The adverse effect of mineral dust on general health level of the population has been widely studied lately. The research interest has been mainly focused on the respiratory function of coal miners and workers exposed to silica and asbestos containing dust [1-3] because a significant increase in COPD independent of smoking has been observed [4-5]. Among the materials considered hazardous for wo...

Johnson, H. M. (Robert A. Taft Sanitary Engineering Center, Cincinnati, Ohio), K. Brenner, R. Angelotti, and H. E. Hall. Serological studies of types A, B, and E botulinal toxins by passive hemagglutination and bentonite flocculation. J. Bacteriol. 91:967-974. 1966.-Formalinized sheep red blood cells (SRBC), sensitized with types A, B, and E botulinal toxoids and toxins by bis-diazotized benzid...

Cement bentonite interactions need to be studied since they will occur in deep geological repositories.They are specifically relevant in the clay host rock reference concept. The reactivity of a Mg-homoionicFEBEX bentonite was studied at 60 oC in contact with a young cement water characterized by the leachingof alkaline hydroxides (K/Na 4/1 –OH, pH = 13.5 at 25 oC) and with an e...

Changes in blood concentrations of ionized calcium and total calcium were measured in broiler breeder hens (42 wk old) relative to egg cycle and environmental temperatures. Two environmental temperature treatments were used: 1) temperature cycled daily from a low of 10 C at 0300 h to a high of 25 C at 1600 h; and 2) temperature cycled from a low of 21 C at 0300 h to a high of to a high of 39 C ...

The present study was carried out to investigate the effects of high dietary calcium and low phosphorus on urinary system of broiler chicks. A total of 90 (day-old) broiler chicks were divided into three equal groups A, B and C. The chicks were reared for 42 days on three experimental rations. Calcium:phosphorus ratio in the feed for groups A, B and C was maintained as 1:0.5 (control), 2:0.5 an...

Studies on changes of unfrozen water content in calcium bentonite from Slovakia, with various concentrations copper ions, were carried out using the method differential scanning calorimetry (DSC). In this study, influence molar concentration copper(II) chloride solution (1 M, 0.5 0.25 0.1 M), used to saturate clay, was analyzed, as well impact ions contained and how affects versus temperature. ...