The seed dormancy limits seedling production and the potential for using them. This study aimed to determine the best method for breaking dormancy in seeds of Mimosa hostilis Benth. and Bauhinia cheilantha (Bong.) Steud. The experiment was conducted at the Laboratory of Food Science, State University of Alagoas (UNEAL) Campus II, located in the municipality of Santana do Ipanema, Alagoas State, Brazil. Five treatments were studied (T): T1 – immersion in water at 100 ° C until cooling thereof; T2 – immersion in water at 50 ° C until cooling thereof; T3 – immersion in sulfuric acid for 5 minutes, followed by washing in water for 10 minutes; T4 – mechanical scarification by sandpaper for 2 minutes, and T5 – Witness. Where it came to evaluating the germination speed index (GSI) and germination percentage (G%). Data were subjected to analysis of variance and the means compared by Tukey test at 5% significance level. The immersion in sulfuric acid was the best method to break seed dormancy of Mimosa Hostilis Benth., now for Bauhinia cheilantha bong. Steud in the chiseling was the best method for breaking dormancy.
The experiment was conducted at Isfahan East Waste Water Treatment in 2011 growing season by using a randomized complete block design with three replications. The treatments were managed for irrigation: municipal water, untreated waste water and treated waste water. Results showed irrigation with untreated and treated waste water had significantly higher biomass (86.00 t/ha) than municipal water (66.00 t/ha). Highest ethanol yield (6540 l/ha) was obtained for sweet sorghum irrigated with raw waste water. Both pH and P was accumulated in the soil irrigated with untreated and treated waste water. At the end of growing season the amount of Cd, Pb and Ni were accumulated in these soils. The amount of measured heavy metals in sweet sorghum grain, leaf and stem were significantly higher in untreated waste water than both municipal water and treated waste water. Number of coliform in untreated waste water was significantly higher than treated and municipal water. The number of coliform in grain, leaf and stalk for surface non- sterilized was higher than surface sterilized but it was less than 100 MPN 100 ml-1. Based on the results, in order to produce bioethanol without accumulation of heavy metals in the soil, it is suggested to plant sweet sorghum and irrigated with treated waste water.
The outstanding features of Orange-fleshed sweet potatoes (OFSP) are the nutritional and sensory versatility in terms of its micronutrient contents and wide range of colours, taste and mouth feel. This study was carried out to evaluate the organoleptic properties and proximate composition of some Orange-fleshed sweet potato genotypes viz: Umuspo1, Umuspo3 and Ex-Igbariam. Estimation of moisture, ash, crude fibre, fat, protein and energy value was conducted using standard AOAC procedures. Twenty-eight sensory assessors were used to evaluate some sensory (organoleptic) attributes such as colour, aroma, taste, mouth feel and general acceptability of chips and shake made from the OFSP genotypes. Proximate analysis result showed that moisture content varied from 68.137 – 61.235%, 4.23 – 5.54% for protein, 0.542 – 1.265% for fat, 1.22 -2.25% for crude fibre, and 1.189 – 1.677 % for ash. The energy value ranged from 392.906 %- Umuspo1 to 390.74%-Ex-Igbariam. % moisture content and dry matter differed significantly with varieties (P < 0.05). The highest values of vitamin C, B3 and B2 were 24.03 mg/g (Umuspo3), 0.324 mg/g (Umuspo3) and 0.028 mg/g (Ex-Igbariam), respectively. The experimental OFSP genotypes had higher value of calcium than the other mineral content. Chips and shake prepared from the experimental OFSP genotypes were generally accepted for consumption and could serve for use as chips and shake.