bluuebunny/crossref_metadata_2025_split huggingface dataset:
Elaboration of small‐diameter vascular prostheses—Selection of appropriate sterilisation method
Authors: Chrzanowska Olga , Struszczyk Marcin Henryk , Krucinska Izabella , Puchalski Michał , Herczyńska Lucyna , Chrzanowski Michał 
Published: April 2014

ABSTRACTThe aim of study is the elaboration of semi‐biodegradable, multilayered tubular structures as substitutes for the reconstruction of small diameter vascular prostheses (<6 mm). The inert external layer of the prostheses will be fabricated via the melt electrospinning of poly (l‐lactide‐co‐glycolide) (PLGA). The middle layer will be constructed from polypropylene (PP); the first prototype will be produced via melt electrospinning and the second using the melt blowing technique. The general aim of this stage of the research is the selection of a sterilisation technique that is appropriate for semi‐biodegradable, multilayered tubular structures. For this purpose, single tubular structures created via the melt electrospinning of PLGA or PP and melt blown tubular structures of PP were elaborated. The influence of steam, ethylene‐oxide (EO), and radiation sterilisation techniques on the elaborated microstructure of tubular structures was analyzed during this study. The effect of each sterilisation technique was evaluated using differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy/energy‐dispersive X‐ray spectroscopy analysis (SEM/EDS). The changes in average molecular weight (Mw) and crystallinity index (CI) of the PLGA tubular structures after EO and steam sterilisation were evaluated. The EO and steam sterilisation resulted in the complete destruction of PLGA tubular structures. Only the radiation sterilisation (accelerated electrons) did not influence on PLGA tubular structures morphology as well as thermal and chemical properties. FTIR and SEM/EDS analysis indicated that no changes in the chemical properties of PP tubular structures after each sterilisation occurred. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40812.
Prenatal Anti‐Ro Antibody Exposure, Congenital Complete Atrioventricular Heart Block, and High‐Dose Steroid Therapy: Impact on Neurocognitive Outcome in School‐Age Children
Authors: Kelly E. N. , Sananes R. , Chiu‐Man C. , Silverman E. D. , Jaeggi E. 
Published: April 2014

ObjectiveTo determine the impact of prenatal exposure to maternal anti‐Ro antibodies, slow fetal heart rate, and/or prolonged dexamethasone therapy for immune‐mediated congenital atrioventricular heart block (CAVB) on the cognitive and academic performance of these children at school age.MethodsWe performed a prospective, blinded assessment of the cognitive functioning of 3 cohorts of children ages 6–16 years with in utero exposure to maternal anti‐Ro antibodies in the following groups: no CAVB and no prenatal dexamethasone treatment (n = 14), CAVB without prenatal treatment (n = 10), and CAVB with prenatal dexamethasone treatment (n = 16). Domains assessed included intelligence, visual perceptual and visual motor skills, auditory and visual attention, verbal learning and memory, visual memory, executive function, and behavior.ResultsAll cohorts scored within the normal range and were not significantly different in terms of intelligence scores, verbal comprehension, perceptional reasoning, working memory, and processing speed. For children with CAVB who were treated prenatally, there were no significant associations between the neurocognitive function scores, the minimal fetal heart rate (range 47–80 beats per minute), and either the duration (range 2–15 weeks) or dosage (range 56–824 mg) of dexamethasone therapy.ConclusionCAVB and transplacental treatment with dexamethasone was not associated with neurocognitive impairment in school‐age children. Larger numbers of children are needed to validate our observation, and assessment of other cognitive abilities is warranted.
Fabrication of Macroporous Films with Closed Honeycomb‐Like Pores from Exponentially Growing Layer‐by‐Layer Assembled Polyelectrolyte Multilayers
Authors: Chen Xiaoling , Sun Junqi 
Published: April 2014

AbstractWe report an innovative method for the fabrication of macroporous films with closed honeycomb‐like pores of several micrometers by post‐treatment of micrometer‐thick poly(acrylic acid) (PAA)/poly(allylamine hydrochloride) (PAH) films. The precursor PAA/PAH films are fabricated by exponential layer‐by‐layer assembly of PAA and PAH, which produces PAA/PAH films with highly interpenetrated structures. We disclose that the high mobility of PAA and PAH, which originates from the highly interpenetrated film structures, allows a large‐scale phase separation to take place upon post‐treatment to produce micrometer‐sized honeycomb pores. These macroporous PAA/PAH films can be conveniently released from substrates to produce free‐standing films with satisfactory mechanical stability.
Diketopyrrolopyrrole J‐Aggregates Formed by Self‐Organization with DNA
Authors: Tsuto Koji , Nakamura Mitsunobu , Takada Tadao , Yamana Kazushige 
Published: April 2014

AbstractBis(2‐thienyl)diketopyrrolopyrrole with two ZnII‐cyclens (ZnCyc‐DPP) was designed and synthesized to evaluate the selective binding of ZnII‐cyclen with thymine base in single‐strand DNA as a tool for the construction of a highly ordered multichromophore system on DNAs. Through UV/Vis titrations, gel filtration chromatography, and circular dichroism spectroscopy, ZnCyc‐DPP formed J‐type DPP aggregates with oligo‐dTn DNAs. The DPP aggregates absorbed on a gold electrode exhibited good photocurrent responses. The present results show that binding ZnII‐cyclen–chromophore conjugates and thymine bases together is a powerful tool for preparing DNA‐templated multichromophoric systems with specific functions.
Survey of the literature on mechanoluminescence from 1605 to 2013
Authors: Jha P. , Chandra B. P. 
Published: April 2014

ABSTRACTMechanoluminescence (ML) is a type of luminescence induced by any mechanical action on solids. The light emissions induced by elastic deformation, plastic deformation and fracture of solids are called elastico ML (EML), plastico ML (PML) and fracto ML (FML), respectively. Whereas nearly 50% of all organic molecular solids and inorganic salts exhibit FML, only a few solids exhibit EML and PML. The EML and FML of certain solids are so intense that they can be seen during daylight with the naked eye. Mechanolumnescence has a great potential for use in different types of mechano‐optical devices such as stress sensors, damage sensors, impact sensors, fracture sensors and safety management monitoring systems. This article reports a survey of the literature from 1605 to 2013. Mechanoluminescence is studied by physicists, chemists, material scientists, geologists, medical scientists, engineers and technologists, among others and researchers will certainly benefit from the literature survey on ML given here. In addition, the field of mechanoluminescence may attract the interest of many new researchers. Copyright © 2014 John Wiley & Sons, Ltd.
Binding characteristics and interactive region of 2‐phenylpyrazolo[1,5‐c]quinazoline with DNA
Authors: Song Yonghai , Zhong Dandan , Luo Jinhui , Tan Hongliang , Chen Shouhui , Li Ping , Wang Li , Wang Tao 
Published: April 2014

ABSTRACTThe interaction between 2‐phenylpyrazolo[1,5‐c]quinazoline (PQ) and DNA under physiological conditions was investigated using multi‐spectroscopic techniques, atomic force microscopy and gel electrophoresis. The thermodynamic parameters were estimated and were discussed in detail. The results of fluorescence‐quenching experiments indicated that the main interactive force between PQ and DNA was a hydrophobic interaction and that it was a static quenching process. Potassium iodide and single‐strand (ss)DNA quenching studies, together with circular dichroism spectra implied groove binding of PQ with DNA. Atomic force microscopy and gel electrophoresis experiments suggested that there were no major conformational changes in DNA upon interaction with PQ. In addition, UV/vis absorption titration of DNA bases confirmed that PQ bound with DNA mainly through a minor groove interaction and preferentially interacted with adenine and thymine. We anticipate that this work will provide useful information for the application of quinazoline derivatives in the fields of medicinal and pharmaceutical chemistry. Copyright © 2014 John Wiley & Sons, Ltd.
Outcomes of routine ilioinguinal lymph node dissection for palpable inguinal melanoma nodal metastasis
Authors: Glover A R , Allan C P , Wilkinson M J , Strauss D C , Thomas J M , Hayes A J 
Published: April 2014

Abstract

Background
Patients who present with palpable inguinal melanoma nodal metastasis have two surgical options: inguinal or ilioinguinal lymph node dissection. Indications for either operation remain controversial. This study examined survival and recurrence outcomes following ilioinguinal dissection for patients with palpable inguinal nodal metastasis, and assessed the incidence and preoperative predictors of pelvic nodal metastasis.

Methods
This was a retrospective clinicopathological analysis of consecutive surgical patients with stage III malignant melanoma. All patients underwent a standardized ilioinguinal dissection at a specialist tertiary oncology hospital over a 12-year period (1998–2010).

Results
Some 38·9 per cent of 113 patients had metastatic pelvic nodes. Over a median follow-up of 31 months, the 5-year overall survival rate was 28 per cent for patients with metastatic inguinal and pelvic nodes, and 51 per cent for those with inguinal nodal metastasis only (P = 0·002). The nodal basin control rate was 88·5 per cent. Despite no evidence of pelvic node involvement on preoperative computed tomography (CT), six patients (5·3 per cent) with a single metastatic inguinal lymph node had metastatic pelvic lymph nodes. Logistic regression analysis showed that the number of metastatic inguinal nodes (odds ratio 1·56; P = 0·021) and suspicious CT findings (odds ratio 9·89; P = 0·001) were both significantly associated with metastatic pelvic nodes. The specificity of CT was good (89·2 per cent) in detecting metastatic pelvic nodes, but the sensitivity was limited (57·9 per cent).

Conclusion
Metastatic pelvic nodes are common when palpable metastatic inguinal nodes are present. Long-term survival can be achieved following their resection by ilioinguinal dissection. As metastatic pelvic nodes cannot be diagnosed reliably by preoperative CT, patients presenting with palpable inguinal nodal metastasis should be considered for ilioinguinal dissection.
Bright Coppertunities: Multinuclear CuI Complexes with N–P Ligands and Their Applications
Authors: Wallesch Manuela , Volz Daniel , Zink Daniel M. , Schepers Ute , Nieger Martin , Baumann Thomas , Bräse Stefan 
Published: April 2014

AbstractEasy come, easy go: the great structural diversity of CuI complexes is an ambivalent trait. Apart from the well‐known catalytic properties of CuI, a great number of potent luminescent complexes have been found in the last ten years featuring a plethora of structural motifs. The downside of this variety is the undesired formation of other species upon processing. In here, strategies to avoid this behavior are presented: Only one favorable structural unit often exists for multinuclear CuI complexes with bridging ligands. In addition, these complexes exhibit favorable photophysical properties due to cooperative effects of the metal halide core. Furthermore, we demonstrate the broad range of applications of emitting CuI compounds.
SalenZn‐bridged D‐π‐A Dyes For Dye‐Sensitized Solar Cells
Authors: Jia Yongjian , Gou Faliang , Fang Ran , Jing Huanwang , Zhu Zhenping 
Published: April 2014

AbstractA series of SalenZn based dyes with triphenylamine derivatives as the donor, benzoic acid as the acceptor, and coplanar Salen complexes as the spacer have been designed and synthesized for dye‐sensitized solar cells. The absorption, electrochemical, and photovoltaic properties for all sensitizers have been systematically investigated. When the tail length of the alkyl substituents is increased from C‐0 to C‐8 on the donor part, the efficiency of its DSSC augments evidently. It is found that the incorporation of bis‐carboxyl groups instead of the single carboxyl group as anchoring groups induces a remarkable enhancement of the electron injection efficiency from the excited dyes to the TiO2 semiconductor and generates higher electron density and voltage.
[2]Pseudorotaxanes Based on Naphtho‐21‐crown‐7 and Secondary Dialkylammonium Salts: Remarkably Improved Association Constants Among Four Threaded Structures
Authors: Zhou Qizhong , Luo Yan , Jiang Huajiang , Ye Yuyuan , Zhang Quan , Dai Guoliang , Chen Rener 
Published: April 2014

AbstractThis research article is focused on the recognition interaction of a new host naphtho‐21‐crown‐7 and four secondary dialkylammonium salts. In acetone, they can form 1:1 host‐guest complexes which belong to slow‐exchange systems. We also found the differences of binding affinity and binding selectivity between the host and its complementary guest moieties, which could be ascribed to the aromatic π‐π stacking effect and the acidity increase of N‐methylene and ammonium hydrogens due to the increasing electron withdrawing ability from butyl to methoxyphenyl to phenyl to p‐cyanophenyl substituents in the recognition motif.
Enatioselective Chalcogeno‐Baylis‐Hillman Reaction of Arylaldehydes with MVK and Acrylates Catalyzed by Chiral Thiepin‐TiCl4 Complex
Authors: Yin Yan , Sun Guofeng , Zhang Heng , Zhou Hong , Wu Fanhong 
Published: April 2014

AbstractIn a rational chiral molecular design of chalcogenides, optically active thiepin with C2‐symmetric chirality was synthesized from commercially available thiophene. Then enatioselective Chalcogeno‐Baylis‐Hillman reactions of arylaldehydes with methyl vinyl ketone (MVK) and acrylates were investigated in the presence of thiepin‐Lewis acid complex. Finally, up to 64% ee was achieved in the presence of 0.2 equiv. of (S)‐thiepin at 20°C.
Ethynylene‐Linked Oligomers Based on Benzodithiophene: Synthesis and Photoelectric Properties
Authors: Jiang Songyang , Ma Yuwen , Wang Yingyi , Wang Chengyun , Shen Yongjia 
Published: April 2014

AbstractTwo conjugated ethynyl‐linked oligomers, oligo(benzodithiophene‐ethynylene‐benzothiadiazole) (O1) and oligo(benzodithiophene‐ethynylene‐carbazole) (O2), were synthesized by Sonogashira coupling reaction. Their degrees of polymerization were 7 and 10, respectively. Their photophysical and electrochemical properties were investigated. O1 exhibitd two strong absorption bands at 404 nm and 483 nm, and O2 at 401 nm and 429 nm. The results of UV‐Vis, cyclic voltammetry (CV) and theoretical calculations showed that O1 has a narrower band gap than O2. The conductivities of O1 and O2 were 1.05×10−15 and 6.98×10−16 S/cm, respectively, and would increase to 1.23×10−10 and 1.05×10−10 S/cm after doping with iodine.
An [Fe‐Fe]‐Hydrogenase Mimic Immobilized on MCM‐41 for the Photochemical Production of Hydrogen in Pure Water
Authors: Wang Wen , Yu Tianjun , Zeng Yi , Chen Jinping , Li Yi 
Published: April 2014

AbstractA composite proton‐reducing catalyst Hy@MCM‐41 was created by using a hydrophobic [Fe‐Fe]‐hydrogenase mimic (Hy) incorporated into the K+‐exchanged molecular sieve MCM‐41. Hy acts as the active site to generate H2 by reducing H+, and MCM‐41 provide a large surface area to maintain the dispersion of Hy and to prevent aggregation and precipitation. Hy@MCM‐41 was successfully applied to the light‐induced hydrogen production in pure water with an iridium compound [Ir(ppy)2bpy]Cl and triethylamine (TEA) as the photosensitizer and the sacrificial electron donor, respectively, exhibiting good stability and catalytic activity. The present study provides a general strategy for the application of water‐insoluble catalysts in pure water by using mesoporous molecular sieves.
Synthesis of (±)‐Bakuchiol via a Pot‐Economy Approach
Authors: Huang Meng‐Yuan , Chen Long , Li Ruoxi , Jia Xueshun , Hong Ran 
Published: April 2014

AbstractA rapid synthetic route toward (±)‐Bakuchiol is presented in 29% overall yield. After the sole all‐carbon quaternary carbon center is created via allylboration of 2‐aryl acetaldehyde, a "Pot‐Economy" approach including mesylation, elimination, and desilylation was realized in the presence of tBuOK under ambient temperature to provide (±)‐Bakuchiol.
From medical images to flow computations without user‐generated meshes
Authors: Dillard Seth I. , Mousel John A. , Shrestha Liza , Raghavan Madhavan L. , Vigmostad Sarah C. 
Published: April 2014

SUMMARYBiomedical flow computations in patient‐specific geometries require integrating image acquisition and processing with fluid flow solvers. Typically, image‐based modeling processes involve several steps, such as image segmentation, surface mesh generation, volumetric flow mesh generation, and finally, computational simulation. These steps are performed separately, often using separate pieces of software, and each step requires considerable expertise and investment of time on the part of the user. In this paper, an alternative framework is presented in which the entire image‐based modeling process is performed on a Cartesian domain where the image is embedded within the domain as an implicit surface. Thus, the framework circumvents the need for generating surface meshes to fit complex geometries and subsequent creation of body‐fitted flow meshes. Cartesian mesh pruning, local mesh refinement, and massive parallelization provide computational efficiency; the image‐to‐computation techniques adopted are chosen to be suitable for distributed memory architectures. The complete framework is demonstrated with flow calculations computed in two 3D image reconstructions of geometrically dissimilar intracranial aneurysms. The flow calculations are performed on multiprocessor computer architectures and are compared against calculations performed with a standard multistep route. Copyright © 2014 John Wiley & Sons, Ltd.
Molybdenum Carbide as a Highly Selective Deoxygenation Catalyst for Converting Furfural to 2‐Methylfuran
Authors: Xiong Ke , Lee Wen‐Sheng , Bhan Aditya , Chen Jingguang G. 
Published: April 2014

AbstractSelectively cleaving the CO bond outside the furan ring of furfural is crucial for converting this important biomass‐derived molecule to value‐added fuels such as 2‐methylfuran. In this work, a combination of density functional theory (DFT) calculations, surface science studies, and reactor evaluation identified molybdenum carbide (Mo2C) as a highly selective deoxygenation catalyst for converting furfural to 2‐methylfuran. These results indicate the potential application of Mo2C as an efficient catalyst for the selective deoxygenation of biomass‐derived oxygenates including furanics and aromatics.
Barrett's esophagus in anorexia nervosa: A case report
Authors: Pacciardi Bruno , Cargioli Claudio , Mauri Mauro 
Published: April 2014

ABSTRACTBarrett's esophagus (BE) is a metaplastic lesion that may result from long‐lasting gastroesophageal reflux and it is an established precursor of esophageal adenocarcinoma.There are reports of an increased prevalence of BE, and eventually esophageal adenocarcinoma, in patients with eating disorders characterized by purging behaviors like those with bulimia nervosa (BN).Among patients with eating disorders, those affected by anorexia nervosa binging purging subtype (ANBP), are behaviorally very similar to those with BN, but to our knowledge there are no data in literature about BE in patients with ANBP.We present the case of a 37‐year‐old female with a 20‐year history of ANBP in comorbidity with bipolar disorder, who developed a BE requiring multi‐specialistic intervention. © 2014 Wiley Periodicals, Inc. (Int J Eat Disord 2015; 48:147–150)
Comparison of the effects of symmetric and asymmetric temperature elevation and CO2 enrichment on yield and evapotranspiration of winter wheat (Triticum aestivum L.)
Authors: Qiao Yunzhou , Liu Huiling , Kellomäki Seppo , Peltola Heli , Liu Yueyan , Dong Baodi , Shi Changhai , Zhang Huizhen , Zhang Chao , Gong Jinnan , Si Fuyan , Li Dongxiao , Zheng Xin , Liu Mengyu 
Published: April 2014

AbstractUnder the changing climate, asymmetric warming pattern would be more likely during day and night time, instead of symmetric one. Concurrently, the growth responses and water use of plants may be different compared with those estimated based on symmetric warming. In this work, it was compared with the effects of symmetric (ETs) and asymmetric (ETa) elevation of temperature alone, and in interaction with elevated carbon dioxide concentration (EC), on the grain yield (GY) and evapotranspiration in winter wheat (Triticum aestivum L.) based on pot experiment in the North China Plain (NCP). The experiment was carried out in six enclosed‐top chambers with following climate treatments: (1) ambient temperature and ambient CO2 (CON), (2) ambient temperature and elevated CO2 (EC), (3) elevated temperature and ambient CO2 (ETs; ETa), and (4) elevated temperature and elevated CO2 (ECETs, ECETa). In symmetric warming, temperature was increased by 3°C and in asymmetric one by 3.5°C during night and 2.5°C during daytime, respectively. As a result, GY was in ETa and ETs 15.6 (P < 0.05) and 10.3% (P < 0.05) lower than that in CON. In ECETs and ECETa treatments, GY was 14.9 (P < 0.05) and 9.1% (P < 0.05) higher than that in CON. Opposite to GY, evapotranspiration was 7.8 (P < 0.05) and 17.9% (P < 0.05) higher in ETa and ETs treatments and 7.2 (P < 0.05) and 2.1% (P > 0.05) lower in ECETs and ECETa treatments compared with CON. Thus, GY of wheat could be expected to increase under the changing climate with concurrent elevation of CO2 and temperature as a result of increased WUE under the elevated CO2. However, the gain would be lower under ETa than that estimated based on ETs due to higher evapotranspiration.
Theoretical Investigation of the Controlled Metathesis Reactions of Methylruthenium(II) Complexes with Terminal Acetylenes
Authors: Liu Yuxia , Chen Guang , Wang Hongliang , Bi Siwei , Zhang Dongju 
Published: April 2014

AbstractWith the help of density functional theory (DFT) calculations, we theoretically investigated and rationalized the controlled metathesis reactions of methylruthenium complex trans‐[Ru(CH3)2(dmpe)2] [dmpe = 1,2‐bis(dimethylphosphanyl)ethane] (A) with terminal acetylenes. On the basis of the mechanistic study, two important issues related to the generation of mono‐ and bis‐acetylido Ru complexes have been addressed. One issue is why the formation of bis‐acetylido complex C, trans‐[Ru(C≡CPh)2] (dmpe)2, is more difficult than the formation of mono‐acetylido complex B, trans‐[Ru(C≡CPh)(CH3)(dmpe)2]. A strong d→π*(C≡C) interaction between Ru and the alkynyl in B is believed to weaken π back‐donation of Ru to the phenylacetylene C–H σ* bond, and then makes the phenylacetylene C–H bond difficult to break. The second issue is what role methanol plays in promoting the ligand metathesis between the methyl group in B and one alkynyl moiety in 1,4‐diethynylbenzene to give bis‐acetylido species D, trans‐[(PhC≡C)Ru(dmpe)2(C≡CC6H4C≡CH)]. The relatively strong proton‐donating ability of methanol was found to be the major reason. The present study is indicative of the controllable synthesis of mono‐ and bis‐acetylido, and even di‐ and trinuclear acetylide‐bridged ruthenium(II) complexes.