NOPR Collection:

Heat Radiation Law — From Newton to Stefan

Fri, 01 Nov 2002 00:00:00 GMT

Title: Heat Radiation Law — From Newton to Stefan Authors: Wisniak, Jaime Abstract: The understanding and quantification of the phenomenon of heat radiation has gone through many phases, parallel to the interpretation of the concept of heat. Page(s): 545-555

The role of AlPO₄-11 in the synthesis of bisphenol-A and cinnamic acid

Fri, 01 Nov 2002 00:00:00 GMT

Title: The role of AlPO₄-11 in the synthesis of bisphenol-A and cinnamic acid Authors: Kumar, B V Suresh; Byrappa, K; Rai, K M Lokanatha; Anand, S; Rao, R V Abstract: AlPO₄-11 was used as catalyst for the synthesis of bisphenol-A by Friedel-Crafts condensation of acetone with phenol in presence of carbon tetrachloride and synthesis of cinnamic acid by Knovenagel condensation of aromatic aldehydes with malonic acid in presence of ethyl alcohol. Page(s): 543-544

Removal of trace metals with mango seed powder

Fri, 01 Nov 2002 00:00:00 GMT

Title: Removal of trace metals with mango seed powder Authors: Parekh, Dimple C; Patel, Jignesh B; Sudhakar, Padmaja; Koshy, V J Abstract: Removal of heavy metals like Cu, Cd, Pb from aqueous solution was studied using mango seeds powder. Study was carried out in batch technique as a function of contact time, metal ion concentration and pH of the solution. The sorption process follows Freundlich sorption isotherm. Maximum sorption was observed at acidic pH itself. The method is applied to various synthetic solutions. Page(s): 540-542

Comparative study of catalytic activity of immobilized invertase in sodium alginate gel on sucrose hydrolysis

Fri, 01 Nov 2002 00:00:00 GMT

Title: Comparative study of catalytic activity of immobilized invertase in sodium alginate gel on sucrose hydrolysis Authors: Khobragade, C N; Chandel, S G Abstract: Invertase is an intracellular hydrolytic enzyme widely used in the inversion of sucrose into glucose and fructose. Both glucose and fructose are the primary compounds used as sweeteners in the food processing industries. In the present investigation invertase was immobilized in sodium alginate gel by entrapment method and the catalytic activity of immobilized enzyme was compared with the activity of native enzyme at variable pH and temperatures. Experimental findings revealed that for native enzyme optimum activity was at pH 4.2 and at temperature 30°C, while for immobilized enzyme it was observed at pH 4.8 and at temperature 50°C. Kinetic parameters K_m and V_max as well as catalytic efficiency of invertase was also determined for both the native and immobilized enzyme. Page(s): 535-539

NOPR Collection:

Heat Radiation Law — From Newton to Stefan

The role of AlPO4-11 in the synthesis of bisphenol-A and cinnamic acid

Removal of trace metals with mango seed powder

Comparative study of catalytic activity of immobilized invertase in sodium alginate gel on sucrose hydrolysis

The role of AlPO₄-11 in the synthesis of bisphenol-A and cinnamic acid