摘要:
The present invention relates to new epoxy-azetidinones of the general formula I, which are prepared by epoxidizing azetidinones of the general formula II.
These compounds are useful intermediates for the prepararion of new potential inhibitors of β-lactamases.
摘要:
Synthesized recently phosphorus containing cethysine derivatives in general formula (I) have been stated, where n=0, 1; at n=0 X=S; R=CH3; C2H5; C3H7; 1=C3H7; C4H9 at n=1 X=0, R=CH3, R1=1-C3H7; C6H5; n-CH3O-. It has been shown that some of the synthesized compounds display high hepatoprotective and antienzyme activity.
摘要:
The proposed method of producing a homogeneous catalyst for fuels involves adding acetone or homologues of acetone to the fuel and enriching the fuel with carbonyl compounds, in particular glyoxal or polyglyoxal, by oxidation with O3 or O2/O3 mixtures. Enrichment takes place preferably in the presence of heterogeneous catalysts with oxidising properties. The heterogeneous catalysts which can be used are the metals iron, manganese, copper, cerium, molybdenum, tungsten, vanadium, bismuth, titanium, rhodium, platinum and palladium, or their oxides, sulphides, phosphates or mixtures. The application also concerns a fuel containing a homogeneous catalyst produced by this method.
摘要:
Gegenstand der Erfindung ist ein Verfahren und eine Anlage zum Reinigen von Abwasser in mehreren aufeinanderfolgenden Phasen, wobei in der ersten Phase (A) das Abwasser belüftet und in einer zweiten Phase (B), die auch eine Schlammrückführung aufweist, zwischengeklärt wird und wobei dann gegebenenfalls in einer dritten Phase (C) eine Nachbelüftung und in einer vierten Phase (D) eine Nachsedimentation erfolgt, wobei man die Reaktionsprozesse in einer vorgeschalteten anaeroben Phase beeinflußt, indem man die Verweilzeit durch Volumenanpassung verändert.
摘要:
The method is to developed a two-phase flow in the circulation circuit. This method is defined by the fact, that a two-phase flow is developed by means of hydrogen introduction into the coolant. Hydrogen can be introduced in mixture with an inert gas or water steams.
摘要:
The method is to develop an anticorrosive cover out of oxides of structural steel components on a circuit internal surface. The method is defined by the fact, that in the course of the circuit operation, the oxygen concentration, which is dissolved in the coolant, is maintained not lower than the value, which has bean determined from the expression IgC=-0.33-2790/T+IgC s +IgJC Pb , where
C is the concentration of oxygen, dissolved in the coolant, mass %; T is the coolant maximum temperature In the circuit, °K; C s is the saturated concentration of oxygen dissolved in the coolant at the temperature T, mass %; J is the thermodynamic activity coefficient of lead in the coolant, inverse mass %; C Pb is the lead concentration in the coolant, mass %
摘要:
The present invention relates to new coumarin derivatives represented by the general formula I wherein
R 1 = NH 2 or -NHCH=C(CO 2 C 2 H 5 ) 2 , R 2 = R 3 = R 4 = H, R 5 = F, R 1 = R 3 = NHCH=C(CO 2 C 2 H 5 ) 2 , R 2 = R 4 = R 5 = H, R 1 = H or OH, R 3 = NHCH=C(CO 2 C 2 H 5 ) 2 , R 2 = R 4 = R 5 = H, R 1 = OH, R 2 = R 3 = R 4 = H, R 5 = -NHCH=C(CO 2 C 2 H 5 ) 2 , R 1 = R 3 = R 5 = H, R 2 = CH 3 or CF 3 , R 4 = -NHCH=C(CO 2 C 2 H 5 ) 2 , processes for the preparation thereof and their use as intermediates for the synthesis of new coumarin derivatives with potential biological action.
摘要翻译:本发明涉及由通式I 表示的新香豆素衍生物,其中R 1 = NH 2或-NHCH = C(CO 2 C 2 H 5)2,R 2 = R 3 = R 4 = H R 5 = F,R 1 = R 3 = NHCH = C(CO 2 C 2 H 5)2,R 2 = R 4 = R 5 = H,R 1 = H或 OH,R 3 = NHCH = C(CO 2 C 2 H 5)2,R 2 = R 4 = R 5 = H,R 1 = OH,R 2 = R 3 = R 4 = H,R 5 = -NHCH = C(CO 2 C 2 H 5)2,R 1 = R 3 = R 5 = H,R 2 = CH 3或CF 3,R 4, = -NHCH = C(CO 2 C 2 H 5)2,其制备方法及其作为合成具有潜在生物作用的新香豆素衍生物的中间体的用途。
摘要:
The present invention relates to DNA sequences encoding insulin precursors of formula B-Pg-A, wherein B and A represent B- and A-chains, respectively, and Pg represents modified C-peptide or any number of amino acids comprising at least one glycosylation consensus site. The invention also relates to a process for the preparation of insulin by culturing suitable cells, preferably fungal cells, transformed with a vector comprising DNA sequence encoding insulin precursor of given formula. The invention further relates to DNA sequences encoding pharmaceutical peptides and proteins in which N-glycosylation consensus site is introduced in a non-essential site in any spacer region for higher expression and secretion of proteins.