THE EFFECT OF MALACCA LEAVES (Phyllantus emblica) ETHANOLIC EXTRACT ON Plasmodium falciparum GROWTH IN VITRO

The aim of this research was to find out in vitro antiplasmodium activity of Malacca leaves (Phyllantus emblica) ethanolic extract against Plasmodium falciparum growth. In this study, Plasmodium culture contained 5% parasitemia in ring stage was cultured using candle jar method and antiplasmodial activity test was carried out using microculture. The treatments were divided into 7 groups with four repetitions. K1 as negative control group was given Roswell Park Memorial Institute (RPMI), while K2 as positive control group was given artesdiaquine. Groups K3, K4, K5, K6, and K7 group was added with 100 µg/mL, 75 µg/mL, 50 µg/mL, 25 µg/mL, and 5 µg/mL of Malacca leaves ethanolic extract, respectively. Antiplasmodial activity was determined by inhibition concentration of 50% parasite growth (IC50). The data were analyzed using ANOVA and followed by Duncan test. The average of parasitemia level in group K1, K2, K3, K4, K5, K6, and K7 were 55.25±15.62, 8.50±2.52, 8.50±3.00, 9.25±0.95, 9.00±2.70, 9.79±2.06, and 10.75±2.22, respectively. The average of inhibition percentage in group K1, K2; K3; K4; K5; K6; and K7 were 0.00±0.00%, 84.62±4.55%; 84.62±5.43%; 83.26±1.73%; 83.71±4,90%; 82.35±3,73%; and 80.54±6.83%, respectively (P0.01). The results showed that the administration of malacca leaves ethanolic extract significantly affect (P0.01) the inhibition of Plasmodium growth as compared to group K1 (negative control). Probit analysis reveals the IC50 value was 3.889 µg/mL. In conclusion, all doses of malacca leaves ethanolic extract used in this study was able to inhibit Plasmodium falciparum growth with IC50 value was 3.889 µg/mL

Genome wide association mapping of grain arsenic, copper, molybdenum and zinc in rice (Oryza sativa L.) grown at four international field sites

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The development of a protoplanetary disk from its natal envelope

Class 0 protostars, the youngest type of young stellar objects, show many signs of rapid development from their initial, spheroidal configurations, and therefore are studied intensively for details of the formation of protoplanetary disks within protostellar envelopes. At millimetre wavelengths, kinematic signatures of collapse have been observed in several such protostars, through observations of molecular lines that probe their outer envelopes. It has been suggested that one or more components of the proto-multiple system NGC 1333-IRAS 4 (refs 1, 2) may display signs of an embedded region that is warmer and denser than the bulk of the envelope(3,4). Here we report observations that reveal details of the core on Solar System dimensions. We detect in NGC 1333-IRAS 4B a rich emission spectrum of H2O, at wavelengths 20-37 mu m, which indicates an origin in extremely dense, warm gas. We can model the emission as infall from a protostellar envelope onto the surface of a deeply embedded, dense disk, and therefore see the development of a protoplanetary disk. This is the only example of mid-infrared water emission from a sample of 30 class 0 objects, perhaps arising from a favourable orientation; alternatively, this may be an early and short-lived stage in the evolution of a protoplanetary disk.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/62894/1/nature06087.pd