JY/T 0070-2011Terminal shoot (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 70-1982 "Technical Conditions for Top Bud Slitting". In addition to editorial changes, the main technical changes are as follows.

-Eliminate the "slice thickness within 8µm" which is difficult to inspect;

-Elimination of single dyeing requirements;

-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 70-1982 drafting unit. Wuhan Teaching Instrument Factory.

The main drafter of standard JY 70-1982. 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, marks, instructions, packaging, and transportation of the top bud longitudinal section.

And storage.

This standard is applicable to the primary bud longitudinal slit slide specimens 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 the top buds of Hydrilla verticillata, and the middle part of the buds should be cut longitudinally, and one piece of material is placed on each slide.

4.3 The growth cone, leaf primordia, young leaves, axillary bud primordia, and bud axis are clearly shown.

4.4 The original set of cells in the outermost layer of the growth cone should be neatly arranged. The original cells in the original set are not aligned and have a large volume.

4.5 There should be no obvious "plasma separation" in the cells of the growth cone and young leaves.

4.6 The young leaves should be completely wrapped on the growth cone.

4.7 The morphology of the cells at the growth cone should be normal.

4.8 The shaft of the buds shall not show obvious damage or wrinkles.

5 Test method

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

5.2 Specimens are examined at a microscope magnification of 100 times.

6 Inspection rules

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

6.2 In this standard, 4.3, 4.4, 4.5, 4.7 and 4.8 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.