Showing papers on "Sterculia foetida published in 2017"
TL;DR: In this article, the effect of the reaction time on the acid value of the esterified Sterculia feotida oil is also investigated and it is found that acid value is 0.76 and 0.85 µm KOH/g for the ultrasound and infrared techniques, respectively, at a reaction time of 60min.
Abstract: In this study, biodiesel production using ultrasound and infrared techniques is introduced. The ultrasound and infrared techniques are more efficient for biodiesel production since they improve the mass transfer between the immiscible reactants, increase chemical reactions, and decrease the reaction time and energy consumption. The effect of the reaction time on the acid value of the esterified Sterculia feotida oil is also investigated and it is found that the acid value is 0.76 and 0.85 mg KOH/g for the ultrasound and infrared technique, respectively, at a reaction time of 60 min. In addition, it is found that the biodiesel yield obtained from the ultrasound technique is higher (99.41%) compared to the infrared technique (98.55%) at a reaction time of 60 min. The KOH catalyst is analyzed for both of these techniques and it is found that the ultrasound technique gives faster absorbed reaction compared to the infrared technique. Hence, it can be concluded that the ultrasound and infrared transeste...
52 citations
01 Jun 2017
TL;DR: In this paper, a model of adsorption of Cr6+ on to activated carbon prepared from Sterculia foetida dried seed shells under different drying techniques namely sun, oven, and microwave drying (450W, 600W, 900W power).
Abstract: Modeling of adsorption of Cr6+ on to activated carbon prepared from Sterculia foetida dried seed shells under different drying techniques namely sun, oven, and microwave drying (450W, 600W, 900W power). Optimization of process parameters such as pH, adsorbent dosage (g/ml), temperature (°C), contact time (min) were evaluated using Central Composite Rotatable Design (CCRD) of Response Surface Methodology (RSM). For batch adsorption studies at pH 3, adsorbent dosage of 1.5 g/ml, temperature 35°C and contact time 90 min were found to be optimum for the system under consideration and Microwave Activated Carbonized Sterculia foetida (MACSF) at 450W was found to be best suited for the adsorption of Cr+6 ions. The system was found to follow Langmuir type monolayer adsorption for the given operational parameters. SEM analysis was used to study the surface morphology of the carbon samples and the effect of pretreatment on carbonization.
11 citations
DOI•
23 Dec 2017
TL;DR: In this paper, the effect of media treatment and sulfuric acid concentration on germination of seed kepuh (Sterculia foetida Linn) was investigated in a randomized block design with 2 factorials, 3 repetitions and 24 treatment combinations.
Abstract: Kepuh ( Stercukia foetida Linn) is a species that can serve as the greening plants for soil conservation and hydrology. This study aims to determine the effect of media treatment and sulfuric acid concentration on germination of seed kepuh ( Sterculia foetida Linn). The study was conducted from March to April 2017. Experiments were performed in a randomized block design with 2 factorials, 3 repetitions and 24 treatment combinations. The results showed, the combination of the media treatment and the concentration of sulfuric acid on the percentage of germination, the rate of germination, and the kepuh seed vigor index was in the A4B3 treatment. Where A4B3 treatment using cocopeat medium with seeds first soaked in 15% sulfuric acid solution for 15 minutes gives the best results.
3 citations
12 Feb 2017
TL;DR: The aims of this study are to prove the effectiveness of Sterculia foetida in lowering cholesterol, triglyceride and reduce the amount of foam cell s on high-fat- diet induced rats, and to reduce the amounts of foam cells on aorta.
Abstract: Cardiovascular disease causes the highest mortality rate in the world. Atherosclerotic plaque is the most common etiology of cardiovascular disease. High levels of cholesterol in circulation is the pathophysiology of atherosclerosis formation. A therosclerosis risk can be lowered to 20-40% with statins. Statins are effective in lowering total and LDL cholesterol, but these drugs have been reported to cause side effects . Therefore, it needed an alternative medicine to prevent the process of atherosclerosis using kepuh leaves (Sterculia foetida) . Flavonoids contained in Kepuh leave s improve lipid profiles. Th e aims of this study is to prove the effectiveness of Sterculia foetida in lowering cholesterol , triglyceride and reduce the amount of foam cell s on high-fat- diet induced rats . The research design is quasi -experimental with post test only design . Animals are grouped into normal group, negative control group and three treatment groups that were given kepuh leaves extract at the dose of 200 mg/kgBB, 400 mg/kgBB, and 800 mg/ kgBB. Rats were given high-fat diet of initial intravenous adrenaline injection 0.006 mg/200 gBB and duck egg yolks 5 g/kgBB for 21 days. Cholesterol and triglycerides were measured by enzymatic methods and aortic tissue stained with HE . ESf reduce cholesterol significantly and reduce the amount of foam cells on aorta . Keywords : cholesterol, triglyceride , kepuh leaves, foam cell, high-fat-diet
3 citations
TL;DR: The phytochemical screening revealed the presence and absence of fifteen secondary metabolites (carbohydrates, tannins, saponin, flavonoids, alkaloids, quinones, terpenoids, glycosides, triterpenoid, phenols, coumarins, proteins, cardiac glycoside, steroids, phytosterols) from all the five extracts in varying concentrations.
Abstract: Sterculia foetida is a soft handsome woody tree with various pharmacological properties and they are most prevalently found in India, Thailand, Indonesia, Ghana, and Australia. The biochemically active compounds present in the plant possess good medicinal properties which have been already reported in several research papers. The present study was designed to screen the biochemically active compounds present in the leaves of Sterculia foetida. Qualitative analysis were performed using five different solvents (hexane, chloroform, methanol, ethyl acetate and aqueous) by using various standard protocol for each specific metabolite. The phytochemical screening revealed the presence and absence of fifteen secondary metabolites (carbohydrates, tannins, saponin, flavonoids, alkaloids, quinones, terpenoids, glycosides, triterpenoids, phenols, coumarins, proteins, cardiac glycosides, steroids, phytosterols) from all the five extracts in varying concentrations. Screening studies finally revealed the presence of high content of five secondary metabolites in methanol leaves extract when compared with other four solvent leaves extracts.
1 citations
TL;DR: Evaluating the leaf primary metabolism in two woody species, Sterculia foetida and Bombacopsis glabra, found that both species present potential to be planted in Brazilian Northeast, where water deficit and salt stress are challenging for annual crops.
Abstract: This study aimed to evaluate the leaf primary metabolism in two woody species, Sterculia foetida and Bombacopsis glabra . Both species have seeds rich in oil and they are largely found in regions with irregularities in water availability. Seedlings were grown in a greenhouse from seeds. At 140 days after emergence, 50% of the plants were subjected to salt stress for 23 days, daily receiving 100 mM of NaCl solution. In both species, leaf stomata conductance and water potential decreased quickly under salt stress. The two species showed different strategies in photosynthetic pigment concentration and components of nitrogen metabolism. S . foetida kept the pigment concentration unchanged after 23 days of stress, while B . glabra increased concentration of chlorophyll a and carotenoids. S . foetida showed a high leaf concentration of K + in stressed plants and a Na + /K + ratio without differences when compared to control. Thus, S . foetida presented a better ionic balance, while B . glabra invested in photoprotection. Therefore, both species present potential to be planted in Brazilian Northeast, where water deficit and salt stress are challenging for annual crops.
1 citations
TL;DR: In this paper, the authors focused on the adsorption of lead using carbonized shells of the fruit of Sterculia foetida, and the maximum lead removal percentage was observed to be 96.68 % at an adsorbent dosage of 0.6 g per 50 ml of solution, pH 5, initial lead concentration of 65 mg/l and contact time of 110 minutes.
Abstract: Activated carbon prepared from agricultural wastes has often proved to be effective in the removal of heavy metals from industrial wastewaters. This study has focused on the adsorption of lead using carbonized shells of the fruit of Sterculia foetida. The initial concentration of lead ions was varied and the influence of contact time, adsorbent dosage, pH and initial metal concentration on adsorption process were studied. The temperature and agitation speed were kept constant at 27±2 oC and 200 rpm respectively. The maximum lead removal percentage was observed to be 96.68 % at an adsorbent dosage of 0.6 g per 50 ml of solution, pH 5, initial lead concentration of 65 mg/l and contact time of 110 minutes.