bluuebunny/crossref_metadata_2025_split huggingface dataset:
Chiral mono and diamide derivatives of calix[4]arene for enantiomeric recognition of chiral amines
Authors: Kocabas Erdal , Durmaz Mustafa , Alpaydin Sabri , Sirit Abdulkadir , Yilmaz Mustafa 
Published: October 2007

AbstractNovel chiral mono and diamide derivatives of calix[4]arene have been prepared from the aminolysis reaction of 5,11,17,23‐tetra‐tert‐butyl‐25,27‐diethoxycarbonyl‐methoxy‐26,28‐dihydroxycalix[4]arene 1 and 25,27‐diethoxycarbonyl‐methoxy‐26,28‐dihydroxycalix[4]arene 2 with chiral (S)‐(−)‐1‐phenylethylamine (PEA) and (1S,2S)‐(+)‐2‐amino‐1‐(4‐nitrophenyl)‐1,3‐propanediol, respectively. Spectrophotometric titrations have been performed in CHCl3 at 20–30°C in order to obtain the binding constants (K) and the thermodynamic quantities (ΔH and ΔS) for the stoichiometric 1:1 inclusion complexation of various chiral amines with these new host compounds. Preliminary experiments were undertaken to confirm the complexation properties of receptors 9 and 13 with PEA by 1H NMR in CDCl3 at room temperature. The molecular recognition abilities and enantioselectivities for guests (R and S)‐α‐PEA and (R and S)‐cyclohexylethylamine (CHEA) are discussed from a thermodynamic point of view. Chirality, 2007. © 2007 Wiley‐Liss, Inc.
Disentangling the effects of race on breast cancer treatment
Authors: Banerjee Mousumi , George Julie , Yee Cecilia , Hryniuk William , Schwartz Kendra 
Published: October 2007

AbstractBACKGROUND.African Americans (AA) have higher mortality from breast cancer compared with white Americans (WA). Studies using population‐based cancer registries have attributed this to disparities in treatment after normalizing the AA and WA populations for differences in disease stage. However, those studies were hampered by lack of comorbidity data and limited information about systemic treatments. The objective of the current study was to investigate racial disparities in breast cancer treatment by conducting a comprehensive medical records review of women who were diagnosed with breast cancer at the Karmanos Cancer Institute (KCI) in Detroit, Michigan.METHODS.The study cohort consisted of 651 women who were diagnosed with primary breast cancer between 1990 and 1996 at KCI. Multivariable logistic regression analysis controlling for sociodemographic factors, tumor characteristics, comorbidities, and health insurance status was used to assess whether there were differences between WA and AA in the receipt of breast‐conserving surgery (BCS), radiation, tamoxifen, and chemotherapy.RESULTS.There was no significant difference between WA and AA in the receipt of BCS versus mastectomy. Patients with local‐stage disease who were enrolled in government insurance plans underwent mastectomy more often (vs BCS plus radiation) compared with patients who were enrolled in nongovernment plans. The rates of receipt of tamoxifen and chemotherapy were similar for local‐stage WA and local‐stage AA. However, WA were more likely to receive tamoxifen and/or chemotherapy for regional‐stage disease. Married women with regional disease were more likely to receive chemotherapy than nonmarried women.CONCLUSIONS.The results from this study may be used to target educational interventions to improve the use of adjuvant therapies among AA women who have regional‐stage disease. Cancer 2007 © 2007 American Cancer Society.
Advantages of a semi‐analytical approach for the analysis of an evolving structure with contacts
Authors: Denoël V. 
Published: October 2007

AbstractThis paper presents a semi‐analytical approach for the evolution analysis of a beam into given boundaries. The analytical description of contact locations, contact forces and beam deflections results in an exact modelling of the phenomenon (no penetration allowed). Despite the apparent complexity of the problem, the analytical relations leading to two‐point boundary and integro‐restrained differential equations are formally written. An iterative resolution of these equations is adopted by converting the problem into a single‐point boundary value one. Due to a proper selection of the global unknowns, namely the contact forces and their locations, the proposed method is particularly efficient in the context of evolving structures. The resolution is illustrated on a simple example, and comparisons with the finite element method are given as persuasive arguments. Copyright © 2007 John Wiley & Sons, Ltd.
In Situ Spectroscopic Characterization of Rectifying Molecular Monolayers Self‐Assembled on Gold
Authors: Girlando Alberto , Sissa Cristina , Terenziani Francesca , Painelli Anna , Chwialkowska Anna , Ashwell Geoffrey J. 
Published: October 2007

AbstractWe report visible, Raman, and infrared spectra of self‐assembled monolayers (SAMs) formed by the donor‐(π‐bridge)‐acceptor chromophore, Z‐β‐[N‐(ω‐acetylthioalkyl)‐4‐quinolinium]‐α‐cyano‐4‐styryldicyanomethanide (CH3CO‐S‐CnH2n‐Q3CNQ where n=8, 10), on gold‐coated substrates. The data are compared with the spectra collected for the same compound in solution and in the solid state, and with those obtained for a Langmuir–Blodgett (LB) monolayer of C16H33‐Q3CNQ deposited on gold. Spectral analysis confirms that in solution, in the solid state and in the LB film the chromophore has a zwitterionic (D+‐π‐A−) ground state. At variance with this well‐known result, our data show that in SAMs deposited on gold the chromophore has a more neutral, quinoid ground state. We relate this difference to the different packing of the molecules in the two different films: in SAMs in fact the chromophores stand almost vertical with respect to the substrate, whereas in LB films they make an angle of about 45 degrees. The Q3CNQ molecule is a well‐known molecular rectifier, and for SAMs we were able to check the direction of electron flow at forward bias on the same samples that have been characterized spectroscopically, shedding light on the rectification mechanism.
Growth and characterization of succinic acid single crystals
Authors: Krishnan S. , Raj C. Justin , Robert R. , Ramanand A. , Das S. Jerome 
Published: October 2007

AbstractSingle crystals of ferroelectric succinic acid were grown from aqueous solution by low temperature solution growth technique. The cell parameters and space group are found using powder X‐ray diffraction analysis. The presence of the functional groups has been estimated qualitatively by FTIR analysis. The UV‐Visible spectrum shows the cut‐off wavelength at 240 nm. The thermal stability of the crystal was studied by TG/DTA. The dielectric constant of the crystal studied as a function of frequency shows the pyroelectric property. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Subcutaneous tumor seeding following needle core biopsy of hepatocellular carcinoma
Authors: Rowe Leslie R. , Mulvihill Sean J. , Emerson Lyska , Gopez Evelyn V. 
Published: October 2007

AbstractHepatocellular carcinoma (HCC) is the most common primary hepatic tumor and one of the most common cancers worldwide. At present, there are two widely used and accepted methods for obtaining diagnostic material for establishing the likelihood of malignancy in a hepatic mass, namely fine‐needle aspiration (FNA) cytology and needle core biopsy (NCB). In recent years, however, tumor cell seeding along the needle tract has been shown to be a risk associated with using these procedures to obtain a pathologic diagnosis. We report a case of a patient who presented with a nodule in the anterior abdominal wall at the expected location of the previous NCB tract. FNA biopsy of the abdominal wall lesion confirmed the presence of malignant cells consistent with HCC. The finding of tumor seeding within a NCB tract raises the question of the role of NCB in the diagnostic workup of focal liver lesions. Diagn. Cytopathol. 2007;35:717–721. © 2007 Wiley‐Liss, Inc.
A comparative analysis of core needle biopsy and fine‐needle aspiration cytology in the evaluation of palpable and mammographically detected suspicious breast lesions
Authors: Garg Shailja , Mohan Harsh , Bal Amanjit , Attri A. K. , Kochhar Suman 
Published: October 2007

AbstractThe present study was undertaken to compare the efficacy of needle core biopsy (NCB) of the breast with fine‐needle aspiration cytology (FNAC) in breast lesions (palpable and non‐palpable) in the Indian set‐up, along with the assessment of tumor grading with both the techniques. Fifty patients with suspicious breast lesions were subjected to simultaneous FNAC and ultrasound‐guided NCB following an initial mammographic evaluation. Cases were categorized into benign, benign with atypia, suspicious and malignant groups. In cases of infiltrating duct carcinomas, grading was performed on cytological smears as well as on NCB specimens. Both the techniques were compared, and findings were correlated with radiological and excision findings. Out of 50 cases, 18 were found to be benign and 32 malignant on final pathological diagnosis. Maximum number of patients with benign diagnosis was in the fourth decade (42.11%) and malignant diagnosis in the fourth as well as fifth decade (35.48% each). Sensitivity and specificity of mammography for the diagnosis of malignancy was 84.37% and 83.33%, respectively. Sensitivity and specificity of FNAC for malignant diagnosis was 78.15% and 94.44%, respectively, and of NCB was 96.5% and 100%, respectively. But NCB had a slightly higher specimen inadequacy rate (8%). NCB improved diagnostic categorization over FNAC by 18%. Tumor grading in cases of IDC showed high concordance rate between NCB and subsequent excision biopsy (94.44%) but low concordance rate between NCB and FNAC (59.1%). NCB is superior to FNAC in the diagnosis of breast lesions in terms of sensitivity, specificity, correct histological categorization of the lesions as well as tumor grading. Diagn. Cytopathol. 2007;35:681–689. © 2007 Wiley‐Liss, Inc.
Fine‐needle aspiration biopsy of benign adenomyoepithelioma of the breast: Radiologic and pathologic correlation in four cases
Authors: Mercado Cecilia L. , Toth Hildegard K. , Axelrod Deborah , Cangiarella Joan 
Published: October 2007

AbstractBenign adenomyoepithelioma of the breast is a rare tumor in which the cytologic findings have been described in only a few cases. While benign, the imaging and pathologic features may be mistaken for malignancy. We report the aspiration biopsy findings in four cases of adenomyoepithelioma with radiologic and histologic correlation. Cytopathologists should familiarize themselves with this entity to avoid a misdiagnosis of carcinoma. Diagn. Cytopathol. 2007;35:690–694. © 2007 Wiley‐Liss, Inc.
Fine‐needle aspiration biopsy of myxoid liposarcoma metastatic to the liver: Cytomorphologic and cytogenetic features
Authors: Elwood Hillary , Parwani Anil , Cai Guoping 
Published: October 2007

AbstractMyxoid liposarcoma has characteristic cytomorphological features and carries a specific cytogenetic abnormality. Here we describe a case of myxoid liposarcoma metastatic to the liver, which was diagnosed by fine‐needle aspiration biopsy. The aspirate smears revealed numerous oval to round tumor cells embedded in a myxoid background admixed with arborizing capillary vasculature. Some of the tumor cells showed adipocytic differentiation and a few lipoblasts were present. A fluorescence in situ hybridization analysis using CHOP break apart probe 12q13 demonstrated the presence of chromosomal translocation involving the CHOP gene, confirming the diagnosis. The case illustrates that cytomorphological evaluation with a targeted cytogenetic study can render a definite diagnosis of myxoid liposarcoma via fine‐needle aspiration biopsy. Diagn. Cytopathol. 2007;35:734–737. © 2007 Wiley‐Liss, Inc.
Syntheses, Crystal Structures, Thermal Stabilities, and Magnetic and Luminescent Properties of 3D Heterometal Phosphonates: NaM[O3PCH(OH)CO2] (M = Mn, Fe, Co, Zn)
Authors: Lai Zhuzhi , Fu Ruibiao , Hu Shengmin , Wu Xintao 
Published: October 2007

AbstractFour heterometal 2‐hydroxyl(phosphono)carboxylates,NaM[O3PCH(OH)CO2] [M = Mn (1), Fe (2), Co (3), Zn (4)], were synthesized hydrothermally. Single‐crystal X‐ray diffraction data reveal that they are isostructural and crystallize in the orthorhombic space group Pbca (No. 61) with a = 10.1365(16)–10.4557(5) Å, b = 9.6890(9)–9.8265(4) Å, c = 10.7942(19)–10.9353(1) Å, V = 1060.2(3)–1123.22(7) Å3, and Z = 8. Each [MO6] (M = Mn, Fe, Co, Zn) octahedron contacts three neighboring [NaO5] pyramids through two edges and one corner to form a Na/MO layer. The layers are further connected by O3PCH(OH)CO23– groups into an interesting 3D heterometallic framework. Thermogravimetric and powder X‐ray diffraction analysis indicate that solids 1–4 are thermally stable up to 350, 250, 340, and 350 °C, respectively. Magnetic measurements show the presence of antiferromagnetic interaction for MII ions (M = Mn, Fe, Co) in compounds 1–3. These solids exhibit bright cyan (for 1, 2, and 4) or purple (for 3) luminescence after induced by fluorescent whitener, and the luminescence can be irreversibly transformed into bright yellow (for 1 and 4) or red (for 3) simply by annealing treatment at 300 °C.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Benzylideneruthenium Complexes Bearing Pyridine‐Based Ligands and Their Influence on the Formation of Mono‐ or Bis(pyridine) Complexes
Authors: Zhang Wen‐Zhen , He Ren , Zhang Rong 
Published: October 2007

AbstractBenzylideneruthenium complexes bearing the N‐heterocyclic carbene (NHC) ligand 1,3‐bis(2,6‐dimethylphenyl)‐4,5‐dihydroimidazol‐2‐ylidene (H2IMe) and one or two pyridine‐based ligands have been prepared by treating [RuCl2(=CHPh)(H2IMe)(PPh3)] with the corresponding pyridine derivative. X‐ray crystallographic and mass spectrometric evidence is used to investigate the interconversion between mono‐ and bis(pyridine) complexes and the influence of the pyridine ligand on the formation of these complexes. The catalytic activity of these complexes has been tested in the ring‐closing metathesis (RCM) reaction of diallylmalononitrile and the cross metathesis (CM) reaction of acrylonitrile with terminal olefins.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Cross‐Enyne and Ring‐Closing Metathesis Cascade: A Building‐Block Approach Suitable for Diversity‐Oriented Synthesis of Densely Functionalized Macroheterocycles with Amino Acid Scaffolds
Authors: Kotha Sambasivarao , Singh Kuldeep 
Published: October 2007

AbstractSuitably functionalized glycine derivatives undergo a cross‐enyne and ring‐closing metathesis cascade to generate macroheterocyclic ring systems in good yield. These macrocycles, prepared on the basis of a fragment coupling strategy, consist of 13–16‐membered rings. To this end, 1,5‐hexadiene was found to be a promising cross‐coupling partner to generate macrocycles by this tandem metathesis sequence.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Appraisal ratings in diary reports of reasonable and unreasonable anger
Authors: Parkinson Brian , Roper Alison , Simons Gwenda 
Published: October 2007

AbstractForty‐eight undergraduate students completed diaries reporting on up to five episodes of anger experienced over the course of a week. Ratings of motivational relevance, motivational incongruence and other‐accountability appraisals were significantly lower for relatively less reasonable instances of anger. Multilevel modelling confirmed that rated reasonableness of anger was a significant continuous predictor of the same three appraisal dimensions, even after controlling for reported anger. These results extend earlier findings obtained using retrospective questionnaires, suggesting that reportable other‐blame‐related appraisals are generally weaker when anger is perceived as unreasonable. Copyright © 2007 John Wiley & Sons, Ltd.
Determination of glyoxal and methylglyoxal in the serum of diabetic patients by MEKC using stilbenediamine as derivatizing reagent
Authors: Mirza Muhammad A. , Kandhro Abdul J. , Memon Saima Q. , Khuhawar Muhammad Y. , Arain Rafee 
Published: October 2007

AbstractAn analytical method has been developed for the separation of glyoxal (Go), methylglyoxal (MGo), and dimethylglyoxal (DMGo) by MEKC using stilbenediamine (SD) as derivatizing reagent, separation time 6.5 min, SDS as micellar medium at pH 8, and sodium tetraborate (0.1 M) as buffer. Uncoated fused‐silica capillary, effective length 50 cm×75 μm id; applied voltage 20 kV and photodiode array detection, were used. Calibration was linear within 0.02–150 μg/mL with detection limits 3.5–5.8 ng/mL. Go and MGo, observed for diabetic and healthy volunteers, were within 0.098–0.193 μg/mL Go and 0.106–0.245 μg/mL MGo with RSD 1.6–3.5 and 1.7–3.4%, respectively, in diabetics against 0.016–0.046 μg/mL Go and 0.021–0.066 μg/mL MGo with RSDs 1.5–3.5 and 1.4–3.6%, respectively, in healthy volunteers. Go and MGo in diabetics were also measured by standard addition and DMGo as an internal standard. Additives do not contribute significantly to Go and MGo matrix.
Biofiltration of ethyl acetate under continuous and intermittent loading
Authors: Álvarez‐Hornos F. Javier , Gabaldón Carmen , Martínez‐Soria Vicente , Marzal Paula , Penya‐roja Josep‐Manuel , Sempere Feliu 
Published: October 2007

AbstractA laboratory‐scale peat biofilter was used for ethyl acetate removal from an air stream over a period lasting 1 yr. In a first stage, the biofilter was operated under continuous mode: a maximum elimination capacity of 400 g m−3 h−1 was obtained, and ethyl acetate was efficiently degraded with empty bed residence time (EBRT) as short as 22 s. The estimated yield coefficient, determined from the carbon dioxide production, resulted in 0.42 g dry biomass produced per gram of ethyl acetate consumed. The living and the dead cell concentrations were also monitored. The dead cell percentages varied between 18 and 85%, progressive increases in the dead cell percentages were achieved as EBRT decreased and inlet load increased. In a second stage, operation under intermittent loading (16 h/day or 2‐h‐on/2‐h‐off cycles) was performed to investigate the effect of industrial practices such as overnight and weekend shutdowns, intermittent emission or inlet concentration and flow rate peaks. System performance was not significantly affected by changes, demonstrating the process viability for industrial applications. The intermittent loading of 16 h/day resulted in lower penetration of contaminant in the bed in comparison with continuous loading, but the 2‐h‐on/2‐h‐off caused a greater pollutant breakthrough detected at the first quarter of the biofilter, with a high increase in the dead cell density. Respirometric monitoring showed that biomass was fully activated in 1–2 h after night or weekend starvations. Finally, a 15 days starvation period was applied and afterwards operation was restarted. The system performance was fully restored without noticeable reacclimation period and dead cell density recovered normal values. © 2007 American Institute of Chemical Engineers Environ Prog, 2007
A contribution to the phylogeny of annual species of Astragalus (Fabaceae) in the Old World using hair micromorphology and other morphological characters
Authors: Taeb F. , Zarre S. , Podlech D. , Tillich H.‐J. , Kazempour Osaloo S. , Maassoumi A. A. 
Published: October 2007

AbstractA cladistic analysis including 32 annual and nine perennial species of Astragalus along with four outgroups from related genera is performed using characters from hair micromorphology, floral morphology and some other morphological sources. The hair characters show the similar evolutionary trends as known earlier for the genus Astragalus, but they exhibit lower variability in comparison with other major subgroups of Astragalus. The obtained data was compared with the data from molecular systematics. The most important results of this study are: 1) medifixed hairs are developed at least two times among annual Astragalus, 2) fruit morphology, does not provide strong evidence in delimitation of the sections within annual Astragalus, 3) presence of long and thick hairs with largely tuberculate base should be considered as an advanced character, and can be regarded as an important synapomorphy among annual Astragalus, 4) the position of some species of the large and heterogeneous sect. Sesamei, e.g. A. persepolitanus and A. coronilla, and their possible close relationship with the species of the sect. Oxyglottis should be re‐assessed, 5) the species of the sect. Ankylotus show close relationship to sect. Platyglottis, based on floral morphology and hair characters, 6) there are not enough supports from hair, floral morphology and biogeography for considering A. annularis, A. epiglottis (as Glottis epiglottis), A. pelecinus (as Biserrula pelecinus) and A. vogelii (as Podlechiella vogelii) as separated from Astragalus (as suggested by molecular data). Moreover, the inclusion of Barnebyella calycina again in Astragalus is well supported by morphological data. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
K‐feldspar alteration to gel material and crystallization of glauconitic peloids with berthierine in Cretaceous marine sediments—sedimentary implications (Prebetic Zone, Betic Cordillera, SE Spain)
Authors: Jiménez‐Millán Juan , Castro José M. 
Published: October 2007

AbstractGlauconitic peloids from a Hauterivian condensed level in a hemipelagic unit of the Internal Prebetic (Los Villares Formation, eastern Betic Cordillera) have been studied by X‐ray diffraction (XRD), optical microscopy, scanning electron microscopy (SEM) and high‐resolution transmission electron microscopy (HRTEM) and analytical electron microscopy (AEM). The sediments forming the condensed level are characterized by abundant spherical to ovoid green glauconite peloids with radial cracks. Quartz, feldspar and muscovite are also abundant, whereas calcium phosphate is rarely detected. XRD analysis of the peloids reveals glauconite and small amounts of berthierine. SEM and HRTEM data show feldspar dissolution features, a Si–Al‐rich gel‐like substance filling K‐feldspar micropores and interlayering of well‐crystallized glauconite and berthierine packets. The last stage of the glauconitization process resulted in conversion of the smectitic precursor. Sedimentary and mineralogical features indicate an autochthonous origin for the glauconite. The depositional environment was a distal, hemipelagic ramp on the Southern Iberian Continental Palaeomargin. Low sedimentation rates lead to sediment condensation in a general transgressive context. The margin was affected by extensional tectonics, creating tilted blocks, resulting in lateral facies changes. The dissolution of K‐feldspars probably occurred after their deposition in the marine environment but predating the glauconitization. An influx of meteoric water is therefore required, probably related to subsurface fluxes from adjacent emergent areas (the higher parts of tilted blocks). Copyright © 2007 John Wiley & Sons, Ltd.