The effect of short- vs. long-term platelet-activating factor exposure on mouse preimplantation embryo development

Preimplantation mouse embryos (n = 1540) were cultured in the presence of platelet-activating factor (PAF) (10(-7)- 10(-14) mol/l) to the hatched blastocyst stage. A dose-dependent negative correlation (-0.75783) relationship between blastocysts and the concentration of PAF was statistically significantly different (p < 0.001). Long-term but not short-term PAF exposure is detrimental to preimplantation Swiss Webster mouse embryos. Short-term PAF (10(-9) mol/l) exposure was found significantly (p < 0.05) to reduce blastocoel diameter. The effect of PAF during preimplantation development may be genotype dependent and be affected by the culture conditions.     

新型阳离子聚丙烯酰胺微粒的研究 Ⅱ.含PEO支链阳离子聚丙烯酰胺微粒的絮凝性能

以丙烯酰胺、丙烯酰氧基乙基三甲基氯化铵、聚氧乙烯大单体和N ,N’ -亚甲基双丙烯酰胺为单体 ,进行四元反相微乳液共聚合 ,制备出新型含PEO支链的阳离子微粒絮凝剂。然后用该微粒絮凝剂分别对针叶木纸浆和特种纸白水进行了助留和絮凝性能的研究 ,结果表明 ,本新型微粒具有能单独使用、絮凝效果好和抗剪切性强等优点。     

Human cholesterol synthesis measurement using deuterated water. Theoretical and procedural considerations

Creation of a dynamic levator aponeurosis fold or double eye adds to the beauty of the East Asian. The eyes are larger and less puffy, and the eyelashes appear longer and curve up and out instead of down. The distance from the ciliary border to the eyebrow is decreased and more in proportion. The Mongolian trait is preserved.     

Implant-supported prostheses for treatment of adults with cleft palate

Six adult patients with cleft palate, ranging in age from 47 to 78 years, were treated with self-tapping titanium implants. Twenty-three implants, 7 to 15 mm in length, were placed. Of these, one (4%) was 7 mm, eight (35%) were 10 mm, nine (39%) were 13 mm, and five (22%) were 15 mm. Time between stage I and stage II implant surgeries was 5 to 14 months, averaging 8.3 months. Time from stage II surgery to the present is 1.5 to 5 years, averaging 3 years. Of the 23 implants placed, 21 (91%) achieved osseointegration. One (4%) implant was not used prosthetically. Two (9%) 10 mm implants failed to integrate in one patient. All patients were treated with a maxillary complete denture or overdenture. Five (83%) required the addition of a pharyngeal section for speech enhancement.