Bangladesh Journal of Scientific and Industrial Research

Effectiveness of trancutaneous electrical nerve stimulationon improving hyposalivation in xerostomia patients with diabetes mellitus

V Rajalaxmi, G M Harshini, C V Senthil Nathan, G Sridevi, G Mohan Kumar — Sun, 31 Mar 2024 00:00:00 +0000

The aim of the study is to analyse the effectiveness of TENS [transcutaneous electrical nerve stimulation] on improving hyposalivation in Xerostomia patients with diabetes mellitus. This was an experimental study with pre and post-test type. Sixty (60) Diabetes mellitus patients with hyposalivation condition were treated with TENS on their external surface of salivary glands and other corresponding buccal nerves. The duration of the treatment is for 15-20 minutes 1 session per day four sessions a week for 4 weeks. A simplified questionnaire is used as a screening tool and Sialometry method is used to analyze the saliva secretion. Saliva samples were collected from the subjects prior to TENS stimulation. The present study states that, the salivary secretion was increased after TENS application in continuous mode (p<0.001) and burst mode (p<0.001). It was illustrated when compared to saliva taken before therapy, particularly in xerostomic diabetes mellitus patients.

Bangladesh J. Sci. Ind. Res. 59(1), 01-06, 2024

Impact of polyvinyl alcohol for bio-adhesives preparation from tannery solid waste and its application in leather products industry

N Akter, S Chakma, K Fatama, M N Alam, M A K Azad — Sun, 31 Mar 2024 00:00:00 +0000

In this study an attempt has been undertaken to utilize the solid wastes generated by the leather industry, particularly raw trimmings, for making bio-adhesive in a cost effective and sustainable way. To enhance the adhesion properties of prepared bio-adhesive, polyvinyl alcohol (PVA) with different ratios were incorporated. Here raw trimmings was hydrolyzed using calcium oxide (CaO) and yielded maximum gelatin of 38.67% at 75°C and 4.5 hrs. The properties of the prepared adhesives were assessed through the various parameters such as viscosity, ash content, pH, density, moisture content, shear strength and peel strength. Considering shear and peel strength test, bio-adhesive containing Gelatin-PVA ratio of 1:4 have shown characteristics features that can be used as temporary adhesive in different stages of leather products preparations. This ratio almost fulfill the standard requirement.

Bangladesh J. Sci. Ind. Res. 59(1), 07-16, 2024

Extrinsic properties of unsaturated polyester resin-based hybrid composite reinforced with waste-fibers versus waste-fibers and talc: A comparative study

Sun, 31 Mar 2024 00:00:00 +0000

This study demonstrates a comparative study on the mechanical, thermal, and morphological properties between waste-fibers/unsaturated polyester (WF/PE) and talc/waste-fibers/unsaturated polyester (T/WF/PE) hybrid composite. Here, reinforcing materials came from discarded coir doormats and jute sacks. The waste fibre was treated with NaOH and then embedded into the polyester matrix using a cold compression moulding technique. On the other hand, talc filler and waste-fibres reinforced polyester resin hybrid composite was developed using the same technique, and a comparative study was performed. WF/PE hybrid composite showed tensile and flexural strength of 36.67 MPa and 38.76 MPa respectively. Talc filler-filled T/WF/PE hybrid composite reported 23.95 MPa of tensile strength and 65.2 MPa of flexural strength. Average Leeb’s robust hardness (LRH) was found 495.667 and 524.75 for WF/PE and T/WF/PE respectively. T/WF/PE hybrid composite presented low-temperature thermal degradation compared to WNF/PE hybrid composite. Surface morphology studies showed that coagulation of fibres, voids, and fibre pullout at the inner interface of the composite was a common phenomenon for both composites. WF/PE composite showed higher electrical resistivity to applied voltage compared to T/WF/PE. Water absorption studies showed that talc filler boosted the water adsorption of the T/WF/PE hybrid composite.

Bangladesh J. Sci. Ind. Res. 59(1), 17-26, 2024

Cowpea seed nutrients: Impacts on nutritional quality and acceptability of bread

T E Aruna, I F Bolarinwa, B O Olaleye, O V Adepoju — Sun, 31 Mar 2024 00:00:00 +0000

White bread is a fermented, energy-dense food with minimal protein and certain macro and micronutrients required for important living functions. In this study, bread was fortified with roasted cowpea flour (RCF) in varied amounts (0-20%). The chemical compositions and sensory properties of RCF-supplemented bread samples were evaluated using conventional procedures. Proximate analysis results demonstrated that RCF addition greatly raised the crude fiber (1.78-2.32%), ash (3.08-3.46%), fat (4.58-5.35%), and crude protein (13.81-16.82%) of the bread samples, while carbohydrate content (71.3-66.84%) reduced significantly. Supplementing bread with RCF increased the mineral content (calcium, iron, phosphorus, and magnesium) of the final bread samples. The sensory assessment score demonstrated differences in general acceptability between sample B (5% RCF with 95% wheat flour) and the other bread samples. Thus, supplementing white bread with RCF resulted in bread with improved nutritional content, particularly protein, magnesium, and phosphorous, which are required for good health.

Bangladesh J. Sci. Ind. Res. 59(1), 27-34, 2024

Case study of agriculture and development projects on Sri lanka army’s contribution to achieve food security

A Wijekoon, F Marikar — Sun, 31 Mar 2024 00:00:00 +0000

This research explores the role of the Sri Lanka Army’s in enhancing food security within the country. Food security is a critical concern in Sri Lanka, influenced by factors such as climate change, agricultural practices, and societal dynamics. Leveraging their capabilities and resources, the Sri Lanka Army can significantly contribute to addressing these challenges. This study examines the potential contributions of the army in terms of food production, infrastructure development, technology adoption, and capacity building and development. Research design is a mixed-methods approach were used by a structured questionnaire targeting various stakeholders, including pertinent Sri Lanka Army personnel and conducted in-depth interviews with key stakeholders. The analysis underscores the importance of collaboration, knowledge transfer, and sustainable practices in achieving lasting food security. Through a comprehensive approach and collaborative efforts involving various stakeholders, including government bodies, local communities, and agricultural organizations, a more resilient and secure food system can be envisioned for Sri Lanka.

Bangladesh J. Sci. Ind. Res. 59(1), 35-46, 2024

Brick sand particles as an adsorbent in column chromatography to remove heavy metals from solution

Sun, 31 Mar 2024 00:00:00 +0000

The column chromatography method was used with brick sand particles as an adsorbent for the removal of heavy metals (Cr, Fe, and Pb) from the aqueous solution. These metals can pollute water, and soil and also come in contact with the food chain, causing life-threatening health issues in the human body. The pore volume and the specific surface area of the brick sand particles were determined using the standard method which was 44.41% and 29.4 m2/g respectively. The different concentrations of toxic metals in the water solution were considered to determine the adsorption capacity of the adsorbent. The adsorption methods were able to remove about 94% of Cr, 24% Pb, and 69% Fe from the aqueous solution. From the investigation results, we may conclude that raw brick sand particles can play a vital role as an adsorbent in the treatment of heavy metal-contaminated wastewater. Moreover, the saturated adsorbent can be used as an element of construction materials to prevent further pollution.

Bangladesh J. Sci. Ind. Res. 59(1), 47-54, 2024