JY/T 0191-2011Root longitudinal model (English PDF)

3.1 Naming rules

The model name of the product is JY 0026-1991.

3.2 Nomenclature

The root profile model is named.

SM-GZP-D-520

Product height, 520mm Product feature code, monocotyledon Product name Pinyin prefix, "root longitudinal profile" Product model classification code, biological model Model example.

SM-GZP-D-520 represents a biological model, a root profile model, a monocotyledon, and a height of 520mm.

4.1 Use environmental conditions

Temperature. -10 °C ~ 40 °C, relative humidity. not more than 90%.

4.2 Anatomy

4.2.1 General requirements

4.2.1.1 The product should use the root tip of monocotyledonous corn as a reference material, showing the anatomical structure of the root tip. Model height is not less than 520mm, put on the stand.

4.2.1.2 Make different longitudinal sections in the middle of the root tip to highlight the vascular column, showing the root crown, meristematic zone (growth point), elongation zone, mature zone (root Hair area) and the original formation layer.

4.2.1.3 The maturity zone shall be layered (stepped) cross-section.

4.2.1.4 The characteristics of various types of cells should be obvious and correct, and the transition should be natural. Allows slightly imperfect colors or spray transitions or Location is slight.

4.2.2 Specific requirements

4.2.2.1 Root canopy. The height is about 13% of the height of the model, and it looks like a cap. Cells are large, irregularly shaped and loosely arranged, with worn surfaces shape.

4.2.2.2 Meristematic area. The height is about 19% of the model height. It should show the characteristics of square cells, large nuclei, small volume, and close arrangement without gaps.

4.2.2.3 Elongation zone. The height is about 35% of the model height. It should be shown that the cells develop from square, rectangular, and long rectangles. And shows young ducts Continuous relationship with mature ducts.

4.2.2.4 Mature area. Shows longitudinal and transverse sections of the epidermis, cortex, and vascular columns.

4.2.2.4.1 Epidermis. Shows the outermost layer of thin-walled cells and the root hairs protruding from the outer wall of the cells. Root hair should be no less than 30, and the developmental sequence is shown from short to long, at least two of which are longitudinally cross-sectioned and show nucleoli.

4.2.2.4.2 Cortex. Inside the epidermis, outer cortical cells (one to two layers), cortical thin-walled cells (multilayer, loosely arranged) and Endothelial cells (one layer, neatly arranged).

4.2.2.4.3 Vascular columns. The longitudinal and cross-sectional views of ring-shaped conduits, threaded conduits and perforated conduits, and screens shall be shown on the longitudinal section. three the thick-walled part of the catheter is shown in red. The xylem and phloem in the vascular column on the cross section should be arranged alternately.

4.2.2.5 The following parts of the model shall be affixed with name or number tags. root canopy, meristematic zone, elongation zone, mature zone, epidermis, outer cortex, endothelial layer, Vascular columns, catheters.

4.3 Materials and processes

4.3.1 The model shall be made of rigid PVC material, and the root hair may be made of soft plastic. Glass fiber reinforced plastic (FRP) or Fragile and deformable materials.

4.3.2 The content of heavy metals in the coating of the model shall conform to GB 5.2.5.4 of GB 21746-2008.

4.3.3 The cross section of the model should be neat, the structures indicated should be accurate, the decoration should be natural and correct, and the bonding and splicing should be firm.

4.3.4 The spray color transition in each area should be natural and there should be no spillage.

4.3.5 The product shall also comply with JY 0001-2003 sections 5.2, 6.9, 6.12, 6.27, 7.4.3, 7.7 and 9.1 to 9.6.

4.4 Environmental test

4.4.1 The product shall be tested for temperature, humidity, and free drop in accordance with JY 0213-1994 Section 3.1, and shall be subjected to a drop test in an unpackaged state.

4.4.2 The drop height of the drop test in the non-packaging state is 1m. The drop surface shall be the largest surface of the model outline. After the test, it shall not be broken or cracked.

If there is a stand, it should not be included.

5.1 Relevant dimensions

Measured with a steel ruler with a division value of 1 mm.

5.2 Anatomy, appearance and workmanship

Sensory test.

5.3 Environmental test

5.3.1 Temperature, humidity and free fall test According to JY 0213-1994 Section 4.1, 4.2, 4.6.

5.3.2 Drop test in unpacked state. Lay a wooden board with a thickness of 20mm ± 3mm on the cement floor, and keep the board rigidly connected to the cement floor touch. During the test, the model's falling surface is downward, and it will fall freely from a height of 1m. Once tested, it shall meet 4.4.2.

6.1 Inspection classification

The inspection of this product is divided into factory inspection, type inspection and quality supervision inspection.

6.2 Inspection items

The inspection items and methods of factory inspection and type inspection are shown in Table 1.

Table 1 Inspection items and methods of factory inspection and type inspection

Item No. Inspection Item Standard Provisions Factory Inspection Type Inspection

1 General requirements 4.2.1 -

2 Specific requirements 4.2.2 -

3 Materials and processes 4.3 -

4 Environmental test 4.4--Note. "-" in the table means all inspection items, and "-" means no inspection items.

6.3 Sampling method

6.3.1 The factory inspection shall be batched according to the natural batch of delivery, and the type inspection shall be batched according to the stock array.

6.3.2 During the factory inspection, all the inspection items shall be inspected first, and the sampling inspection items shall be inspected among the qualified products.

6.3.3 The samples for type inspection shall be taken from the products that passed the factory inspection.

6.3.4 The sampling methods for factory inspection and type inspection shall be in accordance with JY 0002.

6.4 Non-conformance determination

6.4.1 The judgment of sampling inspection shall be in accordance with JY 0002.

6.4.2 The failure criterion of a single sample shall be in accordance with JY 0002.

6.4.3 The factory inspection shall be determined according to the unqualified criterion of a single sample.

6.4.4 The main performance indicators of this standard are 4.2, 4.3.1, 4.3.2 and 4.3.3.

6.5 Review rules

6.5.1 Unqualified products can be submitted for inspection again after rework.

6.5.2 If the cause of the batch failure is a sampling inspection item, the item shall be changed to a full inspection during the re-inspection.

6.6 Quality supervision inspection

Quality supervision and inspection shall be in accordance with JY 0002.