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Fixation and Sectioning01:03

Fixation and Sectioning

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Two basic types of preparation are used to visualize specimens with a light microscope: wet mounts and fixed specimens.
The simplest type of preparation is the wet mount, in which the specimen is placed in a drop of liquid on the slide. A liquid specimen can be directly deposited on the slide using a dropper. Solid specimens, such as skin scraping, can be placed on the slide before adding a drop of liquid to prepare the wet mount. Sometimes the liquid is simply water, but stains are often added...
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Processing-Induced Variations in Bamboo Leaf Powder: Effects of Fixation Methods on Color Stability, Volatile

Qi Wang1,2, Zhaojun Wang1,2, Qiuming Chen1,2

  • 1State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China.

Foods (Basel, Switzerland)
|November 27, 2025
PubMed
Summary
This summary is machine-generated.

Fixation methods significantly impact bamboo leaf powder quality. Baking best preserved volatile compounds and sensory attributes like grass and fruit notes, while blanching offered superior color stability.

Keywords:
GC-MS/Obamboo leaf powdercharacteristic odorsdynamic changesthermal processing

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Area of Science:

  • Food Science
  • Plant Biochemistry
  • Sensory Analysis

Background:

  • Fixation is crucial for bamboo leaf powder quality, influencing color, aroma, and taste.
  • Understanding fixation's impact is key to developing superior bamboo leaf powder products.

Purpose of the Study:

  • Determine optimal fixation conditions (steaming, baking, blanching) for bamboo leaf powder.
  • Analyze the effects of fixation on color, enzyme inactivation, and volatile organic compounds (VOCs).

Main Methods:

  • Optimized steaming (120s), baking (60s), and blanching (30s) for bamboo leaf powder.
  • Assessed chlorophyll content, color parameters (a* values, ΔE), and enzyme inactivation.
  • Analyzed VOCs using GC-MS, GC-O, and ROAV to identify key aroma contributors.

Main Results:

  • Baking (BBL) retained the highest VOC abundance (15.67%), followed by steaming (SBL, 5.73%) and blanching (BCBL, 5.48%).
  • Blanching (BCBL) demonstrated the best color stability (ΔE = 0.66).
  • Key aroma compounds (hexanal, nonanal, linalool, α-ionone) contributed green, fresh, and floral notes; BBL preserved grass, fruity, and woody attributes.

Conclusions:

  • Fixation methods significantly influence bamboo leaf powder's sensory characteristics and color stability.
  • Baking is optimal for preserving aroma-active compounds, while blanching excels in color retention.
  • Findings provide a theoretical basis for producing high-quality bamboo leaf powder.