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Yi-Chen Yu, Ying Jiang, Meng-Meng Yang, Sai-Nan He, Xia Xi, Ye-Tao Xu, Wen-Sheng Hu, Qiong Luo
BACKGROUND: Increasing epidemiological studies have confirmed the association between maternal preeclampsia and elevated blood pressure in their offspring. Though case-control or cohort studies have demonstrated long-term outcomes for the offspring of preeclampsia, it is still a question that how these changes were caused by genetic reasons or by preeclampsia itself. OBJECTIVE: In our study, we explored the potential epigenetic regulation of delta-like homolog 1-maternally expressed gene 3 (DLK1-MEG3) region in human umbilical vein endothelial cells (HUVECs), and its connection with endothelium-derived factors...
September 17, 2018: Journal of Hypertension
Bangsen Ouyang, Kewei Zhang, Ya Yang
Self-powered photodetectors are expected to play a crucial role in future nano-optoelectronic devices owing to their independent and sustainable operation. Based on the heterojunction between ZnO nanowires (NWs) and shuttle-like SnS, we design a self-powered photodetector exhibiting wide-range photoresponse and tunable spectral selectivity. Differently from conventional devices, a wavelength-induced photocurrent polarity is observed in the ZnO NWs/SnS photodetector, which enables the device to distinguish between photons in the UV and visible (VIS) regions...
March 23, 2018: iScience
Josephine Al-Alam, Ziad Fajloun, Asma Chbani, Maurice Millet
In order to assess the air quality in some Lebanese regions, a biomonitoring study based on honey as biomonitor candidate was conducted. For this, 18 samples of honey collected from four regions in Lebanon, were analyzed for their contamination by 16 polycyclic aromatic hydrocarbons (PAHs) and 22 polychlorinated biphenyls (PCBs). Samples were first extracted using a multi-residue extraction method based on the quick, easy, cheap, effective, rugged, and safe extraction method (QuEChERS) followed by a concentration step using Solid-phase microextraction (SPME) procedures...
September 10, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Xiao-Qiao Wang, Chuan Fu Tan, Kwok Hoe Chan, Xin Lu, Liangliang Zhu, Sang-Woo Kim, Ghim Wei Ho
Utilization of ubiquitous low-grade waste heat constitutes a possible avenue towards soft matter actuation and energy recovery opportunities. While most soft materials are not all that smart relying on power input of some kind for continuous response, we conceptualize a self-locked thermo-mechano feedback for autonomous motility and energy generation functions. Here, the low-grade heat usually dismissed as 'not useful' is used to fuel a soft thermo-mechano-electrical system to perform perpetual and untethered multimodal locomotions...
August 24, 2018: Nature Communications
Antoni Delpino-Rius, Diana Cosovanu, Jordi Eras, Francesca Vilaró, Mercè Balcells, Ramon Canela-Garayoa
A total of 48 chlorophylls and derivatives were identified and successfully determined in tea and processed vegetable and fruit foodstuff by UHPLC with photodiode-array and mass spectrometry detection. The method allowed the proper separation of chlorophyll derivatives resulting from demetallation, dephytilation, decarbomethoxylation, epimerisation and copperisation. The method was performed in less than 12 min, using an optimised ternary gradient (MeOH, iPrOH, MeCN and H2 O with 10 mM of ammonium acetate) on an ACQUITY HSS T3 column...
September 21, 2018: Journal of Chromatography. A
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...
October 10, 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 23, 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...
September 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
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