bluuebunny/crossref_metadata_2025_split huggingface dataset:
Flood‐Pulse Effects on Zooplankton Assemblages in a River‐Floodplain System (Gemenc Floodplain of the Danube, Hungary)
Authors: Schöll Károly , Kiss Anita , Dinka Mária , Berczik Árpád 
Published: February 2012

AbstractWe studied the structure and population dynamics of zooplankton assemblages in the water bodies (eu‐, para‐, plesiopotamal and conjunctive water bodies) of a temperate floodplain during flood events. Here we report differences in the species composition of these water bodies in the two stages of flood pulses: rising vs. receding. During the receding period the proportion of larger and tychoplanktonic species increased. Similarity among zooplankton assemblages of these floodplain water bodies increased during the rising and decreased during the receding period. Species richness, diversity and population density values of zooplankton assemblages increased during the receding period in all types of water bodies except the eupotamal. The guild ratio of rotifer assemblages showed characteristic, but somewhat ambiguous changes. We conclude that the hydrological regime affects the structure and dynamics of zooplankton assemblages on the floodplain. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Patterning Zooplankton Communities in Accordance with Annual Climatic Conditions in a Regulated River System (Nakdong River, South Korea)
Authors: Kim Dong‐Kyun , Jeong Kwang‐Seuk , Chang Kwang‐Hyeon , La Geung‐Hwan , Joo Gea‐Jae , Kim Hyun‐Woo 
Published: February 2012

AbstractIn this study, we investigated what environmental factors mainly influence the pattern of zooplankton communities in the regulated Nakdong River. Fifteen years of data (N = 629, 1994 to 2008) were used to analyze the patterns by means of self‐organizing map (SOM), that is capable of extracting information through competitive and adaptive properties. A total of 34 variables (18 groups of zooplankton and 16 physicochemical parameters) were patterned onto the SOM, and then each variable was compared in accordance with three different annual rainfall patterns (i.e., dry, moderate, and wet). Finally, seven clusters were categorized according to Euclidian distance between the clusters on the SOM. Clear seasonal features for the variables were interpreted in five major categories, and two more subcategories were partitioned by a specific feature of zooplankton abundance and appearance. In the result, the patterns of zooplankton assemblage were mainly distinguished by water temperature, Secchi transparency, and river flow rate. In particular, the SOM result depicted a clear pattern of zooplankton assemblage clusters partitioned by annual precipitation, which accentuated the prolonged effect of dam regulation on plankton assemblage in a regulated river system. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Product costing systems: Finding the right approach
Authors: Fisher Joseph G. , Krumwiede Kip 
Published: February 2012

AbstractMany product costing methods and systems exist, but having the right costing system for a given situation can be difficult. This article identifies four key questions to answer and points out the advantages and disadvantages of various cost systems to find the right balance of convenience, correctness, and implementation costs in a product costing system. Nestlé, for example, discovered that good product management, aided by better cost systems, can pay major dividends. © 2012 Wiley Periodicals, Inc.
Theoretical investigation on the photophysical properties of N‐heterocyclic carbene iridium (III) complexes (fpmb)xIr(bptz)3‐x (x = 1−2)
Authors: Cao Qi , Wang Jing , Tian Zhao‐Shuo , Xie Zai‐Feng , Bai Fu‐Quan 
Published: February 2012

AbstractIn the search for efficiently phosphorescent materials, this article presents a rational design and theoretical comparative study of some photophysical properties in the (fpmb)xIr(bptz)3‐x (x = 1–2), which involve the usage of two 2‐pyridyl triazolate (bptz) chromophores and a strong‐field ligand fpmb (fpmb = 1‐(4‐difluorobenzyl)‐3‐methylbenzimidazolium). The first principle theoretical analysis under the framework of the time‐dependent density functional theory approach is implemented in this article to investigate the electronic structures, absorption and phosphorescence spectra. It is intriguing to note that 1 and 2 exhibit theirs blue phosphorescent emissions with maxima at 504 and 516 nm, respectively. Furthermore, to obtain the mechanism of low phosphorescence yield in 1 and estimate the radiative rate constant kr for 2, we approximately measure the radiative rate constant kr, the spin‐orbital coupling (SOC) value, ΔE (S − T), and the square of the SOC matrix element (<ΨS1.HSO.ΨT1>2) for 1 and 2. Finally, we tentatively come to conclusion that the switch of the cyclometalated ligand from the main to ancillary chelate seems to lower the splitting ΔE (S − T) in the current system. © 2012 Wiley Periodicals, Inc. J Comput Chem, 2012
EPA covalently bound to smooth titanium surfaces decreases viability and biofilm formation of Staphylococcus epidermidis in vitro
Authors: Petzold Christiane , Gomez‐Florit Manuel , Lyngstadaas Ståle Petter , Monjo Marta 
Published: February 2012

AbstractColonization of implant surfaces with bacteria should ideally be prevented right from implantation, as bacteria attaching to the surface will form a biofilm, being then well protected against antibiotic treatment. Therefore, implant coatings should combine antibacterial properties with biocompatibility towards their host tissue. We tested a UV‐induced covalent coating procedure with eicosapentaenoic acid (EPA) for smooth titanium (Ti) surfaces for its ability to prevent attachment and proliferation of Staphylococcus epidermidis and to allow mineralization of MC3T3‐E1 osteoblasts. Bacterial initial attachment was highest for EPA‐coated surfaces, but was reduced by vigorous washing, possibly due to low adhesive strength on those surfaces. We found an increase in the ratio of dead bacteria and in overall biofilm after 16 h on Ti surfaces with covalently bound EPA compared to Ti. The UV‐induced EPA coating did not impair the ability of MC3T3‐E1 preosteoblasts to mineralize, while a reduction in mineralization could be found for UV‐irradiated Ti surfaces and UV‐irradiated surfaces washed with ethanol compared to Ti. Although in vivo studies are needed to evaluate the clinical significance, our results indicate that covalent coating of Ti surfaces with EPA by UV irradiation decreases the survival of S. epidermidis and maintains the mineralization ability of osteoblasts. © 2012 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 30:1384–1390, 2012
Medullary thyroid carcinoma with nodular goiter carries an excellent prognosis
Authors: Xu Lai , Wang Wei‐Bin , Zhao Yu‐Pei , Zhang Tai‐Ping , Liao Quan , Chen Ge , Zhou Li , Shu Hong 
Published: February 2012

AbstractBackgroundIn our institution, patients with medullary thyroid carcinoma (MTC) concurrent with nodular goiter (NG) have a nearly 100% survival rate, but the reasons and characteristics are unclear.MethodsEighty patients with MTC who underwent surgery in our center between 1971 and 2011 were reviewed.ResultsA total of 21 MTC/NG and 59 MTC only patients were identified. The stage of the two groups had no significant difference (P = 0.13). The MTC/NG group had lower preoperative serum calcitonin (CT) levels (914.7 ng/L vs. 1162.6 ng/L, P = 0.003), lower postoperative serum CT levels (371.4 ng/L vs. 582.5 ng/L, P < 0.001), lower carcinoembryonic antigen levels (18.3 ng/ml vs. 130.5 ng/ml, P < 0.001), a lower propensity toward lymph node metastasis (40.0% vs. 66.7%, P = 0.07), and a lower proportion of multifocality (19.1% vs. 42.4%, P = 0.06), capsular invasion (9.5% vs. 25.4%, P = 0.21), and vascular invasion (4.8% vs. 10.1%, P = 0.67). The mean tumor diameter of the two groups was similar (20.3 mm vs. 22.1 mm, P = 0.6). Overall 15‐year survival in MTC/NG versus MTC only groups was 100% versus 57.0% (P = 0.03).ConclusionsMTC with NG is an indolent disease and has an excellent prognosis. The only independent predictor of survival was the TNM stage of disease. J. Surg. Oncol. 2012; 106:169–173. © 2012 Wiley Periodicals, Inc.
Stress, coping, and mental health‐seeking behaviors: Gender differences in OEF/OIF health care providers
Authors: Gibbons Susanne W. , Barnett Scott D. , Hickling Edward J. , Herbig‐Wall Pamela L. , Watts Dorraine D. 
Published: February 2012

AbstractHealth care providers (HCPs) are often placed in positions of heightened stress when serving in military operations. As military HCPs have a large number of female providers, there is a concern that gender may influence both risk and resiliency within the health care provider subgroup. The purpose of this secondary analysis of the 2005 Department of Defense Survey of Health Related Behaviors Among Active Duty Military Personnel (data collected April through August 2005) is to describe stress, coping, and health‐seeking behaviors of Operation Enduring Freedom and Operation Iraqi Freedom deployed military health care providers and the role gender may have for both health care officers and specialists. Female HCP responses indicate the lives of these women are significantly impacted by their family responsibilities. Reluctance of females to seek mental health care is concerning with perhaps more concern over career than personal well‐being. Findings included (a) concern about performance, odds ratio (OR) = 1.86, 95% confidence interval (CI) [0.43, 8.12] for enlisted females, OR = 2.83, 95% CI [0.31, 25.66] for female officers; (b) problems with money, OR = 1.6 CI [0.69, 3.7] for enlisted females; (c) having a drink to cope, OR = 3.26, 95% CI [0.22, 48.68] for enlisted females; and (d) damage military career to seek mental health care, OR = 1.78, 95% CI [0.59, 5.39] for female officers. Results indicate needed provider awareness concerning mental health‐seeking behavior and sensitivity toward gender differences that contribute to unique manifestations of operational stress outcomes.
Identifying, describing, and expressing emotions after critical incidents in paramedics
Authors: Halpern Janice , Maunder Robert G. , Schwartz Brian , Gurevich Maria 
Published: February 2012

AbstractFor paramedics, critical incidents evoke intense emotions and may result in later psychological difficulties. We examined 2 ways to deal with emotions after critical incidents: (a) identifying emotions, and (b) describing and expressing emotions, and their association with recovery from acute stress and psychological symptoms. We surveyed 190 paramedics, examining how impaired capacity to identify and describe emotions (alexithymia) and voluntary expression of emotions during contacts with others in the first 24 hours after the incident were associated with recovery from acute stress and current symptoms of PTSD, depression, burnout, and somatization. Overall alexithymia was not associated with recovery, but the component of difficulty identifying feelings was associated with prolonged physical arousal (χ2 = 10.1, p = .007). Overall alexithymia and all its components were associated with virtually all current symptoms (correlation coefficients .23–.38, p < .05). Voluntary emotional expression was unrelated to current symptoms. Greater emotional expression was related to greater perceived helpfulness of contacts (χ2 = 56.8, p < .001). This suggests that identifying emotions may be important in managing occupational stress in paramedics. In contrast, voluntary emotional expression, although perceived as helpful, may not prevent symptoms. These findings may inform education for paramedics in dealing with stress.
Does physiologic response to loud tones change following cognitive–behavioral treatment for posttraumatic stress disorder?
Authors: Griffin Michael G. , Resick Patricia A. , Galovski Tara E. 
Published: February 2012

AbstractThis study examined responses to loud tones before and after cognitive–behavioral treatment for posttraumatic stress disorder (PTSD). Seventy‐four women in a PTSD treatment outcome study for rape‐related (n = 54) or physical assault‐related PTSD (n = 20) were assessed in an auditory loud tone paradigm. Assessments were conducted before and after a 6‐week period of cognitive–behavioral therapy. Physiologic responses to loud tones included heart rate (HR), skin conductance (SC), and eye‐blink electromyogram (EMG). Groups were formed based upon treatment outcome and included a treatment responder group (no PTSD at posttreatment) and a nonresponder group (PTSD‐positive at posttreatment). Treatment was successful for 53 of 74 women (72%) and unsuccessful for 21 women (28%). Responders and nonresponders were not significantly different from each other at pretreatment on the main outcome variables. Treatment responders showed a significant reduction in loud tone‐related EMG, HR, and SC responses from pre‐ to posttreatment (partial η2 = .24, .31, and .36, respectively; all p < .001) and the EMG and HR responses were significantly smaller than nonresponders at posttreatment (partial η2 = .11, p = .004 and .19, p < .001, respectively). Successful cognitive–behavioral treatment of PTSD is associated with a quantifiable reduction in physiological responding to loud tones.
The impact of head injury mechanism on mental health symptoms in veterans: Do number and type of exposures matter?
Authors: Maguen Shira , Madden Erin , Lau Karen M. , Seal Karen 
Published: February 2012

AbstractThis study examined the association between screening results for mental health problems and the number and type of head injuries in 1,082 Iraq and Afghanistan War veterans who received population‐based screening for traumatic brain injury at a Veterans Administration health care facility. Nearly one third of all veterans reported multiple types of head injuries (median = 1 among those with any head injury, range = 1–6 types of head injury). Veterans reporting multiple head injury mechanisms had 6 times the odds of screening positive for posttraumatic stress disorder (PTSD), adjusted odds ratio (OR) = 6.15, 95% confidence interval (CI) [4.4, 8.7], p < .001, over 4 times the odds of screening positive for depression, adjusted OR = 4.09, 95% CI [2.8, 5.9], p < .001, and about twice the odds of screening positive for alcohol misuse, adjusted OR = 1.64, 95% CI [1.19, 2.3], p = .003, compared to those without head injuries. Veterans reporting a blast plus another head injury mechanism had higher odds of screening positive for all mental health outcomes than any other group (e.g., compared to no head injury group): PTSD, adjusted OR = 6.52, 95% CI [4.6, 9.3], p < .001; depression, adjusted OR = 4.42, 95% CI [3.0, 6.4], p < .001; alcohol misuse, adjusted OR =1.59, 95% CI [1.14, 2.2], p = .006. Given their association with a variety of mental health outcomes, number and type of head injury mechanism should be considered as part of any postdeployment evaluation.
Modeling the combustion of high molecular weight fuels by a functional group approach
Authors: Mehl M. , Pitz W. J. , Sarathy S. M. , Westbrook C. K. 
Published: February 2012

AbstractModeling the combustion behavior of real fuels is a challenging task: Significant analytical efforts are required to characterize the fuel composition, and comprehensive kinetic models are necessary to reproduce the behavior of the different fuel components. Both these aspects become increasingly critical for fuels having a high molecular weight, wherein both the characterization of the single components and the kinetics involved in their oxidation become extremely complex. Indeed, kinetic models for large hydrocarbons can include thousands of species and tens of thousands of reactions. For these reasons, only a limited number of representative components are generally included in the simulations and these large kinetic mechanisms are reduced to simulate the behavior of real fuels in practical conditions. We propose a novel approach to the simulation of the combustion of high molecular weight fuels, wherein the fuel surrogate is defined in terms of pseudospecies including the functional groups contained in the actual fuel. These pseudocomponents, representing linear, branched, aromatic, saturated, and unsaturated structures, can undergo the typical reactions responsible for the low‐temperature ignition of hydrocarbon as well as the interactions occurring in fuel blends. The basics of this concept will be presented, through application to linear and branched alkanes, and the potential of this approach is assessed by means of comparisons with experimental data and detailed kinetic simulations. The potential of this methodology for reducing computational expense in computational fluid dynamics simulations is also highlighted. © 2012 Wiley Periodicals, Inc. Int J Chem Kinet 44: 257–276, 2012
A Water‐Soluble Polycarbonate With Dimethylamino Pendant Groups Prepared by Enzyme‐Catalyzed Ring‐Opening Polymerization
Authors: Zhang Xiaojin , Cai Mengmeng , Zhong Zhenlin , Zhuo Renxi 
Published: February 2012

AbstractA water‐soluble polycarbonate with dimethylamino pendant groups, poly(2‐dimethylaminotrimethylene carbonate) (PDMATC), is synthesized and characterized. First, the six‐membered carbonate monomer, 2‐dimethylaminotrimethylene carbonate (DMATC), is prepared via the cyclization reaction of 2‐(dimethylamino)propane‐1,3‐diol with triphosgene in the presence of triethylamine. Although the attempted ring‐opening polymerization (ROP) of DMATC with Sn(Oct)2 as a catalyst fails, the ROP of DMATC is successfully carried out with Novozym‐435 as a catalyst to give water‐soluble aliphatic polycarbonate PDMATC with low cytotoxicity and good degradability.
Bio‐Orthogonal Polymer Coatings for Co‐Presentation of Biomolecules
Authors: Deng Xiaopei , Eyster Thomas W. , Elkasabi Yaseen , Lahann Joerg 
Published: February 2012

AbstractControlled presentation of biomolecules on synthetic substrates is an important aspect for biomaterials development. If the immobilization of multiple biomolecules is required, highly efficient orthogonal surface chemistries are needed to ensure the precision of the immobilization. In this communication, chemical vapor deposition (CVD) copolymerization is used to fabricate polymer coatings with controlled ratio of alkyne and pentafluorophenyl ester (Pfp‐ester) groups. Cyclic argine‐glycine‐aspartic acid (cRGD) adhesion peptide and epidermal growth factor (EGF) are immobilized through alkyne–azide cycloaddtion (“click” chemistry) and active ester–amine reaction, respectively. Cell studies with human umbilical vein endothelial cells (HUVEC) and A431 cell lines demonstrate the biological activity of the coimmobilized biomolecules.
Hierarchical Mesoporous Silica Fabricated from an ABC Triblock Terpolymer as a Single Template
Authors: Li Jheng‐Guang , Lin Ruei‐Bin , Kuo Shiao‐Wei 
Published: February 2012

AbstractHierarchical mesoporous silicas containing two kinds of mesoporous size are successfully synthesized using the simple evaporation‐induced self‐assembly (EISA) strategy. Two blocks of hydrophobic segments (PE and PCL) in the poly(ethylene‐block‐ethylene oxide‐block‐ϵ‐caprolactone) (PE‐PEO‐PCL) triblock copolymer are involved in the two types of mesopore after calcination, the PE segment being attributed to the face‐centered cubic (fcc) morphology (spherical pores) and the PCL segment attributed to the tetragonal cylinder structure (cylindrical pores).
Inverse Suspension Polymerization as a New Tool for the Synthesis of Ion‐Imprinted Polymers
Authors: Meouche Walid , Branger Catherine , Beurroies Isabelle , Denoyel Renaud , Margaillan André 
Published: February 2012

AbstractIon‐imprinted polymer beads are prepared for the first time by inverse suspension polymerization in mineral oil using nickel(II) as the template ion. As water is not used as the continuous phase, this new route of synthesis avoids the risk that the ion template leaves the suspension for the aqueous phase. The leaching of nickel from the resin beads is very good due to the large porosity of the polymer beads. The ratio between the ligand and the crosslinker has been increased leading to higher adsorption capacities. Comparing these values with those of the non‐imprinted polymers and studying the effect of some interfering ions proves that an optimum can be found for the ratio ligand/crosslinker.
TERT's role in colorectal carcinogenesis
Authors: Pellatt Andrew J. , Wolff Roger K. , Herrick Jennifer , Lundgreen Abbie , Slattery Martha L. 
Published: February 2012

AbstractTelomerase reverse transcriptase (TERT) is one of the main functional subunits of the telomerase enzyme, which functions to increase telomere length. Studies have suggested that TERT may be important to the etiology of colorectal cancer. In this study we evaluate seven TERT SNPs in 1555 incident colon cancer cases and 1956 matched controls and in 754 incident rectal cancer cases and 959 matched controls. We observed that two TERT SNPs were associated with colon cancer. TERT rs2736118 was associated with increased risk of colon cancer (OR = 1.31, 95% CI 1.02, 1.69) and TERT‐CLPTM1L rs2853668 was inversely associated with colon cancer (OR = 0.71, 95% CI 0.55, 0.92). TERT‐CLPTM1L rs2853668 also was inversely associated with rectal cancer (OR 0.62, 95% CI 0.43, 0.90). BMI interacted significantly with three TERT SNPs to alter risk of colon cancer. Those with the variant allele and who were obese had the greatest risk of colon cancer. TERT‐CLPTM1L rs2853668 interacted significantly with aspirin/NSAID use, where those with the AA genotype had a much lower risk of colon cancer when using aspirin/NSAIDs than those with the other genotypes. Several TERT SNPs were uniquely associated with CIMP+ and MSI tumors. These data confirm earlier reports of the association between TERT‐CLPTM1L and colon and rectal cancer. Our detection of a significant interaction with BMI for multiple TERT SNPs and unique associations with CIMP+ tumors enhance our understanding of TERT's role in colon carcinogenesis. © 2012 Wiley Periodicals, Inc.
Integer models and upper bounds for the 3‐club problem
Authors: Almeida Maria Teresa , Carvalho Filipa D. 
Published: February 2012

AbstractGiven an undirected graph, the k ‐club problem seeks a maximum cardinality subset of nodes that induces a subgraph with diameter at most k. We present two new formulations for the 3‐club problem: one is compact and the other has a nonpolynomial number of constraints. By defining an integer compact relaxation of the second formulation, we obtain a new upper bound on the 3‐club optimum that improves on the 3‐clique number bound. We derive new families of valid inequalities for the 3‐club polytope and use them to strengthen the LP relaxations of the new models. The computational study is performed on 120 graphs with up to 200 nodes and edge densities reported in the literature to produce difficult instances of the 3‐club problem. The results show that the new compact formulation is competitive with the exact solution methods reported in the literature, and that a large proportion of the LP gap is bridged with the new valid inequalities. © 2012 Wiley Periodicals, Inc. NETWORKS, 2012
Clofarabine in pediatric acute leukemia: Current findings and issues
Authors: Hijiya Nobuko , Barry Elly , Arceci Robert J. 
Published: February 2012

AbstractClofarabine is a second‐generation purine nucleoside analog and has significant anti‐leukemic activity as a single agent. It is approved by the United States Food and Drug Administration (FDA) for the treatment of relapsed or refractory acute lymphoblastic leukemia (ALL) in children. Combinations of clofarabine with purine nucleoside analogs or DNA‐damaging agents have been investigated utilizing synergistic effects and now tested in a number of studies including a frontline study. In this article, we review the development of clofarabine, rationale and history of combination regimens, and their potential roles and toxicities in the treatment of pediatric ALL that are important to treating clinicians. Pediatr Blood Cancer 2012;59:417–422. © 2012 Wiley Periodicals, Inc.