <10 μmol/L.
Percolation thresholds on 3-dimensional lattices with 3 nearest neighbors
Creators: name: Tran, Jonathan
name: Yoo, Ted
name: Stahlheber, Shane
name: Small, Alex
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We present a study of site and bond percolation on periodic lattices with 3 nearest neighbors per site. We have considered 3 lattices, with different symmetries, different underlying Bravais lattices, and different degrees of longer-range connections. As expected, we find that the site and bond percolation thresholds in all of the 3-connected lattices studied here are significantly higher than in diamond. Interestingly, thresholds for different lattices are similar to within a few percent, despite the differences between the lattices at scales beyond nearest and next-nearest neighbors.
description: 8 pages, 8 figures
Iron(III) chloride and its coordination chemistry
Creators: name: Cotton, Simon A.
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 111714 Mental Health
subject: FOS: Health sciences

description: The coordination chemistry of FeCl3 is distinctly different to that of the other 3d metal halides. It has a distinct preference for O-donor ligands. Although it primarily forms six-coordinate complexes, it has some distinctive features that set it apart from metals like Mn(II), Co(II), and Ni(II), such as the self-ionized complexes [FeL4Cl2]+ [FeCl4]−. There are a number of examples where very small changes in the coordination sphere tilt the balance between isomeric structures. Chloride has a significant steric effect in the coordination sphere as well as a greater trans-influence than water.
On the complete integrability of a nonlinear oscillator from group theoretical perspective
Creators: name: Bhuvaneswari, A.
name: Chandrasekar, V. K.
name: Senthilvelan, M.
name: Lakshmanan, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: In this paper, we investigate the integrability aspects of a physically important nonlinear oscillator which lacks sufficient number of Lie point symmetries but can be integrated by quadrature. We explore the hidden symmetry, construct a second integral and derive the general solution of this oscillator by employing the recently introduced $λ$-symmetry approach and thereby establish the complete integrability of this nonlinear oscillator equation from a group theoretical perspective.
description: 15 pages
The Pulsar Population in Globular Clusters and in the Galaxy
Creators: name: Freire, Paulo C. C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this paper, I review some of the basic properties of the pulsar population in globular clusters (GCs) and compare it with the the Galactic disk population. The neutron stars (NSs) in GCs were likely formed - and appear to continue forming - in highly symmetric supernovae (SNe), likely from accretion-induced collapse (AIC). I review the many pulsar finds and discuss some particularly well populated GCs and why they are so. I then discuss some particularly interesting objects, like millisecond pulsars (MSPs) with eccentric orbits, which were heavily perturbed by passing stars. Some of these systems, like NGC 1851A and NGC 6544B, are almost certainly the result of exchange interactions, i.e., they are witnesses to the very same processes that created the large population of MSPs in the first place. I also review briefly the problem posed by the presence of young pulsars in GCs (with a special emphasis on a sub-class of young pulsars, the super-energetic MSPs), which suggest continuing formation of NSs in low-velocity SNe. In the final section, I discuss the possibility of an analogous population in the Galaxy and highlight a particularly interesting case, PSR J1903+0327, where the primary neutron star appears to have formed with a small-velocity kick and small fractional mass loss. Systems with primary NSs formed in electron-capture SNe should constitute a distinct low-velocity Galactic population akin in many respects to the GC population. Current high-resolution surveys of the Galactic plane should be able to detect it clearly.
description: Proceedings of IAUS 291 "Neutron Stars and Pulsars: Challenges and Opportunities after 80 years", J. van Leeuwen (ed.); 8 pages, Accepted version
Linking accretion flow and particle acceleration in jets. I. New relativistic magnetohydrodynamical jet solutions including gravity
Creators: name: Polko, Peter
name: Meier, David L.
name: Markoff, Sera
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a new, approximate method for modelling the acceleration and collimation of relativistic jets in the presence of gravity. This method is self-similar throughout the computational domain where gravitational effects are negligible and, where significant, self-similar within a flux tube. These solutions are applicable to jets launched from a small region (e.g., near the inner edge of an accretion disk). As implied by earlier work, the flow can converge onto the rotation axis, potentially creating a collimation shock. In this first version of the method, we derive the gravitational contribution to the relativistic equations by analogy with non-relativistic flow. This approach captures the relativistic kinetic gravitational mass of the flowing plasma, but not that due to internal thermal and magnetic energies. A more sophisticated treatment, derived from the basic general relativistic magnetohydrodynamical equations, is currently being developed. Here we present an initial exploration of parameter space, describing the effects the model parameters have on flow solutions and the location of the collimation shock. These results provide the groundwork for new, semi-analytic models of relativistic jets which can constrain conditions near the black hole by fitting the jet break seen increasingly in X-ray binaries.
description: 13 pages, 7 figures, accepted for publication in MNRAS
Anthraquinones with potential antiproliferative activities from the fruits of Morinda citrifolia
Creators: name: Shen, Zhang-Yang
name: Zhao, Ying-Ying
name: Qiao, Ze-Hua
name: Xie, Zhen
name: Guan, Ruo-Qing
name: Liu, Ze-Yu
name: Liu, Yan-Ping
name: Chen, Guang-Ying
name: Fu, Yan-Hui
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biochemistry
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer

description: The phytochemical investigation on the fruits of Morinda citrifolia led to the isolation and characterization of a new anthraquinone, moricitrifone (1), along with seven known anthraquinones (2–8). The chemical structure of 1 was elucidated by extensive spectral analyses. The known compounds (2–8) were identified by comparing their spectral data with those reported in the literature. The antiproliferative activities of all isolated anthraquinones (1–8) against five human cancer cell lines: HL-60, SMMC-7721, A-549, MCF-7 and SW480 were evaluated in vitro. Compounds 1–8 exhibited remarkable antiproliferative activities with IC50 values ranging from 0.26 ± 0.05 to 16.58 ± 0.18 μM, which were comparable to those of doxorubicin.
A simple micromechanical model for pseudoelastic behavior of CuZnAl alloy
Creators: name: Levitas, V.I.
name: Idesman, A.V.
name: Stein, E.
name: Spielfeld, J.
name: Hornbogen, E.
Publisher: name: London : SAGE Publications Ltd.
Year: 1998
Subjects: subject: Composite micromechanics
subject: Mathematical models
subject: Phase transitions
subject: Stress analysis
subject: Thermoelasticity
subject: Three-phase materials
subject: Copper alloys
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: A simple micromechanical model for thermoelastic martensitic phase transitions (PT) is developed. It is deduced from the local description of PT in transforming particles with subsequent usage of average procedure, based on a model for elastic three-phase materials (austenite, martensite and new infinitesimal nucleus) under assumption of homogeneity of stresses in each phase. In contrast to known approaches, a new local PT criterion and a corresponding extremum principle for PT with dissipation are used. The macroscopic PT criterion obtained is split into two different equations for description of temperature-induced PT and stress-induced PT. To identify the material parameters of the model and to check its validity, simple one-dimensional experiments were carried out for CuZnAl alloy. The experimental values of martensite start and finish temperatures and austenite finish temperature for temperature-induced PT and the stress-strain diagram for stress-induced direct PT at any fixed temperature have allowed to determine six material parameters of the model for the simplest one-dimensional case. Then model prediction is compared with other independent tests. A good agreement is obtained of the calculated stress-strain curves for reverse PT (martensite-austenite) at θ,1 = 20°C and for direct PT at temperature range of 30-80°C with experimental data. Finally, the formula for determination of the transformation heat during temperature-induced PT for the given model is derived. It is shown that the predicted transformation heat is close to the experimental one. © 1999 Technomic Publishing: Co., Inc.