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https://www.readbyqxmd.com/read/28222487/pyrrole-derivatives-and-diterpene-alkaloids-from-the-south-china-sea-sponge-agelas-nakamurai
#1
Mei-Jun Chu, Xu-Li Tang, Guo-Fei Qin, Yan-Ting Sun, Lei Li, Nicole J de Voogd, Ping-Lin Li, Guo-Qiang Li
Two pairs of new non-brominated racematic pyrrole derivatives, (±)-nakamurine D (1) and (±)-nakamurine E (2), two new diterpene alkaloids, iso-agelasine C (16), and iso-agelasidine B (21), together with fifteen known pyrrole derivatives((±)-3 - 15), five known diterpene alkaloids (17 - 20, 22) were isolated from the South China Sea sponge Agelas nakamurai. The racemic mixtures, compounds 1 - 4, were resolved into four pairs of enantiomers, (+)-1 and (-)-1, (+)-2 and (-)-2, (+)-3 and (-)-3, and (+)-4 and (-)-4, by chiral HPLC...
February 21, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28222304/fabrication-of-novel-visible-light-driven-agi-g-c3n4-composites-with-enhanced-visible-light-photocatalytic-activity-for-diclofenac-degradation
#2
Wei Zhang, Li Zhou, Jun Shi, Huiping Deng
A visible-light-driven heterostructured AgI/g-C3N4 was prepared by a deposition-precipitation method. The composition, structure, morphology, and optical properties of the photocatalyst were characterized by Brunauer-Emmett-Teller method (BET), X-ray powder diffraction (XRD), Fourier transform-infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), scanning electron microscope (SEM), UV-vis diffused reflectance spectroscopy (DRS), photoluminescence spectroscopy (PL), photocurrent, and electrochemical impedance spectroscopy (EIS), respectively...
February 14, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28222303/organic-dye-removal-from-aqueous-solutions-by-hierarchical-calcined-ni-fe-layered-double-hydroxide-isotherm-kinetic-and-mechanism-studies
#3
Chunsheng Lei, Meng Pi, Panyong Kuang, Yingqing Guo, Fenge Zhang
Hierarchically porous nickel-iron-layered double hydroxide (NiFe-LDH) with a Ni(2+)/Fe(3+) molar ratio of 3 was successfully synthesised through a simple hydrothermal route. After calcination at 400°C, NiFe-LDH transformed into nickel-iron-layered double oxides (NiFe-LDO). The as-prepared samples were characterised through X-ray powder diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and nitrogen adsorption...
February 14, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28222209/effect-of-different-intermediary-bases-on-microleakage-of-a-restorative-material-in-class-ii-box-cavities-of-primary-teeth
#4
Faika Y Abdelmegid, Fouad S Salama, Waleed M Al-Mutairi, Saud K Al-Mutairi, Sultan O Baghazal
INTRODUCTION: The aim of this in vitro study was to assess and compare the effect of different intermediary bases on microleakage between tooth and a nanocomposite interface in Class II box cavities in primary teeth. METHODS: Standard Class II box cavities were prepared in 52 primary molars and randomly divided into 9 groups according to the intermediary base used (Multicore Flow, Fuji II LC, SDR, Smart Dentin Replacement, and Biodentine). All specimens were subjected to thermocycling and prepared for microleakage testing and evaluation...
February 21, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28222156/toothbrush-abrasivity-in-a-long-term-simulation-on-human-dentin-depends-on-brushing-mode-and-bristle-arrangement
#5
Mozhgan Bizhang, Ilka Schmidt, Yong-Hee Patricia Chun, Wolfgang H Arnold, Stefan Zimmer
OBJECTIVE: The aim of this study was to evaluate the susceptibility of dentin to brushing abrasion using four different toothbrushes (rotating-oscillating, sonic and two types of manual toothbrushes) with the same brushing forces. METHODS: Dentin samples (n = 72) were selected from 72 impacted third molars. Half of the surface of dentin samples was covered with an adhesive tape, creating a protected and a freely exposed area in the same specimen. Brushing was performed with either a: sonic (Sonicare PowerUp, Philips GmbH, Hamburg, Germany), b: oscillating-rotating (Oral B Vitality Precisions Clean, Procter & Gamble, Schwalbach am Taunus, Germany) or two different manual toothbrushes c: flat trim brush head toothbrush (Dr...
2017: PloS One
https://www.readbyqxmd.com/read/28221389/optical-electrical-and-magnetic-properties-of-lanthanum-strontium-manganite-la1-xsrxmno3-synthesized-through-the-citrate-combustion-method
#6
Ali Omar Turky, Mohamed Mohamed Rashad, Ali Mostafa Hassan, Elsayed M Elnaggar, Mikhael Bechelany
Generally, strontium-doped lanthanum manganites (LSM) are materials connected ordinarily as cathodes in the solid oxide fuel cell (SOFC). In this study, the structural, optical, electrical and magnetic properties of La1-xSrxMnO3 (x = 0.2, 0.5, 0.8) synthesized using an organic acid precursor strategy were investigated, based on using citric acid as a fuel. Evidently, the results disclosed that a pure single monoclinic LSM phase was obtained from the thermally treated precursors annealed at 1000 °C with an annealing time of 2 h...
February 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28221383/influence-of-surface-states-and-size-effects-on-the-seebeck-coefficient-and-electrical-resistance-of-bi1-xsbx-nanowire-arrays
#7
M Cassinelli, S Müller, K-O Voss, C Trautmann, F Völklein, J Gooth, K Nielsch, M E Toimil-Molares
The Seebeck coefficient and electrical resistance of Bi1-xSbx nanowire arrays electrodeposited in etched ion-track membranes have been investigated as a function of wire diameter (40-750 nm) and composition (0 ≤ x ≤ 1). The experimental data reveal a non-monotonic dependence between thermopower and wire diameter for three different compositions. Thus, the thermopower values decrease with decreasing wire diameter, exhibiting a minimum around ∼60 nm. This non-monotonic dependence of the Seebeck coefficient is attributed to the interplay of surface and bulk states...
February 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/28221363/premature-primary-tooth-eruption-in-cognitive-motor-delayed-adnp-mutated-children
#8
I Gozes, A Van Dijck, G Hacohen-Kleiman, I Grigg, G Karmon, E Giladi, M Eger, Y Gabet, M Pasmanik-Chor, E Cappuyns, O Elpeleg, R F Kooy, S Bedrosian-Sermone
A major flaw in autism spectrum disorder (ASD) management is late diagnosis. Activity-dependent neuroprotective protein (ADNP) is a most frequent de novo mutated ASD-related gene. Functionally, ADNP protects nerve cells against electrical blockade. In mice, complete Adnp deficiency results in dysregulation of over 400 genes and failure to form a brain. Adnp haploinsufficiency results in cognitive and social deficiencies coupled to sex- and age-dependent deficits in the key microtubule and ion channel pathways...
February 21, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28220703/whole-cell-biocatalytic-synthesis-of-cinnamyl-acetate-with-a-novel-esterase-from-the-dna-library-of-acinetobacter-haemolyticus
#9
Hao Dong, Francesco Secundo, Changhu Xue, Xiangzhao Mao
Cinnamyl acetate has a wide application in the flavor and fragrance industry because of its sweet, balsamic and floral odor. Up to now, lipases have been mainly used in enzyme-mediated synthesis of cinnamyl acetate, while esterases are only used in a few cases. Moreover, the use of purified enzymes is often a disadvantage which leads to increases of the production costs. In this paper, a genomic DNA library of Acinetobacter haemolyticus was constructed, and a novel esterase (EstK1) was identified. After expressed in E...
February 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28220366/zirconia-implants-and-peek-restorations-for-the-replacement-of-upper-molars
#10
José María Parmigiani-Izquierdo, María Eugenia Cabaña-Muñoz, José Joaquín Merino, Arturo Sánchez-Pérez
BACKGROUND: One of the disadvantages of the zirconia implants is the lack of elasticity, which is increased with the use of ceramic or zirconia crowns. The consequences that could result from this lack of elasticity have led to the search for new materials with improved mechanical properties. CASE PRESENTATION: A patient who is a 45-year-old woman, non-smoker and has no medical record of interest with a longitudinal fracture in the palatal root of molar tooth 1...
December 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/28220259/mutations-in-kiaa0753-cause-joubert-syndrome-associated-with-growth-hormone-deficiency
#11
Joshi Stephen, Thierry Vilboux, Luhe Mian, Chulaluck Kuptanon, Courtney M Sinclair, Deniz Yildirimli, Dawn M Maynard, Joy Bryant, Roxanne Fischer, Meghana Vemulapalli, James C Mullikin, Marjan Huizing, William A Gahl, May Christine V Malicdan, Meral Gunay-Aygun
Joubert syndrome and related disorders (JSRD) are a heterogeneous group of ciliopathies defined based on the mid-hindbrain abnormalities that result in the characteristic "molar tooth sign" on brain imaging. The core clinical findings of JSRD are hypotonia, developmental delay, abnormal eye movements and breathing abnormalities. To date, more than 30 JSRD genes that encode proteins important for structure and/or function of cilia have been identified. Here, we present 2 siblings with Joubert syndrome associated with growth hormone deficiency...
February 20, 2017: Human Genetics
https://www.readbyqxmd.com/read/28219630/early-complications-from-the-use-of-calcium-phosphate-paste-in-mandibular-lengthening-surgery-a-retrospective-study
#12
Erica Coppey, Maurice Y Mommaerts
PURPOSE: Calcium phosphate paste is used in mandibular lengthening surgery to avoid unesthetic notching at the lower border and to help stabilize the segments when osteosynthesis slippage is a concern. The aim of this study was to investigate whether the hardened paste increases the incidence of infections. MATERIALS AND METHODS: This was a retrospective cohort study of medical charts of all patients who underwent a bilateral sagittal split osteotomy from February 2012 through July 2015...
January 26, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28219629/contrasting-patterns-for-missing-third-molars-in-the-united-states-and-sweden
#13
Caitlin B L Magraw, Lars Pallesen, Kevin L Moss, Elda L Fisher, Steven Offenbacher, Raymond P White
PURPOSE: The purpose of this study was to compare the prevalence of third molars from the US National Health and Nutrition Examination Survey (NHANES) and the Swedish survey. MATERIALS AND METHODS: This cross-sectional study involved the comparison of the only published data on third molar prevalence. The number of visible third molars in the NHANES of 2011 through 2012 were assessed in nonclinical settings by trained, calibrated dental hygienists and reported by age decade (approximately 5,000 patients)...
January 30, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28219467/comparative-fibre-degrading-capacity-in-foals-at-immediate-and-late-post-weaning-periods
#14
C Faubladier, V Julliand, L Beuneiche, C Philippeau
Total tract apparent digestibility of dietary fibrous components and parameters of the faecal digestive ecosystem were compared at immediate and late post-weaning periods using five foals. The foals were abruptly weaned (day 0) from their mares at 6 months of age. Immediately (day 0 to day 14) and later (day 131 to day 194) after weaning, foals received the same basal diet consisting of hay and pellets. Pellets were fed at 0.36% BW. Hay was offered ad libitum and corresponded to 120% of the average voluntary hay intake measured individually during the immediate (days 1 to 4) and late (days 180 to 183) post-weaning periods...
February 21, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28218520/alteration-of-the-copper-binding-capacity-of-iron-rich-humic-colloids-during-transport-from-peatland-to-marine-waters
#15
Francois Muller, Marco Cuscov
Blanket bogs contain vast amounts of Sphagnum-derived organic substances which can act as powerful chelators for dissolved iron and thus enhance its export to the coastal ocean. To investigate the variations in quantity and quality of these exports, adsorptive cathodic stripping voltammetry (CSV) was used to characterise the metal binding properties of molecular weight-fractionated dissolved organic matter (MW-fractionated DOM) in the catchment and coastal plume of a small peat-draining river over a seasonal cycle...
February 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28218399/smooth-operator-the-effects-of-different-3d-mesh-retriangulation-protocols-on-the-computation-of-dirichlet-normal-energy
#16
Jackson P Spradley, James D Pampush, Paul E Morse, Richard F Kay
OBJECTIVES: Dirichlet normal energy (DNE) is a metric of surface topography that has been used to evaluate the relationship between the surface complexity of primate cheek teeth and dietary categories. This study examines the effects of different 3D mesh retriangulation protocols on DNE. We examine how different protocols influence the DNE of a simple geometric shape-a hemisphere-to gain a more thorough understanding than can be achieved by investigating a complex biological surface such as a tooth crown...
February 20, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28218223/comparison-of-different-periodontal-healing-of-critical-size-noncontained-and-contained-intrabony-defects-in-beagles
#17
Sheng-Qi Zang, Shuai Kang, Xin Hu, Meng Wang, Xin-Wen Wang, Tao Zhou, Qin-Tao Wang
BACKGROUND: Regenerative techniques help promote the formation of new attachment and bone filling in periodontal defects. However, the dimensions of intraosseous defects are a key determinant of periodontal regeneration outcomes. In this study, we evaluated the efficacy of use of anorganic bovine bone (ABB) graft in combination with collagen membrane (CM), to facilitate healing of noncontained (1-wall) and contained (3-wall) critical size periodontal defects. METHODS: The study began on March 2013, and was completed on May 2014...
2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28217540/correlating-the-clinical-assessment-of-impacted-mandibular-third-molars-with-panoramic-radiograph-and-intraoral-periapical-radiograph
#18
P Vani Priya, Fazil A Nasyam, M Ramprasad, Narendra V Penumatsa, Syed Akifuddin, Sandeep
AIMS AND OBJECTIVES: This study was conducted to compare the clinical assessment of impacted third molars of mandible with panaromic radiograph (OPG) and intraoral periapical radiograph (IOPA) and to assess the efficacy of IOPA and. Moreover, we corroborated the OPG and IOPA findings of impacted mandiblar third molar root apex to inferior alveolar canal. MATERIALS AND METHODS: A total of 200 patients with pericoronitis were examined who were indicated for surgical extraction, among which 50 patients were selected for the study...
December 2016: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28217537/effect-of-proteolytic-enzyme-bromelain-on-pain-and-swelling-after-removal-of-third-molars
#19
Tejpal Singh, Vinayak More, Umayra Fatima, Tanveer Karpe, Mohammed A Aleem, J Prameela
AIMS AND OBJECTIVES: To evaluate the effect of bromelain on pain and swelling after surgical removal of third molars. MATERIALS AND METHODS: A prospective randomized clinical study was conducted among 40 patients requiring surgical removal of impacted mandibular third molars. All the impacted molars were surgically removed, and the patients were administered bromelain along with amoxicillin. Patients were recalled on day 1, day 3, and day 7 for postoperative pain assessment using visual analogue scale (VAS) and postoperative swelling assessment using facial reference points tragus and pogonion...
December 2016: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28217347/crystal-structure-of-e-4-hy-droxy-6-methyl-3-1-2-4-nitro-phen-yl-hydrazinyl-idene-eth-yl-2h-pyran-2-one
#20
Kirandeep, Ahmad Husain, Pooja Negi, Girijesh Kumar, Ramesh Kataria
The title compound, C14H13N3O5 (HMNP), was synthesized by the simple condensation of p-nitro-phenyl-hydrazine with de-hydro-acetic acid (DHA) in a 1:1 molar ratio in ethanol. HMNP has been characterized by using FT-IR, (1)H and (13)C NMR and UV-Vis spectroscopic and single-crystal X-ray diffraction techniques. The crystal packing reveals strong hydrogen bonds between the NH group and the carbonyl O atom of di-hydro-pyran-one moiety, forming chains along [101]. The thermal stability of the synthesized compound was confirmed by thermogravimetric analysis and it was found to be stable up to 513 K...
February 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
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