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Analysis of Toxaphene in Environmental Samples
Published in B. K. Afghan, Alfred S. Y. Chau, Analysis of Trace Organics in the Aquatic Environment, 2017
Veith and Lee119 examined the part played by lake sediments in toxaphene. Toxaphene was transported downward in sediment to about the 15 cm mark at a rate of 0.4 to 1.1 cm/d in three lakes studied. This toxaphene was strongly sorbed to the sediment and could not be leached off by lake water in the laboratory (flask shaking method with filtration and analysis of water and sediment separately). Hence, once sorbed toxaphene should not reenter the water column. It is unclear, however, how long the samples were stored frozen prior to analysis. In one lake, toxaphene 0 to 5 cm sediment concentration increased up to 90 ppb at the 50 d mark and decreased to 7.1 ppb 2 yr post treatment of lake for rough fish control. The 50 d level was attributed to direct sorption onto the sediment and co-deposition with toxaphene-Iadened algal blooms and other particulate matter. This did not agree with other reported toxaphene studies.
In Vitro Prostate Cancer Biomarkers on the Basis of Gelatin Matrix Incorporated Gold Nanoparticles Functionalized with Fluorescence Dye and Prostate Specific Membrane Antigen
Published in Omari V. Mukbaniani, Tamara N. Tatrishvili, Marc J. M. Abadie, Science and Technology of Polymers and Advanced Materials, 2019
K. Chubinidze, B. Partsvania, A. Khuskivadze, G. Petriashvili, M. Chubinidze
As the in vitro platform, we have used a biotissue mimicking phantoms based on gelatin matrix. Traditionally, phantoms that closely mimic the physical properties of various human tissues have been invaluable for the development and testing of medical imaging modalities. Gelatin-based materials are attractive due to their stable mechanical properties and ease of fabrication. To carry out a gelatin phantom based experiments, we used two samples prepared: (1) Gelatin matrix doped with Nb fluorescent dye and PSMA, and (2) Gelatin matrix doped with Nb fluorescent dyes, PSMA, and GNPs. The gelatin-based solution was prepared as follows: 5 gram of gelatin powder was doped and dissolved in 100 mL of deionized water embedded in laboratory flask and was left for 2 hours at rooms temperature. After that, the solution was heated to 35°C and vigorously stirred for 20 minutes to create an uniform substance. Prepared solution was divided into two parts using Petri Dishes. One was filled with a gelatin solution doped Nb/PMSA substance with next concentration: 50 mL/water-gelatin/2 × 10−5 g NB: 2.5 mL water/5.0 mg PSMA, and another one with 50 mL/water-gelatin/2 × 10−5 g NB: 2.5 mL water/5.0 mg PSMA/7.15 × 1010N GNPs/ml, dispersed in an aqueous buffer (0.02 mg/ml). Dishes were stored in a humidified atmosphere at 37°C, for 24 h in order to achieve a desired incubation rate of Nb and NB/GNPs/PSMA composites on gelatin matrix. Then solutions were cooled to about at room temperature and deposed by drop coating to the glass surfaces treated with deionized water. The coated films on substrates were stored for 24 hours at room temperature. Each sample was examined thoroughly, in order to estimate and calibrate such important parameters, as thicknesses and optimal concentrations of Nb fluorescence dyes, PSMA, GNPs (Figure 27.7).
Elimination of basic blue 9 by electrocoagulation coupled with pelletized natural dead leaves (Sapindus mukorossi) biosorption
Published in International Journal of Phytoremediation, 2021
Farhan Javed, Syed Waqas Ahmad, Amir Ikhlaq, Abdul Rehman, Faisal Saleem
Various previous research studies on the elimination of BB-9 from aqueous solution by biosorption utilize the powdered form of biosorbents. Rangabhashiyam et al. (2018) reported the biosorption of BB-9 on Carica papaya wood biosorbent in powder form with efficient removal of BB-9 of 94.50% by conducting experiments in conical flasks. Georgin et al. (2020) reported the removal of BB-9 with up to 92.2% removal efficiency achieved by using powdered berry seeds in the flask and fixed-bed column. Efficient biosorption of BB-9 on soybean hulls was reported (Cusioli et al.2020) using the powder form of biosorbent in glass vials. Siqueira et al. (2020) reported the removal of BB-9 on sugarcane bagasse utilizing powder form adsorbent in a laboratory flask. Since the powdered adsorbents give inherent drawbacks when utilized on an industrial scale such as problematic solid–liquid disengagement after treatment, clogging risk, choking, channeling of columns, and high separation cost (Dutta and Basu 2014; Asjadi et al.2016; Sacco et al.2018). Thereby the use of powdered biosorbents on an industrial scale is not feasible.
The microwave irradiation effect on copper leaching from sulfide/oxide ores
Published in Materials and Manufacturing Processes, 2018
Zohre Moravvej, Ali Mohebbi, Shahram Daneshpajouh
Two series of conventional (as controlling test) and microwave-assisted leaching experiments were carried out in a shaking incubator controlled on different temperatures (Innova 4200 model, New Brunswick scientific company, USA). The effect of the microwave was studied in two different experimental conditions; microwave irradiation of the samples in the slurry and dry states. A household microwave oven at 2.45 GHz was used for the irradiation purposes. For microwave-leaching, about 5.26 g of sulfide ore and around 5.26 g of oxide ore powder were added into 100 ml of the leach solutions in the flasks. Individually and laboratory flask containing slurry density of 5% (5 g ore in 100 cc of leaching lixiviant) was irradiated under air atmosphere for several determined times. Then the slurry temperature was recorded by means of a thermometer. Next, to conduct the leaching operations, the as-prepared slurries were placed in a shaking incubator. In the dry state, after irradiating the dry sample, a slurry was made with the irradiated sample. Then, the slurry was placed in a shaking incubator for leaching operations.
Experimental investigation on the viscosity and specific volume of gasoline fuel under the magnetisation process
Published in International Journal of Ambient Energy, 2022
Rakesh Kumar Sidheshware, S. Ganesan, Virendra Bhojwani
A measuring flask is a piece of laboratory glassware, a type of laboratory flask, calibrated to contain a precise volume at a room temperature. The flask is made of a glass with the flat bottom with measuring units. The measuring capacity of flask is 100ml.