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Observing a multilaminar structure of the hamster zona pellucida by polarized light microscopy (CAT#: STEM-MIT-0211-LJX)

Introduction

The zona pellucida (zona) is a glycoprotein coat that envelopes the oocyte and embryo, binds sperm during fertilization and facilitates transfer of the embryo through the Fallopian tube. Before implantation can occur, the blastocyst must hatch from the zona. Several lines of evidence suggest that the zona is multilaminar.
The structure can be imaged using a polarized light microscope.




Principle

Polarized light microscopy is a kind of microscope to identify the optical properties of the fine structure of a substance. Any substance with birefringence can be distinguished under a polarizing microscope. The characteristic of a polarized light microscopy is to change ordinary light into polarizing light for microscopic examination in order to identify whether a substance is monorefringent (anisotropic) or birefringent (anisotropic).
1. Monorefractivity and birefringence: When light passes through a substance, if the properties and path of light do not change due to the direction of illumination, this substance has "isotropy" in optics, also known as a single refractor, such as ordinary gases, liquids, and amorphous solids; If the speed, refractive index, absorption, polarization, amplitude, etc. of light passing through another material vary depending on the direction of illumination, this material has "anisotropy" in optics, also known as a birefringent material, such as crystals, fibers, etc.
2. Polarization of light: Light waves can be divided into natural light and polarized light according to the characteristics of vibration. The vibration characteristic of natural light is that there are many vibration planes on the vertical light wave conduction axis, and the amplitude distribution of vibration on each plane is the same. Natural light through reflection, refraction, birefringence and absorption, can be obtained only in one direction vibration of light waves, this light wave is called "polarized light" or "polarized light".

Applications

Study and analysis in mineral, chemistry, biology, botany and other fields

Procedure

1. Sampling
2. Preparation of slices
3. Staining (Select according to the specific experimental situation)
4. Observation

Materials

• Sample Type:
Hamster zona pellucida

Notes

Operate in strict accordance with the operating procedures, and shall not arbitrarily change the operating procedures
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