bluuebunny/crossref_metadata_2025_split huggingface dataset:
Thermal and dynamic mechanical behavior of bionanocomposites: Fumed silica nanoparticles dispersed in poly(vinyl pyrrolidone), chitosan, and poly(vinyl alcohol)
Authors: Chrissafis Konstantinos , Paraskevopoulos Konstantinos M. , Papageorgiou George Z. , Bikiaris Dimitrios N. 
Published: July 2008

AbstractVarious bionanocomposites were prepared by dispersing fumed silica (SiO2) nanoparticles in biocompatible polymers like poly(vinyl pyrrolidone) (PVP), chitosan (Chi), or poly(vinyl alcohol) (PVA). For the bionanocomposites preparation, a solvent evaporation method was followed. SEM micrographs verified fine dispersion of silica nanoparticles in all used polymer matrices of composites with low silica content. Sufficient interactions between the functional groups of the polymers and the surface hydroxyl groups of SiO2 were revealed by FTIR measurements. These interactions favored fine dispersion of silica. Mechanical properties such as tensile strength and Young's modulus substantially increased with increasing the silica content in the bionanocomposites. Thermogravimetric analysis (TGA) showed that the polymer matrices were stabilized against thermal decomposition with the addition of fumed silica due to shielding effect, because for all bionanocomposites the temperature, corresponding to the maximum decomposition rate, progressively shifted to higher values with increasing the silica content. Finally, dynamic thermomechanical analysis (DMA) tests showed that for Chi/SiO2 and PVA/SiO2 nanocomposites the temperature of β‐relaxation observed in tanδ curves, corresponding to the glass transition temperature Tg, shifted to higher values with increasing the SiO2 content. This fact indicates that because of the reported interactions, a nanoparticle/matrix interphase was formed in the surroundings of the filler, where the macromolecules showed limited segmental mobility. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Improved method to determine succinylacetone in dried blood spots for diagnosis of tyrosinemia type 1 using UPLC‐MS/MS
Authors: Al‐Dirbashi Osama Y. , Rashed Mohamed S. , Jacob Minnie , Al‐Ahaideb Lujane Y. , Al‐Amoudi Mohamed , Rahbeeni Zuhair , Al‐Sayed Moeen M. , Al‐Hassnan Zuhair , Al‐Owain Mohamed , Al‐Zeidan Hamad 
Published: July 2008

AbstractWe describe an improved diagnostic method for tyrosinemia type 1 based on quantifying succinylacetone in dried blood spots by ultra‐performance liquid chromatography tandem mass spectrometry. Succinylacetone extracted from a single 3/16 inch disk of specimen collection paper containing a dried blood spot was derivatized with dansylhydrazine, separated on an Acquity UPLC BEH C18 column (2.1 × 50 mm, 1.7 µm) and detected by electrospray ionization tandem mass spectrometry. Succinylacetone derivative eluted at 0.6 min with a complete run time of 1 min. Using a 13C4 labeled succinylacetone as an internal standard, the calibration plot was linear up to 100 µmol/L with a detection limit (S/N = 3) of 0.2 µmol/L. Intra‐day (n = 13) and inter‐day (n = 10) variations were better than 10%. The cutoff level of succinylacetone in dried blood spots from healthy infants obtained by the current method was 0.63 µmol/L (n = 151). In dried blood spots from patients with established tyrosinemia type 1 (n = 11), concentration of succinylacetone was 6.4–30.8 µmol/L. Copyright © 2008 John Wiley & Sons, Ltd.
Argusides B and C, Two New Cytotoxic Triterpene Glycosides from the Sea Cucumber Bohadschia argusJaeger
Authors: Liu Bao‐Shu , Yi Yang‐Hua , Li Ling , Sun Peng , Yuan Wei‐Hua , Sun Guo‐Quan , Han Hua , Xue Mei 
Published: July 2008

AbstractTwo new triterpene glycosides, argusides B and C (1 and 2, resp.), have been isolated from the sea cucumber Bohadschia argus Jaeger collected in the South China Sea. Their structures have been established by spectral analysis (2D‐NMR and ESI‐MS) and chemical evidence. Compounds 1 and 2 both possess a holostane‐type triterpene aglycone with a C(9)C(11) bond and a OH group at C(12), but differ in their substituents at C(17) and the hexasaccharide moiety. The two glycosides exhibited significant cytotoxicities against four human tumor cell lines (A549, HCT‐116, HepG2, and MCF‐7). In comparison with the positive control V‐16 (etoposide), 1 and 2 showed higher cytotoxicities to A549 and HCT‐116 cell lines.
Genetic Characterization and Phytochemical Analysis of Wild and Cultivated Populations of Scutellaria baicalensis
Authors: Su Su , He Chang‐Ming , Li Lin‐Chu , Chen Jia‐Kuan , Zhou Tong‐Shui 
Published: July 2008

AbstractScutellaria baicalensis was collected from four wild and four cultivated populations from different locations in China. Forty‐two samples were analyzed using random amplification of polymorphic DNA (RAPD) techniques for genetic profiling, and high performance liquid chromatography (HPLC) techniques to determine the flavonoid content. The selected 23 RAPD primers yielded a total of 838 clear and reproducible bands of which 237 were found to be polymorphic. The wild population exhibited higher polymorphism than that of the cultivated population. The dendrogram generated by the UPGMA method via Nei's genetic distance revealed three distinct genotypes from the cultivated populations and several branches from the wild populations. The contents of baicalin and wogonoside in dried roots of the samples ranged from (w/w) 8.63 to 17.84%, and from 1.99 to 4.21%, respectively, whereas their aglycones, baicalein and wogonin, were within the range of only 0.04–0.23%. The total content of the four flavonoids varied from 9.45 to 26.24%. Comparatively, the cultivated populations contained much higher levels of baicalin and total flavonoids than those in the wild populations. The results from genetic characterization and phytochemical analysis demonstrated that the quality variation of this drug was mainly determined by extrinsic environmental or agricultural factors, rather than by genetic differences. Our findings can be used for the commercial production and germplasm management of this medicinal plant.
Variation of Volatiles in Tunisian Populations of Teucrium polium L. (Lamiaceae)
Authors: Boulila Abdennacer , Béjaoui Afef , Messaoud Chokri , Boussaid Mohamed 
Published: July 2008

AbstractVolatiles from wild Tunisian diploid (2n=2x=26) and tetraploid (2n=4x=52) Teucrium polium L. populations from five bioclimatic zones were assessed by GC and GC/MS. Thirty‐eight compounds were identified. Main volatiles at the species level were myrcene (6; 15.3%), germacrene D (27; 9.0%), α‐pinene (6.6%), β‐pinene (3; 5.8%), and α‐cadinol (38; 5.1%). A significant variation among populations was observed. The tetraploid populations belonging to the sub humid and lower semi arid bioclimates showed a high amount of myrcene (6; 24.2–43.8%), those from the upper arid contain high percentages of α‐cadinol (38; 50.6%). The dominant compounds in diploid populations, mainly located in the semi arid zone, are α‐pinene (1) and germacrene D (27). Population chemical structure, assessed by a principal component analysis (PCA) using all identified compounds, is concordant with bioclimate and ploidy level. In situ conservation of populations should be made appropriately according to these two factors.
Biflavanones, Flavonoids, and Coumarins from the Roots of Stellera chamaejasme and Their Antiviral Effect on Hepatitis B Virus
Authors: Yang Guohong , Chen Daofeng 
Published: July 2008

AbstractA new 3,3″‐biflavanone, isosikokianin A (1), was isolated from the roots of Stellera chamaejasme, together with eleven known compounds. Their structures and configurations were elucidated by spectroscopic methods including 2D‐NMR techniques. Sikokianin A, chamaechromone, and quercetin showed in vitro antiviral activity against HBsAg secretion.
Hemodynamic evaluation of coronary artery bypass graft lesions using fractional flow reserve
Authors: Aqel Raed , Zoghbi Gilbert J. , Hage Fadi , Dell'Italia Louis , Iskandrian Ami E. 
Published: July 2008

AbstractBackground:Coronary angiography is limited by its inability to assess the hemodynamic significance of a coronary artery stenosis. The assessment of the physiological significance of saphenous vein graft (SVG) lesions with a pressure wire to determine the fractional flow reserve (FFR) is lacking.Methods:FFR was determined in 10 SVG lesions of 10 males who had stress myocardial perfusion imaging (MPI) prior to referral for percutaneous coronary intervention for clinical indications.Results:All SVGs had a diameter stenosis (DS) >50% and 30% had a DS ≥70%. A significant FFR was present in 30% of patients. Ischemia along the territory of the SVG was present in 20% of patients. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of FFR <0.75 for the detection of ischemia on stress MPI were 50, 75, 33, 85, and 70%, respectively. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of FFR <0.75 for detecting ≥70% DS on angiography were 33, 71, 33, 71, and 60%, respectively. There was no significant correlation between FFR and % DS (R2 = 0.1, P = 0.35).Conclusion:The use of FFR to assess the physiological significance of SVG lesions is feasible and provides an acceptable specificity and negative predictive value compared to stress MPI. © 2008 Wiley‐Liss, Inc.
Percutaneous rescue of left ventricular embolized amplatzer septal occluder device
Authors: Balbi Manrico , Pongiglione Giacomo , Bezante Gian Paolo 
Published: July 2008

AbstractTranscatheter atrial septal defect (ASD) closure has proven to be safe and effective, and it is rapidly becoming the standard treatment for secundum‐type ASDs. However, device embolization occurs in about 0.55% of cases, regardless of ASD and device size and/or physician's expertise. Percutaneous retrieval of the embolized device is possible in about 50% of cases, and several techniques have been described, including the use of large sheaths, gooseneck snares, or bioptomes. This is the first successful and reported case of retrieval of an embolized amplatzer septal occluder (ASO) from the left ventricle that was achieved by using a modified snare technique. This was done after an unsuccessful attempt at retrieval with a bioptome that led to a never previously reported complication. Of the 32 reported cases of ASO embolization, percutaneous retrieval was successful in 16 cases (50%) and none were obtained following left ventricular embolization. Even in experienced hands, the observed rate of embolization when using an ASO device is not negligible. Percutaneous retrieval is also possible from the left ventricle but in some cases nonstandardized devices and strategies may be required. © 2008 Wiley‐Liss, Inc.
Long‐term follow‐up of the STARFlex® device for closure of secundum atrial septal defect
Authors: Law M.A. , Josey J. , Justino H. , Mullins C.E. , Ing F.F. , Nugent A.W. 
Published: July 2008

AbstractBackground:There is limited published outcome data on the STARFlex® device for transcatheter closure of atrial septal defects (ASD).Aim:To contribute to the long term outcomes of ASD device closure with the STARFlex® device.Methods:Results of a prospective FDA approved clinical trial (1999–2001) from a single institution of the STARFlex device for simple ASD was reviewed. The inclusion criteria included age ≥2 years, isolated secundum ASD, evidence of right ventricular volume overload, and maximum stretched diameter <22 mm. A retrospective review of the original study data with most recent follow‐up was performed. Clinical success in the trial was defined as complete closure or residual leak ≤2 mm, absence of a severe complication and no need for an additional device or surgery to treat the ASD.Results:Twenty seven (27) patients were prospectively enrolled in the study period with a procedural success in 23 (85%). There were two severe complications, both 40 mm device embolizations that underwent semiurgent surgical intervention for deviceremoval and ASD closure (40 mm device subsequently withdrawn from trial). Device placement was unsuccessful in two patients due to malposition related to an insufficient retro‐aortic rim, with elective surgical closure. Unsuccessful procedural outcomes were statistically associated with deficient rims (P < 0.01). Of the 23 long term follow‐up device patients, 23 (100%) achieved clinical success: 22 (96%) had complete closure at 1 year and latest echocardiographic follow‐up and one case had a small <2 mm residual defect that has persisted. There have been no late complications with normalization of RV volumes in 92% and no deleterious ECG changes. Device fractures occurred in 8/23 (35%) devices and were more common in the larger devices (P < 0.05) but had no sequalae. None required any further intervention to treat the ASD and there were no infectious or thrombotic issues.Conclusions:In this cohort the STARFlex device for secundum ASD closure provided procedural success in 85% with failures due to surgical referral. All 23 patients with a STARFlex device with available long term follow‐up had clinical success. Further long term data is required. © 2009 Wiley‐Liss, Inc.
Coronary no‐reflow phenomenon: From the experimental laboratory to the cardiac catheterization laboratory
Authors: Rezkalla Shereif H. , Kloner Robert A. 
Published: July 2008

AbstractCoronary no‐reflow occurs commonly during acute percutaneous coronary intervention, particularly in patients with acute myocardial infarction and those with degenerated vein grafts. It is associated with a guarded prognosis, and thus needs to be recognized and treated promptly. The pathophysiology originates during the ischemic phase and is characterized by localized and diffuse capillary swelling and arteriolar endothelial dysfunction. In addition, leukocytes become activated and are attracted to the lumen of the capillaries, exhibit diapedesis and may contribute to cellular and intracellular edema and clogging of vessels. At the moment of perfusion, the sudden rush of leukocytes and distal atheroemboli further contributes to impaired tissue perfusion. Shortening the door‐to‐balloon time, use of glycoprotein IIb/IIIa platelet receptor inhibitors and distal protection devices are predicted to limit the development of no‐reflow during percutaneous interventions. Distal intracoronary injection of verapamil, nicardipine, adenosine, and nitroprusside may improve coronary flow in the majority of patients. Hemodynamic support of the patient may be needed in some cases until coronary flow improves. © 2008 Wiley‐Liss, Inc.
ChemInform Abstract: A Comparative Study of GaAsO4 Polymorphs: Ab initio Calculations on High‐Pressure Forms.
Authors: Arroyo y de Dompablo Elena , Moran Emilio 
Published: July 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: Interpenetrating Networks of Three‐Dimensional Penrose Tiles in CaAu3Ga, the Structurally Simplest Cubic Approximant of an Icosahedral Quasicrystal.
Authors: Lin Qisheng , Corbett John D. 
Published: July 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 Structure of the New Compound Pb3+xSb3‐xS7‐xCl1+x (x≈0.45): The Homologous Series Pb(2+2N)(Sb,Pb)(2+2N)S(2+2N)(S,Cl) (4+2N)ClN and Its Polychalcogenide Derivatives (N = 1—3).
Authors: Doussier Charlotte , Moelo Yves , Meerschaut Alain , Leone Philippe , Guillot‐Deudon Catherine 
Published: July 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: F5SN(H)Xe+; a Rare Example of Xenon Bonded to sp3‐Hybridized Nitrogen; Synthesis and Structural Characterization of [F5SN(H)Xe][AsF6].
Authors: Smith Gregory L. , Mercier Helene P. A. , Schrobilgen Gary J. 
Published: July 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: Topotactic Insertion of Lithium in the Layered Structure Li4VO(PO4)2: The Tunnel Structure Li5VO(PO4)2.
Authors: Kishore M. Satya , Pralong V. , Caignaert V. , Malo S. , Hebert S. , Varadaraju U. V. , Raveau B. 
Published: July 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 an N‐Mesityl Substituted Chiral Imidazolium Salt for NHC‐Catalyzed Reactions.
Authors: Struble Justin R. , Kaeobamrung Juthanat , Bode Jeffrey W. 
Published: July 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: Cerium Alkoxides—Synthesis, Properties and Their Use in Michael Addition Reaction.
Authors: Athar Taimur , Reddy K. Ravinder 
Published: July 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: Direct Carbocyclization of Aldehydes with Alkynes: Combining Gold Catalysis with Aminocatalysis.
Authors: Binder Joerg T. , Crone Benedikt , Haug Timm T. , Menz Helge , Kirsch Stefan F. 
Published: July 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: Et2Zn‐Mediated Rearrangement of Bromohydrins.
Authors: Li Lezhen , Cai Peijie , Guo Qingxiang , Xue Song 
Published: July 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 Nanoclusters Supported on Propylurea‐Modified Siliceous Mesocellular Foam for Coupling and Hydrogenation Reactions.
Authors: Erathodiyil Nandanan , Ooi Samuel , Seayad Abdul M. , Han Yu , Lee Su Seong , Ying Jackie Y. 
Published: July 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: Construction of a Chiral Quaternary Carbon Center by Indium‐Catalyzed Asymmetric α‐Alkenylation of β‐Ketoesters.
Authors: Fujimoto Taisuke , Endo Kohei , Tsuji Hayato , Nakamura Masaharu , Nakamura Eiichi 
Published: July 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: 3‐Trifluoromethanesulfonamido‐pyrrolidine: A General Organocatalyst for anti‐Selective Mannich Reactions.
Authors: Pouliquen Mickael , Blanchet Jerome , Lasne Marie‐Claire , Rouden Jacques 
Published: July 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: Diastereoselective Ru‐Catalyzed Cross‐Metathesis—Dihydroxylation Sequence. An Efficient Approach Toward Enantiomerically Enriched syn‐Diols.
Authors: Neisius N. Matthias , Plietker Bernd 
Published: July 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 Oxidative Generation of Ammonium Ylides and the Subsequent Silicon Polonovski Reaction.
Authors: Honda Kiyoshi , Shibuya Hiromasa , Hoshino Yujiro , Inoue Seiichi 
Published: July 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: Realization of anti‐SN2′ Selective Allylation of 4‐Cyclopentene‐1,3‐diol Monoester with Aryl‐ and Alkenyl‐Zinc Reagents.
Authors: Nakata Kenya , Kiyotsuka Yohei , Kitazume Tomoya , Kobayashi Yuichi 
Published: July 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: Chiral Sterically Congested Phosphane‐Amide Bifunctional Organocatalysts in Asymmetric Aza‐Morita—Baylis—Hillman Reactions of N‐Sulfonated Imines with Methyl and Ethyl Vinyl Ketones.
Authors: Guan Xiao‐Yang , Jiang Ying‐Qing , Shi Min 
Published: July 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: Difluoro‐λ3‐Bromane‐Induced Oxidative Carbon—Carbon Bond‐Forming Reactions: Ethanol as an Electrophilic Partner and Alkynes as Nucleophiles.
Authors: Ochiai Masahito , Yoshimura Akira , Mori Takeshi , Nishi Yoshio , Hirobe Masaya 
Published: July 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.