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https://www.readbyqxmd.com/read/29031224/direct-one-pot-synthesis-of-cinnamaldehyde-immobilized-on-gold-nanoparticles-and-their-antibiofilm-properties
#1
Mohankandhasamy Ramasamy, Jin-Hyung Lee, Jintae Lee
The objective of the present study was to develop a one-pot strategy to synthesis gold nanoparticle complexes using cinnamaldehyde, a potent antibiofilm agent which in its free form, exhibits high volatility and unstable nature. Hence, we developed cinnamaldehyde gold nanoparticles (CGNPs) in a single step to overcome the limitations of free cinnamaldehyde. Furthermore, reduction abilities of cinnamaldehyde under different experimental conditions, that is, varying precursor concentrations of cinnamaldehyde and gold, metal salts, pH, temperature, and light sources, were investigated...
October 6, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29031098/stepwise-construction-of-a-metabolic-network-in-event-b-the-heat-shock-response
#2
Usman Sanwal, Luigia Petre, Ion Petre
There is a high interest in constructing large, detailed computational models for biological processes. This is often done by putting together existing submodels and adding to them extra details/knowledge. The result of such approaches is usually a model that can only answer questions on a very specific level of detail, and thus, ultimately, is of limited use. We focus instead on an approach to systematically add details to a model, with formal verification of its consistency at each step. In this way, one obtains a set of reusable models, at different levels of abstraction, to be used for different purposes depending on the question to address...
September 30, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29031050/paraquat-affects-mitochondrial-bioenergetics-dopamine-system-expression-and-locomotor-activity-in-zebrafish-danio-rerio
#3
Xiao H Wang, Christopher L Souders, Yuan H Zhao, Christopher J Martyniuk
The dipyridyl herbicide paraquat induces oxidative stress in cells and is implicated in adult neurodegenerative diseases. However, less is known about paraquat toxicity in early stages of vertebrate development. To address this gap, zebrafish (Danio rerio) embryos were exposed to 1, 10 and 100 μM paraquat for 96 h. Paraquat did not induce significant mortality nor deformity in embryos and larvae, but it did accelerate time to hatch. To evaluate whether mitochondrial respiration was related to earlier hatch times, oxygen consumption rate was measured in whole embryos...
October 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/29029362/altered-tdp-43-dependent-splicing-in-hspb8-related-distal-hereditary-motor-neuropathy-and-myofibrillar-myopathy
#4
Andrea Cortese, Matilde Laurà, Carlo Casali, Ichizo Nishino, Yukiko K Hayashi, Stefania Magri, Franco Taroni, Cristiana Stuani, Paola Saveri, Maurizio Moggio, Michela Ripolone, A Prelle, C Pisciotta, A Sagnelli, Anna Pichiecchio, Mary M Reilly, Emanuele Buratti, Davide Pareyson
INTRODUCTION: Mutations in the small heat shock protein 22 gene (HSPB8) have been associated with Charcot-Marie-Tooth type 2L, distal hereditary motor neuropathy (dHMN) type IIa and, more recently, distal myopathy/myofibrillar myopathy (MFM) with protein aggregates and TDP-43 inclusions. OBJECTIVE: To report a novel family with HSPB8 (K141E) -related dHMN/MFM and to investigate, in a patient muscle biopsy, whether the presence of protein aggregates was paralleled by altered TDP-43 function...
October 13, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29028811/elevated-expression-of-hsp10-protein-inhibits-apoptosis-and-associates-with-poor-prognosis-of-astrocytoma
#5
Weibing Fan, Shuang-Shi Fan, Juan Feng, Desheng Xiao, Songqing Fan, Jiadi Luo
Astrocytoma is the most common type of primary malignant brain tumor, with pretty lowly 5-year survival rate in patients. Although extended surgical removal of the tumor and postoperative chemotherapy/radiotherapy executed, still there is large recurrence rate, mainly because diffuse glioma tumor cells ubiquitously infiltrate into normal parenchyma. So it becomes a priority to hunt novel molecular and signaling pathway targets to suppress astrocyma progression. HSP10, an important member of Heat shock proteins (Hsps) family, classically works as molecular chaperone folding or degradating of target proteins...
2017: PloS One
https://www.readbyqxmd.com/read/29028771/mechanisms-of-thrombocytopenia-during-septic-shock-a-multiplex-cluster-analysis-of-endogenous-sepsis-mediators
#6
Alexandre Bedet, Keyvan Razazi, Florence Boissier, Mathieu Surenaud, Sophie Hue, Stéphane Giraudier, Christian Brun-Buisson, Armand Mekontso Dessap
BACKGROUND: Thrombocytopenia is a common feature of sepsis and may involve various mechanisms often related to the inflammatory response. This study aimed at evaluating factors associated with thrombocytopenia during human septic shock. In particular, we used a multiplex analysis to assess the role of endogenous sepsis mediators. METHODS: Prospective, observational study. Thrombocytopenia was defined as an absolute platelet count <100 G/L or a 50% relative decrease in platelet count during the first week of septic shock...
October 12, 2017: Shock
https://www.readbyqxmd.com/read/29028682/current-and-projected-burden-of-disease-from-high-ambient-temperature-in-korea
#7
Soo Eun Chung, Hae-Kwan Cheong, Jae-Hyun Park, Jong-Hun Kim, Hyunjin Han
BACKGROUND: The objective of the present study was to estimate the current and projected burden of disease from high ambient temperature using population-based data sources of nationwide mortality and morbidity in Korea. METHODS: Disability-adjusted life years (DALY) were estimated using noninjury-related deaths, and cerebrovascular and cardiovascular diseases from recently released nationwide health and mortality databases. Years of life lost and years lost due to disability were measured based on the point prevalence and number of deaths during the study period...
October 2017: Epidemiology
https://www.readbyqxmd.com/read/29028577/co2-adsorption-at-nitrogen-doped-carbons-prepared-by-k2co3-activation-of-urea-modified-coconut-shell
#8
Limin Yue, Qiongzhang Xia, Liwei Wang, Linlin Wang, Herbert DaCosta, Jie Yang, Xin Hu
This article reports on the synthesis and characterization of porous nitrogen-doped carbons synthesized by carbonization of coconut shell followed by urea modification and K2CO3 activation. The as-synthesized samples were carefully characterized by various techniques. This series of samples demonstrate high CO2 uptake at 1bar, up to 3.71mmol/g at 25°C in addition to 5.12mmol/g at 0°C. Furthermore, these sorbents possess fast CO2 adsorption kinetics, stable reusability, moderate heat of CO2 adsorption, reasonable CO2/N2 selectivity, and high dynamic CO2 capture capacity under simulated flue gas conditions...
September 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29028571/identifying-ovarian-tissue-in-the-bitch-using-anti-m%C3%A3-llerian-hormone-amh-or-luteinizing-hormone-lh
#9
Helene Alm, Bodil S Holst
Reliable methods for determining whether or not a bitch has ovarian tissue present are needed for cases with unknown neutering status. Vaginal cytology consistent with heat is indicative of functional ovarian tissue. Other methods are required when the bitch is not presented in suspected heat. Progesterone can be analyzed during 2 months after suspected heat. During other stages, assays for the analyses of anti-Müllerian hormone (AMH) and luteinizing hormone (LH) have been used. The AMH assay is expected to give detectable concentrations (positive) in bitches with ovarian tissue, and the LH assay should give negative results in intact bitches, except during the pre-ovulatory LH peak...
September 27, 2017: Theriogenology
https://www.readbyqxmd.com/read/29028441/physiological-and-pharmacological-inductors-of-hsp70-enhance-the-anti-oxidative-defense-mechanisms-of-the-liver-and-pancreas-in-diabetic-rats
#10
Maja Dimitrovska, Mirsada Dervisevik, Natasa Cipanovska, Katerina Gerazova, Suzana Dinevska-Kjovkarovska, Biljana Miova
Heat preconditioning (HP) is a powerful adaptive and protective phenomenon and the heat stress proteins (HSPs) it produces are an important determinant for the development of diabetic complications. Aspirin has been reported to modulate heat shock response in different organisms through increased induction of HSPs and is also known to exert anti-oxidative and radical scavenging effects in diabetes. We estimated the effect of physiological [heat stress (HS), 45min / 41±0.5ºC)] and pharmacological (aspirin treatment) induction of HSP70 on several parameters of oxidative state in the pancreas and liver of diabetic rats...
October 13, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/29028401/numerical-simulation-of-ion-transport-in-an-atmosphere-to-vacuum-interface-taking-into-account-gas-dynamics-and-space-charge
#11
Michael G Skoblin, Alexey V Chudinov, Ilia V Sulimenkov, Vladimir S Brusov, Alexander A Makarov, Eloy R Wouters, Viacheslav I Kozlovskiy
A two-step approach was developed for the study of ion transport in an atmospheric pressure interface. In the first step, the flow in the interface was numerically simulated using the standard gas dynamic package ANSYS CFX 15.0. In the second step, the calculated fields of pressure, temperature, and velocity were imported into a custom-built software application for simulation of ion motion under the influence of both gas dynamic and electrostatic forces. To account for space charge effects in axially symmetric interfaces an analytical expression was used for the Coulomb force...
August 2017: European Journal of Mass Spectrometry
https://www.readbyqxmd.com/read/29028396/laser-stimulated-desorption-of-organic-molecules-from-surfaces-as-a-method-of-increasing-the-efficiency-of-ion-mobility-spectrometry-analysis
#12
Artem E Akmalov, Alexander A Chistyakov, Gennadii E Kotkovskii
Application of laser-induced desorption was investigated as a method of increasing the efficiency of gas phase analyzers on principles of field asymmetric ion mobility spectrometry. Mass spectrometric data of investigations of laser desorption of pentaerythritoltetranitrate molecules and cyclotetramethylenetetranitramine molecules from quartz substrate under vacuum were obtained. Laser sources a Nd(3+):YAG with nanosecond pulse duration (λ = 532 nm) and a continuous wave diode laser (λ = 440 nm) were used...
August 2017: European Journal of Mass Spectrometry
https://www.readbyqxmd.com/read/29028357/folate-peg-nota-al18f-a-new-folate-based-radiotracer-for-pet-imaging-of-folate-receptor-positive-tumors
#13
Qingshou Chen, Xiangjun Meng, Paul McQuade, Daniel Rubins, Shu-An Lin, Zhizhen Zeng, Hyking Haley, Patricia Miller, Dinko Gonzalez Trotter, Philip S Low
The folate receptor (FR) has been established as a promising target for imaging and therapy of cancer (FR-α), inflammation, and autoimmune diseases (FR-β). Several folate-based PET radiotracers have been reported in the literature, but an 18F- labeled folate-PET imaging agent with optimal properties for clinical translation is still lacking. In the present study, we report the design and preclinical evaluation of folate-PEG12-NOTA-Al18F (1), a new folate-PET agent with improved potential for clinical applications...
October 13, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29028306/wet-spinning-of-flame-retardant-cellulosic-fibers-supported-by-interfacial-complexation-of-cellulose-nanofibrils-with-silica-nanoparticles
#14
Oleksandr Nechyporchuk, Romain Bordes, Tobias Köhnke
The inherent flammability of cellulosic fibers limits their use in some advanced applications. This work demonstrates for the first time the production of flame-retardant macroscopic fibers from wood-derived cellulose nanofibrils (CNF) and silica nanoparticles (SNP). The fibers are made by extrusion of aqueous suspensions of anionic CNF into a coagulation bath of cationic SNP at an acidic pH. As a result, the fibers with a CNF core and a SNP thin shell are produced through interfacial complexation. Silica-modified nanocellulose fibers with a diameter of ca...
October 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29028296/enhanced-flux-and-electrochemical-cleaning-of-silicate-scaling-on-carbon-nanotube-coated-membrane-distillation-membranes-treating-geothermal-brines
#15
Li Tang, Arpita Iddya, Xiaobo Zhu, Alexander V Dudchenko, Wenyan Duan, Craig Turchi, Johan Vanneste, Tzahi Y Cath, David Jassby
The desalination of inland brackish groundwater offers the opportunity to provide potable drinking water to residents and industrial cooling water to industries located in arid regions. Geothermal brines are used to generate electricity, but often contain high concentrations of dissolved salt. Here, we demonstrate how the residual heat left in spent geothermal brines can be used to drive a membrane distillation (MD) process and recover desalinated water. Porous polypropylene membranes were coated with a carbon nanotube (CNT)/poly (vinyl alcohol) layer, resulting in composite membranes having a binary structure that combines the hydrophobic properties critical for MD with the hydrophilic and conductive properties of the CNTs...
October 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29028138/2d-ruddlesden-popper-perovskites-for-optoelectronics
#16
REVIEW
Yani Chen, Yong Sun, Jiajun Peng, Junhui Tang, Kaibo Zheng, Ziqi Liang
Conventional 3D organic-inorganic halide perovskites have recently undergone unprecedented rapid development. Yet, their inherent instabilities over moisture, light, and heat remain a crucial challenge prior to the realization of commercialization. By contrast, the emerging 2D Ruddlesden-Popper-type perovskites have recently attracted increasing attention owing to their great environmental stability. However, the research of 2D perovskites is just in their infancy. In comparison to 3D analogues, they are natural quantum wells with a much larger exciton binding energy...
October 13, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29028112/the-role-of-declining-adaptive-homeostasis-in-ageing
#17
Laura C D Pomatto, Kelvin J A Davies
Adaptive homeostasis is, 'the transient expansion or contraction of the homeostatic range for any given physiological parameter in response to exposure to sub-toxic, non-damaging, signalling molecules or events, or the removal or cessation of such molecules or events (Davies, 2016a)." Adaptive homeostasis enables biological systems to make continuous short-term adjustments for optimal functioning despite ever-changing internal and external environments. Initiation of adaptation in response to an appropriate signal allows organisms to successfully cope with much greater, normally toxic, stresses...
October 13, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/29028052/point-by-point-fabrication-and-characterization-of-sapphire-fiber-bragg-gratings
#18
Shuo Yang, Di Hu, Anbo Wang
The Letter reports the inscription of fiber Bragg gratings (FBGs) in a single-crystal sapphire optical fiber via a point-by-point method by 780 nm infrared-femtosecond laser pulses. Compared to phase mask exposure, the use of the point-by-point method for the inscription provides a flexible way to fabricate sapphire FBGs and to make wavelength division multiplexing in sapphire fiber more practicable. The multiplexing of three cascade gratings is demonstrated, and their performance up to 1400°C is tested. The permanent enhancement of reflectivity by a factor of about 5 after heat treatment and the nearly linear temperature response with a slope of 25...
October 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/29028040/ex-vivo-validation-of-photo-magnetic-imaging
#19
Alex Luk, Farouk Nouizi, Hakan Erkol, Mehmet B Unlu, Gultekin Gulsen
We recently introduced a new high-resolution diffuse optical imaging technique termed photo-magnetic imaging (PMI), which utilizes magnetic resonance thermometry (MRT) to monitor the 3D temperature distribution induced in a medium illuminated with a near-infrared light. The spatiotemporal temperature distribution due to light absorption can be accurately estimated using a combined photon propagation and heat diffusion model. High-resolution optical absorption images are then obtained by iteratively minimizing the error between the measured and modeled temperature distributions...
October 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/29027955/3d-defect-localization-on-exothermic-faults-within-multi-layered-structures-using-lock-in-thermography-an-experimental-and-numerical-approach
#20
Ji Yong Bae, Kye-Sung Lee, Hwan Hur, Ki-Hwan Nam, Suk-Ju Hong, Ah-Yeong Lee, Ki Soo Chang, Geon-Hee Kim, Ghiseok Kim
Micro-electronic devices are increasingly incorporating miniature multi-layered integrated architectures. However, the localization of faults in three-dimensional structure remains challenging. This study involved the experimental and numerical estimation of the depth of a thermally active heating source buried in multi-layered silicon wafer architecture by using both phase information from an infrared microscopy and finite element simulation. Infrared images were acquired and real-time processed by a lock-in method...
October 13, 2017: Sensors
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