bluuebunny/crossref_metadata_2025_split huggingface dataset:
Porphins and Their Derivatives. Part 24. meso‐Tetraphenylporphyrins with β‐Pyrazole Rings
Authors: Ishkov Yu. V. , Zhilina Z. I. , Mazepa A. V. , Vodzinskii S. V. , Bardai L. P. 
Published: December 2006

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.
New Pyrazoles by 1,3‐Dipolar Cycloaddition Reactions Between Sydnones and Activated Alkynes.
Authors: Dumitrascu Florea , Draghici Constantin , Vuluga Daniela , Caproiu Miron Teodor 
Published: December 2006

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 Fluorinated Indazoles Through ANRORC‐Like Rearrangement of 1,2,4‐Oxadiazoles with Hydrazine.
Authors: Piccionello Antonio Palumbo , Pace Andrea , Pibiri Ivana , Buscemi Silvestre , Vivona Nicolo 
Published: December 2006

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.
One‐Pot Synthesis of 2‐Aminobenzothiazoles Using a New Reagent of [Bmim]Br3 in [Bmim]BF4.
Authors: Le Zhang‐Gao , Xu Jian‐Ping , Rao Huo‐Yu , Ying Min 
Published: December 2006

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.
Polynuclear Nonfused Bis(1,3,4‐oxadiazole)‐Containing Systems.
Authors: Vereshchagin L. I. , Petrov A. V. , Kizhnyaev V. N. , Pokatilov F. A. , Smirnov A. I. 
Published: December 2006

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.
Tandem Diels—Alder Cycloadditions of 2‐Pyrone‐5‐acrylates for the Efficient Synthesis of Novel Tetracyclolactones.
Authors: Chung Soo‐Im , Seo Joobeom , Cho Cheon‐Gyu 
Published: December 2006

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.
Ag(I)‐Catalyzed Sequential C—C and C—O Bond Formations Between Phenols and Dienes with Atom Economy.
Authors: Youn So Won , Eom Jeong Im 
Published: December 2006

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‐Amino‐3‐hydroxy‐2‐phenyl‐4(1H)‐quinolinone.
Authors: Spacilova Lucie , Hlavac Jan , Hradil Pavel , Frysova Iveta , Malon Michal , Soural Miroslav , Krejci Petr 
Published: December 2006

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.
Ionic Liquid Promoted Facile One‐Pot Synthesis of 1‐Pyridylimidazo[1,5‐a]pyridines from Dipyridylketone and Aryl Aldehydes.
Authors: Siddiqui Shafi A. , Potewar Taterao M. , Lahoti Rajgopal J. , Srinivasan Kumar V. 
Published: December 2006

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 Structure of Non‐Aromatic Porphyrinoid Schiff‐Base Macrocycles Bearing Thiophene.
Authors: Won Dong‐Hoon , Yoon Dae‐Wi , Hong Seong‐Jin , Ha Kwon Soo , Sessler Jonathan L. , Lee Chang‐Hee 
Published: December 2006

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 Dibenzo[b,f][1,4]oxazepin‐11(10H)‐ones from 2‐Nitrobenzoic Acids.
Authors: Samet A. V. , Kislyi K. A. , Marshalkin V. N. , Semenov V. V. 
Published: December 2006

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.
Chemical Constituents of Malagasy Liverworts. Part 5. Prenyl Bibenzyls and Clerodane Diterpenoids with Nitric Oxide Inhibitory Activity from Radula appressa and Thysananthus spathulistipus.
Authors: Harinantenaina Liva , Takahara Yusuke , Nishizawa Takashi , Kohchi Chie , Soma Gen‐Ichiro , Asakawa Yoshinori 
Published: December 2006

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.
Preparation, Isolation, and Characterization of Nα‐Fmoc‐Peptide Isocyanates: Solution Synthesis of Oligo‐α‐Peptidyl Ureas.
Authors: Sureshbabu Vommina V. , Patil Basanagoud S. , Venkataramanarao Rao 
Published: December 2006

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 Inhibition of Superoxide Anion Generation in Human Neutrophils by Viscum coloratum.
Authors: Leu Yann‐Lii , Hwang Tsong‐Long , Chung Yu‐Ming , Hong Pao‐Yun 
Published: December 2006

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 Novel iNOS and COX‐2 Inhibitor from the Aerial Parts of Rodgersia podophylla
Authors: Chin Young‐Won , Park Eun Young , Seo Seung‐Yong , Yoon Kee‐Dong , Ahn Mi‐Jeong , Suh Young‐Ger , Kim Sang Geon , Kim Jinwoong 
Published: December 2006

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.
Iron Oxides: from Molecular Clusters to Solid. A Nice Example of Chemical Versatility
Authors: Jolivet Jean‐Pierre , Tronc Elisabeth , Chaneac Corinne 
Published: December 2006

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.
Photochemistry on Metal Nanoparticles
Authors: Watanabe Kazuo , Menzel Dietrich , Nilius Niklas , Freund Hans‐Joachim 
Published: December 2006

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.
Tris(organosulfanyl)‐ and Tris(organoselanyl)methyllithium Compounds
Authors: Najera Domingo Carmen , Yus Astiz Miguel 
Published: December 2006

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.
Azetidine‐2‐carboxylic Acid. From Lily of the Valley to Key Pharmaceuticals
Authors: Couty Francois , Evano Gwilherm 
Published: December 2006

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.
MgCl2/R′nAl(OR)3‐n: An Excellent Activator/Support for Transition‐Metal Complexes for Olefin Polymerization
Authors: Nakayama Yasushi , Saito Junji , Bando Hideki , Fujita Terunori 
Published: December 2006

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.
Pharmacologically Active Boranes
Authors: Jabbour Adel , Smoum Reem , Takrouri Khuloud , Shalom Eli , Zaks Batia , Steinberg Doron , Rubinstein Abraham , Goldberg Israel , Katzhendler Jehoshua , Srebnik Morris 
Published: December 2006

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.
Homochirality as a Consequence of Thermodynamic Equilibrium?
Authors: Crusats Joaquim , Veintemillas‐Verdaguer Sabino , Ribo Josep M. 
Published: December 2006

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.
Temozolomide in advanced malignant melanoma with small brain metastases
Authors: Boogerd Willem , de Gast Gijsbert C. , Dalesio Otilia 
Published: December 2006

AbstractBACKGROUND.The efficacy of radiotherapy (RT) in patients who have brain metastases from melanoma is limited. In this study, the authors evaluated the efficacy of treatment with temozolomide in patients with metastatic melanoma, including small brain metastases, who did not require immediate RT and investigated the feasibility of deferring RT.METHODS.Patients with brain metastasis were identified from 3 prospective studies of temozolomide (with or without immunotherapy) for metastatic melanoma. Patients with brain metastasis that measured >2 cm, extensive edema, and localization in the brain stem were excluded from the study. For the current analysis, patients with leptomeningeal metastasis and patients who received previous stereotactic RT were excluded. In patients who achieved a systemic response or stabilization to temozolomide, the response of brain metastasis and the necessity for palliative cranial RT were evaluated.RESULTS.Among 179 patients who received temozolomide for advanced melanoma, 52 patients with brain metastasis were evaluable. Stabilization of systemic metastasis was noted in 7 of 52 patients (13%), and there were 6 responses (5 partial responses and 1 complete response; 11%); thus, in those 13 patients, 6 had stabilization of brain metastasis (11%) and 5 had a response (2 partial responses and 3 complete responses; 9%). Immunotherapy did not influence the neurologic response. The median time to neurologic progression was 7 months (range 2–15, months). RT for cerebral recurrence was required in 2 patients. The median survival of patients with brain metastases was 5.6 months (95% confidence interval, 4.4–6.8 months). Intracranial hemorrhagic complications were not observed.CONCLUSIONS.The current results indicated that it is feasible to treat patients who have advanced melanoma and small brain metastasis with temozolomide as the single treatment. The small subset of patients with systemic response usually showed durable stabilization or a response of brain metastasis. With this approach, neurologic disease can be controlled, and cranial irradiation may be deferred and even withheld in most of patients. Cancer 2007. © 2006 American Cancer Society.
Suppression of gastric cancer cell growth by targeting the β‐catenin/T‐cell factor pathway
Authors: Dvory‐Sobol Hadas , Sagiv Eyal , Liberman Eliezer , Kazanov Diana , Arber Nadir 
Published: December 2006

AbstractBACKGROUND.Functional activation of β‐catenin/T‐cell factor (Tcf) signaling plays an important role in the early events of carcinogenesis. Recently, it was demonstrated that adenomatous polyposis coli or β‐catenin genes are mutated frequently in gastric cancer cells. The objective of the current study was to use a gene‐targeting approach to kill human gastric cancer cells selectively with activated β‐catenin/Tcf signaling.METHODS.A recombinant adenovirus that carries a lethal gene (p53 up‐regulated modulator of apoptosis [PUMA]) under the control of a β‐catenin/Tcf‐responsive promoter (AdTOP‐PUMA) was used selectively to target gastric cancer cells (AGS) that posses an active β‐catenin/Tcf pathway. The combined effect of AdTOP‐PUMA and several chemotherapeutic agents (5‐florouracil, doxorubicin, paclitaxel) also was evaluated. Cell viability was measured by methylene blue assay, protein expression was measured by Western blot analysis, and cell cycle and apoptosis were evaluated by fluorescent‐activated cell sorter analysis.RESULTS.The TOP‐PUMA adenovirus inhibited AGS cell growth in a dose‐ and time‐dependent fashion. Growth inhibition was associated with the up‐regulation of PUMA expression and the induction of apoptosis. Chemotherapy synergistically enhanced the killing effect of AdTOP‐PUMA.CONCLUSIONS.Selective targeting of gastric cancer cells with the activated β‐catenin pathway may be a novel and effective therapy in gastric cancer. Combination of this gene‐therapy approach with standard therapy may improve efficacy and reduce toxicity. Cancer 2007. © 2006 American Cancer Society.
Surfactant Effects on Morphology and Switching of Holographic PDLCs Based on Polyurethane Acrylates
Authors: Woo Ju Yeon , Kim Byung Kyu 
Published: December 2006

AbstractEffects of octanoic acid (OA) on the morphology, diffraction efficiency, and electro‐optic properties of the transmission mode of holographic polymer–dispersed liquid crystals (HPDLC) are studied. Droplet size decreases with increasing OA content (0–9 %), and this leads to a monotonic increase in off‐state diffraction with increasing OA content. However, on‐state diffraction decreases with increasing applied voltage and shows a minimum at 6 % OA, for which minimum switching voltage (5 V μm−1) and maximum contrast ratio (10) are obtained. Rise time and decay time decrease with increasing OA content. Interposition of OA between polymer and LC droplet is theoretically predicted by the spreading coefficient (λ>0) calculated on the basis of the solubility parameter, while the coalescence behavior of droplets is described by a dimensionless group (${\gamma d\rho /\mu ^2 }$) called coalescence number.
Hierarchical, Lithium‐Templated Assembly of Helicate‐Type Complexes: How Versatile Is This Reaction?
Authors: Albrecht Markus , Fiege Marcel , Baumert Miriam , de Groot Marita , Fröhlich Roland , Russo Luca , Rissanen Kari 
Published: December 2006

AbstractCatechol ligands that bear carbonyl functions such as esters or aldehydes in the 3‐position (1a–c‐H2) form triple‐stranded, helicate‐type complexes [Li3(1a–c)6Ti2]– with titanium(IV) and the corresponding double‐stranded compounds [Li2(1a–c)4B2] with boron(III) in hierarchical, lithium‐templatedprocesses. The related 8‐hydroxyquinoline ligands 2a,b‐H can be used for the formation of similar complexes[Li3(2a,b)6M2]+ with cobalt(II), nickel(II), or zinc(II). A prerequisite for the formation of the lithium‐bridged dimers is a negative charge of the mononuclear complexes, which are able to electrostatically attract the lithium cations and thus compensate the repulsion between the cations. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Manganese Porphyrin Hosts as Epoxidation Catalysts – Activity and Stability Control by Axial Ligand Effects
Authors: Elemans Johannes A. A. W. , Bijsterveld Edward J. A. , Rowan Alan E. , Nolte Roeland J. M. 
Published: December 2006

AbstractThe catalytic performance of a cavity‐containing [(porphyrin)Mn] in the epoxidation of alkenes is described. Inside the catalyst cavity, nitrogen‐containing axial ligands can be bound to the porphyrin metal with high association constants, resulting in strong activation of the catalyst in the presence of only one equivalent of the ligand. Complexation of a sterically demanding ligand to the outside of the cavity‐containing catalyst can prevent catalyst decomposition through the formation of μ‐oxo dimers.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
DFT Studies toward the Design and Discovery of a Versatile Cage‐Functionalized Proton Sponge
Authors: Singh Ajeet , Ganguly Bishwajit 
Published: December 2006

AbstractPentacyclo[5.4.0.02,6.03,10.05,9]undecane (PCU) derivatives were predicted to be superorganic bases by using DFT methods. The new molecular framework (PCU) is versatile in terms of anchoring different functional groups to achieve high basicities in both the gas and solvent phases. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Subtyping and social consensus: the role of the audience in the maintenance of stereotypic beliefs
Authors: Carnaghi Andrea , Yzerbyt Vincent Y. 
Published: December 2006

AbstractTwo studies investigated the effect of stereotypes held by a prospective audience on participants' reactions to a stereotype‐disconfirming member. In Study 1, participants formed an impression of a positive disconfirming gay in order to communicate it to an audience known to hold a negative versus positive stereotype about gays. As predicted, participants subtyped the deviant more in the former than in the latter case. Moreover, participants' stereotype at the end of the study mirrored the audience's assumed stereotypes about gays. In Study 2, participants learned about a stereotype allegedly held by an ingroup or an outgroup audience about Belgians and then received information about a Belgian who disconfirmed the stereotype. As predicted, the deviant was seen as less typical when he violated the stereotype held by an ingroup than by an outgroup audience. Also, participants' stereotype about Belgians was more similar to the one held by the ingroup audience. A mediational analysis confirmed that participants subtyped the disconfirming member in order to embrace the stereotype advocated by the ingroup audience. Results are discussed in light of recent models of stereotype change. Copyright © 2006 John Wiley & Sons, Ltd.
Blind‐phase noise estimation in OFDM systems by sequential Monte Carlo method
Authors: Panayırcı Erdal , Çırpan Hakan A. , Moeneclaey Marc , Noels Nele 
Published: December 2006

AbstractOne of the main drawbacks of orthogonal frequency division multiplexing (OFDM) systems is the phase noise (PN) caused by the oscillator instabilities. Unfortunately, due to the PN, the most valuable feature namely orthogonality between the carriers, is destroyed resulting in a significant degradation in the performance of OFDM systems. In this paper, based on a sequential Monte Carlo method (particle filtering), a computationally efficient algorithm is presented for estimating the residual phase noise, blindly, generated at the output of the phase tracking loop employed in OFDM systems. The basic idea is to treat the transmitted symbols as ‘missing data’ and draw samples sequentially of them based on the observed signal samples up to time t. This way, the Bayesian estimates of the phase noise is obtained through these samples, sequentially drawn, together with their importance weights. The proposed receiver structure is seen to be ideally suited for highspeed parallel implementation using VLSI technology. The performance of the proposed approaches are studied in terms of average mean square error. Through experimental results, the effects of an initialisation on the tracking performance are also explored. Copyright © 2006 AEIT.
A low complex receiver with interference cancellation for power‐controlled MC‐CDMA downlink transmissions
Authors: Morelli Michele , Sanguinetti Luca , Mengali Umberto 
Published: December 2006

AbstractWe consider the downlink of a power‐controlled MC‐CDMA system in which the near‐far effect limits the performance of single‐user receivers and calls for interference cancellation (IC)‐based schemes. The latter provide enhanced error rate performance but are not suited for downlink applications due to their relatively large complexity. To overcome this problem, we present a novel reduced‐complexity IC‐based detector in which interfering signals are canceled provided that their estimated power exceeds a given threshold. In addition to the channel response, the proposed scheme requires knowledge of the amplitudes of the users' signals. The latter are estimated using two different methods that exploit some pilot blocks placed at the beginning of the downlink frame. Numerical results are given to highlight the effectiveness of the proposed scheme and to make comparisons with other existing IC‐based solutions. Copyright © 2006 AEIT.
Peak‐to‐average power ratio reduction of multi‐carrier CDMA signals with interleaver‐based selected mapping
Authors: Saito Masato , Okuda Akihiro , Okada Minoru , Yamamoto Heiichi 
Published: December 2006

AbstractIn this study, we propose to apply interleavers as a mapping function of selected mapping (SLM) to reduce peak‐to‐average power ratio (PAPR) of multi‐carrier code division multiple access (MC‐CDMA) signals. Additionally, a new method is proposed to send information about selected interleaver without explicit side information. The proposed method employs a scramble code and pilot symbols sent through pilot channel. The SLM with pseudo‐random interleavers enables MC‐CDMA signal transmitter to obtain the same PAPR reduction ability as SLM with random phase rotation, that is conventional SLM with the best phase rotation way. We confirm that the receivers can detect selected interleavers without degradation of bit error rate by the proposed interleaver estimation method. Copyright © 2006 AEIT.
Validation of a HF spread spectrum multi‐carrier technology through real‐link measurements
Authors: Santana‐Sosa Héctor , Zazo‐Bello Santiago , Pérez‐Álvarez Iván A. , Raos Ivana , Mendieta‐Otero Eduardo , López‐Pérez Javier 
Published: December 2006

AbstractThe HF band data communication link has been traditionally desired by many of the large range transmission systems although it is associated to unfavourable performances as low transmission rate, large delay and low confidence in terms of link establishment and maintenance. Although transmission rates may be high enough to transmit digital voice, delay, usually over several seconds, has been the main handicap to let the systems provide interactive digital voice links. Indeed, there is no unclassified equipment with this capability. The main achievement of this proposal is that we are able to guarantee digital voice transmission with low latency, around 135 ms (modem+codec), providing a full interactive digital voice link. Performances of two new 2460 bps HF modems are presented versus the 39‐tone 2400 bps MIL‐STD‐188‐110A modem, working over an ITU‐R moderate channel. Furthermore, these results are corroborated by real tests carried out in a 1800 Km link in the 18 MHz band. Copyright © 2006 AEIT.