bluuebunny/crossref_metadata_2025_split huggingface dataset:
Predictors of adverse clinical outcomes after successful infrapopliteal intervention
Authors: Kawarada Osami , Fujihara Masahiko , Higashimori Akihiro , Yokoi Yoshiaki , Honda Yasuhiro , Fitzgerald Peter J. 
Published: March 2012

AbstractObjectivesTo clarify the clinical and angiographical variables related to delayed wound healing, major amputation and death after successful infrapopliteal intervention in critical limb ischemia patients with tissue loss.BackgroundThere is an underappreciation of adverse clinical outcomes after successful infrapopliteal intervention.MethodsStent‐assisted infrapopliteal angioplasty was successful in 106 limbs in 85 patients. Successful intervention was defined as revascularization of at least one straight‐line flow to the foot.ResultsAt 6 months and 1, 2, and 5 years, the repeat intervention‐free rates were 55.0, 49.6, 44.4, and 36.1%, respectively; the amputation‐free survival rates were 85.7, 68.0, 54.5, and 39.8%, respectively; and the limb salvage rates were 96.0, 92.4, 86.3, and 86.3%, respectively. An infectious wound was an independent predictor of major amputation after successful intervention. The complete wound healing rates were 36.8, 57.5, 67.9, and 73.6% at 3, 6, 9, and 12 months, respectively. In stepwise multivariate Cox analysis, diabetes mellitus, an infectious wound, and the pedal arch classification were identified as independent predictors of wound healing. The long‐term survival rates at 6 months and 1, 2, and 5 years were 89.5, 73.8, 62.0, and 43.4%, respectively. Stepwise multivariate Cox analysis indentified end‐stage renal disease (ESRD) on hemodialysis to be an independent predictor of death.ConclusionsAn infectious wound, comorbidities of diabetes mellitus and ESRD on hemodialysis and classification of pedal arch can be predictors of adverse clinical outcomes after successful infrapopliteal intervention. © 2012 Wiley Periodicals, Inc.
Stacking of Self‐Assembled Surface Micelles in Ultrathin Films
Authors: de Gracia Lux Caroline , Gallani Jean‐Louis , Waton Gilles , Krafft Marie Pierre 
Published: March 2012

AbstractNonpolar fluorophilic/lipophilic tetrablock amphiphiles are investigated on the surface of water and on solid substrates using compression isotherms, Brewster angle microscopy, and atomic force microscopy. At low pressures, the tetrablocks form monolayers of closely packed surface hemimicelles. Further compression causes a 2D/3D transition. At the end of the plateau, half of the deposited material is expelled forming a second monolayer on top of the initially formed monolayer. Both layers of the films consist of surface micelles, thus providing the first example of spontaneous or compression‐driven stacking of self‐assembled nano‐objects.
Benzene Oxidation at Diamond Electrodes: Comparison of Microcrystalline and Nanocrystalline Diamonds
Authors: Pleskov Yu. V. , Krotova M. D. , Elkin V. V. , Varnin V. P. , Teremetskaya I. G. , Saveliev A. V. , Ralchenko V. G. 
Published: March 2012

AbstractA comparative study of benzene oxidation at boron‐doped diamond (BDD) and nitrogenated nanocrystalline diamond (NCD) anodes in 0.5 M K2SO4 aqueous solution is conducted by using cyclic voltammetry and electrochemical impedance spectroscopy. It is shown by measurements of differential capacitance and anodic current that during the benzene oxidation at the BDD electrode, adsorption of a reaction intermediate occurs, which partially blocks the electrode surface and lowers the anodic current. At the NCD electrode, benzene is oxidized concurrently with oxygen evolution, a (quinoid) intermediate being adsorbed at the electrode. The adsorption and the electrode surface blocking are reflected in the impedance–frequency and impedance–potential complex‐plane plots.
Photocatalytic Generation of Syngas Using Combustion‐Synthesized Silver Bismuth Tungstate
Authors: de Tacconi Norma R. , Timmaji Hari Krishna , Chanmanee Wilaiwan , Huda Muhammad N. , Sarker Pranab , Janáky Csaba , Rajeshwar Krishnan 
Published: March 2012

AbstractSilver bismuth tungstate (AgBiW2O8) nanoparticles were prepared for the first time by solution combustion synthesis by using the corresponding metal nitrates as the precursor and urea as the fuel. These nanoparticles were subsequently modified with Pt catalyst islands using a photocatalytic procedure and used for the photogeneration of syngas (CO+H2). Formic acid was used for this purpose for the in situ generation of CO2 and its subsequent reduction to CO. In the absence of Pt modification, H2 was not obtained in the gas products evolved. These results were compared with those obtained with acetic acid in place of formic acid. The combustion process was simulated by thermogravimetry and the synthesized powder was characterized using transmission electron microscopy, diffuse reflectance UV/Vis spectroscopy, X‐ray diffraction, surface area measurements, and X‐ray photoelectron spectroscopy. Tauc plots derived from the diffuse reflectance data yielded an optical band gap of 2.74 eV. The photocatalytic activity of these nanoparticles was superior to a sample prepared by solid‐state synthesis. Mechanistic aspects are finally presented, as are structural models and electronic calculations, using density functional theory (DFT).
Solvent freeze out crystallization of lysozyme from a lysozyme‐ovalbumin mixture
Authors: Díaz Borbón V. , Ulrich J. 
Published: March 2012

AbstractHen egg white lysozyme (HEWL) crystallization conditions from an ovalbumin‐lysozyme mixture were found by screening tests and further located in pseudo‐phase diagrams. This information was used to set up the initial conditions for the solvent freeze out (SFO) process. The process uses the freezing of ice to create the supersaturation for the proteins to crystallize out of the solution. The crystallization of HEWL (15 mg/mL) out of a lysozyme‐ovalbumin mixture (1.7 mg/mL) is carried out by SFO. Under the reported conditions, a crystallization yield of 69 % was obtained. A mean crystal size of 77.8 µm was enhanced in a crystallization time of 15.1 h. The lysozyme nature of the crystals is proven by SDS PAGE and enzymatic activity tests. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Energy efficiency comparison between distributed and co‐located MIMO systems
Authors: He Chunlong , Sheng Bin , Zhu Pengcheng , Wang Dongming , You Xiaohu 
Published: March 2012

SUMMARYEnergy efficiency (EE) is becoming more and more important in future wireless communications because of limited battery power in mobile terminals. In this paper, we compare EE of the distributed MIMO (D‐MIMO) and co‐located MIMO (C‐MIMO) in uplink systems. Taking into account both circuit and transmit power, we derive an analytical expression for EE of D‐MIMO and C‐MIMO systems in a composite Rayleigh‐lognormal channel. What is more, an optimization algorithm is proposed to get the optimal EE values while satisfying given spectral efficiency requirement for both D‐MIMO and C‐MIMO systems. Simulation results show that D‐MIMO systems are more energy effective than C‐MIMO systems when considering the realistic systems, and the optimal EE can be obtained by the proposed algorithm while satisfying given spectral efficiency requirement. Copyright © 2012 John Wiley & Sons, Ltd.
Alterations in mast cell frequency and relationship to angiogenesis in the rat mammary gland during windows of physiologic tissue remodeling
Authors: Ramirez Robert A. , Lee Amy , Schedin Pepper , Russell Joshua S. , Masso‐Welch Patricia A. 
Published: March 2012

AbstractBackground: The mammary epithelium undergoes proliferation and regression accompanied by remodeling of the fibrocellular and vascular stroma. Mast cells are abundant in these compartments and have been implicated in remodeling during wound healing and cancer progression. The purpose of this study was to test the hypothesis that mast cell abundance correlates with physiologic mammary tissue remodeling during estrous cycling, lactogenesis (pregnancy and lactation) and involution. Results: Mast cell and capillary frequency were quantified in the stroma surrounding ducts and lobules from mammary glands of rats. During estrous cycling, periductal mast cell numbers were unchanged, but lobule‐associated mast cells significantly increased in the regressive phase of diestrus II. During lactogenesis, lobular stroma mast cells peaked early in pregnancy, at D2, followed by a significant decrease throughout lactation. Involution was associated with a rapid return in mast cell numbers, similar to diestrus II. Lobular vascularization peaked during the state of metestrus, when limited secretory differentiation occurs. Lobular angiogenesis peaked at D7 of pregnancy, regressed, and then returned to high levels during lactation and early involution, when secretory differentiation is high. Conclusions: These results suggest mast cells are predominantly associated with regressive lobular remodeling during cycling and involution, whereas angiogenesis is predominantly associated with secretory differentiation. Developmental Dynamics 241:890–900, 2012. © 2012 Wiley Periodicals, Inc.
Volcaniclastic aeolian deposits at Sunset Crater, Arizona: terrestrial analogs for Martian dune forms
Authors: Hooper Donald M. , McGinnis Ronald N. , Necsoiu Marius 
Published: March 2012

ABSTRACTSunset Crater in north‐central Arizona (USA) is a 900‐year‐old scoria‐cone volcano. Wind action has redistributed its widespread tephra deposit into a variety of aeolian dune forms that serve as a terrestrial analog for similar landforms and aeolian processes on Mars. Fieldwork was conducted to collect essential geomorphological and sedimentological data, and to establish a baseline for the type and morphometry of dunes, physical properties, interactions with topography, and saltation pathways. Our analyses focused primarily on coppice dunes, falling dunes, wind ripples, and sand streaks. For all collected volcaniclastic aeolian sediment samples, the sand‐size fraction dominated, ranging from almost 100% sand to 74.6% sand. No sample contained more than 1.6% silt. The composition is overwhelmingly basaltic with non‐basaltic particles composing 2 to 6% of the total. Coppice (nebkha) dunes form where clumps of vegetation trap saltating particles and create small mounds or hummocks. Mean grain size for coppice dune samples is coarse sand. Measured dune height for 15 coppice dunes ranged from 0.3 to 3.3 m with a mean of 1 m. Mean length was 6.7 m and mean width was 4.8 m. Falling dunes identified in this study are poorly developed and thin, lacking a prominent ramp‐like structure. Mean wavelength for three sets of measured ripples ranged from 22 to 36 cm. Sand streaks extend downwind for more than a kilometer and are up to 200 m in width. They commonly occur on the lee side of mesas and similar landforms and are typically the downwind continuation of falling dunes. Falling dunes, wind ripples, and sand streaks have been identified on Mars, while coppice dunes are similar to Martian shadow or lee dunes in which sand accumulates in the lee of obstacles. Copyright © 2012 John Wiley & Sons, Ltd.
The role of snow melting upon landslides in the central Argentinean Andes
Authors: Moreiras Stella , Lisboa Maria Sol , Mastrantonio Leandro 
Published: March 2012

ABSTRACTThis paper focuses on the historical range of variability of landslide activity and its relation to climate in the Aconcagua Park, Argentina. Landslide frequency data are obtained through historic compilation, including the review of more than 85 data sources and personal interviews with members of the local community. Based on these records, the study analyzes major landslide triggering mechanisms and evaluates the role of climate. Slope instability in Aconcagua Park appears to be mainly forced by the melting of snow accumulated during the winter season, which in turn promotes soil saturation and landslide occurrence the following spring–summer (December–February). This finding is supported by a strong correlation between landslides and stream flows of Andean rivers. These peaks occur during warmer seasons, fed by snow and ice‐glacier melting. In contrast, the correlation between landslide frequency and precipitation (diary/accumulative/monthly/annual) is less certain; and the relationship of landslide to temperature records (mean annual temperature/mean temperature during November–February period) is weak. Copyright © 2012 John Wiley & Sons, Ltd.
Pennsylvania takes lead in taxing and regulating fracking
Authors: Sabino Michael A. 
Published: March 2012

AbstractThe Marcellus Shale formation and accessing its vast potential via the controversial process of “fracking” continues to preoccupy the industry—and many others. Recently we addressed the narrow issue of how development of the Marcellus Shale interacts with established property law in Pennsylvania.1 Today we return to the Keystone State to provide what we hope will be a useful analysis of its newest statutory promulgation concerning the future of this new natural gas resource.
Gas producers: Shale‐gas cases important in state‐level upstream litigation
Authors: Kurth Thomas E. 
Published: March 2012

AbstractLitigation claims between private parties arising in the context of exploration and production activities encompass a wide range of contract and tort issues. In Texas and other states, the fee simple ownership of land comprises both a surface and mineral estate. As a result, opportunities for disputes and litigation abound both between the two estates and within the “bundle of sticks” comprising the numerous interests in the mineral estate.1
Alternative energy sources: Solar project due diligence
Authors: Schnitzer Marie 
Published: March 2012

AbstractWhile any energy project has risks, more conventional risks include anything in the wide area including site control, permitting, securing finance, equipment supply, operations and maintenance agreements, and confidence in energy production estimates. With renewable projects, the intermittent fuel or resource adds additional risk. Due to the nature and diversity of these challenges, independent assessments are encouraged throughout the project development life cycle.
Natural gas prices: Shale gas makes wall street go medieval on prices
Authors: Willett Robert E. 
Published: March 2012

AbstractIn Alan Greenspan's autobiography,1 he outlines his theory that the low inflation we saw through much of the time that he was chairman of the Federal Reserve was caused by a change in policy of the government of the People's Republic of China—it let the country folk come to town. There, at extremely low wages and in such abundance of people, they were able to produce enormous quantities of goods and make many US and European (and Latin American) industries obsolete, at least for the time being.
Technology: Limits to demand‐response programs can be stretched
Authors: Skinner R. Kenneth 
Published: March 2012

AbstractIt is no secret that the Obama administration has promoted energy policies that favor clean renewable energy and conservation in place of traditional fossil‐fueled generation. National and state policies combined with advances in communications, metering, security, storage, wind and photovoltaic generation, electric vehicles, efficient and smart appliances, lighting, and many others are already impacting the energy industry and are poised to completely change the energy landscape.
Examining carer stress in dementia: the role of subtype diagnosis and neuropsychiatric symptoms
Authors: Lee David R , McKeith Ian , Mosimann Urs , Ghosh‐Nodyal Arunima , Thomas Alan J 
Published: March 2012

IntroductionCaring for people with dementia incurs significant stress for carers. Stress has been related to the duration of caring role, the number of weekly hours provided and severity of cognitive impairment. What remains less clear is the impact of neuropsychiatric symptoms and subtype of dementia on carer stress and this study aimed to examine these.MethodsDementia carers were recruited for people with a range of dementia subtypes. Carers were interviewed using the Neuropsychiatric Inventory with the Carer Distress Scale. Cognitive fluctuations were assessed using the Dementia Cognitive Fluctuations Scale. All patients were also examined with The Cambridge Assessment for mental disorders in the elderly.ResultsDementia diagnostic subtype, the presence of cognitive fluctuations and some neuropsychiatric symptoms (psychosis and mood disturbance) did predict carer stress (all at p < 0.01) but age, gender and severity of cognitive impairment did not (all p > 0.33). Carers of people with dementia with Lewy bodies (DLB) and Parkinson's disease dementia (PDD) experienced more stress than those caring for patients with Alzheimer's disease and vascular dementia. Carer stress was associated with higher levels of psychosis, mood disturbances, daytime sleep and cognitive fluctuations in the person with dementia.ConclusionsThis study identified the significant impact on carers of providing care for people with DLB and PDD dementia subtypes and also highlighted the significant impact of providing care for patients with high levels of psychosis, mood disturbances and cognitive fluctuations. Copyright © 2012 John Wiley & Sons, Ltd.
Judging roughness by sight—A 7‐tesla fMRI study on responsivity of the primary somatosensory cortex during observed touch of self and others
Authors: Kuehn Esther , Trampel Robert , Mueller Karsten , Turner Robert , Schütz‐Bosbach Simone 
Published: March 2012

AbstractObserving another person being touched activates our own somatosensory system. Whether the primary somatosensory cortex (S1) is also activated during the observation of passive touch, and which subregions of S1 are responsible for self‐ and other‐related observed touch is currently unclear. In our study, we first aimed to clarify whether observing passive touch without any action component can robustly increase activity in S1. Secondly, we investigated whether S1 activity only increases when touch of others is observed, or also when touch of one's own body is observed. We were particularly interested in which subregions of S1 are responsible for either process. We used functional magnetic resonance imaging at 7 Tesla to measure S1 activity changes when participants observed videos of their own or another's hand in either egocentric or allocentric perspective being touched by different pieces of sandpaper. Participants were required to judge the roughness of the different sandpaper surfaces. Our results clearly show that S1 activity does increase in response to observing passive touch, and that activity changes are localized in posterior but not in anterior parts of S1. Importantly, activity increases in S1 were particularly related to observing another person being touched. Self‐related observed touch, in contrast, caused no significant activity changes within S1. We therefore assume that posterior but not anterior S1 is part of a system for sharing tactile experiences with others. Hum Brain Mapp, 2013. © 2012 Wiley Periodicals, Inc.
Episodic autobiographical memory in amnestic mild cognitive impairment: What are the neural correlates?
Authors: Bastin Christine , Feyers Dorothée , Jedidi Haroun , Bahri Mohamed Ali , Degueldre Christian , Lemaire Christian , Collette Fabienne , Salmon Eric 
Published: March 2012

AbstractAutobiographical memory in amnestic Mild Cognitive Impairment (aMCI) is characterized by impaired retrieval of episodic memories, but relatively preserved personal semantic knowledge. This study aimed to identify (via FDG‐PET) the neural substrates of impaired episodic specificity of autobiographical memories in 35 aMCI patients compared with 24 healthy elderly controls. Significant correlations between regional cerebral activity and the proportion of episodic details in autobiographical memories from two life periods were found in specific regions of an autobiographical brain network. In aMCI patients, more than in controls, specifically episodic memories from early adulthood were associated with metabolic activity in the cuneus and in parietal regions. We hypothesized that variable retrieval of episodic autobiographical memories in our aMCI patients would be related to their variable capacity to reactivate specific sensory‐perceptual and contextual details of early adulthood events linked to reduced (occipito‐parietal) visual imagery and less efficient (parietal) attentional processes. For recent memories (last year), a correlation emerged between the proportion of episodic details and activity in lateral temporal regions and the temporo‐parietal junction. Accordingly, variable episodic memory for recent events may be related to the efficiency of controlled search through general events likely to provide cues for the retrieval of episodic details and to the ability to establish a self perspective favouring recollection. Hum Brain Mapp, 2013. © 2012 Wiley Periodicals, Inc.
Quadriplegia secondary to cervical spondylotic myelopathy—A rare complication of head and neck surgery
Authors: Chen Wei‐Fan , Kang Chung‐Jan , Lee Sai‐Cheung , Tsao Chung‐Kan 
Published: March 2012

AbstractBackgroundFree tissue reconstruction after ablation of head and neck malignancy often requires extensive cervical manipulation, which may exacerbate preexisting cervical spondylosis and result in progression to cervical myelopathy. We present a rare case of postoperative quadriplegia caused by cervical spondylotic myelopathy after head and neck reconstruction.Methods and ResultsA 63‐year‐old man without a history of cervical spondylosis underwent resection of a gingivo‐buccal squamous cell carcinoma with immediate reconstruction with free fibula osteocutaneous flap. On postoperative day 4, the patient was found to have quadriplegia. MRI demonstrated severe cervical myelopathy. Decompressive laminectomy was performed. The patient underwent an extensive rehabilitation program but only realized moderate improvement.ConclusionCervical spondylotic myelopathy is a rare but disastrous complication of head and neck surgery. We hypothesize that it is potentially avoidable with heightened awareness of this disease entity, preoperative identification of patients at risk, and prophylactic interventions © 2012 Wiley Periodicals, Inc. Head Neck, 2013
Relevance of the primary lesion in the prognosis of metastatic cutaneous squamous cell carcinoma
Authors: Ch'ng Sydney , Clark Jonathan R. , Brunner Markus , Palme Carsten E. , Morgan Gary J. , Veness Michael J. 
Published: March 2012

AbstractBackgroundIt remains unclear how primary tumor factors impact on prognosis in patients with nodal metastasis in head and neck cutaneous squamous cell carcinoma (SCC). The purpose of this study was to assess whether primary tumor characteristics are independent prognostic factors.MethodsPatients treated for metastatic cutaneous SCC from 1978 to 2010 were identified (n = 239). A proportional hazards model was used to assess the effect of primary tumor variables.ResultsOn multivariable analysis, tumor differentiation (hazard ratio [HR], 0.2; 95% confidence interval [CI], 0.1–0.8; p = .03) was found to be significantly associated with disease‐specific survival (DSS), unlike margin status (p = .23), tumor size (p = .21), and thickness (p = .11). Patient, treatment, and nodal factors were confirmed to be important predictors of survival.ConclusionThis article suggests that pathological features of the primary lesion bear little importance in the presence of established nodal metastasis, other than tumor differentiation. It validates the grouping of T1–3N1 as stage III under the current American Joint Committee on Cancer (AJCC) TNM staging system. © 2012 Wiley Periodicals, Inc. Head Neck, 2013