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Shuai Liu, Pingxiao Wu, Meiqing Chen, Langfeng Yu, Chunxi Kang, Nengwu Zhu, Zhi Dang
Three novel organic vermiculites (VER) modified by amphoteric surfactants (BS, SB and PBS) with different negatively charged groups (carboxylate, sulfonate and phosphate) were demonstrated and used for removal of bisphenol A (BPA) and tetrabromobisphenol A (TBBPA). The difference in the structure and surface properties of modified vermiculites were investigated using a series of characterization methods. BS and SB surfactant mainly adsorbed on the surface and hard to intercalate into the interlayer of VER, while both adsorption and intercalation occurred in PBS modification...
May 25, 2017: Environmental Pollution
Dawood Elhamifar, Parisa Mofatehnia, Masood Faal
A novel magnetic iron oxide supported copper/Schiff-base complex (Cu/SB-Fe3O4) was prepared, characterized and applied as effective nanocatalyst for the synthesis of biologically active 3,4-dihydropyrimidinones. The Cu/SB-Fe3O4 was prepared by chemical attachment of Schiff-base groups on Fe3O4/SiO2 nanoparticles followed by treatment with copper salt under mild conditions. This was characterized with several techniques such as VSM, TGA, EDX, FTIR, TEM and SEM. The Cu/SB-Fe3O4 nanocatalyst was successfully applied in the Biginelli reaction and gave corresponding biologically active 3,4-dihydropyrimidinones in high yield...
May 18, 2017: Journal of Colloid and Interface Science
Nina Bilandžić, Ivana Tlak Gajger, Marina Kosanović, Bruno Čalopek, Marija Sedak, Božica Solomun Kolanović, Ivana Varenina, Đurđica Božić Luburić, Ines Varga, Maja Đokić
The concentrations of 24 elements in seven honey types (multifloral, heather, common heather, bearberry, sage, mandarin orange-blossom and honeydew) collected in southern Mediterranean regions of Croatia were determined using ICP-MS. Significant differences were found in the concentrations of Ag, As, Ba, Cu, Co, Fe, K, Mg, Mn, Mo, Na, Ni, Se, Sb, U and Th (p<0.05, all) among honeys. The highest element concentrations were determined in honeydew honeys, with the exception of multifloral (Ca, Cr, Mo, Se), common heather (Mg, Na), bearberry (Ba, Fe, Pb) and sage (Ag) honeys...
November 1, 2017: Food Chemistry
Elio Padoan, Chiara Romè, Franco Ajmone-Marsan
Road dust (RD), together with surface soils, is recognized as one of the main sinks of pollutants in urban environments. Over the last years, many studies have focused on total and bioaccessible concentrations while few have assessed the bioaccessibility of size-fractionated elements in RD. Therefore, the distribution and bioaccessibility of Fe, Mn, Cd, Cr, Cu, Ni, Pb, Sb and Zn in size fractions of RD and roadside soils (<2.5μm, 2.5-10μm and 10-200μm) have been studied using aqua regia extraction and the Simple Bioaccessibility Extraction Test...
May 24, 2017: Science of the Total Environment
J B Koedijk, J van Rijswijk, W A Oranje, J P van den Bergh, S P Bours, H H Savelberg, N C Schaper
Sedentary behaviour (SB) is increasing in Western societies and some studies suggest a deleterious effect of SB on bone. The aim of this systematic review was to examine the association between SB and bone health in children, adolescents and young adults. Electronic databases (PubMed, MEDLINE, PsycINFO and Science Citation Index) were searched for relevant articles up to January 9, 2017. Studies were included when results on bone health (e.g. strength, mass and structure) and either subjectively (questionnaires) or objectively (accelerometry) measured SB were reported in healthy participants ≤24 years...
May 26, 2017: Osteoporosis International
Li Tian, Xiao-Qiu Zhou, Wei-Dan Jiang, Yang Liu, Pei Wu, Jun Jiang, Sheng-Yao Kuang, Ling Tang, Wu-Neng Tang, Yong-An Zhang, Fei Xie, Lin Feng
The present study evaluated the effect of dietary sodium butyrate (SB) supplementation on the growth and immune function in the proximal intestine (PI), middle intestine (MI) and distal intestine (DI) of young grass carp (Ctenopharyngodon idella). The fish were fed one powdery sodium butyrate (PSB) diet (1000.0 mg kg(-1) diet) and five graded levels of microencapsulated sodium butyrate (MSB) diets: 0.0 (control), 500.0, 1000.0, 1500.0 and 2000.0 mg kg(-1) diet for 60 days. Subsequently, a challenge test was conducted by injection of Aeromonas hydrophila...
May 22, 2017: Fish & Shellfish Immunology
Bo Gao, Wei Chen, Dan Shen, Saisai Wang, Cai Chen, Li Zhang, Wei Wang, Xiaoyan Wang, Chengyi Song
We report the comprehensive analysis of Tc1/mariner transposons in six species of neoteleost (cod, tetraodon, fugu, medaka, stickleback, and tilapia) for which draft sequences are available. In total, 33 Tc1/mariner families were identified in these neoteleost genomes, with 3-7 families in each species. Thirty of these are in full length and designed as autonomous families, and were classified into the DD34E (Tc1) and DD×D (pogo) groups. The DD34E (Tc1) group was further classified into five clusters (Passport-like, SB-like, Frog Prince-like, Minos-like, and Bari-like)...
May 22, 2017: Marine Genomics
Larry K Brown, Laura Whiteley, Christopher D Houck, Lacey K Craker, Ashley Lowery, Nancy Beausoleil, Geri Donenberg
OBJECTIVE: Adolescents in alternative schools for behavioral and emotional problems have an earlier sexual onset and higher rates of sexual risk than their peers. They also often have difficulty managing strong emotions, which can impair sexual decision making. Human immunodeficiency virus (HIV) prevention programs for these adolescents may be most effective if skills for coping with strong emotions during sexual situations are included. METHOD: This article reports the 6-month outcomes of a three-arm randomized controlled trial comparing an HIV prevention intervention with affect management (AM) to a standard, skills-based HIV prevention intervention (SB), and a general health promotion intervention (HP)...
June 2017: Journal of the American Academy of Child and Adolescent Psychiatry
Raquel Cardoso Machado, Clarice Dias Britto do Amaral, Joaquim de Araújo Nóbrega, Ana Rita Araujo Nogueira
A microwave-induced plasma optical emission spectrometer with N2-based plasma was combined with multimode sample introduction system (MSIS) for hydride generation (HG) and multielemental determination of As, Bi, Ge, Sb and Sn in samples of forage, bovine liver, powered milk, agricultural gypsum, rice and mineral fertilizer, using a single condition of pre-reduction and reduction. The accuracy of the developed analytical method was evaluated using certified reference materials of water and mineral fertilizer and recoveries ranged from 95 to 106%...
May 26, 2017: Journal of Agricultural and Food Chemistry
Maren Rasmussen, Christian Näther, Jan van Leusen, Paul Kögerler, Lyuben Zhechkov, Thoma Heine, Wolfgang Bensch
The formation of [{Co(II)(teta)2}{Co(II)2(tren)(teta)2}V(IV)15Sb(III)6O42(H2O)]·ca.9H2O [teta = triethylenetetraamine; tren = tris(2-aminoethyl)amine] illustrates a strategy toward reducing the molecular charge of polyoxovanadates, a key challenge in their use as components in single-molecule electronics. Here, a V-O-Co bond to a binuclear Co(2+)-centered complex and a Sb-N bond to the terminal N atom of a teta ligand of a mononuclear Co(2+) complex allow for full charge compensation of the archetypal molecular magnet [V15Sb6O42(H2O)](6-)...
May 25, 2017: Inorganic Chemistry
Marja H Leppänen, Pontus Henriksson, Christine Delisle Nyström, Hanna Henriksson, Francisco B Ortega, Jeremy Pomeroy, Jonatan R Ruiz, Cristina Cadenas-Sanchez, Marie Löf
PURPOSE: To investigate longitudinal associations of objectively-measured physical activity (PA) and sedentary behavior (SB) with body composition and physical fitness at a 12-month follow-up in healthy Swedish 4-year-old children. METHODS: The data from the population-based MINISTOP trial were collected between 2014-2016, and this study included the 138 children who were in the control group. PA and SB were assessed using the wrist-worn ActiGraph (wGT3x-BT) accelerometer during seven 24-hour periods, and subsequently, defined as SB, light-intensity PA (LPA), moderate-intensity PA (MPA), vigorous-intensity PA (VPA), and moderate-to-vigorous PA (MVPA)...
May 20, 2017: Medicine and Science in Sports and Exercise
Martin Hjort, Peter Kratzer, Sebastian Lehmann, Sahil J Patel, Kimberly A Dick, Chris J Palmstrom, Rainer Timm, Anders Mikkelsen
We study the surface diffusion and alloying of Sb into GaAs nanowires (NWs) with controlled axial stacking of wurtzite (Wz) and zinc blende (Zb) crystal phases. Using atomically resolved scanning tunneling microscopy, we find that Sb preferentially incorporates into the surface layer of the {110}-terminated Zb segments rather than the {112 ̅0}-terminated Wz segments. Density functional theory calculations verify the higher surface incorporation rate into the Zb phase and find that it is related to differences in the energy barrier of the Sb-for-As exchange reaction on the two surfaces...
May 24, 2017: Nano Letters
Ai-Xia Zhang, Jiang-Tao Liu, San-Dong Guo, Hui-Chao Li
Strain engineering is a very effective method to continuously tune the electronic, topological, optical and thermoelectric properties of materials. In this work, strain-dependent phonon transport of recently-fabricated antimonene (Sb monolayers) under biaxial strain is investigated using a combination of first-principles calculations and the linearized phonon Boltzmann equation within the single-mode relaxation time approximation (RTA). It is found that the ZA dispersion of antimonene with strain less than -1% gives imaginary frequencies, which suggests that compressive strain can induce structural instability...
May 24, 2017: Physical Chemistry Chemical Physics: PCCP
Neeraj Kumar, Kishore Kumar Krishnani, Narendra Pratap Singh
The concentrations of 14 metals, namely, chromium (Cr), manganese (Mn), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), selenium (Se), arsenic (As), strontium (Sr), cadmium (Cd), tin (Sn), antimony (Sb), mercury, (Hg), and lead (Pb), have been studied in freshwater mollusk Lamellidens marginalis collected from Dhimbe reservoir. In addition, also studied the cellular and antioxidative status to assess metal contamination as pollution biomarkers. The levels of all the 14 metals were elevated in different sampling sites of Dhimbe reservoir...
May 24, 2017: Environmental Science and Pollution Research International
S Aznar, M T Lara, A Queralt, J Molina-Garcia
Purpose. To evaluate children's psychosocial and environmental factors associated with sedentary behavior (SB). Method. The study involved a total of 420 children (mean 9.2 years; 52.9% girls) from the community of Madrid, Spain. SB and physical activity (PA) were objectively measured using accelerometers. TV viewing and potential correlates were assessed by questionnaire. Mixed-model regression analysis, adjusted for clustering within school locations, evaluated the relation of each independent variable with SBs...
2017: BioMed Research International
Wanhui Lin, Wenli Huang, Shenggen Chen, Mingxing Lin, Qingyu Huang, Huapin Huang
OBJECTIVE: Our primary objective is to verify whether 5-HTR6 is involved in the development of mossy fiber sprouting (MFS), and to determine how the progression of MFS is affected by 5-HTR6. METHODS: A total of 90 male adult Sprague-Dawley rats were allocated into either the control group (n=36) or the epileptic group (n=54). Status epilepticus (SE) of rats was induced by the intraperitoneal (i.p.) injection of LiCl-pilocarpine. We conducted our experiments in two stages...
May 25, 2017: Cellular Physiology and Biochemistry
Manuel Toledano, Raquel Osorio, Estrella Osorio, Inmaculada Cabello, Manuel Toledano-Osorio, Fátima S Aguilera
The aim of this study was to ascertain the effect of Zn-doping of dental adhesives and mechanical load cycling on the micromorphology of the resin-dentin interdiffusion zone (of sound and caries affected dentin). The investigation considered two different Zn-doped adhesive approaches and evaluated the interface using a doubled dye fluorescent technique and a calcium chelator fluorophore under a confocal laser scanning microscopy. Sound and carious dentin-resin interfaces of unloaded specimens were deficiently resin-hybridized, in general...
May 19, 2017: Journal of the Mechanical Behavior of Biomedical Materials
Thibault Alphazan, Adrian Diaz Alvarez, Francois Martin, Helen Grampeix, Virginie Enyedi, Eugenie Martinez, Névine Rochat, Marc Veillerot, Marc Dewitte, Jean-Philippe Nys, Maxime Berthe, Didier Stiévenard, Chloé Thieuleux, Bruno Grandidier
Functionalization of Ge surfaces with the aim of incorporating specific dopant atoms to form high quality junctions is of particular importance for the future generation of solid state devices. We report the shallow doping of Ge wafers with a monolayer doping strategy that is based on the controlled grafting of Sb-precursors and the subsequent diffusion of Sb into the wafer upon annealing. We highlight the key role of citric acid to passivate the surface prior to its reaction with the Sb-precursors and the benefit of a protective SiO2 overlayer that enables the efficient incorporation of Sb dopants with a concentration higher than 1020 cm-3...
May 23, 2017: ACS Applied Materials & Interfaces
Sujin Yun, Michelle Wennerholm, Jonathan E Shelton, Pascal Bonaventure, Michael A Letavic, Brock T Shireman, Timothy W Lovenberg, Christine Dugovic
Orexins peptides exert a prominent role in arousal-related processes including stress responding, by activating orexin-1 (OX1R) and orexin-2 (OX2R) receptors located widely throughout the brain. Stress or orexin administration stimulates hyperarousal, adrenocorticotropic hormone (ACTH) and corticosterone release, and selective OX1R blockade can attenuate several stress-induced behavioral and cardiovascular responses but not the hypothalamic-pituitary-adrenal (HPA) axis activation. As opposed to OX1R, OX2R are preferentially expressed in the paraventricular hypothalamic nucleus which is involved in the HPA axis regulation...
2017: Frontiers in Behavioral Neuroscience
Asier Mañas, Borja Del Pozo-Cruz, Francisco José García-García, Amelia Guadalupe-Grau, Ignacio Ara
Sedentary behaviour (SB) has recently emerged as an independent risk factor for different health outcomes. Older adults accumulate long time in SB. Understanding the role that SB plays on health is crucial for a successful aging. This short systematic review summarizes the current evidence related to the effects of objectively measured SB on frailty, physical performance and mortality in adults ≥60 years old. The literature search produced 271 records for physical performance (n = 119), frailty (n = 31), and mortality (n = 121)...
May 22, 2017: European Journal of Sport Science
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