ABSTRACT
The antioxidant properties of the synthetic compound (C1)-(C8), which comprised 7 curcuminoids and a chalcone, were evaluated by two complementary assays, DPPH and ß-carotene/linoleic acid. It was found that, in general, the free radical scavenging ability of (C1)-(C8) was concentration-dependent. Compounds (C1) and (C4), which contained (4-OH) phenolic groups, were found to be highly potent antioxidants with higher antioxidant values than BHT suggesting that synthetic curcuminoids are more potent antioxidants than standard antioxidants like BHT. Using ß-carotene-linoleic acid assay, only the water-soluble 2, 4,6-trihydroxyphenolic chalcone (C5) showed 85.2 % inhibition of the formation of conjugated dienes reflecting on its potent antioxidant activity.
Subject(s)
Antioxidants/chemical synthesis , Chalcones/chemical synthesis , Curcumin/chemical synthesis , Free Radical Scavengers/chemical synthesis , Antioxidants/pharmacology , Chalcones/pharmacology , Curcumin/pharmacology , Dose-Response Relationship, Drug , Free Radical Scavengers/pharmacology , Oxidation-Reduction/drug effectsABSTRACT
The black cumin or Nigella sativa L. seeds have many acclaimed medicinal properties such as bronchodilatory, hypotensive, antibacterial, antifungal, analgesic, anti-inflammatory and immunopotentiating. This review article is an update on the previous article published on Nigella sativa L. in this journal in 1999. It covers the medicinal properties and chemical syntheses of the alkaloids isolated from the seeds of the herb.
Subject(s)
Nigella sativa/chemistry , Plant Extracts/chemistry , Plant Extracts/isolation & purification , Seeds/chemistry , Analgesics/chemistry , Analgesics/isolation & purification , Animals , Anti-Ulcer Agents/chemistry , Anti-Ulcer Agents/isolation & purification , Antineoplastic Agents/chemistry , Antineoplastic Agents/isolation & purification , HumansABSTRACT
OBJECTIVES: To evaluate the differences in environmental sound, illumination and physiological parameters in the Boekelheide Neonatal Intensive Care Unit (BNICU), which was designed to comply with current recommendations and standards, as compared with a conventional neonatal intensive care unit (CNICU). STUDY DESIGN: Prospectively designed observational study. RESULT: Median sound levels in the unoccupied BNICU (37.6 dBA) were lower than the CNICU (42.1 dBA, P<0.001). Median levels of minimum (6.4 vs 48.4 lux, P<0.05) and maximum illumination (357 vs 402 lux, P<0.05) were lower in the BNICU. A group of six neonates delivered at 32 weeks gestation showed significantly less periodic breathing (14 vs 21%) and awake time (17.6 vs 29.3%) in the BNICU as compared to the CNICU. CONCLUSION: Light and sound were both significantly reduced in the BNICU. Care in the BNICU was associated with improved physiological parameters.
Subject(s)
Facility Design and Construction , Infant, Premature, Diseases/therapy , Intensive Care Units, Neonatal/organization & administration , Lighting , Noise , Patients' Rooms/organization & administration , Humans , Infant, Newborn , Infant, Premature , Infant, Premature, Diseases/physiopathology , Nurseries, Hospital/organization & administrationABSTRACT
HYPOTHESIS: Site-specific variables that contribute to the pathogenesis of bronchopulmonary dysplasia (BPD) can be identified. OBJECTIVES: To evaluate the demographic, nutrition and growth characteristics of infants at risk for developing BPD at two neonatal intensive care units (NICUs: sites A and O). STUDY DESIGN: Records of 306 infants of < or = [corrected] 30 weeks gestational age (GA) who survived to at least 36 weeks postmenstrual age were retrospectively reviewed. Data were obtained for maternal and neonatal demographics, weights, total fluids, calories, carbohydrate, protein and fat intake at birth, 7, 14, 21 and 28 days of life. RESULTS: BPD rates were not different at the two sites. No statistical differences were noted in the incidence of maternal chorioamnionitis, pregnancy-induced hypertension or use of antenatal steroids among infants who developed BPD (n = 169) and those who did not (n = 137). White race, birth weight, respiratory distress syndrome requiring surfactant, sepsis and patent ductus arteriosus were significantly associated (all P < or =0.03) with BPD. After controlling for significant confounding variables, infants who developed BPD had significantly (P < 0.001) less weight gain, received less calories and fat in the first postnatal month. In the 26 to 28 weeks GA group, the odds of getting BPD were 5.4 (95%CI: 1.4 to 21.3) times greater for site A than site O (P = 0.017). CONCLUSION: Our analysis suggests that while some decrease in BPD can be achieved by focusing on ventilation/oxygen use, this approach is unlikely to impact on the youngest infants.
