JY/T 0193-2011Dicotyledon stem model (English PDF)

3.1 Naming rules

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

3.2 Nomenclature

The dicotyledonous stem model is named.

SM - ZWJ - SH - 160

Product height, 160mm Product feature code, dicotyledon (herb) Product name Pinyin prefix, "plant stem" Product model classification code, biological model Model example.

SM-ZWJ-SH-160 stands for biological model, dicotyledonous plant stem model, 160mm high.

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 shall use the sunflower stem as the reference material, showing the structure of the vertical and transverse sections of the dicotyledonous herb. Model straight 330mm 20mm;

The cross-section is about 1/3 of the stem, and the longitudinal section is a radial longitudinal cut with a height of 160mm ± 10mm.

4.2.1.2 The cell surface view and different sections shall be shown on the model. The morphology, structure and location of the cells in each part should be correct, and some living cells should be Show nucleus. The color of each part structure should be different.

4.2.2 Specific requirements

4.2.2.1 The cross section shows the epidermis, cortex, vascular bundles (primary phloem, mesenchymal layer, and primary xylem), pith and pith rays. among them External ductile vascular bundles should show six and a half. The diameter of each vascular bundle is 70mm ± 3mm at the maximum and 50mm ± 3mm at the minimum.

Plates, sieve holes and companion cells, and correctly show the interface between the forming layer in the bundle and the forming layer between the bundles.

4.2.2.2 One side of the longitudinal section is cut longitudinally by the medullary rays and the other side is cut longitudinally through the middle of the vascular bundle. And make a corner on one side of the longitudinal section the stratum corneum, epidermis, and thick-angled tissue were stripped in trapezoidal layers, showing the surface view of cells such as epidermis, thick-angled, and thin-walled.

4.2.2.3 In the longitudinal section through the vascular bundle, ring-shaped catheters, threaded catheters, perforated catheters, sieve tubes, sieve plates, companion cells should be correctly displayed Location and morphological structure. It also shows the morphological and structural characteristics of fibroblasts (phloem fibers), that is, the narrow ends are tapered with thicker walls and smaller Cell cavity.

4.2.2.4 The following parts of the model shall be affixed with name tags or number tags. cuticle, epidermis, thick horn tissue, thin-walled tissue, vascular bundles, pith, pith rays Ring-shaped catheters, threaded catheters, perforated catheters, sieve tubes and companions, forming layers.

4.3 Materials and processes

4.3.1 The model should be made of rigid PVC material, and glass fiber reinforced plastic (FRP) or fragile and deformable materials should not be used.

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 structures represented on the model should be accurate in position and modified naturally and correctly.

4.3.4 The color of the structure of each part should be correct and clear, and the spraying transition should be natural and there should be no spillage.

4.3.5 The longitudinal and transverse sections of the model shall be flat and free of deformation.

4.3.6 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 methods

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 This standard 4.2 (except for slight defects in the color and spray transition or slight inaccuracy in the spray transition), 4.3.1, 4.3.2 and 4.3.5 is the main performance indicator.

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.