ABSTRACT
The antibacterial activity of the hexane, ethyl acetate and methanol extracts of the flowers, leaves and stems of Gnaphalium oxyphyllum var. oxyphyllum, G. liebmannii var. monticola and G. viscosum was investigated. The hexane extracts showed in all cases the higher inhibitions, G. oxyphyllum flower extract exhibiting the wider spectrum of activity.
Subject(s)
Anti-Bacterial Agents/pharmacology , Asteraceae , Bacteria/drug effects , Plant Extracts/pharmacology , Diterpenes/pharmacology , Flavonoids/pharmacology , Humans , Microbial Sensitivity Tests , Plant Leaves/chemistry , Plant Stems/chemistryABSTRACT
The purpose of this study is to evaluate the efficacy of the simplified method to detect neurological morbidity in newborn and to estimate the predictive parameter, i.e. sensitivity, specificity and predictive value. The sample consisted of 100 newborn infants from the Maternity Clinic of Hospital Regional Docente Trujillo-Perú, during the period from March to May 1990. All infants were born full-term, of normal delivery and Apgar score of greater than or equal to 7 at one minute, and no congenital malformation were present. Each one of the newborn was evaluated with a complete neurologic examination and the simplified method. Previously, the effects of population variables had been evaluated: the mean birth weight was 3277 g. (S.D. 435). Seventy one percent of the infants were between 38.5 and 39.5 weeks of gestational age. Eighty five percent of cases, showed on Apgar score from 8 to 10. The results allowed to determine that the sensitivity of the rapid neurological assessment was 0.70 specificity 0.75 and predictive value 0.75 (P less than 0.01). These findings suggest the usefulness and convenience of the method to detect neurological morbidity in full-term newborn infants.
Subject(s)
Neonatal Screening/methods , Nervous System Diseases/diagnosis , Neurologic Examination/methods , Apgar Score , Female , Gestational Age , Humans , Infant, Newborn , Male , Predictive Value of Tests , Sensitivity and Specificity , Time FactorsABSTRACT
Results from qualitative and quantitative evaluation of some chemical constituents, particularly phenols and volatile terpenes, from juvenile stages of three primary species belonging to the perennial rain forest are presented. The degree of infection and the time of the year were taken into account. TLC, GC, and simple chemical methods were used to estimate differences among components. Biological assays were conducted to evaluate fungicide potential of the extracts from studied plants. In general terms, the results show significant differences in the chemical composition of the species studied (Nectandra ambigens, Omphalea oleifera, andLicaria alata) related to the time of the year and the degree of infection. These differences can be related as well to their intrinsic resistance to infection and ability to grow to the adult stage.
ABSTRACT
The effects of corn pollen and aqueous leachates of pollen upon the radicle growth ofBidens pilosa, Cassia jalapensis, andRumex crispus are shown. Extractions of pollen with various solvents and methods were carried out so as to assess its active principle and its effect uponC. jalapensis. The preliminary steps to separate and identify the allelopathic compounds of the sonicated and macerated pollen extracted with methylene chloride are described. The strongest inhibitory effect was produced by the hexane fraction. The allelopathic effect of corn pollen upon the growth ofC. jalapensis in several substrates is shown. The possible structure of some of the active fractions is discussed as well as the possibility that the allelopathic potential of pollen might actually occur in nature.
