bluuebunny/crossref_metadata_2025_split huggingface dataset:
The case for involving adult children outside of the household in the self-management support of older adults with chronic illnesses
Authors: Piette John D. , Rosland Ann Marie , Silveira Maria , Kabeto Mohammed , Langa Kenneth M. 
Published: March 2010

Objectives: This study sought to (1) identify barriers to spousal support for chronic illness self-care among community-dwelling older adults; and (2) describe the potential availability of self-care support from adult children living outside of the household. Methods: Nationally representative US sample of chronically ill adults aged 51+ were interviewed as part of the Health and Retirement Study (N = 14,862). Both participants and their spouses (when available) reported information about their health and functioning. Participants also reported information about their contact with adult children and the quality of those relationships. Results: More than one-third (38%) of chronically ill older adults in the US are unmarried; and when spouses are available, the majority of them have multiple chronic diseases and functional limitations. However, the vast majority of chronically ill older adults (93%, representing roughly 60 million Americans) have adult children, with half having children living over 10 miles away. Most respondents with children (78%) reported at least weekly telephone contact and that these relationships were positive. Roughly 19 million older chronically ill Americans have adult children living at a distance but none nearby; these children are in frequent telephone contact and respondents (including those with multiple chronic diseases) report that the relationships are positive. Discussion: As the gap between available health services for disease management and the need among community-dwelling patients continues to grow, adult children—including those living at a distance—represent an important resource for improving self-care support for people with chronic diseases.
Psychological health in older adult spousal caregivers of older adults
Authors: Lavela Sherri L. , Ather Nazneen 
Published: March 2010

Objectives: The need for informal caregiving has been rapidly increasing across several countries. Spouses comprise a sizeable segment of informal caregivers and typically represent an older cohort with special health concerns. The objective of this review was to examine psychological health outcomes in older adult spouses caring for older adults. Methods: Literature review/synthesis (1999—2009). Results: Compared to demographically matched married non-caregiving controls, older adult spousal caregivers experienced more cognitive functioning difficulties, strain, distress, stress, loneliness, depression, anxiety and poorer mental health. Caregivers of spouses with cognitive impairments, quite often wives, were especially affected by poor psychological health, as were caregivers who were new to the caregiving role and those who rated caregiving as stressful. Psychological health improved when the caregiving role ceased. Discussion: Several poor psychological outcomes were found in older adults caring for their spouses; the magnitude of which varied and were more pronounced under certain circumstances. To preserve caregiver health, maintain recipient health and care quality and avoid exceeding system of care capacity, efforts are needed to provide support to older adult spousal caregivers and recipients. Couples may need to be assessed as a unit, taking gender and cultural considerations into account, and additional resources may be required.
The relationship between blood groups and disease
Authors: Anstee David. J. 
Published: March 2010

AbstractThe relative contribution of founder effects and natural selection to the observed distribution of human blood groups has been debated since blood group frequencies were shown to differ between populations almost a century ago. Advances in our understanding of the migration patterns of early humans from Africa to populate the rest of the world obtained through the use of Y chromosome and mtDNA markers do much to inform this debate. There are clear examples of protection against infectious diseases from inheritance of polymorphisms in genes encoding and regulating the expression of ABH and Lewis antigens in bodily secretions particularly in respect of Helicobacter pylori, norovirus, and cholera infections. However, available evidence suggests surviving malaria is the most significant selective force affecting the expression of blood groups. Red cells lacking or having altered forms of blood group-active molecules are commonly found in regions of the world in which malaria is endemic, notably the Fy(a−b−) phenotype and the S-s− phenotype in Africa and the Ge− and SAO phenotypes in South East Asia. Founder effects provide a more convincing explanation for the distribution of the D− phenotype and the occurrence of hemolytic disease of the fetus and newborn in Europe and Central Asia.
Can regulation improve the performance of government-controlled water utilities?
Authors: Ehrhardt David , Janson Nils 
Published: March 2010

This paper provides evidence on whether regulation can improve the performance of government-controlled water utilities. While other studies have examined whether private participation combined with regulation can improve the performance of government-controlled water utilities, there has been little research on whether regulation alone can improve performance.
This paper examines five case studies on water utility reform in Latin America and the Caribbean. In each case study, a regulatory regime designed for private companies was applied to a government-controlled utility. Assessing performance across a number of indicators, the evidence shows that performance was as likely to deteriorate as to improve during periods of regulation of government-controlled utilities. This contrasts with the evidence of improvement following reforms that combined regulation with private participation. The findings suggest that conventional regulation may be of little use in government-controlled utilities. Conventional regulation is designed to prevent a profit-maximizing utility from raising tariffs above reasonable cost-recovery levels. Government controlled utilities, however, are not commercially motivated and face systematic incentives for short-termism in tariff-setting. Therefore, limiting monopoly profits is not usually the problem that needs to be addressed.
We conclude that conventional regulation of a government-controlled utility is not useful in isolation. However, regulatory tools can complement governance reforms. One approach may be to adapt conventional regulatory tools so as to help citizens judge utilities' performance. Such an approach would help increase government accountability for the performance of government-controlled utilities.
Copper removal by carbon nanomaterials bearing cyclam-functionalized silica
Authors: Kurczewska Joanna , Schroeder Grzegorz , Narkiewicz Urszula 
Published: March 2010

Abstract
The synthesis of metal (Fe, Co, Ni)-encapsulated carbon nanomaterials coated with cyclam-bonded silica has been described. The organic layer was identified by Fourier transform infrared spectroscopy and elemental analysis. The functionalized magnetic nanomaterials were employed to extract the divalent cations: copper, calcium, cobalt, manganese and nickel from aqueous solutions. Their adsorption capacities were studied by the batch procedure. The concentration of cations extracted was determined by inductively coupled plasma mass spectrometry. Influence of different parameters viz. pH, amount of the compound studied, contact time, on the cation extraction was investigated. Under optimum conditions copper extraction was significantly more efficient when compared with other coexisting ions.
A preliminary study on the effect of mineralization parameters on determination of metals in Viscum album species
Authors: Blicharska Eliza , Komsta Łukasz , Kocjan Ryszard , Gumieniczek Anna , Robak Artur 
Published: March 2010

Abstract
An increasing interest in determination of various macro- and microelements in medicinal plants has been observed. The majority of studies are carried out using one mineralization method without any optimization. The present study demonstrates that changes in mineralization parameters can significantly affect the recovery of the elements determined. In the study, the dried plant material was mineralized in 12 ways and iron (Fe), copper (Cu), zinc (Zn), nickel (Ni) and manganese (Mn) levels were determined. The samples were mineralized in the dry or open microwave mode as well as 10 closed microwave modes. The influence of acid amounts, irradiation power and time, addition of hydrogen peroxide and perfluoric acid was examined. All parameters were shown to be critical — good efficiency was observed with larger amounts of acid. The determined content varied significantly in the same sample and were in the ranges (ug g−1): 46–136 (Fe), 1.4–11.8 (Cu), 4.0–11.3 (Ni), 15.4–53.8 (Zn) and 9.5–67.6 (Mn). Increased irradiation resulted in the loss of copper and zinc and better recovery of nickel. The results demonstrate that such determinations should include the mineralization optimization step.
Copper (II) chloride / tetrabutylammonium bromide catalyzed oxidation of 2,6-diisopropylnaphthalene and 4,4′-diisopropylbiphenyl
Authors: Orlińska Beata , Zawadiak Jan 
Published: March 2010

Abstract
The oxidation processes of 2,6-diisopropylnaphthalene and 4,4′-diisopropylbiphenyl with oxygen in the presence of a catalyst, composed of copper(II) chloride and tetrabutylammonium bromide, were investigated. It was found that, in essence, only one isopropyl group undergoes oxidation, and obtained mixtures contained mainly peroxide, alcohol, ketone and only small amounts of hydroperoxide.
Effect of alumina incorporation on restricting grain growth of nanocrystalline tin(IV) oxide
Authors: Al-Angari Y. , Kadi M. , Ismail I. , Gabal Mohamed. 
Published: March 2010

Abstract
In this project, nanocrystalline SnO2 powders were successfully prepared by (a) citrate sol-gel and (b) direct precipitation methods. Powders were characterized using thermal analysis techniques (DTA-TG-DSC), X-ray powder Diffraction (XRD), surface area (BET) and electrical conductivity measurements. XRD patterns showed the presence of the cassiterite structure. SnO2 particles, prepared through sol-gel method exhibit crystallite sizes in the range from 3.1 to 22.3 nm when the gel is heat treated at different temperatures up to 900°C. SnO2 nanocrystallites prepared by the precipitation method are comparatively larger in size. The higher specific surface area was obtained for the powder prepared using sol-gel method and the obtained average grain size (d) is relatively large compared with that of the average crystallite size. The powders show a semiconducting behavior with increasing temperature. The higher conductivity obtained for SnO2 prepared by sol-gel method can be attributed to their smaller average crystallite size. XRD of alumina doped powder exhibits finer particles than pure SnO2. TEM images showed that the particles are spherical in shape and consist of a core of SnO2 surrounded by a coating of alumina. The calculated surface area was found to decrease with temperature increases. Due to the effective role of Al2O3 additive as a grain growth inhibitor for the matrix grains, the observed surface area for the coated materials are predominantly higher than for the uncoated materials.
Structure and spectal properties of cinnamoyl pyrones and their vinylogs
Authors: Tykhanov Dmytro , Serikova Irina , Yaremenko Fedor , Roshal Alexander 
Published: March 2010

Abstract
The 1H-NMR and quantum chemical analysis of the stability of tautomers of cinnamoyl pyrone derivatives and vinylogs has been studied. The relationship between the structure of the most stable tautomer and its spectral properties has been investigated. It has been determined that the tautomer of highest stability (88–100 molar %) has an α-pyrone structure and exhibits a trans-conformation in the cinnamoyl fragment. An intense fluorescence of dyes has been observed in non-polar solvents with cinnamoyl fragments having electron-donating substituents or several double bonds in the polymethine chain. A gradient in solvent polarity resulted in fluorescence quenching which permits the use of the dyes as intensometric fluorometric probes for medium polarity examination.
Ionic liquid mediated recyclable sulphonimide based organocatalysis for aldol reaction
Authors: Srivastava Vivek 
Published: March 2010

Abstract
Sulphonimide based organocatalyst was used to catalyze the aldol reaction in ionic liquid media. On the basis of yield and selectivity the ionic liquid mediated system was found superior in comparison with organic solvents. The added advantages of this ionic liquid mediated organocatalysis are easy recovery of product and the recyclability of the organocatalyst.
Synthesis and characterization of temperature-sensitive and biodegradable hydrogel based on N-isopropylacrylamide
Authors: Yu Yueqin , Li Yanshun , Zhu Chunjing , Liu Lingxiu 
Published: March 2010

Abstract
Based on a biodegradable cross-linker, N-maleyl chitosan (N-MACH), a series of Poly(N-isopropylacrylamide) (PNIPAAm) and Poly(N-isopropylacrylamide-co-acrylamide) [P(NIPAAm-co-Am)] hydrogels were prepared, and their lower critical solution temperature (LCST), swelling kinetics, equilibrium swelling ratio in NaCl solution, and enzymatic degradation behavior in simulated gastric fluids (SGF) were discussed. The LCST did not change with different cross-linker contents. By altering the NIPAAm/Am molar ratio of P(NIPAAm-co-Am) hydrogels, the LCST could be increased to 39°C. The LCST of the hydrogel was significantly influenced by the monomer ratio of the NIPAAm/Am but not by the cross-linker content. In the swelling kinetics, all the dry hydrogels exhibited fast swelling behavior, and the swelling ratios were influenced by the cross-linker content and NIPAAm/Am molar ratios. Equilibrium swelling ratio of all the hydrogels decreased with increasing NaCl solution concentration. In enzymatic degradation tests, the weight loss of hydrogels was dependent on the cross-linker contents and the enzyme concentration.
Metallation of tetradentate N2O2 Schiff base with Mn(II), Co(II), Cu(II) and Zn(II): synthesis, characterization and formation constants measurement
Authors: Asadi Mozaffar , Mohammadikish Maryam , Mohammadi Khosro 
Published: March 2010

Abstract
Four Schiff base ligands, salabza-H2 = N,N′-bis(salicylidene)-2-aminobenzylamine, were synthesized by condensation of one mole of 2-aminobenzylamine and two moles of salicylaldehyde and/or two moles of substituted salicylaldehyde (5-OMe, 5-Br, 5-NO2). All the four Schiff bases and their Mn(II), Co(II), Cu(II) and Zn(II) complexes are characterized by UV-Vis, FT-IR, 1H NMR spectroscopy, mass spectrometry and elemental analysis. The formation constants and the Gibbs free energies were measured spectrophotometrically for 1:1 complexes in methanol in constant ionic strength (I = 0.1 mol dm−3 NaClO4) and at 25°C. The data refinement was carried out with the SQUAD program. The trend of formation constants of H2L1 with M(II) follows the order: Mn(II) (3.97)
Also, the trend of formation constants of ligand toward a given metal (for example Mn) is as follows: H2L1 (p-OMe) (3.97) &gt; H2L2 (p-H) (3.65) &gt; H2L3 (p-Br) (3.37) &gt; H2L4 (p-NO2) (3.04)
ZnO-beta zeolite mediated simple and efficient method for the one-pot synthesis of quinoxaline derivatives at room temperature
Authors: Katkar Santosh , Mohite Pravinkumar , Gadekar Lakshman , Arbad Balasaheb , Lande Machhindra 
Published: March 2010

Abstract
A rapid and an efficient one-pot method for the synthesis of quinoxalines catalysed by ZnO-beta zeolite at room temperature is described. This environmentally benign method provides several advantages over methods that are currently employed such as a simple work-up, mild reaction conditions, good to excellent yields, and a process to recover and reuse the catalyst for several cycles with consistent activity.
Spectrophotometric determination of aqueous acidity constants of three azo dyes
Authors: Alizadeh Kamal , Rezaei Behrooz , Maddah Bozorgmehr 
Published: March 2010

Abstract
The two successive steps acidity constants of three azo dye derivatives D1–D3, were determined by a spectrophotometric method using 0.10 M KNO3 as supporting electrolyte in water solvent. The electronic spectra of the compounds were recorded in the course of their pH-metric titration with a standard base solution. The protolytic equilibrium constants can be solved very satisfactorily from absorbance data, by combining the data obtained in the spectrometric determinations with graphic methods as the absorbance diagrams. An A-diagram shows the relative absorbance changes at two wavelengths as a function of the pH. For a one-step system, the absorbance at any wavelength must be proportional to the absorbance at any other wavelength, so an A-diagram for all wavelength combinations for such a system must be linear (rank, s=1). However, if a system is governed by two or more equilibria, the A-diagrams corresponding to multi-step titrations will change direction every time a new equilibrium becomes dominant in the system. Analysis of the each uniform sub-region can then be used in evaluating of the corresponding equilibrium. A-diagrams for all wavelength combinations suggest that these systems have the rank two(s=2). The results revealed that the Ka(1) and Ka(2) values of different azo dyes follow the order D3&gt;D2&gt;D1.
Structure and photocatalytic activity of Ti1−X MX O2 (M = Zr, Co and Mo) synthesized by pulverized solid state technique
Authors: Santhosh S. , Swetha S. , Balakrishna Geetha 
Published: March 2010

Abstract
A set of transition metal doped nanosized TiO2 particles with anatase structure were synthesized by the pulverization method and their ability to photocatalytically degrade the dye Alizarin Red S was investigated. Characterization of the Zr-, Co- and Mo-doped photocatalysts was conducted with the aid of XRD, SEM, EDX, TEM, BET and spectral analysis. X-ray diffraction patterns did not reflect the appearance of any peaks due to dopants, however dopants were observed in SEM-EDX analysis. Particle sizes were in the range of 25 nm as per TEM and XRD analysis. Upon doping, a prominent decrease in surface area was observed. The percentage composition of each of the dopants was confirmed by EDX analysis. Doped samples depicted many mid-bands in the Kubelka Munk plots due to d-d transition of dopants. Experiments were conducted to compare the photocatalytic activity under identical UV and solar light exposure. Zr-doped TiO2 at the molecular scale exhibited better photocatalytic activity in degradation of Alizarin, with a lower band-gap energy that can respond to visible light. However, Co- and Mo-doped TiO2 appeared to suppress the photoactivity. A rise in the number of mid-bands causing effective separation or recombination of charge carriers strongly influences the rate of the degradation process.
Properties of ibuprofen ion-selective electrodes based on the ion pair complex of tetraoctylammonium cation
Authors: Lenik Joanna , Wardak Cecylia 
Published: March 2010

Abstract
Ibuprofen membrane electrodes based on different plasticizers: diisobutyl phthalate (DIBP), o-nitrophenyloctyl ether (o-NPOE), dioctyl sebacate (DOS) and tetraoctylammonium 2-(4-isobutylphenyl)propionate were prepared. All electrodes show: a near Nernstian slope of characteristic (58.3–60.9 mV decade−1) in the measurement range (10−4–10−1 mol L−1), limit of detection (5.0×10−5 mol L−1), really long lifetime (12 months), dependence of the electrode potential on pH (5.5–9.0), reproducibility of potential (0.6–1.2 mV) and selectivity coefficients in relation to some organic and inorganic anions. The electrodes were applied for the determination of ibuprofen in tablets by the calibration curve method and the standard addition method.
Fabrication and magnetic properties of hierarchical nickel microwires with nanothorns
Authors: Zhang Junhao , Yang Ling , Cheng Xiaofang , Zhang Jinmeng , Li Fucai 
Published: March 2010

Abstract
Hierarchical nickel microwires with nanothorns were fabricated through a reduction of nickelous salt with hydrazine in diethanolamine. The product was characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDS). The growth mechanism of the nickel microwires with nanothorns is proposed, based on the evolution of the structures and morphologies, which could be ascribed to the cooperative effect of the complexant of diethanolamine and inherent magnetic interactions. Magnetic properties of the product were measured at room temperature and compared with other shaped counterparts.
Application of a macromolecular micellar system formed by the P123 triblock copolymer for determination of copper concentrations
Authors: Lemos Leandro , Silva Luis , Silva Maria , Amim Jorge , Coimbra Jane , Minim Luis 
Published: March 2010

Abstract
This work proposes a method for determination Cu(II) concentrations, based on the formation of a copper-1-nitroso-2-naphthol complex, in the presence of micelles; formed by a triblock copolymer, made up of two blocks of polyethylene oxide (PEO), and one block of polypropylene oxide (PPO). The insoluble copper complexes, are concentrated inside the hydrophobic micelle core; formed by the PPO block. For a solution containing 0.200 mg L−1 Cu(II), the proposed method had a relative standard deviation of 2.0% (n = 3); an absolute error from 0.11 to 0.39 mg L−1; and a linear calibration range, from 0.200 to 0.800 mg L−1. Detection and quantification limits, were 43.1 mg L−1 and 144 mg L−1, respectively. We show that there is excellent agreement, between the results obtained using our novel method; and those obtained using flame atomic absorption spectrometry: In the determination of Cu(II) concentrations, in Brazilian sugar-cane spirits. The proposed method, is the first to apply macromolecular micelle systems, to the determination of copper concentrations; and improves upon the results obtained using molecular surfactants. This method is environmentally friendly (since it does not use any organic solvents for extraction), and the triblock copolymer is biodegradable and non-toxic.