No abstract

In this work, the removal of Basic Red 5 (BR5) by using cellulose modified surface with allylthiourea as functional sites (CMS) is studied. CMS is prepared by acidification and then, the activated cellulose is mixed with allylthiourea (AT) in acetonitrile to attach AT onto activated cellulose. There are five parameters that are studied including kinetic study, pH effect, saturation study, FTIR analysis, and elemental analysis. As a result, the higher the concentration of the BR5 in the solution, the higher the percentage of removal. The most efficient pH to remove the BR5 by the CMS is at pH 7 with 80% of removal. pH effect gives significant impact in this work. Carbon, hydrogen, and nitrogen content are found to be slightly increased after adsorption of BR5 as it is loaded with some additional elements such as carbon, hydrogen and nitrogen. However, the sulfur content shows slight decrease after adsorption of the BR5 due to the contribution of active functional sites of CMS that depends on the thiol functional groups which are bonded chemically with the BR5 during separation process in batch mode.

This study was conducted to investigate proximate content of horseshoe crab (Tachypleusgigas) in Malaysia. To date, there has been little agreement on what the nutrition value of horseshoe crab is and how it will benefit the consumers. The samples were divided by two parts, which are roe and muscle. The Tachypleusgigas was cleaned of foreign materials and impurities manually by human hand. The samples were ground into flour and sieved through 50 μm sieve and were packaged in airtight plastic bags prior to analyses. The horseshoe crab was analyzed for its proximate composition of different body parts. The results showed that the roe and muscle of Tachypleusgigas contained moisture (50.45 % and 73.67 %), ash (0.41 % and 2.72 %), crude proteins (38.24 % and 14.62 %), crude fats (9.30 % and 8.09 %), carbohydrates (1.67 % and 0.91 %) and energy (241.42 Kcal/100 g and 134.43 Kcal/100 g), respectively. This shows that roe has better nutrition content since it has higher protein, fat and carbohydrate content, which are the main energy-providing nutrient. Overall, the proximate content of Tachypleusgigas was nearer to the shellfish rather than the finfish and can be considered as a good nutrition source.

No abstract