(1) Groups of 21 male and 21 female mice were given diets containing 20%, 10%, 1% or 0% (control) perlite for 28 weeks.
(2) Of three contained N-matter tested, hydroxy proline was the best sources of N-atom for Fusarin C. Under the absence of hydroxy proline, the Fc wasn't synthesized in perlite-liquid culture medium by F. moniliforme.
(3) Pulmonary function was studied in 117 men employed in three plants engaged in the mining and processing of perlite.
(4) CP grow best in three parts sphagnum moss peat to one part perlite, although the CPS is trialling peat-free mixes using coir.
(5) Larvae were held in either 24-well culture plates with media plus penicillin, streptomycin sulfate, nystatin, and chloramphenicol or in small salve jars on Perlite and media plus the same antibiotics.
(6) There was instead a slight increase in FVC associated with years in the perlite industry.
(7) In summary, the population of men available for study in the major perlite-producing area of the United States, who have worked for periods up to 23 years, showed no evidence of pneumoconiosis by chest radiography or by measurement of forced vital capacity.
(8) The paper describes a method for isolating alkaline ribonuclease from the culture liquid Bacillus subtilis KP 349 which involved: submerged cultivation of the producer on complex and synthetic nutrient media with optimized RNase activity, acid treatment of the total culture liquid, and filtration through perlite.
(9) The purification process takes advantage of the novel use of perlite (a filter aid) for the simultaneous purification of PT and FHA.
(10) The process consists of chromatographies on perlite then on hydroxylapatite.
(11) Lead uptake by both species whether grown in perlite medium or on filter paper soaked with Pb (NO3)2, was correlated with lead concentration.
(12) Therefore, the maximum no-effect level is considered to be 1% in the diet which developed no toxic changes in any items examined in mice treated orally with perlite for 28 weeks.
(13) Chest roentgenograms of 240 perlite workers employed for 1 to 23 years in the industry, showed no evidence of pneumoconiosis associated with perlite exposures.
(14) The distribution of individuals with FVC below 80% of predicted also showed no association with duration of perlite exposure.
(15) Multiple regression analysis showed no significant association between years of employment in perlite and either forced vital capacity (FVC) or forced expiratory volume (FEV1).
(16) For researching the biosynthesis labelled Fusarin C(Fc) by Fuscarium moniliforme, a more quick and convenient method of Fusarin C production and purification were established, and a good liquid culture medium consisted of different kinds organic matters (hydroxy proline, sucrose and glycerin), inorganic salts and perlite replaced corn grit medium.