SUGARS AND ACID CONTENT INFLUENCE ORGANOLEPTIC EVALUATION OF FRUITS OF SIX STRAWBERRY CULTIVARS FROM CONTROLLED CULTIVATION

Pear pulp and grapes juice were used in different ratios (100:0, 90:10, 80:20, 70:30, 60:40, 50:50) for the preparation of leather. The treatments were prepared with different concentration of pulp and constant level of sucrose and preservatives. The experiment was laid out in a complete randomized design (CRD). The effects of storage and treatments were studied for three months of storage with an interval of 15 days. Various parameters such as moisture, percent acidity, total soluble solids, water activity, ascorbic acid content, reducing sugar, non-reducing sugar and sensory attributes i.e. colour, taste, texture and overall acceptability were studied. Significant differences were observed in all the studied parameters. A decrease was recorded in moisture (16.02 to 13.76%), ascorbic acid content (13.21 to 6.64 mg/100g), non-reducing sugar (67.02 to 64.76%) and water activity (0.50 to 0.45), while an increase was recorded in titratable acidity (0.88 to 1.01%), TSS (76.68 to 79.05 °brix) and reducing sugar (11.43 to 11.85%). Base on organoleptic evaluation T3 was found most acceptable during storage. The combination of 70% pear pulp and 30% grapes juice for leather preparation proved to be the best combination in terms of extending the shelf life and improving the quality of pear and grapes blended leather during storage.

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Performance of Cassava Cultivars in an Oxisol inNorthwestern Puerto Rico

The Journal of Agriculture of the University of Puerto Rico ◽

10.46429/jaupr.v68i4.7306 ◽

1969 ◽

Vol 68 (4) ◽

pp. 375-381

Author(s):

J. Badillo-Feliciano

Keyword(s):

Puerto Rico ◽

Acid Content ◽

Manihot Esculenta ◽

Hydrocyanic Acid ◽

Manihot Esculenta Crantz ◽

Organoleptic Evaluation ◽

East Central

Fifty-five cassava cultivars (Manihot esculenta, Crantz) were evaluated for 3 consecutive years in a Coto clay (Oxisol) in northwestern Puerto Rico. The highest yielders, averaged over 3 years, were PI 12902, Jamaica 18, PI 9570 and PI 12003 with 34,345, 29,906, 26,845 and 24,684 kg/ha, respectively. The organoleptic evaluation reveals that all but PI 12903 were found to be acceptable. The hydrocyanic acid content among cultivars was below the moderately toxic levels, (50 p/m). These results are in line with previous work conducted in east central Puerto Rico.

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Effect of light intensity on the ultrastructure of the filamentous cyanobacterium, Anabaena variabilis

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100103565 ◽

1988 ◽

Vol 46 ◽

pp. 300-301

Author(s):

C. S. Bricker ◽

S. R. Barnum ◽

B. Huang ◽

J. G. Jaworskl

Keyword(s):

Fatty Acid ◽

Light Intensity ◽

Acid Content ◽

Fatty Acid Content ◽

Anabaena Variabilis ◽

Chloroplast Envelope ◽

Major Constituent ◽

Filamentous Cyanobacterium ◽

Photosynthetic Membrane ◽

Effect Of Light

Cyanobacteria are Gram negative prokaryotes that are capable of oxygenic photosynthesis. Although there are many similarities between eukaryotes and cyanobacteria in electron transfer and phosphorylation during photosynthesis, there are two features of the photosynthetic apparatus in cyanobacteria which distinguishes them from plants. Cyanobacteria contain phycobiliproteins organized in phycobilisomes on the surface of photosynthetic membrane. Another difference is in the organization of the photosynthetic membranes. Instead of stacked thylakolds within a chloroplast envelope membrane, as seen In eukaryotes, IntracytopIasmlc membranes generally are arranged in three to six concentric layers. Environmental factors such as temperature, nutrition and light fluency can significantly affect the physiology and morphology of cells. The effect of light Intensity shifts on the ultrastructure of Internal membrane in Anabaena variabilis grown under controlled environmental conditions was examined. Since a major constituent of cyanobacterial thylakolds are lipids, the fatty acid content also was measured and correlated with uItrastructural changes. The regulation of fatty acid synthesis in cyanobacteria ultimately can be studied if the fatty acid content can be manipulated.

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