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[Effect of certain methods of sterilization on the quality of dental instruments].

Comparative investigations of the sterilizing action produced on the stomatological instruments by 4 chemical bactericidal agents and hot air tend to give preference to sterilization with a 2% solution of glutamic acid in a combination with a 70% isopropyl alcohol at a 45 minutes long exposure. Such a sterilization does not cause any corrosion of the instruments and reduces to a lesser degree the resistance of the cutting edges than in the case of sterilization with hot air.

1-Propanol↗
PubMed2003

[Modification of Carazzi alum hematoxylin compounding].

This investigation was aimed at the improvement of the compounding of alum hematoxylin. The advantages and disadvantages of the prevalent versions of Carazzi alum hematoxylin compoundings are analyzed. A novel modification of the Carazzi hematoxylin compounding is proposed, which is optimal for hematoxylin and eosin staining and for counterstaining of immunocytochemical preparations.

Coloring Agents↗
PubMed1992

Iodine-enriched milk in goiter endemics.

Researches carried out at Cîmpulung-Lereşti-Lăicăi from the north of the Argeş County demonstrated an environmental iodine-deficiency that caused thyroid hypofunction in animals and, consequently, a decrease in the iodine level in the products of animal origin. Administration of KI, KIO3 or of sea weeds powder in the cows nutrition corrected the thyroid function, the quantitative increase in milk production and enrichment of milk in iodine.

Animals↗
PubMed1989

Mechanisms responsible for increasing immunoreactivity of apolipoprotein A-I with storage: the role of oxidation.

Atherogenesis has been linked to low concentrations of high-density lipoprotein and its principal carrier protein, apolipoprotein (apo) A-I, in serum. We measured apo A-I by enzyme-linked immunosorbent assay, using polyclonal antiserum raised against purified apo A-I and conjugated to peroxidase. During storage at 4 degrees C and above, the immunoreactivity of apo A-I increased so that measured values in stored serum were difficult to interpret. The immunoreactivity of serum apo A-I also increased substantially (up to 50-fold) during exposure to NaIO4. This increase was apo A-I concentration dependent, was linearly dependent on the concentration of NaIO4 up to 200 mmol/L at pH 7.4 and 25 degrees C, and was not ascribable to nonspecific binding of antibody-peroxidase conjugate to the reaction wells. Treatment with NaIO4 caused apo A-I immunoreactivity to increase to a peak or plateau, then gradually decline. In 100 mmol/L NaIO4 (pH 7.4, 25 degrees C), this plateau occurred 30-60 min after oxidation commenced. When frozen serum and stored nonfrozen serum were both oxidized with NaIO4 under the same conditions, the apo A-I from the frozen serum had a significantly (P = 0.0004) greater increase in immunoreactivity. Sera from different patients with different apo A-I concentrations did not have proportionately increased immunoreactivity after treatment with NaIO4. Our findings suggest that the increase in apo A-I immunoreactivity on storage at 4 degrees C or higher involves atmospheric oxidation, and they raise the possibility of in vivo oxidized and nonoxidized forms of apo A-I.

Apolipoprotein A-I↗
PubMed1987

Preliminary characterization of an inhibitory activity of fetal bovine serum on the infectivity of rotavirus strain SA-11.

In the present work we studied non antibody inhibiting activity present in fetal bovine serum and active to Rotavirus infectivity and growth in cell cultures. This inhibitor was revealed by an in vitro neutralization test and characterized by gel filtration and chemical and enzymatic treatments. Furthermore, commercial preparations of bovine serum proteins were tested for inhibitory activity. Our results show that serum inhibition is partially resistant to trypsin and neuraminidase treatments but completely destroyed by KIO4. A similar activity was observed in a commercial serum bovine fraction containing predominantly alpha-globulins. These results seem to indicate that glycoproteins, and their glucidic components are the molecules predominantly involved in serum inhibition towards Rotavirus infectivity.

Animals↗