Control of Clinical Pathogens by the Haemolymph of Paratelphusa hydrodromous, a Freshwater Crab

In the present study, effort has been made to find the antimicrobial activity of haemolymph collected from freshwater crab, Paratelphusa hydrodromous. The haemolymph collected was tested for antimicrobial assay by disc diffusion method against clinical pathogens. Five bacterial species, namely, Escherichia coli, Klebsiella pneumonia, Proteus mirabilis, Pseudomonas aeruginosa, Staphylococcus aureus, and five fungal strains, namely and Aspergillus flavus, Aspergillus fumigatus, Aspergillus niger, Rhizopus sp., and Mucor sp., were selected for the study. The result shows a strong response of haemolymph against the clinical pathogens which confirms the immune mechanism of the freshwater crab

Study on HR policies and practices with reference to Excel Engineering and Equipments, Coimbatore

Human resource policies are continuing guidelines on the approach the organization intends to adopt in managing its people. It represents specific guidelines to HR managers various matters concerning employments. It states that intend of the organization about different aspects of Human Resource management such as recruitment, promotion, compensation, training, selections etc. They define the conception and value of the organization on how people and things should be treated. Therefore, it serves as a reference point when human resources management practices are being developed or when decisions are being made about people. A good HR policy could provide generalized guidance on the approach adopted by the organization, and therefore its employees, concerning various aspects of employments. A procedure spells out precisely what action should be taken in line with the policy. The main objective of the study is to understand the problem and to analyze the perception of employees on HR practices implemented. For this purpose a sample of 124 was collected from respondents were percentage analysis, descriptive statistics and Kruskall Wallis test and one-way ANOVA were used as tools to analyze the data and the conclusion is that Evaluation and periodic assessment are important for improvement and effectiveness

A novel porous media-based approach to outflow boundary resistances of 1D arterial blood flow models

In this paper we introduce a novel method for prescribing terminal boundary conditions in one-dimensional arterial flow networks. This is carried out by coupling the terminal arterial vessel with a poro-elastic tube, representing the flow resistance offered by microcirculation. The performance of the proposed porous media-based model has been investigated through several different numerical examples. First, we investigate model parameters that have a profound influence on the flow and pressure distributions of the system. The simulation results have been compared against the waveforms generated by three elements (RCR) Windkessel model. The proposed model is also integrated into a realistic arterial tree, and the results obtained have been compared against experimental data at different locations of the network. The accuracy and simplicity of the proposed model demonstrates that it can be an excellent alternative for the existing models

Mechanical and morphological characterization of basalt/<i>Cissus quadrangularis</i> hybrid fiber reinforced polylactic acid composites

In today's scenario, most of the research works are carried out on the replacement of synthetic fibers using eco-friendly materials called natural fibers. Although there are many research findings in connection with natural fibers, in this work, a new combination of natural fiber having high biomedical potential is reinforced in the polymer composite. Three different weight fractions of polylactic acid, basalt, and Cissus quadrangularis fibers were melt mixed using twin-screw extruder named as PBCQ 1, PBCQ 2, and PBCQ 3. The mechanical, physical, and thermomechanical properties were studied by testing tensile, flexural, impact, hardness, water absorption, Fourier-transform infrared spectroscopy, and dynamic mechanical analysis of the injection-molded biomedical composite specimens prepared as per ASTM standards. It was noticed that the PBCQ 2 composite has the maximum elongation strength, bending strength, shear strength, and shore D hardness compared to other composites taken in this study. Water absorption of PBCQ 1 and PBCQ 2 composites are relatively less than PBCQ 3. The scanning electron microscopy micrograph of PBCQ composites shows tight bonding between the matrix and fibers. The adhesion of matrix and fibers was confirmed by Fourier-transform infrared spectroscopy graph, which indicates the stretching of molecular structure for the occurrence of O–H, C=O, and C–H links. The dynamic mechanical analysis curve of the PBCQ 2 composite indicates high storage modulus and less loss modulus compared to PBCQ 1 and PBCQ 3 due to the low weight percentage of basalt fiber in these composites. </jats:p

ADSORPTION OF LEAD FROM CONTAMINATED WATER USING BIOSORBENT

For the past few years, environmental degradation caused by the discharge of heavy metals and organic contaminants has been a major source of worry. Using a natural adsorbent to tackle wastewater problems has recently been viewed as an environmentally friendly move that promotes sustainable development. Heavy metals have indeed been reduced in aqueous solutions using a variety of methods, include adsorption to the surfaces of agricultural residues. Lead is among the most toxic and common heavy metals found in industrial wastewater. In this research, adsorbents selected are moringa leaves, rice husk and coconut fibers, which are very low-cost materials, employed for the lead exclusion from industrial wastes. Thus, our study aims to investigate the ability of natural bio-sorbents to remove very toxic Pb2+ ions from aqueous solutions. Contact time, concentration, adsorbent-based dosage and pH were all evaluated as important factors in the adsorption mechanism. The adsorption efficiency was discovered to be pH dependent, rising as the solution pH was increased in the ranges of 2.5 to 6.5. After 120 min, the equilibrium state was reached, and the optimum removal rate was obtained with a 1.5 g adsorbent loaded weight. The adsorption equilibrium capability of the lead-adsorbing materials was evaluated and estimated utilizing linear Freundlich and Langmuir isotherms, with the experimental results fitting the Freundlich isotherm models.</jats:p

A Novel Green Approach for Lead Adsorption and Isotherm Evaluation

Environmental damage due to the discharge of organic pollutants and heavy metal toxins has become a major topic of concern for the past couple of years. Using just a natural adsorbent to solve wastewater concerns has lately gained popularity as an ecologically acceptable solution that encourages long-term growth. A range of approaches, including adsorption to the surface of agricultural leftovers, have been used to minimize heavy metals in an aqueous medium. Lead is amongst the most hazardous and widely discovered toxic substances in industrial waste. Citrus limetta peel powder, Banana peel powder, and Betel leaf powder were chosen as adsorbents in this study to absorb synthetic lead from an aqueous solution since they are low-cost materials. Our research aims to find natural bio-sorbents that can remove highly hazardous Pb2+ ions from aqueous solutions. The importance of contact time, concentrations, adsorbent-based dose, and pH in the adsorption process is investigated. The adsorption rate for betel leaves, Citrus limetta peel, and banana peel was 5, 10, 15, 20, and 25 g.L-1. Citrus limetta peel (10 g.L-1), banana peel (5 g.L-1), and betel leaf (5 g.L-1) provide the highest lead adsorption. Material characterization is used to determine the lead nitrate process in lead adsorption. The capacity of the lead-adsorbing substances to achieve adsorption equilibrium was assessed and estimated using linear Freundlich and Langmuir isotherms, with the experimental data fitting the Freundlich isotherm models.</jats:p