NOPR Community:

Canning of Peach-halves in Fruit Juice

2014-02-11T16:53:12Z

Title: Canning of Peach-halves in Fruit Juice Authors: Sharma, K D; Kaushal, Manisha; Kaushal, BB Lal Abstract: Lye peeled peach halves of July Elberta canned in A2½ size tin cans in a covering medium of 40°B in different proportions (10-40 per cent, peach pulp and enzymatically extracted peach juice with or without ascorbic acid at 500 ppm) were evaluated for Storability, nutritional value and sensory attributes. Cut-out analysis of canned fruits after 6 mo revealed that all the treatments met FPO specifications for drained weight and showed improvement over the conventional canned peaches. As expected the vitamin C fortified treatments retained higher amounts of ascorbic acid. Addition of pulp or juice in covering media prevented the non-enzymatic browning to a greater extent. Rased on the sensory evaluation the addition of juice or pulp in covering syrup significantly improved the sugar/acid blend of the canned halves. Treatment containing 40 per cent peach pulp was rated as the best treatment followed by 30 per cent peach pulp in a covering medium of 40°B on the basis of physico-chemical, sensory and microbiological evaluation. The additional advantage of canning of fruits in natural fruit juice or pulp occurred due to the use of covering syrup in the preparation of the ready-to-serve-beverage (RTS) of 15°B prepared from the leftover covering medium containing 40 percent peach pulp and was rated best on the basis of sensory quality. Overall it can be concluded that sucrose syrup being used in canning of peach halves at present can success fully be replaced with the covering medium containing 30-40 per cent of peach pulp. Addition of pulp or juice not only improve the quality of canned product but, enhance its nutrition along with the economic utilization of the left over covering media in the form of RTS beverage. Page(s): 823-827

Extraction Equilibria of Aqueous Solution of Acetic Acid with Tri-n-octylamine

2014-02-04T16:52:13Z

Title: Extraction Equilibria of Aqueous Solution of Acetic Acid with Tri-n-octylamine Authors: Inci, Tsmail Abstract: The extraction of acetic acid from aqueous solutions by tri-n-octylamine dissolved in various diluents in wide range of amine concentration (0.23 -1.15 mol/ L) is studied. Extraction equilibria of acetic acid in the solution of tri -n-octylamine in five various solvents at 298.15 K is measured. Diluting solvents used in this study are hexane, cyclohexane, toluene, methyl isobutyl ketone (MIBK), and propanol. Using Bizek approach two acids : amine complexes. (Acid), (Amine) and (Acid) , (Amine)₂ is are assumed to exist in the organic phase in the case of proton- donating diluents, while the complexes (Acid), (Amine) and (Acid)₂, (Amine)₃ are suggested in the case of non-proton-donating diluents. As a result of batch extraction experiments, distribution coefficients (D), loading factors (Z), and overall extraction constants (K₁₁, K₁₂ , K₂₃) are calculated. Page(s): 817-822

Comparative Performance of Ion-exchanged ZSM-5 and Y -Zeolite Catalysts for Toluene Disproportionation Reaction

2014-02-04T16:53:12Z

Title: Comparative Performance of Ion-exchanged ZSM-5 and Y -Zeolite Catalysts for Toluene Disproportionation Reaction Authors: Chaudhari, Parmesh K; Saini, Pradeep K; Chand, Shri Abstract: The toluene disproportionation reaction was carried out using ZSM-5 as well as Y- zeolite catalysts after ion exchange with active metals Ni, Pb,and Cr. The reaction was carried out under atmospheric pressure. The effect of type of cation used for ion exchange, silica- alumina ratio, type of zeolite, and particle size were also studied. The percent p-xylene yield (which is the most desirable product), was found to increase after ion-exchange with active cations. A maximum p -xylene yield of 2.3 percent was obtained with Cr HZSM-5 (SAR-19) at 600C and 1 atmos pressure. Page(s): 810-816

Flame Retardant Smoke Suppressant Coatings for PVC Sheathed Electric Cables

2014-02-11T16:54:08Z

Title: Flame Retardant Smoke Suppressant Coatings for PVC Sheathed Electric Cables Authors: Saxena, N K; Sharma, Sunil K Abstract: Flame retardant smoke suppressant intumescent coatings, based on phosphates, amides, polyols, propanediono complex of molybdenum, vinyl acetate and vinyl versatate copolymer emulsion are developed for polyvinl chloride (PVC) sheathed electrical cables. National and international standard procedures are followed to evaluate the fire performance of the coatings. The coated cab les do not show any surface spread of flame on exposure and generation of smoke is found to be well within the limits, in accordance with the ASTM standards. The coatings are found quite effective in reducing the burning behaviour of power cables. Significant improvement in circuit failure time is noted in coated cable specimens. Page(s): 805-809