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Drying Shrinkage01:21

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When hardened concrete is exposed to air with a relative humidity of less than 100 percent, it begins to lose the free water within its capillaries. As this water evaporates, the water initially adsorbed onto the calcium silicate hydrates migrates towards these now empty spaces and eventually evaporates as well. Over time, as more water leaves, the volume of the concrete decreases, a phenomenon known as drying shrinkage.
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Fabric Moisture Uniform Control to Study the Influence of Air Impingement Parameters on Fabric Drying Characteristics
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Optimization of drying process parameters for cauliflower drying.

Manoj Kumar Gupta1, V K Sehgal2, Sadhna Arora2

  • 1Central Institute of Post Harvest engineering and Technology, P.O. P.A.U. Campus, Ludhiana, Punjab India.

Journal of Food Science and Technology
|January 16, 2014
PubMed
Summary
This summary is machine-generated.

Optimizing cauliflower dehydration involves careful control of temperature and airflow velocity. These factors significantly impact drying time, vitamin C retention, and browning, crucial for preserving quality.

Keywords:
CauliflowerDryingDrying characteristicsOptimizationRSM

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Area of Science:

  • Food Science
  • Agricultural Engineering

Background:

  • Dehydration is a key preservation method for vegetables like cauliflower.
  • Understanding the impact of process parameters on quality attributes is essential for effective food processing.

Purpose of the Study:

  • To investigate the effects of drying parameters on cauliflower quality.
  • To optimize the thin-layer dehydration process for hybrid cauliflower variety no. 71.

Main Methods:

  • Hybrid cauliflower (variety no. 71) of varying sizes (3-5 cm) was dehydrated using thin-layer drying.
  • Drying temperatures (55-65°C), air velocities (40-60 m/min) were applied.
  • Analyzed for vitamin C content, rehydration ratio, and browning.

Main Results:

  • Drying time was influenced by cauliflower size, temperature, and velocity.
  • Rehydration ratio was significantly affected by the combined effect of temperature and airflow velocity.
  • Vitamin C content was primarily affected by temperature, while browning depended on temperature, velocity, and their interaction.

Conclusions:

  • Optimized dehydration parameters (60.10°C, 59.28 m/min, 3.35 cm size) yielded desirable outcomes.
  • Predicted optimal responses included a drying time of 491.22 min, 289.86 mg/100g Vitamin C, a rehydration ratio of 6.91, and browning of 0.14.
  • A desirability factor of 0.787 indicates successful optimization of the cauliflower dehydration process.