曲板互成120°三拐曲轴锻造工艺研究

阐述了曲板互成120°三拐曲轴锻件的整体锻造成型工艺方法及操作要点,最终生产出符合标准要求的三拐曲轴。     

汽轮机30Cr2Ni4MoV窄凹档中间轴的锻造工艺研究

阐述了汽轮机30Cr2Ni4MoV窄凹档中间轴的一种新的锻造成型方法。通过设计专用组合漏盘工具,把不符合台阶锻出条件的中间凹档部分锻出,以便于机械加工。同时工具对锻件心部附加有压应力约束,有利于中心压实,保证锻件内部质量。     

Reduction of dust deposition in air-cooled condensers in thermal power plants by Ni–P-based coatings

Clean Technologies and Environmental Policy - One of the largest problems with most current thermal power plants is the cooling efficiency. This paper aims to massively reduce fuel consumption and...     

Effects of drying methods on colour,amino acids,phenolic profile,microstructure and volatile aroma components of Boletus aereus slices

This study is to investigate the effects of hot air drying (HD) at 60–80 °C (HD-60, HD-70 and HD-80), microwave pretreatment combined with HD (MHD), ultrasound pretreatment combined with HD (UHD) and vacuum freeze drying (FD) on the quality of Boletus aereus slices. Key characteristics, including colour, free amino acids, microstructure, volatile aroma components, phenolic profile and antioxidant activity, were studied. Amongst these drying methods, FD was the best way to preserve colour and volatiles of Boletus aereus slices. Fifteen amino acids were detected in Boletus aereus slices, and HD-60 showed a higher content of total amino acids than other drying regimes. Two phenolic acids were identified in Boletus aereus slices, namely, protocatechuic acid and p-hydroxybenzoic acid. MHD presented the highest content of phenolic compounds, followed by FD. Antioxidant capacity was positively correlated with phenolic compounds of Boletus aereus slices. Moreover, the cell structure of Boletus aereus slices was damaged after drying, and FD had a more porous structure than other drying methods. These results will be beneficial to the further industrial production of Boletus aereus slices.     

Phenolic content,antioxidant capacity,and α-amylase and α-glucosidase inhibitory activities of Dimocarpus longan Lour.

Food Science and Biotechnology - The aim of this study was to compare the phenolic compound profiles and antioxidant capacities of eight varieties of longan (Dimocarpus longan Lour.) planted in the...