bluuebunny/crossref_metadata_2025_split huggingface dataset:
Biologically Active Heterocyclic Hybrids Based on Quinazolinone, Benzofuran and Imidazolium Moieties: Synthesis, Characterization, Cytotoxic and Antibacterial Evaluation
Authors: Asadi Parvin , Khodarahmi Ghadamali , Jahanian‐Najafabadi Ali , Saghaie Lotfollah , Hassanzadeh Farshid 
Published: December 2016

Cytotoxic and antimicrobial agents structurally based on quinazolinone, benzofuran and imidazole pharmacophores, have been designed and synthesized. Spectral (IR, 1H‐NMR) and elemental analysis data established the structures of these novel 3‐[1‐(1‐benzofuran‐2‐yl)‐2‐(4‐oxoquinazolin‐3(4H)‐yl)ethyl]‐1‐methyl‐1H‐imidazol‐3‐ium chloride hybrid derivatives. All the synthesized compounds were evaluated for in vitro cytotoxicity and antimicrobial activities. Cytotoxic evaluation using MTT assay revealed that compounds 12c, 12g and 12i exhibited significant cytotoxicity with IC50 values 1, 1, and 0.57 μm on this cell line, respectively. Biological activity of the synthesized compounds as antibacterial agent were also evaluated against three Gram‐negative (Escherichia coli, Pseudomonas aeruginosa and Salmonella typhi), three Gram‐positive (Staphylococcus aureus, Bacillus subtilis and Listeria monocitogenes) and one yeast‐like fungi (Candida albicans) strains. All compounds 12a – 12i showed slightly higher activity against Gram‐positive bacteria than the Gram‐negative one. Among the nine new compounds screened, 3‐[1‐(5‐bromo‐1‐benzofuran‐2‐yl)‐2‐(6‐chloro‐4‐oxoquinazolin‐3(4H)‐yl)ethyl]‐1‐methyl‐1H‐imidazol‐3‐ium chloride (12e) has pronounced higher antimicrobial activity against all tested strains. These results demonstrated potential importance of molecular hybridization in the development of new lead molecules with major cytotoxicity and antimicrobial activity.
A Specific Activity‐Based Probe to Monitor Family GH59 Galactosylceramidase, the Enzyme Deficient in Krabbe Disease
Authors: Marques André R. A. , Willems Lianne I. , Herrera Moro Daniela , Florea Bogdan I. , Scheij Saskia , Ottenhoff Roelof , van Roomen Cindy P. A. A. , Verhoek Marri , Nelson Jessica K. , Kallemeijn Wouter W. , Biela‐Banas Anna , Martin Olivier R. , Cachón‐González M. Begoña , Kim Nee Na , Cox Timothy M. , Boot Rolf G. , Overkleeft Herman S. , Aerts Johannes M. F. G. 
Published: December 2016

AbstractGalactosylceramidase (GALC) is the lysosomal β‐galactosidase responsible for the hydrolysis of galactosylceramide. Inherited deficiency in GALC causes Krabbe disease, a devastating neurological disorder characterized by accumulation of galactosylceramide and its deacylated counterpart, the toxic sphingoid base galactosylsphingosine (psychosine). We report the design and application of a fluorescently tagged activity‐based probe (ABP) for the sensitive and specific labeling of active GALC molecules from various species. The probe consists of a β‐galactopyranose‐configured cyclophellitol‐epoxide core, conferring specificity for GALC, equipped with a BODIPY fluorophore at C6 that allows visualization of active enzyme in cells and tissues. Detection of residual GALC in patient fibroblasts holds great promise for laboratory diagnosis of Krabbe disease. We further describe a procedure for in situ imaging of active GALC in murine brain by intra‐cerebroventricular infusion of the ABP. In conclusion, this GALC‐specific ABP should find broad applications in diagnosis, drug development, and evaluation of therapy for Krabbe disease.
Palladium‐Mediated Labeling of Nucleic Acids
Authors: Defrancq Eric , Messaoudi Samir 
Published: December 2016

AbstractNew applications of Pd‐catalyzed coupling reactions (Suzuki–Miyaura, Sonogashira, and Stille–Migita coupling) for post‐conjugation of nucleic acids have been developed recently. Breakthroughs in this area might now pave the way for the development of sophisticated DNA probes, which might be of great interest in chemical biology, nanotechnology, and bioanalysis, as well as in diagnostic domains.
Ammonia Decomposition and Synthesis over Multinary Magnesioferrites: Promotional Effect of Ga on Fe Catalysts for the Decomposition Reaction
Authors: Ortega Klaus Friedel , Rein Denise , Lüttmann Christian , Heese Justus , Özcan Fatih , Heidelmann Markus , Folke Jan , Kähler Kevin , Schlögl Robert , Behrens Malte 
Published: December 2016

AbstractMagnesioferrite (MgFe2O4)‐derived Mesoporous spinels of the type MgFeM3+O4 with M3+=Fe, Al, and Ga obtained upon calcination of hydrotalcite‐like compounds were investigated in the ammonia decomposition reaction at 1 bar and the synthesis of ammonia at 90 bar. The corresponding precursors were synthesized by co‐precipitation at 50 °C and constant pH of 10.5. N2 physisorption, PXRD, HR‐TEM, H2‐TPR, and NH3‐TPD were applied in order to obtain information about the textural, (micro‐)structural, solid‐state kinetics in reducing atmosphere, and adsorption properties of the samples. While phase‐pure layered double hydroxides (LDHs) were obtained for Al and Ga, magnesioferrite as the desired oxide phase and a low fraction of magnetite were formed besides the targeted precursor phase during co‐precipitation in the presence of Fe2+ and Fe3+ species. Reduction of the binary and ternary magnesioferrites occurs via two consecutive reactions. Only the second stage is shifted towards higher temperatures after incorporation of Al and Ga. The latter element boosts the catalytic decomposition of ammonia, yielding a 2‐fold and 5‐fold higher conversion at 500 °C compared to the samples containing Fe3+ and Al3+ species, respectively. In situ XRD measurements showed that this unprecedented promotional effect is related to the generation of (Fe, Ga)Fe3N. This phase, however, is detrimental for the synthesis of ammonia at elevated pressures in which the binary system outperforms the ternary spinels, yielding 30 % of the activity obtained with a highly promoted Fe‐based industrial catalyst.
Surface and Mechanical Properties of Nanoparticulate Resin Coatings and Their Toxicological Characterization
Authors: Sambale Franziska , Hesselbach Jutta , Finke Benedikt , Schilde Carsten , Stahl Frank , Bahnemann Detlef , Scheper Thomas , Kwade Arno 
Published: December 2016

AbstractA process chain to produce and characterize nanoparticulate, hydrophobic resin coatings was investigated. The investigated process stain could be used for sanitary applications, for instance. Nanocomposites might have a potential risk to humans and the environment. Thus, not only the manufacturing process, but also the achievable product properties were examined. Toxicological investigations with regard to the nanoparticle sizes and solid contents used were performed by investigating the impact of the nanoparticles on lung (A549 cells) and liver (HepG2 cells) cells. Results included showed that by using modified alumina the product properties could be improved in terms of hydrophobicity and mechanical properties and that alumina particles were nontoxic. However, cell viability was slightly affected by the nanocomposite extracts, depending on the applied particle size and concentration in the nanocomposites.
Optimization of Epoxidized Methyl Acetoricinoleate Synthesis by Response Surface Methodology
Authors: Xu Wei , Ge Xiao-Dong , Cheng De-Lin , Shao Rong , Ding Jian-Fei , Yan Xiu-Hua , Liu Ting-Ting 
Published: December 2016

AbstractEpoxidized methyl acetoricinoleate (EMAR) was generated by epoxidation of methyl acetoricinoleate (MAR) in the presence of formic acid and hydrogen peroxide by using ionic liquids as catalysts, and the product was characterized by means of infrared spectroscopy and mass spectrometry. The efficiencies of four different catalysts, 1‐methylimidazole hydrogen sulfate salt ([Hmim]HSO4), 1‐methylpyrrolidone hydrogen sulfate salt ([Hnmp]HSO4), phosphoric acid, and sulfuric acid, were compared. The effects of the formic acid/MAR molar ratio, hydrogen peroxide/MAR molar ratio, reaction temperature, reaction time, and catalyst dosage on the epoxy value of EMAR were investigated by single‐factor experiments.
Improvement of Efficiency and Emissions from Wood Log Stoves by Retrofit Solutions
Authors: Matthes Mirjam , Hartmann Ingo 
Published: December 2016

AbstractBiomass combustion systems contribute to the use of renewables, whereby wood log stoves have a high share for domestic heating. Promotion of renewables and efforts for lower air pollution require an improvement of technology. Short‐term effects can be achieved with the help of various retrofit systems. Apart from a survey of available systems, two measurements have been analyzed: additional heat exchange and emission reduction by catalysis. During normal operation of three low‐cost stoves, high levels of carbon monoxide (CO), volatile organic compounds (VOCs), and particulate matter (PM) concentration have been observed, having a major influence of the operator's behavior. The best case scenario with the retrofit systems resulted in a significant efficiency increase and as well a reduction of CO, VOCs, and PM.
Dry Cleaning of Fine Coal Based on Gas‐Solid Two‐Phase Flow: A Review
Authors: Yang Xuliang , Zhao Yuemin , Luo Zhenfu 
Published: December 2016

AbstractDry cleaning of coal becomes increasingly significant to improve energy efficiency and reduce air pollutant emissions. Fine coal dry cleaning processes are mostly based on gas‐solid two‐phase flow and mainly classified into the following three categories. Modified air‐dense medium‐fluidized bed cleaning has high cleaning accuracy, but confronts the problems of product purification and medium recovery. Density‐segregation gas‐fluidized bed cleaning does not use artificial medium solids and is characterized by a simple process and stable performance. However, its cleaning accuracy is relatively low. Air table cleaning also uses no artificial medium and separates fine coal depending on the differences in density and coefficient of friction. Its cleaning accuracy is approximate to that of density‐segregation gas‐fluidized bed cleaning but has more influential factors.
Synthesis, Characterization, and Catalytic Activities of A Nickel(II) Monoamido‐Tetradentate Complex: Evidence For NiIII–Oxo and NiIV–Oxo Species
Authors: Bok Kwon Hee , Lee Myoung Mi , You Ga Rim , Ahn Hye Mi , Ryu Ka Young , Kim Sung‐Jin , Kim Youngmee , Kim Cheal 
Published: December 2016

AbstractA new mononuclear nickel(II) complex, [NiII(dpaq)Cl] (1), containing a tetradentate monoamido ligand, dpaq (dpaq=2‐[bis(pyridin‐2‐ylmethyl)amino]‐N‐(quinolin‐8‐yl)acetamide), has been synthesized and characterized by IR spectroscopy, elemental analysis, and UV/Vis spectroscopy. The structure of the nickel complex has been determined by X‐ray crystallography. This nonheme NiII complex 1 catalyzed the epoxidation reaction of a wide range of olefins with meta‐chloroperoxybenzoic acid (m‐CPBA) under mild conditions. Olefin epoxidation using this catalytic system has been proposed to involve a new reactive NiIV–oxo (4) species, based on the evidence from a PPAA (peroxyphenylacetic acid) probe, Hammett studies, H218O exchange experiments, and ESI mass spectroscopic analysis. Moreover, the nature of solvent significantly influenced partitioning between heterolytic and homolytic O−O bond cleavage of the Ni–acylperoxo intermediate (2). The O−O bond of 2 proceeded predominantly through heterolytic cleavage in a protic solvent, such as CH3OH. These results suggest that possibly a NiIV–oxo species is a common reactive intermediate in protic solvents. The two active oxidants, namely NiIV–oxo (3) and NiIII–oxo (4), which are responsible for stereospecific olefin epoxidation and radical‐type oxidations, respectively, operate in aprotic solvents.
Intramolecular anti‐Phosphinoauration of Alkynes: An FLP‐Motivated Approach to Stable Aurated Phosphindolium Complexes
Authors: Arndt Sebastian , Hansmann Max M. , Motloch Petr , Rudolph Matthias , Rominger Frank , Hashmi A. Stephen K. 
Published: December 2016

AbstractThe synthesis of aurated phosphindolium complexes from easy accessible 1,5‐alkynylphosphine derivatives has been studied by using gold(I) complexes featuring carbene and phosphine ligands as initiators. Upon formation of the mixed phosphine NHC/phosphine gold species, elevated temperatures induced the cyclization to give stable aurated phosphindolium salts, which is supported by DFT calculations. The key elementary step that comprises a yet unknown anti‐phosphinoauration of an unactivated alkyne is favored if bulky NHC ligands are used which was analyzed by kinetic measurements. This concept could furthermore be extended to neutral (phosphindolium)AuCl complexes featuring the yet unknown phosphindole ligand.
Direct chiral separations of the enantiomers of phenylpyrazole pesticides and the metabolites by HPLC
Authors: Gao Jing , Qu Han , Zhang Chuntao , Li Weijia , Wang Peng , Zhou Zhiqiang 
Published: December 2016

AbstractThe enantiomeric separation of the enantiomers of three phenylpyrazole pesticides (fipronil, flufiprole, ethiprole) and two fipronil metabolites (amide‐fipronil and acid‐fipronil) were investigated by high‐performance liquid chromatography (HPLC) with a CHIRALPAK® IB chiral column. The mobile phase was n‐hexane or petroleum ether with 2‐propanol or ethanol as modifier at a flow rate of 1.0 mL/min. The influences of mobile phase composition and column temperature between 15 and 35°C on the separations were studied. All the analytes except ethiprole obtained complete enantiomeric separation after chromatographic condition optimization. Fipronil, flufiprole, amide‐fipronil, and acid‐fipronil obtained complete separation with the best resolution factors of 2.40, 3.40, 1.67, and 16.82, respectively, but ethiprole showed no enantioselectivity under the optimized conditions. In general, n‐hexane with 2‐propanol gave better separations in most cases. The results showed decreasing temperature and content of modifier in the mobile phase resulted in better separation and longer analysis time as well. The thermodynamic parameters calculated according to linear the Van't Hoff equation indicated the chiral separations in the study were enthalpy‐driven. Fipronil and its two chiral hydrolyzed metabolites obtained baseline separation simultaneously under optimized conditions.
WDPCP regulates the ciliogenesis of human sinonasal epithelial cells in chronic rhinosinusitis
Authors: Ma Yun , Sun Yueqi , Jiang Lijie , Zuo Kejun , Chen Hexin , Guo Jiebo , Chen Fenghong , Lai Yinyan , Shi Jianbo 
Published: December 2016

AbstractDamage to the mucociliary clearance system is a typical change in the pathogenesis in chronic rhinosinusitis. However, the mechanisms underlying cilia loss remain unclear. WDPCP is a key protein essential for ciliogenesis, and is also an effector of the planar cell polarity signaling system. In this study, we sought to determine the role of WDPCP in cilia loss in patients with chronic rhinosinusitis. We demonstrated the expression of WDPCP in human sinonasal epithelium from patients with chronic rhinosinusitis and control subjects. We also used air‐liquid interface to culture primary human sinonasal epithelial cells in‐vitro model and to investigate WDPCP function. We then explored links between rhinosinusitis, WDPCP and inflammation. Accompanied with cilia loss, expression of WDPCP in human sinonasal epithelium from patients with chronic rhinosinusitis was decreased significantly compared with control subjects. In vitro study, we found that WDPCP level increased at first, and then decreased. Inhibiting WDPCP expression could lead to the poor quantity and length of cilia with reduced expression of Septin7. Also, Th1 type inflammatory mediators could decrease the expression of WDPCP. In conclusion, inflammatory cytokines cause reduced WDPCP expression, which contributes to impaired ciliogenesis in human rhinosinusitis.
An entertainment‐education colorectal cancer screening decision aid for African American patients: A randomized controlled trial
Authors: Hoffman Aubri S. , Lowenstein Lisa M. , Kamath Geetanjali R. , Housten Ashley J. , Leal Viola B. , Linder Suzanne K. , Jibaja‐Weiss Maria L. , Raju Gottumukkala S. , Volk Robert J. 
Published: December 2016

BACKGROUNDColorectal cancer screening rates for African American patients remain suboptimal. Patient decision aids designed with an entertainment‐education approach have been shown to improve saliency and foster informed decision making. The purpose of this study was to assess whether an entertainment‐education decision aid tailored for African American patients improved patients' decision making, attitudes, intentions, or colorectal cancer screening behavior.METHODSEighty‐nine participants were randomized to view 1) a patient decision aid video containing culturally tailored information about colorectal cancer screening options and theory‐based support in decision making presented in an entertainment–education format or 2) an attention control video about hypertension that contained similarly detailed information. Participants met with their clinician and then completed follow‐up questionnaires assessing their knowledge, decisional conflict, self‐advocacy, attitudes, perceived social norms, and intentions. At 3 months, completion of screening was assessed by chart review.RESULTSViewing the culturally tailored decision aid significantly increased African American patients' knowledge of colorectal cancer screening recommendations and options. It also significantly reduced their decisional conflict and improved their self‐advocacy. No significant differences were observed in participants' attitudes, norms, or intentions. At three months, 23% of all patients had completed a colonoscopy.CONCLUSIONSDesigning targeted, engaging patient decision aids for groups that receive suboptimal screening holds promise for improving patient decision making and self‐advocacy. Additional research is warranted to investigate the effectiveness of such aids in clinical practices with suboptimal screening rates and on downstream behaviors (such as repeat testing). Cancer 2017;123:1401–1408. © 2016 American Cancer Society.
FNA biopsy of secondary nonlymphomatous malignancies in salivary glands: A multi‐institutional study of 184 cases
Authors: Wang He , Hoda Raza S. , Faquin William , Rossi Esther Diana , Hotchandani Nihar , Sun Tianlin , Pusztaszeri Marc , Bizzarro Tommaso , Bongiovanni Massimo , Patel Viren , Jhala Nirag , Fadda Guido , Gong Yun 
Published: December 2016

BACKGROUNDSecondary malignancies of salivary glands (SMSGs) are among the most common malignant neoplasms to involve the salivary glands. Fine‐needle aspiration biopsy (FNAB) of SMSG can present diagnostic challenges. The current report presents the largest such FNAB series to date.METHODSA search of the pathology database from 6 academic institutions identified 184 FNAB cases of nonlymphomatous SMSG.RESULTSOf the 184 cases, 171 were of the parotid glands, and 13 were of the submandibular glands; 130 patients were men, and 54 were women, and the mean patient age at diagnosis was 68 years. Metastatic squamous cell carcinoma (SCC) from all sites (n = 87) and melanoma (n = 67) constituted the majority of SMSGs. Less frequent SMSGs were comprised of metastatic carcinomas from distant organs (n = 16), including sites in the breast, lung, kidney, thyroid, pancreatobiliary, prostate, and bladder. Other uncommon SMSGs, including nasopharyngeal carcinoma (n = 3), sarcoma (n = 4), other metastatic skin‐derived carcinomas (n = 6), and metastatic chordoma (n = 1), also were observed. Ancillary tests were performed on 37 FNAB specimens (20.1%) to aid the evaluation. One hundred forty‐seven specimens (79.9%) had a definitive diagnosis with accurate tumor subtyping, 21 (11.4%) had a definitive malignant diagnosis but without specifying subtype, 9 (4.9%) had an indeterminate diagnosis, and 7 (3.8%) had a false‐negative diagnosis.CONCLUSIONSSMSGs originate predominately from the head and neck and are more common in older men. Overall, the FNAB diagnosis of SMSG is accurate, but diagnostic challenges can be encountered, especially in SCC types of SMSG. Ancillary studies are needed for the definitive diagnosis of challenging cases. Cancer Cytopathol 2017;125:91–103. © 2016 American Cancer Society.
Variable proopiomelanocortin expression in tanycytes of the adult rat hypothalamus and pituitary stalk
Authors: Wittmann Gábor , Farkas Erzsébet , Szilvásy‐Szabó Anett , Gereben Balázs , Fekete Csaba , Lechan Ronald M. 
Published: December 2016

ABSTRACTIt is generally believed that proopiomelanocortin (POMC) is expressed exclusively by neurons in the adult rodent brain. Unbeknownst to most researchers, however, Pomc in situ hybridization studies in the rat show specific labeling in the ventral wall of the hypothalamic third ventricle, which is formed by specialized ependymal cells, called tanycytes. Here we characterized this non‐neuronal POMC expression in detail using in situ hybridization and immunohistochemical techniques, and report two unique characteristics. First, POMC mRNA and precursor protein expression in non‐neuronal cells varies to a great degree as to the extent and abundance of expression. In brains with low‐level expression, POMC mRNA and protein was largely confined to a population of tanycytes within the infundibular stalk/caudal median eminence, termed here γ tanycytes, and a subset of closely located β and α2 tanycytes. In brains with high‐level expression, POMC mRNA and protein was observed in the vast majority of α2, β, and γ tanycytes. This variability was observed in both adult males and females; of 41 rats between 8 and 15 weeks of age, 17 had low‐, 9 intermediate‐, and 15 high‐level POMC expression in tanycytes. Second, unlike other known POMC‐expressing cells, tanycytes rarely contained detectable levels of adrenocorticotropin or α‐melanocyte–stimulating hormone. The results indicate either a dynamic spatiotemporal pattern whereby low and high POMC syntheses in tanycytes occur periodically in each brain, or marked interindividual differences that may persist throughout adulthood. Future studies are required to examine these possibilities and elucidate the physiologic importance of POMC in tanycytes. J. Comp. Neurol. 525:411–441, 2017. © 2016 Wiley Periodicals, Inc.
Organization of the antennal lobes in the praying mantis (Tenodera aridifolia)
Authors: Carle Thomas , Watanabe Hidehiro , Yamawaki Yoshifumi , Yokohari Fumio 
Published: December 2016

AbstractOlfaction in insects plays pivotal roles in searching for food and/or for sexual partners. Although many studies have focused on the olfactory processes of nonpredatory insect species, little is known about those in predatory insects. Here, we investigated the anatomical features of the primary olfactory center (antennal lobes) in an insect predator whose visual system is well developed, the praying mantis Tenodera aridifolia. Both sexes of T. aridifolia were found to possess 54 glomeruli, and each glomerulus was identified based on its location and size. Moreover, we found a sexual dimorphism in three glomeruli (macroglomeruli) located at the entrance of the antennal nerves, which are 15 times bigger in males than their homologs in females. We additionally deduced the target glomeruli of olfactory sensory neurons housed in cognate types of sensilla by degenerating the sensory afferents. The macroglomeruli received sensory inputs from grooved peg sensilla, which are present in a large number at the proximal part of the males' antennae. Furthermore, our findings suggest that glomeruli at the posteriodorsal part of the antennal lobes receive sensory information from putative hygro‐ and thermosensitive sensilla. The origins of projections connected to the protocerebrum are also discussed. J. Comp. Neurol. 525:1685–1706, 2017. © 2016 Wiley Periodicals, Inc.