bluuebunny/crossref_metadata_2025_split huggingface dataset:
Activator protein 1‐mediated expression of monocyte chemoattractant protein 1 in cultured rat luteal cells
Authors: Nagaosa Kaz , Aikoshi Izumi , Hasegawa Yuzuru , Nakanishi Yoshinobu 
Published: December 2007

AbstractWe have proposed that luteal cells undergo apoptosis‐dependent phagocytosis by invading monocyte‐derived macrophages in regressive corpora lutea of the rat. Accumulation of monocytes/macrophages seems to be mediated by monocyte chemoattractant protein 1 (MCP‐1) or CCL2, because apoptosis and the production of MCP‐1 mRNA occur simultaneously, but in different luteal cells, in a manner dependent on nuclear factor κB (NF‐κB). In this study, we determined the mechanisms underlying the induction of these two events using primary cultures of rat luteal cells. We found that the activity of the transcription factor activator protein 1 (AP‐1) increased during culturing concomitantly with an increase of MCP‐1 mRNA. The increase of MCP‐1 mRNA was abolished when cultures were maintained in the presence of an inhibitor of either AP‐1 or c‐Jun amino‐terminal kinase (JNK) that phosphorylates and activates c‐Jun, a subunit of AP‐1. Furthermore, the presence of an inhibitor of NF‐κB abrogated an increase in the activity of both AP‐1 and JNK. In contrast, the induction of apoptosis in cultured luteal cells required the action of JNK but appeared to be independent of AP‐1. This may explain why apoptosis and MCP‐1 mRNA production are concomitantly but differentially induced in distinct luteal cells. We therefore suggest the following signaling pathways for the induction of apoptosis and mcp‐1 gene expression during involution of the corpus luteum; NF‐κB's actions lead to the activation of JNK, and the active JNK, at one side, stimulates mcp‐1 gene transcription by activating AP‐1 and, at the other side, induces apoptosis. Mol. Reprod. Dev. 75: 1077–1084, 2007. © 2007 Wiley‐Liss, Inc.
Ethylene polymerization by sterically and electronically modulated Ni(II) α‐diimine complexes
Authors: Bahuleyan Bijal Kottukkal , Son Gi Wan , Park Dae‐Won , Ha Chang‐Sik , Kim Il 
Published: December 2007

AbstractA series of highly active ethylene polymerization catalysts based on bidendate α‐diimine ligands coordinated to nickel are reported. The ligands are prepared via the condensation of bulky ortho‐substituted anilines bearing remote push–pull substituents with acenaphthenequinone, and the precatalysts are prepared via coordination of these ligands to (DME)NiBr2 (DME = 1,2‐dimethoxyethane) to form complexes having general formula [ZN = C(An)‐C(An) = NZ]NiBr2 [Z = (4‐NH2‐3,5‐C6H2R2)2CH(4‐C6H4Y); An, acenaphthene quinone; R, Me, Et, iPr; Y = H, NO2, OCH3]. When activated with methylaluminoxane (MAO) or common alkyl aluminiums such as ethyl aluminium sesquichloride (EAS) all catalysts polymerize ethylene with activities exceeding 107 g‐PE/ mol‐Ni h atm at 30 °C and atmospheric pressure. Among the cocatalysts used EAS records the best activity. Effects of remote substituents on ethylene polymerization activity are also investigated. The change in potential of metal center induced by remote substituents, as evidenced by cyclic voltammetric measurements, influences the polymerization activity. UV–visible spectroscopic data have specified the important role of cocatalyst in the stabilization of nickel‐based active species. A tentative interpretation based on the formation of active and dormant species has been discussed. The resulting polyethylene was characterized by high molecular weight and relatively broad molecular weight distribution, and their microstructure varied with the structure of catalyst and cocatalyst. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 1066–1082, 2008
Synthesis of semitelechelic POSS‐polymethacrylate hybrids by thiol‐mediated controlled radical polymerization with unusual thermal behaviors
Authors: Kotal Atanu , Si Satyabrata , Paira Tapas K. , Mandal Tarun K. 
Published: December 2007

AbstractWe have developed an efficient and versatile method for the synthesis of polyhedral oligomeric silsesquioxanes (POSS)‐polymethacrylate hybrids, such as POSS‐poly(methyl methacrylate) (POSS‐PMMA), POSS‐poly(ethyl methacrylate) (POSS‐PEMA), and POSS‐poly(benzyl methacrylate) (POSS‐PBzMA) of controllable molecular weights and low polydispersities by thiol‐mediated radical polymerization at elevated temperature (100 °C). By tuning the reactant concentrations and degree of polymerization of the grafted polymethacrylate chains, POSS content in these hybrid materials could be varied. MALDI‐TOF‐MS analysis of the hybrid molecule shows that the nanoscale POSS moiety is connected to the end of polymethacrylate chain through the sulfur atom bridge. These hybrid materials were further characterized using various techniques such as FTIR, XRD, NMR, TGA, and DSC. In all synthesized hybrids, the incorporation of POSS moiety at the end of polymethacrylate chain resulted in the decrease of glass transition temperature (Tg) compared to that of neat polymethacrylates of comparable molecular weights. Surprisingly, POSS‐PMMA hybrids only with relatively high POSS content (∼ 10 and 16 wt %) showed physical aging behavior as reveled by DSC study. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 1111–1123, 2008
Ranking the affinity of aromatic residues for carbon nanotubes by using designed surfactant peptides
Authors: Xie Hui , Becraft Eric J. , Baughman Ray H. , Dalton Alan B. , Dieckmann Gregg R. 
Published: December 2007

AbstractA series of surfactant peptides were created to evaluate the affinity of aromatic AAs for single‐walled carbon nanotubes in the absence of complications from peptide folding or self‐association. Each surfactant peptide has a lipidlike architecture, with two Lys residues at the C‐terminus as a hydrophilic head, five Val residues to form a hydrophobic tail, and the testing AA at the N‐terminus. Raman and CD spectroscopic studies reveal that the surfactant peptides have a large unordered structural component which is independent of peptide concentration, suggesting that the peptides undergo minimal association under experimental conditions, thus removing this interference from interpretation of the peptide/carbon nanotube interactions. A lack of peptide self‐association is also indicated by sedimentation equilibrium ultracentrifugation results. Optical spectroscopy of the peptide/carbon nanotube dispersions indicate that among the three aromatic AAs, tryptophan has the highest affinity for carbon nanotubes (both bundled and individual states) when incorporated into a surfactant peptide, while the Tyr‐containing peptide is more selective for individual carbon nanotubes. Phe has the lowest overall affinity for carbon nanotubes. Raman spectra of dispersions made with SPF, SPY and SPW display similar types of nanotubes dispersed, although differences in the relative nanotube populations are observed by optical spectroscopy. Copyright © 2007 European Peptide Society and John Wiley & Sons, Ltd.
Case study using the Los Angeles tall buildings structural design council guidelines: 40‐storey concrete core wall building
Authors: Zekioglu Atila , Willford Michael , Jin Limin , Melek Murat 
Published: December 2007

AbstractLos Angeles Tall Building Design Council (LATBDC) 2005 guidelines for analysis and design of tall buildings are utilized for the design of a 40 storey tall reinforced concrete building located in downtown Los Angeles. The case study structure is a 415 feet tall reinforced concrete residential building with 118 feet by 96 feet plan area. Lateral load carrying system of the building is bearing walls coupled with 32 to 60 inches deep spandrel beams. Gravity system consists of 8″ thick post‐tensioned concrete flat slabs resting on reinforced concrete gravity columns and bearing walls. Linear and nonlinear dynamic analysis procedures were followed using 475 and 2,475 year return period seismic events respectively. Design of core wall segments and spandrel beams connecting the segments together were controlled by both of these seismic hazard levels and analysis procedures. Nonlinear dynamic analysis of the 40 storey building showed inelastic flexural response at the spandrel beams over the building height in addition to the first few levels of the core wall segments. As intended, recorded component deformations were within the collapse prevention performance limits set by FEMA 356. The case study results highlight a significant limitation for Step 2 (Life Safety for DBE) to demonstrate achievement of ‘life safety’. Copyright © 2007 John Wiley & Sons, Ltd.
Prediction of birth weight by fetal crown–rump length and maternal serum levels of pregnancy‐associated plasma protein‐A in the first trimester
Authors: Leung T. Y. , Sahota D. S. , Chan L. W. , Law L. W. , Fung T. Y. , Leung T. N. , Lau T. K. 
Published: December 2007

AbstractObjectiveTo determine whether the first trimester crown–rump length (CRL), maternal serum levels of pregnancy‐associated plasma protein A (PAPP‐A) and free beta‐human chorionic gonadotropin (fβ‐hCG) are independent predictors of birth weight.MethodsThis was an observational study over 1.5 years in Chinese patients who underwent first‐trimester combined screening for Down syndrome in a University fetal medicine unit. After excluding cases with multiple pregnancies, congenital malformations and in‐utero deaths, the relationship between fetal CRL (expressed as standardized Z‐score (Z‐CRL)), maternal PAPP‐A and fβ‐hCG levels (expressed as log10 of multiples of the median) and birth weight (Z‐BW) were analyzed by Pearson's correlation test followed by multiple regression to check for their independency. The predictive power of the independent predictors for small‐for‐gestational age (SGA, defined as birth weight < 10th centile) was then assessed using receiver–operating characteristics (ROC) curves, and the likelihood ratios were derived.ResultsA total of 2760 cases were included. Z‐CRL, log10 PAPP‐AMoM, and log10 fβ‐hCG were positively correlated with Z‐BW (P < 0.0001), but only Z‐CRL and log10 PAPP‐AMoM were independent predictors (P < 0.0001). The areas under the ROC curves of PAPP‐AMoM and Z‐CRL were 0.608 and 0.593, respectively (P < 0.0001). Likelihood ratios increased with decreasing PAPP‐AMoM and Z‐CRL, but were around 1 when the markers were at or above the mean.ConclusionFirst‐trimester CRL and PAPP‐A are independent factors that influence final birth weight. The lower the PAPP‐A and the smaller the CRL, the higher the risk of a fetus becoming SGA. However, their predictive powers are not sufficiently good for them to be used alone for SGA screening. Copyright © 2007 ISUOG. Published by John Wiley & Sons, Ltd.
Fetal aberrant right subclavian artery in normal and Down syndrome fetuses
Authors: Zalel Y. , Achiron R. , Yagel S. , Kivilevitch Z. 
Published: December 2007

AbstractObjectivesTo evaluate the prevalence of fetal aberrant right subclavian artery (ARSA) in a low‐risk population and compare it with that among Down syndrome fetuses, in order to estimate its potential as a marker in Down syndrome screening.MethodsWomen undergoing routine fetal sonographic examination between 13 and 26 weeks of gestation were evaluated once for the presence of ARSA using either a transvaginal multifrequency 5–9‐MHz probe or a transabdominal 4–8‐MHz probe as appropriate. Early pregnancy outcome was obtained in all cases.ResultsNine hundred and twenty‐four fetuses were recruited. An ARSA was detected in 13 fetuses (1.4%) with normal karyotype. During the study period, eight fetuses with Down syndrome referred either with known karyotype or with signs suspicious for Down syndrome were evaluated by the same protocol. Three of eight fetuses (37.5%) were found to have an ARSA. In none of these cases was ARSA an isolated finding. The odds ratio for ARSA in Down syndrome compared with normal fetuses was 42.04 (95% CI, 9.08–194.6).ConclusionsAn ARSA was found in 1.4% of the normal population. In the small group of Down syndrome fetuses we observed a trend towards a higher rate of ARSA than in normal fetuses. In none of the Down syndrome fetuses was ARSA an isolated finding. Larger prospective studies are needed to examine the significance of ARSA as an isolated finding and the potential of ARSA as a marker in Down syndrome screening. Copyright © 2007 ISUOG. Published by John Wiley & Sons, Ltd.
Maternal and fetal hemodynamic effects induced by nitric oxide donors and plasma volume expansion in pregnancies with gestational hypertension complicated by intrauterine growth restriction with absent end‐diastolic flow in the umbilical artery
Authors: Valensise H. , Vasapollo B. , Novelli G. P. , Giorgi G. , Verallo P. , Galante A. , Arduini D. 
Published: December 2007

AbstractObjectiveTo evaluate the effect of plasma volume expansion (PVE) and nitric oxide (NO) donors, in addition to antihypertensive therapy for gestational hypertensive pregnancies complicated by intrauterine growth restriction (IUGR) with absent end‐diastolic flow (AEDF) in the umbilical artery (UA).MethodsThis was a case–control study into which 32 gestational hypertensive pregnancies with IUGR and AEDF were enrolled. Sixteen of these were treated with antihypertensive drugs, NO donors and PVE (Group A), and 16, matched for maternal age, gestational age and fetal conditions, were treated with antihypertensive drugs only (Group B). All patients underwent fetal and uteroplacental assessment and maternal echocardiography to evaluate total vascular resistance (TVR) and cardiac output before and 5–14 days after initiation of treatment.ResultsAfter 5–14 days of treatment, the maternal TVR in Group A fell from 2170 ± 248 to 1377 ± 110 dynes·s·cm−5 (P < 0.01), and that in Group B fell from 2090 ± 260 to 1824 ± 126 dynes·s·cm−5 (P < 0.01), with the reduction being greater in Group A than in Group B (P < 0.01). There was a significant increase in cardiac output in Group A after 5–14 days of treatment vs. baseline (6.19 ± 0.77 vs. 4.32 ± 0.66, P < 0.001), and, after treatment, cardiac output was significantly greater in Group A than it was in Group B (6.19 ± 0.77 vs. 4.70 ± 0.44, P < 0.001). Reappearance of end‐diastolic flow in the UA occurred in 14/16 patients in Group A but in no patients in Group B (87.5% vs. 0%, P < 0.05). The interval between detection of UA‐AEDF and delivery was 28 ± 16 days in Group A and 11 ± 6 days in Group B (P < 0.05).ConclusionAdministration of NO donors and PVE in gestational hypertensive pregnancies affected by IUGR and UA‐AEDF appears to improve both maternal and fetal hemodynamics, inducing prolongation of gestation. Copyright © 2007 ISUOG. Published by John Wiley & Sons, Ltd.
The mer‐Triaquatrichloroiron(III) Molecule in Triethylenediammonium and Piperazinium Chloride Matrices
Authors: James Bruce D. , Skelton Brian W. , White Allan H. 
Published: December 2007

AbstractThe neutral mer‐triaquatrichloroiron(III) molecule, mer‐[(H2O)3FeCl3], has been structurally defined, co‐crystallized with a pair of organic‐cation/chloride salts, from hydrochloric acid solution in each case. The array {[HN(CH2CH2)3NH]Cl2}{mer‐[(H2O)3FeCl3]}, (1) has been previously described in a room‐temperature study in terms of orthorhombic Pnma symmetry; here, at low‐temperature (ca. 153 K), the description is in terms of P212121, with the complex of quasi‐m symmetry. Full m symmetry is achieved in the second complex, {[H2N(CH2CH2)2NH2]Cl2}{mer‐[(H2O)3FeCl3]}, (2) which crystallizes in space group P21/m. Fe–Cl and Fe–O(H2) are very tightly ranged in 1, < > 2.3359(6), 2.051(5) Å, respectively, less so in 2 (2.326(1), 2.340(1); 2.049(2)–2.080(2) Å), despite strong hydrogen‐bonding in the lattice between the hydrogen atoms of the coordinated water molecules and the uncoordinated chloride ions. A redetermination of the structure of FeCl3·6H2O (3), trans‐tetraquadichloroiron(III) chloride dihydrate, is also recorded; at 100 K,Fe–Cl,O are 2.2830(4), 2.0543(9) Å.
Chirale Halbsandwich‐Pentamethylcyclopentadienyl‐Rhodium(III)‐ und Iridium(III)‐Komplexe mit Schiff‐Basen aus Salicylaldehyd und α‐Aminosäureestern [1]
Authors: Böhm Andreas , Brunner Henri , Beck Wolfgang 
Published: December 2007

AbstractChiral Half‐sandwich Pentamethylcyclopentadienyl Rhodium(III) and Iridium(III) Complexes with Schiff Bases from Salicylaldehyde and α‐Amino Acid Esters [1]A series of diastereoisomeric half‐sandwich complexes with Schiff bases from salicylaldehyde and L‐α‐amino acid esters including chiral metal atoms, [(η5‐C5H5)(Cl)M(N,O‐Schiff base)], has been obtained from chloro bridged complexes [(η5‐C5Me5)(Cl)M(μ‐Cl)]2 (M = Rh, Ir). Abstraction of chloride from these complexes with Ag[BF4] or Ag[SO3CF3] affords the highly sensitive compounds [(η5‐C5Me5)M(N,O‐Schiff base]+X− (M = Rh, Ir; X = BF4, CF3SO3) to which PPh3 can be added under formation of [(η5‐C5Me5)M(PPh3)(N,O‐Schiff base)]+X−. The diastereoisomeric ratio of the complexes (1‐7 and 11‐12) has been determined from NMR spectra.
Synthesis and Characterization of Gd2[Pt2(SO4)4(HSO4)2](HSO4)2
Authors: Arndt Annika , Wickleder Mathias S. 
Published: December 2007

AbstractRed single crystals of Gd2[Pt2(SO4)4(HSO4)2](HSO4)2 (triclinic, $P{\bar 1}$, Z = 1, a = 844.02(9), b = 908.50(9), c = 939.49(8) pm, α = 107.73(1)°, β = 112.10(1)°, γ = 103.53(1)°) were obtained by the reaction of [Gd(NO3)(H2O)7][PtCl6]·4H2O with sulfuric acid at 320 °C in a sealed glass ampoule. In the crystal structure, Pt2 dumbbells are coordinated by four chelating sulfate groups and two monodentate hydrogensulfate ions. Two further HSO4− ions are not bonded to the Pt2 dumbbell. The Gd3+ ions are eightfold coordinated by oxygen atoms. The IR data of Gd2[Pt2(SO4)4(HSO4)2](HSO4)2 are typical for these type of compounds. The thermal decomposition of the compound leads to elemental platinum and Gd2O3.
Synthesis, Crystal Structures and Luminescent Properties of Terbium, Neodymium and Yttrium Complexes with a New Amide Type Ligand
Authors: Tang Zheng‐Hua , Liu Dian‐Yi , Tang Yu , Cao Xiao‐Ping 
Published: December 2007

AbstractSolid complexes of terbium, neodymium and yttrium nitrates with an amide type ligand, N‐benzyl‐2‐(benzyloxy)benzamide (L) have been prepared in ethyl acetate and characterized by elemental analysis and IR spectroscopy. The crystal and molecular structures of the complexes TbL3(NO3)3, NdL3(NO3)3 and YL3(NO3)3 have been determined by single crystal X‐ray diffraction. The crystal structures of the complexes are similar. The structures show that the crystal consists of two similar but independent molecules in the asymmetric unit and the metal ion is coordinated toward nine donor atoms, three of which belong to the oxygen atoms of three monodentate ligands and six oxygen atoms from three bidentate nitrates. Furthermore, the REL3(NO)3 complex units are linked by the intermolecular hydrogen bonds to form a three‐dimensional net. At the same time, the luminescent properties of the ligand and the complex TbL3(NO3)3 were studied as well.
Syntheses, Structures, and Polymorphism of β‐Diketonato Complexes – Co(thd)3
Authors: Ahmed M. A. K. , Fjellvåg Helmer , Kjekshus Arne , Dietzel Pascal D. C. 
Published: December 2007

AbstractOxidation of Co(thd)2 dissolved in different solvents has been investigated in air and oxygen atmosphere. In oxygen atmosphere and at the boiling point of the solvents this treatment leads to oxidation of CoII to CoIII, but also to degradation of some of the thd ligands and formation of a new mixed‐ligand complex. Three pure‐cultivated crystalline Co(thd)3 phases are reported: 1 (room‐temperature phase), 2 (low‐temperature phase), and 3 (metastable phase) and in addition there exists an amorphous Co(thd)3 phase (4) with approximate composition Co(thd)3·xH(thd); x = 0.06. Reaction of metal(II) oxides (MO, M = Mn, Fe, and Co) with H(thd) under air or O2 atmosphere is an easy direct route to M(thd)3 complexes. Structure determinations are reported for Co(thd)3 (1–3) based on single‐crystal X‐ray diffraction data. Modification 1 crystallizes in space group $P{\bar 3}c \rm 1$ with a = b = 18.8100(10), c = 18.815(2) Å at 295 K; R(wR2) = 0.180, modification 2 in space group C2/c with a = 28.007(12), b = 18.482(8), c = 21.356(9) Å, β = 97.999(5)° at 100 K; R(wR2) =0.211, and modification 3 in space group Pnma with a = 19.2394(15), b = 18.8795(15), c = 10.7808(8) Å at 100 K; R(wR2) = 0.193. The molecular structures of 1–3 all comprise a central Co atom octahedrally co‐ordinated by the ketonato O atoms of three thd ligands. The transformation between modifications 1 and 2 is of a fully reversible second‐order character. Modifications 1 and 3 are, on the other hand, related by a quasi‐reversible cycle. Heat treatment (specifically sublimation) of 1 leads to 3 whereas re‐crystallization or prolonged storage at room temperature is required to regenerate 1. Co(thd)3 has sufficient thermal stability to permit sublimation without degradation. The various forms of Co(thd)3 are all diamagnetic, viz. a confirmation of the CoIII valence state.
Prenatal antibiotic treatment does not decrease group B streptococcus colonization at delivery
Authors: Baecher Laura , Grobman William 
Published: December 2007

AbstractObjectiveTo evaluate whether an outpatient antibiotic regimen decreased group B streptococcal (GBS) colonization to preclude the use of intrapartum antibiotics.MethodsA double‐blind randomized controlled trial evaluating prenatal oral amoxicillin versus placebo with the primary outcome of GBS colonization at the time of labor.ResultsOf those patients receiving both amoxicillin and a repeat culture at the time of labor, 6 of the 14 (43%) tested positive for GBS colonization. Given persistent GBS colonization of 67% (10/15) in the placebo group, treatment with amoxicillin did not significantly impact colonization at the time of delivery (P = 0.20).ConclusionA regimen of outpatient amoxicillin was associated with persistent GBS colonization in 43% of women at the time of labor. Oral prenatal antibiotic prophylaxis against GBS does not sufficiently reduce colonization to preclude intrapartum intravenous antibiotics.
Concentrations of resveratrol and derivatives in foods and estimation of dietary intake in a Spanish population: European Prospective Investigation into Cancer and Nutrition (EPIC)-Spain cohort
Authors: Zamora-Ros Raul , Andres-Lacueva Cristina , Lamuela-Raventós Rosa M. , Berenguer Toni , Jakszyn Paula , Martínez Carmen , Sánchez María J. , Navarro Carmen , Chirlaque María D. , Tormo María-José , Quirós Jose R. , Amiano Pilar , Dorronsoro Miren , Larrañaga Nerea , Barricarte Aurelio , Ardanaz Eva , González Carlos A. 
Published: December 2007

Resveratrol has been shown to have beneficial effects on diseases related to oxidant and/or inflammatory processes and extends the lifespan of simple organisms including rodents. The objective of the present study was to estimate the dietary intake of resveratrol and piceid (R&P) present in foods, and to identify the principal dietary sources of these compounds in the Spanish adult population. For this purpose, a food composition database (FCDB) of R&P in Spanish foods was compiled. The study included 40 685 subjects aged 35–64 years from northern and southern regions of Spain who were included in the European Prospective Investigation into Cancer and Nutrition (EPIC)-Spain cohort. Usual food intake was assessed by personal interviews using a computerised version of a validated diet history method. An FCDB with 160 items was compiled. The estimated median and mean of R&P intake were 100 and 933 μg/d respectively. Approximately, 32 % of the population did not consume R&P. The most abundant of the four stilbenes studied wastrans-piceid (53·6 %), followed bytrans-resveratrol (20·9 %),cis-piceid (19·3 %) andcis-resveratrol (6·2 %). The most important source of R&P was wines (98·4 %) and grape and grape juices (1·6 %), whereas peanuts, pistachios and berries contributed to less than 0·01 %. For this reason the pattern of intake of R&P was similar to the wine pattern. This is the first time that R&P intake has been estimated in a Mediterranean country.