Organic modification of nano-SiO2 particles was performed with supercritical CO2 as solvent and a titanate coupling reagent NDZ-201 as the modification reagent. The surface of the nano-SiO2 particles was changed after modification by the titanate coupling reagent from hydrophilic to hydrophobic. IR and thermo-gravimetric analyses indicate that the interaction between the titanate coupling reage...

Abstract The chemical degradation of sulfate by activated Oxyone has the advantages high capacity, wide pH range and convenient transportation storage, making it one most attractive advanced oxidation processes (AOPs). Besides, Co is metal capable activating Oxone to produce sulfate. Therefore, critical develop Co-based catalyst, an effective recyclable heterogeneous for degrade tetracycline. I...

background: during the last twenty years, the extraction of specific egg yolk (igy) antibodies from the immunized chickens has been accepted as a useful alternative to the immunization of mammals. the aim of the present study was immunizing the chickens with human umbilical cord serum (hucs) and the extraction of specific anti-human globulins (igg, c3b, and c3d) antibodies from egg yolk in orde...

Direct hydroxylation via the functionalization of tertiary benzylic C(sp3)–H bonds is great significance for obtaining alcohols, which find wide applications in pharmaceuticals as well fine chemical industries. However, current synthetic procedures use toxic reagents, and therefore, development a sustainable strategy synthesis alcohols highly desirable. To solve this problem, herein, we report ...

In Paper I (1) we have described the reaction of chymotrypsinogen with carbon disulfide and the preparation of a monosubstituted derivative in which the single a-amino group of the protein has been converted to a dithiocarbamate group. A study of the reaction of 0-methylisourea with chymotrypsinogen is reported in this paper. In 1935 Greenstein found that 0-methylisourea reacts with lysine to f...

deficiency. It is not applicable to newborn or mass screening with use of ifiterpaper specimens, but is satisfactory for liquid urine screening. In one variant of sulfite oxidase deficiency, due to a defect of its molybdate cofactor metabolism, the concentration of uric acid in serum is decreased. Thus, an unexplained low serum uric acid, especially in a young patient with neurologic abnormalit...

Recombination systems based on lambda and Cre/loxP have been described to facilitate gene transfer from one vector to another in a high-throughput fashion, avoiding the bottlenecks associated with traditional cloning. However, no system described to date is suitable for the cloning of affinity reagents selected from display libraries, which requires that the recombination signals flanking the a...