A total of 32 Banisteriopsis caapi samples and 36 samples of Psychotria viridis were carefully collected from different plants on the same day from 22 sites throughout Brazil for phytochemical analyses. A broad range in alkaloid distribution was observed in both sample sets. All B. caapi samples had detectable amounts of harmine, harmaline and tetrahydroharmine (THH), while some samples of P. v...

No-effect concentration as well as safe concentration of mercury was evaluated by exposing Perna viridis and Mugil cephalus to 24-hour static renewal bioassay for 96-hours. The 96-hour LC50 value was 75 and 129 μg/l Hg for Mugil cephalus and Perna viridis. Juvenile mullets were more sensitive than green mussel. The safe concentration calculated were 0.75 and 1.29 μg/l Hg. The no-effect concentr...

A hypothetical molecular model of part of the D 1 protein of photosystem II, based on the analogous portion of the L subunit of the Rhodopseudomonas viridis reaction centre, has been used to study the binding of an extended hydrophobic phenylurea inhibitor (N,N-dimethyl-carbamoyl)4-amino-4'-chloro-trans-stilbene) (I) to the QB site. The inhibitor was fitted by eye into a cleft in the site, and ...

Studies of herbivorous insects have played a major role in understanding how ecological divergence can facilitate genetic differentiation. In contrast to the majority of herbivorous insects, grasshoppers as a group are largely polyphagous. Due to this relative lack of intimate grasshopper-plant associations, grasshopper-plant systems have not played a large part in the study of host-associated ...

Foxtail millet is small diploid (2n = 2x 18), one of the oldest domesticated, self-compatible, C4 Panicoid cereal grains in Eurasia. Change climatic conditions, ecological degradation, overexploitaion, and commercial cultivation has led to genetic loss landraces as well wild relatives cultivated crops. Established relations among species are prerequisites for their future breeding programs impr...

in order to identify and determine weed population in sugar beet fields, 92 fields from five counties of kermanshah province in iran were selected and evaluated at two growing stages (early may and late september) in 2014. the weed population indices were calculated by counting the number of weeds separated on othe basis of genus and species. for all fields, the latitude, longitude and altitude...

The effect in alcoholic extract of Bark of Albizzia lebbeck was studied for antifilarial activity using Setaria cervi (S. cervi) worm procured from the freshly slaughtered buffalo.We used the whole worm (w.w.) preparation and nerve muscle (n.m.) complex of Setaria cervi (S. cervi). The n.m. complex is made by stripping the cuticle of the worm. The effect was stimulant in nature in both the prep...