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Zhan Zhou, Yuhui Zheng, Cheng Cheng Zhang, Jinwei Gao, Yiping Tang, Qianming Wang
Carbonaceous materials have long been developed to utilize "nano-spaces" and numerous guest species could be encapsulated. A remarkable fluorescence difference has been observed after newly designed pyropheophorbide-a-appended carbon nanohorns were incorporated in a cellular medium and confocal microscopy was employed for the determination of the intracellular localization. Our study supported the role of carbon nanohorns as carriers of photodynamic therapy (PDT) agents and their heating behavior was discussed...
August 16, 2018: Photochemical & Photobiological Sciences
Shixiang Yao, Chibuike C Udenigwe
Post-translational modifications (PTMs) often occur in proteins and play a regulatory role in protein function. There is an increasing interest in the bioactivity of food protein-derived peptides, but the occurrence of PTMs and their influence on food peptide structure and behaviour remain largely unknown. In this study, the shotgun-based peptidomics strategy was used to identify the occurrence of PTMs in peptides generated from potato protein hydrolysis using digestive proteases. Diverse PTMs were found in the potato peptides, including acetylation of lysine, N-terminal of proteins and peptides, C-terminal amidation, de-amidation of asparagine/glutamine, methylation and trimethylation, methionine oxidation and N-terminal pyro-glutamyl residue formation...
July 2018: Royal Society Open Science
Gabriela P F Arrifano, Rosa C R Martín-Doimeadios, María Jiménez-Moreno, Sergio Fernández-Trujillo, Marcus Augusto-Oliveira, José R Souza-Monteiro, Barbarella M Macchi, Jacqueline I Alvarez-Leite, José L M do Nascimento, Marcos T Amador, Sidney Santos, Ândrea Ribeiro-Dos-Santos, Liz C Silva-Pereira, Reinaldo B Oriá, Maria E Crespo-Lopez
Human exposure to mercury is a serious problem of public health in Amazon. As in other vulnerable populations throughout the world, Amazonian riverine populations are chronically exposed to this metal and some symptoms of mercury intoxication were already detected in these populations. However, studies on the genetic susceptibility to mercury toxicity in the Amazon are scarce, and they tested a limited number of individuals. In this context, apolipoprotein E gene ( APOE ) is a key element with a well-established association among their alleles and the neurodegenerative consequences of mercury intoxication...
2018: Frontiers in Genetics
Christian Bonhomme, Xiaoling Wang, Ivan Hung, Zhehong Gan, Christel Gervais, Capucine Sassoye, Jessica Rimsza, Jincheng Du, Mark E Smith, John V Hanna, Stéphanie Sarda, Pierre Gras, Christèle Combes, Danielle Laurencin
Natural abundance 43Ca solid state NMR experiments are reported for the first time at ultra-high magnetic field (35.2 T) on a series of Ca-(pyro)phosphate and Ca-oxalate materials, which are of biological relevance in relation to biomineralization processes and the formation of pathological calcifications. The significant gain in both sensitivity and resolution at 35.2 T leads to unprecedented insight into the structure of both crystalline and amorphous phases.
August 10, 2018: Chemical Communications: Chem Comm
Mohammad F Mehbub, Jason E Tanner, Stephen J Barnett, Jan Bekker, Christopher M M Franco, Wei Zhang
Sponge-bacteria interactions are very important due to their ecological and biological significance. To understand the impact of interactions between sponges and bacteria (both associated with and external to sponges) on sponge-associated microbial diversity, sponge metabolite profiles and bioactivity, we used a controlled aquarium system and designed an experimental approach that allows the study of sponge-bacteria interactions in a well-defined manner. To test the feasibility of this approach, this system was used to study the interaction between a sponge Aplysilla rosea and a marine bacterium commonly found in seawater, Vibrio natriegens...
August 7, 2018: Scientific Reports
Anastasiya V Sharko, Oliver Erhart, Harald Krautscheid, Kostiantyn V Domasevitch
Electronic distortions, which are inherent in the oxide fluoride anions [MOF5 ]2- (M = Nb and Ta), provide an origin of polar molecular arrangements for the development of new polar second-harmonic-generating, piezo-, pyro- and ferroelectric materials. It is still a challenge to expand this approach to the realm of metal-organic polymers, while insufficient control over the environment of the [MOF5 ]2- units results in their orientational disorder and loss of polarity. The structures of catena-poly[[tris(3,4,5-trimethyl-1H-pyrazole-κN2 )copper(II)]-μ-oxido-[tetrafluoridoniobium(V)]-μ-fluorido], [CuNbF5 O(C6 H10 N2 )3 ]n , (I), and its isostructural pentafluoridooxidotantalate(V) analogue, catena-poly[[tris(3,4,5-trimethyl-1H-pyrazole-κN2 )copper(II)]-μ-oxido-[tetrafluoridotantalum(V)]-μ-fluorido], [CuTaF5 O(C6 H10 N2 )3 ]n , (II), are the first examples of the strict orientational order of [MOF5 ]2- (M = Nb and Ta) in one-dimensional coordination chains...
August 1, 2018: Acta Crystallographica. Section C, Structural Chemistry
Huilin You, Yanmin Jia, Zheng Wu, Feifei Wang, Haitao Huang, Yu Wang
Many 2D few-layer materials show piezoelectric or pyroelectric effects due to the loss-of-inversion symmetry induced by broken structure, although they are not piezoelectric or pyroelectric in the bulk. In this work, we find that the puckered graphene-like 2D few-layer black phosphorene is pyroelectric and shows a pyro-catalytic effect, where the pyroelectric charges generated under ambient cold-hot alternation are utilized for hydrogen evolution and dye molecule decomposition. Under thermal cycling between 15 °C and 65 °C, the 2D few-layer black phosphorene shows a direct hydrogen generation of about 540 μmol per gram of catalyst after 24 thermal cycles and about 99% decomposition of Rhodamine B dye after 5 thermal cycles...
July 23, 2018: Nature Communications
Isabel Viera, Kewei Chen, José J Ríos, Itziar Benito, Antonio Pérez-Gálvez, María Roca
SCOPE: The dietary intake of chlorophylls is estimated to be ≈50 mg d-1 . However, their first pass metabolism and systemic assimilation is not well characterized. METHODS AND RESULTS: A group of 30 mice are fed a diet rich in chlorophylls, while 10 mice received a standard diet without chlorophylls (control group). Liver extracts are analyzed every 15 days by HPLC-ESI(+)/APCI(+)-hrTOF- MS/MS to measure the accretion of specific chlorophyll metabolites. The chlorophyll profile found in the livers of mice fed a chlorophyll-rich diet shows that the formation and/or absorption of pheophorbides, pyro-derivatives, and phytyl-chlorin e6 require the occurrence of a precise first-pass metabolism...
July 20, 2018: Molecular Nutrition & Food Research
Gopinath Rana
Experimental studies has been carried out to isolate and identify an active antifilarial compound from Vitex negundo L. plant as it has been used for treatment against filariasis in Indian traditional system of medicine. In vitro antifilarial assay has been carried out against adult filarial parasite Setaria cervi worms by both worm motility and MTT reduction assays. Levels of oxidative stress parameters MDA, carbonyl content and nitric oxide levels have been detected. The isolated compound exhibited significant antifilarial activity in dose dependent manner...
May 2018: Parasite Epidemiology and Control
Benjamin K Liebov, Alejandro D Arroyo, Natalia I Rubtsova, Sofya A Osharovich, E James Delikatny, Anatoliy V Popov
The near-infrared fluorescent activatable smart probe Pyro-phosphatidylethanolamine (PtdEtn)-QSY was synthesized and observed to selectively fluoresce in the presence of phosphatidylcholine-specific phospholipase C (PC-PLC). PC-PLC is an important biological target as it is known to be upregulated in a variety of cancers, including triple negative breast cancer. Pyro-PtdEtn-QSY features a QSY21 quenching moiety instead of the Black Hole Quencher-3 (BHQ-3) used previously because the latter contains an azo bond, which could lead to biological instability...
June 30, 2018: ACS Omega
Yahong Han, Shan Qiu, Hongyun Zeng, Fang Ma, Jue Wang, Yilun Qiu, Xuedi An
Tourmaline is a ring borosilicate with unique pyro-electricity and piezoelectricity values. Non-gem tourmaline is usually used as an environmental material. The short-term effects of ultrafine tourmaline particles on nitrogen removal performs microbial population dynamics. Key functional species in a sequencing batch reactor were investigated at 9 ± 1 °C. The investigation results showed that 1 g·L−1 ultrafine tourmaline particles could resist the effect of temperature shock on the metabolism of NH₄⁺-N and were beneficial to the restoration of the metabolism capacity of NH₄⁺-N...
June 17, 2018: International Journal of Environmental Research and Public Health
Dong-Kyun Ban, Mohit Kumar, Malkeshkumar Patel, Joondong Kim
The data presented in this article includes the photograph of prepared samples and transient photoresponses for 365 and 850 nm wavelengths at different intensities. The original photographs of the working device made of vertically grown SnS layers on Si substrate are presented from the previous results (Kumar et al., 2017, 2018) [1], [2]. Reproducibility measure of the device were checked for thousands of cycles and presented with estimated parameters such as photo current density and photo+pyro current density...
June 2018: Data in Brief
Barbara Falatová, Marta Ferreiro-González, Carlos Martín-Alberca, Danica Kačíková, Štefan Galla, Miguel Palma, Carmelo G Barroso
In arson attacks the detection of ignitable liquid residues (ILRs) at fire scenes provides key evidence since ignitable liquids, such as gasoline, are commonly used to initiate the fire. In most forensic laboratories gas chromatography-mass spectrometry is employed for the analysis of ILRs. When a fire occurs, suppression agents are used to extinguish the fire and, before the scene is investigated, the samples at the scene are subjected to a variety of processes such as weathering, which can significantly modify the chemical composition and thus lead to erroneous conclusions...
June 14, 2018: Sensors
Mengdie Min, Yanming Liu, Chengyi Song, Dengwu Zhao, Xinyu Wang, Yiming Qiao, Rui Feng, Wei Hao, Peng Tao, Wen Shang, Jianbo Wu, Tao Deng
This paper reports the highly efficient pyroelectric nanomaterial-based catalytic degradation of waste dye under rapid temperature oscillation, which was achieved by periodical solar irradiation on a porous pyroelectric membrane that was floating at the liquid/air interface. Such a membrane consists of the light-to-heat conversion carbon black film as the top layer and the porous poly(vinylidene difluoride) (PVDF) film embedded with pyroelectric barium titanate (BaTiO3 ) nanoparticles (BTO NPs) as the bottom layer...
June 27, 2018: ACS Applied Materials & Interfaces
Fabrizio Antonio Viola, Andrea Spanu, Pier Carlo Ricci, Annalisa Bonfiglio, Piero Cosseddu
In this study, a novel approach to the fabrication of a multimodal temperature and force sensor on ultrathin, conformable and flexible substrates is presented. This process involves coupling a charge-modulated organic field-effect transistor (OCMFET) with a pyro/piezoelectric element, namely a commercial film of poly-vinylene difluoride (PVDF). The proposed device is able to respond to both pressure stimuli and temperature variations, demonstrating the feasibility of the approach for the development of low-cost, highly sensitive and conformable multimodal sensors...
May 23, 2018: Scientific Reports
Parikshit Sahatiya, Akash Shinde, Sushmee Badhulika
Even though 2D ZnO has been utilized for enhanced self-powered sensing by strain modulation due to its piezoelectric property, study on utilizing the pyroelectric property of ZnO remains unexplored. The piezoelectric property of 2D ZnO works on mechanical strain, which disrupts the structure of ZnO leading to the failure of the device. For a pyroelectric nanogenerator, the temperature difference can be triggered by an external light source, which does not disrupt the ZnO structure and also avoids the need for physical bending/pressing, as in the case of a piezoelectric nanogenerator...
August 10, 2018: Nanotechnology
Yuancun Zhao, Xiaogang Chen, Yiwen Yang, Xiaohong Zhao, Shu Zhang, Zehua Gao, Ting Fang, Yufang Wang, Ji Zhang
Diatom examination has always been used for the diagnosis of drowning in forensic practice. However, traditional examination of the microscopic features of diatom frustules is time-consuming and requires taxonomic expertise. In this study, we demonstrate a potential DNA-based method of inferring suspected drowning site using pyrosequencing (PSQ) of the V7 region of 18S ribosome DNA (18S rDNA) as a diatom DNA barcode. By employing a sparse representation-based AdvISER-M-PYRO algorithm, the original PSQ signals of diatom DNA mixtures were deciphered to determine the corresponding taxa of the composite diatoms...
May 7, 2018: International Journal of Legal Medicine
Daibin Zhong, Eugenia Lo, Xiaoming Wang, Delenasaw Yewhalaw, Guofa Zhou, Harrysone E Atieli, Andrew Githeko, Elizabeth Hemming-Schroeder, Ming-Chieh Lee, Yaw Afrane, Guiyun Yan
BACKGROUND: Parasite genetic diversity and multiplicity of infection (MOI) affect clinical outcomes, response to drug treatment and naturally-acquired or vaccine-induced immunity. Traditional methods often underestimate the frequency and diversity of multiclonal infections due to technical sensitivity and specificity. Next-generation sequencing techniques provide a novel opportunity to study complexity of parasite populations and molecular epidemiology. METHODS: Symptomatic and asymptomatic Plasmodium vivax samples were collected from health centres/hospitals and schools, respectively, from 2011 to 2015 in Ethiopia...
May 2, 2018: Malaria Journal
Saiful Islam, Muhammad Hilmy Alfaruqi, Dimas Yunianto Putro, Vinod Mathew, Sungjin Kim, Jeonggeun Jo, Seokhun Kim, Yang-Kook Sun, Kwangho Kim, Jaekook Kim
Rechargeable hybrid aqueous batteries (ReHABs) have emerged as promising sustainable energy-storage devices because all components are environmentally benign and abundant. In this study, a carbon-wrapped sponge-like Na3 V2 (PO4 )3 nanoparticle (NVP@C) cathode is prepared by a simple pyrosynthesis for use in the ReHAB system with impressive rate capability and high cyclability. A high-resolution X-ray diffraction study confirmed the formation of pure Na ion superionic conductor (NASICON) NVP with rhombohedral structure...
July 11, 2018: ChemSusChem
Yu-Lei Gao, Jian-Hua Zhai, Yan-Fen Chai
Sepsis is recognized as a life-threatening organ dysfunctional disease that is caused by dysregulated host responses to infection. Up to now, sepsis still remains a dominant cause of multiple organ dysfunction syndrome (MODS) and death among severe condition patients. Pyroptosis, originally named after the Greek words " pyro " and " ptosis " in 2001, has been defined as a specific programmed cell death characterized by release of inflammatory cytokines. During sepsis, pyroptosis is required for defense against bacterial infection because appropriate pyroptosis can minimize tissue damage...
2018: Mediators of Inflammation
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