共查询到3条相似文献,搜索用时 1 毫秒
1.
Virginie Martinet Patrick Saulnier Val rie Beaumal Jean-Luc Courthaudon Marc Anton 《Colloids and surfaces. B, Biointerfaces》2003,31(1-4):185-194
Hen egg yolk is largely used as food ingredient notably because of its exceptional emulsifying properties. Low-density lipoproteins (LDL) are the main egg yolk constituent. LDL and particularly apoLDL are thought to control largely emulsifying properties of egg yolk-based products. Nevertheless, few studies have concerned the interfacial behaviour of these lipoproteins at the oil–water interface and nothing has been published about the air–water interface. Controversies still remain about LDL adsorption mechanism at the oil–water interface even if a widely spread theory suggests their breaking at the interface, allowing then their constituents to spread. The Langmuir film balance and atomic force microscopy (AFM) were used in this study in the aim to characterise LDL surface behaviour in dynamic conditions at the air–water interface. The understanding of LDL adsorption mechanism and surface organisation at the air–water interface should provide useful information about LDL behaviour at the oil–water interface. LDL and lipids extracted from LDL—neutral lipids, phospholipids and total lipids (mixture of the two previous species)—were spread at the air–water interface to clarify the role of each constituent in the lipoprotein film. Results clearly show that LDL are disrupted at the interface to release notably neutral lipids from the lipoprotein core, enabling then their spreading. Each lipid class has been identified on the LDL film isotherm and seems to behave independently and individually at the interface within the lipoprotein film. 相似文献
2.
Feng Zhao Yu-Kou Du Ping Yang Ji’an Tang Xing-Chang Li 《Colloid and polymer science》2005,283(12):1361-1365
In the present study, the structure and morphology of single sodium poly(styrenesulfonate) (PSS) molecules adsorbed to mica
surface from the natural aqueous solution is investigated using atomic force microscopy technique. Results show that single
PSS molecules are observed which show a morphology of wormlike coils. Meanwhile, single sodium poly(styrenesulfonate) (PSS)/Hexadecyltrimethylammonium
bromide (CTAB) complexes deposited on mica from the air–water interface are also observed. However, the PSS/CTA+ complexes show different conformations by appearing in the morphology of circular patches. Experimental data are in fair
agreement with the theoretical analysis. 相似文献
3.
The X-ray crystal structure of an anionic octacoordinate Eu3+ complex of the formula K12H8[Eu4(EDTMP)4] · 45H2O, where EDTMP is the ethylenediaminetetra(methylenephosphonate) anion, hereinafter referred to as I, has been determined. The crystal consists of cyclic tetrameric complex anions, in which the surrounding of each Eu3+ ion is composed of two nitrogen atoms and six oxygen atoms from phosphonate groups. One of the phosphonate groups in the ligand molecule is tridentate (O:O′,O″), thus giving rise to the formation of the tetramers. The compound was characterized by UV–Vis electronic spectroscopy. At room and liquid nitrogen temperatures the complex shows luminescence from both 5D0 and 5D1 states, the latter one, which is very rare in Eu3+ compounds with organic ligands, is probably brought about by the saturation of the coordination sphere with the phosphonate groups. 相似文献