Occurrence of phenolic compounds in the seed coat and the cotyledon of peas (Pisum sativum L.)

This work determined the phenolic composition of the seed coat and the cotyledon of two varieties of dark peas (Pisum sativum L), Fidelia and ZP-840, by HPLC-PAD and HPLC-MS. High concentrations of glycosides of quercetin, luteolin and apigenin were found in the seed coat of both varieties of peas. Minor concentrations of monomers and dimers of proanthocyanidins were identified. The cotyledon mainly contains hydroxybenzoic and hydroxycinnamic compounds and some of the flavone and flavonol glycosides found in the seed coat. Two conjugated compounds with malic acid, trans p-coumaroyl-malic acid and p-hydroxybenzoyl-malic acid were identified in the cotyledon and in the seed coat, and the stilbene trans-resveratrol-3-glucoside, only in the seed coat. These compounds had not been previously reported in peas. The results obtained allow an overview of the distribution of the phenolic compounds in the seeds of these varieties of peas, and contribute to the knowledge of the implications of these compounds in the dietary intake.     

Influence of bond coat on shear adhesion strength of erosion and thermal resistant coating for carbon fiber reinforced thermosetting polyimide

Arc-sprayed Al, Zn, and plasma-sprayed Al, Zn, Ni3Al and Cu were deposited on carbon fiber reinforced polyimide substrate as bond coats for erosion and thermal resistant coating. Shear adhesion strength of different materials was tested, and microstructures of bond coats were analyzed with scanning electron microscope. The results showed that the substrate was thermally damaged when Ni3Al or Cu was deposited as bond coat, and the bond coat was delaminated from the substrate. Arc-sprayed and plasma-sprayed Al and Zn could be used as bond coat materials. For Zn as bond coat material, depositing method had little influence on shear adhesion strength. While for Al as bond coat material, plasma spray was superior to arc spray. Preheating could improve shear adhesion strength with plasma sprayed Al as bond coat. The maximum shear adhesion strength obtained in this paper was 14.15 MPa, with plasma-sprayed Al as bond coat, and the preheating temperature was 250 °C.     

涂层对TI纤维与Ti／TiAl复合材料性能影响的研究

研究了涂层对Ｔｉ纤维及Ｔｉ纤维强化γ－ＴｉＡｌ金属间化合物基复合材料性能的影响。研究结果表明，运用物理气相沉积法（ＰＶＤ）在Ｔｉ纤维表面涂覆Ｙ２Ｏ３制得Ｔｉ／ＴｉＡｌ复合材料，不仅改善了γ－ＴｉＡｌ及其复合材料的力学性能，而且使纤维与基体间的界面反应层厚度减小，涂覆Ｙ２Ｏ３较Ａｌ２Ｏ３有较高的稳定性，这对深入研究涂层对复合材料合成及性能的影响有着重要的意义。     

防止屋面渗漏的施工方法

结合某办公楼工程概况 ,就屋面渗漏的原因作了分析 ,从选材、隔气层的要求、保温层、找平层的施工等方面 ,提出了改换屋面的方法及施工中的注意事项 ,以使屋面渗漏问题得到彻底解决     

挤涂PCE复合衬里修复在线旧管道

详细叙述了在线旧管道挤涂PCE复合衬里修复技术，介绍了PCE复合衬里的结构及特性、施工工艺、技术要求等。该项技术采用高强度、耐腐蚀的PCE涂敷材料填充管壁蚀坑，形成厚达3～6mm的复合衬里。采用可重复进行的压力挤涂工艺，一次可修复长达5km的旧管道。PCE复合衬里整体性好，强度高，耐腐蚀性强，提高了管道的防腐能力和承压能力。涂层均匀连续，致密性好，无需开挖，补口工作量小，具有施工简便，费用低等优点。     

CR-39树脂镜片表面涂覆工艺的研究

介绍了采用有机硅涂料涂覆CR-39树脂镜片，提高镜片耐擦伤性和硬度，使其达到铅笔硬度5～6H。着重研究了吉林大学和成都有机硅研究中心研制的2种有机硅涂料涂覆CR-39树脂镜片的生产工艺条件、注意事项、异常现象及其解决方法。     

Surface inhibition of double base rocket propellants with photocurable unsaturated esters

Inhibition of a double base propellant surface with a good percentage of nitro bodies in the propellant composition is a rather difficult process. One of the methods of inhibiting the surface is to use unsaturated polyesters with free radical cure having high exotherm as a barrier coating. This system has been improved by using a 1:1 mix of photocurable vinyl ester with pendant —OH groups and unsaturated polyester that underwent room temperature free radical cure. Adhesion of the barrier coat to the propellant surface through its —OH groups was stronger than the propellant strength itself. Additional layers of commercially available unsaturated polyester could be easily grafted on to the barrier coat through chemical cure.     

改性丙烯酸树脂在底面合一环氧涂料中的应用研究

底面合一涂料,不仅能够缩短施工时间,而且能够在一定程度上降低施工成本。环氧涂料因其耐腐蚀性好、耐候性差,常作为底漆使用。通过对丙烯酸树脂进行改性,使其具有活性胺基,将改性后的丙烯酸树脂作为固化剂与环氧树脂进行交联反应,制备了一种底面合一环氧涂料。该涂料不仅具有良好的耐腐蚀性能,而且具有优异的户外耐久性,具有广阔的应用前景。     

沥青路面含砂雾封层在合淮阜高速公路养护中应用

本文根据沥青路面含砂雾封层在合淮阜高速公路上的应用,叙述了该技术的施工要点。通过试验检测分析其应用价值,并与普通雾封层主要性能进行了对比、提出了建议,为含砂雾封层技术的推广应用积累了经验。     

内燃机用新型金属橡胶复合垫片的研制

本文介绍了新型金属橡胶复合垫片的材料组成，生产工艺及物化反应机理，重点论述了其物理化学性能，阐述了在内燃机中的应用前景。