Stratiotes Research Articles

Evaluation of Metal Affinity of Lanthanum Using Different Alternative Bio/adsorbent Materials

Over the past few decades, the removal and recovery of Lanthanum (La) has received great economic and environmental interest due to its high market prices, along with several industrial applications. Recently, with the increasing demand for rare-earth compounds with high purity, the separation and purification of these elements has gained expressive attention. The bio/adsorption has been considered an alternative for the recovery of these elements, due to their simplicity, low cost and efficiency in the recovery of rare earth ions in low concentrations. In this study, particles produced from a blend of sericin and alginate crosslinked by proanthocyanidins (SAPAs); calcined Verde-lodo clay and calcined Bofe clay; aquatics macrophytes Salvinia natans and Pistia Stratiotes, were used to remove lanthanum ion from aqueous solutions. The simulation of speciation diagrams as functions of pH was performed using Hydra/Medusa software and the pH was adjusted and controlled during the experiments to values between 4.5 and 5.0. The affinity tests study were performed in batch systems at concentration of 1.0 and 3.0 mmol L-1 La3+. In the experiments with concentration of 1.0 mmol L-1 La3+, all bio/adsorbents evaluated presented a high removal percentage (>96%). The removal percentage and adsorption capacity of lanthanum ion from aqueous solution by bio/adsorbents materials varied between 53.47 to 98.26% and 0.154 to 0.243 mmol g-1 at the concentration of 3.0 mmol L-1 La3+, respectively. The results indicated that the material with the greatest values of removal percentage and adsorption capacity for lanthanum ions was the particles of sericin and alginate crosslinked by proanthocyanidins (82.66 % and 0.243 mmol g-1).

Karakteristik Kimia dan Aktivitas Antioksidan Kombucha dari Tumbuhan Apu-apu (Pistia stratiotes) Selama Fermentasi

The purpose of this research was to utilize water lettuce (Pistia stratiotes) as raw material of kombucha drink and was to investigate the effects of fermentation time on chemichal characterictics and antioxidant activity of water lettuce (Pistia stratiotes) leaves kombucha. This research used randomized block design (RBD) consisted of 1 factor treatment which was fermentation time (1,4,8 and 12 days) with 3 replications. The variables observed were total sugar content, pH, total acidity, alcohol, antioxidant activity use DPPH method and sensoric analysis on appereance, colour, flavor, and taste of the find product. The result showed that fermentation time gave significant effect on chemichal analysis (total sugar content, pH, total acidity, alcohol), antioxidant activity and sensoric analysis (appereance, colour and taste), but no effect on flavor was observed.

Ethnobotanical survey and phytochemical analysis of medicinal plants used for the treatment of hyperprolactinemia in Lagos State, Nigeria

Ethnobotanical survey and phytochemical screening of medicinal plants used for the treatment of hyperprolactinemia among women in Lagos State, Nigeria was carried out using oral interviews (without questionnaire) and standard screening procedures. Ethnomedicinal data was gathered from herb sellers, herbal medicine practitioners and elderly people in the rural parts of the state. The collected data included the names of the plants, the parts used, mode of preparation, dosage, and administration of the medicinal plants. 13 plant species belonging to 10 families were identified and selected. They are: Senna alata L., Jatropha gossypifolia L., Uvaria chemae P. Beauv., Morinda lucida Benth., Anthocleista djalonesis Chev., Heliotropium indicum L., Hoslundia opposita Vahl., Nymphea lotus L., Pistia stratiotes L., Vitex agnus L., Ocimum sanctum L., Ocimum gratissimum L. and Xylopia aethiopica (Dunal) A. Rich. Asteraceace has the highest number of plant species used followed by Annonaceace. N. lotus and P. stratiotes were the most frequently mentioned and highly recommended of all the species. The plant parts used for the treatment are the leaves, bark and roots which are prepared by decoction, infusion or taken in powdered form. Majority of the plant materials are taken orally and/or used for bathing. The aqueous and acetone extracts of the medicinal plants implicated were screened using standard laboratory procedures for the presence of secondary metabolites. The screening revealed the presence of alkaloids, tannins, saponins, phenols, and proanthocyanidins. Key words: Ethnobotanical survey, medicinal plants, phytochemicals, hyperprolactinemia.

Моделювання інвазійного поширення Pistia stratiotes (Araceae) на основі ГІС-аналізу кліматичних факторів

Моделювання інвазійного поширення Pistia stratiotes (Araceae) на основі ГІС-аналізу кліматичних факторів

Trade-off responses of the clonal plant water lettuce (Pistia stratiotes L.) to the allelopathy of Crofton weed (Eupatorium adenophorum Spreng).

Allelopathic interference is considered an ecologically acceptable and effective means of biological control of invasive weeds, but little is known about phenotypic plasticity and the physiological integration of clonal plants in response to allelopathic interference. We used the clonal invasive aquatic water lettuce as a target for allelopathic control by spraying it with a crofton weed filtrate that contained strong allelochemicals. The growth of single-parent water lettuce was inhibited early on in the experiment when adult leaves gradually faded and new leaves grew slowly. However, as offspring ramets grew, the total number of ramets, leaf coverage, and biomass were all significantly greater in allelopathic treatments than in the control, although individual offspring ramets were smaller on average than in the control. This is an indication that the effects of allelopathic control on the water lettuce are: overcompensation in growth, and a trade-off between average size and the number of offspring. Th...

Aquatic weed classification, environmental effects and the management technologies for its effective control in Kerala, India

Abstract: Aquatic weeds, the unabated plants completing life cycle in water, are a serious menace to the environment. Dense colonies of aquatic weeds are observed in the southern regions of Kerala which mainly includes Ernakulam, Kottayam, Idukki and Alappuzha districts. The noxious aquatic weeds invade inland water masses, estuaries inshore regions of seas and are now abandoned. The rapid and excessive growth of aquatic weeds in varied and wide environmental condition limits the sustained performance of many drainage and irrigation system, reducing the productivity of agricultural land. Aquatic weeds are classified into emergent, floating and submerged weeds according to the various habitats. Many species are found in Kerala which were originally introduced into botanical gardens. The major aquatic weeds found in Kerala include Salvinia spp., Eichhornia crassipes, Pistia stratiotes, Alternanthera spp., Azolla, common duckweed, and Hydrilla verticillata. Reduction or elimination of aquatic weeds is possible through well planned management strategies which includes preventive and control (biological, physical, chemical, eco-physiological) measures. A successful weed control program depends on the resources available, the weeds present and the ability to carry out effective control methods. Operational research and /or pilot projects have to be initiated in the problematic areas on long term basis, using technical recommendations derived from research experiments. Keywords: aquatic weeds, classification, effects, management technology DOI: 10.3965/j.ijabe.20120501.010 Citation: Jayan P R, Nithya Sathyanathan. Aquatic weed classification, environmental effects and the management technologies for its effective control in Kerala, India. Int J Agric & Biol Eng, 2012; 5(1): 76

STUDIES ON NEOTROPICAL SCARITINI. II. FORCIPATORINA AND CLIVININA LIMITS, WITH DESCRIPTION OF NEW GENERA (COLEOPTERA: CARABIDAE)

AbstractThe various characteristics used to describe Forcipatorina and to fix its limits with Clivinina are analyzed and checked against the different genera concerned. New definitions for the subtribes and a key to the genera included in Forcipatorina are given. It is shown that the genus Stratiotes Putzey s is heterogenous and must be divided into several genera, two of which are described as new: Kultianella and Whiteheadiana.