scholarly journals Wood variation in chemical properties of Artocarpus heterophyllus Lam. grown in Thrissur district, Kerala

2020 ◽  
Vol 8 (3) ◽  
pp. 2216-2220
Author(s):  
Pavin Praize Sunny ◽  
Anoop EV ◽  
K Vidyasagaran
Keyword(s):  
Chemical Properties ◽  
Artocarpus Heterophyllus ◽  
Wood Variation

scholarly journals Influence of Variety and Sulfite on Controlling Browning Within Four Months of Storage of Dehydrated Jackfruit (Artocarpus heterophyllus Lam.) Pulp

2013 ◽  
pp. 40-59
Author(s):  
Lorina Galvez ◽  
Remberto Patindol ◽  
Linda Mabesa
Keyword(s):  
Correlation Analysis ◽  
Enzymatic Reaction ◽  
Chemical Properties ◽  
Packaging Material ◽  
State University ◽  
Weak Correlation ◽  
Artocarpus Heterophyllus ◽  
Physico Chemical ◽  
Functional Components

The main problem of the dehydrated jackfruit developed by the Visayas State University (VSU) is that it develops browning after one to two month seven if the product is packed in a good packaging material. This study was conducted to determine the effects of variety and sulfite in controlling browning within 4 months of storage of dehydrated jackfruit pulp. Two recommended jackfruit varieties (AES Jak 1 and AES Jak 2) and two levels of sulfite (0.1 and 0.2% w/w) were used in the study. Treatments were laid out in CRD with three replications. Data were analyzed using SPSS version 16 and HSD was used to test the significance between treatments. Different parameters on physico-chemical properties and functional components of the product were investigated at 0, 2 and 4 months of storage. Results revealed that utilization of AES Jak 1 variety and either 0.1 or 0.2% w/w sulfite can be used in dehydrated jackfruit processing with least browning during storage. Correlation analysis showed that as pH and TTA increase, DB decreases which indicates that pH and TTA can be used as control in minimizing browning. The weak correlation of TP and TC on DB implies that browning of stored dehydrated jackfruit is caused by non-enzymatic reaction.

scholarly journals Physico-chemical Characteristics of Selected Jackfruit (Artocarpus Heterophyllus Lam) Varieties

2019 ◽  
Vol 8 (4) ◽  
pp. 11 ◽  
Author(s):  
J. Balamaze ◽  
J. H. Muyonga ◽  
Y. B. Byaruhanga
Keyword(s):  
Chemical Properties ◽  
Soluble Solids ◽  
Average Weight ◽  
Chemical Characteristics ◽  
Maturation Period ◽  
Artocarpus Heterophyllus ◽  
Orange Yellow ◽  
Physico Chemical ◽  
Acid Ratio ◽  
The Mean

This study was aimed at establishing the variation in physico-chemical properties between and within different jackfruit varieties. Mature jackfruits from trees known to produce orange, yellow and white flakes were harvested and ripened at 28oC and 90% relative humidity. The weight, length and circumference of ripe fruits were measured. The fruits were cut into three equal sections: top, middle and bottom. Each section was separated into flakes, rind, abortive perigones, consolidated perigones, seeds and core. The percent weight of different fruit parts, and flake physico-chemical characteristics were determined. The average weight, length, circumference and maturation period for jackfruit varieties studied were 12 kg, 47 cm, 76 cm and 104 days, respectively. The mean proportions of flakes, rind, abortive perigones, consolidated perigones, seeds and core were 24.7, 20.0, 14.5 14.3, 13.1 and 11.3%, respectively. Ascorbic acid (AA), carotenoids, total soluble solids (TSS), TSS: acid ratio, color and texture varied significantly among jackfruit sections. Color did not vary among sections of yellow and white flaked varieties. Flake texture (hardness) was 12.1, 10.5 and 6.6 N/mm for the white, yellow and orange flaked varieties, respectively. Flake textural resilience was in the order: white > yellow > orange flakes. Principle component analysis showed white flakes correlated positively with flake resilience, hardness and color lightness. Orange flakes were associated with high carotenoids and TSS content. Yellow flakes exhibited intermediate properties between those of white and orange flakes. Jackfruit flake color and section can be used as flake quality predictor.

scholarly journals Preservation of Jackfruit (Artocarpus heterophyllus) by Osmotic Dehydration

2012 ◽  
Vol 37 (1) ◽  
pp. 67-75 ◽  
Author(s):  
Md Mizanur Rahman ◽  
Md Miaruddin ◽  
MG Ferdous Chowdhury ◽  
Md Hafizul Haque Khan ◽  
Md Muzahid-E- Rahman
Keyword(s):  
Osmotic Dehydration ◽  
Chemical Properties ◽  
Storage Period ◽  
Microbial Count ◽  
Sugar Solution ◽  
Total Acid ◽  
Organoleptic Evaluation ◽  
Artocarpus Heterophyllus ◽  
Physico Chemical ◽  
Polyethylene Bags

Preservation of jackfruit (Artocarpus heterophyllus) by osmotic dehydration    method has been standardized. Four treatments of sugar concentration viz. 35°:, 40°:, 45°:, and 50°: Brix were used for osmotic dehydration. After osmosis of the jackfruit slices in the sugar solutions these were laid on the cabinet drier for dehydration. After osmotic dehydration, the products were packed in high density polyethylene bags and stored in ambient temperature for a period of 8 months. The physico-chemical properties and the microbiological changes of the products were evaluated and a taste panel evaluated the organoleptic quality of  the products during the storage period. Minimum microbial count was recorded for osmosis in 50°: Brix sugar solution followed by 45°: Brix sugar solution. The retention of vitamin A (ß- carotene), vitamin C, total acid and total sugar was also better for osmosis in 45°: Brix sugar solution followed by 50°: Brix sugar solution. The product of 45°: Brix solution when stored 8 months at room temperature secured highest score in organoleptic evaluation and was ranked "like moderately" followed by the product of 50°: Brix solution. Considering the overall acceptance of sensory evaluations, retention of nutritional quality and quantity of sugar needed, the osmotic dehydrated jackfruit prepared by 45°: Brix sugar solution could be selected for commercial processing.DOI: http://dx.doi.org/10.3329/bjar.v37i1.11178Bangladesh J. Agril. Res. 37(1): 67-75, March 2012 

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

Biophysical Measurement of Molecular Weight of Foot-and-Mouth Disease RNA Fragments

1974 ◽  
Vol 32 ◽  
pp. 262-263
Author(s):  
Sydney S. Breese ◽  
Howard L. Bachrach
Keyword(s):  
Chemical Properties ◽  
Foot And Mouth Disease ◽  
Mouth Disease ◽  
Distilled Water ◽  
Bovine Plasma ◽  
Mouth Disease Virus ◽  
Foot And Mouth ◽  
Carbon Coated ◽  
Rna Fragments ◽  
Physical And Chemical

Continuing studies on the physical and chemical properties of foot-and-mouth disease virus (FMDV) have included electron microscopy of RNA strands released when highly purified virus (1) was dialyzed against demlneralized distilled water. The RNA strands were dried on formvar-carbon coated electron microscope screens pretreated with 0.1% bovine plasma albumin in distilled water. At this low salt concentration the RNA strands were extended and were stained with 1% phosphotungstic acid. Random dispersions of strands were recorded on electron micrographs, enlarged to 30,000 or 40,000 X and the lengths measured with a map-measuring wheel. Figure 1 is a typical micrograph and Fig. 2 shows the distributions of strand lengths for the three major types of FMDV (A119 of 6/9/72; C3-Rezende of 1/5/73; and O1-Brugge of 8/24/73.

Decoration of specific sites on freeze-fractured membranes

1978 ◽  
Vol 36 (2) ◽  
pp. 140-141
Author(s):  
H. Gross ◽  
H. Moor
Keyword(s):  
Pure Water ◽  
Freeze Fracture ◽  
Chemical Properties ◽  
Surface Forces ◽  
Sulfate Pentahydrate ◽  
Copper Sulfate Pentahydrate ◽  
Physico Chemical ◽  
Water Of Hydration ◽  
Small Container ◽  
Binding Forces

Fracturing under ultrahigh vacuum (UHV, p ≤ 10-9 Torr) produces membrane fracture faces devoid of contamination. Such clean surfaces are a prerequisite foe studies of interactions between condensing molecules is possible and surface forces are unequally distributed, the condensate will accumulate at places with high binding forces; crystallites will arise which may be useful a probes for surface sites with specific physico-chemical properties. Specific “decoration” with crystallites can be achieved nby exposing membrane fracture faces to water vopour. A device was developed which enables the production of pure water vapour and the controlled variation of its partial pressure in an UHV freeze-fracture apparatus (Fig.1a). Under vaccum (≤ 10-3 Torr), small container filled with copper-sulfate-pentahydrate is heated with a heating coil, with the temperature controlled by means of a thermocouple. The water of hydration thereby released enters a storage vessel.

Cathodoluminescence of Catalyst Crystallites

1982 ◽  
Vol 40 ◽  
pp. 664-665
Author(s):  
E.D. Boyes ◽  
P.L. Gai ◽  
D.B. Darby ◽  
C. Warwick
Keyword(s):  
Defect Density ◽  
Chemical Properties ◽  
Operating Conditions ◽  
Semiconductor Materials ◽  
Environmental Cell ◽  
High Resolution Structure ◽  
Commercially Important ◽  
Crystallographic Defects ◽  
Resolution Structure

The extended crystallographic defects introduced into some oxide catalysts under operating conditions may be a consequence and accommodation of the changes produced by the catalytic activity, rather than always being the origin of the reactivity. Operation without such defects has been established for the commercially important tellurium molybdate system. in addition it is clear that the point defect density and the electronic structure can both have a significant influence on the chemical properties and hence on the effectiveness (activity and selectivity) of the material as a catalyst. SEM/probe techniques more commonly applied to semiconductor materials, have been investigated to supplement the information obtained from in-situ environmental cell HVEM, ultra-high resolution structure imaging and more conventional AEM and EPMA chemical microanalysis.

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