bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation of DNA–Protein Cross‐Link Formation between Lysozyme and Oxanine by Mass Spectrometry
Authors: Chen Hauh‐Jyun Candy , Chiu Wei‐Loong , Lin Wen‐Peng , Yang Siou‐Siou 
Published: March 2008

AbstractReactive nitrogen species are implicated in inflammatory diseases and cancers. Oxanine (Oxa) is a DNA lesion product originating from the guanine base through exposure to nitric oxide, nitrous acid, or N‐nitrosoindoles. Oxanine was found to mediate formation of DNA–protein cross‐links (DPCs) in the cell extract. We have previously characterized two DNA–protein cross‐links from the reaction between Oxa and glutathione: namely, the thioester and the amide. In this study, lysozyme was used to study site‐specific modification on protein by Oxa moieties in DNA. With the aid of nanoLC coupled with nanospray ionization tandem mass spectrometry, addition of Oxa was found at Lys13, Lys97, Lys116, Ser85, and Ser86 of lysozyme when it was treated with 2′‐deoxyoxanosine (dOxo). Furthermore, incubation of lysozyme with Oxa‐containing calf thymus DNA, produced by treating DNA with nitrous acid, led to lysozyme modification at Lys116, Ser85, and Ser86. Interestingly, none of the cysteine residues was modified by dOxo, in contrast with our previous findings that dOxo reacted with oxidized glutathione disulfide, forming the thioester. This might be due to the half‐life of the dOxo‐derived thioester being 2.2 days at the pH of incubation. Furthermore, the sites of modifications on lysozyme are in good agreement with the solvent accessibility of the residues. Since repair of Oxa‐derived DPCs has not been extensively investigated, these results suggest that these stable DPCs might represent important forms of cellular damage caused by reactive nitrogen species involved in inflammationrelated diseases.
Characterization of HPLC columns for two‐dimensional LC × LC separations of phenolic acids and flavonoids
Authors: Jandera Pavel , Vyňuchalová Kateřina , Hájek Tomáš , Česla Petr , Vohralík Gregor 
Published: March 2008

AbstractThe aim of the work is to contribute to rational selection of columns and mobile phases for ‘orthogonal’ two‐dimensional LC × LC operation of specific sample types, providing maximum increase in the peak capacity with respect to single‐dimension HPLC. As a criterion of suitability, the dissimilarity of the separation selectivity of the phase separation systems was selected. For this purpose, correlations between the retention and molecular structure descriptors were used to characterize and compare the columns with respect to various types of selective interactions using the interaction indices as the general polarity scale characteristics and the linear free energy relationships (LFER) model employing selective molecular structural descriptors. Chemometric methods—cluster analysis using similarity dendrograms and multiple regression analysis—were used to classify several types of bonded C18, amide and polyethyleneglycol columns on the basis of differences in separation selectivities for selected phenolic and flavone standards. Systematic development of a comprehensive LC × LC method for two‐dimensional separation of phenolic acids and flavone natural antioxidants was based on the selection of the combination of first‐ and second‐dimension columns with low correlation of retention of representative standards providing a highly orthogonal two‐dimensional separation system. The mobile phases providing best separation selectivity for phenolic compounds on each column tested were optimized using window‐diagram optimization strategy. The final optimized conditions were employed for comprehensive LC × LC separations of natural antioxidants using a polyethylene glycol microcolumn in the first dimension and a short monolithic C18 column in the second dimension. Copyright © 2008 John Wiley & Sons, Ltd.
Hyperspectral imaging combined with principal component analysis for bruise damage detection on white mushrooms (Agaricus bisporus)
Authors: Gowen A. A. , O'Donnell C. P. , Taghizadeh M. , Cullen P. J. , Frias J. M. , Downey G. 
Published: March 2008

AbstractHyperspectral imaging (HSI) combines conventional imaging and spectroscopy to simultaneously acquire both spatial and spectral information from an object. This technology has recently emerged as a powerful process analytical tool for rapid, non‐contact and non‐destructive food analysis. In this study, the potential application of HSI for damage detection on the caps of white mushrooms (Agaricus bisporus) was investigated. Mushrooms were damaged by controlled vibration to simulate damage caused by transportation. Hyperspectral images were obtained using a pushbroom line‐scanning HSI instrument, operating in the wavelength range of 400–1000 nm with spectroscopic resolution of 5 nm. The effective resolution of the CCD detector was 580 × 580 pixels by 12 bits. Two data reduction methods were investigated: in the first, principal component analysis (PCA) was applied to the hypercube of each sample, and the second PC (PC 2) scores image was used for identification of bruise‐damaged regions on the mushroom surface; in the second method PCA was applied to a dataset comprising of average spectra from regions normal and bruise‐damaged tissue. In this case it was observed that normal and bruised tissue were separable along the resultant first principal component (PC 1) axis. Multiplying the PC 1 eigenvector by the hypercube data allowed reduction of the hypercube to a 2‐D image, which showed maximal contrast between normal and bruise‐damaged tissue. The second method performed better than the first when applied to a set of independent mushroom samples. The results from this study could be used for the development of a non‐destructive monitoring system for rapid detection of damaged mushrooms on the processing line. Copyright © 2008 John Wiley & Sons, Ltd.
Nonlinear modelling of data in photomineralization kinetics of organic micropollutants by photocatalytic membranes immobilizing titanium dioxide in membrane reactors
Authors: Bellobono Ignazio Renato , Bianchi Riccardo , de Martini Giulia , Tozzi Paola Maria , Bonardi Mauro Luigi , Groppi Flavia , Rossi Mauro 
Published: March 2008

AbstractKinetic fitting of substrate disappearance and of total organic carbon (TOC) mineralization of organic micropollutants, in water and air, by photocatalytic membranes immobilizing titanium dioxide, was carried out. A model was used in which mineralization of substrate to CO2 is supposed to occur, with kinetic constant k1, through one single intermediate, mediating the behaviour of all the numerous real intermediates formed in the path to CO2, kinetic constant of formation of the latter being k2. A competitive Langmuirian‐type adsorption of both substrate and ‘intermediate’ was also supposed to be operative, as expressed by pseudo‐thermodynamic constants K1 and K2 respectively, these constants possessing a, partly at least, kinetic significance. Nonlinear models could be fitted to data by using the least‐squares method. The very satisfactory matching is shown for the laboratory‐scale mineralization kinetics of methane, as model molecule of aliphatic contaminants, both in the gas phase and in aqueous solution. Furthermore, in pilot plant experiments, using phenol, as model molecule of aromatics, modelling of quantum yields was carried out, as a function of concentration and of adsorbed radiant power. Kinetics of hydroxyl radicals reacting between themselves, leading to hydrogen peroxide, other than with substrate or intermediates leading to mineralization, was considered, paralleled by a second competition kinetics due to superoxide anion radical and its conjugate acid, equally leading to mineralization. In this model the contribution of hydroxyl radicals to mineralization decreases with irradiance, while the contribution of superoxide anion radical and its conjugate acid increases. If the regression equations of these two contributions are considered together, in a linear combination, the surface model perfectly fits the experimental data. Copyright © 2008 John Wiley & Sons, Ltd.
Frequency‐Dependent Alternating‐Current Scanning Electrochemical Microscopy (4D AC‐SECM) for Local Visualisation of Corrosion Sites
Authors: Eckhard Kathrin , Erichsen Thomas , Stratmann Martin , Schuhmann Wolfgang 
Published: March 2008

AbstractFor a better understanding of the initiation of localised corrosion, there is a need for analytical tools that are capable of imaging corrosion pits and precursor sites with high spatial resolution and sensitivity. The lateral electrochemical contrast in alternating‐current scanning electrochemical microscopy (AC‐SECM) has been found to be highly dependent on the frequency of the applied alternating voltage. In order to be able to obtain data with optimum contrast and high resolution, the AC frequency is swept in a full spectrum at each point in space instead of performing spatially resolved measurements at one fixed perturbation frequency. In doing so, four‐dimensional data sets are acquired (4D AC‐SECM). Here, we describe the instrument set‐up and modus operandi, along with the first results from the imaging of corroding surfaces. Corrosion precursor sites and local defects in protective organic coatings, as well as an actively corroding pit on 304 stainless steel, have been successfully visualised. Since the lateral electrochemical contrast in these images varies with the perturbation frequency, the proposed approach constitutes an indispensable tool for obtaining optimum electrochemical contrast.
Acid–Base Bifunctional Catalysis of Silica–Alumina‐Supported Organic Amines for Carbon–Carbon Bond‐Forming Reactions
Authors: Motokura Ken , Tomita Mitsuru , Tada Mizuki , Iwasawa Yasuhiro 
Published: March 2008

AbstractAcid–base bifunctional heterogeneous catalysts were prepared by the reaction of an acidic silica–alumina (SA) surface with silane‐coupling reagents possessing amino functional groups. The obtained SA‐supported amines (SA–NR2) were characterized by solid‐state 13C and 29Si NMR spectroscopy, FT‐IR spectroscopy, and elemental analysis. The solid‐state NMR spectra revealed that the amines were immobilized by acid–base interactions at the SA surface. The interactions between the surface acidic sites and the immobilized basic amines were weaker than the interactions between the SA and free amines. The catalytic performances of the SA–NR2 catalysts for various carbon–carbon bond‐forming reactions, such as cyano‐ethoxycarbonylation, the Michael reaction, and the nitro‐aldol reaction, were investigated and compared with those of homogeneous and other heterogeneous catalysts. The SA–NR2 catalysts showed much higher catalytic activities for the carbon–carbon bond‐forming reactions than heterogeneous amine catalysts using other supports, such as SiO2 and Al2O3. On the other hand, homogeneous amines hardly promoted these reactions under similar reaction conditions, and the catalytic behavior of SA–NR2 was also different from that of MgO, which was employed as a typical heterogeneous base. An acid–base dual‐activation mechanism for the carbon–carbon bond‐forming reactions is proposed.
ChemInform Abstract: Emergent Reduction of Electronic State Dimensionality in Dense Ordered Li—Be Alloys.
Authors: Feng Ji , Hennig Richard G. , Ashcroft N. W. , Hoffmann Roald 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Crystal Structures, Optoelectronic Properties, and Electronic Structures of Layered Oxychalcogenides MCuOCh (M: Bi, La; Ch: S, Se, Te): Effects of Electronic Configurations of M3+ Ions.
Authors: Hiramatsu Hidenori , Yanagi Hiroshi , Kamiya Toshio , Ueda Kazushige , Hirano Masahiro , Hosono Hideo 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Combination of Lacunary Polyoxometalates and High‐Nuclear Transition‐Metal Clusters under Hydrothermal Conditions. Part 2. From Double Cluster, Dimer, and Tetramer to Three‐Dimensional Frameworks.
Authors: Zhao Jun‐Wei , Jia Hong‐Peng , Zhang Jie , Zheng Shou‐Tian , Yang Guo‐Yu 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Hydrothermal Synthesis of Single‐Crystal Szaibelyite MgBO2(OH) Nanobelt as a New Host Material for Red‐Emitting Rare‐Earth Ions.
Authors: Liu Jinping , Li Yuanyuan , Huang Xintang , Li Zikun , Li Guangyun , Zeng Haibo 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Ba2Mn2O4Cu0.9S: A Layered Oxysulfide with a New Perovskite‐Related Manganese Oxide Fragment.
Authors: Hyett Geoffrey , Gal Zoltan A. , Smura Catherine F. , Clarke Simon J. 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Highly Swollen Layered Nickel Oxide with a Trilayer Hydrate Structure.
Authors: Yang Xiaojing , Takada Kazunori , Itose Masayuki , Ebina Yasuo , Ma Renzhi , Fukuda Katsutoshi , Sasaki Takayoshi 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Novel Photoinduced Reduction of Conjugate Dienes by the Combination of Benzenethiol and Diphenyl Diselenide.
Authors: Mitamura Takenori , Imanishi Yoshiaki , Nomoto Akihiro , Sonoda Motohiro , Ogawa Akiya 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Hypohalogenation of Vinyl‐ and Allylacetylenes and Some Chemical Transformations of the Products.
Authors: Veliev M. G. , Sadygov O. A. , Alimardanov Kh. M. , Shatirova M. I. 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Iron‐Catalyzed Nucleophilic Substitution of Allylic Acetate.
Authors: Aakermark Bjoern , Sjoegren Magnus P. T. 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Efficient and General One‐Pot Synthesis of Diaryliodonium Triflates: Optimization, Scope and Limitations.
Authors: Bielawski Marcin , Zhu Mingzhao , Olofsson Berit 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Diastereodivergent Synthesis of Enantiomerically Pure Homoallylic Amine Derivatives Containing Quaternary Carbon Stereocenters.
Authors: Kolodney Goren , Sklute Genia , Perrone Sylvie , Knochel Paul , Marek Ilan 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Aerobic Oxidation under Visible Light Irradiation of a Fluorescent Lamp with a Combination of Carbon Tetrabromide and Triphenyl Phosphine.
Authors: Sugai Taichi , Itoh Akichika 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Asymmetric Tosylation of Racemic 2‐Hydroxyalkanamides with Chiral Copper Catalyst.
Authors: Onomura Osamu , Mitsuda Masaru , Nguyen My Thi Thuy , Demizu Yosuke 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: PdCl2, a Useful Catalyst for Protection of Alcohols as Diphenylmethyl (DPM) Ethers.
Authors: Bikard Yann , Weibel Jean‐Marc , Sirlin Claude , Dupuis Luc , Loeffler Jean‐Philippe , Pale Patrick 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Practical Synthesis of the Calcimimetic Agent, Cinacalcet.
Authors: Thiel Oliver R. , Bernard Charles , Tormos Wanda , Brewin Alan , Hirotani Shuji , Murakami Kazuo , Saito Kenji , Larsen Robert D. , Martinelli Michael J. , Reider Paul J. 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Chiral 3‐Substituted Indanones via an Enantioselective Reductive Heck Reaction.
Authors: Minatti Ana , Zheng Xiaolai , Buchwald Stephen L. 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Highly Regio‐ and Stereoselective [2 + 3] Cycloadditions of Azomethine Ylides to [70]Fullerene.
Authors: Troshin Pavel A. , Peregudov Alexander S. , Peregudova Svetlana M. , Lyubovskaya Rimma N. 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Palladium‐Catalyzed Double Annulations to Construct Multisubstituted Benzodifurans.
Authors: Liang Zhiqiang , Ma Shengming , Yu Jihong , Xu Ruren 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Facile Non‐Oxidative Method for Synthesizing 1,3‐Disubstituted Pyrroles from Pyrrolidine and Aldehydes.
Authors: Oda Mitsunori , Fukuchi Yosuke , Ito Satoshi , Nguyen Chung Thanh , Kuroda Shigeyasu 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Conjugate Addition of Indoles to α,β‐Unsaturated Ketones (Chalcones) Catalyzed by KHSO4 under Ultrasonic Conditions.
Authors: Zeng Xiao‐Fei , Ji Shun‐Jun , Shen Shu‐Su 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Ditopic Ligands Containing Bis(1H‐pyrazol‐1‐yl)methane Fragments.
Authors: Nudnova E. A. , Potapov A. S. , Khlebnikov A. I. , Ogorodnikov V. D. 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Novel Spiro Imidazolium Salts as Chiral Ionic Liquids.
Authors: Patil Mahesh L. , Rao C. V. Laxman , Takizawa Shinobu , Takenaka Kazuhiro , Onitsuka Kiyotaka , Sasai Hiroaki 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Palladium Pincer Complex Catalyzed Condensation of Sulfonimines and Isocyanoacetate to Imidazoline Derivatives. Dependence of the Stereoselectivity on the Ligand Effects.
Authors: Aydin Juhanes , Kumar K. Senthil , Eriksson Lars , Szabo Kalman J. 
Published: March 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.