Development of chitosan-based adsorbents for removal of reactive Azo Dyes from Aqueous solution.

The adsorption of reactive blue 19 (RB19), reactive orange 16 (R016) and reactive black 5 (RB5) on cross-linked chitosan/oil palm ash composite beads was studied in batch and column modes of operation. Penjerapan pencelup reaktif biru 19 (RB19), reaktif oren 16 (R016) dan reaktif hitam (RB5) menggunakan manik-manik komposit chitosan/abu kelapa sawit terpaut silangan dikaji pada kedua-dua keadaan operasi iaitu kelompok dan turus

Adsorption Equlibrium Of Phenols From Aqueous Solution Using Modified Clay.

The adsorption equilibrium study of phenol, 3-chlorophenol and o-cresol from liquid-phase system was carried out at temperature of 30°C using modified montmorillonite

Adsorption Kinetics Of Phenolic Compunds Onto Activated Carbon.

Aqueous-phase adsorption equilibrium and kinetic mechanism of phenol, 3-chlorophenol and o-cresol onto Norit Granular Activaied Carbon (NAC 1240) were studied in a batch system at temperature of 30oC,agitation speed of 120 rpm, initial phenol concentrations of 25-200 mg/l

[ENV03]Equilibrium Adsorption Study Of 3-Chlorophenol And O-cresol On Modified Mantmorillonite.

Phenolic compounds are commonly produced in wastewater streams generated by petrochemical, oil refineries, coal conversion,steel plant, paint and phenol-producing industries (Gallego et al., 2003; Aygunn et al.,2003)

Single And Binary Adsorption Of Phenol And 3-Chlorophenol Onto Granular Activated Carbon.

Removal of phenol and 3-chlorophenol from single and bisolute diluted aqueous solution through adsorption on commercial granular activated carbon were experimentally investigated

Adsorption Isotherms For Phenol Onto Activated Carbon.

This laboratory study investigated the effectiveness of two types of activated carbons (ACs), NORIT Granular Activated Carbon (NAC 1240) and NORIT Granular Activated Carbon D10 (NAC D10),for the removal of phenol from aqueous solutions. The study was carried out under batch mode at different initial concentrations (10-60mg/I) and at temperature of 30°C. The adsorption isotherm parameters for the Langmuir and Freundlich models were determined using the adsorption data. It was found that both the Langmuir and the Freundlich isotherms described well the adsorption behavior of phenol on NAC D10, while the Freundlich isotherm described very well the adsorption of phenol on NAC 1240

Adsorption Isotherm Of O-cresol From Aqueous Solution By Granular Activated Carbon.

Equilibrium adsorption isotherms of o-cresol from aqueous solution were investigated by a series of laboratory batch studies

Aqueous-Phase Adsorption Of Phenolic Compounds On Activated Carbon.

Laboratory batch studies were conducted on adsorption of phenol, 3-chlorophenol and o-cresol from aqueous solution by Norit Granular Activated Carbon (NAC 1240)

A novel convolutional feature-based method for predicting limited mobility eye gaze direction

Eye gaze direction is a critical issue since several applications in computer vision technology rely on determining gaze direction, where individuals move their eyes to limited mobility locations for sensory information. Deep neural networks are considered one of the most essential and accurate image classification methods. Several methods of classification to determine the direction of the gaze employ convolutional neural network models, which are VGG, ResNet, Alex Net, etc. This research presents a new method of identifying human eye images and classifying eye gaze directions (left, right, up, down, straight) in addition to eye-closing discrimination. The proposed method (Di-eyeNET) stands out from the developed method (Split-HSV) for enhancing image lighting. It also reduces implementation time by utilizing only two blocks and employing dropout layers after each block to achieve fast response times and high accuracy. It focused on the characteristics of the human eye images, as it is small, so it cannot be greatly enlarged, and the eye's iris is in the middle of the image, so the edges are not important. The proposed method achieves excellent results compared to previous methods, classifying the five directions of eye gaze instead of the four directions. Both the global dataset and the built local dataset were utilized. Compared to previous methods, the suggested method's results demonstrate high accuracy (99%), minimal loss, and the lowest training time. The research benefits include an efficient method for classifying eye gaze directions, with faster implementation and improved image lighting

Psychometric analysis of the perceived stress scale among healthy university students

© 2020 Anwer et al. Background: There is a gradual increase in the prevalence of stress during professional courses. Previous studies reported a high incidence of stress among university students. The psychometric properties of the perceived stress scale-10 (PSS-10) have been established in different populations. The current study aimed to assess psychometric properties of the PSS10 in Saudi university students. Methods: Healthy university students (n= 192) participated in this cross-sectional study. All the participants were explained about the aim and procedures of the study. Participants were requested to complete the English version of the PSS, the generalized anxiety disorder-7 (GAD-7), the sleep hygiene index (SHI), and demographic details. Results: The range of the PSS-10 total score was 0–35; 1% reported minimum score of 0, but none reported maximum score of 40. Therefore, there was no issue of ceiling or floor effect in the PSS-10 total score. Positive and significant correlations of the PSS total and the PSS Factor-1 (distress perception) with the GAD-7 total score, SHI item-8 and SHI item-13 score support its convergent validity. Negative or no correlation of the PSS Factor-2 score (coping perception) with the GAD-7 total score, SHI item-8 and SHI item-13 scores demonstrate its divergent validity. The internal homogeneity test indicated moderate to strong positive correlations (r=0.60–0.82) between the PSS Factors and the items loading on them. The internal consistency test showed a good agreement for the PSS Factor-1 and the PSS Factor-2 scores (Cronbach’s alpha 0.78 and 0.71, respectively), suggesting an acceptable level of consistency. Factor analysis favored a 2-Factor model of the PSS in the Saudi students. Conclusion: The current study supported the use of the PSS-10 to assess the perceived stress among Saudi university students