TJ12／50A（B）型轮式通井机的研制与应用

从技术的先进性和经济的可行性出发,研制的TJ12/50A(B)型轮式通井机采用整体式专用底盘,辅以工程机械用转向桥和大轮胎,使整机具有良好的运移性和越野性;自携作业井架,减少了修井作业中的辅助配套设备,降低了劳动强度;采用柔性传动部件—液力变矩器和液力换档变速箱,使传动系统的可靠性大为提高。     

塔楼与桅杆的风效应影响

本文通过对广播电视塔上的塔楼及桅杆结构的模拟计算和对比分析，探讨了两者之间风效应的相互影响及有关问题。     

Purification of novel anti-inflammatory peptides from enzymatic hydrolysate of the edible microalgal Spirulina maxima

Natural bioactive peptides have been known as ingredients in nutraceuticals and pharmaceuticals. In this study, the potential anti-inflammatory peptides were purified from enzymatic hydrolysate of the edible microalgae Spirulina maxima using gastrointestinal endopeptidases (trypsin, α-chymotrypsin, and pepsin). Purification of the hydrolysate resulted in two peptides with amino acid sequences of LDAVNR (P1, 686 Da) and MMLDF (P2, 655 Da). It was found that peptides P1 and P2 exhibited significant inhibition on the release and production of histamine from antigen-stimulated RBL-2H3 mast cells. Moreover, the suppressive effect of P1 and P2 on production as well as expression of interleukin-8 in histamine-stimulated EA.hy926 endothelial cells was determined. Notably, the production of intracellular reactive oxygen species from mast cells and endothelial cells was decreased in the presence of P1 or P2. Collectively, the peptides P1 and P2 from S. maxima could be used as functional ingredients with potent anti-inflammatory benefits.     

Statische und kinetische Instabilitäten bei Bauwerken

In der Bautechnik treten oft, z. B. bei windbelasteten oder meerestechnischen Konstruktionen, statische oder dynamische Instabilitäten auf – manchmal auch ein Zusammenwirken (Interaktion) beider Mechanismen, wobei die Knick‐ oder Beuleigenformen durchaus verschieden von den entsprechenden Schwingungseigenformen sein können. Es soll dargestellt werden, wann die Stabilitätsuntersuchungen der Strukturen statisch durchgeführt werden dürfen und in welcher Form sich die Ergebnisse bei einer zusätzlichen dynamischen Belastung verändern. Static and dynamic instabilities of structures. In structural design e. g. under wind loads or offshore structures we often have static or dynamic instabilities sometimes also an interaction of both mechanisms, where the buckling modes may be different from the vibration modes. We want to recognize, whether the investigations may be static and how the results may alter by dynamic loads.