bluuebunny/crossref_metadata_2025_split huggingface dataset:
Power variation of multiple fractional integrals
Authors: Tudor Constantin , Tudor Maria 
Published: February 2007

Abstract
We study the convergence in probability of the normalized q-variation of the multiple fractional multiparameter integral processes
$$\begin{gathered} \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{t} _r = (t_1 ,...,t_r ) \to I_r^H (f_r )_{\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{t} _r } : = \int_{[0,\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{t} _r ]} {f_r (s_1 ,...,s_r )dB_{s_1 }^H ...dB_{s_r }^H } , \hfill \\ \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{t} _r = (t_1 ,...,t_r ) \to I_r^{H, - } (f_r )_{\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{t} _r } : = \int_{[0,\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{t} _r ]} {f_r (s_1 ,...,s_r )dS_{s_1 }^H ...dS_{s_r }^H } , \hfill \\ \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{t} _2 = (t_1 ,t_2 ) \to I_r^H (g)_{\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{t} _2 } : = \int_{[0,\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{t} _2 ]} {g(s_1 ,s_2 )dB_{s_1 }^{H,1} dB_{s_2 }^{H,2} } , \hfill \\ \end{gathered} $$
where f
r, g are continuous deterministic functions, B
H (resp. S
H) is a fractional (resp. a sub-fractional) Brownian motion with Hurst parameter H > 1/2 and B
H,1, B
H,1 are independent fractional Brownian motions with Hurst parameter H.
On stable least squares solution to the system of linear inequalities
Authors: Übi Evald 
Published: February 2007

Abstract
The system of inequalities is transformed to the least squares problem on the positive ortant. This problem is solved using orthogonal transformations which are memorized as products. Author’s previous paper presented a method where at each step all the coefficients of the system were transformed. This paper describes a method applicable also to large matrices. Like in revised simplex method, in this method an auxiliary matrix is used for the computations. The algorithm is suitable for unstable and degenerate problems primarily.
Effect of homocysteine and nitric oxide levels on specific Computed Axial Tomography measurements in Alzheimer disease
Authors: Baiguera Silvia , Gallucci Maurizio , Zanardo Andrea , Folin Marcella 
Published: February 2007

Abstract
The present study was undertaken to examine the effect of Homocysteine (Hcy) and nitric oxide (NO) levels on specific Computed Axial Tomography (CAT) measurements, as global brain atrophy and brain vascular lesion in Alzheimer Disease (AD) and in Vascular Dementia (VD) patients. We have analysed serum Hcy and NO levels in AD patients and compared the findings with those in VD patients and control subjects. Moreover we have studied the correlation of Hcy and NO levels with cognitive impairment and brain atrophy determined by Computed Axial Tomography. Hcy serum levels significantly increased in all demented patients compared to control group, independently from the dementia type. On the contrary, no differences were observed in NO serum levels between groups. Moreover, we found significant correlation between Hcy and brain atrophy in both demented groups; whereas NO levels correlated only in AD, but not in VD patients. The pathogenic effect of Hcy either in AD and VD patients appears to confirm a definitive vascular component in AD. As regards NO, our results highlight the role of NO as a beneficial molecule in AD and support the use of NO mimetics as an antineurodegenerative therapy for AD patients.
Filtration model for suspensions that form filter cakes with creep behavior
Authors: Christensen Morten Lykkegaard , Keiding Kristian 
Published: February 2007

AbstractWaste‐activated sludge was filtered and the formed filter cake studied. It was shown that average specific filter‐cake resistance increases during filtration. A stress–relaxation experiment was performed and the two relaxation times found were of the same order of magnitude as the duration of the filtration stage. It was therefore concluded that the local solid volume fraction of sludge filter cakes changes not only with effective pressure but also with time. In contrast, it is usually assumed in filtration modeling that solid volume fraction is a unique function of effective pressure. A new filtration model was thus developed by adopting the concept of filter‐cake creep and applying it in conventional models. It was shown that the model developed, unlike conventional filtration models, satisfactorily describes the experimental data in the case of waste‐activated sludge. Furthermore, the model is capable of being scaled with respect to feed concentration and volume. © 2007 American Institute of Chemical Engineers AIChE J, 2007
Novel Ag+‐zeolite/polymer mixed matrix membranes with a high CO2/CH4 selectivity
Authors: Li Yi , Chung Tai‐Shung , Kulprathipanja Santi 
Published: February 2007

AbstractA novel silver ion‐exchange treatment of zeolite was introduced in this work to change the physical and chemical adsorption properties of penetrants in the zeolite. EDX data confirm the complete replacement of sodium ion in zeolite NaA by silver ion, whereas XRD patterns and BET results show no changes in some physical properties of zeolite after the silver ion‐exchange treatment. Polyethersulfone (PES)‐zeolite NaA mixed matrix membranes (MMMs) and PES–zeolite AgA MMMs were fabricated at high processing temperatures with different zeolite loadings. Cross‐sectional SEM images of these two types of MMMs indicate the interface between polymer and zeolite phases is comparable before and after the silver ion‐exchange treatment. The effects of silver ion‐exchange treatment of zeolite and zeolite loadings on the gas separation performance of these MMMs were investigated. CO2 permeability of PES–zeolite AgA MMMs is higher than that of PES–zeolite NaA MMMs, whereas their CH4 permeability is lower than that of PES–zeolite NaA MMMs. This trend is the result of the reversible reaction between silver ion and CO2 molecule. CO2 and CH4 permeability of PES–zeolite AgA MMMs decreases with increasing zeolite content arising from the effects of partial pore blockage of zeolite and polymer chain rigidification, whereas their CO2/CH4 selectivity increases with an increase in zeolite loadings and the highest value reaches 59.6 at 50 wt % zeolite loading because of a combined effect of the facilitated transport mechanism of silver ion and the molecular sieving mechanism of zeolite. Both CO2‐induced plasticization test and CO2/CH4 mixed gas measurement were performed to examine the applicability of these developed PES–zeolite AgA MMMs in industry. Results prove that this type of composite membrane material is a superior candidate for the practical separation of natural gas. © 2007 American Institute of Chemical Engineers AIChE J, 2007
Electrochemiluminescence determination of codeine or morphine with an organically modified silicate film immobilizing Ru(bpy)32+
Authors: Qiu Bin , Chen Xi , Chen Hai‐Ling , Chen Guo‐Nan 
Published: February 2007

AbstractAn ECL approach was developed for the determination of codeine or morphine based on tris(2,2′‐bipyridine)ruthenium(II) (Ru(bpy)32+) immobilized in organically modified silicates (ORMOSILs). Tetramethoxysilane (TMOS) and dimethyldimethoxysilane (DiMe‐DiMOS) were selected as co‐precursors for ORMOSILs, which were then immobilized on a surface of glassy carbon electrode (GCE) by a dip‐coating process. Ru(bpy)32+ was immobilized in the ORMOSIL film via ion‐association with poly(p‐styrenesulphonate). The ORMOSIL‐modified GCE presented good electrochemical and photochemical activities. In a flow system, the eluted codeine or morphine was oxidized on the modified GCE and reacted with immobilized Ru(bpy)32+ at a potential of +1.20 V (vs. Ag/AgCl). The modified electrode was used for the ECL determination of codeine or morphine and showed high sensitivity. The calibration curves were linear in the range 2 × 10−8–5 × 10−5 mol/L for codeine and 1 × 10−7–3 × 10−4 mol/L for morphine. The detection limit was 5 × 10−9 mol/L for codeine and 3 × 10−8 mol/L for morphine, at signal:noise ratio (S:N) = 3. Both codeine and morphine showed reproducibility with RSD values <2.5% at 1.0 × 10−6 mol/L. Furthermore, the modified electrode immobilized Ru(bpy)32+ was applied to the ECL determination of codeine or morphine in incitant samples. Copyright © 2007 John Wiley & Sons, Ltd.
Ant colony optimisation: a powerful tool for wavelength selection
Authors: Shamsipur Mojtaba , Zare‐Shahabadi Vali , Hemmateenejad Bahram , Akhond Morteza 
Published: February 2007

AbstractAnt colony optimisation (ACO) is a meta‐heuristic algorithm, which is derived from the observation of real ants. Real ant colonies are distributed system that, in spite of the simplicity of their individuals, present a highly structured social organisation and can accomplish complex tasks. They always find a short path between the nest and a food source. ACO is based on local message exchange via the deposition of pheromone trails. It is in fact a population‐based approach using positive feedback as well as greedy search. Wavelength selection is a strategy used for improving the quality of calibration methods. As a first report, this work indicated that the ACO possesses a great ability to find best subsets of wavelengths, at a short period of time with small PRESS values, via accumulation of information in the form of pheromone trails deposited on each wavelength. Theory of ACO is described and, to carry out the wavelength selection, a fitness function is defined. The ACO parameters are configured with a 3‐levels full factorial design. The high ability of ACO in wavelength selection process was demonstrated by examining four different NIR and UV/Vis data sets via various ACO algorithms, including ACO‐ILS, ACO‐CLS and ACO‐PLS. The results showed that, with the same fitness function, ACO‐ILS algorithm suffers from some overfitting problem. This problem was overcome by constraining the algorithm to choose limited number of wavelengths, the corresponding algorithm called as ACO‐ILS(limited). The results obtained by these algorithms clearly revealed the improved predictive ability of ACO in wavelength selection over the existing full‐spectrum models. Copyright © 2007 John Wiley & Sons, Ltd.
Statistical approach to metabonomic analysis of rat urine following surgical trauma
Authors: Ghosh Samiran , Hill Dennis W. , Petty Nathan M. , Melchert Russell B. , Luo Belinda , Grant David F. , Dey Dipak K. 
Published: February 2007

AbstractAcute trauma is often associated with the progressive deterioration of multiple organ systems in humans and is the leading cause of death in trauma care units. Previous studies have suggested that multiple organ failure is likely related to uncontrolled systemic inflammation. However the causal mechanisms remain unknown. Current methods of assessing trauma patient status and predicting outcome are based on a variety of anatomical and/or physiological scoring models. While being useful, these are labor intensive and do not allow for real‐time analysis of patient status. In this study, we have developed a metabonomic based approach using a rodent model of acute trauma in order to determine whether statistically significant differences exist between the quantitative and qualitative profile of urinary metabolites of control rats and rats that have experienced surgical trauma. This approach incorporates statistical, analytical, and computational tools in order to identify metabolites that are unique to trauma and maybe used to predict trauma outcome. Statistical analysis showed significant differences between the trauma and the control urinary metabonomes. Partial least square (PLS) and Principle component analysis (PCA) combined with Logistic regression (LR) were used to categorize subjects into either control or trauma with greater than 80% accuracy. We have also shown that using Bayesian methods that we could classify subjects being traumatic or control with a given credible interval. These results suggest that metabonomics may prove useful for quantifying and identifying biomarkers of trauma status as well as trauma outcome in humans. Copyright © 2007 John Wiley & Sons, Ltd.
A DFT Study on the Electronic and Redox Properties of [PW11O39(ReN)]n‐ (n = 3, 4, 5) and [PW11O39(OsN)]2‐.
Authors: Yan Li‐Kai , Dou Zhuo , Guan Wei , Shi Shao‐Qing , Su Zhong‐Min 
Published: February 2007

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, please click on HTML or PDF.
A Hollow Tetrahedral Cage of Hexadecagold Dianion Provides a Robust Backbone for a Tuneable Sub‐Nanometer Oxidation and Reduction Agent via Endohedral Doping.
Authors: Walter Michael , Haekkinen Hannu 
Published: February 2007

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, please click on HTML or PDF.
Local Environment of Yttrium in Y‐Doped Barium Cerate Compounds.
Authors: Longo Alessandro , Giannici Francesco , Balerna Antonella , Ingrao Carmela , Deganello Francesca , Martorana Antonino 
Published: February 2007

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, please click on HTML or PDF.
Single Crystal Investigation of Ce6Pd12In5.
Authors: Nesterenko S. N. , Tursina A. I. , Noel H. , Seropegin Y. D. 
Published: February 2007

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, please click on HTML or PDF.
Electrical Conductivity of Co—Zr Substituted Hexagonal Barium Ferrites
Authors: Venkateshwarlu Ch. , Ashok Ch. , Rao B. Appa , Ravinder D. , Boyanov B. S. 
Published: February 2007

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, please click on HTML or PDF.
Structural Ordering and Ferromagnetism in La4Mn4O11.
Authors: Ruiz‐Gonzalez M. L. , Cortes‐Gil R. , Alonso J. M. , Hernando A. , Vallet‐Regi M. , Gonzalez‐Calbet J. M. 
Published: February 2007

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, please click on HTML or PDF.
Phase Formation and Properties in the System Bi2O3:2CoO1+x:Nb2O5.
Authors: Vanderah Terrell A. , Siegrist Theo , Lufaso Michael W. , Yeager Margaret C. , Roth Robert S. , Nino Juan C. , Yates Samantha 
Published: February 2007

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, please click on HTML or PDF.
Amorphous Cobalt Oxysulfide as a Hydrogen Trap.
Authors: Loussot C. , Afanasiev P. , Vrinat M. , Jobic H. , Leverd P. C. 
Published: February 2007

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, please click on HTML or PDF.
Searched For and Found: Analogies Between Reduced Oxomolybdates and Cluster Compounds of Rare Earth Metals.
Authors: Kienle Lorenz , Mattausch Hansjuergen , Simon Arndt 
Published: February 2007

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, please click on HTML or PDF.
Er3O2F5: An Erbium Oxide Fluoride with Vernier‐Type Structure.
Authors: Mueller‐Bunz Helge , Janka Oliver , Schleid Thomas 
Published: February 2007

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, please click on HTML or PDF.
Synthesis and Structural Characterization of Sandwich‐Type Keggin‐γ‐Lacunary Silicotungstates with an Open Wells—Dawson‐Like Structure.
Authors: Liu Hongsheng , Peng Jun , Su Zhongnin , Chen Yanhui , Dong Baoxia , Tian Aixiang , Han Zhangang , Wang Enbo 
Published: February 2007

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, please click on HTML or PDF.
Synthesis and Characterization of Fluorous (S)‐ and (R)‐1‐Phenylethylamines that Effect Heat Facilitated Resolution of (.+‐.)‐2‐(8‐Carboxy‐1‐naphthylsulfinyl)benzoic Acid via Diasteromeric Salt Formation and Study of Their Circular Dichroism.
Authors: Szabo Denes , Nemes Aniko , Koevesdi Istvan , Farkas Viktor , Hollosi Miklos , Rabai Jozsef 
Published: February 2007

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, please click on HTML or PDF.
Highly Enantioselective α‐Aminoxylation of Aldehydes and Ketones in Ionic Liquids.
Authors: Huang Kun , Huang Zhi‐Zhen , Li Xin‐Liang 
Published: February 2007

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, please click on HTML or PDF.
o‐DPPB‐Directed Copper‐Mediated Allylic Substitution. Part 3. Stereospecific and Stereodivergent Construction of Tertiary and Quaternary Carbon Centers Through Switchable Directed/Nondirected Allylic Substitution.
Authors: Breit Bernhard , Demel Peter , Grauer Daniel , Studte Christopher 
Published: February 2007

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, please click on HTML or PDF.
The Ionic Liquid Ethyltri‐n‐butylphosphonium Tosylate as Solvent for the Acid‐Catalyzed Hetero‐Michael Reaction.
Authors: Karodia Nazira , Liu Xihan , Ludley Petra , Pletsas Dimitrios , Stevenson Grace 
Published: February 2007

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, please click on HTML or PDF.
Two‐Directional Anellation: Dual Benzyne Cycloadditions Starting from Bis(sulfonyloxy)diiodobenzene.
Authors: Hamura Toshiyuki , Arisawa Tetsu , Matsumoto Takashi , Suzuki Keisuke 
Published: February 2007

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, please click on HTML or PDF.
Radical Trifluoromethylation of Ketone Silyl Enol Ethers by Activation with Dialkylzinc.
Authors: Mikami Koichi , Tomita Yuichi , Ichikawa Yoshiyuki , Amikura Kazutoshi , Itoh Yoshimitsu 
Published: February 2007

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, please click on HTML or PDF.
Eco‐Friendly and Versatile Brominating Reagent Prepared from a Liquid Bromine Precursor.
Authors: Adimurthy Subbarayappa , Ramachandraiah Gadde , Bedekar Ashutosh V. , Ghosh Sudip , Ranu Brindaban C. , Ghosh Pushpito K. 
Published: February 2007

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, please click on HTML or PDF.
The Use of Organophotoacids for Deprotection Reactions in Organic Synthesis.
Authors: Nishikubo Yuichi , Kanzaki Shinya , Matsumura Shuichi , Toshima Kazunobu 
Published: February 2007

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, please click on HTML or PDF.
Investigation of Selective Monodeallylation of O,O′‐Diallylcatechols and 3‐Methylene‐1,5‐benzodioxepanes.
Authors: Hayashida Maiko , Ishizaki Miyuki , Hara Hiroshi 
Published: February 2007

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, please click on HTML or PDF.
Unusual Reactions of N‐(Trifluoromethylsulfonylimino)di‐ and ‐Trifluoromethanesulfinimidoyl Chlorides
Authors: Yagupol'skii L. M. , Bezdudnyi A. V. , Yagupol'skii Yu. L. 
Published: February 2007

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, please click on HTML or PDF.
Selective Oxidation of Sulfides to Sulfoxides Using a Silica‐Immobilized Vanadyl Alkyl Phosphonate Catalyst.
Authors: Al‐Hashimi Mohammed , Fisset Emilie , Sullivan Alice C. , Wilson John R. H. 
Published: February 2007

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, please click on HTML or PDF.
Broensted Acid TfOH‐Mediated Reactions of 2‐(Arylmethylene)cyclopropylcarbinols with Acetonitrile.
Authors: Shi Min , Tian Guo‐Qiang 
Published: February 2007

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, please click on HTML or PDF.
Synthesis of N,N,N′,N′‐Tetrasubstituted 1,3‐Bis(4‐aminophenyl)azulenes and Their Application to a Hole‐Injecting Material in Organic Electroluminescent Devices.
Authors: Ikai Masamichi , et al. et al. 
Published: February 2007

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, please click on HTML or PDF.
Ring‐Closing Olefin Metathesis for the Synthesis of Benzene Derivatives.
Authors: Yoshida Kazuhiro , Kawagoe Fumihiro , Iwadate Noriyuki , Takahashi Hidetoshi , Imamoto Tsuneo 
Published: February 2007

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, please click on HTML or PDF.
Catalytic Enantioselective Alkenylation and Phenylation of Trifluoromethyl Ketones.
Authors: Motoki Rie , Tomita Daisuke , Kanai Motomu , Shibasaki Masakatsu 
Published: February 2007

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, please click on HTML or PDF.
Reactions Using Lanthanum(III) Nitrate Hexahydrate. Part 5. Facile N‐tert‐Butoxycarbonylation of Amines Using La(NO3)3×6H2O as a Mild and Efficient Catalyst under Solvent‐Free Conditions.
Authors: Suryakiran N. , Prabhakar P. , Reddy T. Srikanth , Rajesh K. , Venkateswarlu Y. 
Published: February 2007

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, please click on HTML or PDF.
Mild and Efficient Deprotection of the Amine Protecting p‐Methoxyphenyl (PMP) Group.
Authors: Verkade Jorge M. M. , van Hemert Lieke J. C. , Quaedflieg Peter J. L. M. , Alsters Paul L. , van Delft Floris L. , Rutjes Floris P. J. T. 
Published: February 2007

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, please click on HTML or PDF.