Evaluation of solar dried thyme (Thymus vulgaris Linné) herbs

A Review on Solar Drying of Agricultural Produce

“…Air is drawn through the dryer by natural convection or sometimes by a fan. It is heated as it passes through the collector and then partially cooled as it catches moisture from the material [24][25][26][27]. The material is heated both by the air and sometimes directly by the sun.…”

“…The thermal energy transfer occurs when a material changes from solid to liquid, or liquid to solid. Initially, these solid-liquid PCMs perform like conventional storage materials; their temperature rises as they absorb heat [26]. PCMs absorb and release heat at a nearly constant temperature.…”

“…Headley [26] Corn Solar assisted heat pump in store dryer -To reduce the moisture content of the corn from 16.6% to 14.5% (w.b), elapsed drying time was 240 hr.…”

Infusions from Thymus vulgaris L. treated at different gamma radiation doses: Effects on antioxidant activity and phenolic composition

“…the antioxidant potential of the species can be increased (Alothman, Bhat and Karim, 2009). The intention of these studies is to follow the process from the irradiation until the consumer and to study the impact of this industrial process on the main components of herbal infusions (DeRutier and Dwyer, 2002) Thyme (Thymus vulgaris L.) is an herbaceous and perennial aromatic plant belonging to the Lamiaceae family, commonly consumed as herbal infusion and as a condiment and spice (flavoring agent) (Balladin & Headley, 1999;Helmy, Farrag & Hasaballah, 2015).…”

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“…Borage petals were distributed uniformly in a thin layer on trays and dried in a hot air convective oven (Memmert, Schwabach) at 50°C for 60, 90, 105 and 120 minutes. This temperature was chosen because it is a common temperature used in other drying studies of flowers and herbs (Balladin and Headley, 1999;Chen et al, 2000;Mao et al, 2006). Relative humidity and temperature values were measured at different points in the hot air convective oven with portable thermo-hygrometers (Hanna Instruments, HI 9564, Woonsocket) and digital thermometers (Hanna Instruments, HI 98509, Woonsocket), respectively.…”