RESUMEN
We report a high statistics measurement of Upsilon production with an 800 GeV/c proton beam on hydrogen and deuterium targets. The dominance of the gluon-gluon fusion process for Upsilon production at this energy implies that the cross section ratio, sigma(p+d-->Upsilon)/2sigma(p+p-->Upsilon), is sensitive to the gluon content in the neutron relative to that in the proton. Over the kinematic region 0
RESUMEN
The presence of a unique population of Lagoa crispata, puss caterpillar, in western Oklahoma is reported. A detailed microscopic examination shows the structure of the L. crispata spines resemble the type 4 spines described by [Kawamoto, F., Kumada, N., 1984. Biology and venoms of lepidoptera. In: Tu, A.T. (Ed.), Handbook of Natural Toxins, Insect Poisons, Allergens and other invertebrate venoms, vol. 2, pp. 291-332 (ch. 9)]. The major food source of L. crispata are the leaves of oak (shin oak). The high tannin content of this food source results in spine extracts high in oak tannins. These extracts have activity but enzyme and toxin activity is lost with time. The gel filtration protein fractions are colored from brown to yellow and are inactive as enzymes or toxins. No hyaluronidase, protease or phosphohydrolase activity is detected in these protein fractions. The life cycle shows these caterpillars have 6 instars. Characterizations and annual emerging times of each instar are included.
Asunto(s)
Venenos de Artrópodos/química , Cabello/química , Insectos/química , Adenosina Trifosfatasas/química , Adenosina Trifosfatasas/aislamiento & purificación , Aminoácidos/análisis , Animales , Venenos de Artrópodos/enzimología , Venenos de Artrópodos/toxicidad , Electroforesis Discontinua , Endopeptidasas/química , Endopeptidasas/aislamiento & purificación , Femenino , Cabello/enzimología , Hialuronoglucosaminidasa/química , Hialuronoglucosaminidasa/aislamiento & purificación , Larva , Estadios del Ciclo de Vida , Masculino , Microscopía Electrónica , Microscopía Electrónica de Rastreo , Oklahoma , Conejos , Ratas , Fijación del TejidoRESUMEN
There is a need for pharmacological agents for the treatment of pulmonary edema associated with the adult respiratory distress syndrome. Therefore, we examined the effects of isozyme-selective cyclic AMP phosphodiesterase (cAMP PDE) inhibitors, as well as aminophylline and dexamethasone, on the pulmonary edema, protein leakage into the airways and airway neutrophilia induced by aerosolized lipopolysaccharide (LPS) in intact guinea pigs. Twenty-four hours after LPS exposure lung wet/dry weight ratios increased from 4.9 +/- 0.004 to 5.8 +/- 0.02. Rolipram (PDE4 selective), CI-930 (PDE3 selective), aminophylline and dexamethasone (given p.o. 1 hr before and 4 hr after LPS exposure) inhibited pulmonary edema formation with ED50 values of 1.7, 0.5, 31 and 2.8 mg/kg, respectively. Maximum inhibition occurred with rolipram at 10 mg/kg (70 +/- 17%), CI-930 at 10 mg/kg (101 +/- 4%), aminophylline at 50 mg/kg (88 +/- 14%) and dexamethasone at 3 mg/kg (64 +/- 6%). Denbufylline and milrinone also inhibited pulmonary edema formation at 10 mg/kg i.p., supporting the inhibition of PDE4 and PDE3 as the mechanisms of action of rolipram and CI-930, respectively. Rolipram, CI-930, aminophylline and dexamethasone (at maximum doses for inhibiting pulmonary edema) inhibited the 3-fold increase in bronchoalveolar lavage albumin concentration 24 hr after LPS exposure (42 +/- 14%, 98 +/- 2%, 70 +/- 9% and 53 +/- 13%, respectively). However, none of these compounds (at maximum doses for inhibiting pulmonary edema) inhibited the corresponding 400-fold increase in lavage neutrophil counts.(ABSTRACT TRUNCATED AT 250 WORDS)