bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Six‐Membered Ring Systems: Diazines and Benzo Derivatives (2005)
Authors: Groziak Michael P. 
Published: May 2009

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: Five‐Membered Ring Systems: Furans and Benzofurans
Authors: Hou Xue‐Long , Yang Zhen , Yeung Kap‐Sun , Wong Henry N. C. 
Published: May 2009

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: Oxidative Stress in Psychiatric Disorders: Evidence Base and Therapeutic Implications
Authors: Ng Felicity , Berk Michael , Dean Olivia , Bush Ashley I. 
Published: May 2009

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: Adherence of Pseudomonas aeruginosa
Authors: Irvin Randall T. 
Published: May 2009

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: Carbon‐Supported Catalysts for the Chemical Industry
Authors: Arunajatesan Venu , Chen Baoshu , Mobus Konrad , Ostgard Daniel J. , Tacke Thomas , Wolf Dorit 
Published: May 2009

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: Dumbbell‐Shaped Bisfullerene and Conjugated Oligomer Hybrids
Authors: Zhou Ningzhang , Wang Li , Tobin Mark , Thompson David W. , Zhao Yuming 
Published: May 2009

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: Discovery of Chemical Reactions Through Multidimensional Screening
Authors: Brummond Kay M. , Loyer‐Drew Jennifer A. 
Published: May 2009

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: Structures, Energetics and Spectroscopy of Gas Phase Transition Metal Ion — Benzene Complexes
Authors: Duncan Michael A. 
Published: May 2009

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.
Concurrent access control for multi‐user and multi‐processor systems based on trust relationships
Authors: Agudo Isaac , Fernandez‐Gago Carmen , Lopez Javier 
Published: May 2009

AbstractConcurrent access control is an old problem in many fields in Computer Science. It has been solved in many languages and systems, using mechanisms like monitors or priority queues. Nowadays computers implement multi‐core capabilities. This means that they are virtually capable of execution of processes in parallel. This requires new techniques and open new issues in the field of concurrent access control. Moreover, most operating systems are multi‐user; thus, we have to focus on a multi‐processor multi‐user scenario. Trust becomes a paramount aspect when building distributed applications; the same applies on a lower scale in modern computers. We propose the use of a trust graph that keeps record of the trust relationships of the system and helps in deciding on concurrent access requests. The information encoded in the graph will be used both in order to decide on the access requests and to order granted requests in terms of their associated trust level. Copyright © 2009 John Wiley & Sons, Ltd.
Monoanion BH4−Can Stabilize Zwitterionic Glycine with Dihydrogen Bonds
Authors: Tian Shan Xi , Li Hai‐Bei , Yang Jinlong 
Published: May 2009

AbstractUnusual strength:In the complex glycine–BH4−, unconventional dihydrogen bonds are predicted. An ultrashort dihydrogen bond BH⋅⋅⋅HN and a very strong interaction of about −41 kcal mol−1) are found in complex3(see structures), in which the zwitterionic glycine is stabilized with a big margin.magnified image
Identification of novel HMGA2 fusion sequences in lipoma: Evidence that deletion of let‐7 miRNA consensus binding site 1 in the HMGA2 3′ UTR is not critical for HMGA2 transcriptional upregulation
Authors: Wang Xiaoke , Hulshizer Rachael L. , Erickson‐Johnson Michele R. , Flynn Heather C. , Jenkins Robert B. , Lloyd Ricardo V. , Oliveira Andre M. 
Published: May 2009

AbstractLipoma is a benign tumor composed of mature adipocytes and one of the most common mesenchymal tumors seen in adults. Rearrangement of HMGA2 in chromosome band 12q15 has been found in ∼60–70% of ordinary lipomas with cytogenetic abnormalities. Herein, we report two novel HMGA2 fusion sequences in lipomas with chromosome 12 rearrangements. Cytogenetic studies showed 12q abnormalities in both cases, and fluorescence in situ hybridization (FISH) confirmed the involvement of HMGA2 in each instance. Rapid amplification of cDNA ends (RACE) PCR experiments revealed that one lipoma contained a fusion of the HMGA2 3′ untranslated region (UTR) to a genomic area downstream of the DYRK2 locus on 12q15; the second lipoma showed a fusion of the HMGA2 3′ UTR to a genomic sequence upstream of the DCN locus on 12q21. In both instances the breakpoint on HMGA2 occurred downstream to let‐7 miRNA (microRNA) consensus binding site (CBS) 1. These two and several other previously reported tumors containing HMGA2 3′ UTR rearrangements show breakpoints after let‐7 miRNA CBS 1, which suggests that the elimination of this miRNA binding site is not critical for driving HMGA2 transcriptional upregulation. © 2009 Wiley‐Liss, Inc.
Barriers to early detection and treatment of head and neck squamous cell carcinoma in African American men
Authors: Carroll William R. , Kohler Connie L. , Carter Vivian L. , Hannon Lonnie , Skipper Joni B. , Rosenthal Eben L. 
Published: May 2009

AbstractBackground.African Amercians afflicted with head and neck squamous cell carcinoma (HNSCC) have a strikingly worse survival than do whites. One apparent cause is an advanced stage of presentation in African Americans. This study was designed to identify barriers to early treatment among African American men.Methods.Twenty‐four African American male HNSCC survivors completed structured interviews. Interviewers elicited the participants' experiences from symptom recognition to receiving definitive care.Results.Most participants were seen with advanced‐stage HNSCC. Overall, 10% experienced barriers to obtaining early medical care, though 30% were hesitant to seek care due to perceived barriers. Definitive treatment began for 81% within 3 months of initial care seeking.Conclusion.Once participants sought care, most of them received definitive treatment within a reasonable time frame. To explain the advanced stage at presentation, either tumor growth rate was extremely rapid or participants sought care when the tumor was quite advanced. The themes suggested by this elicitation study require further validation. © 2009 Wiley Periodicals, Inc. Head Neck, 2009
Bio‐functionalized star PEG‐coated PVDF surfaces for cytocompatibility‐improved implant components
Authors: Heuts Jean , Salber Jochen , Goldyn Alexandra M. , Janser Romy , Möller Martin , Klee Doris 
Published: May 2009

AbstractUnmodified and GRGDS peptide‐modified six arm PEG star based hydrogels (Star PEG) have been applied as a multifunctional, easy to handle coating system for textile polyvinylidene fluoride (PVDF) structures, which prevent unspecific protein and cell adsorption and control‐specific cell adhesion. The reactive isocyanate‐terminated Star PEG has been successfully applied to ammonia‐plasma treated two‐ and three‐dimensional PVDF surfaces. Easy modification of the surface hydrogel by mixing in of GRGDS peptide during the coating step or subsequent coupling of GRGDS was determined by TOF‐SIMS. Unmodified and GRGDS‐functionalized hydrogel surfaces show distinct protein repellency, as demonstrated by fluorescence microscopy after incubation with fluorescent labeled proteins and Surface MALDI‐TOF‐Mass Spectroscopy. Cell culture experiments with primary human dermal fibroblasts, primary fetal rat fibroblasts, and human osteoblasts on GRGDS and/or KRSR Star PEG‐modified two‐ and three‐dimensional substrates show advancement in cell adhesion and proliferation compared with untreated PVDF surfaces, whereas pure star PEG‐coated surfaces show no cell adhesion. The combination of protein and cell repellent properties with specific biofunctionality and easy application of the coatings will enable their application for 3D‐scaffolds. © 2009 Wiley Periodicals, Inc. J Biomed Mater Res, 2010
Rapid outdoor non‐destructive detection of organic minerals using a portable Raman spectrometer
Authors: Jehlička J. , Vítek P. , Edwards H. G. M. , Hargreaves M. , Čapoun T. 
Published: May 2009

AbstractRaman spectral signatures have been obtained for a series of organic minerals using a compact portable Raman instrument equipped with 785‐nm laser excitation. Well‐resolved Raman spectra of crystalline salts of carboxylic acids, whewellite and mellite, as well as of the aromatic mineral idrialite were recorded. For comparative purposes, an amorphous fossil resin, baltic amber, was also investigated. The results obtained confirm that portable Raman instruments can be considered as excellent tools for field geological applications, including the detection of organic minerals in the frame of outcrops of sedimentary rocks or coal beds. Organic minerals can be added to the list of established biomarkers, including porphyrins, hydrocarbons and organic acids, which are important for the study with regard to future exobiological missions such as the ESA ExoMars mission to detect the presence of extinct or extant life on Mars. Copyright © 2009 John Wiley & Sons, Ltd.
Raman spectroscopic study of the arsenite minerals leiteite ZnAs2O4, reinerite Zn3(AsO3)2 and cafarsite Ca5(Ti,Fe,Mn)7(AsO3)12·4H2O
Authors: Frost Ray L. , Bahfenne Silmarilly 
Published: May 2009

AbstractThe selected arsenite minerals leiteite, reinerite and cafarsite have been studied by Raman spectroscopy. Density functional theory (DFT) calculations enabled the position of the AsO22− symmetric stretching mode at 839 cm−1, the antisymmetric stretching mode at 813 cm−1 and the deformation mode at 449 cm−1 to be calculated. The Raman spectrum of leiteite shows bands at 804 and 763 cm−1 assigned to the As2O42− symmetric and antisymmetric stretching modes. The most intense Raman band of leiteite is the band at 457 cm−1 and is assigned to the ν2 As2O42− bending mode. A comparison of the Raman spectrum of leiteite is made with the arsenite minerals reinerite and cafarsite. Copyright © 2009 John Wiley & Sons, Ltd.
pH‐dependent surface‐enhanced Raman scattering observation of sulfanilamide on the silver surface
Authors: Zhu Xuan , Wang Na , Zhang Rui , Song Wei , Sun Yiping , Duan Guoping , Ding Wen , Zhang Zongrang , Yang Haifeng 
Published: May 2009

AbstractMonolayers of sulfanilamide on metallic surface can serve as an ideal model for understanding the interaction mechanism between the metal and the sulfanilamide molecule. In the present paper, the surface‐enhanced Raman scattering (SERS) technique was employed to obtain the SERS spectra of sulfanilamide monolayers formed on the silver surface under different pH values. Assignments of the spectra were carried out with the aid of density functional theory (DFT) calculations (BLYP/6‐311G). It can be found that the adsorption function of sulfanilamide on the silver surface was influenced by the pH value. The fully protonated sulfanilamide molecule adsorbed on the silver surface through N13H2 group and the benzene ring anchored in a relatively perpendicular manner leading to N7H2 and S10O2 groups near the surface, while the completely deprotonated sulfanilamide molecule attached on the silver surface via N7H2 and the benzene ring was perpendicular to, and the N13H2 and S10O2 groups were far from the silver surface. Copyright © 2009 John Wiley & Sons, Ltd.
Complete basis set prediction of methanol isotropic nuclear magnetic shieldings and indirect nuclear spin–spin coupling constants (SSCC) using polarization‐consistent and XZP basis sets and B3LYP and BHandH density functionals
Authors: Kupka Teobald 
Published: May 2009

AbstractEfficient B3LYP and BHandH density functionals were used to estimate methanol's nuclear magnetic isotropic shieldings and spin–spin coupling constants in the basis set limit. Polarization‐consistent pcS‐n and pcJ‐n (n = 0, 1, 2, 3 and 4), and segmented contracted XZP, where X = D, T, Q and 5, basis sets were used and the results fitted with simple mathematical formulas. The performance of the methods was assessed from comparison with experiment and higher level calculations. 1J(CH) and 3J(HH) values were determined from very diluted solutions in deuterochloroform and compared with theoretical predictions. The agreement between complete basis set (CBS) density functional theory (DFT) predicted isotropic shieldings and spin–spin values and experiment was good. The BHandH/pcS‐n methanol shieldings obtained using structures optimized at the same level of theory are approaching the accuracy of the advanced coupled‐cluster‐singles‐doubles‐approximate triples (CCSD(T)) calculations. Copyright © 2009 John Wiley & Sons, Ltd.
Mononucleotide precedes dinucleotide repeat instability during colorectal tumour development in Lynch syndrome patients
Authors: Ferreira Ana M , Westers Helga , Sousa Sónia , Wu Ying , Niessen Renée C , Olderode‐Berends Maran , van der Sluis Tineke , Reuvekamp Peter TW , Seruca Raquel , Kleibeuker Jan H , Hollema Harry , Sijmons Rolf H , Hofstra Robert MW 
Published: May 2009

AbstractA progressive accumulation of genetic alterations underlies the adenoma–carcinoma sequence of colorectal cancer. This accumulation of mutations is driven by genetic instability, of which there are different types. Microsatellite instability (MSI) is the predominant type present in the tumours of Lynch syndrome patients and in a subset of sporadic tumours. It is generally accepted that MSI can be found in the early stages of tumour progression, such as adenomas; however, the frequencies reported vary widely among studies. Moreover, data on the qualitative differences between adenomas and carcinomas, or between tumours of hereditary and sporadic origin, are scarce. We compared MSI in samples of colorectal adenoma and colorectal carcinoma in order to identify possible differences along the adenoma–carcinoma sequence. We compared germline mismatch repair (MMR) gene mutation carriers and non‐carriers, to address possible differences of instability patterns between Lynch syndrome patients and patients with sporadic tumours. We found a comparable relative frequency of mono‐ and dinucleotide instability in sporadic colorectal adenomas and carcinomas, dinucleotide instability being observed most frequently in these sporadic tumours. In MMR gene truncating mutation carriers, the profile was different: colorectal adenomas showed predominantly mononucleotide instability and in colorectal carcinomas, also more mononucleotide than dinucleotide instability was detected. We conclude that MSI profiles differ between sporadic and Lynch syndrome tumours, and that mononucleotide marker instability precedes dinucleotide marker instability during colorectal tumour development in Lynch syndrome patients. As mononucleotide MSI proves to be highly sensitive for detecting mutation carriers, we propose the use of mononucleotide markers for the identification of possible Lynch syndrome patients. Copyright © 2009 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Product‐specific sample clean‐up and HPLC analysis of aflatoxins for a dietary product
Authors: Zahn Michael , Jeong Mijeong Lee , Wang Desheng , Trinh Thao , Fay Brooke , Ma Wenwen 
Published: May 2009

AbstractIntroductionA sample clean‐up procedure has been developed for a complex dietary ingredient, Unigen Inc. (Lacey, WA, USA) product A (a proprietary mixture of Scutellaria baicalensis and Acacia catechu extracts), for the determination of aflatoxins by HPLC.ObjectiveTo develop an appropriate sample specific clean‐up procedure that removes interferences from the sample for the determination of total aflatoxins B1, B2, G1 and G2 at or lower than 20 ppb by HPLC.MethodologyThe sample specific clean‐up procedure was developed based on the modification of AOAC method 990.33.ResultsCoextract interferences were removed with the clean‐up procedure. The recovery of total aflatoxins was 70% with RSD about 2%; the LOD and LOQ were 1.6 and 5.2 ppb, respectively, for total aflatoxins; the linearity R2 > 0.99. None of the samples tested showed the presence of detectable aflatoxins.ConclusionThe modified clean‐up method was effective to remove coextract interferences from Unigen product A samples. Copyright © 2009 John Wiley & Sons, Ltd.
Investigation of multi‐walled carbon nanotube‐reinforced high‐density polyethylene/carbon black nanocomposites using electrical, DSC and positron lifetime spectroscopy techniques
Authors: Jeevananda Thimmaraju , Kim Nam Hoon , Lee Joong Hee , Basavarajaiah Siddaramaiah , Deepa Urs MV , Ranganathaiah Chikkakuntappa 
Published: May 2009

AbstractBACKGROUND: The positive temperature coefficient (PTC) effect on material properties has attracted much attention in recent years due to the prospects of many applications like temperature sensors, thermistors, self‐regulating heaters, etc. It has been suggested that incorporation of multi‐walled carbon nanotubes (MWNTs) into carbon black (CB)‐filled polymers could improve the electrical properties of composites due to high conductivity and network structure and significantly reduce the required CB loading.RESULTS: We observed no change in melting temperature and crystalline transition temperature on addition of MWNTs. However, the heat of fusion decreases as the amount of conducting carboxylated MWNT (c‐MWNT) filler increases and the resistivity of the composite decreases. The free volume shows an increase up to 1.5 wt% of c‐MWNT content and then decreases.CONCLUSION: Well‐developed crystals could not be formed due to restricted chain mobility as filler content increases. This results in minimum intermolecular interactions, and thus a decreased heat of fusion. A composite with c‐MWNT content of 0.5 wt% showed the highest PTC and higher resistivity at 150 °C possibly due to the formation of flocculated structures at elevated temperature. For filler content greater than 1.5 wt%, the decrease in free volume may be due to restricted chain mobility. Copyright © 2009 Society of Chemical Industry
Dielectric behaviour and relaxation processes of montmorillonite clay nano‐platelet colloidal suspensions in poly(vinyl pyrrolidone)–ethylene glycol oligomer blends
Authors: Sengwa Ram Jeewan , Choudhary Shobhna , Sankhla Sonu 
Published: May 2009

AbstractBACKGROUND: Intercalated and exfoliated montmorillonite (MMT) clay structures in polymer matrices improve the thermal, mechanical, electrical and pharmaceutical properties of organic–inorganic materials. Poly(vinyl pyrrolidone) (PVP)–ethylene glycol oligomer (EGO) blends are biocompatible and non‐toxic materials. The dielectric characterization of MMT clay nano‐platelet colloidal suspensions in PVP–EGO blends is important in understanding the ionic conduction behaviour in many complex phenomena occurring in biological systems, and in selective membranes and their use in controlled drug release systems and in liquid electrolytes.RESULTS: An investigation using dielectric spectroscopy in the 20 Hz to 1 MHz frequency range of MMT clay nano‐platelet colloidal suspensions in PVP–EGO blends confirmed that the PVP segmental motion, ionic conduction relaxation time, electric double layer relaxation time and direct current electrical conductivity are significantly influenced by the clay concentration and EGO chain length. In these materials, ionic motion and PVP segmental dynamics are strongly coupled. Intercalation of EGO structures in clay galleries and exfoliation of clay platelets by adsorption of PVP–EGO structures on clay surfaces are governed by hydrogen bonding interactions between the carbonyl groups of PVP monomer units, the hydroxyl groups of EGOs and the hydroxylated aluminate surfaces of the MMT clay.CONCLUSION: The dielectric behaviour of intercalated and exfoliated structures of MMT clay nano‐platelet colloidal suspensions in PVP–EGO blends provides a convenient way to obtain liquid organic‐inorganic polymeric nanocomposite electrolytes with tailored ionic conduction properties. Copyright © 2009 Society of Chemical Industry
The effects of dioctyl phthalate plasticization on the morphology and thermal, mechanical, and rheological properties of chemical crosslinked polylactide
Authors: Yang Sen‐Lin , Wu Zhi‐Hua , Meng Bing , Yang Wei 
Published: May 2009

AbstractThe tensile strength and thermal stability of polylactide (PLA) were significantly improved through chemical crosslinking. However, it became much more rigid and brittle. To obtain a material with good thermal stability and enhanced ability to plastic deformation, chemical crosslinked PLA with 0.5 wt % triallyl isocyanurate and 0.5 wt % dicumyl peroxide was blended with different contents of dioctyl phthalate (DOP). The advantage of using DOP is that it does not crystallize, has low glass transition temperature, and is miscible with PLA. The morphology and the thermal and mechanical properties of the crosslinked PLA and the blends of crosslinked PLA with various contents of DOP were investigated by means of scanning electron microscope, differential scanning calorimetry, tensile test, and dynamic mechanical analysis. The rheological properties of samples were also explored by using a capillary rheometer. The results showed that the DOP was an effective plasticizer for the chemical crosslinked PLA, resulting in a significantly decreased Tg, lower yield stress, and improved elongation at break. The plasticization effect was enhanced by adding higher DOP content. In addition, the DOP enhanced the crystallinity of crosslinked PLA, and all the crosslinked samples showed better heat stability than neat PLA. The apparent viscosity of the blends decreased with the increase of DOP content and a phase separation occurred when the content of DOP exceeded 12.5 wt %. © 2009 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 47: 1136–1145, 2009