JY/T 0073-2011Woody dicotyledon stem cross-section (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009 "Guidelines for Standardization Work_Part 1. Structure and Preparation of Standards" this standard replaces JY 73-1982 "Technical Conditions for Transverse Cutting of Woody Dicotyledons". In addition to editorial changes, major technical changes such as under.

-Eliminate the "slice thickness within 15 microns" which is difficult to inspect;

-Cancel the classification of the original qualified products into first-class products and second-class products.

Please note that some elements of this standard may involve patents. The issuer of this standard is not responsible for identifying these patents.

This standard was proposed by the National Technical Committee for Standardization of Teaching Instruments (SAC/TC125).

This standard is under the jurisdiction of the National Technical Committee for Standardization of Teaching Instruments (SAC/TC125).

Standard JY 73-1982 drafting unit. Wuhan Teaching Instrument Factory.

The main drafter of standard JY 73-1982. Liu Yiqin.

This standard was drafted. Teaching Instrument Research Institute of the Ministry of Education.

1 Scope

This standard specifies the type designation, requirements, test methods, inspection rules, signs, instructions, Packaging, transportation and storage.

This standard applies to cross-section slide specimens of woody dicotyledonous stems for teaching in primary and secondary schools.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document.

JY 0026 -1991 teaching instrument and teaching equipment product model naming method JY/T 0067 -2011 General requirements for biological slide specimens

3 Model designation

4 Requirements

4.1 Slides and coverslips, appearance, specimen collection and processing, specimen staining, and specimen covers should comply with JY/T 0067-2011 Chapter 4.

4.2 Specimens should be taken from three-year-old alder branches.

4.3 The epidermis, cork layer, thick-horned tissue, cortex, phloem, formation layer, xylem, pith and pulp can be seen clearly.

4.4 The epidermis may fall off, but it should not exceed 3/4.

4.5 Three complete annual rings should be visible in the xylem.

4.6 Calcium oxalate crystals can be seen in the cells of the cortex, phloem, and myeloid.

4.7 Specimens are stained with crocus and solid green, or other multiple staining methods. Mechanical tissues, xylem ducts, and other tissue structures should be distinguished.

obvious.

4.8 The gap between cortex and phloem or phloem and xylem should not exceed 1/3.

4.9 There are no more than three minor contaminations on the specimen.

5 Test method

5.1 According to the provisions of Chapter 5 of JY/T 0067-2011.

5.2 Specimens shall be examined at a microscope magnification of 40 times.

6 Inspection rules

6.1 Implementation of the relevant provisions of Chapter 6 of JY/T 0067-2011.

6.2 In this standard 4.2, 4.3, 4.4, 4.5, 4.7, 4.8 and 4.9 are the main performance indicators.

7 Signs, instructions, packaging, transportation and storage

Should comply with the relevant provisions of Chapter 7 of JY/T 0067-2011.