bluuebunny/crossref_metadata_2025_split huggingface dataset:
Nonlinear Control Method for Nonlinear Systems with Unknown Perturbations by Combining Left and Right Factorization
Authors: Tao Fazhan , Deng Mingcong 
Published: December 2017

AbstractIn this paper, nonlinear control design scheme for a class of nonlinear systems is proposed based on operator coprime factorization theory. In detail, two stable controllers are provided to design a Bezout identity by combining left factorization (not coprime) with right factorization. Based on the proposed design method, a realization approach to left coprime factorization for the nonlinear system is obtained, which provides an effective framework for constructing left coprime factorization. Meanwhile, internal‐output stability of the nonlinear system is guaranteed. After that, based on the obtained left coprime factorization, the cases of the nonlinear systems with perturbations are discussed for guaranteeing robust stability for the perturbed systems. For the perturbations, two different cases, known bounded perturbations and unknown bounded perturbations, are investigated from different viewpoints to analyze robust stability issue for the perturbed systems. Finally, a simulation example is given to confirm the effectiveness of the proposed design method.
Time‐Varying Stabilizers for Stochastic Systems with no Unforced Dynamics
Authors: Florchinger Patrick 
Published: December 2017

AbstractThis paper is concerned with the stabilizability of nonlinear stochastic systems with no unforced dynamics. Sufficient conditions allowing to design explicitly time–varying feedback laws which render such systems asymptotically stable in probability are given. The techniques used in this work involve the stochastic Lyapunov analysis combined with the stochastic version of the La Salle invariance principle. The interest of our results is that the systems considered in the present paper cannot in general be stabilized via time‐invariant feedback laws.
Application of aqueous two‐phase micellar system to improve extraction of adenoviral particles from cell lysate
Authors: Molino João Vitor Dutra , Lopes André Moreni , Viana Marques Daniela de Araújo , Mazzola Priscila Gava , da Silva Joas Lucas , Hirata Mario Hiroyuki , Hirata Rosário Dominguez Crespo , Gatti Maria Silvia Viccari , Pessoa Adalberto 
Published: December 2017

AbstractViral vectors are important in medical approaches, such as disease prevention and gene therapy, and their production depends on efficient prepurification steps. In the present study, an aqueous two‐phase micellar system (ATPMS) was evaluated to extract human adenovirus type 5 particles from a cell lysate. Adenovirus was cultured in human embryonic kidney 293 (HEK‐293) cells to a concentration of 1.4 × 1010 particles/mL. Cells were lysed, and the system formed by direct addition of Triton X‐114 in a 23 full factorial design with center points. The systems were formed with Triton X‐114 at a final concentration of 1.0, 6.0, and 11.0% (w/w), cell lysate pH of 6.0, 6.5, and 7.0, and incubation temperatures at 33, 35, and 37 °C. Adenovirus particles recovered from partition phases were measured by qPCR. The best system condition was with 11.0% (w/w) of Triton X‐114, a cell lysate pH of 7.0, and an incubation temperature at 33 °C, yielding 3.51 × 1010 adenovirus particles/mL, which increased the initial adenovirus particles concentration by 2.3‐fold, purifying it by 2.2‐fold from the cell lysate, and removing cell debris. In conclusion, these results demonstrated that the use of an aqueous two‐phase micellar system in the early steps of downstream processing could improve viral particle extraction from cultured cells while integrating clarification, concentration, and prepurification steps.
Ein Fundament für Hamburgs Sterne
Authors: Nagel Werner , Bosbach Marc Oliver 
Published: December 2017

AbstractDas Planetarium Hamburg wurde im Frühjahr 2017 nach ca. 18 Monaten Bauzeit wieder eröffnet. In diesem Zeitraum fanden umfassende Umbau‐ und Anbaumaßnahmen statt. Zielsetzung der Planung war eine umfassende Modernisierung inklusive Schaffung neuer Flächen und Nutzungsmöglichkeiten. Das war besonders aus Gründen des Denkmalschutzes herausfordernd, da das Planetarium in einem historischen ehemaligen Wasserturm in Hamburgs Stadtpark beheimatet ist. Abbruch‐ und Umbauarbeiten, Abfangungen tragender, denkmalgeschützter Bauteile mit höchsten Anforderungen an die Gebrauchstauglichkeit und Anbaumaßnahmen unter der Bedingung, die Optik des Wasserturms zu erhalten, waren unter anderem Bestandteil der Planungsaufgaben. Diese beschäftigten gleichermaßen Objektplaner, Tragwerksplaner und die beteiligten Baufirmen. Das Ergebnis kann sich sehen lassen und erhält nicht nur vom Bauherren und den Planungsbeteiligten, sondern auch von den Besuchern einhellig positive Resonanz.
Targeting cancer stem cells and signaling pathways by resveratrol and pterostilbene
Authors: Zhang Lingling , Wen Xiang , Li Mengmeng , Li Shiming , Zhao Hui 
Published: December 2017

AbstractIn past decades, increasing evidence regarding cancer stem cells (CSCs) may account for carcinogenesis, tumor drug‐resistant, and metastasis. CSCs are even considered as the root causes of tumor recurrence and metastases. Targeting CSCs may provide a new clue to cure cancer. Epidemiological and clinical studies have suggested that intake of dietary natural products may bring health benefits including lowering risk of cancer incidence. In this review, we have particularly focused on targeting signaling pathways of CSCs by natural resveratrol and its dimethylated derivative pterostilbene. © 2017 BioFactors, 44(1):61–68, 2018
Maximizing neotissue growth kinetics in a perfusion bioreactor: An in silico strategy using model reduction and Bayesian optimization
Authors: Mehrian Mohammad , Guyot Yann , Papantoniou Ioannis , Olofsson Simon , Sonnaert Maarten , Misener Ruth , Geris Liesbet 
Published: December 2017

AbstractIn regenerative medicine, computer models describing bioreactor processes can assist in designing optimal process conditions leading to robust and economically viable products. In this study, we started from a (3D) mechanistic model describing the growth of neotissue, comprised of cells, and extracellular matrix, in a perfusion bioreactor set‐up influenced by the scaffold geometry, flow‐induced shear stress, and a number of metabolic factors. Subsequently, we applied model reduction by reformulating the problem from a set of partial differential equations into a set of ordinary differential equations. Comparing the reduced model results to the mechanistic model results and to dedicated experimental results assesses the reduction step quality. The obtained homogenized model is 105 fold faster than the 3D version, allowing the application of rigorous optimization techniques. Bayesian optimization was applied to find the medium refreshment regime in terms of frequency and percentage of medium replaced that would maximize neotissue growth kinetics during 21 days of culture. The simulation results indicated that maximum neotissue growth will occur for a high frequency and medium replacement percentage, a finding that is corroborated by reports in the literature. This study demonstrates an in silico strategy for bioprocess optimization paying particular attention to the reduction of the associated computational cost.
Growth modeling of the green microalga Scenedesmus obliquus in a hybrid photobioreactor as a practical tool to understand both physical and biochemical phenomena in play during algae cultivation
Authors: Tramontin Deise P. , Gressler Pablo D. , Rörig Leonardo R. , Derner Roberto B. , Pereira‐Filho Jurandir , Radetski Claudemir M. , Quadri Marintho B. 
Published: December 2017

AbstractIn recent years, numerous studies have justified the use of microalgae as a sustainable alternative for the generation of different types of fuels, food supplementation, and cosmetics, as well as bioremediation processes. To improve the cost/benefit ratio of microalgae mass production, many culture systems have been built and upgraded. Mathematical modeling the growth of different species in different systems has become an efficient and practical tool to understand both physical and biochemical phenomena in play during algae cultivation. In addition, growth modeling can guide design changes that lead to process optimization. In the present work, growth of the green microalga Scenedesmus obliquus was modeled in a hybrid photobioreactor that combines the characteristics of tubular photobioreactors (TPB) with thin‐layer cascades (TLC). The system showed productivity greater than 8.0 g m−2 day−1 (dry mass) for CO2‐fed cultures, and the model proved to be an accurate representation of experimental data with R2 greater than 0.7 for all cases under variable conditions of temperature and irradiance to determine subsystem efficiency. Growth modeling also allowed growth prediction relative to the operating conditions of TLC, making it useful for estimating the system given other irradiance and temperature conditions, as well as other microalgae species.
Gender and mental health: An examination of procedural justice in a specialized court context
Authors: Somers Logan J. , Holtfreter Kristy 
Published: December 2017

AbstractThe procedural justice framework has been applied in the criminal justice contexts of policing, corrections, and courts. According to this perspective, fair treatment, respectful dialogue and being given a proper voice will contribute to citizens' positive views of authority figures. While this literature has grown immensely, several questions remain unanswered. Do males and females perceive similar levels of procedural justice? Does mental health status influence perceptions of fair treatment? Whether procedural justice is a general perspective that can be applied across social groupings has important implications for correctional treatment in that programs that truly “work” for all are more cost‐effective. Toward that end, the current study investigates the relationships among procedural justice perceptions, gender, and mental health status in specialized drug courts, a context that has received little empirical attention. We do so using secondary data originally collected between 2003 and 2009 for Rossman, Roman, Zweig, Rempel and Lindquist's Multisite Adult Drug Court Evaluation (MADCE). Results from a full‐sample analysis reveal that women report higher levels of procedural justice; that drug court participation significantly influences procedural justice perceptions; and that depressive symptomology is a significant predictor of procedural justice perceptions. In male‐ and female‐specific subsamples, drug court participation exerts similar effects for males and females, as does depressive symptomology. Implications for theory, research, and practice are discussed.
Leukemic phase and CSF involvement of diffuse large B‐cell lymphoma with a complex karyotype including a TP53 deletion
Authors: Sinkoff Jillian , Olteanu Horatiu , Peterson Jess F. , Shah Nirav N. 
Published: December 2017

Key Clinical MessageDiffuse large B‐cell lymphoma in rare instances can present initially in a leukemic phase and mimic other lymphoid diseases. In such cases, advanced diagnostic testing including immunophenotyping, FISH analysis, and karyotyping can help determine the accurate diagnosis which is key in the management of the disease.
Nonhealing scrotal ulceration—an unusual manifestation of TB epididymo‐orchitis: case report and review of literature
Authors: Jayarajah Umesh , Gnanaselvam Pamathy , Sivaganesh Sivasuriya 
Published: December 2017

Key Clinical MessageThe clinical presentation of genitourinary tuberculosis (TB) may be variable and a high index of suspicion is required for a timely diagnosis, especially in endemic areas. Recurrent scrotal ulcers associated with epididymo‐orchitis even without other constitutional symptoms should alert the clinician of a possible diagnosis of TB.
Direct Synthesis of Hydrogen and Dimethoxylmethane from Methanol on Copper/Silica Catalysts with Optimal Cu+/Cu0 Sites
Authors: Wu Liubi , Li Bolong , Zhao Chen 
Published: December 2017

AbstractHydrogen is an important sustainable resource, and here we report a catalytic route for the direct production of hydrogen (with a purity of 95 %) and dimethoxylmethane (DMM) from supercritical methanol over a Cu/SiO2 catalyst prepared by deposition–precipitation with ammonia (DPA) at 240°C in a one‐pot process. The procedure starts with methanol dehydrogenation to hydrogen and formaldehyde at the interface of the Cu2O⋅SiO2–Cu0 particle mixture, and subsequently, the formaldehyde intermediate condenses with substantial methanol to form DMM in the liquid phase. The Cu0, CuO, and chrysocolla species are inactive for hydrogen generation from methanol, and the intrinsic active species for methanol decomposition is the Cu2O⋅SiO2–Cu0 nanoparticle interface, which is produced from the hydrogen reduction of Cu2Si2O5(OH)2 or from the methanol reduction of Cu−O−Si moieties. A correlation between the structure and activity on reduced Cu/SiO2 (DPA) suggested that only Cu0 was not active, but the combined Cu0 and Cu+ sites with interfaces on SiO2 with an optimal Cu+/Cu0 ratio of 1.56 were highly active for methanol dehydrogenation and subsequent condensation steps. The developed new catalytic system offers a facile and atom‐economical way to generate pure hydrogen (almost CO free) from liquid methanol that can be used in fuel cell and hydrogen‐involved biomass reactions.
Rapid Syndiospecific (Co)Polymerization of Fluorostyrene with High Monomer Conversion
Authors: Wang Zichuan , Wang Meiyan , Liu Jingyao , Liu Dongtao , Cui Dongmei 
Published: December 2017

AbstractFluoromonomers are difficult to polymerize through a coordination mechanism owing to the strong chelation between fluorine and catalysts and the electron‐deficient double‐bond. We report herein the unprecedented polymerization of para‐fluorostyrene (pFS) with excellent activity (1.12×107 g molLn−1h−1), distinguished syndioselectivity (rrrr >99 %) and high conversion (98.4 %) using rare‐earth‐metal catalysts bearing a pyridyl methylene fluorenyl ligand. DFT calculations reveal polar fluorine loses overwhelming coordination priority to the active central metal ion due to the sterically bulky and electron‐donating CGC‐ligand, thus its power of poisoning the active species is dramatically weakened. Based on this, copolymerization of pFS and styrene (St) has been successfully achieved with high activity and controllable pFS insertion. Conversely, the unlinked half‐sandwich rare‐earth‐metal system shows relatively lower activity, because both the transition‐states and intermediates incorporate a μ1‐F chelated pFS.
A Luminescent Dinuclear EuIII/TbIII Complex with LMCT Band as a Single‐Molecular Thermosensor
Authors: Yanagisawa Kei , Kitagawa Yuichi , Nakanishi Takayuki , Seki Tomohiro , Fushimi Koji , Ito Hajime , Hasegawa Yasuchika 
Published: December 2017

AbstractTemperature‐dependent luminescence of a dinuclear EuIII/TbIII complex with a seven‐coordinate structure is demonstrated. The dinuclear complex is composed of two lanthanide ions, six tetramethylheptanedionate ligands, and a bidentate phosphine oxide linker ligand. The dinuclear structure of the complex was characterized by single‐crystal XRD. Intrinsic 4f–4f emission quantum yields of the dinuclear EuIII and TbIII complexes were 66 and 61 %, respectively. The luminescence color of the dinuclear EuIII/TbIII complex changed from red to green with increasing temperature. The thermosensing range based on the ratio of luminescence intensity (AEu/ATb) was 100–450 K. The temperature‐dependent luminescence is due to the presence of a ligand‐to‐metal charge‐transfer state.
Co‐Structure‐Directing Effect in Ionothermal Synthesis of Extra‐Large‐Pore Aluminophosphate Zeotype with −CLO Topology
Authors: Lin Yutong , Zhang Ling , Guo Ke , Wang Miao , Wei Ying 
Published: December 2017

AbstractThe ionothermal synthesis of extra‐large‐pore aluminophosphate zeotype with −CLO topological structure, DNL‐1, was studied by using 1,6‐hexanediamine and several quaternary ammonium compounds with different types of cations and anions as co‐structure‐directing agents (co‐SDAs). The phase selectivity and crystallization process were investigated, and results showed that the crystallization of the −CLO and LTA structures correlated with the alkalinity and concentration, rather than with the structure of the co‐SDA. By combining solid/solution 13C NMR spectroscopy and other characterizations on DNL‐1 obtained with different co‐SDAs, it was demonstrated that the ionic‐liquid cation was unalterably occluded in the structure, whereas occlusion of the co‐SDA cation was not imperative. A plausible crystallization pathway was accordingly deduced, in which alkaline co‐SDA, which acted as an acidity regulator in the ionothermal system, could facilitate the formation of the double‐four‐ring (d4r) unit (Al4P4O20), and influence their subsequent assembly mode around ionic‐liquid cations, and thus, direct the crystallization of −CLO and LTA structures at different concentrations of co‐SDA.
Superconducting Hydrogen Sulfide
Authors: Yao Yansun , Tse John S. 
Published: December 2017

AbstractThe recent discovery of superconductivity above 200 K in hydrogen sulfide under high pressure marks a milestone in superconductor research. Not only does its critical temperature Tc exceed the previous record in cuprates by more than 50 K, the superconductivity in hydrogen sulfide also exhibits convincing evidence that it is of conventional phonon‐mediated type. Moreover, this is the first time that a previously unknown high‐Tc superconductor is predicted by theory and afterwards verified by experiment. In this Minireview, we survey the progress made in the last three years in understanding this novel material, and discuss unsolved problems and possible developments to encourage future investigations.
Synthesis of Functionalized Nitriles by Microwave‐Promoted Fragmentations of Cyclic Iminyl Radicals
Authors: Jackman Mary M. , Im Siyeon , Bohman Seth R. , Lo Concordia C. L. , Garrity Amanda L. , Castle Steven L. 
Published: December 2017

AbstractThe synthesis of functionalized nitriles via microwave‐promoted radical fragmentations of cyclic O‐phenyl oxime ethers is reported. A variety of radical traps can be employed, permitting the generation of diverse adducts via C−O, C−C, C−N, or C−X bond formation. Other salient features include a simple and practical protocol, very short reaction times, and the avoidance of metal catalysts and toxic cyanide reagents. The utility of this method is demonstrated by the ring‐distortion of a steroid‐derived substrate.
Laboratory investigation of oil viscosity effect during carbonated water injection: Comparison of secondary and tertiary recovery
Authors: Shokri Afra Mohammad Javad , Bahaloo Horeh Mohsen , Rostami Behzad , Norouzi Hamidreza 
Published: December 2017

AbstractAlthough the effect of viscosity on oil recovery is well established, no systematic investigation has been implemented regarding the effect of oil viscosity changes on performance of carbonated water injection (CWI). In this study, the performance of CWI with different oil viscosities and rock wettability was investigated through two main series of high‐pressure core flooding experiments on both clean and aged sand. The results obtained demonstrate that the capability of carbonated water to enhance oil recovery for both secondary and tertiary flooding is significantly greater versus that for water flooding. The creation of a low resistance flow channel and low oil recovery in water flooding is compensated for by CO2 diffusion and subsequent viscosity reduction and oil swelling in heavy and light oils. The results of the aged sand experiments showed that changing the wettability towards mixed wet caused ultimate reduction in oil recovery in each experiment, compared to the similar one in clean sand. However, it was observed that the amount of oil recovered after breakthrough compared to that in clean sand was increased, which showed the capacity of CW for enhanced oil recovery through alteration of wettability.
A review of the physicochemical properties and flotation of pyrrhotite superstructures (4C – Fe7S8/ 5C – Fe9S10) in Ni‐Cu sulphide mineral processing
Authors: Multani Ravinder S. , Waters Kristian E. 
Published: December 2017

AbstractPyrrhotite is one of the most abundant sulphide gangue minerals in base metal mining operations. It has little economic value and is a significant contributor of SO2 emissions at the smelting stage, thus it is rejected in most concentrators, requiring a concerted effort to ensure it is well separated from valuable minerals. The mineral processing of pyrrhotite is generally understood, however it has many complex crystallographic structures (superstructures) that behave differently in the flotation pulp for which the information is sparse and dispersed throughout the literature. Traditionally, the superstructures were largely isolated into magnetic/non–magnetic circuits and floated separately. Many operations have now transitioned away from magnetic separators, and treat the superstructures in the same flotation circuit where their flotation responses are quite different. Historically, it was perceived that the superstructures behaved virtually the same; whereas, recent work has clearly demonstrated that there are quantifiable differences in their flotation responses. The available information is scattered in the literature and is also plagued with many contradictions, making it very difficult for researchers to retrieve relevant information pertaining to the superstructures. This review aims to reduce the confusion by summarizing the superstructure nomenclature, characterization methods, aqueous stability, surface charges and superstructure‐reagent interactions, and available flotation data.
Azophenine as Central Core for Efficient Light Harvesting Devices
Authors: Lei Hu , Karsenti Paul‐Ludovic , Harvey Pierre D. 
Published: December 2017

AbstractThe notoriously non‐luminescent uncycled azophenine (Q) was harnessed with Bodipy and zinc(II)porphyrin antennas to probe its fluorescence properties, its ability to act as a singlet excited state energy acceptor and to mediate the transfer. Two near‐IR emissions are depicted from time‐resolved fluorescence spectroscopy, which are most likely due to the presence of tautomers of very similar calculated total energies (350 cm−1; DFT; B3LYP). The rates for energy transfer, kET(S1), for 1Bodipy*→Q are in the order of 1010–1011 s−1 and are surprisingly fast when considering the low absorptivity properties of the lowest energy charge transfer excited state of azophenine. The rational is provided by the calculated frontier molecular orbitals (MOs) which show atomic contributions in the C6H4C≡CC6H4 arms, thus favoring the double electron exchange mechanism. In the mixed‐antenna Bodipy–porphyrin star molecule, the rate for 1Bodipy*→porphyrin has also been evaluated (≈16×1010 s−1) and is among the fastest rates reported for Bodipy–zinc(II)porphyrin pairs. This astonishing result is again explained from the atomic contributions of the C6H4C≡CC6H4 and C≡CC6H4 arms thus favouring the Dexter process. Here, for the first time, this process is found to be sensitively temperature‐dependent. The azophenine turns out to be excellent for electronic communication.