bluuebunny/crossref_metadata_2025_split huggingface dataset:
Bioremoval of Cadmium by Lemna minor in Different Aquatic Conditions
Authors: Uysal Yagmur , Taner Fadime 
Published: April 2010

AbstractThis study was undertaken to determine the cadmium removal efficiency of Lemna minor when it was used for treatment of wastewater having different characteristics, i. e., pH, temperature and cadmium concentration. Plants were cultivated in different pH solutions (4.5–8.0) and temperatures (15–35°C) in the presence of cadmium (0.1–10.0 mg/L) for 168 h. The amount of biomass obtained in the study period, the concentrations of cadmium in the tissues and in the media and net uptake of cadmium by Lemna have been determined for each condition. The percentages of cadmium uptake (PMU) and bioconcentration factors (BCF) were also calculated. The highest accumulation was obtained for the highest cadmium concentration of 10.0 mg Cd/L as 11.668 mg Cd/g at pH 6.0, and as 38.650 mg Cd/g at 35°C and pH 5.0. The cadmium accumulation gradually increased with initial concentration of the medium, but the opposite trend was observed for the PMU. However, the maximum PMU was obtained as 52.2% in the solution with the lowest concentration of 0.1 mg Cd/L. A mathematical model was used to describe the cadmium uptake and the equation obtained was seen to fit the experimental data very well.
Phosphorus Buildup and Release Risk Associated with Agricultural Intensification in the Estuarine Sediments of Chaohu Lake Valley, Eastern China
Authors: Tang Wenzhong , Shan Baoqing , Zhang Hong 
Published: April 2010

AbstractPhosphorus (P) accumulation and the risk of P release were studied in the estuarine sediments of the Chaohu Lake Valley in Eastern China. Rapid agricultural intensification has occurred in this area since the 1980s, resulting in the extensive use of phosphate fertilizers. This extensive use of phosphate has affected P processes throughout the valley and resulted in the total phosphorus (TP) contents in the substrates and surface sediments increasing from 374 to 537 mg/kg, on average. Of all the forms of P evaluated in this study, residual P (Res‐P) was present at the highest levels and accounted for 19.8–74.0% of the TP. Conversely, the lowest contents were observed for KCl‐extracted P (KCl‐P), which accounted for only 0.602% of the TP. Additionally, aluminum/iron‐bound P (NaOH‐Pi), which accounted for 16.0–53.1% of the TP, was an important factor that caused the TP to increase due to long‐term P fertilization. However, calcium‐bound P (Ca‐P) was maintained at a relatively stable level. Furthermore, the degree of P saturation (DPS) and the P‐induced lake eutrophication risk index (ERI) were investigated to determine the risk of release of P from the sediments. The average DPS and ERI values were found to range from 3.92–21.4% and from 12.6–33.6%, respectively. These results suggest that almost half of the estuarine sediments posed a potential risk of eutrophication. Moreover, these findings indicate that estuarine sediments that have been enriched with P are likely the sources of P that lead to the formation of algal blooms in Chaohu Lake.
Determination of Copper in Water Samples after Solid‐phase Extraction Using Dimethylglyoxime‐modified Silica
Authors: Anilan Burcu , Gedikbey Tevfik , Tunali Akar Sibel 
Published: April 2010

AbstractThis work describes the modification of silica gel with dimethylglyoxime, in order to prepare an effective sorbent for the preconcentration and determination of copper. The sorption capacity of dimethylglyoxime‐modified silica‐gel (DMGMS) was 71.37 mg g–1 and the optimum pH for the quantitative recovery of copper was found to be 5.0. The optimum flow rate, sorbent amount, and sample volume were 1 mL min–1, 300 mg, and 50 mL, respectively. 10 mL of 0.1 mol L–1 HCl was the most suitable eluent. The detection limit of copper was 6.0 ng mL–1. The recommended method, for the determination of copper, is simple and reliable, without any notable matrix effect and can be successfully applied to environmental water samples. Copper recovery in the range from 99–100% was obtained from seawater and thermal spring water using this method. The method was applied to standard reference materials, NIST‐1515 (apple leaves) and NIST‐1643e (simulated fresh water), for the determination of copper and the results were in good agreement with certified values.
Separation and Preconcentration of Boron with a Glucamine Modified Novel Magnetic Sorbent
Authors: Tural Bilsen 
Published: April 2010

AbstractA novel, simple method based on magnetic separation was developed for analytical purposes. In this method, N‐methyl‐D‐glucamine (NMDG) modified magnetic microparticles that were synthesized by using the sol‐gel method were used for the selective extraction and preconcentration of boron from aqueous solutions. This method combines the simplicity and selectivity of solvent extraction with the easy separation of magnetic microparticles from a solution with a magnet without any preliminary filtration step. The structure of the prepared γ‐Fe2O3‐SiO2‐NMDG (magnetic sorbent) composites were characterized by using X‐ray diffraction (XRD), Transmission Electron Microscopy (TEM), and Fourier Transform Infrared Spectroscopy (FTIR). The influence of different parameters on the sorbent capacity, such as the sorption/desorption of boron, magnetic sorbent dosage, pH, equilibrium time, type, and amount of stripping solution, were evaluated by using the magnetic sorbent. Any equilibrium pH greater than 6 can be used for sorption. Desorption from the sorbent was carried out by using 1.0 M HCl. The sorption and desorption efficiency of the γ‐Fe2O3‐SiO2‐NMDG was found as 92.5 ± 0.5% and 99.8 ± 6%, respectively.
Substrate Registry in Disordered Layers of Large Molecules
Authors: Waldmann Thomas , Reichert Robert , Hoster Harry E. 
Published: April 2010

AbstractWe present a statistic evaluation of the azimuth orientations of flat‐adsorbed oligopyridine molecules in disordered adlayers on Au(111) and (111) oriented Ag‐adlayers on Ru(0001). On both surfaces, we find a strong preference for a set of twelve angles, which belong to one specific, unsymmetrical alignment and its symmetry equivalents. These angles are also those that exclusively occur in more densely packed, ordered structures on the same surfaces. We describe a geometric fitting algorithm, which correctly predicts these angles, and which only requires the substrate lattice and the positions of the nitrogen atoms within the flat‐adsorbed molecule as input parameters. Such predictions are particularly valuable to reduce the parameter space in structure simulations [C. Rohr, M. Balbás Gambra, K. Gruber, E. C. Constable, E. Frey, T. Franosch, B. A. Hermann, Nano Lett. 2009, 10, 833].
Vapour‐phase growth, purification and large‐area deposition of ZnO tetrapod nanostructures
Authors: Zanotti L. , Calestani D. , Villani M. , Zha M. , Zappettini A. , Paorici C. 
Published: April 2010

AbstractLarge‐yield zinc oxide (ZnO) nanosized tetrapods have been obtained by a standard vapour‐phase growth technique to which a few modifications have been added, such as the separation of the Zn source evaporation region from the Zn oxidation region inside the reactor setup. This modification allows to keep the growth conditions constant and continuous for a long time, thus favouring the obtainment of large amounts of ZnO tetrapod nanostructures. As some contaminations usually occur due to metallic Zn particles and/or different ZnO nanostructures, including not completely reacted ZnO1‐x solid phases, they can be removed by a three‐step “purification” procedure as described in the article. Further to that, a deposition method from suitable liquid suspensions is also reported, which allows to produce homogeneous distributions of ZnO tetrapods on large substrate areas. The proposed procedures are expected to be particularly appropriate for a large production of samples for device use. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Ionic liquid‐assisted hydrothermal synthesis of γ‐Al2O3hierarchical nanostructures
Authors: Kim Tongil , Li Haobo , Lian Jiabiao , Jin Huaihai , Ma Jianmin , Duan Xiaochuan , Yao Gang , Zheng Wenjun 
Published: April 2010

AbstractThe boehmite (Al2O3·H2O) hierarchical nanostructure with spindle‐like morphology has been successfully synthesized via ionic liquid‐assisted hydrothermal synthetic method under mild condition using an ionic liquid 1‐butyl‐3‐dimethylimidazolium bromide ([Bmim][Br]) as a template. The proposed formation mechanism has been investigated and the hydrogen bond‐co‐π–π stack mechanism is used to be responsible for the present formation of the precursor hierarchical nanostructure. The γ‐Al2O3 hierarchical nanostructure was obtained by calcining the as‐synthesized precursor at 500 °C for 2 h, preserving the same morphology. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Methodology significantly affects genome size estimates: Quantitative evidence using bryophytes
Authors: Bainard Jillian D. , Fazekas Aron J. , Newmaster Steven G. 
Published: April 2010

AbstractFlow cytometry (FCM) is commonly used to determine plant genome size estimates. Methodology has improved and changed during the past three decades, and researchers are encouraged to optimize protocols for their specific application. However, this step is typically omitted or undescribed in the current plant genome size literature, and this omission could have serious consequences for the genome size estimates obtained. Using four bryophyte species (Brachythecium velutinum, Fissidens taxifolius, Hedwigia ciliata, and Thuidium minutulum), three methodological approaches to the use of FCM in plant genome size estimation were tested. These included nine different buffers (Baranyi's, de Laat's, Galbraith's, General Purpose, LB01, MgSO4, Otto's, Tris.MgCl2, and Woody Plant), seven propidium iodide (PI) staining periods (5, 10, 15, 20, 45, 60, and 120 min), and six PI concentrations (10, 25, 50, 100, 150, and 200 μg ml−1). Buffer, staining period and staining concentration all had a statistically significant effect (P = 0.05) on the genome size estimates obtained for all four species. Buffer choice and PI concentration had the greatest effect, altering the 1C‐values by as much as 8% and 14%, respectively. As well, the quality of the data varied with the different methodology used. Using the methodology determined to be the most accurate in this study (LB01 buffer and PI staining for 20 min at 150 μg ml−1), three new genome size estimates were obtained: B. velutinum: 0.46pg, H. ciliata: 0.30pg, and T. minutulum: 0.46pg. While the peak quality of flow cytometry histograms is important, researchers must consider that changes in methodology can also affect the relative peak positions and therefore the genome size estimates obtained for plants using FCM. © 2010 International Society for Advancement of Cytometry
College students' perceptions of individuals with anorexia and bulimia nervosa
Authors: Wingfield Natalie , Kelly Nichole , Serdar Kasey , Shivy Victoria A. , Mazzeo Suzanne E. 
Published: April 2010

AbstractObjective:Eating disorders (EDs) are highly stigmatized conditions. This study explored factors hypothesized to influence this stigmatization including ethnicity, gender, ED subtype, and proposed etiology.Method:Undergraduates (N = 235) read scenarios depicting fictional characters varying on ethnicity, gender ED subtype, and etiology. Participants reported perceptions of each character, and completed the EAT‐26 and the Level‐of‐Contact scale.Results:Characters with BN were viewed as more responsible for their ED and more self‐destructive than those with AN, who were viewed as more self‐controlled. Characters with a sociocultural etiology were rated as most likely to recover. Characters with a biological etiology were viewed as more likeable than characters with an ambiguous etiology. Characters in the ambiguous group were viewed as more self‐destructive, more responsible for their ED, and less self‐controlled. Differences in participants' perceptions of the characters also emerged when examining ethnicity and gender. Finally, participants' own ED symptoms and their level of contact with EDs were associated with viewing characters as more similar and self‐controlled.Discussion:Findings highlight the need for increased education about ED etiology and course. © 2010 by Wiley Periodicals, Inc. (Int J Eat Disord 2011; 44:369–375)
Ab Initio Investigation of Spectroscopic Parameters for CrX63–: The Unexpected Role of Bond Length Variation – Size Really Matters
Authors: Bolvin Hélène 
Published: April 2010

AbstractLigand field states were calculated in the CrX63– series with X = F, Cl, Br, and I from first principles, and the ligand field parameter, Δ, was deduced. The decrease in Δ follows the spectrochemical series; π effects are usually invoked to justify this trend. It is shown that while the covalence increases, the π effect decreases and that the key role in the decrease in Δ is played by the increase in bond length in the halide series.
Perfluoroisopropyl Zinc Phthalocyanines Conjugated with Deoxyribonucleosides: Synthesis, Photophysical Properties and In Vitro Photodynamic Activities
Authors: Das Banibrata , Tokunaga Etsuko , Tanaka Motohiro , Sasaki Takuma , Shibata Norio 
Published: April 2010

AbstractPerfluoroisopropyl‐substituted zinc phthalocyanines conjugated with deoxyribonucleosides have been synthesized and evaluated as photodynamic therapy agents from both spectral and biological points of view. They show non‐aggregation, high chemical stability and good fluorescence quantum yields in both organic and aqueous solutions. Preliminary biological experiments revealed these conjugates to be promising candidates for the photodynamic therapy of cancer.
Synthesis, NMR, and Conformational Studies of Cyclic Oligo‐(1→6)‐β‐D‐Glucosamines (Eur. J. Org. Chem. 13/2010)
Authors: Gening Marina L. , Titov Denis V. , Grachev Alexey A. , Gerbst Alexey G. , Yudina Olga N. , Shashkov Alexander S. , Chizhov Alexander O. , Tsvetkov Yury E. , Nifantiev Nikolay E. 
Published: April 2010

AbstractThe cover picture shows shows the synthesis of a novel type of functionalized cyclic oligosaccharides by unusually efficient head‐to‐tail intramolecular glycosylation of corresponding monohydroxy ethylthio glycosides derived from oligo‐(1→6)‐β‐D‐glucosamines. Detailed NMR and conformational investigations show that the carbohydrate macrocycles obtained may be regarded as convenient scaffolds for the design of conjugates with defined valency, symmetry and flexibility. The absence of a distinct hydrophobic cavity prevents the possibility of the formation of inclusion complexes as in cyclodextrins. Details are discussed in the article by N. E. Nifantiev et al. on p. 2465 ff.
Feasibility analysis for decomposition of phosphogypsum in cement precalciner
Authors: Jianxi Li , Su Yu , Liping Ma 
Published: April 2010

AbstractIn recent years, many scholars had put forward a new idea in which the New Suspension Preheater Cement Production Technique (or NSP) would be used to decompose phosphogypsum to produce vitriol and cement. In this article, combining the characteristic of precalciner in NSP technique and the thermal analysis for phosphogypsum, the adaptability of decomposition temperature of phosphogypsum for the preheated calciner was researched, as well as the relationship between decomposition efficiency of phosphogypsum and the felt block characteristic of the kiln system. Results showed that even in reduction atmosphere, the decomposition temperature of phosphogypsum is still more than 1200°C, it is difficult to realize this new process with NSP cement production technique. © 2010 American Institute of Chemical Engineers Environ Prog, 2011
Determination of environmental impact and optimum thickness of insulation for building walls
Authors: Ucar Aynur , Balo Figen 
Published: April 2010

AbstractThe optimum insulation thickness of the external walls, energy cost savings over a lifetime of 10 yr, and payback periods are calculated for the four different wall types in the city of Elazığ, Turkey. The net energy cost savings is calculated by using the P1−P2 method. According to the results, the optimum insulation thickness has been obtained by using coal as the energy source and stropor as the insulating material. The results show that the optimum insulation thicknesses vary between 4.5 and 16.5 cm, energy cost savings vary between 14 and 22 $/m2, and payback periods vary between 1.5 and 2 yr depending on the wall type. The highest value of energy cost savings is reached for the Wall III, which has a composite structure called a sandwich wall. The emissions of CO2, SO2, CO, and NOx from the combustion of coal are calculated for the four different wall types. It has been determined that when the optimum insulation thickness is used for coal as an energy source in Elazığ, the CO2 emission rates of fuel vary between 8.3 and 9.3 kg/m2 yr and the SO2 emission rates of fuel vary between 0.017 and 0.019 kg/m2 yr depending on the wall type. The emissions of CO and NOx are reduced by 82% by applying this optimum insulation thickness. © 2010 American Institute of Chemical Engineers Environ Prog, 2011
4‐Phosphorylated 1,2‐disubstituted imidazoles
Authors: Huryeva A. N. , Marchenko A. P. , Koidan G. N. , Yurchenko, A. A. , Zarudnitskii E. V. , Pinchuk A. M. , Kostyuk A. N. 
Published: April 2010

Abstract4‐Selenophosphoryl‐1,2‐disubstituted imidazoles have been obtained by thermal decomposition of methyl 5‐(diamidoselenophosphoryl)imidazolium chlorides. The position of selenophosphoryl group in the imidazole ring was proved by 1H, 13C NMR spectroscopy, and X‐ray analysis. Previously unknown diamido‐ and dichloro(imidazol‐4‐yl)‐ phosphonites were synthesized, and differences in their reactivity compared to analogous 5‐phosphorylated imidazoles are shown. © 2010 Wiley Periodicals, Inc. Heteroatom Chem 21:103–118, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20584
Synthesis and in vitro antibacterial evaluation of 1‐substituted‐4‐ethoxycarbonylmethylthiosemicarbazides and products of their dehydrocyclization
Authors: Siwek Agata , Stefańska Joanna , Wawrzycka‐Gorczyca Irena , Wujec Monika 
Published: April 2010

AbstractA series of s‐triazoles and thiohydantoines were synthesized by dehydrocyclization of 1‐substituted‐4‐ethoxycarbonylmethylthiosemicarbazides. The molecular structure proposed for s‐triazoles was confirmed by the X‐ray crystal structure analysis of one compound that was prone to crystallization. All compounds were tested in vitro for their antibacterial activity. Some of them showed low levels of activity against Gram‐positive species, MIC range 100–400 μg/mL or higher. © 2010 Wiley Periodicals, Inc. Heteroatom Chem 21:131–138, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20597
Solvent‐Free Synthesis of Diphenyl [2‐(Aminocarbonyl)‐1,2‐dihydroisoquinolin‐1‐yl]phosphonates from Isoquinoline, Isocyanates, and Diphenyl Phosphonate
Authors: Yavari Issa , Mirzaei Anvar , Khalili Gholamhossein 
Published: April 2010

AbstractThe 1 : 1 intermediates generated by addition of isoquinoline to isocyanates were trapped by diphenyl phosphonate to yield diphenyl [2‐(aminocarbonyl)‐1,2‐dihydroisoquinolin‐1‐yl]phosphonates in good yields under solvent‐free conditions.
New Synthetic Routes to Biologically Interesting Geranylated Flavanones and Geranylated Chalcones: First Total Synthesis of (±)‐Prostratol F, Xanthoangelol, and (±)‐Lespeol
Authors: Jung Doo Hwan , Lee Yong Rok , Kim Sung Hong 
Published: April 2010

AbstractA new and efficient synthetic approach to biologically interesting geranylated flavanones and geranylated chalcones is described. Thus, the first total syntheses of the geranylated flavanones (±)‐prostratol F (1), (±)‐8‐geranyl‐3′,4′,7‐trihydroxyflavanone (2), and (±)‐6‐geranyl‐5,7‐dihydroxy‐3′,4′‐dimethoxyflavanone (3) were carried out starting from 2,4‐dihydroxyacetophenone (10) and 2,4,6‐trihydroxyacethophenone (17) in five to six steps (Schemes 2 and 3). The geranylated chalcones xanthoangelol (4), 3‐geranyl‐2,3′,4,4′‐tetrahydroxychalcone (5), (±)‐lespeol (6), and lespeol derivatives (±)‐7–9 were synthesized starting from 2,4‐dihydroxyacetophenone (10) in three to four steps (Schemes 2 and 6).
Pronounced Catalytic Activity of Manganese(III)–Schiff Base Complexes in the Oxidation of Alcohols by Tetrabutylammonium Peroxomonosulfate
Authors: Rezaeifard Abdolreza , Jafarpour Maasoumeh , Nasseri Mohammad Ali , Haddad Reza 
Published: April 2010

AbstractA novel and practical catalytic method for efficient and highly selective oxidation of a wide range of benzylic, allylic, aliphatic, primary, and secondary alcohols to the corresponding aldehydes and ketones using tetrabutylammonium peroxomonosulfate catalyzed by tetradentate Schiff base–MnIII complexes has been developed. Electron‐deficient and hindered alcohols required longer reaction times for oxidation in this catalytic system. The electron‐poor and hindered salicylidene ring of the ligand enhanced the catalytic activity and stability of Mn catalysts. The desired turnover numbers obtained in the oxidation reactions indicated the high efficiency and relative stability of these simple Schiff base complexes in this catalytic system.
Guaiane Sesquiterpenoids Isolated from the Fruits of Torilis japonica and Their Cytotoxic Activity
Authors: Kim Dong Chun , Kim Jeong Ah , Min Byung Sun , Jang Tae‐Su , Na MinKyun , Lee Seung Ho 
Published: April 2010

AbstractTwo new guaiane sesquiterpenoids, 11‐(acetyloxy)‐1,8‐dihydroxyguai‐4‐en‐3‐one (5) and (1α,6β)‐1,6‐dihydroxytorilin (6), were isolated from the fruits of Torilis japonica (Umbelliferae), along with four known sesquiterpenes, torilin (1), torilolone (2), (1β)‐1‐hydroxytorilin (3), and (1α)‐1‐hydroxytorilin (4). During the phytochemical investigation, daucosterol, friedelin, and epifriedelanol were also isolated from the plant for the first time. The structures of the new sesquiterpenoids 5 and 6 were determined by comprehensive analyses of MS and NMR spectroscopic data. These isolates were evaluated against human breast cancer cells (MCF‐7) and Lewis lung carcinoma (LLC) cells. Compounds 1, 3, and 4 exhibited cytotoxic activity against the LLC cells with IC50 values of 31.3, 32.5, and 34.0 μg/ml, respectively. However, no significant cytotoxicity was found against the MCF‐7 cells for any of the compounds tested.
New Cytotoxic Myrsinane‐Type Diterpenes from Euphorbia prolifera
Authors: Li Jie , Xu Liang , Wang Feng‐Peng 
Published: April 2010

AbstractFour new myrsinol diterpenes, proliferins A–D (1–4, resp.) were isolated from the EtOH extracts of the roots of Euphorbia prolifera, along with four known compounds, euphorprolitherin B (5), euphorprolitherin D (6), SPr5 (7), and 14‐desoxo‐3‐O‐propionyl‐5,15‐di‐O‐acetyl‐7‐O‐nicotinoylmyrsinol‐14β‐acetate (8). Their structures were established on the basis of spectroscopic methods, including HR‐ESI‐MS, and 1D‐ and 2D‐NMR techniques. The cytotoxicity of compounds 1, 3, and 4 against cancer cells was evaluated, with compound 1 being active against A2780 cancer cells.
Monoterpenoids from the Fruit of Gardenia jasminoides
Authors: Yu Yang , Gao Hao , Dai Yi , Wang Ying , Chen He‐Ru , Yao Xin‐Sheng 
Published: April 2010

AbstractEight new monoterpenoids, jasminoside J (1), jasminoside K (2), 6′‐O‐trans‐sinapoyljasminoside B (3), 6′‐O‐trans‐sinapoyljasminoside L (4), jasminosides M–P (5–8), together with three known analogues, jasminoside C (9), jasminol E (10), and sacranoside B (11), were isolated from the fruit of Gardenia jasminoides Ellis (Rubiaceae). Their structures were elucidated by spectral and chemical methods.