bluuebunny/crossref_metadata_2025_split huggingface dataset:
Biosorption of zinc ions from aqueous solutions onto natural dye waste of Hibiscus rosa sinensis: Thermodynamic and kinetic studies
Authors: Vankar Padma S. , Sarswat Rishabh , Sahu Ramashanker 
Published: February 2011

AbstractThe objective of the study is to assess the uptake of zinc ions from aqueous solutions onto natural dye waste (aqueous color extracted) of Hibiscus rosa sinensis flower. The study investigates the effects of process parameters such as pH, temperature, agitating rate, adsorbent mass, and particle size. The extent of adsorption increased with an increase of pH. Furthermore the adsorption of zinc increases with increasing adsorbent doses and decreased with the adsorbent particle size. The adsorption data follows both Langmuir and Freundlich adsorption models, however the Langmuir model is better suited than the Freundlich model and the adsorption maxima at equilibrium to be 94.339 mg/g of zinc ions on Hibiscus Dye Waste (HDW) sorbent at 20°C. The adsorption of zinc ions increased with increasing temperature, indicating endothermic nature of the adsorption process. Using the first‐order kinetic constants, the activation energy of adsorption (Ea) was determined as 86.357 kJ/mol according to the Arrhenius equation. This study indicated that the HDW can be used as an effective and environmentally safe Biosorbent for the treatment of zinc containing aqueous solutions. © 2011 American Institute of Chemical Engineers Environ Prog, 2012
A new process developed for separation of lignin from ammonium hydroxide pretreatment solutions
Authors: Sherman Steven R. , Goodell John J. , Milliken Charles E. , Morris Jacob A. , Gorensek Maximilian B. 
Published: February 2011

AbstractA method is described for separating lignin from liquid solutions resulting from the pretreatment of lignocellulosic materials such as switchgrass with ammonium hydroxide. The method involves a sequence of steps including acidification, evaporation, and precipitation or centrifugation that are performed under defined conditions, and results in a relatively pure, solid lignin product. The method is tested on ammonium hydroxide solutions containing lignin extracted from switchgrass. Experimental results show that the method is capable of recovering between 66–95% of dissolved lignin as a precipitated solid. Cost estimates of pilot‐scale and industrial‐scale expressions of the process indicate that breakeven lignin prices of $2.36/kg and $0.78/kg, respectively, may be obtainable with this recovery method. © 2011 American Institute of Chemical Engineers Environ Prog, 2012
PBDEs and methoxylated analogues in sediment cores from two Michigan, USA, inland lakes
Authors: Bradley Patrick W , Wan Yi , Jones Paul D , Wiseman Steve , Chang Hong , Lam Michael H.W , Long David T , Giesy John P 
Published: February 2011

Abstract
Polybrominated diphenyl ethers (PBDEs) have been widely studied in sediments from the North American Great Lakes; however, no studies have been conducted of occurrences of methoxylated (MeO-) PBDEs in abiotic compartments in this region. In the present study, 23 tri- to hepta-PBDEs and 12 MeO-PBDEs were analyzed in dated sediment cores collected from two inland lakes (White Lake and Muskegon Lake) in Michigan, USA. Concentrations of Σ23PBDEs ranged from 3.9 × 10−1 to 2.4 × 100 and from 9.8 × 10−1 to 3.9 × 100 ng/g dry weight in White Lake and Muskegon Lake, respectively. The historical trends of tri- to hepta-PBDEs in the two lakes were different, possibly because of different input and remediation histories. The tri- to hepta-PBDE profiles were similar in the two lakes, with BDE-47 as the predominant congener, followed by BDE-99 and BDE-183. A different temporal trend for BDE-183 was found compared with other PBDEs, which is consistent with debromination of high-brominated PBDEs during sedimentation and aging. Methoxylated-PBDEs were detected only in Muskegon Lake (3.6 × 10−3 to 1.2 × 10−1 ng/g dry wt). Methoxylated PBDEs showed different temporal trends compared with tri- to hepta-PBDEs. The differences in patterns of concentrations of MeO-PBDEs in the two lakes might be due to different aquatic communities in each lake. The occurrences of MeO-PBDEs could be the major source of hydroxylated–polybrominated diphenyl ethers (OH-PBDEs) observed in organisms collected in these freshwater systems. Environ. Toxicol. Chem. 2011; 30:1236–1242. © 2011 SETAC
Evidence suggesting that di-n-butyl phthalate has antiandrogenic effects in fish
Authors: Aoki Katherine A.A , Harris Catherine A , Katsiadaki Ioanna , Sumpter John P 
Published: February 2011

Abstract
Phthalate ester plasticizers are antiandrogenic in mammals. High doses of certain phthalates consistently interfere with the normal development of male offspring exposed in utero, causing disrupted sperm production, abnormal development of the genitalia, and in some cases infertility. In the environment, phthalates are considered ubiquitous and are commonly measured in aquatic ecosystems at low nanograms to micrograms per liter concentrations. Given the similarity between mammalian and teleost endocrine systems, phthalate esters may be able to cause antiandrogenic endocrine disruption in fish in the wild. In the present study, adult male three-spined sticklebacks (Gasterosteus aculetaus; n = 8) were exposed to di-n-butyl phthalate (DBP; 0, 15, and 35 µg DBP/L) for 22 d and analyzed for changes in nesting behavior, plasma androgen concentrations, spiggin concentrations, and steroidogenic gene expression. Plasma testosterone concentrations were significantly higher in males from the 35 µg DBP/L group compared with the solvent control, whereas plasma 11-ketotestosterone concentrations were not significantly affected. Expression of steroid acute regulatory protein and 3β-hydroxysteroid dehydrogenase remained unchanged. Spiggin concentrations were significantly lower in the males exposed to 35 µg DBP/L. Nest building appeared to be slower in some males exposed to DBP, but this was not statistically significant. These results suggest that DBP has antiandrogenic effects in fish. However, further research is required to firmly establish the consequences of chronic DBP exposure in fish. Environ. Toxicol. Chem. 2011; 30:1338–1345. © 2011 SETAC
Hydrological processes of a rainforest headwater swamp from natural chemical tracing in Nsimi watershed, Cameroon
Authors: Maréchal Jean‐Christophe , Braun Jean‐Jacques , Riotte Jean , Bedimo Jean‐Pierre Bedimo , Boeglin Jean‐Loup 
Published: February 2011

AbstractThe hydrological role of a headwater swamp in a tropical rainforest is studied using chloride mass balance (CMB) and end‐member mixing analysis. There are three main contributions to streamflow: (1) the hillside bedrock aquifer, (2) overland flow from the swamp during storm events and (3) groundwater flow from the swamp aquifer. Before rainfall events of the wet season, the pre‐event water comprises a mix of 80% of bedrock aquifer and 20% of swamp aquifer. During storms, the relative contribution of overland flow increases according to the rainfall intensity and the initial saturation rate of the pre‐event water reservoirs. The yearly contribution of overland flow from the swamp to the stream is about 31%. The relationship between the swamp and the stream fluctuates with space and time. Generally, the swamp is drained by the stream; however, at the end of long dry seasons, after the first rains, indirect recharge occurs from the stream to the swamp with a hydraulic gradient inversion in the swamp aquifer. The net contribution of the swamp aquifer to the stream is only 4%, which is much lower than the hillside aquifer contribution of about 65%. Recharge on the swamp being very low, these results suggest that, except for a few storms at the end of the dry season, the Nsimi swamp does not contribute to flood attenuation. Evapotranspiration is higher on the hillside than in the swamp. Nevertheless, depletion of water stored within the swamp is dominated by evaporation rather than by its contribution to streamflow. The export of solutes through swamp groundwater flow below the weir is low (<7%). Nevertheless, the swamp is the most active area of weathering in the watershed. Copyright © 2011 John Wiley & Sons, Ltd.
Downstream fining in contrasting reaches of the sand‐bedded Yellow River
Authors: Ta Wanquan , Wang Haibin , Jia Xiaopeng 
Published: February 2011

AbstractCompared to downstream fining of a gravel‐bedded river, little field evidence exists to support the process of downstream fining in large, fine sand‐bedded rivers. In fact, the typically unimodal bed sediments of these rivers are thought to produce equal mobility of coarse and fine grains that may discourage downstream fining. To investigate this topic, we drilled 200 sediment cores in the channel beds of two fine‐grained sand‐bedded reaches of the Yellow River (a desert reach and a lower reach) and identified a fine surface layer (FSL) developed over a coarse subsurface layer (CSL) in the 3‐m‐thick bed deposits. In both reaches downstream, the thickness of the FSL increased, while that of the CSL decreased. Comparison of the depth‐averaged median grain sizes of the CSL and the FSL separately in both reaches shows a distinct downstream fining dependence to the median grain size, which indicates that at a large scale of 600‐800 km, the CSL shows a significant downstream fining, but the FSL shows no significant trends in downstream variations in grain size. This result shows that fine sediment supply (<0·08 mm median grain size) from upstream, combined with lateral fine sediment inputs from tributaries and bank erosion, can cause a rapid fining of the downstream channel bed surface and can develop the FSL layer. However, in the desert reach, lateral coarse sediment supply (>0·08 mm median grain size) from wind‐borne sediments and cross‐desert tributaries can interrupt the FSL and coarsen the channel bed surface locally. Copyright © 2011 John Wiley & Sons, Ltd.
Cost management in tough times
Authors: Reider Rob 
Published: February 2011

AbstractIs business slow? Is your company trying to work itself out of a bad financial situation?Many companies face those problems in these tough times. But mostly the cause of those problems is excessive costs—or an inadequate margin between costs and selling prices.So how can you manage the costs that are most difficult to control—especially now?The author, a well‐known management consultant, gives you some key checklists and other valuable insights to get your firm back on track. © 2011 by Rob Reider
Management paradigm: The untapped power of process laws
Authors: Brimson James A. 
Published: February 2011

AbstractIf we are to compete in a dynamic business world, provide our decision makers with transparent information, and create value for our customers, then we must be bold and objectively reevaluate our management practices. We must adopt a management philosophy that mirrors the way the business world behaves! © 2011 Wiley Periodicals, Inc.
Endostatin‐ and interleukin‐2‐expressing retroviral bicistronic vector for gene therapy of metastatic renal cell carcinoma
Authors: Rocha Flávia Gomes de Góes , Calvo Fernanda B. , Chaves Karen C. , Peron Jean P. S. , Marques Rodolfo F. , de Borba Tânia R. , Braga Marina S. , Pereira Cleide B. , Vicente Elisabete J. , Chammas Roger , Schor Nestor , Bellini Maria H. 
Published: February 2011

AbstractBackgroundMetastatic renal cell carcinoma (mRCC) is one of the most treatment‐resistant malignancies. Despite all new therapeutic advances, almost all patients develop resistance to treatment and cure is rarely seen. In the present study, we evaluated the antitumor effect of a bicistronic retrovirus vector encoding both endostatin (ES) and interleukin (IL)‐2 using an orthotopic metastatic RCC mouse model.MethodsBalb/C‐bearing Renca cells were treated with NIH/3T3‐LendIRES‐IL‐2‐SN cells. In the survival studies, mice were monitored daily until they died. At the end of the in vivo experiment, serum levels of IL‐2 and ES were measured, the lung was weighed, and the number of metastatic nodules, nodule area, tumor vessels and proliferation of tumor‐infiltrating Renca cells were determined.ResultsInoculation of NIH/3T3‐LendIRES‐IL‐2‐SN cells resulted in an increase in ES and IL‐2 levels in the treated group (p < 0.05). There was a significant decrease in lung wet weight, lung nodule area and tumor vessels in the treated group compared to the control group (p < 0.001). The proliferation of Renca cells in the bicistronic‐treated group was significantly reduced compared to the control group (p < 0.05). Kaplan–Meier survival curves showed that the probability of survival was significantly higher for mice submitted to bicistronic therapy (log‐rank test, p = 0.0016). Bicistronic therapy caused an increase in the infiltration of CD4, CD4 interferon (IFN)γ‐producing, CD8, CD8 IFNγ‐producing and natural killer (CD49b) cells.ConclusionsRetroviral bicistronic gene transfer led to the secretion of functional ES and IL‐2 that was sufficiently active to: (i) inhibit tumor angiogenesis and tumor cell proliferation and (ii) increase the infiltration of immune cells. Copyright © 2011 John Wiley & Sons, Ltd.
Synthesis of new vinylpyridinium salts
Authors: Posada Paloma , Braña Miguel F. , Villarino Antonio L. , Domínguez Vicente , Ortuño Ismael , Martínez Carmen 
Published: February 2011

AbstractThis article reports the reactions of salts of 4‐ureylmethylpyridinium and 4‐ethoxycarbonylaminomethylpyridinium with carbonylic compounds, performed with the aim of obtaining new vinylpyridinium salts. These reactions can lead to the formation of both condensation and dimerization products. The type of products formed is conditioned by the nature of the salts and carbonyl groups involved. The interest generated by the condensation products formed lies in their potential cholinergic activity. J. Heterocyclic Chem., 2011.
In vitro cytotoxic evaluation of some new heterocyclic sulfonamide derivatives
Authors: Ghorab Mostafa M. , Al‐Said Mansour S. , El‐Hossary Ebaa M. 
Published: February 2011

AbstractSulfonamide‐bearing compounds posses many types of biological activities and have been recently reported to show substantial antitumor activity in vitro and/or in vivo. There are a variety of mechanisms for the anticancer activity, and the most prominent mechanism is the inhibition of carbonic anhydrase isozymes. This work reports the synthesis of some new quinoline, pyrimido[4,5‐b]quinoline and 3,1‐oxazinoquinoline derivatives bearing a sulfonamide moiety. All the newly synthesized compounds were evaluated for their in vitro anticancer activity against Ehrlich ascites carcinoma cells. Compounds 10, 13, and 26 were the most active compounds with IC50 values of 6.1 μM, 6.8 μM, and 6.4 μM, respectively, and exhibited better activities than the reference drug doxorubicin (IC50 = 68.1 μM). J. Heterocyclic Chem., 2011.
Poly(N‐bromobenzene‐1,3‐disulfonamide) and N,N,N′,N′‐tetrabromobenzene‐1,3‐disulfonamide as a mild and efficient catalyst for chemoselective thioacetalization of carbonyl functions and transthioacetalization reactions
Authors: Veisi Hojat , Ghorbani‐Vaghei Ramin , Dadamahaleh Somayeh Akbari 
Published: February 2011

AbstractPoly(N‐bromobenzene‐1,3‐disulfonamide) and N,N,N′,N′‐tetrabromobenzene‐1,3‐disulfonamide are effective catalysts for chemoselective dithioacetalization of aldehydes in the presence of ketones under neutral conditions. J. Heterocyclic Chem., (2011).
The silent organizational pathology of insidious intimidation
Authors: Zimmerman Theresa , Amori Geri 
Published: February 2011

AbstractWhile organizations are valiantly striving to address acts of disruption among physicians and nurses, a silent and yet equally disruptive pathology is spreading through the veins of the organization. This behavior is found among all ranks and responsibilities, from the C‐suite to the housekeeping staff. It occurs daily and is rarely reported. It continues because its nature is such that it is difficult to measure, the victims often feel helpless, and the perpetrators are often those in positions that are not normally perceived to be as essential to the flow of patient care. Nonetheless, this insidious intimidation chills communication, reduces morale, and ultimately harms patients. Organizations that desire a culture of safety and comfort must address this behavior through individual coaching, education of all staff, a willingness to tackle system frustrations that amplify and perpetuate the behavior, and establish processes for dealing fairly and firmly with the behavior.
Applying the Neuman Stressor Model for workplace safety
Authors: Greenawalt Julia , Wachter Jan K. 
Published: February 2011

AbstractThis article applies the Betty Neuman Stressor Model, typically used in nursing education to explain illness causation of the patient, to educating healthcare workers on workplace stressors (i.e., hazards). Prevention strategies for dealing with workplace hazards are discussed in terms of bolstering flexible lines of defense or lines of resistance as described by this stressor model. Key hazards to include in a healthcare safety curriculum or in workplace safety training are provided.
No more paper tiger: Promise and peril as HIPAA goes HITECH
Authors: Vinson Devin D. 
Published: February 2011

AbstractThe HITECH Act, passed in 2009 by the federal government, deepens the concerns for patient privacy faced by healthcare organizations subject to HIPAA. This article examines the law and demonstrates that healthcare entities are facing greater duties to safeguard patients' protected health information, as well as severe civil and criminal penalties should they fail to do so. In recognition of this heightened liability, healthcare entities must reassess their methods for handling patient data and take action in key areas to ensure that risk is contained.
Phase‐Sensitive Constant Temperature Anemometry
Authors: van den Berg Thomas H. , Wormgoor Willem D. , Luther Stefan , Lohse Detlef 
Published: February 2011

AbstractHot‐film measurements in bubbly flows provide time series that contain information about the liquid and the gas phase. Signal classification is required to disentangle the corresponding segments. The classification algorithms are prone to detection bias, which makes hot‐film measurements in two‐phase flows very difficult. We present a new phase‐sensitive hot‐film probe that provides velocity data and optical phase classification in a single device. We report a proof of concept of this method and demonstrate its accuracy and robustness. Furthermore, we discuss its application to turbulent bubbly flows.magnified image
Obtaining of pure nanostructured titanium for medicine by severe deformation at cryogenic temperatures
Authors: Kutniy K.V. , Volchok O.I. , Kislyak I.F. , Tikhonovsky M.A. , Storozhilov G.E. 
Published: February 2011

AbstractThe purpose of this study was to obtain pure nanostructured titanium by drawing at cryogenic temperatures and to investigate its structural and mechanical properties. Titanium rods were obtained by severe plastic deformation under the scheme of upsetting‐extrusion‐drawing. Upsetting and extrusion were performed at 800 K, obtained rod was initially drawn at 300 K to diameter of 3.7 mm (degree of true strain ε = 3.2). Further deformation of the finish drawing was performed at 77 K (liquid nitrogen) and at 300 K.
Biocompatible and biodegradable MOPEO‐b‐PCL diblock copolymer micelles as nanocontainers for drugs
Authors: Partsevskaya S.V. , Zheltonozhskaya T.B. , Permyakova N.M. , Kolendo A.Y. 
Published: February 2011

AbstractAmphiphilic MOPEO‐b‐PCL diblock copolymers with biocompatible and biodegradable blocks of methoxypoly(ethylene oxide) (Mv = 2·103) and poly(ε‐caprolactone) of a variable chain length were synthesized.Their structure, the micellization in dioxane/aqueous solutions and also the interaction of micelles with the model drug prednisolon (PS) were studied by 1H NMR, DSC, UV/visible spectroscopy, static light scattering and FTIR. A binding of PS by micellar nanocontainers by means of hydrogen bonds and hydrophobic interactions, that enhances essentially the stability of micellar structures in a solution, was established.
Highly anisotropic magnetic properties of ultrathin (La,Na) MnO3 films on LaAlO3 (001) substrates
Authors: Tovstolytkin A. I. , Matviyenko A. I. , Tsmots V. M. , Pankiv L. I. , Pankiv I. S. 
Published: February 2011

AbstractMagnetic measurements and resonance measurements have been carried out on ultrathin (20 nm) films of sodium‐doped lanthanum manganite fabricated by magnetron sputtering on single crystalline LaAlO3 (001) substrates. Complex behavior of magnetization and magnetic anisotropy has been revealed. It is shown that an out‐of‐plane alignment of the film magnetization is characteristic of the films at low temperatures. As temperature increases, a spin‐reorientation transition occurs at about 160 K and in‐plane alignment of magnetization becomes more preferable. Further increase in temperature results in an isotropic behavior of magnetization as temperature approaches and crosses the Curie point (≈270 K). It is concluded that anisotropy energy, originated from a substrate‐induced compressive strain, is responsible for the unusual behavior of the ultrathin films of sodium‐doped manganites.
Nanocrystalline calcium‐deficient hydroxyapatite prepared by a microwave‐assisted solvent‐free reaction
Authors: Zyman Z. , Goncharenko A. , Rokhmistrov D. , Epple M. 
Published: February 2011

AbstractA microwave‐assisted solvent‐free synthesis of hydroxyapatite from calcium nitrate and sodium phosphate is reported. The product was characterized with respect to the presence of foreign ions and its thermal behavior. An apatite phase was formed in the mixture after irradiation with 2.45 GHz microwaves for 4 min at 350 or 700 W. Structurally, the product was a nanocrystalline calcium‐deficient hydroxyapatite (CDHA) with a Ca/P ratio around 1.5, containing some H2O, HPO42– and CO32–. After heating to 900°C for 1 h, β‐tricalcium phosphate (β‐TCP) was formed, demonstrating that this microwave‐assisted solvent‐free synthesis is well suited to prepare a precursor to bioceramics.
‘Modified Hermitian and skew‐Hermitian splitting methods for non‐Hermitian positive‐definite linear systems’ [Numer. Linear Algebra Appl. 14 (2007) 217–235]
Authors: Salkuyeh Davod Khojasteh , Behnejad Shiva 
Published: February 2011

SUMMARYIn this note, some errors in the article (Numer. Linear Algebra Appl. 2007; 14:217–235) are pointed out and some correct results are presented. Copyright © 2011 John Wiley & Sons, Ltd.