Solar drying of West Indian ginger (Zingiber officinale Roscoe) rhizome using a wire basket dryer

Balladin, Derrick A; Yen, I.Chang; McGaw, D.R.; Headley, O.

doi:10.1016/0960-1481(95)00137-9

Cited by 24 publications

(11 citation statements)

References 1 publication

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“…This result is in agreement with that obtained by Puengphian and Sirichote (2008). An increase in TPC a er drying has been attributed to the liberation of bound phenolic compounds by the breakdown of cellular tissues (Haard and Values are means ± SD (n = 2) Values in the same column with diff erent superscripts mean that the values are signifi cantly diff erent (p < 0.05) 1996) and the formation of new compounds such as shogaols and zingerone (Balladin et al, 1996;Ali et al, 2008;Wu et al, 2010). The increase in the TPC a er drying was higher for pretreated samples.…”

Section: Total Phenolic Contentmentioning

confidence: 99%

“…This might be due to the conversion of 6-gingerol to 6-shogaol during drying (Balladin et al, 1996;Ali et al, 2008;Wu et al, 2010). The amount of 6-shogaol in dried ginger was higher than that of the un-dried ginger (Balladin et al, 1996;Jolad et al, 2005). Dugasani et al (2010) investigated the eff ect of major non-volatile compounds in ginger, i.e., gingerols and 6-shogaol, on their DPPH radical scavenging potential.…”

Section: Antioxidant Activitiesmentioning

confidence: 99%

“…It has been reported that TPC and antioxidant activity of ginger increased a er drying (Puengphian and Sirichote, 2008). This is due to the conversion of 6-gingerol, which is the most abundant component in the fresh ginger rhizome, to 6-shogaol during drying (Balladin et al, 1996;Ali et al, 2008;Wu et al, 2010). Dugasani et al (2010) reported that 6-shogaol has exhibited more potent antioxidant properties than gingerols; the scavenging potential was in the order of 6-shogaol > 10-gingerol > 8-gingerol > 6-gingerol.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Pretreatments and Drying Temperatures on Drying Characteristics, Antioxidant Properties and Color of Ginger Slice

Thuwapanichayanan¹,

Phowong²,

Jaisut³

et al. 2014

Acta Univ. Agric. Silvic. Mendelianae Brun.

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To reduce the adverse eff ects of hot air drying, ginger slices were pretreated prior to drying. The eff ects of 2 pretreatment methods (blanching versus dipping in 0.1% ascorbic acid solution) and drying temperatures (60, 70 and 80 °C) on the drying characteristics and the qualities of the dried ginger slices in terms of total phenolic content (TPC), antioxidant activities (DPPH and ABTS methods) and color were investigated. It was noted that the moisture content for both un-pretreated and pretreated samples decreased more rapidly when drying was performed at higher drying temperatures. However, the drying time of un-pretreated and pretreated samples was not signifi cantly diff erent. The TPC and antioxidant activities of the ginger slices increased markedly a er drying. The increase in these values was higher for pretreated samples. The dried ascorbic acid solution dipped sample exhibited the highest values of TPC and antioxidant activity. Moreover, the total color diff erence of the ascorbic acid solution dipped ginger was slightly lower than the total color diff erence of the un-pretreated ginger. However, the tested drying temperatures, ranging from 60 to 80 °C, did not aff ect the fi nal TPC, antioxidant activities, and color of the ginger samples.

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Section: Total Phenolic Contentmentioning

confidence: 99%

Section: Antioxidant Activitiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Pretreatments and Drying Temperatures on Drying Characteristics, Antioxidant Properties and Color of Ginger Slice

Thuwapanichayanan¹,

Phowong²,

Jaisut³

et al. 2014

Acta Univ. Agric. Silvic. Mendelianae Brun.

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“…The percentage moisture content was calculated by expressing the loss in weight according to Balladin's formula. [14] Plant Extraction Extraction of the essential oil. Essential oil was extracted by a hydrodistillation process.…”

Section: Plant Materialsmentioning

confidence: 99%

Antioxidant Activity of the Essential Oil and Oleoresin ofZingiber OfficinaleRoscoe as Affected by Chemical Environment

Bellik

Benabdesselam

Ayad

et al. 2013

International Journal of Food Properties

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Three different biochemical test systems were chosen based on their solubility to study the antioxidant activity of ginger extracts. Reducing power and DPPH . scavenging activity tests were considered to produce hydrophilic environments and the H 2 O 2 test was considered as creating a lipophilic environment. The average yields were 10.23 ± 1.02% and 0.48 ± 0.19% for oleoresin and essential oil, respectively. The content of total phenols was 67.6 ± 1.08 mg GAE/g of dry extract. In terms of EC 50 , in hydrophilic environment standards, it showed the highest effects compared to ginger extracts, with oleoresin presenting more activity than essential oil. In contrast, except for quercetin, essential oil showed the best scavenging activity in inhibiting H 2 O 2 compared to all other antioxidants. The present work demonstrated that, when using reducing power, DPPH· free radical scavenging and H 2 O 2 scavenging assays, the same ginger extracts exhibit different antioxidant activities, which were affected not only by the extract itself but also by the chemical environment (hydrophilic/lipophilic).

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“…Verificou-se um aumento da degradação do 6-gingerol e formação do 6-shogaol ao longo da secagem, apresentando-se mais acentuada na temperatura de 70ºC quando comparada à 50ºC (Figura 36). Os resultados mostraram-se compatíveis com os apresentados por outros trabalhos com gengibre (JOLAD et al, 2004;JOLAD et al, 2005;BALLADIN et al, 1996;SCHWERTNER & RIOS, 2007;HE et al, 1998).…”

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Influência da secagem sobre compostos medicinais e de pungência do gengibre

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Solar drying of West Indian ginger (Zingiber officinale Roscoe) rhizome using a wire basket dryer

Cited by 24 publications

References 1 publication

Effects of Pretreatments and Drying Temperatures on Drying Characteristics, Antioxidant Properties and Color of Ginger Slice

Effects of Pretreatments and Drying Temperatures on Drying Characteristics, Antioxidant Properties and Color of Ginger Slice

Antioxidant Activity of the Essential Oil and Oleoresin ofZingiber OfficinaleRoscoe as Affected by Chemical Environment

Influência da secagem sobre compostos medicinais e de pungência do gengibre

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