Methods for transporting a biologically active agent across a cellular membrane or a lipid bilayer. A first method includes the steps of:
(a) providing a biologically active agent which can exist in a native conformational state, a denatured conformational state, and an intermediate conformational state which is reversible to the native state and which is conformationally between the native and denatured states;
(b) exposing the biologically active agent to a complexing perturbant to reversibly transform the biologically active agent to the intermediate state and to form a transportable supramolecular complex; and
(c) exposing the membrane or bilayer to the supramolecular complex, to transport the biologically active agent across the membrane or bilayer. The perturbant has a molecular weight between about 150 and about 600 daltons, and contains at least one hydrophilic moiety and at least one hydrophobic moiety. The supramolecular complex comprises the perturbant non-covalently bound or complexed with the biologically active agent. In the present invention, the biologically active agent does not form a microsphere after interacting with the perturbant. A method for preparing an orally administrable biologically active agent comprising steps (a) and (b) above is also provided as are oral delivery compositions.
Additionally, mimetics and methods for preparing mimetics are contemplated.
Disclosed are novel compounds having NPR-B agonistic activity. Preferred compounds are linear peptides containing 8-13 conventional or non-conventional L- or D-amino acid residues connected to one another via peptide bonds.
所公开的是具有 NPR-B 激动活性的新型化合物。优选化合物是线性肽,含有 8-13 个通过肽键相互连接的常规或非常规 L 或 D 氨基酸残基。
Glycerin triester plasticizer
申请人:——
公开号:US20030116750A1
公开(公告)日:2003-06-26
The present invention provides a phthalate-free plasticizer for polymer resins. The phthalate-free plasticizer according to the invention includes a mixture of different triesters of glycerin, at least one of which meets the formula:
CH
2
(OOR
1
)CH(OOR
2
)CH
2
(OOR
3
)
wherein at least two of R
1
, R
2
, and R
3
are different alkyl or aryl groups. Phthalate-free plasticizers according to the invention can be made by esterifying glycerin with a mixture of acids in the presence of a catalyst. Preferably, the mixture of acids includes at least two selected from the group consisting of alkyl acids and aryl acids, with each acid in the mixture containing up to about 11 carbon atoms, and more preferably from about 4 to about 9 carbon atoms each. The plasticizer according to the invention can be used to modify the properties of a wide variety of polymers including vinyl polymers, rubbers, polyurethanes, and acrylics, and has superb thermostability and low volatility.
本发明提供了一种用于聚合物树脂的不含邻苯二甲酸盐的增塑剂。根据本发明,不含邻苯二甲酸盐的增塑剂包括不同甘油三酯的混合物,其中至少有一种符合以下式子:
CH
2
(OOR
1
) CH(OOR
2
) CH
2
(OOR
3
)
其中至少两个 R
1
, R
2
和 R
3
是不同的烷基或芳基。根据本发明,不含邻苯二甲酸酯的增塑剂可通过在催化剂存在下将甘油与酸的混合物酯化而制成。酸混合物最好包括至少两种从烷基酸和芳基酸组成的组中选出的酸,混合物中的每种酸最多含有约 11 个碳原子,更优选的是每种酸含有约 4 至约 9 个碳原子。本发明的增塑剂可用于改变包括乙烯基聚合物、橡胶、聚氨酯和丙烯酸树脂在内的多种聚合物的性能,并具有极佳的热稳定性和低挥发性。
Glycerin Triester Plasticizer
申请人:Ferro Corporation
公开号:US20040106819A1
公开(公告)日:2004-06-03
The present invention provides a phthalate-free plasticizer for polymer resins. The phthalate-free plasticizer according to the invention includes a mixture of different triesters of glycerin, at least one of which meets the formula:
CH
2
(OOR
1
)CH(OOR
2
)CH
2
(OOR
3
)
wherein at least two of R
1
, R
2
, and R
3
are different alkyl or aryl groups. Phthalate-free plasticizers according to the invention can be made by esterifyng glycerin with a mixture of acids in the presence of a catalyst. Preferably, the mixture of acids includes at least two selected from the group consisting of alkyl acids and aryl acids, with each acid in the mixture containing up to about 11 carbon atoms, and more preferably from about 4 to about 9 carbon atoms each. The plasticizer according to the invention can be used to modify the properties of a wide variety of polymers including vinyl polymers, rubbers, polyurethanes, and acrylics, and has superb thermostability and low volatility.
本发明提供了一种用于聚合物树脂的不含邻苯二甲酸盐的增塑剂。根据本发明,不含邻苯二甲酸盐的增塑剂包括不同甘油三酯的混合物,其中至少有一种符合以下式子:
CH
2
(OOR
1
) CH(OOR
2
) CH
2
(OOR
3
)
其中至少两个 R
1
, R
2
和 R
3
是不同的烷基或芳基。根据本发明,不含邻苯二甲酸酯的增塑剂可通过在催化剂存在下将甘油与酸的混合物酯化而制成。酸混合物最好包括至少两种从烷基酸和芳基酸组成的组中选出的酸,混合物中的每种酸最多含有约 11 个碳原子,每种酸最好含有约 4 至约 9 个碳原子。本发明的增塑剂可用于改变包括乙烯基聚合物、橡胶、聚氨酯和丙烯酸树脂在内的多种聚合物的性能,并具有极佳的热稳定性和低挥发性。