scholarly journals Effects of different fertilization practices on the glucose, fructose, sucrose, taste and texture of carrot

1989 ◽  
Vol 61 (2) ◽  
pp. 113-122
Author(s):  
Aino-Maija Evers
Keyword(s):  
High Performance ◽  
Field Experiments ◽  
Sugar Content ◽  
Weather Conditions ◽  
Total Sugar ◽  
Sucrose Content ◽  
Glucose Content ◽  
Total Sugar Content ◽  
Contrast Analysis ◽  
The Mean

The effects of different fertilization practices on the glucose, fructose, sucrose, taste and texture of carrot cv. Nantes Duke Notabene 370 Sv were studied in field experiments carried out in southern Finland in 1985 and 1986. The effects of unirrigated and irrigated placement and broadcast fertilization, NPK fertirrigations without basic fertilization, NPK fertirrigations with NPK basic fertilization, and PK placement with N fertirrigations were compared. Further, the effects of single application were compared with those of split applications. Sugar analyses were made by high performance liquid chromatography, and sensory evaluations were performed for taste and texture. The results were analysed by contrast analysis. In 1985, fertilization and fertilization practices had no effects on sugar contents. In 1986, the unfertilized treatments had a tendency to yield higher glucose and fructose, and thus also total sugar contents than did the fertilized treatments on the average. Placement fertilization had a tendency to increase the glucose content as compared to NPK fertirrigations. No significant differences or tendencies were found in sucrose content. The glucose and fructose contents were higher in 1985 than in 1986. The sucrose content was mainly opposite, being higher in 1986.Weather conditions were more favourable for photosynthesis in 1986 than in 1985. The mean total sugar content in fresh weight was 7.8 % in 1985 and 6.7 % in 1986. Indicative results of taste and texture are presented. The sugar content in organically cultivated carrots did not differ from that of conventionally grown carrots, but the taste was worse.

scholarly journals Heavy Metal Contents and Physical Parameters ofAegiceras corniculatum, Brassica juncea, andLitchi chinensisHoneys from Bangladesh

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Nandita Sarker ◽  
Muhammed Alamgir Zaman Chowdhury ◽  
Abu Naieum Muhammad Fakhruddin ◽  
Zeenath Fardous ◽  
Mohammed Moniruzzaman ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Brassica Juncea ◽  
Sugar Content ◽  
Physicochemical Analysis ◽  
Total Sugar ◽  
Physical Parameters ◽  
Total Sugar Content ◽  
Metal Levels ◽  
The Mean

The present study was undertaken to determine the heavy metal levels and the physicochemical parameters (pH, electrical conductivity (EC), and ash, moisture, and total sugar content) of honeys from Bangladesh. Three different floral honeys were investigated, namely, khalsi (Aegiceras corniculatum), mustard (Brassica juncea), and litchi (Litchi chinensis) honeys. The heavy metals in the honeys were determined by using a High Temperature Dry Oxidation method followed by Atomic Absorption Spectroscopy. The mean pH, EC, and ash, moisture, and total sugar contents of the investigated honeys were 3.6, 0.51 mS/cm, 0.18%, 18.83%, and 68.30%, respectively. Iron was the most abundant among all the investigated heavy metals, ranging from 13.51 to 15.44 mg/kg. The mean concentrations of Mn and Zn in the investigated honeys were 0.28 mg/kg and 2.99 mg/kg, respectively. Cd was below the detection limit, and lead was found in some honey samples, but their contents were below the recommended Maximum Acceptable Level. Cr was also found in all of the samples, but its concentration was within the limit. The physicochemical analysis of the honey samples yielded levels within the limits set by the international honey legislation, indicating that the honey samples were of good quality and had acceptable values for maturity, purity, and freshness.

scholarly journals Failure of preharvest foliage sprays with 2, 4-d and maleic hydrazide to affect the sucrose content of sugarcane

1969 ◽  
Vol 37 (1) ◽  
pp. 44-51
Author(s):  
M. A. Lugo-López ◽  
G. Samuels ◽  
R. Grant
Keyword(s):  
Puerto Rico ◽  
Seasonal Variations ◽  
Field Experiments ◽  
Maleic Hydrazide ◽  
Rio Grande ◽  
Weather Conditions ◽  
Sucrose Content ◽  
East Central ◽  
The Mean

Data are presented here on the effect of applications of 2,4-D and maleic hydrazide to sugarcane at intervals prior to harvesttime. Field experiments were conducted at Río Piedras in northern Puerto Rico and at Colonia Río Grande, between Caguas and Gurabo, in east-central Puerto Rico. Daily fluctuations in Brix, polarization, purity, and available 96° sugar percent cane were followed for 46- and 72-day periods, respectively. No significant differences were observed between the mean available 96° sugar percent cane that could be ascribed to treatments. Seasonal variations and variations attributable to weather conditions were rather important factors at both locations.

scholarly journals A Single Recessive Gene for Sucrose Accumulation in Cucumis melo Fruit

2002 ◽  
Vol 127 (6) ◽  
pp. 938-943 ◽  
Author(s):  
Yosef Burger ◽  
Uzi Saar ◽  
Nurit Katzir ◽  
Harry S. Paris ◽  
Yelena Yeselson ◽  
...  
Keyword(s):  
Cucumis Melo ◽  
Sugar Content ◽  
Recessive Gene ◽  
Total Sugar ◽  
Sucrose Accumulation ◽  
Sucrose Content ◽  
Single Recessive Gene ◽  
Total Sugar Content ◽  
Fruit Flesh ◽  
High Sucrose

Fruit sweetness is the major determinant of fruit quality in melons (Cucumis melo L.) and reflects the concentration of the three major soluble sugars, sucrose, glucose, and fructose, present in the fruit flesh. Of these three sugars, sucrose is the prime factor accounting for both the genetic and the environmental variability observed in sugar content of C. melo fruit. Faqqous (subsp. melo var. flexuosus), a cultivar having a low sucrose and total sugar content, was crossed with Noy Yizre'el (subsp. melo var. reticulatus), a cultivar having a high sucrose and total sugar content. F1 plants had a sucrose content averaging slightly higher than that of the low-sucrose parent, indicating that low sucrose content is nearly completely dominant. Segregation in the F2 and backcross progenies indicated that high sucrose accumulation in melon fruit flesh is conferred by a single recessive gene herein designated suc. When the high-sucrose parent was crossed with the moderate-sucrose landrace known as Persia 202 (subsp. melo var. reticulatus), the segregation in the filial and backcross progenies suggested that additional genetic factors affect the amount of sucrose accumulation.

Syrup from Common Date Variety (Phoenix dactylifera L.): Optimization of Sugars Extraction and their Quantification by High Performance Liquid Chromatography

2020 ◽  
Vol 16 (4) ◽  
pp. 530-542 ◽  
Author(s):  
Kahina Djaoud ◽  
Lynda Arkoub-Djermoune ◽  
Hocine Remini ◽  
Sabrina Sait ◽  
Myriam Tazarourte ◽  
...  
Keyword(s):  
High Performance ◽  
Sugar Content ◽  
Phoenix Dactylifera ◽  
Total Sugar ◽  
Ultrasound Assisted Extraction ◽  
Total Sugar Content ◽  
Date Syrup ◽  
Assisted Extraction ◽  
Phoenix Dactylifera L ◽  
Ultrasound Assisted

Background: In Algeria, important quantities of secondary date variety (Phoenix dactylifera L.) are generated in each campaign; their chemical composition is similar to that of commercial dates. The present work aims to valorize this common date variety (Degla-beida) which is often poorly exploited. Methods: In this context, we tried to prepare syrup from the secondary date variety and evaluate the effect of conventional extraction (CE) or water bath extraction (WBE) and alternative extraction (microwaves assisted extraction (MAE) and ultrasound-assisted extraction (UAE)) on its total sugar content (TSC), using response surface methodology (RSM). Then, the analysis of individual sugars was performed by high performance liquid chromatography (HPLC). Results: Maximum predicted TSC recoveries under the optimized conditions for MAE, UAE and CE were 233.248 ± 3.594 g/l, 202.889 ± 5.797 g/l and 233.535 ± 5.412 g/l, respectively, which were close to the experimental values: 233.796 ± 1.898 g/l; 202.037 ± 3.401 g/l and 234.380 ± 2.425 g/l. HPLC analysis revealed high similarity in the sugar composition of date juices obtained by MAE (60.11% sucrose, 16.64% glucose and 23.25% fructose) and CE (50.78% sucrose, 20.67% glucose and 28.55% fructose), although a large difference was detected for that obtained by UAE (0.00% sucrose, 46.94% glucose and 53.06% fructose). Conclusion: Microwave-assisted extraction was the best method for the preparation of date syrup with an optimal recovery of total sugar content. However, ultrasound-assisted extraction was the best one for the preparation of date syrup with high content of reducing sugars.

Characterization of Zygophyllum album L Monofloral Honey from El-Oued, Algeria

2019 ◽  
Vol 15 (5) ◽  
pp. 476-483 ◽  
Author(s):  
Mohammed Adel Mesbahi ◽  
Mohammed Redha Ouahrani ◽  
Abdelkrim Rebiai ◽  
Djilani Ghamem Amara ◽  
Atef Chouikh
Keyword(s):  
Electrical Conductivity ◽  
Physicochemical Parameters ◽  
High Performance ◽  
Sugar Content ◽  
Antioxidant Properties ◽  
Specific Rotation ◽  
Physicochemical Analysis ◽  
Total Sugar ◽  
Free Acidity ◽  
Total Sugar Content

Background: Honey is generally evaluated by physicochemical analysis of its constituents. The manipulation of honey and its possible adulteration is reflected in many of its physicochemical properties. Objective: In this study, samples of Zygophyllum album L honey produced in El-Oued, Algeria, were characterized based on their melissopalynology, physicochemical and antioxidant properties, also polyphenol content. Methods: The physicochemical parameters of honey, such as density, moisture content, pH, free acidity, electrical conductivity (EC), total sugar content, color intensity, water insoluble solids content, hydroxymethylfurfural (HMF), ash, specific rotation, were measured. A number of antioxidant tests were performed to determine the antioxidant properties of Zygophyllum album L honey samples. The polyphenol in the Zygophyllum album L honey was measured by spectrometric determination based on folin-ciocalteu’s method. The identification and quantification of phenolic compounds were carried out by RP-HPLC (high-performance liquid chromatography). Results: All honey samples contained monofloral (67.83-91.89%) pollen belonging to Zygophyllum album L. The results of physicochemical parameters of analyzed honeys were: pH 4.33, moisture 17.2%, free acidity 41.96 meq/kg, electrical conductivity 0.408 mS/cm, HMF 11.89 mg/kg, Ash 0.246 (%), specific rotation -8.21. The Zygophyllum album L honey was extra white amber. The total sugar content ranged from 81.5 to 83. Honey samples contain high levels of gallic acid (252.53±15.56 mg/kg honey), chlorogenic acid (124.71±10.09 mg/kg) and low amounts of total polyphenol (467.82±46,98 mg GAE/kg). Conclusion: Physicochemical parameters (total acidity, pH, moisture, dry matter, ash, and qualitative hydroxymethylfurfural) were within the approved limits established by International Honey Commission.

scholarly journals Sugar composition and in vitro glycaemic response of selected sugars, rice-based meals and traditional kuih

Food Research ◽  
2020 ◽  
Vol 4 (S1) ◽  
pp. 187-195
Author(s):  
F.N. Mohd Nawawi ◽  
I.S. AhmadFadzly ◽  
Noor Safiqah Ain Safingi N.S.A. ◽  
N. Mustafa Khalid ◽  
M.F. Md Noh ◽  
...  
Keyword(s):  
Glucose Concentration ◽  
High Performance ◽  
Sugar Content ◽  
In Vitro Digestion ◽  
Food Samples ◽  
Total Sugar ◽  
Sugar Composition ◽  
Glycaemic Response ◽  
Total Sugar Content

High glycaemic index foods were found to increase the risk of getting diabetes, obesity, cancer and cardiovascular disease. This study aimed to determine the in vitro glycaemic response and sugar composition of selected food types, which include sugars, rice-based meals and traditional cakes and desserts (kuih). The food samples were purchased prepared and analysed using High Performance Liquid Chromatography (HPLC) to determine the sugar composition. The samples were also prepared and assayed using validated in vitro digestion method to determine the estimated glycaemic response. The in vitro method used 0.25g total available carbohydrate, which was established by Clegg Anthrone method. Among the studied samples, the total sugar content was icing sugar (100%), which has the highest percentage, nasi kerabu (7.49%) and kuih lapis (42.20%) for sugars, rice-based meals and traditional kuih, respectively. Dialyzable glucose concentration for the sugar samples was highest in the sugar in sachet (3.47 mg/mL) and lowest in the sugar with stevia (0.49 mg/mL). For the different types of rice-based meals, the highest dialyzable glucose concentration was in nasi lemak (13.06 mg/mL), and the lowest was in nasi kerabu (12.33 mg/mL). While for traditional kuih, kuih lapis (10.53 mg/mL) and kuih keria (6.30 mg/mL) were highest and lowest in the dialyzable glucose concentration, respectively. Significant correlations exist between dialyzable glucose concentration (at 120 minutes) and sugar composition (p<0.05) for the rice-based samples. Among the traditional kuih samples, sucrose content and total sugar content was correlated significantly. However, no correlation exists between dialyzable glucose concentration and sugar composition for the selected sugar samples. Factors such as particle size and presence of phytochemical in sugars, available nutrients (starch, protein and fat) in kuih and cooked dishes as well as the amount of added sugar in food are vital factors that affect the in vitro glycaemic response of the studied samples.

scholarly journals Refractometer Measurements of Soluble Solid Concentration Do Not Reliably Predict Sugar Content in Sweet Corn

2005 ◽  
Vol 15 (3) ◽  
pp. 668-672 ◽  
Author(s):  
Teri A. Hale ◽  
Richard L. Hassell ◽  
Tyron Phillips
Keyword(s):  
High Performance ◽  
Sweet Corn ◽  
Sugar Content ◽  
Negative Relationship ◽  
Total Sugar ◽  
Water Soluble ◽  
Soluble Solids ◽  
Sugar Concentration ◽  
Total Sugars ◽  
Total Sugar Content

The refractometer has been proposed as a rapid, inexpensive technique for determining sugar levels in fresh sweet corn (Zea mays). High performance liquid chromatography (HPLC) analysis of sugars in three phenotypes (su, se, and sh2) of sweet corn harvested at three maturities indicated that sucrose content was highly correlated with the total sugars (R = 0.95). Sucrose and total sugar concentration were significantly different among all phenotypes. Soluble solids concentration (SSC) was high in su and se compared to the lower SSC of sh2. Early, mature, and late harvested samples differed in sucrose and total sugar content. Sugar concentration varied within phenotypes at each maturity level. Sh2 indicated no difference in sucrose and total sugars at early and mature harvests, but increased at late harvest. In contrast, sucrose and total sugar content decreased between early and mature harvests, then increased to highest levels at late harvest in se and su phenotypes. Overall, phenotype SSC increased significantly from early to late harvests, probably due to increased water-soluble polysaccharides in the su and se cultivars. Unlike other crops, a negative relationship was found in sweet corn between SSC and sucrose or total sugars, with an overall correlation of –0.51. This relationship was most affected by maturity, especially mature and late harvested sweet corn. Among phenotypes, sucrose, total sugar, and SSC were poorly correlated. Our results indicate that a refractometer should not be used to estimate total sugars or sucrose of sweet corn.

scholarly journals Use of Refractive Index to Monitor Changes in Sugar Content of Stored Sweetpotatoes

HortScience ◽  
1992 ◽  
Vol 27 (4) ◽  
pp. 333-335 ◽  
Author(s):  
William M. Walter
Keyword(s):  
Refractive Index ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Ipomoea Batatas ◽  
Sugar Content ◽  
Total Sugar ◽  
Total Sugar Content

The sugar content of five sweetpotato [Ipomoea batatas (L.) Lam.] cultivars (`Centennial', `Cordner', `Georgia Red', `Jewel', and `Sweet Red') was measured by high-performance liquid chromatography (HPLC) and compared to the sugar content of the cellular sap measured by refractive index (RI). The HPLC and RI sugar contents were measured at harvest, after curing, and during storage. Changes in the sugar content, as determined by the RI, were found to be linearly related to changes in the sugar content of cell sap and tissue, as measured by HPLC, indicating that this method can be used to monitor changes in postharvest total sugar content.

Primary metabolites in the leaves and fruits of three pear cultivars during the growing season

2007 ◽  
Vol 87 (2) ◽  
pp. 327-332 ◽  
Author(s):  
Metka Hudina ◽  
Mateja Colarič ◽  
Franci Štampar
Keyword(s):  
Organic Acids ◽  
High Performance ◽  
Sugar Content ◽  
Growing Season ◽  
Total Sugar ◽  
Primary Metabolites ◽  
Total Sugars ◽  
Total Sugar Content ◽  
Leaf Drop ◽  
Similar Dynamic

Primary metabolites (sugars and organic acids) in leaves and fruits of the pear cultivars Conference, Concorde and Williams were investigated during the growing season in Slovenia. Leaves were sampled 15 times from Apr. 25 to Oct. 22. Fruits were sampled seven times from Jun. 14 to Aug. 23. The contents of sugars (glucose, fructose, sucrose, and sorbitol) and organic acids (malic, citric, shikimic, and fumaric) in leaves and fruit were determined by high performance liquid chromatography (HPLC). Similar dynamic patterns were found in the glucose, fructose, sucrose and sorbitol in leaves and fruits of the genetically related cultivars Conference and Concorde. Leaf sugar was low at the beginning of the growing season when the leaves were not completely developed. Generally when sucrose increased in leaves it decreased in fruits. At the end of June the total sugar content in leaves reached its peak then rapidly decreased. At the same time, total sugar in fruits increased. From the beginning of August, total sugars in fruits increased regardless of the sugar content in leaves and likely due to decomposition of starch. After harvest, the contents of individual sugars (glucose, fructose, sucrose, and sorbitol) in the leaves decreased until the beginning of October when, just prior to leaf drop, they increased in all cultivars. Key words: Pyrus communis, sugars, organic acids

Mid and near Infrared Study of Carbohydrates by Canonical Correlation Analysis

1993 ◽  
Vol 1 (2) ◽  
pp. 99-108 ◽  
Author(s):  
P. Robert ◽  
M.F. Devaux ◽  
A. Qannari ◽  
M. Safar
Keyword(s):  
Correlation Analysis ◽  
Infrared Spectra ◽  
Canonical Correlation ◽  
Near Infrared ◽  
Sugar Content ◽  
Infrared Region ◽  
Total Sugar ◽  
Mid Infrared ◽  
Total Sugar Content ◽  
Near Infrared Spectra

Multivariate data treatments were applied to mid and near infrared spectra of glucose, fructose and sucrose solutions in order to specify near infrared frequencies that characterise each carbohydrate. As a first step, the mid and near infrared regions were separately studied by performing Principal Component Analyses. While glucose, fructose and sucrose could be clearly identified on the similarity maps derived from the mid infrared spectra, only the total sugar content of the solutions was observed when using the near infrared region. Characteristic wavelengths of the total sugar content were found at 2118, 2270 and 2324 nm. In a second step, the mid and near infrared regions were jointly studied by a Canonical Correlation Analysis. As the assignments of frequencies are generally well known in the mid infrared region, it should be useful to study the relationships between the two infrared regions. Thus, the canonical patterns obtained from the near infrared spectra revealed wavelengths that characterised each carbohydrate. The OH and CH combination bands were observed at: 2088 and 2332 nm for glucose, 2134 and 2252 nm for fructose, 2058 and 2278 nm for sucrose. Although a precise assignment of the near infrared bands to chemical groups within the molecules was not possible, the present work showed that near infrared spectra of carbohydrates presented specific features.

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