The evaluation from prospective cohort studies on the dietary ω-3 long-chain polyunsaturated fatty acid (LCPUFA) supplementation and nutritional value is consistent. However, the effect of different types of ω-3 lon...The evaluation from prospective cohort studies on the dietary ω-3 long-chain polyunsaturated fatty acid (LCPUFA) supplementation and nutritional value is consistent. However, the effect of different types of ω-3 long-chain PUFA (ω-3 LCPUFA) on microbiota in intestine is inconsistent. In this study, the mice were divided into three groups (N, PL, FO), with AIN-93M (N), AIN-93M + Phospholipids type ω-3 LCPUFA (PL) and AIN-93M + triglyceride type ω-3 LCPUFA (FO), respectively. Denaturing Gradient Gel Electrophoresis (DGGE) was used to detect the structure of intestinal microbiota. The data showed that the composition of gut microbiota was changed by treating with the two types of ω-3 LCPUFA. The results revealed that gut microbiota’ enrichment in FO group was decreased while in PL group was increased. The data also showed that the histological morphology of the small intestine in treated mice was improved especially in group PL, which was much more significant and suggested that Phospholipids type ω-3 LCPUFA is beneficial to intestinal health.展开更多
Ultrasonic guided wave have the multi-modes and dispersive characteristics, and its modes are easy to be converted at boundary or when running into defects in pipes, which makes the discrimination of different guided ...Ultrasonic guided wave have the multi-modes and dispersive characteristics, and its modes are easy to be converted at boundary or when running into defects in pipes, which makes the discrimination of different guided waves modes of the reflection signals in pipes NDT very hard. In this work, firstly, the experiments are carried out to test two kinds of stainless steel pipes by applying guided waves NDT, one is integrated pipe and another is non-integrated pipe with a small hole defect, and the detected guided waves echo signals are respectively obtained. Secondly, the measured signals are processed by matching pursuit method and the Chirplet matching atom parameters are calculated. By calculating the time-frequency distributions spectrum of detected guided waves echo signals, torsional, flexural and longitudinal guided waves modes are identified from the intact pipe, and the two wave-packets with torsional and flexural guided waves modes are also identified from the pipe with hole defect. The results showed that the matching pursuit method has a tremendous advantage to identify different guided waves modes in pipes nondestructive testing.展开更多
文摘The evaluation from prospective cohort studies on the dietary ω-3 long-chain polyunsaturated fatty acid (LCPUFA) supplementation and nutritional value is consistent. However, the effect of different types of ω-3 long-chain PUFA (ω-3 LCPUFA) on microbiota in intestine is inconsistent. In this study, the mice were divided into three groups (N, PL, FO), with AIN-93M (N), AIN-93M + Phospholipids type ω-3 LCPUFA (PL) and AIN-93M + triglyceride type ω-3 LCPUFA (FO), respectively. Denaturing Gradient Gel Electrophoresis (DGGE) was used to detect the structure of intestinal microbiota. The data showed that the composition of gut microbiota was changed by treating with the two types of ω-3 LCPUFA. The results revealed that gut microbiota’ enrichment in FO group was decreased while in PL group was increased. The data also showed that the histological morphology of the small intestine in treated mice was improved especially in group PL, which was much more significant and suggested that Phospholipids type ω-3 LCPUFA is beneficial to intestinal health.
文摘Ultrasonic guided wave have the multi-modes and dispersive characteristics, and its modes are easy to be converted at boundary or when running into defects in pipes, which makes the discrimination of different guided waves modes of the reflection signals in pipes NDT very hard. In this work, firstly, the experiments are carried out to test two kinds of stainless steel pipes by applying guided waves NDT, one is integrated pipe and another is non-integrated pipe with a small hole defect, and the detected guided waves echo signals are respectively obtained. Secondly, the measured signals are processed by matching pursuit method and the Chirplet matching atom parameters are calculated. By calculating the time-frequency distributions spectrum of detected guided waves echo signals, torsional, flexural and longitudinal guided waves modes are identified from the intact pipe, and the two wave-packets with torsional and flexural guided waves modes are also identified from the pipe with hole defect. The results showed that the matching pursuit method has a tremendous advantage to identify different guided waves modes in pipes nondestructive testing.
