Work from this laboratory resulted in the development of a method for the preparation and purification of brain lipides (1) which involved two successive operations. In the first step, the lipides were extracted by homogenizing the tissue with 2: 1 chloroform-methanol (v/v), and filtering the homogenate. In the second step, the filtrate, which contained the tissue lipides accompanied by non-lip...

urinary 1-hydroxypyrene is frequently used as a major metabolite and biological indicator of the overall exposure to polycyclic aromatic hydrocarbons. in this study, solid phase extraction was appropriately conditioned with regard to sample ph, sample concentration, loading flow rate, elution solvent, washing solvent, sample volume and sorbent mass. octadecyl silica cartridge (c18) was used as ...

Recently we discovered a phenomenon: When filled with many single Lego bricks, a washing machine generates random complexes. This generation process can be viewed as a parallel analog Monte Carlo procedure. It may be used for discovering new Lego structures and for interactive "generative design". This report is preliminary and tentative.

BACKGROUND Early peritoneal recurrence of gastric carcinoma following curative resection remains a great challenge in the treatment and prevention of this disease. AIM To analyze the relationship between levels of tumor markers, carcinoembryonic antigen (CEA) and CA 19-9 in the sera and peritoneal washing, and anatomopathological aspects of the gastric carcinoma. METHODS Of the 46 patients ...

INTRODUCTION Washing and disinfection methods used by minimally processed vegetable industries of Southern Brazil were reproduced in laboratory in order to verify their effectiveness to reduce Salmonella Enteritidis SE86 (SE86) on lettuce. METHODOLOGY Among the five industries investigated, four carried out washing with potable water followed by disinfection with 200 ppm sodium hypochlorite d...

P IPET WASHING has always been a major problem in. a clinical chemistry laboratory. When blood and other body fluids are pipetted the inside of the pipets tends to retain a coating of lipids which is often difficult to remove. On the other hand, the specimens are usually small and utmost accuracy is desired. A pipet which does not drain properly and retains drops of the solution on the inside o...

PURPOSE The role of peritoneal washing cytology in determining further treatment strategies after surgery for gastric cancer remains unclear. One reason for this is the fact that optimal procedures to increase the accuracy of predicting peritoneal metastasis have not been established. The aim of this study was to evaluate the efficacy of cytology using samples harvested from two different abdom...