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Copyright of Aero Weaponry is the property of Aero Weaponry Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Test & Measurement Technology is the property of Publishing Center of North University of China and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ordnance Equipment Engineering is the property of Chongqing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The fuel metering unit (FMU) is one of the core components of an aero-engine, and its performance directly affects the overall safety and reliability of the aero engine. Therefore, the research on simulation modeling and fault diagnosis of FMU is an important part of aero engine health management technology and has great research value. Taking a certain type of fuel metering component as the research object, its simulation model based on AMESim was established in this paper. Considering the uncertainties in the working process of the system, the probability-based method was used to measure the system uncertainty and carry out the uncertainty propagation. The displacement of the metering valve spool and the control current of servo valve were extracted, and the velocity gain curve was established to characterize the overall operating performance of the assembly. Aiming at the uncertainty of the fault feature values, a fault feature evaluation method was proposed based on the receiver operating characteristic curve to quantitatively evaluate the potential of the fault features for fault diagnosis. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

BACKGROUND: Proteinuria is an independent risk factor for the progression of diabetic nephropathy, and the occurrence and development of proteinuria is closely related to podocyte injury. OBJECTIVE: To observe the effect of astragaloside-incubated human adipose-derived stem cells (Ast-hADSCs) on renal injury in a rat model of diabetic nephropathy. METHODS: Human adipose-derived stem cells were purchased from ATCC, USA. Male Sprague-Dawley rats were purchased from the Animal Experimental Center of Shanghai University of Traditional Chinese Medicine. The study protocol was approved by the Animal Ethics Committee of Shanghai University of Traditional Chinese Medicine. Rats were randomly divided into normal group, model group, hADSCs group and Ast-hADSC group. Animal models of diabetic nephropathy were established by left kidney extraction combined with streptozotocin injection in the latter three groups. hADSCs or Ast-hADSCs suspension was infused via the tail vein in the two intervention groups, every 2 weeks, for six sessions. Rats in the model group were given the same volume of normal saline. Levels of renal function indicators, blood lipids, urine microalbumin and urine protein were detected at 23 weeks. The pathological changes and glomerular area of the kidney were observed by hematoxylin-eosin staining and Masson staining. The podocyte density was detected by WT-1 staining. The distribution of stem cells in the kidney was observed by laser confocal microscopy. RESULTS AND CONCLUSION: Compared with the model group, there was a reduction in total cholesterol, urine microalbumin and urine protein levels decreased in the two intervention groups. Moreover, a greater reduction was found in the Ast-hADSC group than the hADSC group (P < 0.05). Triacylglycerol, low-density lipoprotein, urea nitrogen, high-density lipoprotein levels were similar in the model, hADSC and Ast-hADSC groups (P > 0.05). Renal pathological findings revealed a relief in renal damage and reduced renal index and glomerular cross-sectional area but significantly increased podocyte density in the hADSC and Ast-hADSC groups (P < 0.01). The renal pathological changes of the Ast-hADSC group were superior to those of the hADSC group (P < 0.05). Under the laser confocal microscope, a small amount of red fluorescence was expressed in the kidney. These results indicate that transplantation of human adipose-derived stem cells through the tail vein can increase the density of podocytes, reduce renal damage, and improve proteinuria in diabetic nephropathy rats. Incubation with astragaloside IV for 48 hours can promote the efficacy of human adipose-derived stem cells in the repair of damaged kidney tissue in diabetic nephropathy rats. [ABSTRACT FROM AUTHOR]

Copyright of New Building Materials / Xinxing Jianzhu Cailiao is the property of New Building Materials Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)