bluuebunny/crossref_metadata_2025_split huggingface dataset:
Surface modification of lignin for applications in polypropylene blends
Authors: Atifi Siham , Miao Chuanwei , Hamad Wadood Y. 
Published: March 2017

ABSTRACTThe surface modification of wet‐milled softwood lignin produced with the LignoForce System was successfully carried out in a one‐step aqueous process. Different hydrophobic molecules, including cetyl trimethyl ammonium bromide, poly(ethylene oxide), polyethylene‐block‐poly(ethylene glycol), dodecenyl succinic anhydride, and alkyl ketene dimer (AKD), were investigated to design the hydrophobicity of lignin with the objective of improving the adhesion and compatibility in polymer blends composed of polar lignin particles and, for example, nonpolar polypropylene (PP). AKD, among all of the investigated approaches, proved to be the simplest and most effective for significantly increasing the contact angle of lignin while preserving the original micrometer size of wet‐milled, spray‐dried lignin particles. This treatment led to a noticeable improvement in the stiffness of lignin–PP composite blends, with an increase of approximately 15% in Young's modulus. The compatibility of the AKD‐treated lignin with PP was assessed through tensile strength measurements and blend morphology observation, whereas the mechanism of AKD interaction with lignin was investigated with contact angle measurement, differential scanning calorimetry, Fourier transform infrared spectroscopy, and 1H‐NMR spectroscopy measurements. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45103.
Two‐Dimensional Crystallization of Rylene Diimide Based n‐Type Semiconductors Tuned by the Dimensions of the Aromatic Core at the Liquid–Solid Interface
Authors: Guo Zongxia , Yu Ping , Sun Kai , Wang Wenpin , Wei Yuhan , Li Zhibo 
Published: March 2017

AbstractThe investigation of semiconductors at the surface provides opportunities to observe and understand the mechanism of molecular interaction for the design of semiconductors so that organic electronics with good performance can be built. Herein, the 2D crystallization of rylene diimide based n‐type semiconductors (i.e., 1–4) was explored at the liquid–highly oriented pyrolytic graphite interface by means of scanning tunneling microscopy. Rylene diimides 1–3 with increased aromatic dimensions show different surface crystallization behaviors and distinguished 2D patterns. The surface chirality was also found to be directly affected by the aromatic dimensions. The 2D patterns and the surface chirality could also be tuned by the nature of the solvent. In addition, molecular symmetry was found to be of great important for the formation of long‐range ordered 2D monolayers. This investigation highlights the importance of the rational design of molecular dimensions and geometrical symmetry in achieving determined 2D nanopatterns on surfaces, especially for the rylene diimide based n‐type semiconductors.
One‐step synthesis of nitrogen, boron co‐doped fluorescent carbon nanoparticles for glucose detection
Authors: Liang Meijuan , Ren Yi , Zhang Haijuan , Ma Yunxia , Niu Xiaoying , Chen Xingguo 
Published: March 2017

AbstractHeteroatom‐doped carbon nanoparticles (CNPs) have attracted considerable attention due to an effective improvement in their intrinsic properties. Here, a facile and simple synthesis of nitrogen, boron co‐doped carbon nanoparticles (NB‐CNPs) from a sole precursor, 3‐aminophenylboronic acid, was performed via a one‐step solid‐phase approach. Because of the presence of boronic acid, NB‐CNPs can be used directly as a fluorescent probe for glucose. Based on a boronic acid‐triggered specific reaction, we developed a simple NB‐CNP probe without surface modification for the detection of glucose. When glucose was introduced, the fluorescence of NB‐CNPs was suppressed through a surface‐quenching states mechanism. Obvious fluorescence quenching allowed the highly sensitive determination of glucose with a limit of detection of 1.8 μM. Moreover, the proposed method has been successfully used to detect glucose in urine from people with diabetes, suggesting potential application in sensing glucose.
Determination of (4‐(1,3‐dioxo‐1,3‐dihydro‐2H‐isoindol‐ 2‐yl)‐N′‐[(4‐ethoxyphenyl) methylidene] benzohydrazide, a novel anti‐inflammatory agent, in biological fluids by UPLC‐MS/MS: Assay development, validation and in vitro metabolic stability study
Authors: Iqbal Muzaffar , Bhat Mashooq A. , Raish Mohammad , Ezzeldin Essam 
Published: March 2017

AbstractA thalidomide analog, (4‐(1,3‐dioxo‐1,3‐dihydro‐2H‐isoindol‐2‐yl)‐N′‐[(4‐ethoxyphenyl) methylidene] benzohydrazide), has been identified as a promising broad‐spectrum anti‐inflammatory agent in previous study. In this study, a sensitive and selective UPLC‐MS/MS assay was developed and validated for its determination in rat plasma samples. The chromatographic separation was performed on an Aquity BEH C18 column using mobile phase comprising of acetonitrile and 10 mm ammonium acetate in the ratio of 85: 15, at flow rate of 0.3 mL/min. The detection and quantification were performed in positive multiple reaction monitoring mode by parent to daughter ion transition of 414.06 ˃ 148.05 for analyte and 411.18 ˃ 191.07 for internal standard (risperidone), respectively using electrospray ionization source. The sample extraction process consisted of liquid–liquid extraction method using diethyl ether as the extracting solvent. The assay was validated by following FDA guidelines and all parameters were found to be within acceptable limits. The linearity was between 10.1 and 2500 ng/mL and the lower limit of quantification was 10.1 ng/mL. The reported results indicate that the assay could meet the requirement for analysis of this compound in amounts expected to the present in actual samples. Further, in vitro metabolic stability study was performed in rat liver microsomes by using the validated assay.
Migraine prevalence in patients with unruptured intracranial aneurysms: A case–control study
Authors: Witvoet Elbert H. , Pelzer Nadine , Terwindt Gisela M. , Rinkel Gabriël J.E. , Vlak Monique H.M. , Algra Ale , Wermer Marieke J.H. 
Published: March 2017

AbstractObjectivesMigraine is a suggested risk factor for aneurysmal subarachnoid hemorrhage (aSAH). An increased risk of aSAH in migraineurs may be explained by an increased prevalence of unruptured intracranial aneurysms (UIA). We performed a case–control study to compare lifetime migraine prevalence in patients with UIA, patients with a history of transient ischemic attact (TIA) or ischemic stroke and controls without a history of aSAH, TIA or ischemic stroke.Materials and MethodsPatients with UIA were recruited from two university hospitals. Data on patients with TIA/stroke were retrieved from a previous study. Partners of patients with UIA or TIA/stroke were included as controls. Migraine history was assessed via a telephone interview based on the International Classification of Headache Disorders, second edition criteria. We calculated odds ratios (OR) for migraine with univariable and multivariable logistic regression analyses, adjusted for age, sex, hypertension and smoking.ResultsWe included 172 patients with UIA, 221 patients with TIA or stroke, and 164 controls. In UIA patients, migraine prevalence was 24.4% compared with 14.6% in controls (UIA vs. controls; OR 1.9; 95% confidence interval [CI] 1.1–3.5) and 22.2% in TIA/stroke patients (UIA vs. TIA/stroke; OR 1.1; 95% CI 0.7–1.8). After adjustments, the OR for migraine in UIA patients versus controls were 1.7 (95% CI 1.0–3.1) and 0.9 (95% CI 0.5–1.0) versus TIA/stroke. Results were comparable for migraine with and without aura.ConclusionsMigraine prevalence is possibly increased in patients with UIA compared with controls and comparable with the prevalence in patients with TIA or stroke. Further studies are needed to confirm our findings and to investigate the underlying pathophysiology.
Direct evaluative conditioning in brand placement: The impact of scene valence and prominence on brand placement repetition effects
Authors: D'Hooge Serena C. , Hudders Liselot , Cauberghe Veroline 
Published: March 2017

AbstractWhereas previous studies investigated the affect transfer from one specific affective stimulus of the brand placement context (such as an artist or the genre) to the brand, this research study investigates the effect of the valence of various scenes in which the brand is repeatedly placed on brand attitude. Direct evaluative conditioning theory suggests that pairing a brand repeatedly with various positive (negative) stimuli positively (negatively) affects brand attitude. The results of 2 experimental studies indicate that when a brand is repeatedly and prominently placed in different affective scenes of the same valence (a series of either positive or negative scenes), the affect aroused by those scenes influences explicit and implicit brand attitudes. In addition, whereas previous research found negative effects of brand prominence on brand evaluations, this study found that prominence positively moderates the affect transfer from the valence of various scenes on brand attitude. This implies that by placing the brand in various positive scenes, prominent brand placements can have a positive effect on recall and recognition and on brand attitude, which transcends the previously declared paradox of prominent placement.
Bioethylene Production from Ethanol: A Review and Techno‐economical Evaluation
Authors: Mohsenzadeh Abas , Zamani Akram , Taherzadeh Mohammad J. 
Published: March 2017

AbstractManufacturing of bioethylene via dehydration of bioethanol is an alternative to the fossil‐based ethylene production and decreases the environmental consequences for this chemical commodity. A few industrial plants that utilize 1st generation bioethanol for the bioethylene production already exist, although not functioning without subsidiaries. However, there is still no process producing ethylene from 2nd generation bioethanol. This study is divided into two parts. Different ethanol and ethylene production methods, the process specifications and current technologies are briefly discussed in the first part. In the second part, a techno‐economic analysis of a bioethylene plant was performed using Aspen® plus and Aspen Process Economic Analyzer, where different qualities of ethanol were considered. The results show that impurities in the ethanol feed have no significant effect on the quality of the produced polymer‐grade bioethylene. The capacity of the ethylene storage tank significantly affects the capital costs of the process.
Porokeratotic eccrine ostial and dermal duct nevus: a unique case treated with CO2 laser
Authors: Zade John , Jfri Abdulhadi , Nabatian Adam , Alajaji Abdullah , Geller Lauren , Khorasani Hooman 
Published: March 2017

Key Clinical MessagePorokeratotic eccrine ostial and dermal duct nevus (PEODDN) is a rare eccrine hamartoma, with treatment generally being unsatisfactory. The unique features of PEODDN presented include bilateral and facial lesions, and extensive body involvement. Management with CO2 laser was successful, and follow‐up will be necessary to monitor for recurrent lesions.
Third‐degree AV block sensitive to prednisolone 72 hours post AVNRT ablation
Authors: Parwani Abdul S. , Schröder Anna I. , Blaschke Daniela , Blaschke Florian , Huemer Martin , Attanasio Philipp , Pieske Burkert , Boldt Leif‐Hendrik , Haverkamp Wilhelm 
Published: March 2017

Key Clinical MessageA patient developed a transient first‐degree AV block during a radiofrequency ablation of an atrioventricular nodal reentrant tachycardia. Three days later the patient presented with a third‐degree AV block. It resolved within 24 h under antiphlogistic therapy. Patient was asymptomatic without necessity for pacemaker implantation at 12 months follow‐up.
Vogt‐Koyanagi‐Harada disease‐like posterior uveitis in the course of nivolumab (anti‐PD‐1 antibody), interposed by vemurafenib (BRAF inhibitor), for metastatic cutaneous malignant melanoma
Authors: Matsuo Toshihiko , Yamasaki Osamu 
Published: March 2017

Key Clinical MessageA patient with metastatic cutaneous malignant melanoma developed Vogt‐Koyanagi‐Harada disease‐like posterior uveitis after two nivolumab (anti‐PD‐1 antibody) injections. Vogt‐Koyanagi‐Harada disease, with the background of autoimmunity against choroidal melanocytes, suggests nivolumab be working by disintegrating inhibition circuit of T cells against a common epitope shared between melanoma cells and normal melanocytes.
Thromboelastometry‐guided blood transfusion in septic shock complicated with disseminated intravascular coagulation: a case report
Authors: Crochemore Tomaz , Nunes Dias Campos Flavia , Menezes Souza Pessoa Camila , Lima Rocha Leonardo , Zanella do Amaral Campos Pedro Paulo , Corrêa Thiago Domingos 
Published: March 2017

Key Clinical MessageApproximately 25–50% of septic patients develop disseminated intravascular coagulation. The thromboelastometry evaluates whole blood clot formation and dissolution in real time and has been considered for management of bleeding in diverse clinical conditions. We present a case of thromboelastometry‐guided bleeding management of a septic shock patient with overt disseminated intravascular coagulation (DIC).
Isolated intestinal type angioedema due to ACE‐inhibitor therapy
Authors: Palmquist Stephen , Mathews Benji 
Published: March 2017

Key Clinical MessageA 42‐year‐old woman presents with abdominal pain after taking her first dose of lisinopril. Visceral angioedema was diagnosed based on clinical suspicion and abdominal computed tomography (CT). Awareness of this rare side effect of a common medication is key to avoid delays in diagnosis and unnecessary procedures.
Di‐Zinc–Aryl Complexes: CO2 Insertions and Applications in Polymerisation Catalysis
Authors: Romain Charles , Garden Jennifer A. , Trott Gemma , Buchard Antoine , White Andrew J. P. , Williams Charlotte K. 
Published: March 2017

AbstractTwo new di‐zinc–aryl complexes, [LZn2Ph2] and [LZn2(C6F5)2], coordinated by a diphenol tetraamine macrocyclic ligand have been prepared and fully characterised, including by single‐crystal X‐ray diffraction experiments. The complexes’ reactivities with monomers including carbon dioxide, cyclohexene oxide, phthalic anhydride, isopropanol and phenol were investigated using both experimental studies and density functional theory calculations. In particular, [LZn2Ph2] readily inserts carbon dioxide to form a carboxylate, at 1 bar pressure, whereas [LZn2(C6F5)2] does not react. Under these conditions [LZn2Ph2] shows moderate activity in the ring‐opening copolymerisation of cyclohexene oxide/carbon dioxide (TOF=20 h−1), cyclohexene oxide/phthalic anhydride (TOF=33 h−1) and the ring‐opening polymerisations of rac‐lactide (TOF=99 h−1) and ϵ‐caprolactone (TOF=5280 h−1).
Organic Electron Acceptors Comprising a Dicyanomethylene‐Bridged Acridophosphine Scaffold: The Impact of the Heteroatom
Authors: Schaub Tobias A. , Brülls Steffen M. , Dral Pavlo O. , Hampel Frank , Maid Harald , Kivala Milan 
Published: March 2017

AbstractStable two‐electron acceptors comprising a dicyanomethylene‐bridged acridophosphine scaffold were synthesized and their reversible reduction potentials were efficiently tuned through derivatization of the phosphorus center. X‐ray crystallographic analysis combined with NMR, UV/Vis, IR spectroscopic, and electrochemical studies, supported by theoretical calculations, revealed the crucial role of the phosphorus atom for the unique redox, structural, and photophysical properties of these compounds. The results identify the potential of these electron deficient scaffolds for the development of functional n‐type materials and redox active chromophores upon further functionalization.
Luminescent NaYF4:Yb,Er upconversion nanocrystal colloids: Towards controlled synthesis and near‐infrared optical response
Authors: Duong Hau V. , Truong Quy‐Tung , Tran Thai‐Hoa , Nguyen Thanh‐Dinh , Viet Long Nguyen 
Published: March 2017

AbstractLanthanide‐doped upconversion nanocrystals are an emerging class of near‐IR‐sensitive luminescent nanomaterials that have aroused widespread interest in the investigation of their unique optical properties for sensing, biomedical, and energy applications. In this work, we have hydrothermally prepared NaYF4:Yb,Er upconversion nanocrystals that can respond with brilliant photoluminescence to near‐infrared laser light. The structural phase of the NaYF4:Yb,Er upconversion nanocrystals can be controlled by extending the hydrothermal reaction to visibly tune their emission intensity. The highly photoluminescent NaYF4:Yb,Er colloidal nanocrystals are subsequently assembled in host matrices of hard substrates and polymethyl methacrylate plastics by colloidal solution solidification to fabricate optical display components that may be useful as a potential alternative for fingerprint identification and encryption.
Palladium‐Catalyzed Intermolecular Oxidative Diazidation of Alkenes
Authors: Peng Haihui , Yuan Zheliang , Chen Pinhong , Liu Guosheng 
Published: March 2017

AbstractA palladium‐catalyzed oxidative vicinal diazidation of alkenes has been developed, in which TMSN3 was used as azide source. Both styrenes and unactivated alkenes are suitable for this reaction. And trans‐alkyldiazides were obtained as major products from cyclic alkenes with moderate to good diastereoselectivities. This reaction afforded an efficient way for the synthesis of useful 1,2‐diamines after hydrogenation.
Social media marketing through time‐aware collaborative filtering
Authors: De Maio Carmen , Fenza Giuseppe , Gallo Mariacristina , Loia Vincenzo , Parente Mimmo 
Published: March 2017

SummarySocial media is assuming a crucial role in purchasing decisions, and most companies are using social media for marketing. Making sense of the unstructured information content shared by users along the time is an emerging challenge. We advise that the dynamic nature with which trends and user's interests evolve along the timeline requires the revising of well‐assessed methods to address, for instance, recommendation provisioning, information retrieval, and so on. Time‐awareness is crucial to more effectively estimate user's interests in the future to better address social media marketing attempting to increase the traction, for instance, posting the right message at the right time. This work defines time‐aware collaborative filtering for estimating users' interest along the time in Twitter. It uses text analysis services to semantically annotate tweets' content and to track concepts considering post frequencies along the time. A model‐based approach implementing K‐Nearest Neighbors is used to estimate user's similarity representing their profile by sampling user's interest with three different techniques: Vectorial Representation, Symbolic Aggregation Approximation, and Median. We show the experimental results comparing these techniques and performing model training in different time windows. The proposed approach is used to address some social media marketing questions.
Coexisting with the dynamic PU, the effect of PU‐returns on a secondary network
Authors: Amini Mohammad Reza , Mahdavi Mehdi , Omidi Mohammad Javad 
Published: March 2017

SummaryCoexisting with a dynamic primary user network is a challenge in cognitive radio networks, since the rate at which primary user reoccupies the spectrum is high. Therefore, it is important to investigate deeply the effect of primary traffic dynamics on secondary network performance metrics. To do that, interference due to both sensing error and primary user re‐occupancy must be formulated and considered in throughput and collision probability. Besides them, secondary packet retransmissions due to such interference should be considered in metrics such as average energy consumption and average packet delay. In this study, we formulate the mentioned secondary network metrics regarding to such kinds of interference and secondary packet retransmission. Numerical results along with discussions are given to clarify derived expressions. Simulations are also performed to justify the theoretical results, and optimum operating point for secondary network settings is derived by genetic algorithm.
Exploring the impact of multidecadal environmental changes on the population genetic structure of a marine primary producer
Authors: Lundholm Nina , Ribeiro Sofia , Godhe Anna , Rostgaard Nielsen Lene , Ellegaard Marianne 
Published: March 2017

AbstractMany marine protists form resting stages that can remain viable in coastal sediments for several decades. Their long‐term survival offers the possibility to explore the impact of changes in environmental conditions on population dynamics over multidecadal time scales. Resting stages of the phototrophic dinoflagellate Pentapharsodinium dalei were isolated and germinated from five layers in dated sediment cores from Koljö fjord, Sweden, spanning ca. 1910–2006. This fjord has, during the last century, experienced environmental fluctuations linked to hydrographic variability mainly driven by the North Atlantic Oscillation. Population genetic analyses based on six microsatellite markers revealed high genetic diversity and suggested that samples belonged to two clusters of subpopulations that have persisted for nearly a century. We observed subpopulation shifts coinciding with changes in hydrographic conditions. The large degree of genetic diversity and the potential for both fluctuation and recovery over longer time scales documented here, may help to explain the long‐term success of aquatic protists that form resting stages.
Egg limitation and individual variation in parasitization risk among hosts in host–parasitoid dynamics
Authors: Okuyama Toshinori 
Published: March 2017

AbstractEgg limitation is known to destabilize host–parasitoid dynamics. This study reexamines the effect of egg limitation in light of the individual variation in parasitization risk among hosts (e.g., some hosts are more likely to be parasitized than others). Previous studies have considered egg limitation (predicted as a destabilizing factor) and individual variation among hosts (predicted as a stabilizing factor) in isolation; however, their interaction is not known. An individual‐based model was used to examine the effects of each factor and their interaction. The model‐based analysis shows a clear interaction between egg limitation and individual variation in risk among hosts. Egg limitation can both stabilize and destabilize host–parasitioid dynamics depending on the presence and absence of the risk variation. The result suggests that the population‐dynamic consequences of egg limitation are more complex than previously thought and emphasizes the importance of the simultaneous consideration of multiple ecological factors (with individual‐level details) to uncover potential interactions among them.