bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cytokines and Growth Factors Involved in the Osseointegration of Oral Titanium Implants Positioned Using Piezoelectric Bone Surgery Versus a Drill Technique: A Pilot Study in Minipigs
Authors: Preti Giulio , Martinasso Germana , Peirone Bruno , Navone Roberto , Manzella Carlo , Muzio Giuliana , Russo Crescenzo , Canuto Rosa A. , Schierano Gianmario 
Published: April 2007

Background: Most dental implants are positioned using a drilling surgery technique. However, dentistry recently experienced the implementation of piezoelectric surgery. This technique was introduced to overcome some of the limitations involving rotating instruments in bone surgery. This study used biomolecular and histologic analyses to compare the osseointegration of porous implants positioned using traditional drills versus the piezoelectric bone surgery technique.Methods: Porous titanium implants were inserted into minipig tibias. Histomorphology and levels of bone morphogenetic protein (BMP)‐4, transforming growth factor (TGF)‐β2, tumor necrosis factor‐alpha, and interleukin‐1β and ‐10 were evaluated in the peri‐implant osseous samples.Results: Histomorphological analyses demonstrated that more inflammatory cells were present in samples from drilled sites. Also, neo‐osteogenesis was consistently more active in bone samples from the implant sites that were prepared using piezoelectric bone surgery. Moreover, bone around the implants treated with the piezoelectric bone surgery technique showed an earlier increase in BMP‐4 and TGF‐β2 proteins as well as a reduction in proinflammatory cytokines.Conclusion: Piezoelectric bone surgery appears to be more efficient in the first phases of bone healing; it induced an earlier increase in BMPs, controlled the inflammatory process better, and stimulated bone remodeling as early as 56 days post‐treatment.
Learning from maps: the role of visuo‐spatial working memory
Authors: Coluccia Emanuele 
Published: April 2007

AbstractThe involvement of visuo‐spatial working memory (VSWM) in map learning was tested. While learning a map, participants were asked either to perform or abstain from a secondary interference task. Learning of the map was assessed by means of three different tasks (landmark positioning, pointing, route finding), each tapping a different type of spatial knowledge, namely, relative position knowledge, absolute position knowledge and route knowledge. Results showed that VSWM supports learning of absolute landmark positions but not learning of relative landmark positions. Moreover, VSWM appears to be involved in route learning. Copyright © 2007 John Wiley & Sons, Ltd.
Semi‐Solid Processing of Tailored Aluminium‐Lithium Alloys for Automotive Applications
Authors: Sauermann R. , Friedrich B. , Bünck M. , Bührig‐Polaczek A. , Uggowitzer P. J. 
Published: April 2007

AbstractThis paper describes the development and evaluation of thixoformable Al‐Li‐Mg‐based alloys performed at the collaborative research center SFB 289, RWTH Aachen. Scandium and zirconium were added to AlLi2.1Mg5.5 (A1420) with the aid of DoE (Design of Experiments), and precursor billets were manufactured by pressure induction melting (PIM). To evaluate the thixoformability of the synthesized alloys semi‐solid processed connecting rods were manufactured by the rheo container process (RCP). Subsequent heat treatment raised the mechanical properties to maximum values of tensile strength, 430 MPa, yield strength of 250 MPa, and an elongation to fracture of 13 %. The RCP process was designed for the special requirements of highly reactive alloys. The paper presents the remarkable property and process benefits of the semi‐solid processing of Al‐Li alloys.
Spectrophotometric Simultaneous Determination of Manganese(II) and Iron(II) in Pharmaceutical by Orthogonal Signal Correction‐Partial Least Squares
Authors: Goodarzi Mohammad , Goodarzi Tahmine , Ghasemi Nahid 
Published: April 2007

AbstractThe simultaneous determination of manganese(II) and iron(II) mixtures by using spectrophotometric methods is a difficult problem in analytical chemistry, due to spectral interferences. By multivariate calibration methods, such as partial least squares (PLS), it is possible to obtain a model adjusted to the concentration values of the mixtures used in the calibration range. Orthogonal signal correction (OSC) is a preprocessing technique used to remove the information unrelated to the target variables based on constrained principal component analysis. OSC is a suitable preprocessing method for partial least squares calibration of mixtures without loss of prediction capacity using spectrophotometric method. In this study, the calibration model is based on absorption spectra in the 450‐600 nm range for 21 different mixtures of manganese(II) and iron(II). Calibration matrices were containing 0.05‐1.2 and 0.1‐2.3 μg mL‐1 Mn(II) and Fe(II), respectively. The RMSEP for manganese(II) and iron(II) with OSC and without OSC were 0.0316, 0.0291, and 0.0907, 0.115, respectively. This procedure allows the simultaneous determination of manganese(II) and iron(II) in synthetic and real matrix samples with good reliability of the determination.
Preparation of Aminylferrocene/Nanogold Modified Glassy Carbon Electrode and its Electrocatalysis on Dopamine
Authors: Wang Cong , Wang Guangfeng , Jiao Shoufeng , Guo Zhihua , Fang Bin 
Published: April 2007

AbstractAminylferrocene(FcAI)‐Nanogold(NG) modified glassy carbon electrode (FcAI/NG/GCE) was prepared by the Au‐N bond between Au and FcAI. Electrochemical impedance spectroscopy (EIS) was employed to study the surface of the modified electrode. The electrochemical behavior of dopamine (DA) on the modified electrode was investigated and it was found that the modified electrode had an obvious electrocatalytic effect on DA. Compared with a bare GCE, the modified electrode exhibited an apparent shift of the oxidation peak potential in the negative potential direction and a marked enhancement in the current response for DA. We investigated the determination of DA on the modified electrode by differential pulse voltammetry (DPV). Linear calibration curve was obtained in the range of 7.0×10‐7 mol/L to 6×10‐4 mol/L of DA in 0.1mol/L phosphate buffer solution (pH= 7.0) with a correlation coefficient of 0.9989. The detection limit (S/N=3) of DA was estimated to be 1.0×10‐7 mol/L. Especially, by using the modified electrode, we can separate the oxidation peaks of ascorbic acid (AA) and DA in the PBS and it was satisfactory for the determination of DA with the interference of AA.
Collagen turnover in the adult femoral mid‐shaft: Modeled from anthropogenic radiocarbon tracer measurements
Authors: Hedges Robert E.M. , Clement John G. , Thomas C. David L. , O'Connell Tamsin C. 
Published: April 2007

AbstractWe have measured the 14C content of human femoral mid‐shaft collagen to determine the dynamics of adult collagen turnover, using the sudden doubling and subsequent slow relaxation of global atmospheric 14C content due to nuclear bomb testing in the 1960s and 1970s as a tracer. 14C measurements were made on bone collagen from 67 individuals of both sexes who died in Australia in 1990‐1993, spanning a range of ages at death from 40 to 97, and these measurements were compared with values predicted by an age‐dependent turnover model. We found that the dataset could constrain models of collagen turnover, with the following outcomes: 1) Collagen turnover rate of females decreases, on average, from 4%/yr to 3%/yr from 20 to 80 years. Male collagen turnover rates average 1.5–3%/yr over the same period. 2) For both sexes the collagen turnover rate during adolescent growth is much higher (5–15%/yr at age 10–15 years), with males having a significantly higher turnover rate than have females, by up to a factor of 2. 3) Much of the variation in residual bomb 14C in a person's bone can be attributed to individual variation in turnover rate, but of no more than about 30% of the average values for adults. 4) Human femoral bone collagen isotopically reflects an individual's diet over a much longer period of time than 10 years, including a substantial portion of collagen synthesised during adolescence Am J Phys Anthropol, 2007. © 2007 Wiley‐Liss, Inc.
Three characteristic reactions of organocobalt compounds in organic synthesis
Authors: Omae Iwao 
Published: April 2007

AbstractOrganocobalt compounds in organic synthesis have three characteristic reactions. The first occurs because cobalt has a high affinity to carbon–carbon π‐bonds or carbon–nitrogen π‐bonds. The second occurs because cobalt has a high affinity to carbonyl groups. The third is due to cobalt easily tending to form square‐planar bipyramidal six‐coordination structures with four nitrogen atoms or two nitrogen atoms and two oxygen atoms at the square‐planar position, and to bond with one or two carbon atoms at the axial position. The first characteristic reactions are the representative reactions of organocobalt compounds with a mutually bridged bond between the two π‐bonds of acetylene and the cobalt–cobalt bond of hexacarbonyldicobalt. These are reactions with a Co2(CO)6 protecting group to reactive acetylene bond, the Nicholas reactions, the Pauson–Khand reactions ([2 + 2 + 1] cyclizations), [2 + 2 + 2] cyclizations, etc. These reactions are applied for the syntheses of many kinds of pharmaceutically useful compounds. The second reactions are carbonylations that have been used or developed as industrial processes such as hydroformylation for the manufacture of isononylaldehyde, and carbonylation for the production of phenylacetic acid from benzyl chloride. The third reactions are those reactions with the B12‐type catalysts, and they have recently been used in organic syntheses and are utilized as catalysts for stereoselective syntheses. These reactions have been used as new applications for organic syntheses. Copyright © 2007 John Wiley & Sons, Ltd.
A new 3s–3d heterometallic polymer containing N‐methyliminodiacetic acid: synthesis, structure and characterization
Authors: Gao Feng‐Xian , Gu Wen , Qian Jing , Yang Yong‐Sheng , Yan Shi‐Ping 
Published: April 2007

AbstractA new complex {[Na2(H2O)3(µ‐L)2Cu]4}∞ (L = N‐methyliminodiacetic acid) has been synthesized and structurally characterized. The complex crystallizes in the monoclinic, space group C2/c, with the unit cell parameters a = 16.556(3) Å, b = 8.0622(13) Å, c = 12.671(2) Å, α = 90°, β = 95.849(2)°, γ = 90°. The central metal Cu (II) ion is coordinated with two nitrogen atoms and four oxygen atoms belonging to two ligands. Simultaneously, the sodium is six‐coordinated with oxygen atoms coming from the ligand and water molecule; the sodium atoms related are bridged by oxygen atoms, forming a sodium chain. The structure consists of CuL2 moieties linked by sodium chain via the exo oxygen atoms of two ligands, forming a novel three‐dimensional structure. Moreover, elemental analysis, IR, UV‐vis, ESR spectroscopy and thermal stability were determined. Copyright © 2007 John Wiley & Sons, Ltd.
Application of polycarboxylic acid sodium salt in the dyeing of cotton fabric with reactive dyes
Authors: Guan Yu , Zheng Qing‐kang , Mao Ya‐hong , Gui Ming‐sheng , Fu Hong‐bin 
Published: April 2007

AbstractIn this study, the effects of polycarboxylic acid sodium salt on the dyeing of cotton with reactive dyes were evaluated by measuring and comparing the K/S values and dyeing fastnesses of the dyed cotton fabric samples. Results showed that the K/S value and dyeing fastness of cotton fabrics dyed with polycarboxylic acid sodium salt, substituting inorganic salts as exhausting agent were close to that of with sodium chloride when dip‐dyeing process was used. While, in pad‐dry dyeing, the K/S value of cotton fabric samples dyed with polyacid salts as exhausting agent was higher than that of with sodium sulfate, and the dyeing fastnesses of these samples were nearly the same. The dyeing mechanism of cotton fabric with reactive dye, using polycarboxylic acid sodium salt as exhausting agent was analyzed. The dyeing exhausting mechanism of reactive dye seems different when the inorganic salt and polycarboxylic acid sodium salt were used as exhausting agent in the dyeing of cotton fabric with reactive dye. The polycarboxylic acid sodium salt, as weak electrolyte, increased the dye‐uptake of reactive dye on cotton fabric not only by screening negative charges on cotton surface, but also by the effect of salting‐out or hydrophobic combination. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
Maternal caffeine consumption and risk of cardiovascular malformations
Authors: Browne Marilyn L. , Bell Erin M. , Druschel Charlotte M. , Gensburg Lenore J. , Mitchell Allen A. , Lin Angela E. , Romitti Paul A. , Correa Adolfo 
Published: April 2007

AbstractBACKGROUND:The physiologic effects and common use of caffeine during pregnancy call for examination of maternal caffeine consumption and risk of birth defects. Epidemiologic studies have yielded mixed results, but such studies have grouped etiologically different defects and have not evaluated effect modification.METHODS:The large sample size and precise case classification of the National Birth Defects Prevention Study allowed us to examine caffeine consumption and specific cardiovascular malformation (CVM) case groups. We studied consumption of caffeinated coffee, tea, soda, and chocolate to estimate total caffeine intake and separately examined exposure to each caffeinated beverage. Smoking, alcohol, vasoactive medications, folic acid supplement use, and infant gender were evaluated for effect modification. Maternal interview reports for 4,196 CVM case infants overall and 3,957 control infants were analyzed.RESULTS:We did not identify any significant positive associations between maternal caffeine consumption and CVMs. For tetralogy of Fallot, nonsignificant elevations in risk were observed for moderate (but not high) caffeine intake overall and among nonsmokers (ORs of 1.3 to 1.5). Risk estimates for both smoking and consuming caffeine were less than the sum of the excess risks for each exposure. We observed an inverse trend between coffee intake and risk of atrial septal defect; however, this single significant pattern of association might have been a chance finding.CONCLUSIONS:Our study found no evidence for an appreciable teratogenic effect of caffeine with regard to CVMs. Birth Defects Research (Part A), 2007. © 2007 Wiley‐Liss, Inc.
Structural and Electronic Properties of Hetero‐Transition‐Metal Keggin Anions: A DFT Study of α/β‐[XW12O40]n‐ (X: CrVI, VV, TiIV, FeIII, CoIII, NiIII, CoII, and ZnII) Relative Stability.
Authors: Zhang Fu‐Qiang , Zhang Xian‐Ming , Wu Hai‐Shun , Jiao Haijun 
Published: April 2007

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, please click on HTML or PDF.
Orientational Disorder of [Mg(H2O)6] Octahedra in the Novel Magnesium Selenite Hydrate Mg(SeO3)×7.5H2O.
Authors: Fleck Michel 
Published: April 2007

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, please click on HTML or PDF.
Monoclinic Cu3(SeO3)2Cl2: An Oxohalide with an Unusual CuO4Cl Trigonal‐Bipyramidal Coordination.
Authors: Becker Richard , Berger Helmuth , Johnsson Mats 
Published: April 2007

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, please click on HTML or PDF.
The Structures and Optical Spectra of Hydrated Transplutonium Ions in the Solid State and in Solution.
Authors: Lindqvist‐Reis Patric , Apostolidis Christos , Rebizant Jean , Morgenstern Alfred , Klenze Reinhardt , Walter Olaf , Fanghaenel Thomas , Haire Richard G. 
Published: April 2007

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, please click on HTML or PDF.
Stacking Design of Inverse Perovskites: The Systems (Sr3‐xBaxN)E, E: Bi, Sb.
Authors: Gaebler Frank , Niewa Rainer 
Published: April 2007

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, please click on HTML or PDF.
Co‐Doped CoxCu6‐xSn5 Alloys as Negative Electrode Materials for Rechargeable Lithium Batteries.
Authors: Zhang Jing‐jun , Zhang Xiao , Xia Yong‐yao 
Published: April 2007

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, please click on HTML or PDF.
Morphological and Kinetic Studies on Hexagonal Tungstates.
Authors: Michailovski Alexej , Kiebach Ragnar , Bensch Wolfgang , Grunwaldt Jan‐Dierk , Baiker Alfons , Komarneni Sridhar , Patzke Greta R. 
Published: April 2007

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, please click on HTML or PDF.
Synthesis of Hexagonal BaTa2O6 Nanorods and Influence of Defects on the Photocatalytic Activity.
Authors: Xu Tongguang , Zhao Xu , Zhu Yongfa 
Published: April 2007

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, please click on HTML or PDF.
Cs+‐Selective Ion Exchange and Magnetic Ordering in a Three‐Dimensional Framework Uranyl Vanadium(IV) Phosphate.
Authors: Shvareva Tatiana Y. , Skanthakumar S. , Soderholm L. , Clearfield Abraham , Albrechts‐Schmitt Thomas E. 
Published: April 2007

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, please click on HTML or PDF.
Square‐Planar Noble Metal Iodate [M(IO3)4]n‐ (M = PdII, AuIII; n = 2, 1) Anions and Their Ability to Form Polar and Centrosymmetric Architectures.
Authors: Ling Jie , Albrecht‐Schmitt Thomas E. 
Published: April 2007

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, please click on HTML or PDF.
Benzimidazole‐pyrrolidine/H+ (BIP/H+), a Highly Reactive Organocatalyst for Asymmetric Processes.
Authors: Lacoste Eric , Vaique Emilie , Berlande Muriel , Pianet Isabelle , Vincent Jean‐Marc Vincent Jean‐Marc , Landais Yannick 
Published: April 2007

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, please click on HTML or PDF.
Recyclization of 7‐Fluoroalkyl‐4,7‐dihydroazolo[5,1‐c][1,2,4]triazines into 5‐(Pyrazolinylhydrazono)azoles in the Reactions with Hydrazides and Thiosemicarbazide.
Authors: Khudina Olga G. , Shchegol'kov Evgeny V. , Burgart Yanina V. , Kodess Mikhail I. , Saloutin Victor I. , Chupakhin Oleg N. 
Published: April 2007

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, please click on HTML or PDF.
New Route for the Synthesis of Pyrazole, Triazole, Triazine, and Triazepine Derivatives.
Authors: Omran O. A. , Amer A. A. , Khodairy A. 
Published: April 2007

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, please click on HTML or PDF.
Remarkable Enhancement of Photoallylation of Aromatic Carbonyl Compounds with a Hypervalent Allylsilicon Reagent by Donor Molecules.
Authors: Nishigaichi Yutaka , Suzuki Akira , Takuwa Akio 
Published: April 2007

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, please click on HTML or PDF.
Lewis Acid Catalyzed Enantioselective Hydroxylation Reactions of Oxindoles and β‐Keto Esters Using DBFOX Ligand.
Authors: Ishimaru Takehisa , Shibata Norio , Nagai Jun , Nakamura Shuichi , Toru Takeshi , Kanemasa Shuji 
Published: April 2007

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, please click on HTML or PDF.
An Efficient Base‐Free N‐Arylation of Imidazoles and Amines with Arylboronic Acids Using Copper‐Exchanged Fluorapatite.
Authors: Kantam M. Lakshmi , Venkanna Gopaldasu T. , Sridhar Chidara , Sreedhar Bojja , Choudary Boyapati M. 
Published: April 2007

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, please click on HTML or PDF.
Organocatalytic Asymmetric Michael Addition of Aldehydes to β‐Nitroacrolein Dimethyl Acetal.
Authors: Reyes Efraim , Vicario Jose L. , Badia Dolores , Carrillo Luisa 
Published: April 2007

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, please click on HTML or PDF.
An Asymmetric Synthesis of the β‐Hydroxy Acid Segment of Hapalosin.
Authors: Sharma Anubha , Roy Siddharth , Goswami Dibakar , Chattopadhyay Angshuman , Chattopadhyay Subrata 
Published: April 2007

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, please click on HTML or PDF.
Proline‐Promoted Synthesis of Ring‐Fused Homodimers: Self‐Condensation of α,β‐Unsaturated Aldehydes.
Authors: Bench Bennie J. , Liu Chaomin , Evett Colin R. , Watanabe Coran M. H. 
Published: April 2007

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, please click on HTML or PDF.
Ring Closing Metathesis/Fragmentation Route to (Z)‐Configured Medium Ring Cycloalkenes. Total Synthesis of (.+‐.)‐Periplanone C.
Authors: Matovic Radomir , Ivkovic Aleksandar , Manojlovic Marija , Tokic‐Vujosevic Zorana , Saicic Radomir N. 
Published: April 2007

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, please click on HTML or PDF.
Organocatalyzed Highly Enantioselective Direct Aldol Reactions of Aldehydes with Hydroxyacetone and Fluoroacetone in Aqueous Media: The Use of Water to Control Regioselectivity.
Authors: Chen Xiao‐Hua , Luo Shi‐Wei , Tang Zhuo , Cun Lin‐Feng , Mi Ai Qiao , Jiang Yao‐Zhong , Gong Liu‐Zhu 
Published: April 2007

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, please click on HTML or PDF.
Vanadium‐Catalyzed Selective Aerobic Alcohol Oxidation in Ionic Liquid [bmim]PF6.
Authors: Jiang Nan , Ragauskas Arthur J. 
Published: April 2007

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, please click on HTML or PDF.
The Direct Introduction of Carbonates α to Carbonyl Groups.
Authors: Hall Adrian , Jones Kerri L. , Jones Teyrnon C. , Killeen Niall M. , Poerzig Robert , Taylor Paul H. , Yau Sze Chak , Tomkinson Nicholas C. O. 
Published: April 2007

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, please click on HTML or PDF.