bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cation–π interactions of methylated ammonium ions: A quantum mechanical study
Authors: Rapp Chaya , Goldberger Elizabeth , Tishbi Nasim , Kirshenbaum Rachel 
Published: January 2014

ABSTRACTCation–π interactions of methylated ammonium ions play a key role in a broad range of biochemical systems. These include methyl‐lysine binding proteins which bind to methylated sites on histone proteins, lysine demethylase enzymes which demethylate these sites, and neurotransmitter receptor complexes which bind choline‐derived ligands. Recognition in these systems is achieved through an ‘aromatic cage’ motif in the binding site. Here we use high‐level quantum mechanical calculations to address how cation–π interactions of methylated ammonium ions are modulated by a change in methylation state and interaction geometry. We survey methyl‐lysine and choline‐derived complexes in the Protein Databank to validate our results against available structural data. A quantitative description of cation–π interactions of methylated ammonium systems is critical to structure‐based efforts to target methyl‐lysine binding proteins and demethylase enzymes in the treatment of unregulated transcriptional control, and neurotransmitter receptors in the treatment of neurological disease. It is our hope that our work will serve as a benchmark for the development of physical chemistry based force fields that can accurately model the contribution of cation–π interactions to binding and specificity in these systems. Proteins 2014; 82:1494–1502. © 2014 Wiley Periodicals, Inc.
Structural evidence for a constrained conformation of short CDR‐L3 in antibodies
Authors: Teplyakov Alexey , Obmolova Galina , Malia Thomas J. , Luo Jinquan , Gilliland Gary L. 
Published: January 2014

ABSTRACTThree Fab structures used as targets in the Antibody Modeling Assessment presented a challenge for modeling CDR‐L3 due to deviations from the most typical canonical structure. In all three antibodies CDR‐L3 has eight residues, which is one residue shorter than usual, and has a conformation that is rarely observed in crystal structures. We analyzed the sequence and structural determinants of this conformation and found that the “short” CDR‐L3 is remarkably rigid and retains the conformation in the interactions with antigens and neighboring CDRs. Proteins 2014; 82:1679–1683. © 2014 Wiley Periodicals, Inc.
The response of the Pacific storm track and atmospheric circulation to Kuroshio Extension variability
Authors: O'Reilly Christopher H. , Czaja Arnaud 
Published: January 2014

An index of the Kuroshio Extension front strength is produced using a maximum covariance analysis between sea‐surface temperature (SST) and sea‐surface height (SSH) gradient observations, and composites of the atmospheric state are presented during its positive and negative phases using reanalysis data (1992–2011).It is found that when the Kuroshio Extension is less (more) meandering, with a stronger (weaker) SST front, the atmospheric heat transport by transient eddies is increased in the western (eastern) Pacific region, consistent with an increase (decrease) in low‐level baroclinicity. Analysis of the eddy–mean flow interaction shows that this zonal shift in heat transport forces anomalous barotropic flow in the Eastern Pacific, where blocking frequency is strongly influenced.The above relationships cannot be reconciled with the known response of the North Pacific storm track to remote forcing from the Tropical Pacific, nor can they be explained by the response of the ocean to atmospheric forcing via surface heat fluxes or winds. Rather, the zonal shift in the storm track highlighted here, and the associated changes in the large‐scale circulation, are interpreted as a response to the interannual variability of the Kuroshio Extension front.
A terabit/second satellite system for European broadband access: a feasibility study
Authors: Kyrgiazos Argyrios , Evans Barry , Thompson Paul , Mathiopoulos P. Takis , Papaharalabos Stylianos 
Published: January 2014

SUMMARYThis paper presents a feasibility study for a fixed broadband access High Throughput Satellite terabit/second system by considering appropriate state‐of‐the‐art communication technologies. For the investigated system model, DVB‐S2 and DVB‐RCS2 are assumed as the air interfaces for the forward and return link, respectively. The performance of DVB‐S2 and DVB‐RCS2 Adaptive Coding and Modulation is examined along with potential extensions of these standards. For example, the performance of very low rate DVB‐RCS turbo codes are investigated and their performance is evaluated. In addition, a performance comparison for M‐ary (M=16, 32, 64) constellations in the presence of a linear and a high power amplifier non‐linear channel is carried out. Various frequency reuse schemes and different antenna models are also considered, and their performance is analyzed and evaluated. It is demonstrated that, by using the Q/V (40/50 GHz) bands for the gateways and the Ka (20–30 GHz) band for the user terminals, around 20 gateways and 200 beams are required to provide with the proposed satellite system terabit/second capacity. The obtained performance evaluation results have shown that the forward link is limited by noise rather than interference, whereas the return link is interference limited. Additionally, some further aspects of the system design in relation with the total number of gateways and the payload are discussed. Copyright © 2014 John Wiley & Sons, Ltd.
Production of Glycolipid Biosurfactant from Sponge‐Associated Marine ActinobacteriumBrachybacterium paraconglomeratumMSA21
Authors: Kiran George S. , Sabarathnam Balu , Thajuddin Nooruddin , Selvin Joseph 
Published: January 2014

AbstractPotential biosurfactant producers and economic production processes are major considerations for commercialization of biosurfactants. The present study was aimed at exploring marine Actinobacteria for the production of biosurfactants using industrial and agro‐industrial wastes under solid state culture (SSC). A biosurfactant producer,Brachybacterium paraconglomeratumMSA21 was isolated from a marine sponge. The strain MSA21 effectively utilized tannery pre‐treated effluent as the substrate for the production of a biosurfactant under SSC. The critical control factors influence the production of biosurfactant includes glucose, yeast extract, copper sulfate and inoculum size. The glucose and yeast extract interactively increase the production maxima over a stable area. The surface active compound was characterized as a glycolipid derivative with a hydrophilic part of methyl‐2‐oxopropyl furan and a hydrophobic dodecanoic acid, methyl ester. The MSA21 biosurfactant displayed antibiotic activity. The domain ketosynthase in MSA21 showed that the polyketide synthase gene might be involved in the synthesis of antimicrobial compounds. The strainB. paraconglomeratumMSA21 could be used for the production of a biosurfactant as a green alternative to replace chemical surfactants.
LCP 140° Pediatric Hip Plate for fixation of proximal femoral valgisation osteotomy
Authors: Sidler-Maier Claudia C. , Reidy Kerstin , Huber Hanspeter , Dierauer Stefan , Ramseier Leonhard E. 
Published: January 2014

Purpose Femoral osteotomy is one of the most widely performed reconstructive operations in pediatric orthopedic surgery. Many implants for fixation have been used, but so far there is no literature about the application and outcome of the LCP 140° Pediatric Hip Plate for proximal femoral valgisation in children. Methods Data of patients with a valgisation of the proximal femur using the LCP 140° Pediatric Hip Plate between February 2011 and July 2012 were retrospectively collected and analyzed. Results We included 10 patients (11 hips) with a mean follow-up of 15.3 ± 6.3 months (range 5.6–23 months). The mean age was 9.6 ± 1.2 years (range 7.3–11.8 years) with a mean hospital stay of 5.2 ± 1.7 days (range 3–9 days). Callus formation was observed in all cases at 6 weeks postoperative control and consolidation was shown after a mean time of 14.1 ± 2.3 weeks (range 12.1–19.1 weeks). There was no delayed union or any case of non-union in our series. The stability of the operative reduction including the corrected neck-shaft angle (mean 19° ± 7.9°; range 10.5°–38.5°) was maintained during the follow-up period. No cases of recurrence (varisation) or complications requiring further treatment or revision were observed. Conclusions In our series, the 140° LCP Pediatric Hip Plate was shown to be safe and applicable in the clinical setting with good results. We therefore consider this device to be valuable for the correction of pathologic varus conditions of the proximal femur in children.
Container management in a single-vendor-multiple-buyer supply chain
Authors: Glock Christoph H. , Kim Taebok 
Published: January 2014

Abstract
This paper studies a supply chain consisting of a single vendor and multiple retailers that uses returnable transport items, such as containers or crates, to facilitate shipping products from the vendor to the retailers. The paper considers two different strategies for transporting finished products from the supplier to the retailers: In case of early shipments, deliveries to a retailer can be made while the production process at the supplier is still in progress, while in the case of late shipments, the supplier has to wait until the entire production lot has been finished before shipments can be made from the lot. The paper develops mathematical models for both strategies and derives optimal solutions for the cycle time, the container size, the individual order quantities of the retailers and the shipment sequence with the intention to minimize the average total costs of the system. The behavior of the models is analyzed with the help of numerical examples.
The Sarbanes-Oxley Act, Earnings Management, and Post-Buyback Performance of Open-Market Repurchasing Firms
Authors: Chen Sheng-Syan , Huang Chia-Wei 
Published: January 2014

AbstractWe examine how the Sarbanes-Oxley Act (SOX) affects pre-repurchase earnings management and its association with post-repurchase firm performance. Unlike prior pre-SOX studies, our post-SOX results indicate that open-market repurchasers do not engage in pre-buyback downward accrual-based earnings management. Audit committee independence, reforms in corporate governance structures, and changes in executives’ equity holdings prompted by SOX may explain the findings. Post-SOX, the significant negative association between pre-repurchase abnormal accruals and post-repurchase performance disappears, the market reaction to repurchase announcements becomes significantly less favorable, and there is no evidence of any shift away from accrual-based to real earnings management.
Maxillary sinus atelectasis (silent sinus syndrome): treatment with balloon sinuplasty
Authors: Kilty S J 
Published: January 2014

AbstractIntroduction:Maxillary sinus atelectasis is a form of chronic rhinosinusitis of uncertain aetiology. Previously, the conventional treatment for this condition has been standard endoscopic surgery. There are no reports in the literature of successful treatment using balloon sinuplasty.Methods:A case of a patient with right maxillary sinus atelectasis is presented, who was treated using the balloon sinuplasty technique.Results:The patient's right maxillary sinus atelectasis was successfully treated using balloon sinuplasty. Three-month follow-up evaluation documented retention of the remodelled form of the uncinate process, and of maxillary sinus os patency.Conclusion:This is the first report of successful use of the balloon sinuplasty technique for the treatment of maxillary sinus atelectasis. Follow up demonstrated resolution of the underlying pathophysiology. Further study of the balloon sinuplasty technique for the treatment of maxillary sinus atelectasis is required to determine whether it has widespread applicability, given the current standard treatment.
A novel, computed tomography guided, trans-cutaneous approach to treat refractory autophony in a patient with a patulous eustachian tube
Authors: Rodrigues J C L , Waddell A , Cook J-L 
Published: January 2014

AbstractObjective:We report a novel, computed tomography guided treatment for autophony associated with a patulous eustachian tube.Methods:Case report and literature review of the management of patulous eustachian tube.Results:A 36-year-old woman presented with disabling autophony. Otoscopic examination revealed a poorly mobile right tympanic membrane. High resolution temporal bone computed tomography excluded superior semicircular canal dehiscence. The patient was diagnosed with patulous eustachian tube but failed to achieve therapeutic benefit from conventional endoscopic placement of a silicone elastomer suspension implant adjacent to the eustachian tube. Subsequently, she underwent further silicone elastomer suspension implant placement via a trans-cutaneous, computed tomography guided approach. The patient achieved prompt symptomatic relief and remained symptom-free at six-month follow up.Conclusion:This is the first published description of treatment of patulous eustachian tube using a computed tomography guided, trans-cutaneous approach. It serves to highlight to otolaryngologists the fact that computed tomography guided treatment of patulous eustachian tube may control disabling symptoms in patients who have failed to respond to convention endoscopic management.
Do anxiety symptoms predict major depressive disorder in midlife women? The Study of Women's Health Across the Nation (SWAN) Mental Health Study (MHS)
Authors: Kravitz H. M. , Schott L. L. , Joffe H. , Cyranowski J. M. , Bromberger J. T. 
Published: January 2014

BackgroundIn women, anxiety symptoms are common and increase during midlife, but little is known about whether these symptoms predict onsets of major depressive disorder (MDD) episodes. We examined whether anxiety symptoms are associated with subsequent episodes of MDD in midlife African-American and Caucasian women, and whether they confer a different risk for first versus recurrent MDD episodes.MethodA longitudinal analysis was conducted using 12 years of data from the Study of Women's Health Across the Nation (SWAN) Mental Health Study (MHS). The baseline sample comprised 425 Caucasian (n = 278) and African American (n = 147) community-dwelling women, aged 46.1 ± 2.5 years. Anxiety symptoms measured annually using a self-report questionnaire were examined in relation to MDD episodes in the subsequent year, assessed with the SCID. Multivariable models were estimated with random effects logistic regression.ResultsHigher anxiety symptoms scores were associated with a significantly higher adjusted odds of developing an episode of MDD at the subsequent annual visit [odds ratio (OR) 1.47,p = 0.01], specifically for a recurrent episode (OR 1.49,p = 0.03) but non-significant for a first episode (OR 1.32,p = 0.27). There were no significant racial effects in the association between anxiety symptoms and subsequent MDD episodes.ConclusionsAnxiety symptoms often precede MDD and may increase the vulnerability of midlife women to depressive episodes, particularly recurrences. Women with anxiety symptoms should be monitored clinically during the ensuing year for the development of an MDD episode.
Notes on the distribution, climate and flora of the sand deserts of Iran and Afghanistan
Authors: Freitag H. 
Published: January 2014

SynopsisAn account is given of the distribution of the sand deserts in Iran, Afghanistan and Pakistan Baluchistan, where they cover large surfaces on the plains at low and medium altitudes. Climatologically they differ considerably from each other with respect to winter temperatures, but the latitudinal sequence is obscured by elevation effects. About one half to one third of the species are strict psammophytes; structurally they are the most important components of the different plant communities and in mobile sands usually no other plants occur. Their phytogeographical and taxonomic relationships are discussed in detail and attempts made to relate the distributional patterns to certain ecological factors. 66% of the species are truly Irano-Turanian, 23% are endemics, mostly derivatives of Irano-Turanian species, 10% are Saharo-Arabian and 7% are biregionals. Further aspects pointed out are the representations of life forms of families and genera. The results in the deserts studied give support to the concept of a coherent Irano-Turanian floristic region. The southern deserts form a sub-unit of their own, characterised by high numbers of endemics, some intruding Saharo-Arabian species and an absence of several otherwise common Irano-Turanian species.
Studies on halophytes from Iran and Afghanistan. II Ecology of halophytes along salt gradients
Authors: Breckle Siegmar-W. 
Published: January 2014

SynopsisThe halophytic communities of Iran and Afghanistan are rich in species compared with similar communities in S Europe or in N America. Ionic composition and the ion concentrations in the respective habitats characterise the main phytochemical types which develop. Such chemotypes or physiotypes of halophytes are partly correlated with conventional taxonomic units. The various types of halophytes from Iran and Afghanistan were compared and some eco-physiological characteristics are presented. The differences between “stem-halosucculents”, “leaf-halosucculents”, “recreting halophytes”, and types of ‘salt-avoiders” (“pseudohalophytes” and “non-halophytes” or “glycophytes”) are stressed. The ecological implications of the characteristics of these different halophytes, which lead to a typical halo-catena, are discussed.
Parasitic weeds and their impact in South-West Asia
Authors: Musselman Lytton J. 
Published: January 2014

SynopsisThree groups of SW Asiatic parasitic weeds are reviewed: the root parasites Striga (Scrophulariaceae), Cistanche and Orobanche (Orobanchaceae); and the stem parasites Cuscuta (Convolvulaceae). Striga hermonthka and S. asiatica are serious pests on sorghum, millet, and maize in parts of N and S Yemen and Saudi Arabia. Striga densiflora has apparently been introduced from India to Oman where it parasitises sugar-cane and sorghum. Species of Orobanche are widespread throughout almost all the region and cause serious losses in tomatoes, tobacco, broadbeans, melons and other crops. Cistanche phelypaea has recently been shown capable of attacking sugar beet. Species of Cuscuta (Convolvulaceae), widespread in SW Asia, mainly affect legume crops, especially lucerne. Considerable taxonomic research is still needed in Orobanche, Cistanche, and Cuscuta.
Molecular epidemiology of vancomycin-resistant enterococci isolated from non-tertiary-care and tertiary-care hospitals in Korea
Authors: JUNG M. K. , AHN S. H. , LEE W. G. , LEE E. H. 
Published: January 2014

SUMMARYThis study compared the molecular characteristics of vancomycin-resistantEnterococcus faecium(VREF) isolates recovered from 20 non-tertiary-care hospitals (36 isolates) and three tertiary-care hospitals (26 isolates) in diverse geographical areas of Korea from October 2010 to April 2011. All isolates carried thevanAgene only, but 42% and 73% of non-tertiary and tertiary-care isolates expressed the VanB phenotype (teicoplanin minimum inhibitory concentration ⩽16 μg/ml). All isolates harboured insertion sequences, IS1542and IS1216V, within Tn1546. The isolates from tertiary-care hospitals tended to have reduced Tn1546lengths by deletion of sequences adjacent to IS elements. Multilocus sequence typing revealed eight sequence types within clonal complex 17 (CC17), but DNA fingerprinting by rep-PCR did not show clonal relatedness between the intra- and inter-hospital isolates. These results suggest thatvanA, which has prevailed in tertiary-care hospitals of Korea since the 1990s, had been transferred horizontally to non-tertiary-care hospitals while the genetic rearrangement driven by evolutionary adaptation to adverse environments may have occurred in tertiary-care hospitals.
Grothendieck Rings of ℤ-Valued Fields
Authors: Cluckers Raf , Haskell Deirdre 
Published: January 2014

AbstractWe prove the triviality of the Grothendieck ring of a ℤ-valued field K under slight conditions on the logical language and on K. We construct a definable bijection from the plane K2 to itself minus a point. When we specialize to local fields with finite residue field, we construct a definable bijection from the valuation ring to itself minus a point.
In Memoriam: Raphael Mitchel Robinson
Authors: Henkin Leon 
Published: January 2014

About a month after his 83rd birthday Raphael Robinson was almost wholly incapacitated by a massive stroke, and 8 weeks later, on January 27, 1995, he died of ensuing complications. Mathematics was his life. He was always working on problems—those brought to him in journals or by colleagues, and others that he invented. Just three days before his death he received word that a paper of his, originating in a published problem, was accepted for publication. His 64 publications spanned a full 6 decades, and included significant papers on number theory, combinatorics, complex analysis, and geometry, in addition to logic and set theory.Robinson was born on November 2, 1911, in National City, California. He came to Berkeley to study mathematics, obtaining an A.B. in 1932, an M.A. in 1933, and his Ph.D. in December, 1934. His dissertation was in complex analysis. He took 12 graduate courses in a variety of fields, but not one was close to logic or set theory—which was later the setting of about a quarter of his publications.After completing his studies Robinson served as Instructor for two years at Brown University, then returned for good to Berkeley in 1937, reaching the rank of full Professor in 1949. He taught a great variety of courses and was known as an excellent teacher, but was most interested in problemsolving and research and in 1972, at age 61, he elected early retirement, at considerable financial sacrifice, in order to concentrate on these pursuits.
The Bulletin of Symbolic Logic
Authors: Shore Richard A. 
Published: January 2014

At the 1993 Annual meeting of the Association for Symbolic Logic, the Council of the association voted to establish a new journal to be called The Bulletin of Symbolic Logic. The intended goal of the Council was to produce a journal that would be both accessible and of interest to as wide an audience as possible, with the stated purpose of keeping the logic community abreast of important developments in all parts of our discipline. The first issue was to appear in March of 1995 and you now have it in your hands.In accordance with the Council resolution, we intend to publish primarily two types of papers. The first section of The Bulletin, Articles, will usually be devoted to works of an expository or survey nature. These papers will generally present topics of broad interest in a way that should be accessible to a large majority of the members of the Association. Topics will be drawn from all areas of logic including mathematical or philosophical logic, logic in computer science or linguistics, the history or philosophy of logic, logic education and applications of logic to other fields. One view of a role that this section of The Bulletin will play is as an ongoing handbook of logic.
Issues in the Conceptualization and Assessment of Hot Executive Functions in Childhood
Authors: Welsh Marilyn , Peterson Eric 
Published: January 2014

AbstractOur review examines the current state of the research on hot executive function (EF), as contrasted with cool EF, with regard to the evidence for construct validity. Current theoretical discussions have examined the conceptual overlap among constructs such as hot EF, effortful control, self-control, and self-regulation. We explore this emerging literature with a focus on research questions, tasks, and methods. Finally, we consider the unresolved questions facing the study of hot EF, most notably the difficulty in determining the relative “heat” of a given task based on task content, testing context, and the individual differences among the participants. (JINS, 2014,20, 1–5)