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Fengrong Zheng, Hongzhan Liu, Meijing Jiang, Zongjun Xu, Zongxing Wang, Claire Wang, Fei Du, Zhen Shen, Bo Wang
The complete mitochondrial genome is greatly important for studies on genetic structure and phylogenetic relationship at various taxonomic levels. To obtain information about the evolutionary trends of mtDNA in the Ulvophyceae and also to gain insights into the phylogenetic relationships between ulvophytes and other chlorophytes, we determined the mtDNA sequence of Caulerpa lentillifera (sea grape) using de novo mitochondrial genome sequencing. The complete genomic DNA of C. lentillifera was circular and 209,034 bp in length, and it was the largest green-algal mitochondrial genome sequenced to date, with a low gene density of 65...
June 19, 2018: Gene
Cheng-Tao Li, Min Zhang, Yun-Xuan Weng, Jia-Xiang Qin
The difference of enzymatic degradation behavior between Poly (butylene succinate-co-diethylene glycol succinate) (PBS-co-DEGS) and Poly (butylene succinate-co-butylene diglycolic acid) (PBS-co-BDGA) was studied in a Tetrahydrofuran (THF)/toluene mixed system by Novozym 435 (N435, immobilized Candida Antarctica lipase supported on acrylic resin) catalysis for 30 h. These two copolymers (modified with alcoholic acid by ether linkage) were synthesized by melt polycondensation and characterized by 1 H NMR. The average molecular weight and thermal property before and after degradation were determined by gel permeation chromatography (GPC) and thermogravimetric analysis (TGA), respectively...
June 19, 2018: International Journal of Biological Macromolecules
Jan David, Zacharias Steinmetz, Jiri Kucerik, Gabriele Ellen Schaumann
The use of plastic materials in daily life, industry, and agriculture can cause soil pollution with plastic fragments down to the micrometer scale, i.e. microplastics. Quantitative assessment of microplastics in soil samples is so far limited. Until now, microplastics' analyses in soil require laborious sample cleanup and are mostly restricted to qualitative assessments. In this study, we applied thermogravimetry-mass spectrometry (TGA-MS) in order to develop a method for the direct quantitative analysis of polyethylene terephthalate (PET) without further sample pretreatment...
June 22, 2018: Analytical Chemistry
Dominik Suter, Luuk T C G van Summeren, Olivier Blacque, Koushik Venkatesan
C^C cyclometalated platinum(II) triplet emitters bearing electronically different N-heterocyclic carbenes-(1,3-diisopropyl-4-(trifluoromethyl)-imidazol-2-ylidene (d), 1,3-diisopropyl-benzimidazol-2-ylidene (e), and 1,3-diisopropyl-imidazol-2-ylidene (f))-as neutral ligands and biphenyl (bph) as well as its fluorinated derivative octafluorobiphenyl (oFbph) as dianionic cyclometalating ancillary ligand were synthesized and structurally characterized by 1 H, 13 C, 19 F, and 195 Pt NMR, single crystal X-ray diffraction, and HR-ESI-MS studies...
June 22, 2018: Inorganic Chemistry
Lei Niu, Jianlin Xu, Wenlong Yang, Jiqiang Ma, Jinqiang Zhao, Chenghu Kang, Jiaqiang Su
Nano-Sb₂O₃ has excellent synergistic flame-retardant effects. It can effectively improve the comprehensive physical and mechanical properties of composites, reduce the use of flame retardants, save resources, and protect the environment. In this work, nanocomposites specimens were prepared by the melt-blending method. The thermal stability, mechanical properties, and flame retardancy of a nano-Sb₂O₃⁻brominated epoxy resin (BEO)⁻poly(butylene terephthalate) (PBT) composite were analyzed, using TGA and differential scanning calorimetry (DSC), coupled with EDX analysis, tensile testing, cone calorimeter tests, as well as scanning electron microscopy (SEM) and flammability tests (limiting oxygen index (LOI), UL94)...
June 22, 2018: Materials
Kaan Yetilmezsoy, Emel Kocak, Havva Melda Akbin, Didem Özçimen
Sustainable uses of the struvite (magnesium ammonium phosphate hexahydrate, MgNH4 PO4 ·6H2 O, MAP) recovered from the synthetic wastewater, as a high-quality slow-release fertilizer for the growth of nine medicinal plants and a fire-retardant barrier on the flammability of cotton fabric and wooden plate, were explored in this study. The previous experimental results demonstrated that under the optimal conditions, about 98.7% of NH4 + -N (initial NH4 + -N = 1000 mg/L) could be effectively and successfully recovered from simulated wastewater in the form of MAP precipitate...
June 22, 2018: Environmental Technology
Isiaka A Lawal, Monsurat M Lawal, Samson O Akpotu, Mayowa A Azeez, Patrick Ndungu, Brenda Moodley
The adsorption of sulfamethoxazole (SMZ) and ketoprofen (KET) using carbon nanotubes (CNTs) and CNTs modified with ionic liquids (ILs) was investigated. Two ionic liquids (1-benzyl, 3-hexyl imidazolium, IL1 and 1-benzyl, 3-decahexyl imidazolium, IL2) were synthesized, and characterized by nuclear magnetic resonance (1 H and 13 C NMR) and high resolution-mass spectrometry (HR-MS). CNTs and modified CNTs were characterized using FT-IR, X-ray diffraction (XRD), surface area and porosity analysis, thermal gravimetric analysis (TGA), Zeta potential, Raman and scanning electron microscopy (SEM)...
June 18, 2018: Ecotoxicology and Environmental Safety
Silvio Curia, Antonino Biundo, Isabel Fischer, Verena Braunschmid, Georg M Gübitz, Joseph Stanzione
The utilization of wood-derived building blocks (xylochemicals) to replace fossil-based precursors is an attractive research subject of modern polymer science. Here, we demonstrate that bisguaiacol (BG), a lignin-derived bisphenol analogue, can be used to prepare bio-based polyesters with remarkable thermal properties. BG has been reacted with different activated diacids to investigate the effect of co-monomer structures on the physical properties of the products. Namely, derivatives of adipic acid, succinic acid and 2,5-furandicarboxylic acid were used...
June 20, 2018: ChemSusChem
Antonin Desmecht, Timothy Steenhaut, Florence Pennetreau, Sophie Hermans, Olivier Riant
Polyamidoamine (PAMAM) dendrimers were covalently immobilized on multi-walled carbon nanotubes (MWNT) via two 'grafting to' strategies. We demonstrate the existence of non-covalent interactions between the two components but outline the superiority of our two grafting approaches, namely xanthate and click chemistry. MWNT surfaces were functionalized with activated ester and propargylic moieties prior to their reaction with PAMAM or azido-PAMAM dendrimers, respectively. The grafting of PAMAM generations 0 to 3 was evaluated with X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA) and transmission electron microscopy (TEM)...
June 20, 2018: Chemistry: a European Journal
Hicham Oudghiri-Hassani, Souad Rakass, Mostafa Abboudi, Ahmed Mohmoud, Fahd Al Wadaani
Zinc molybdate (ZnMoO₄) was prepared by thermal decomposition of an oxalate complex under a controlled temperature of 500 °C. Analyses of the oxalate complex were carried out using Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). On the other hand, analyses of the synthesized zinc molybdate were carried out by X-ray diffraction (XRD), transmission electron microscopy (TEM), and Brunauer-Emmett-Teller technique (BET). The efficiency of the synthesized catalyst was tested with the reduction reaction of 3-nitrophenol (3-NP), and was also applied as a sorbent for methylene blue dye (MB) in aqueous solutions...
June 15, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Tornike Sologashvili, Laure Wannaz, Maurice Beghetti, Yacine Aggoun, René Prêtre, Patrick O Myers
OBJECTIVES: Ventricular retraining and arterial switch have been described in late-presenting transposition of the great arteries (TGA) in older infants who were unable to undergo neonatal arterial switch operation (ASO) and late survivors of atrial switch with systemic right ventricular dysfunction. There are little data available on patients presenting between these 2 groups. This study aims to review the early and mid-term outcomes of the management of late-presenting TGA with an unprepared left ventricle (LV) by a 2-stage arterial switch...
April 17, 2018: Interactive Cardiovascular and Thoracic Surgery
Matthew Cardinal, Constantino Kantaridis, Tong Zhu, Pengling Sun, Debra D Pittman, John E Murphy, Steven Arkin
BACKGROUND: Tissue factor pathway inhibitor (TFPI) is a protease inhibitor of tissue factor-activated coagulation factor VII (TF-FVIIa) complex and activated factor X (FXa). PF-06741086 is a monoclonal antibody that targets TFPI to increase clotting activity. OBJECTIVES: This study was a randomized, double-blind, sponsor-open, placebo-controlled, single intravenous (IV) or subcutaneous (SC) dose escalation study to evaluate the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of PF-06741086...
June 16, 2018: Journal of Thrombosis and Haemostasis: JTH
Gurpreet Kaur, Preeti Garg, Baljinder Kaur, Ganga Ram Chaudhary, Sandeep Kumar, Neeraj Dilbaghi, P A Hassan, Santosh L Gawali
Bovine serum albumin (BSA) is one of the most copious and significant blood proteins with dynamic structure. The understanding of the structural functionality of BSA and its interaction with metal ions is desired for various biological functions. Herein, three different metallosurfactants containing different transition metals and the same hydrophobic tail were engaged to investigate the structural transition of BSA. The metallosurfactants have been prepared by a combination of metal ions (M = Fe, Co and Ni) with cetylpyridinium chloride surfactant via the ligand insertion method and were characterized by elemental, FTIR, 1H-NMR, and thermogravimetric analysis (TGA)...
June 15, 2018: Soft Matter
Siegfried Eigler, Christian Halbig, Oliver Martin, Frank Hauke, Andreas Hirsch
Controlled covalent functionalization of graphene remains a challenging task due to the heterogeneous nature of materials. Functionalization approaches of graphene either lack in quantifying the degree of functionalization or they do not discriminate between covalent and non-covalent functionalization. Here, graphite is oxidized and exfoliated in a three-step procedure and subsequently reduced and functionalized by hexylation. While Raman spectroscopy is powerful to determine the degree of in-plane lattice defects (θLD) and functionalization (θFD), the method fails detecting introduced hexyl groups at a concentration of about 0...
June 14, 2018: Chemistry: a European Journal
Glenwood D Goss, Enriqueta Felip, Manuel Cobo, Shun Lu, Konstantinos Syrigos, Ki Hyeong Lee, Erdem Göker, Vassilis Georgoulias, Wei Li, Salih Guclu, Dolores Isla, Young Joo Min, Alessandro Morabito, Andrea Ardizzoni, Shirish M Gadgeel, Andrea Fülöp, Claudia Bühnemann, Neil Gibson, Nicole Krämer, Flavio Solca, Agnieszka Cseh, Eva Ehrnrooth, Jean-Charles Soria
Importance: Treatment choice for lung squamous cell carcinoma could be aided by identifying predictive biomarkers. Objective: To assess whether patient outcomes in the LUX-Lung 8 trial were associated with ERBB gene family member aberrations in tumor specimens. Design, Setting, and Participants: Ad hoc secondary analysis of the LUX-Lung 8 trial conducted at 183 centers in 23 countries from March 30, 2012, to January 30, 2014. Eligible patients had stage IIIB or IV lung squamous cell carcinoma with progressive disease after 4 or more cycles of platinum-based chemotherapy...
June 14, 2018: JAMA Oncology
Oishi Jana, Ganesan Mani
2,6-Bis(3,5-dimethylpyrazoylmethyl)-4-methylphenol LH was readily synthesized by the reaction between 2,6-bis[(dimethylamino)methyl]-4-methylphenol and 3,5-dimethylpyrazole. The X-ray structure of the trisodium complex of LH showed the benzene-like planar Na3 O3 ring with alternative shorter (2.181-2.185 Å) and longer (2.244-2.263 Å) bonds. The reaction of anionic ligand L with [PdCl2 (COD)] yielded three Pd(II) complexes: [Pd{OC6 H2 (CH2 PzMe2 )2 -2,6-Me-4-κ N, O}2 ] (1), [PdCl{μ-OC6 H2 (CH2 PzMe2 )2 -2,6-Me-4-κ N, O, N}]2 (2), and [PdCl2 {μ-OC6 H2 (CH2 PzMe2 )2 -2,6-Me-4-κ N, O, N}2 Pd] (3) (PzMe2 = 3,5-dimethylpyrazole)...
June 14, 2018: Inorganic Chemistry
Naga Sai Visweswar Kambhampati, Swayamsiddha Kar, Sai Siva Kumar Pinnepalli, Janardhana Chelli, Mukesh Doble
Betulinic acid (BA), a pentacyclic triterpenoid, is a very promising therapeutic drug with varied medicinal properties but it has low water solubility and consequentially low bioavailability. Cyclic β-(1 → 3),(1 → 6)-glucans (CBG), microbial cyclooligosaccharides produced by Bradyrhizobium japonicum ATCC 10324 having a cavity structure and good solubility in water have been tested for their ability to encapsulate betulinic acid and drug-binding interactions of CBG and BA were studied. First, in silico approach was employed to study the scope of any interaction between the CBG and BA...
May 28, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Dan Liu, Gang Li, Jiaxu Liu, Yue Wei, Hongchen Guo
Mesoporous TS-1 (MTS-1) containing organic templates tetrapropylammonium hydroxide (TPAOH) and polydiallyldimethylammonium chloride (PDDA) is synthesized and treated with different concentrations of hydrochloric acid aqueous solution. The as-synthesized MTS-1 are characterized using XRD, FT-IR, SEM, TEM, UV-Vis, 13C CP/MAS NMR, TGA, CO2-TPD, N2 adsorption-desorption, XRF and EA. The results of 13C CP/MAS NMR show that the structures of organic templates are retained after acid washing treatment. Not required to be removed by calcination, the organic templates embedding in MTS-1 can take the role of basic sites and activate carbon dioxide (CO2), which is confirmed by FT-IR...
June 13, 2018: ACS Applied Materials & Interfaces
Zhezhe Wang, Xinxin Xing, Yue Yang, Rongjun Zhao, Tong Zou, Zidong Wang, Yude Wang
Highly luminescent CdS quantum dots capped with thioglycolic acid (TGA@CdS QDs) were synthesized from cadmium chloride and thiourea as cadmium and sulfur sources via simple hydrothermal method. The room temperature photoluminescence (RTPL) properties of TGA@CdS QDs were investigated. The results indicate that the polarity of the solvent and the surface trap state resulted in the broadness Stokes shift between the maximum absorption wavelength and the emission wavelength of TGA@CdS QDs. The Co2+ sensing properties of fluorescence determination were investigated using TGA@CdS QDs...
June 12, 2018: Scientific Reports
Jianjun Li, Yongzhen Wu, Chunjie Yang, Ruifeng Zhu, Kai Zhao
This work was devoted to the synthesis and performance report of an optical sensing platform for dipicolinate (DPA), which was known as a biomarker for Bacillus anthracis spores. This DPA optical sensing platform (denoted as EuBTC@RB) was composed of luminescent rare earth MOF and rhodamine-derived sensing probe. Its structure was discussed and confirmed by means of XRD, IR, TGA, absorption, emission and excitation spectra. EuBTC@RB showed two sensing channels for DPA, including colorimetric sensing and ratiometric fluorescent sensing...
June 2, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
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