Henna plant leaves (Lawsonia inermis) contains dye along with other ingredients. The dye component was extracted and applied on silk fibre in order to investigate the dyeing characteristics, e.g. dyeability, fastness etc. It is found that the dye up take by silk fibre was decreased with the increase of dye concentration. Similarly the absorption of dye was increased with the decrease of dye concentration. The maximum dye absorption has been observed at 0.9 % dye with 10 % alum for the period of 65 minutes at temperature 80°C and pH 4. At this optimum condition the dye absorption was 93 %. The effects of sunlight in air on silk fibre have been studied to investigate the colourfastness. The colourfastness of dyed silk fibre of water and soap solution at different treatment temperature was satisfactory. Considering dyeability and colourfastness, dye from henna matured leaves was highly applicable on dyeing of silk fibre as well as other protein fibre. Bangladesh J. Sci. Ind. Res. 42(2), 217-222, 2007

The present study focused on the influence of different extraction conditions of pectin isolated from ripe mango peel of four Bangladeshi mango varieties (Amrapali, Fazlee, Langra & Kharsapat). The correlation between biochemical properties and protein content were also observed. Five different extraction conditions were applied where the optimum conditions for highest yield and purity were ‘H2SO4-(NH4)2SO4 buffer /pH 1.5 /80 °C /1h /Amrapali’ and ‘Tem. 99.8 °C/ HCl-NaOH buffer/ pH1.5/ 1h/ Amrapali’ respectively. The best source among four varieties was Langra as it contained highest purity (AUA, 72.27±0.03%) under a specific condition.  The best extractant was HCl-NaOH buffer as the pectin extracting with it contained minimum impurity (3.10±0.06). This study also showed that pectin from Amrapali contained both Low and High Methoxyl pectin with the same extraction condition other than extractant. The proximate, elementary, microbiological, spectroscopical and structural investigations were also conducted in this study.Bangladesh J. Sci. Ind. Res. 52(3), 229-238, 2017

During selection of Gracilaria tenuistipitata var. liui (red seaweed) growing naturally at Nuniachara sand-flat south-east of Moheshkhali channel, Cox’s Bazar local fishermen informed that Rakhaine and Chakma tribes of Cox’s Bazar and Bandarbon consume the seaweed. To ascertain the quality of the organism as “Seafood” analysis of its nutritional status was carried out using three replicates in many cases. Percentage composition of total crude protein, crude fiber, crude lipid, carbohydrates, ash and moisture were 25.55 ± 0.18, 5.65 ± 0.13, 0.16 ± 0.03, 45.93 ± 1.53, 10.61 ± 0.69 and 12.10 ± 0.25%, respectively. Mineral contents such as phosphorus, calcium, magnesium, iron and copper were 596.90 ± 10.4, 132.75 ± 3.4, 3.90 ± 1.2, 80.13 ± 2.45 and3.99 ± 1.2mg/100gdry wt., respectively. Heavy metals such as Pb, As, Cr and Cd were 0.031, 0.01, 0.06 and 0.02 mg/kg dry wt. respectively, which are below tolerance level. The seaweed contained 9.03% nine essential amino acids and 7.52% five non-essential amino acids. The quantity of total energy, β-carotene and vitamin C were 294.56 Kcal/100g, 11.54 ± 1.20 and 2.5 mg/100g, respectively. Presence of high crude protein, amino acid profiles, β-carotene, phosphorus and low crude lipid and heavy metals made Gracilaria tenuistipitata var. liui to be considered as a good human food supplement. Bangladesh J. Sci. Ind. Res.56(1), 39-46, 2021

Sizing of the cotton yarn is essential to reduce breakage of the yarn due to abrasion during weaving process. The sizing agent on the woven fabric after weaving needs to remove completely before the next textile production process of dyeing and finishing. So, water soluble sizing agent is easy to handle and easy to desizing for pre-treatment of woven fabric. In this work, different types of water soluble tamarind seed kernel based sizing formulations (assigned by A, B and C) were made and applied on cotton yarn to investigate the effect on the tensile properties of sized and unsized cotton yarns. Cotton yarn treated with size B formulation shows the better tensile properties than the application of size A and size C formulation. The effect of lubricant has also been investigated and shows that the addition of lubricant decreases the tensile properties of the cotton yarn.