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There are no data available regarding the bronchospasmolytic activity and toxicity of water extract of Coptosapelta flavescens Korth root (WECFR). Therefore, this study aimed to determine: a. the in vitro tracheospasmolytic effect of WECFR; b. safety of WECFR using the brine shrimp lethality test (BSLT) and immobilization of Daphnia magna larvae (IDL). In study, a guinea pig tracheal ring was contracted with methacholine and cumulative doses of WECFR solution were administered. A dose-response curve (DRC) was plotted of the percentage of the tracheal ring relaxation response. To test whether the relaxation mechanism occured through stimulation of beta2-adrenergic receptors, the tracheal ring was incubated with propranolol. Data analyzed using analysis of variance, showed that the DRC of WECFR was obtained with p < 0.05 compared to the DRC of control, indicating that WECFR had a tracheospasmolytic effect. The DRC for propranolol-blocked WECFR did not shift to the right compared to the DRC of WECFR, confirming that the relaxation mechanism did not occur through the beta2-adrenergic receptors. Study b. assessed safety using BSLT and IDL. After exposing the larvae to WECFR and control for 24 and 48 h, respectively, the number of dead larvae was counted. Data analyzed using Probit program, showed that the lethal dose 50 of WECFR towards Artemia salina and Daphnia magna larvae was > 1000 ppm, which means that it was not toxic. This studies demonstrate that WECFR exhibits tracheospasmolitic effect, but not through beta2-adrenergic receptors; WECFR is safe for Artemia salina and Daphnia magna larvae.

Tarap (Artocarpus odoratissimus Blanco) is one of the plants in the tropics that are consumed by dayak tribe in East Kalimantan. Toxicity tests on seeds and bark have been done but there is no data regarding the acute toxicity of Artocarpus odoratissimus Blanco seeds and flesh of fruit causing the need for acute toxicity tests. This Research to know the acute toxic effects of tarap (Artocarpus odoratissimus Blanco) seed and flesh extracts on larvae of Daphnia magna. Tarap seeds and flesh (Artocarpus odoratissimus Blanco) was taken from dayak market in Samarinda, is East Kalimantan, Indonesia. The seeds and flesh of the tarap fruit are extracted by maceration with ethanol solvent. An acute toxicity test was performed by exposing Dapnia magna larvae aged ≤ 24 hours with a solution of the experimental group and the control group for 48 hours. Toxicity test results are expressed in percentage of immobilization of larvae of Daphnia magna calculated by probit test to obtain EC50 (Half maximal effective concentration) values. Extracts are toxic if the EC50 value > 1000ppm. EC50 Ethanol extract of tarap seeds obtained values ( 3922,301 ± 324,590 ) for EC50 24h and ( 2964,498 ± 412,498 ) for EC50 48h. The EC50 value of ethanol extract from flesh of tarap fruit is ( 12224.514 ± 2186. 899 ) EC50 24h and ( 6165,235 ± 1940,006 ) EC50 48h.Ethanol extract of tarap fruit and flesh is non toxic to larvae of Daphnia magna.

Background: aromatic ginger rhizome (Kaempferia galanga L.) is a member of Zingiberaceae family, has been known to have an antibacterial effect is used for everyday cooking spices, but the synergistic effect on broad spectrum antibiotics was unknown. Objective: this research was conducted to find out the synergistic effect of Kaempferia galanga L. Rhizome extract (KGR) on some broad-spectrum antibiotics against gram positive and negative bacterial pathogens in vitro. Method: KGR was taken from farmers in Samarinda City, East Kalimantan Province, Indonesia. Extraction by maceration with ethanol solvent. Antibacterial activity test of KGR ethanol extract, antibiotic and synergistic effect using Mueller-Hinton agar, Kirby-Bauer disc diffusion method on ampicillin, cefuroxime, chloramphenicol, ciprofloxacin, and meropenem antibiotics against Staphylococcus aureus and Escherichia coli. Results were expressed in percentage increase of the inhibition zone. Statistical test with t-test, significantly different if p