نتایج جستجو برای: yield 53
تعداد نتایج: 265320 فیلتر نتایج به سال:
El permanente cambio tecnológico y científico del mundo, así como el ritmo en que avanzan, traen consigo una serie de exigencias retos al sistema educativo universitario, busca cada vez más los alumnos desarrollen su potencial, respuesta a las desafíos siglo XXI .
 En esta línea CISETC (Congreso Internacional sobre Educación Tecnología Ciencias) propició un espacio académico, donde se soci...
An efficient asymmetric synthesis of 11-β-HSD inhibitor 1 has been accomplished in five linear steps and 53% overall yield, starting from the readily available 3-chloro-1-phenylpropan-1-one. The key feature of the synthesis includes an asymmetric methallylation of 3-chloro-1-phenylpropan-1-one catalyzed by the highly effective organocatalyst (S)-3,3'-F2-BINOL under solvent-free and metal-free c...
A simple, rapid and inexpensive method is described for the enzymic synthesis of [alpha-32P]ATP from [32P]Pi on a preparative scale with an overall yield of 53%. The final product contained all of the detectable radioactivity (less than 99.9%) in the alpha position and has been shown to behave identically with commerically availabe [alpha-32P]ATP during the synthesis of 3':5'-cyclic AMP in the ...
1-Vinylpyrrole-2-carbaldehydes react with acetylene at atmospheric pressure in a NaOH/EtOH/DMSO system at 7-10 °C to afford 2-(1-hydroxypropyn-2-yl)-1-vinylpyrroles in 53-94% yield. Thus, the first base-mediated direct ethynylation of pyrrolecarbaldehydes with free acetylene under modified conditions of the Favorsky reaction has been implemented to pave an expedient route to important biomolecu...
for bilateral lung transplantation is chronic obstructive pulmonary disease. The number of patients who have undergone solid organ transplantation increases every year. In 2008 alone, 27,281 organ transplantations were performed in the United States. This figure represents a large number of patients who might seek medical care in an ED. In addition, current survival rates are rising. In 1998, 1...
1. Overview: 4/1/13 1 2. First-Order Linear Differential Equations: 4/3/13 2 3. Examples of Integrating Factors: 4/5/13 4 4. Separation of Variables: 4/8/13 5 5. Autonomous Equations: 4/10/13 7 6. Exact Equations: 4/12/13 9 7. More Exact Equations: 4/15/13 10 8. Numerical Methods and Existence and Uniqueness: 4/17/13 11 9. Review of Weeks 1 to 3: 4/19/13 12 10. Systems of Differential Equation:...
Insulin first became available for use in 1922 after Banting and Best successfully treated diabetic patients with pancreatic extracts.10 In an attempt to more closely simulate physiologic conditions, additional “designer” insulins with unique kinetic properties have been developed, including a rapid-acting basal insulin that mimics baseline insulin secretion known as lispro.67,140 Several oral ...
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