bluuebunny/crossref_metadata_2025_split huggingface dataset:
Two‐Controller Anti‐Windup Design for Enlarging Domain of Stability of Actuator Constrained State‐Delay Systems
Authors: Ahmed Abrar , Khan M. Umer , Rehan Muhammad , Iqbal Naeem 
Published: March 2013

AbstractThis paper proposes the enlargement of domain of stability of an actuator constrained state time‐delay system with a novel dynamic two controller anti‐windup design. The design makes a departure from the conventional controller‐modeled actuator saturation‐plant topology to a controller‐modeled actuator saturation‐controller‐plant topology. Using linear matrix inequality‐based convex optimization, anti‐windup gains for two separate controllers are computed through delay independent and delay dependant Lyapunov–Krasovskii functionals, ensuring closed‐loop asymptotic stability. Consequently, the domain of stability of the new topology is comparatively ascertained and proved to be more enlarged. An application based motor control system validates the devised control law.
Spectrofluorometric analytical applications of cyclodextrins
Authors: Elbashir Abdalla A. , Dsugi Nuha Fathi Ali , Mohmed Tamador Omer Mohamoud , Aboul‐Enein Hassan Y. 
Published: March 2013

ABSTRACTCyclodextrins (CDs) are a family of cyclic oligosaccharides composed of α‐(1,4)‐linked glucopyranose subunits. The most important feature of CDs is their ability to form inclusion complexes (host–guest complexes) with a very wide range of solid, liquid and gaseous compounds by a molecular complexation. During the last decade, a considerable number of research papers has been focused on the use of CDs to enhance fluorescence intensity of different analytes and to develop CD‐induced spectrofluorimetric method. In this review, the various spectrofluorimetric methods based on host–inclusion complex are presented. Copyright © 2013 John Wiley & Sons, Ltd.
Synthesis of Pt/C Catalysts through Reductive Deposition: Ways of Tuning Catalytic Properties
Authors: Kaprielova Ksenia M. , Ovchinnikov Igor I. , Yakovina Olga A. , Lisitsyn Alexander S. 
Published: March 2013

AbstractCharacteristic features of Pt/C catalysts prepared through reductive deposition from an aqueous solution have been investigated. The carbon support was found to act as an effective nucleating agent and to ensure the formation of small and predominantly nonaggregated Pt particles, probably through a preliminary formation of oxide nuclei on the carbon surface. The deposition rates could be high enough to provide the location of Pt nanoparticles near the external surface of the support and outside micropores. The depositions onto bare carbon supports and Pt/C samples presynthesized by using another method proved equally effective, which thus opened a route to various types of metal distribution. With the same metal precursor, reductant, and base (H2PtCl6, NaOOCH, Na2CO3), catalytic properties could be influenced through the support, Pt loading, and deposition conditions. In the oxidation of isopropyl alcohol as a model test reaction, alcohol conversion could be as high as 99.7 % and turnover frequencies 80 000 h−1 [H2O, O2, 1 bar (100 kPa), 30 °C].
ChemInform Abstract: Synthesis, Band and Crystal Structures, and Optical Properties of the Ternary Compound Mg2Te3O8.
Authors: Lin Wan‐Feng , Xing Qiu‐Ju , Ma Jun , Zou Jian‐Ping , Lei Si‐Liang , Luo Xu‐Biao , Guo Guo‐Cong 
Published: March 2013

AbstractThe new title compound is hydrothermally prepared from a mixture of MgO, TeO2, and H2O (autoclave, 220 °C, 3 d) and characterized by single crystal XRD, UV and IR spectroscopy, and DFT band structure calculations.
ChemInform Abstract: Reaction with Oleum under Harsh Conditions: Characterization of the Unique [M(S2O7)3]2‐ Ions (M: Si, Ge, Sn) in A2[M(S2O7)3] (A: NH4, Ag).
Authors: Logemann Christian , Gunzelmann Daniel , Kluener Thorsten , Senker Juergen , Wickleder Mathias S. 
Published: March 2013

AbstractThe title compounds are synthesized by reactions of MCl4 (M: Si, Ge, Sn) and A2SO4 (A: NH4, Ag) with oleum (65% SO3; sealed glass tube, 250 °C, 24 h).
ChemInform Abstract: Formation of Chiral Fluoroalkyl Products Through Copper‐Free Enantioselective Allylic Alkylation Catalyzed by an NHC Ligand.
Authors: Grassi David , Li Hailing , Alexakis Alexandre 
Published: March 2013

AbstractAn asymmetric allylic alkylation reaction is used for the synthesis of fluorinated alkenes bearing a quaternary stereocenter.
ChemInform Abstract: Asymmetric Bis(alkoxycarbonylation) Reaction of Cyclic Olefins Catalyzed by Palladium in the Presence of Copper(I) Triflate.
Authors: Aratani Takahiro , Tahara Kenji , Takeuchi Susumu , Kitamura Satoko , Murai Moemi , Fujinami Shuhei , Inomata Katsuhiko , Ukaji Yutaka 
Published: March 2013

AbstractA variety of optically active cis‐dicarboxylates (VI) and (VIII) is obtained by palladium‐catalyzed bis(alkoxycarbonylation) of corresponding alkenes in the presence of a chiral bisoxazoline ligand.
ChemInform Abstract: Allenoate‐Derived 1,5‐, 1,7‐, and 1,9‐Zwitterions as Highly Versatile Coupling‐Partners for Phosphine‐Triggered Cycloaddition Reactions.
Authors: Meng Wei , Zhao Hai‐Tao , Nie Jing , Zheng Yan , Fu Aiping , Ma Jun‐An 
Published: March 2013

AbstractTreatment of ethyl allenoate (I) with tris(diethylamino)phosphine leads to a mixture of cycloheptadiene (II) and bicyclic product (III).
ChemInform Abstract: Regiochemistry of Mitsunobu Alkylations of Hydrazine Derivatives.
Authors: Dunford Damian G. , Chaudhry Faryal , Kariuki Benson , Knight David W. , Wheeler Robert C. 
Published: March 2013

AbstractUnsymmetrical hydrazines are coupled in a regiospecific manner at the carbonyl‐substituted nitrogen with primary and secondary alcohols bearing various functionalities.
ChemInform Abstract: One‐Pot Consecutive Reactions Based on the Synthesis of Conjugated Enones by the Re‐Catalyzed Meyer—Schuster Rearrangement.
Authors: Mattia Elio , Porta Alessio , Merlini Valentina , Zanoni Giuseppe , Vidari Giovanni 
Published: March 2013

AbstractThis is an unprecedented, atom‐economical one‐pot procedure for olefination of carbonyl compounds.
ChemInform Abstract: Preparation of Copper(II) Oxide Bound on Polystyrene Beads and Its Application in the Aryl Aminations: Synthesis of Imatinib.
Authors: Heo Yumi , Hyun Dajung , Kumar Manian Rajesh , Jung Hyun Min , Lee Sunwoo 
Published: March 2013

AbstractA broad spectrum of aryl and hetaryl bromides is suitable for amination in the presence of the title catalyst.
ChemInform Abstract: Synthesis and Application of Novel Dithiane Alcohol Ligand Based on Chiral Cyclopropane‐Backbone for Asymmetric Ethylation of Aromatic Aldehydes.
Authors: Na Risong , Wang Bo , Liu Honglei , Bian Qinghua , Zhong Jiangchun , Wang Min , Guo Hongchao 
Published: March 2013

AbstractAromatic and cinnamyl aldehydes are alkylated with high yields and enantioselectivities while aliphatic aldehydes provide poor results (not shown).
ChemInform Abstract: Cinchona Alkaloids Induce Asymmetry in the Insertion Reaction of Thermally Generated Carbenes into N—H Bonds.
Authors: Saito Hiroaki , Morita Daisuke , Uchiyama Taketo , Miyake Muneharu , Miyairi Shinichi 
Published: March 2013

AbstractAmong some derivatives tested, best results are obtained with dihydrocinchonine as a moderately efficient catalyst to produce phenylglycines.
ChemInform Abstract: Synthesis and in vitro Antimycobacterial and Isocitrate Lyase Inhibition Properties of Novel 2‐Methoxy‐2′‐hydroxybenzanilides, Their Thioxo Analogues and Benzoxazoles.
Authors: Kozic Jan , Novotna Eva , Volkova Marie , Stolarikova Jirina , Trejtnar Frantisek , Wsol Vladimir , Vinsova Jarmila 
Published: March 2013

AbstractAll newly synthesized compounds are evaluated for their in vitro antimycobacterial activities as well as for their isocitrate lyase (ICL) inhibition properties.
ChemInform Abstract: Rhodium‐Catalyzed Ring Opening of Benzocyclobutenols with Site‐Selectivity Complementary to Thermal Ring Opening.
Authors: Ishida Naoki , Sawano Shota , Masuda Yusuke , Murakami Masahiro 
Published: March 2013

AbstractA Rh‐catalyzed ring opening reaction, showing a site‐selectivity contrasting that of the corresponding thermal process, leads to the development of a novel alkyne insertion reaction providing dihydronaphthalene derivatives.
ChemInform Abstract: Reusable Visible Light Photoredox Catalysts; Catalyzed Benzylic C(sp3)—H Functionalization/Carbocyclization Reactions.
Authors: Xia Jia‐Dong , Deng Guo‐Bo , Zhou Ming‐Bo , Liu Wei , Xie Peng , Li Jin‐Heng 
Published: March 2013

AbstractThis mild and general route enables the construction of functionalized 1H‐indenes utilizing a visible light photoredox catalysis strategy.
ChemInform Abstract: Silver(I)‐Catalyzed Tandem Reactions of N‐Activated Aziridine‐Propargylic Esters to Pyrrolidin‐3‐one Derivatives.
Authors: Yang Jin‐Ming , Zhang Zhen , Wei Yin , Shi Min 
Published: March 2013

AbstractTreatment of N‐activated substrates under optimized conditions A) results in formation of pyrrolidin‐3‐one derivatives through an unexpected rare 5‐exo‐tet cyclization.
ChemInform Abstract: Efficient, One‐Pot, BF3·OEt2‐Mediated Synthesis of Substituted N‐Aryl Lactams.
Authors: Chaturvedi Devdutt , Chaturvedi Amit K. , Mishra Nisha , Mishra Virendra 
Published: March 2013

AbstractThe reaction of arenes (II) with the ω‐azido alkanoic acid chlorides (I), (IV), and (VI) is carried out in the presence of a Lewis acid under mild conditions to afford the corresponding N‐aryl lactams in good to high yields and short reaction times.
ChemInform Abstract: Synthesis of Azocino[5,4‐]indoles via Gold‐Catalyzed Intramolecular Alkyne Hydroboration.
Authors: Peshkov Vsevolod A. , Pereshivko Olga P. , Van der Eycken Erik V. 
Published: March 2013

AbstractThe AuCl(PPh3)/AgOTf catalyst system efficiently replaces the previously published Hg(OTf)2 catalyst.
ChemInform Abstract: Synthesis of Cyclic N‐Tosyliminocarbonates by Lewis Acid Catalyzed Allylic Substitution of Trichloroacetimidates.
Authors: Grigorjeva Liene , Jirgensons Aigars 
Published: March 2013

AbstractThe intramolecular Lewis acid catalyzed allylic substitution of the imidate group in N‐tosylcarbamates gives N‐tosyliminocarbonates with high trans‐selectivity as major products.
ChemInform Abstract: Ultrasound‐Promoted Regioselective Synthesis of 1‐Aryl‐5‐amino‐1H‐tetrazoles.
Authors: Habibi Davood , Nasrollahzadeh Mahmoud , Sahebekhtiari Hesam , Sajadi S. Mohammad 
Published: March 2013

AbstractThe efficient, simple procedure avoids hazardous agents such as HN3 and Br‐CN.
ChemInform Abstract: Enantioselective Synthesis of Highly Functionalized Phosphonate‐Substituted Pyrans or Dihydropyrans Through Asymmetric [4 + 2] Cycloaddition of β,γ‐Unsaturated α‐Ketophosphonates with Allenic Esters.
Authors: Pei Cheng‐Kui , Jiang Yu , Wei Yin , Shi Min 
Published: March 2013

AbstractThe regioselectivity of the reaction can be shifted significantly dependent on the cinchona ligand under either conditions A) or B).
ChemInform Abstract: Copper‐Catalyzed ortho‐Acylation of Phenols with Aryl Aldehydes and Its Application in One‐Step Preparation of Xanthones.
Authors: Hu Jun , Adogla Enoch A. , Ju Yong , Fan Daping , Wang Qian 
Published: March 2013

AbstractA series of benzophenones (V) is obtained by ortho‐acylation of phenols with aryl aldehydes.
ChemInform Abstract: Sulfenyl Halides in the Synthesis of Heterocycles. Part 4. Heterocyclization in Reactions of Alkenes with Sulfenylating Reagents Based on Di(2‐pyridyl) Disulfide.
Authors: Borisov A. V. , Matsulevich Zh. V. , Osmanov V. K. , Borisova G. N. , Mammadova G. Z. , Maharramov A. M. , Khrustalev V. N. 
Published: March 2013

AbstractAn efficient and convenient methodology for the formation of 2,3‐dihydro[1,3]thiazolo[3,2‐a]pyridinium derivatives is developed, which is based on the interaction of alkenes with sulfenylating reagents generated by the action of sulfuryl chloride or antimony pentachloride on di(2‐pyridyl)disulfide (I).
ChemInform Abstract: Synthesis and Evaluation of Anticonvulsant and Antidepressant Activities of 5‐Alkoxytetrazolo[1,5‐c]thieno[2,3‐e]pyrimidine Derivatives.
Authors: Wang Shi‐Ben , Deng Xian‐Qing , Zheng Yan , Yuan Yan‐Ping , Quan Zhe‐Shan , Guan Li‐Ping 
Published: March 2013

AbstractMost of the title compounds (VIII) (20 examples), especially derivative (VIIId), exhibit excellent antidepressant activity.
ChemInform Abstract: Highly Efficient Vinylaromatics Generation via Iron‐Catalyzed sp3 C—H Bond Functionalization CDC Reaction: A Novel Approach to Preparing Substituted Benzo[α]phenazines.
Authors: Lou Shao‐Jie , Xu Dan‐Qian , Shen Dan‐Feng , Wang Yi‐Feng , Liu Yun‐Kui , Xu Zhen‐Yuan 
Published: March 2013

AbstractVinylation of benzylic C—H bond is achieved using a wide range of heterocyclic compounds as quinoxalines, quinolines, pyrazines and pyridines and DMA as a carbon source.
ChemInform Abstract: One‐Pot Thiourea Formation—Palladium‐Catalyzed Cyclization Sequence to 3,4‐Dihydro‐2H‐1,3‐benzothiazine‐2‐imines from 2‐Halo N‐Methylbenzylamine — Scope and Limitations.
Authors: Lach Franck 
Published: March 2013

AbstractThe concise route to title compounds (III) and (V) is amenable to the introduction of both alkyl‐ and arylisothiocyanates.
ChemInform Abstract: Synthesis of 15‐, 16‐, and 17‐Membered Bis‐C‐Pivot Macrocycles Consisting of N2O2 Donor‐Type Crown Ethers and Dialkyl Phosphonates.
Authors: Kocak Selen Bilge , Ueckardes Hale 
Published: March 2013

AbstractThe phosphorylation of bis‐imino crown ethers, e.g. (I), is studied with a view to developing a new class of supramolecular hosts.
ChemInform Abstract: Palladium‐Catalyzed Tandem Reaction of o‐Aminophenols, Bromoalkynes and Isocyanides to Give 4‐Amine‐benzo[b][1,4]oxazepines
Authors: Liu Bifu , Li Yibiao , Yin Meizhou , Wu Wanqing , Jiang Huanfeng 
Published: March 2013

Abstract32 examples
ChemInform Abstract: Enantioselective Copper(I)‐Catalyzed Borylative Aldol Cyclizations of Enone Diones.
Authors: Burns Alan R. , Gonzalez Jorge Solana , Lam Hon Wai 
Published: March 2013

AbstractA three‐component catalyst combination is employed for the domino conjugate boration/aldol cyclization of enone diones to give densely functionalized decalin, hydroindan, and diquinane‐based compounds.
ChemInform Abstract: Electrodeposition of Crystalline and Photoactive Silicon Directly from Silicon Dioxide Nanoparticles in Molten CaCl2.
Authors: Cho Sung Ki , Fan Fu‐Ren F. , Bard Allen J. 
Published: March 2013

AbstractPure, polycrystalline, and photoactive silicon is directly obtained from SiO2 nanoparticles by electrodeposition in molten CaCl2 on a silver electrode (quartz tube, 850 °C).
ChemInform Abstract: Rhodium‐Catalyzed Acyloxy Migration of Propargylic Esters in Cycloadditions, Inspiration from the Recent “Gold Rush”
Authors: Shu Xing‐Zhong , Shu Dongxu , Schienebeck Casi M. , Tang Weiping 
Published: March 2013

AbstractReview: 69 refs.
Role of carrier flotation in accelerating bitumen extraction recovery from mineable athabasca oil sands
Authors: (Joe) Zhou Z.A. , Li Haihong , Chow Ross , Roberge Kelly 
Published: March 2013

AbstractOre blending is a strategy developed in the oil sands industry to enhance bitumen recovery from low grade oil sands ores. It involves blending low grade ores with high grade ores at a certain ratio, resulting in a higher overall bitumen recovery from the mixture than the simple recovery summation of the two extracted separately. To understand the underlying mechanisms, both bitumen‐coated glass beads (−150 + 125 µm) and raw coal particles (−500 + 300, −300 + 150 and −150 µm) were used as carrier materials in this study to simulate bitumen droplets from high grade ores. Experimental results revealed that coal particles were more efficient than hydrophobised bitumen‐coated glass beads in accelerating bitumen recovery and that better bitumen extraction performance was obtained by using smaller sizes of coal. This was attributed to the gravitational effect of larger, heavier particles on the detachment of bitumen‐particle aggregates from bubbles. For smaller sizes of coal (−150 µm), a faster bitumen flotation recovery was achieved with more coal added. An increase in bitumen recovery up to 20–30% (absolute) was obtained by adding coal into the oil sands slurry. The interaction of bitumen with coal particles or bitumen‐coated glass beads during oil sands slurry conditioning and flotation was visually verified from simple coagulation tests. The similarity of ore blending in oil sands extraction to carrier flotation in minerals flotation and the potential application of carrier flotation principles to oil sands extraction were discussed.
Experimental study on adsorption of a new surfactant onto carbonate reservoir samples—application to EOR
Authors: Zendehboudi Sohrab , Ahmadi Mohammad Ali , Rajabzadeh Amin Reza , Mahinpey Nader , Chatzis Ioannis 
Published: March 2013

AbstractSurfactant flooding aims at lowering the interfacial tensions between the oil and water phases to improve the displacement efficiency during oil recovery. However, surfactant losses due to adsorption on the reservoir rock impairs performance of the chemical flooding, consequently renders the process impractical economically. This article presents adsorption equilibrium and kinetics of Zizyphus Spina Christi (ZSC), a new non‐ionic surfactant, onto carbonate rocks. The adsorption tests were conducted at a temperature range of 28–75°C. A conductivity method was employed in this study to measure CMC parameter and surfactant concentration in the aqueous solutions. The equilibrium conditions for the crushed rock samples were obtained after about 2 days. According to the experimental results, the equilibrium data were well‐fitted by the Freundlich isotherm for carbonate samples. Furthermore, the adsorption process is exothermic and obeys the second‐order kinetic model. Such a systematic investigation is very helpful to select a proper surfactant for EOR application and reservoir stimulation in the petroleum industry.
Influence of Redox Mediators and Electron Donors on the Anaerobic Removal of Color and Chemical Oxygen Demand from Textile Effluent
Authors: Amorim Sandra M. , Kato Mario T. , Florencio Lourdinha , Gavazza Sávia 
Published: March 2013

AbstractColor removal was evaluated in anaerobic assays using synthetic (SE) and real (RE) effluents containing the dye Direct Black 22 (DB22). The focus was on the individual influence of two electron donors (EDs), sucrose and ethanol; and their combination with two redox mediators (RMs), lawsone and riboflavin. In addition to SE assays, the EDs were combined with sulfate which was present in the RE. Distinct behavior was observed with both assays. In the case of SE, using the EDs sucrose and ethanol resulted in DB22 removal efficiency of 93 and 83%, respectively; but only 27% in the control. The respective removal rates were 27.8‐ and 4.4‐fold higher than that of the control. Using the EDs with the RM lawsone resulted in color removal higher than that with riboflavin. Interestingly, in the ethanol + sulfate assay, late release of the last was observed, possibly due to the desulfonation reaction of the aromatic structures during the DB22 molecule breakdown. In the case of RE, no improvement was observed with either EDs; and some combinations with the RMs even resulted in decreased color removal. Therefore, the used EDs and RMs showed positive effect on color removal in SEs; but unexpectedly not in REs.
Anthropogenic extinction threats and future loss of evolutionary history in reef corals
Authors: Huang Danwei , Roy Kaustuv 
Published: March 2013

AbstractExtinction always results in loss of phylogenetic diversity (PD), but phylogenetically selective extinctions have long been thought to disproportionately reduce PD. Recent simulations show that tree shapes also play an important role in determining the magnitude of PD loss, potentially offsetting the effects of clustered extinctions. While patterns of PD loss under different extinction scenarios are becoming well characterized in model phylogenies, analyses of real clades that often have unbalanced tree shapes remain scarce, particularly for marine organisms. Here, we use a fossil‐calibrated phylogeny of all living scleractinian reef corals in conjunction with IUCN data on extinction vulnerabilities to quantify how loss of species in different threat categories will affect the PD of this group. Our analyses reveal that predicted PD loss in corals varies substantially among different threats, with extinctions due to bleaching and disease having the largest negative effects on PD. In general, more phylogenetically clustered extinctions lead to larger losses of PD in corals, but there are notable exceptions; extinction of rare corals from distantly‐related old and unique lineages can also result in substantial PD loss. Thus our results show that loss of PD in reef corals is dependent on both tree shape and the nature of extinction threats.
An improvement of incremental recursive fisher linear discriminant for online feature extraction
Authors: Ohta Ryohei , Ozawa Seiichi 
Published: March 2013

AbstractThis paper proposes a new online feature extraction method called the Incremental Recursive Fisher Linear Discriminant (IRFLD), whose batch learning algorithm, referred to as RFLD, was proposed by Xiang and colleagues. In the conventional Linear Discriminant Analysis (LDA), the number of discriminant vectors is limited to the number of classes minus one due to the rank of the between‐class covariance matrix. However, RFLD and the proposed IRFLD can break this limit; that is, an arbitrary number of discriminant vectors can be obtained. In the proposed IRFLD, the Incremental Linear Discriminant Analysis (ILDA) of Pang and colleagues is extended in such a way that effective discriminant vectors are recursively searched for in the complementary space of a conventional discriminant subspace. In addition, to estimate a suitable number of effective discriminant vectors, the classification accuracy is evaluated using the cross‐validation method in an online manner. For this purpose, validation data are obtained by performing k‐means clustering on incoming training data and the previous validation data. The performance of IRFLD is evaluated for 16 benchmark data sets. The experimental results show that the final classification accuracies of IRFLD are always better than those of ILDA. We also show that this performance improvement is attained by adding discriminant vectors in a complementary LDA subspace. © 2013 Wiley Periodicals, Inc. Electron Comm Jpn, 96(4): 29–40, 2013; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10430