scholarly journals Microglial changes in healthy mice retina in an early aging stage

2021 ◽  
Vol 99 (S265) ◽  
Author(s):  
José A. Fernández‐Albarral ◽  
Elena Salobrar‐Garcia ◽  
Inés López‐Cuenca ◽  
María Pilar Rojas Lozano ◽  
Juan José Salazar Corral ◽  
...  
Keyword(s):  
2010 ◽  
Vol 146-147 ◽  
pp. 1667-1670
Author(s):  
Gui Qing Wang ◽  
Yan Liu ◽  
Guo Cheng Ren ◽  
Zhong Kui Zhao

The aging hardening behaviors of Al-8Si-3%Cu (wt%) and Al-3Cu (wt%) alloys have been investigated. Samples were solution treated at 500 for 24 h followed by water quenching before aging. Hardness has been measured for quenched samples aging at 150°C. Strong age hardening occurs for Al-3Cu alloy and hardness increases by about 60% after peak aging. There is a hardness decrease in the early aging stage of Al-8Si-3Cu alloy and hardness increases by about 15% after peak aging. The age precipitation behaviors have been analyzed using DSC and TEM. Effects of microstructure characteristics on age precipitation and age hardening response of Al-8Si-3Cu alloy have been discussed.


Author(s):  
Ana I. Ramírez ◽  
José A. Fernández-Albarral ◽  
Rosa de Hoz ◽  
Inés López-Cuenca ◽  
Elena Salobrar-García ◽  
...  

2007 ◽  
Vol 539-543 ◽  
pp. 417-422
Author(s):  
Ying Jun Gao ◽  
Xian Hua Hou ◽  
Chuang Gao Huang

Atomic bonding of the GPB zone and S′′ phase of Al-Cu-Mg alloys in early aging stage are calculated using the empirical electron theory (EET) in Solid. The results show that not only the covalence bond-net is very strong in GPB zone, but the whole covalence bond energy of S′′ phase is also very large, all the primary bond-net framework of these precipitates can consolidate the matrix of alloy. Phase transformation from GPB zone to S′′ phase is explained reasonably based on atomic bonding and total binding capacity of Al and Cu atoms in these precipitates.


2008 ◽  
Vol 1 (2) ◽  
pp. 84-100 ◽  
Author(s):  
Fumio Komatsu ◽  
Yasuo Kagawa ◽  
Terue Kawabata ◽  
Yoshinori Kaneko ◽  
Baatar Purvee ◽  
...  

1999 ◽  
Vol 72 (4) ◽  
pp. 721-730 ◽  
Author(s):  
G. R. Hamed ◽  
J. Zhao

Abstract Typical sulfur-cured vulcanizates of styrene-butadiene rubber (SBR) and natural rubber (NR) were prepared, and subjected to air-oven aging at 100 °C. Gum specimens exhibited an initial aging period in which stiffness was unchanged, while tensile strength and strain-to-break were significantly reduced. In contrast, black-filled vulcanizates stiffened during early aging. After intermediate aging times, NR specimens softened, while SBR stiffened. With prolonged aging, all compositions became hard and inextensible.


Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 247
Author(s):  
Valeriu V. Cotea ◽  
Mihai Cristian Focea ◽  
Camelia Elena Luchian ◽  
Lucia Cintia Colibaba ◽  
Elena Cristina Scutarașu ◽  
...  

The occurrence of aroma constituents in sparkling wines, with direct impact on their organoleptic characteristics, is affected by several factors, for example the base-wine particularities, grapes cultivar conditions, inoculated yeasts, the aging stage, and wine-making practices. This study evaluated the influence of different four commercial yeasts (IOC FIZZ™, IOC DIVINE™, LEVULIA CRISTAL™, and IOC 18-2007™) on the volatile composition of experimental sparkling wines. For this, five sparkling wines variants from the Muscat Ottonel grape variety were obtained. The base-wine was obtained through reverse osmosis and had a predetermined alcoholic concentration (10.5% vol.). In order to fulfill the proposed purpose, the experimental sparkling wines were characterized by the physical–chemical parameters (according to International Organization of Vine and Wine methods of analysis), volatile fraction (using gas-chromatography coupled with mass spectrometry technique), and sensory descriptors. Data showed a key impact on the concentration of the volatile constituents (p < 0.05), depending on the type of inoculated yeast for the second fermentation. Regarding the sensory analysis, important differences can be observed due to the type of inoculated yeast. Only a minor influence on the physical–chemical parameters was registered.


Endocrine ◽  
2006 ◽  
Vol 30 (2) ◽  
pp. 167-174 ◽  
Author(s):  
Sherry O. Kasper ◽  
Carlos M. Ferrario ◽  
Detlev Ganten ◽  
Debra I. Diz

2021 ◽  
Author(s):  
Silvia Ravera ◽  
Tiziana Vigliarolo ◽  
Silvia Bruno ◽  
Fabio Morandi ◽  
Danilo Marimpietri ◽  
...  

ABSTRACTPurposeSurvival rates of Childhood Cancer Patients have improved tremendously over the past four decades. However, cancer treatments are associated with an increased risk of developing an anticipated onset of chronic diseases typical of aging. Thus, we aimed to identify molecular/metabolic cellular alterations responsible for early aging in Childhood Cancer Survivors (CCS).Patients and MethodsBiochemical, proteomic and molecular biology analyses were conducted on mononuclear cells (MNCs) isolated from peripheral blood of 196 CCS, comparing the results with those obtained on MNCs of 154 healthy subjects.ResultsData demonstrate that CCS-MNCs show: i) inefficient oxidative phosphorylation associated with low energy status and a metabolic switch to lactate fermentation compared with age-matched normal controls; ii) increment of lipid peroxidation due to an unbalance among the oxidative stress production and the activation of the antioxidant defenses; (iii) significantly lower expression of genes and proteins involved in mitochondrial biogenesis and metabolism regulation, such as CLUH, PGC1-α, and SIRT6 in CCS, not observed in the age-matched healthy or elderly subjects. The application of a mathematical model based on biochemical parameters predicts that CCS have a biological age significantly increased by decades compared to the chronological age. Overall, the results show that the impact of chemo/chemoradiotherapy on mitochondria efficiency in 196 CCS was rather homogeneous, irrespective of cancer type, treatment protocols, and time elapsed from the end of the curative period.ConclusionsOur study identifies some biochemical and molecular alterations possibly contributing to the pathophysiology of anticipated aging and metabolic deficiency described in CCS. These results may be useful in identifying approaches to restore the mitochondrial function, slowing down the aging and the associated pathological conditions in CCS.


2014 ◽  
Vol 71 (7) ◽  
pp. 921 ◽  
Author(s):  
Emily G. Jacobs ◽  
Elissa S. Epel ◽  
Jue Lin ◽  
Elizabeth H. Blackburn ◽  
Natalie L. Rasgon

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