bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of daily water treatment on hatchling sex ratios in a turtle with temperature‐dependent sex determination
Authors: LeBlanc Anne Marie , Wibbels Thane 
Published: October 2008

AbstractSome previous studies indicate that the local hydric environment may influence sex determination in turtles with temperature‐dependent sex determination. In this study, the effect of a daily application of 0.77 mL of ddH20 per egg using an incubation temperature of 29.1°C was examined during the temperature‐sensitive period for two consecutive nesting seasons. This regimen yielded sex ratios of 11.8 and 11.1% male in control groups not receiving water supplementation, whereas daily water treatments resulted in sex ratios of 86.7 and 45.7% male during the 2006 and 2007 nesting seasons, respectively. The results indicate that daily water treatments significantly influenced sex ratios (P<0.001). In addition to providing insight on the physiology of sex determination, these results could have implications for studies predicting sex ratios from nests on natural nesting beaches that are periodically exposed to rain. J. Exp. Zool. 311A:68–72, 2009. © 2008 Wiley‐Liss, Inc.
Japanese medaka Hox paralog group 2: insights into the evolution of Hox PG2 gene composition and expression in the Osteichthyes
Authors: Davis Adam , Scemama Jean‐Luc , Stellwag Edmund J. 
Published: October 2008

AbstractHox paralog group 2 (PG2) genes function to specify the development of the hindbrain and pharyngeal arch‐derived structures in the Osteichthyes. In this article, we describe the cDNA cloning and embryonic expression analysis of Japanese medaka (Oryzias latipes) Hox PG2 genes. We show that there are only two functional canonical Hox genes, hoxa2a and b2a, and that a previously identified hoxa2b gene is a transcribed pseudogene, ψhoxa2b. The functional genes, hoxa2a and b2a, were expressed in developing rhombomeres and pharyngeal arches in a manner that was relatively well conserved compared with zebrafish (Danio rerio) but differed significantly from orthologous striped bass (Morone saxatilis) and Nile tilapia (Oreochromis niloticus) genes, which, we suggest, may be owing to effects of post‐genome duplication loss of a Hox PG2 gene in the medaka and zebrafish lineages. ψhoxa2b was expressed at readily detectable levels in several noncanonical Hox expression domains, including the ventral aspect of the neural tube, the pectoral fin buds and caudal‐most region of the embryonic trunk, indicative that regulatory control elements needed for spatio‐temporal expression have diverged from their ancestral counterparts. Comparative expression analyses showed medaka hoxa2a and b2a expression in the 2nd pharyngeal arch (PA2) beyond the onset of chondrogenesis, which, according to previous hypotheses, suggests these genes function redundantly as selector genes of PA2 identity. We conclude that Hox PG2 gene composition and expression have diverged significantly during osteichthyan evolution and that this divergence in teleosts may be related to lineage‐dependent differential gene loss following an actinopterygian‐specific whole genome duplication. J. Exp. Zool. (Mol. Dev. Evol.) 310B:623–641, 2008. © 2008 Wiley‐Liss, Inc.
Possible solar control on primary production along the Indian west coast on decadal to centennial timescale
Authors: Kurian Siby , Agnihotri Rajesh , Borole D. V. , Naqvi S. Wajih A. , Ferreira Ana M. , Vale Carlos 
Published: October 2008

AbstractUsing multiple geochemical proxies including specific biomarkers (dinosterol, phytol, stigmasterol and β‐sitosterol) measured in a high‐sedimentation rate core collected from the inner shelf (depth ∼45 m) off Goa (India), we reconstruct surface productivity, which is mainly controlled by the monsoon upwelling in this region, during the last ca. 700 a. Surface productivity appears to have varied in tandem with the Konkan–Goa rainfall and sunspot activity during the instrumental period (last 250 a). The productivity proxies also covary with the total solar irradiance reconstructed for the period beyond the instrumental era, within the considerable uncertainty of the age model. This suggests that solar forcing may control coastal upwelling intensity and biological productivity in the eastern Arabian Sea on decadal to centennial timescales. During the late Anthropocene (last ca. 50 a), steep increases in all four biomarkers indicate greatly enhanced productivity in response to high solar irradiance as well as anthropogenic inputs of nutrients. Copyright © 2008 John Wiley & Sons, Ltd.
Size‐dependent SERS enhancement of colloidal silver nanoplates: the case of 2‐amino‐5‐nitropyridine
Authors: Sant'Ana A. C. , Rocha T. C. R. , Santos P. S. , Zanchet D. , Temperini M. L. A. 
Published: October 2008

AbstractSurface‐enhanced Raman scattering (SERS) spectra of 2‐amino‐5‐nitropyridine (ANP) adsorbed on colloidal silver triangular nanoplates were obtained using samples with different mean sizes and surface plasmon frequencies. The relative SERS enhancement factor for each sample was determined by the analysis of the normalized SERS excitation profiles of ANP vibrational modes for nanoplates in suspension, without aggregation. The SERS profiles are blue‐shifted in relation to the localized surface plasmon peak. The detailed characterization of both morphology and concentration of the samples in addition to a rigorous normalization of the SERS spectra allowed a quantitative correlation between the SERS profiles and the mean size of the nanoplates. This correlation indicated the existence of an optimum size of the nanoplates for maximum Raman enhancement. Copyright © 2008 John Wiley & Sons, Ltd.
Molecular orientation evolution during low‐density polyethylene blown film extrusion using real‐time Raman spectroscopy
Authors: Gururajan Giriprasath , Ogale Amod A. 
Published: October 2008

AbstractReal‐time polarized Raman spectroscopy was used in this study to measure the molecular orientation evolution during blown film extrusion of low‐density polyethylene (LDPE). Spectra were obtained at different locations along the blown film line, starting from the molten state near the die and extending up to the solidified state near the nip rolls. The trans CC symmetrical stretching vibration of polyethylene (PE) at 1132 cm−1 was analyzed for films possessing uniaxial symmetry. For the given peak, the principal axis of the Raman tensor is coincident with the c‐axis of the orthorhombic crystal, and was used to solve a set of intensity ratio equations to obtain second (〈P2(cosθ)〉) and fourth (〈P4(cosθ)〉) moments of the orientation distribution function. The orientation parameters (P2, P4) were found to increase along the axial distance in the film line even past the frost‐line height (FLH). The P2 values also showed an increasing trend with crystalline evolution during extrusion, consistent with past observations that molecular orientation takes place even after the blown film diameter is locked into place. It was also found that the integral ratio (I1132/I1064) obtained from a single, ZZ‐back‐scattered mode can provide a reasonable estimate of molecular orientation. These results indicate the potential of real‐time Raman spectroscopy as a rapid microstructure monitoring tool for better process control during blown film extrusion. Copyright © 2008 John Wiley & Sons, Ltd.
The relaxations of temporal bond polarizabilities of methylviologen adsorbed on the Ag electrode by 514.5 nm excitation: a Raman intensity study
Authors: Fang Chao , Wu Guozhen 
Published: October 2008

AbstractAn algorithm to elucidate the temporal bond polarizabilities from the surface enhanced Raman (SERS) intensities was employed to the case of methylviologen (MV) adsorbed on the Ag electrode. This enables us to obtain the properties of its SERS mechanisms and the effect of its adsorption. The analysis shows that the charge transfer and electromagnetic mechanisms involving in this MV SERS system possess different relaxation times for its various temporal bond polarizabilities. The physics is that the process involved in the charge transfer mechanism will take longer time than that involved in the electromagnetic mechanism since it needs more time to redistribute the charges during relaxation. The time division between these two mechanisms is figured out to be around 3 ps for this system. Adsorption also enhances the relaxation of the temporal bond polarizabilities, in general. The adsorption effect is indicated by the temporal bond polarizabilities close to the final stage of relaxation. They are, in fact, the quantities parallel to the bond electronic densities in the molecular orbital (MO) concept. For comparison, the case of MV solid was also analyzed. Copyright © 2008 John Wiley & Sons, Ltd.
Trissarcosine barium(2 + ) dibromide—a new complex of N‐methylglycine
Authors: Trzebiatowska‐Gusowska Monika , Ga̧gor Anna , Baran Jan , Drozd Marek 
Published: October 2008

AbstractWe obtained a new complex containing sarcosine (CH3NH2+CH2COO−) and barium(2 + ) dibromide (TSBB) in 3:1 molar ratio, as well as its deuterated analog. Single‐crystal X‐ray diffraction measurements show that TSBB crystallizes in the monoclinic system, space group P2(1)/c. The unit cell parameters are as follows: a = 18.345(4) Å, b = 10.668(2) Å, c = 8.9212(18) Å, β = 91.86(3)°, and Z = 4. The structure was determined with final R1 = 0.0396 (for I > 2σI). The crystal possesses a pseudohexagonal symmetry down c axis showing the resemblance to the crystal structure of trissarcosine calcium chloride (TSCC). There are NHBr hydrogen bonds (HB) of six types. TSBB crystal undergoes a phase transition at 416 K (heating)–415 K (cooling) of continuous nature. The spectroscopic [Infrared (IR) and Raman] investigation of the crystal was performed at room temperature. The results are discussed with respect to the crystallographic data, as well as the results obtained for TSCC crystal. Copyright © 2008 John Wiley & Sons, Ltd.
Structural studies and Raman spectroscopy of forbidden zone boundary phonons in Ni‐doped ZnO ceramics
Authors: Yadav Harish Kumar , Sreenivas K. , Gupta Vinay , Katiyar R. S. 
Published: October 2008

AbstractWe present X‐ray diffraction and Raman spectroscopy studies of Ni‐doped ZnO (Zn1−xNixO, x = 0.0, 0.03, 0.06, and 0.10) ceramics prepared by solid‐state reaction technique. The presence of the secondary phase along with the wurtzite phase is observed in Ni‐doped ZnO samples. The E2(low) optical phonon mode is seen to be shifted to a lower wavenumber with Ni incorporation in ZnO and is explained on the basis of force‐constant variation of ZnO bond with Ni incorporation. A zone boundary phonon is observed in Ni‐doped samples at ∼130 cm−1 which is normally forbidden in the first‐order Raman scattering of ZnO. Antiferromagnetic ordering between Ni atoms via spin‐orbit mechanism at low temperatures (100 K) is held responsible for the observed zone boundary phonon. Copyright © 2008 John Wiley & Sons, Ltd.
Raman characterization before and after rapid thermal annealing of CeO2 thin films grown by rf sputtering on (111) Si
Authors: Guhel Y. , Ta M. T. , Bernard J. , Boudart B. , Pesant J. C. 
Published: October 2008

AbstractWe investigated by Raman spectroscopy (RS) the crystalline quality of CeO2 thin films radio frequency magnetron sputtered on n‐type (111) Si substrates from CeO2 target. The deposition temperature was in the range of 200–800 °C. We also realized structural investigations on CeO2 layers after Rapid Thermal Annealing (RTA) performed in the range of 750–1000 °C for 30 s under nitrogen atmosphere. So this study displays that a high‐growth temperature and a high post‐growth‐RTA temperature improves the crystalline structure of the film.In fact, the best crystalline quality, which is close to the CeO2 target taken as a reference, is obtained for a CeO2 layer deposited at 800 °C and post‐annealed at 1000 °C for 30 s. Copyright © 2008 John Wiley & Sons, Ltd.
Fast adsorption and separation of bovine serum albumin and lysozyme using micrometer‐sized macromesoporous silica spheres
Authors: Zhai Zheng , Wang Yujun , Chen Yang , Luo Guangsheng 
Published: October 2008

AbstractMicrometer‐sized silica spheres with bimodal macromesoporous structures are synthesized continuously by a modified gelation technology, and a novel coaxial microfluidic device is applied to control the size of the silica spheres. These spheres are used as a new protein adsorbent to realize fast adsorption and separation of protein mixture. BSA and lysozyme (LYS) are as model proteins with different sizes and pIs. High protein adsorption capacity and rapid adsorption rate have been achieved. Fast separation of a binary mixture of BSA and LYS through a short packed column (50 mm×4.6 mm id) has also been successfully realized. LYS was selectively adsorbed while BSA flowed through the column in 12 s at a flow rate of up to 5.0 mL/min. As a result, an ultrafast adsorption and separation of BSA and LYS was obtained, showing great potential for applications in fast, large‐scale protein separation processes of these monodispersed silica spheres.
A novel HS‐SBSE system coupled with gas chromatography and mass spectrometry for the analysis of organochlorine pesticides in water samples
Authors: Grossi Paula , Olivares Igor R. B. , de Freitas Diego R. , Lancas Fernando M. 
Published: October 2008

AbstractA methodology to analyze organochlorine pesticides (OCPs) in water samples has been accomplished by using headspace stir bar sorptive extraction (HS‐SBSE). The bars were in house coated with a thick film of PDMS in order to properly work in the headspace mode. Sampling was done by a novel HS‐SBSE system whereas the analysis was performed by capillary GC coupled mass spectrometric detection (HS‐SBSE‐GC‐MS). The extraction optimization, using different experimental parameters has been established by a standard equilibrium time of 120 min at 85°C. A mixture of ACN/toluene as back extraction solvent promoted a good performance to remove the OCPs sorbed in the bar. Reproducibility between 2.1 and 14.8% and linearity between 0.96 and 1.0 were obtained for pesticides spiked in a linear range between 5 and 17 ng/g in water samples during the bar evaluation.
Influence of galvannealed process on coating corrosion resistance of high strength IF steel
Authors: Xiaodong Hao , Binkai Chen , Wugang Yu , Qifu Zhang 
Published: October 2008

AbstractAnalyzing the influence of different galvannealed process parameters on coating corrosion resistance of high strength IF steel indicated that corrosion resistance rose with the increase in iron content. Corrosion resistance was related to the phase structure of coating and the fraction of different phases. The appearance of compact Γ1phase indicated the great increase in coating corrosion resistance. At the same galvannealed time, coating corrosion resistance became better with the increase in the galvannealed temperature.
X‐Ray photoelectron spectroscopic investigations of powder coated steel
Authors: Hallmeier K. H. , Gehrke J. 
Published: October 2008

AbstractPolyester powder coatings are used for corrosion protection of different materials. XPS studies were performed in order to characterize such coatings on steel surfaces as a pre‐treatment for following applications like gluing. Different surface treatments by alkaline cleaner, plasma treatment (Plasma Treat® process), and the use of a silicoater (Pyrosil® process) were investigated. In dependence of such treatments, the resulting surfaces are found to be hydrophilic or hydrophobic. Although this behavior can also be investigated by contact‐angle measurements, the aim of our work is the element‐specific characterization of chemical bonding states (speciation).
A comparative study on the corrosion behavior of NdFeB magnets in different electrolyte solutions
Authors: Song Y. W. , Zhang H. , Yang H. X. , Song Z. L. 
Published: October 2008

AbstractSintered NdFeB magnets possess excellent magnetic properties. However, the corrosion resistance property of NdFeB is very poor due to its multiphase microstructure consisting of matrix phase Nd2Fe14B, Nd‐rich phase, and B‐rich phase. The corrosion behavior of NdFeB magnets in sodium hydroxide (NaOH), sodium chloride (NaCl), nitric acid (HNO3), and oxalic acid (H2C2O4) solutions was investigated by immersion and electrochemical tests. HNO3is the strongest corrosive electrolyte compared with the other three solutions. The increase in HNO3concentration can accelerate the corrosion of NdFeB magnets. NaCl belongs to medium corrosion electrolyte. A NaCl concentration of 0.5 M shows the severest corrosive feature in comparison with other concentrations of NaCl solution. NdFeB hardly suffers corrosion in NaOH and H2C2O4solutions owing to the formation of passivation films on the surface of magnets. Based on the corrosion behavior of NdFeB in different electrolytes, the possible corrosion mechanisms are discussed.
Interactions of Ionic Liquids with Polysaccharides – 7: Thermal Stability of Cellulose in Ionic Liquids and N‐Methylmorpholine‐N‐oxide
Authors: Dorn Susann , Wendler Frank , Meister Frank , Heinze Thomas 
Published: October 2008

AbstractThe thermal behavior of cellulose dissolved in ionic liquids was studied in comparison to NMMO solutions. The cellulose solutions were characterized by reaction calorimetry and UV‐vis spectroscopy. Generation of chromophoric substances in cellulose/IL solutions is minimized by exposing to temperatures of above 100 °C for longer time periods. Dynamic calorimetric investigations revealed first thermal activities above 180 °C applying EMIMac and above 200 °C for BMIMCl and five other ILs tested. Moreover, even in the case of modified cellulose/IL solutions, e.g., activated charcoal, only a slight decline of onset temperatures was registered compared to modified cellulose/NMMO solutions.magnified image
A convolution for the Hankel–Kontorovich–Lebedev transformation
Authors: Gutiérrez–Tovar Y. E. , Méndez–Pérez J. M. R. 
Published: October 2008

AbstractThe analysis of a kernel involving the product of three Bessel functions motivates the introduction of the translation operator and the convolution associated to the Hankel–Kontorovich–Lebedev tranformation, first in a classical framework, and then in certain spaces of generalized functions. The main properties of this convolution are investigated, the more important operational rules are obtained and some applications are shown. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Carleson measures and conformal self‐mappings in the real unit ball
Authors: Kotilainen Marko , Latvala Visa , Rättyä Jouni 
Published: October 2008

AbstractBounded and compact Carleson measures in the unit ball Bof Rn , n ≥ 2, are characterized by means of global Dirichlet integrals of the conformal self‐map Ta taking a ∈ B to the origin. The same proof applies in the unit ball of Cn . It is also proved that the powers of the Jacobian of Ta satisfy the weak Harnack inequality and even Harnack's inequality with a constant independent of a. As an application of these results it is shown that the two different definitions for Carleson measures in the existing literature are equivalent for a certain range of parameter values. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Relating transplantation and multipliers for Dunkl and Hankel transforms
Authors: Nowak Adam , Stempak Krzysztof 
Published: October 2008

AbstractBy expressing the Dunkl transform of order α of a function f in terms of the Hankel transforms of orders α and α + 1 of even and odd parts of f, respectively, we show that a considerable part of harmonic analysis of the Dunkl transform on the real line may be reduced to known results for the Hankel transform. In particular, defining the modified Dunkl transform and then considering the Dunkl transplantation operator we transfer known multiplier results for the Hankel transform to the Dunkl transform setting. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
An equivalence for weighted integrals of an analytic function and ist derivative
Authors: Pavlović Miroslav , Peláez José Ángel 
Published: October 2008

AbstractIn this paper we introduce the class of differentiable weights ω in the unit disc 𝔻 such that
equation image
where L is a positive constant.The main result in this paper asserts that if ω is one of these weights, then the equivalence
equation image
holds for all 0 < p < ∞, 0 < q ≤ ∞and f an analytic function in 𝔻. Our results improve others due to Aleman, Siskakis, and Stević.We also prove two results on harmonic conjugate functions. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Nonoscillation criteria for second‐order nonlinear differential equations with decaying coefficients
Authors: Sugie Jitsuro 
Published: October 2008

AbstractThis paper is concerned with the problem of deciding conditions on the coefficient q (t) and the nonlinear term g (x) which ensure that all nontrivial solutions of the equation (|x ′|α–1x ′)′ + q (t)g (x) = 0, α > 0, are nonoscillatory. The nonlinear term g (x) is not imposed no assumption except for the continuity and the sign condition xg (x) > 0 if x ≠ 0. In our problem, it is important to examine the relation between the decay of q (t) and the growth of g (x). Our main result extends some nonoscillation theorem for the generalised Emden–Fowler equation. Proof is given by means of some Liapunov functions and phase‐plane analysis. A simple example is includes to show that the monotonicity of g (x) is not essential in our problem. Finally, elliptic equations with the m ‐Laplacian operator are discussed as an application to our results. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Interval oscillation criteria for linear Hamiltonian systems
Authors: Zheng Zhaowen 
Published: October 2008

AbstractIn this paper some new oscillation criteria of interval type for linear matrix Hamiltonian systems are established which are different from most known ones in the sense that they are based on the information only on a sequence of subinterval of [t0, ∞) rather than on the whole half line. Our results are shaper than previous results. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
One‐sided operators inLp(x)spaces
Authors: Edmunds David E. , Kokilashvili Vakhtang , Meskhi Alexander 
Published: October 2008

AbstractBoundedness of one‐sided maximal functions, singular integrals and potentials is established inL(I) spaces, whereIis an interval inR. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
A Novel Route to Organic–Inorganic Hybrid Nanomaterials
Authors: Radhakrishnan Bindushree , Constable Andrew N. , Brittain William J. 
Published: October 2008

AbstractThe in situ formation of functionalized silica nanoparticles is reported. The reactive stabilizers used in the study, [3‐(2‐bromoisobutyryl)propyl]triethoxysilane and [3‐(2‐bromoisobutyryl)propyl]ethoxydimethylsilane, have an atom transfer radical polymerization (ATRP) initiator at the noncondensable end. Condensation with tetraethoxysilane yields silica nanoparticles with a surface‐immobilized initiator. The size of these functionalized silica nanoparticles can be controlled by varying the time of initiator addition and initiator concentration. The silica particle sizes ranged from 10 to 300 nm. With the initiator functionalized silica nanoparticles, ATRP synthesis was performed with styrene, tert‐butyl acrylate, and methyl acrylate to produce organic–inorganic nanomaterials.magnified image