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Abstract; [Objective] Genetic variation of Chinese fir clones on growth traits and wood properties was studied to provide references for selecting superior clones in cultivation areas and boosting plantation benefits in Guangxi. [Method] First, the differences of individual tree volume (V), wood basic density (WBD) and tracheid shape (TS) between clones were analyzed. Then the clonal repeatability and genetic correlation were calculated. Lastly. Chinese fir clones with good growth traits and wood quality were selected based on comprehensive index of multiple traits selection. and the genetic gains of the selected clones were estimated. [Result]There were extensive genetic variations between clones on growth traits and wood properties. The coefficient of variation on V, diameter at breast height (DBH). and tree height (H) was 41.06%. 16.44%. and 12.41%. Extremely significant difference

An integrated transmission system is tested in relation to the completed structure of integrated transmission system, the less failure data and the lack of reasonable failure mode analysis method. All the failure data are recorded during test, and a entropy weight fuzzy comprehensive evaluation method is proposed to analyze the failure mode criticality, through which several fuzzy and qualitative indicators are evaluated. In consideration of failure probability, failure severity, difficulty in failure detection and maintenance level, an evaluation indicator for correction difficulty is proposed from the perspective of full-life cycle, which improves the evaluation indicator system. The key failure modes and subsystems are discovered through criticality analysis, which provide valid evidence for modification, maintenance decision and life management of integrated transmission system. [ABSTRACT FROM AUTHOR]

As regards the controller design of the interval modal parameter model of the 6-DOF isolation platform, a kind of independent modal control design method considering the modal parameter uncertainty is put forward. In this method, the modal displacement transformation with uncertainty of the modal matrix is equivalent to the modal displacement measurement noise, and is considered by properly weighting of the noise in the modal controller design. And the actual force transformation with uncertainty of modal matrix is equivalent to the perturbation of the input matrix in the modal controller design. By this way, the modal controller design with uncertainty of modal matrix is transformed into the controller design of the new auxiliary system with perturbation of the input matrix, which establishes the foundation of the application of the independent modal control method for interval modal parameter model. The active isolation experiment for the 6-DOF isolation platform was carried Out under direct disturbance and base disturbance respectively, and the experimental results verify the effectiveness of the proposed control method. [ABSTRACT FROM AUTHOR]

Objective: To investigate the protective effect of fermented Lycium barbarum polysaccharides (FLBP) on the intestine in an aging mouse model. Methods: The aging model was established by continuous subcutaneous injection of 1 000 mg/(kg mb · d) D-galactose in the back of the neck, followed by gavage of low (150 mg/(kg mb · d)) and high (300 mg/(kg mb · d)) doses of FLBP. After 10 weeks, body mass, organ indexes, serum inflammatory markers and anti-inflammatory indicators including tumor necrosis factor-α (TNF-α), interleukin (IL)-1β, IL-6 and IL-10 levels, intestinal permeability, intestinal barrier damage biomarkers such as lipopolysaccharide (LPS) and lipopolysaccharide binding protein (LBP) contents, the histological structure of the colon, colonic mucin 2 (Muc2) expression, intestinal flora composition and fecal short-chain fatty acid contents were detected and analyzed. Results: High-dose FLBP antagonized D-galactose-induced growth retardation and thymus atrophy, decreased the serum levels of TNF-α, IL-1β and IL-6 and significantly increased serum IL-10 levels in the aging mice (P < 0.05). Furthermore, FLBP significantly ameliorated colonic barrier damage in mice, as evidenced by a significant decrease in intestinal permeability, LPS and LBP contents (P < 0.05), alterations in colonic tissue structure, and a significant increase in MUC2 secretion (P < 0.05). Meanwhile, FLBP regulated the gut microbiota composition by changing the α- and β-diversity, increasing the relative abundance of the beneficial bacteria norank_f_Muribaculaceae and Lactobacillus, and decreasing the relative abundance of the harmful bacteria Atopostipes and Jeotgalicoccus, and increasing the fecal contents of acetic acid, propionic acid, valeric acid and isobutyric acid significantly (P < 0.05). Conclusion: High-dose FLBP reduced circulating pro-inflammatory cytokine levels and enhanced anti-inflammatory function in aging mice, which might be related to improving colonic barrier function, regulating the intestinal flora composition, and increasing the levels of beneficial SCFAs in the intestinal tract of mice. This study provides a theoretical reference for the application of FLBP as a functional food ingredient for intestinal health.

In this study, the Longissimus dorsi muscle of Qinchuan cattle was injected with the proteasome inhibitor MG-132 immediately postmortem and then stored at 4 ℃. The effect of the ubiquitin-proteasome pathway (UPP) on protein degradation as well as changes in the proteasome activity, ubiquitin content and microstructure of the muscle during postmortem storage was explored in order to provide theoretical support for precise postmortem regulation of beef quality. With the extension of storage time, proteasome activity was lower and the contents of total soluble protein and ubiquitin were higher in the MG-132 group than in the control group. The sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) results showed that the band intensity of total soluble proteins between 40 and 250 kDa was greater in the MG-132 group than in the control group; muscle structure was better preserved in the MG-132 group, and the Z line and the boundary between light and dark bands were clearer than those in the control group. The contents of total soluble protein and ubiquitin showed a significantly positive correlation (P < 0.05). In conclusion, postmortem injection of MG-132 inhibited the proteasome activity and the degradation of ubiquitinated proteins in the UPP in Qinchuan beef, which in turn altered protein degradation and attenuated muscle damage. This suggests that the UPP has a potential role in meat quality formation; the proteasome not only degrades proteins by itself alone to destroy beef myofibrillar structure, but also influences postmortem beef protein degradation through mediating the UPP, ultimately affecting postmortem beef quality.