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https://www.readbyqxmd.com/read/29331933/combined-effects-of-ag-and-uio-66-for-removal-of-elemental-mercury-from-flue-gas
#1
Songjian Zhao, Dongyao Chen, Haomiao Xu, Jian Mei, Zan Qu, Ping Liu, Yong Cui, Naiqiang Yan
The zirconium metal-organic framework material UiO-66 was doped with Ag nanoparticles and investigated for the removal of elemental mercury (Hg0) in flue gas. Physical and chemical characterization of the adsorbents showed that adding Ag did not change the crystal structure and morphology of the UiO-66. Ag doping can improve the redox activity of UiO-66, and the adsorbent exhibited high thermal stability and surface area. Hg0 removal experiments indicated that UiO-66 exhibited the higher performance compared with P25 and activated carbon, and the addition of Ag exhibited a significant synergistic effect with the UiO-66, which had highest Hg0 adsorption capacity (3...
January 9, 2018: Chemosphere
https://www.readbyqxmd.com/read/29331898/coadsorption-and-subsequent-redox-conversion-behaviors-of-as-iii-and-cr-vi-on-al-containing-ferrihydrite
#2
Zecong Ding, Fenglian Fu, Dionysios D Dionysiou, Bing Tang
Naturally occurring ferrihydrite often contains various impurities, and Al is one of the most prominent impurities. However, little is known about how these impurities impact the physical and chemical properties of ferrihydrite with respect to metal(loid) adsorption. In this study, a series of Al-containing ferrihydrites were synthesized and exposed to a mixed solution containing As(III) and Cr(VI). The results showed that the two contaminants can be quickly adsorbed onto the surface of Al-containing ferrihydrite under acidic and neutral conditions...
January 11, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29331880/preventive-effects-of-indole-3-carbinol-against-alcohol-induced-liver-injury-in-mice-via-antioxidant-anti-inflammatory-and-anti-apoptotic-mechanisms-role-of-gut-liver-adipose-tissue-axis
#3
Youngshim Choi, Mohamed A Abdelmegeed, Byoung-Joon Song
Indole-3-carbinol (I3C), found in Brassica family vegetables, exhibits antioxidant, anti-inflammatory, and anti-cancerous properties. Here, we aimed to evaluate the preventive effects of I3C against ethanol (EtOH)-induced liver injury and study the protective mechanism(s) by using the well-established chronic-plus-binge alcohol exposure model. The preventive effects of I3C were evaluated by conducting various histological, biochemical, and real-time PCR analyses in mouse liver, adipose tissue, and colon, since functional alterations of adipose tissue and intestine can also participate in promoting EtOH-induced liver damage...
December 10, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29331666/age-related-oxidative-changes-in-pancreatic-islets-are-predominantly-located-in-the-vascular-system
#4
Richard Kehm, Jeannette König, Kerstin Nowotny, Tobias Jung, Stephanie Deubel, Sabrina Gohlke, Tim Julius Schulz, Annika Höhn
Aged tissues usually show a decreased regenerative capacity accompanied by a decline in functionality. During aging pancreatic islets also undergo several morphological and metabolic changes. Besides proliferative and regenerative limitations, endocrine cells lose their secretory capacity, contributing to a decline in functional islet mass and a deregulated glucose homeostasis. This is linked to several features of aging, such as induction of cellular senescence or the formation of modified proteins, such as advanced glycation end products (AGEs) - the latter mainly examined in relation to hyperglycemia and in disease models...
December 29, 2017: Redox Biology
https://www.readbyqxmd.com/read/29331050/exercise-counteracts-lipotoxicity-by-improving-lipid-turnover-and-lipid-droplet-quality
#5
Evelyn Zacharewicz, Matthijs K C Hesselink, Patrick Schrauwen
The incidence of obesity and metabolic disease, such as type 2 diabetes mellitus (T2D), are rising globally. Dietary lipid over-supply leads to lipid accumulation at ectopic sites, such as skeletal muscle. Ectopic lipid storage is highly correlated with insulin resistance and T2D, likely due to a loss of metabolic flexibility - the capacity to switch between fat and glucose oxidation upon insulin stimulation - and cellular dysfunction because of lipotoxicity. However, muscle lipid levels are also elevated in endurance trained athletes, presenting a paradoxical phenotype of increased intramuscular lipids along with high insulin sensitivity - the "athletes' paradox"...
January 13, 2018: Journal of Internal Medicine
https://www.readbyqxmd.com/read/29330822/biochemical-changes-in-mussels-submitted-to-different-time-periods-of-air-exposure
#6
Madalena Andrade, Amadeu Soares, Etelvina Figueira, Rosa Freitas
Intertidal species face multiple stressors on a daily basis due to their particular habitat. The submergence at high tide in the aquatic environment and emergence at low tide to the aerial environment, associated with a wide variation of abiotic parameters, along with anthropogenic contamination are some of the daily stresses that these organisms are exposed to. With such a dynamic environment, organisms developed strategies that allow them to avoid or tolerate these stressors. Among these species, bivalves are some of the most hypoxia tolerant, being commonly used as a biomonitoring tool due to their capacity to accumulate pollutants from the environment and reflect the imposed toxic impacts...
January 13, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29330559/a-post-translational-balancing-act-the-good-and-the-bad-of-sumoylation-in-pancreatic-islets
#7
EDITORIAL
Patrick E MacDonald
Post-translational modification of proteins contributes to the control of cell function and survival. The balance of these in insulin-producing pancreatic beta cells is important for the maintenance of glucose homeostasis. Protection from the damaging effects of reactive oxygen species is required for beta cell survival, but if this happens at the expense of insulin secretory function then the ability of islets to respond to changing metabolic conditions may be compromised. In this issue of Diabetologia, He et al ( https://doi...
January 12, 2018: Diabetologia
https://www.readbyqxmd.com/read/29330446/effect-of-puerarin-in-promoting-fatty-acid-oxidation-by-increasing-mitochondrial-oxidative-capacity-and-biogenesis-in-skeletal-muscle-in-diabetic-rats
#8
Xiu-Fang Chen, Lei Wang, Yong-Zheng Wu, Shi-Yu Song, Hai-Yan Min, Yan Yang, Xuan He, Qiao Liang, Long Yi, Yong Wang, Qian Gao
BACKGROUND: Type 2 diabetes is characterized by dyslipidemia and the accumulation of lipids in non-adipose tissue, including skeletal muscle. Puerarin, which is a natural isoflavonoid isolated from the root of the plant Pueraria lobata, has been shown to have antidiabetic activity. However, the lipid-reducing effect of puerarin, in particular in skeletal muscle, has not yet been addressed. METHODS: We examined the effect of puerarin on mitochondrial function and the oxidation of fatty acids in the skeletal muscle of high-fat diet/streptozotocin-induced diabetic rats...
January 12, 2018: Nutrition & Diabetes
https://www.readbyqxmd.com/read/29330356/metabolic-and-molecular-changes-associated-with-the-increased-skeletal-muscle-insulin-action-24-48%C3%A2-h-after-exercise-in-young-and-old-humans
#9
REVIEW
Francis B Stephens, Kostas Tsintzas
The molecular and metabolic mechanisms underlying the increase in insulin sensitivity (i.e. increased insulin-stimulated skeletal muscle glucose uptake, phosphorylation and storage as glycogen) observed from 12 to 48 h following a single bout of exercise in humans remain unresolved. Moreover, whether these mechanisms differ with age is unclear. It is well established that a single bout of exercise increases the translocation of the glucose transporter, GLUT4, to the plasma membrane. Previous research using unilateral limb muscle contraction models in combination with hyperinsulinaemia has demonstrated that the increase in insulin sensitivity and glycogen synthesis 24 h after exercise is also associated with an increase in hexokinase II (HKII) mRNA and protein content, suggesting an increase in the capacity of the muscle to phosphorylate glucose and divert it towards glycogen synthesis...
January 12, 2018: Biochemical Society Transactions
https://www.readbyqxmd.com/read/29330344/parathyroid-hormone-related-protein-exhibits-antioxidant-features-in-osteoblastic-cells-through-its-n-terminal-and-osteostatin-domains
#10
S Portal-Núñez, J A Ardura, D Lozano, I Martínez de Toda, M De la Fuente, G Herrero-Beaumont, R Largo, P Esbrit
OBJECTIVES: Oxidative stress plays a major role in the onset and progression of involutional osteoporosis. However, classical antioxidants fail to restore osteoblast function. Interestingly, the bone anabolism of parathyroid hormone (PTH) has been shown to be associated with its ability to counteract oxidative stress in osteoblasts. The PTH counterpart in bone, which is the PTH-related protein (PTHrP), displays osteogenic actions through both its N-terminal PTH-like region and the C-terminal domain...
January 2018: Bone & Joint Research
https://www.readbyqxmd.com/read/29329810/facile-microencapsulation-of-olive-oil-in-porous-starch-granules-fabrication-characterization-and-oxidative-stability
#11
Miao Lei, Fang-Cheng Jiang, Jie Cai, Si Hu, Rui Zhou, Gang Liu, Yue-Hui Wang, Hai-Bo Wang, Jing-Ren He, Xin-Gao Xiong
In this study, starch with porous structures derived from purple sweet potato was prepared and used as a food-grade polymer for the microencapsulation of olive oil. The optimal reaction conditions for preparing porous starch were determined to improve its adsorption capacity as effective microcapsule-wall materials. Olive oil was then impregnated in microspheres, and loading ratio was optimized by investigating the restrictive factors, including the mass ratio of olive oil to porous starch, as well as the embedding temperature and time...
January 9, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29329795/omega-3-fatty-acids-and-adipose-tissue-biology
#12
REVIEW
Ondrej Kuda, Martin Rossmeisl, Jan Kopecky
This review provides evidence for the importance of white and brown adipose tissue (i.e. WAT and BAT) function for the maintenance of healthy metabolic phenotype and its preservation in response to omega-3 polyunsaturated fatty acids (omega-3 PUFA), namely in the context of diseased states linked to aberrant accumulation of body fat, systemic low-grade inflammation, dyslipidemia and insulin resistance. More specifically, the review deals with (i) the concept of immunometabolism, i.e. how adipose-resident immune cells and adipocytes affect each other and define the immune-metabolic interface; and (ii) the characteristic features of "healthy adipocytes" in WAT, which are relatively small fat cells endowed with a high capacity for mitochondrial oxidative phosphorylation, triacylglycerol/fatty acid (TAG/FA) cycling and de novo lipogenesis (DNL)...
January 9, 2018: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/29329609/garcinia-xanthochymus-extract-protects-pc12-cells-from-h2o2-induced-apoptosis-through-modulation-of-pi3k-akt-and-nrf2-ho-1-pathways
#13
Jing Xu, Sheng Gan, Jun Li, De-Bing Wand, Yu Chen, Xin Hu, Guang-Zhong Yang
The aim of the present study was to investigate the protective effects and underlying mechanisms of Garcinia xanthochymus, a perennial medicinal plant native to Yunnan, China, against H2O2-induced oxidative damage in rat pheochromacytoma PC12 cells. Preincubation of PC12 cells with fruit EtOAc fraction (fruit-EFr., 12.5-50 µmol·L-1) of G. xanthochymus for 24 h prior to H2O2 exposure markedly improved cell viability and increased the activities of antioxidant enzymes (superoxide dismutase, catalase, and heme oxygenase-1 [HO-1]), prevented lactate dehydrogenase release and lipid peroxidation malondialdehyde production, attenuated the decrease of matrix metalloproteinases (MMP), and scavenged reactive oxygen species (ROS)...
November 2017: Chinese Journal of Natural Medicines
https://www.readbyqxmd.com/read/29329541/a-role-for-endothelial-nitric-oxide-synthase-in-intestinal-stem-cell-proliferation-and-mesenchymal-colorectal-cancer
#14
Jon Peñarando, Laura M López-Sánchez, Rafael Mena, Silvia Guil-Luna, Francisco Conde, Vanessa Hernández, Marta Toledano, Victoria Gudiño, Michela Raponi, Caroline Billard, Carlos Villar, César Díaz, José Gómez-Barbadillo, Juan De la Haba-Rodríguez, Kevin Myant, Enrique Aranda, Antonio Rodríguez-Ariza
BACKGROUND: Nitric oxide (NO) has been highlighted as an important agent in cancer-related events. Although the inducible nitric oxide synthase (iNOS) isoform has received most attention, recent studies in the literature indicate that the endothelial isoenzyme (eNOS) can also modulate different tumor processes including resistance, angiogenesis, invasion, and metastasis. However, the role of eNOS in cancer stem cell (CSC) biology and mesenchymal tumors is unknown. RESULTS: Here, we show that eNOS was significantly upregulated in VilCre ERT2 Apc fl/+ and VilCre ERT2 Apc fl/fl mouse intestinal tissue, with intense immunostaining in hyperproliferative crypts...
January 10, 2018: BMC Biology
https://www.readbyqxmd.com/read/29329274/current-technologies-of-electrochemical-immunosensors-perspective-on-signal-amplification
#15
REVIEW
Il-Hoon Cho, Jongsung Lee, Jiyeon Kim, Min-Soo Kang, Jean Kyung Paik, Seockmo Ku, Hyun-Mo Cho, Joseph Irudayaraj, Dong-Hyung Kim
An electrochemical immunosensor employs antibodies as capture and detection means to produce electrical charges for the quantitative analysis of target molecules. This sensor type can be utilized as a miniaturized device for the detection of point-of-care testing (POCT). Achieving high-performance analysis regarding sensitivity has been one of the key issues with developing this type of biosensor system. Many modern nanotechnology efforts allowed for the development of innovative electrochemical biosensors with high sensitivity by employing various nanomaterials that facilitate the electron transfer and carrying capacity of signal tracers in combination with surface modification and bioconjugation techniques...
January 12, 2018: Sensors
https://www.readbyqxmd.com/read/29329251/pharmacological-investigation-of-the-anti-inflammation-and-anti-oxidation-activities-of-diallyl-disulfide-in-a-rat-emphysema-model-induced-by-cigarette-smoke-extract
#16
Yan Liu, Ang Li, Xiuli Feng, Xiao Sun, Xiaosong Zhu, Zhongxi Zhao
Diallyl disulfide (DADS) is the main organosulfur ingredient in garlic, with known antioxidant and anti-inflammatory activities. The aim of the present study was to investigate the effect of DADS on reducing the inflammation and redox imbalance in a rat emphysema model that was induced by intraperitoneal injection of cigarette smoke extract (CSE). Briefly, DADS exerted an anti-inflammation effect on emphysema rats through decreasing cell influx in the bronchoalveolar lavage fluid (BALF) and suppressing pro-inflammation cytokine production including tumor necrosis factor alpha (TNF-α), interleukin-1β (IL-1β), interleukin-6 (IL-6) via inhibiting the NF-κB pathway...
January 12, 2018: Nutrients
https://www.readbyqxmd.com/read/29329033/onjisaponin-b-prevents-cognitive-impairment-in-a-rat-model-of-d-galactose-induced-aging
#17
Gaowen Li, Jimian Yu, Ling Zhang, Yong Wang, Chuang Wang, Qun Chen
In this study, we investigated the potential effect of onjisaponin B (OB) on aging rats induced by D-gal (D-galactose). Sub-acute aging model was established in rats by the subcutaneous injection of D-gal (120 mg/kg) for 42 days, accompanied with OB (10, 20 mg/kg, p.o.) or normal saline intervention for 28 days since the 14th day after the beginning of D-gal stimulation. Morris water maze test and step-down passive avoidance test were conducted to evaluate the cognitive function of the rats. The superoxidase dismutase (SOD), malondialdehyde (MDA), glutathione (GSH) and glutathione peroxidase (GSH-px) contents in hippocampus were measured by according kits, respectively...
January 9, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29328051/in-situ-synthesized-sno2-nanorod-reduced-graphene-oxide-low-dimensional-structure-for-enhanced-lithium-storage
#18
Wei Zhang, Xuezhang Xiao, Yiwen Zhang, Junpeng Li, Jiayi Zhong, Meng Li, Xiulin Fan, Chuntao Wang, Lixin Chen
A unique morphology of SnO2 nanorod (NR)/reduced graphene oxide (RGO) composite has been synthesized by in-situ hydrothermal method, which is used as anode material for lithium-ion batteries. The SnO2 NR adhering on the RGO exhibit a length of 250-400 nm and diameter of 60-80 nm without any obviously aggregation. The initial discharge/charge capacities of the SnO2 NR/RGO composite are 1761.3 mAh g-1 and 1233.1 mAh g-1 with coulombic efficiency (CE) of 70 % under the current density of 200 mA g-1, and finally keep at 1101 mAh g-1 after the 50 cycles...
January 12, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29327011/highly-reversible-and-fast-sodium-storage-boosted-by-improved-interfacial-and-surface-charge-transfer-derived-from-the-synergistic-effect-of-heterostructures-and-pseudocapacitance-in-sno2-based-anodes
#19
Xin Li, Xiaohong Sun, Zhiwen Gao, Xudong Hu, Rui Ling, Shu Cai, Chunming Zheng, Wenbin Hu
Sodium-ion batteries have attracted worldwide attention as potential alternatives for large scale stationary energy storage due to the rich reserves and low cost of sodium resources. However, the practical application of sodium-ion batteries is restricted by unsatisfying capacity and poor rate capability. Herein, a novel mechanism of improving both interfacial and surface charge transfer is proposed by fabricating a graphene oxide/SnO2/Co3O4 nanocomposite through a simple hydrothermal method. The formation of heterostructures between ultrafine SnO2 and Co3O4 could enhance the charge transfer of interfaces owing to the internal electric field...
January 12, 2018: Nanoscale
https://www.readbyqxmd.com/read/29326992/a-cu-ii-metal-organic-framework-with-significant-h2-and-co2-storage-capacity-and-heterogeneous-catalysis-for-the-aerobic-oxidative-amination-of-c-sp3-h-bonds-and-biginelli-reactions
#20
Anoop K Gupta, Dinesh De, Kapil Tomar, Parimal K Bharadwaj
A Cu(ii) metal-organic framework, {[Cu2(L)(H2O)2]·(5DMF)(4H2O)}n (1), has been synthesized using an angular tetracarboxylic acid ligand (H4L) incorporating both trifluoromethyl (-CF3) and amine (-NH2) groups. Notably, the framework possesses high water and thermal stability. At atmospheric pressure, the activated framework 1' exhibits substantially high amounts of CO2 (35.5 and 20.8 wt% at 273 and 298 K respectively) and H2 (1.72 wt% at 77 K) adsorption. Also, 1' exhibits excellent catalytic activity for the condensation-cyclization reaction between 2-benzoyl pyridine and different benzylamines via oxidative amination of the C(sp3)-H bond to form 1,3-diarylated imidazo[1,5-a]pyridines under mild aerobic conditions...
January 12, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
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