bluuebunny/crossref_metadata_2025_split huggingface dataset:
DBU‐Mediated Synthesis of Aryl Acetylenes or 1‐Bromoethynylarenes from Aldehydes
Authors: Thummala Yadagiri , Karunakar Galla V. , Doddi Venkata Ramana 
Published: November 2018

AbstractTwo well known synthetic organic reactions Ramirez olefination and Corey‐fuchs reactions are integrated in one‐pot sequential manner for the synthesis of arylacetylenes and 1,3‐enynes starting directly from commercially available aldehydes. The bicyclic amidine 1,8‐diazabicyclo[5.4.0]undec‐7‐ene (DBU) along with additive NaOH not only exclusively afforded the terminal alkynes directly from the aldehydes, but also enhanced the reaction rate. The dynamic nature of DBU also facilitated the isolation of 1‐bromoalkynes intermediate products. Selection of additive from NaOH and H2O served as a switch for the synthesis of terminal alkyne and 1‐bromoalkynes, respectively.magnified image
Ordered mesoporous SBA‐15 functionalized with yttrium(III) and cerium(III) complexes: Towards active heterogeneous catalysts for oxidation of sulfides and preparation of 5‐substituted 1H‐tetrazoles
Authors: Molaei Somayeh , Tamoradi Taiebeh , Ghadermazi Mohammad , Ghorbani‐Choghamarani Arash 
Published: November 2018

Mesoporous SBA‐15 was synthesized and modified with 3‐chloropropyltrimethoxysilane and then used in immobilization of creatinine groups, which were employed to introduce Y3+ and Ce3+ to give rise to two novel yttrium and cerium catalysts: SBA‐15@Creatinine@M (M = Y and Ce). The structures of the SBA‐15@Creatinine@M catalysts were determined using various techniques. These catalysts offered outstanding catalytic performances in the oxidation of sulfides to sulfoxides and in the preparation of 5‐substituted 1H‐tetrazoles. An important characteristic of the SBA‐15@Creatinine@M catalysts is that they are very stable without a considerable decrease in their catalytic performance lasting seven cycles.
Three‐Dimensional Graphene‐based N‐doped Carbon Composites as High‐Performance Anode Materials for Sodium‐ion Batteries
Authors: Chang Bin , Chen Jing , Zhou Mingan , Zhang Xiaojie , Wei Wei , Dai Bin , Han Sheng , Huang Yanshan 
Published: November 2018

AbstractA nitrogen‐doped carbon layer coating on a 3D graphene framework (NCL@GF) was produced by the in‐situ polymerization of a uniform polyimide layer on the graphene framework surface and a carbonization process. The NCL@GF exhibited a 3D macroporous structure with uniform N‐doped porous carbon layers and a high 5.4 at. % nitrogen content, which not only effectively enhanced the active sites but also facilitated fast ion and electron transport in the 3D pathways. Consequently, the NCL@GF as the anode of a sodium‐ion battery (SIB) exhibited a discharge capacity of 357 mAh g−1 at 0.1 A g−1 after 200 cycles, a remarkable rate capability with a capacity of 122 mAh g−1 at 8 A g−1, and a super long cycle life with a capacity retention of 70 % capacity after 2500 cycles at 0.5 A g−1. Such performance is superior to that of previously reported carbon or graphene‐based composites.
Cover Image, Volume 12, Issue 6
Authors: Distler Tobias , Sitzmann Werner 
Published: November 2018

The cover image by is based on the Perspective An investigation on additives for pelletizing highly torrefi ed biomass by Tobias Distler and Werner Sitzmann, DOI: 10.1002/bbb.1919. Image Credit: ©Amandus Kahl GmbH & Co.
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Contemporary transradial access practices: Results of the second international survey
Authors: Shroff Adhir R. , Fernandez Christopher , Vidovich Mladen I. , Rao Sunil V. , Cowley Michael , Bertrand Olivier F. , Patel Tejas M. , Pancholy Samir B. 
Published: November 2018

AbstractObjectivesTo gain insight into current practice of transradial angiography and intervention in the United States and around the world.BackgroundTransradial access (TRA) has grown worldwide. In a prior survey, there was significant practice variation and there was minimal US participation which limited the generalizability to US operators.MethodsWe used an internet‐based survey software program to solicit input from practicing interventional cardiologists from the United States and around the world. US operators were compared with outside the United States (OUS) operators and respondent‐level comparisons were made with the prior survey to assess for temporal changes in practice.ResultsBetween August 2016 and January 1, 2017, 125 interventional cardiologists completed the survey representing 91 countries with the United States having 449 (39.9%) respondents. Preprocedure, noninvasive testing for collateral circulation is used more commonly in the United States (54.1%) than around the world (26.6%) but its use has decreased since 2010. In the US, 48.8% of operators never use ultrasound and 92.6% of OUS operators never use it; only 4.4% overall use ultrasound in >50% of cases. Use of bivalirudin has decreased in the US and OUS. Nearly, 30% of operators do not assess for radial artery patency following hemostasis. US respondents used TRA less commonly for primary PCI for STEMI than their global counterparts.ConclusionsThere is wide variation in how TRA procedures are performed including relatively low rates of adherence to practices that are known to improve outcomes. Further education aimed at increasing use of best practices will impact patient outcomes.
Reversal of Tabun Toxicity Enabled by a Triazole‐Annulated Oxime Library—Reactivators of Acetylcholinesterase
Authors: Kovarik Zrinka , Kalisiak Jarosław , Hrvat Nikolina Maček , Katalinić Maja , Zorbaz Tamara , Žunec Suzana , Green Carol , Radić Zoran , Fokin Valery V. , Sharpless K. Barry , Taylor Palmer 
Published: November 2018

AbstractAcetylcholinesterase (AChE), an enzyme that degrades the neurotransmitter acetylcholine, when covalently inhibited by organophosphorus compounds (OPs), such as nerve agents and pesticides, can be reactivated by oximes. However, tabun remains among the most dangerous nerve agents due to the low reactivation efficacy of standard pyridinium aldoxime antidotes. Therefore, finding an optimal reactivator for prophylaxis against tabun toxicity and for post‐exposure treatment is a continued challenge. In this study, we analyzed the reactivation potency of 111 novel nucleophilic oximes mostly synthesized using the CuAAC triazole ligation between alkyne and azide building blocks. We identified several oximes with significantly improved in vitro reactivating potential for tabun‐inhibited human AChE, and in vivo antidotal efficacies in tabun‐exposed mice. Our findings offer a significantly improved platform for further development of antidotes and scavengers directed against tabun and related phosphoramidate exposures, such as the Novichok compounds.
Pd‐Catalyzed Annulation of 1‐Halo‐8‐arylnaphthalenes and Alkynes Leading to Heptagon‐Embedded Aromatic Systems
Authors: Yan Jianming , Rahman Md. Shafiqur , Yoshikai Naohiko 
Published: November 2018

AbstractA palladium‐catalyzed heptagon‐forming annulation reaction between 1‐halo‐8‐arylnaphthalene and diarylacetylene is reported. The reaction is promoted using a catalytic system comprised of Pd(OAc)2, moderately electron‐deficient triarylphosphine P(4‐ClC6H4)3, and Ag2CO3 to afford benzo[4,5]cyclohepta[1,2,3‐de]naphthalene derivatives in moderate to good yields, in preference to fluoranthene as a competing byproduct. Twofold annulation can also be achieved to access a novel heptagon‐embedded polycyclic aromatic hydrocarbon compound.
Novel prognostic markers within the CD44‐stromal ligand network in pancreatic cancer
Authors: Franklin Oskar , Billing Ola , Öhlund Daniel , Berglund Anette , Herdenberg Carl , Wang Wanzhong , Hellman Urban , Sund Malin 
Published: November 2018

AbstractThe dense stroma in pancreatic cancer tumours is rich in secreted extracellular matrix proteins and proteoglycans. Secreted hyaluronan, osteopontin and type IV collagen sustain oncogenic signalling by interactions with CD44s and its variant isoform CD44v6 on cancer cell membranes. Although well established in animal and in vitro models, this oncogenic CD44‐stromal ligand network is less explored in human cancer. Here, we use a pancreatic cancer tissue microarray from 69 primary tumours and 37 metastatic lymph nodes and demonstrate that high tumour cell expression of CD44s and, surprisingly, low stromal deposition of osteopontin correlate with poor survival independent of established prognostic factors for pancreatic cancer. High stromal expression of hyaluronan was a universal trait of both primary tumours and metastatic lymph nodes. However, hyaluronan species of different molecular mass are known to function differently in pancreatic cancer biology and immunohistochemistry cannot distinguish between them. Using gas‐phase electrophoretic molecular mobility analysis, we uncover a shift towards high molecular mass hyaluronan in pancreatic cancer tissue compared to normal pancreas and at a transcriptional level, we find that hyaluronan synthesising HAS2 correlates positively with CD44. The resulting prediction that high molecular mass hyaluronan would then correlate with poor survival in pancreatic cancer was confirmed in serum samples, where we demonstrate that hyaluronan >27 kDa measured before surgery is an independent predictor of postoperative survival. Our findings confirm the prognostic value of CD44 tissue expression and highlight osteopontin tissue expression and serum high molecular mass hyaluronan as novel prognostic markers in pancreatic cancer.
Targeted Synthesis of Complex Spiro[3H‐indole‐3,2′‐pyrrolidin]‐2(1H)‐ones by Intramolecular Cyclization of Azomethine Ylides: Highly Potent MDM2–p53 Inhibitors
Authors: Gollner Andreas , Weinstabl Harald , Fuchs Julian E. , Rudolph Dorothea , Garavel Geraldine , Hofbauer Karin S. , Karolyi‐Oezguer Jale , Gmaschitz Gerhard , Hela Wolfgang , Kerres Nina , Grondal Elisabeth , Werni Patrick , Ramharter Juergen , Broeker Joachim , McConnell Darryl B. 
Published: November 2018

AbstractMouse double minute 2 (MDM2) is a main and direct inhibitor of the crucial tumor suppressor p53. Reports from initial clinical trials showed that blocking this interaction with a small‐molecule inhibitor can have great value in the treatment of cancer for patients with p53 wild‐type tumors; however, it also revealed dose‐limiting hematological toxicities and drug‐induced resistance as main issues. To overcome the former, an inhibitor with superior potency and pharmacokinetic properties to ultimately achieve full efficacy with less‐frequent dosing schedules is required. Toward this aim, we optimized our recently reported spiro‐oxindole inhibitors by focusing on the crucial interaction with the amino acid side chain of His96MDM2. The designed molecules required the targeted synthesis of structurally complex spiro[indole‐3,2′‐pyrrolo[2,3‐c]pyrrole]‐2,4′‐diones for which we developed an unprecedented intramolecular azomethine ylide cycloaddition and investigated the results by computational methods. One of the new compounds showed superior cellular potency over previously reported BI‐0252. This finding is a significant step toward an inhibitor suitable to potentially mitigate hematological on‐target adverse effects.
Structure–Activity Relationships of Hexahydrocyclopenta[c]quinoline Derivatives as Allosteric Inhibitors of CDK2 and EGFR
Authors: Carlino Luca , Christodoulou Michael S. , Restelli Valentina , Caporuscio Fabiana , Foschi Francesca , Semrau Marta S. , Costanzi Elisa , Tinivella Annachiara , Pinzi Luca , Lo Presti Leonardo , Battistutta Roberto , Storici Paola , Broggini Massimo , Passarella Daniele , Rastelli Giulio 
Published: November 2018

AbstractFollowing the discovery of a type III allosteric modulator of cyclin‐dependent kinase 2 (CDK2) characterized by a hexahydrocyclopenta[c]quinolone scaffold, three different series of its derivatives were synthesized and biologically evaluated. Docking of the synthesized compounds into the allosteric pocket of CDK2 allowed the elucidation of structure–activity relationships (SARs). Moreover, the compounds were tested on the wild‐type epidermal growth factor receptor (EGFR) kinase domain (KD) and its clinically relevant T790M/L858R mutant form. Herein we describe the first SAR investigation of allosteric ligands that bind to the type III inhibitor pocket of CDK2 and EGFR‐KD. Although the activity of the synthesized inhibitors needs to be improved, the obtained results provide clear‐cut indications about pharmacophore requirements and selectivity determinants. Remarkably, this study led to the identification of a selective T790M/L858R EGFR allosteric inhibitor that is inactive toward both wild‐type EGFR and CDK2. Finally, docking into the T790M/L858R EGFR‐KD led us to hypothesize that the compounds bind to the double‐mutant EGFR‐KD by adopting a binding mode different from that in CDK2, thus rationalizing the observed selectivity profile.
Role of adjuvant therapy in resected stage IA subcentimeter (T1a/T1b) pancreatic cancer
Authors: Shaib Walid L. , Narayan Amit Surya , Switchenko Jeffrey M. , Kane Sujata R. , Wu Christina , Akce Mehmet , Alese Olatunji B. , Patel Pretesh R. , Maithel Shishir K. , Sarmiento Juan M. , Kooby David A. , El‐Rayes Bassel F. 
Published: November 2018

BackgroundThe standard of care for patients with resected stage I to stage III pancreatic ductal adenocarcinoma (PDAC) is adjuvant gemcitabine‐based chemotherapy. The role of adjuvant treatment in patients with subcentimeter, stage IA PDAC is unknown. The current study evaluated the effect of adjuvant treatment on survival outcomes among patients with American Joint Committee on Cancer/International Union Against Cancer stage IA (T1N0) resected PDAC using the National Cancer Data Base (NCDB).MethodsA retrospective review of the NCDB was conducted for patients diagnosed with T1 (tumor limited to the pancreas and measuring ≤2 cm in greatest dimension), lymph node–negative (N0), resected PDAC between 2004 and 2013. Patient demographics, histology, adjuvant treatment, and survival trends were examined. Kaplan‐Meier analysis and log‐rank tests were performed to determine the unadjusted association between overall survival (OS), tumor size, and treatment.ResultsA total of 876 patients met the inclusion criteria. The patients had a mean age of 66.2 years (range, 32‐90 years); approximately 83.3% were white (730 patients) and 53.1% were female (465 patients). Approximately 45.9% of the patients had moderately differentiated tumor histology (402 patients); 70.0% (613 patients) had tumors measuring 1 to 2 cm (T1c) and 30.0% (263 patients) had tumors measuring <1 cm (T1a/T1b). Approximately 94.2% of patients had negative surgical margins (815 patients) and 46.9% (410 patients) received adjuvant therapy. The median OS was significantly different for patients who received adjuvant therapy compared with patients who did not (70.7 months vs 46.9 months; P = .0001). For patients with tumors measuring <1 cm, survival was not found to be significantly different between patients who received adjuvant treatment compared with those who did not (not reached vs 85.3 months; P = .54). In the multivariable analysis, none of the covariates (treatment group, Charlson‐Deyo Score, age, insurance, and facility status) demonstrated significant differences for patients with tumors measuring <1 cm.ConclusionsThe current study is the first to demonstrate no survival benefit for adjuvant therapy in patients with resected subcentimeter PDAC.
Novelty‐driven recommendation by using integrated matrix factorization and temporal‐aware clustering optimization
Authors: Raja Kumar , Pushpa S. 
Published: November 2018

SummaryWith the rapid proliferation of information and communication technology (ICT), the vast amount of available data creates information overload. The Websites and e‐commerce applications employ several information filtering methods such as personalized recommender system to manage the information overload. The recommender system assists the users in obtaining the desired list of products based on their interest. Several existing research works focus on the novelty or unexpectedness in the recommendation list while ensuring the quality to enhance the recommendation mechanism. It is essential to balance the unexpected and useful products or services to generate the satisfactory personalized recommendations with novelty. Thus, this paper proposes a novelty‐driven movie suggestion using integrated matrix factorization and temporal‐aware clustering optimization (NOMINATE). The proposed approach determines the personalized preferences through probabilistic matrix factorization (PMF) and contextually updates the rules and extracts the user preferences based on the inherent features of both the users and movies with temporal information. The NOMINATE approach also suggests the novelty‐driven, and desired top‐N movies to the users through the K‐means, and particle swarm optimization (PSO)‐based clustering algorithm with the help of LOD source. To identify the expert users, the NOMINATE approach applies the K‐means and PSO‐based clustering algorithm to enrich the personalized features of the users. Moreover, it integrates the relevant features with the preferred set of features for each user using the LOD source and decides a set of optimal preferences of the users. Finally, the NOMINATE approach generates the top‐N recommendation list for the corresponding user through ranking method. The experiment results stipulate that the NOMINATE approach personalize the top‐N movie recommendations with high performance regarding accuracy and novelty when compared with the existing recommendation method.
LTE efficiency when used in traffic information systems: A stable interest aware clustering
Authors: Ahmad Iftikhar , Md Noor Rafidah , Reza Z'aba Muhammad 
Published: November 2018

SummaryLong‐term evolution (LTE) technology is critical for the envisioned usage scenarios in the Internet of Vehicles. An important usage scenario is traffic information systems (TIS) for vehicular ad hoc networks (VANETs) that depend on LTE for the delivery of non‐safety information to vehicles. TISs are centralized data warehouses that collect and process traffic information and subsequently allow vehicles to receive such information before and during a road trip. Considering the extensive deployment of VANETs, the LTE demand for TIS is expected to increase. Therefore, we explore and quantify the inefficiency of LTE when used in TIS. By envisioning basic test case scenarios, we establish the trends of data usage while commuting and providing insights into how LTE usage in TIS may lead to the inefficient use of the available wireless spectrum during road trips. To reduce identified inefficiency in LTE usage and cluster instability due to the high speed of the vehicles, we proposed a novel stable interest‐aware clustering (SIAC) mechanism. SIAC consider VANETs mobility constraint, LTE link quality, and exploit interest of the vehicles, in cluster formation phase. Resulting in the reduction in the data demand of the vehicles and frequency of link failures among the vehicles and provides transmission path stability. SIAC performs well as compared with the existing approaches shows more cluster stability and reduces the LTE usage for driving assistance and route planning applications.
Divergence in female damselfly sensory structures is consistent with a species recognition function but shows no evidence of reproductive character displacement
Authors: Barnard Alexandra A. , Masly John P. 
Published: November 2018

AbstractMales and females transmit and receive signals prior to mating that convey information such as sex, species identity, or individual condition. In some animals, tactile signals relayed during physical contact between males and females before and during mating appear to be important for mate choice or reproductive isolation. This is common among odonates, when a male grasps a female's thorax with his terminal appendages prior to copulation, and the female subsequently controls whether copulation occurs by bending her abdomen to complete intromission. It has been hypothesized that mechanosensory sensilla on the female thoracic plates mediate mating decisions, but is has been difficult to test this idea. Here, we use North American damselflies in the genusEnallagma(Odonata: Coenagrionidae) to test the hypothesis that variation in female sensilla traits is important for species recognition.Enallagma annaandE. carunculatumhybridize in nature, but experience strong reproductive isolation as a consequence of divergence in male terminal appendage morphology. We quantified several mechanosensory sensilla phenotypes on the female thorax among multiple populations of both species and compared divergence in these traits in sympatry versus allopatry. Although these species differed in features of sensilla distribution within the thoracic plates, we found no strong evidence of reproductive character displacement among the sensilla traits we measured in regions of sympatry. Our results suggest that species‐specific placement of female mechanoreceptors may be sufficient for species recognition, although other female sensory phenotypes might have diverged in sympatry to reduce interspecific hybridization.
Real‐world GLP‐1 RA therapy in type 2 diabetes: A long‐term effectiveness observational study
Authors: Tofé Santiago , Argüelles Iñaki , Mena Elena , Serra Guillermo , Codina Mercedes , Urgeles Juan Ramón , García Honorato , Pereg Vicente 
Published: November 2018

SummaryAimsTo evaluate in a real‐world setting the effectiveness and tolerability of available GLP‐1 RA drugs in patients with type 2 diabetes after a prolonged follow‐up.Materials and methodsObservational, retrospective, single‐centre study in patients starting GLP‐1 RA therapy. Change in HbA1c, fasting plasma glucose (FPG) and body mass index (BMI) along with gastrointestinal (GI) adverse events and withdrawal from GLP‐1 RA therapy were evaluated. Lack of efficacy of GLP‐1 RA therapy according to prespecified goals was also measured.ResultsA total of 735 patients were included, mean age 59.7 years, duration of diabetes 9.01 years, HbA1c 8.18% and BMI 38.56 kg/m2. Average follow‐up was 18.97 months (range 4.2‐39.09). All HbA1c (0.93%; P < 0.01), FPG (24 mg/dL; P < 0.01) and BMI (1.55 kg/m2; P < 0.05) were significantly reduced from baseline and maintained throughout follow‐up, regardless of prescribed GLP‐1 RA. GI adverse events were present in 13.81% of patients at first follow‐up visit, 37.07% of patients discontinued GLP‐1 RA treatment, and 38.63% did not meet efficacy goals.ConclusionsIn a real‐world setting, GLP‐1 RA therapy is largely prescribed in severely obese patients with a long‐standing and poorly controlled diabetes. All prescribed GLP‐1 RAs significantly decreased HbA1c, FPG and BMI. GI adverse events affected a low proportion of patients. Inversely, a high proportion of patients did not meet efficacy goals and/or discontinued GLP‐1 RA treatment. Baseline characteristics of patients and lack of adherence may represent important issues underlying differences in effectiveness in real‐world studies versus randomized trials.