Identification of orange peel
Identification (1) The product is yellowish to yellowish brown in color. There are numerous parenchyma tissues in the mesocarp, with irregular cell shapes, uneven wall thickening, and some with beaded shapes. Peel epidermal cells are polygonal, square-like or rectangular in appearance, and the perirradial wall is thickened. The pores are round and 18 to 26 μm in diameter. The epithelial cells are not clear; the lateral view is exocypris, and the radial wall of the outer wall is thickened. . Calcium oxalate crystals are present in parenchyma parenchyma cells and are polyhedral, rhombohedral or bipyramidal, 3 to 34 μm in diameter and 5 to 53 μm long. Some cells contain parallel double crystals consisting of two polyhedrons or 3 ~ 5 square crystals. Most of the hesperidin crystals are present in parenchyma cells, yellow or colorless, round or amorphous masses, and some can be seen as radial stripes. Threads, holes and reticulate conduits and tracheids are small. (2) Take 0.3g of the product powder, add 10ml of methanol, heat reflux for 20 minutes, filter, take the filtrate 5ml, and concentrate to about 1ml, as the test solution. Another hesperidin reference substance, add methanol to make a saturated solution as a reference solution. According to thin layer chromatography (Appendix VI B) test, 2 μl of each of the above two solutions was pipetted and spotted on the same silica gel G thin plate prepared with 0.5% sodium hydroxide solution, with ethyl acetate-methanol-water (100 :17:13) For developer, spread about 3cm, remove, air dry, and use toluene-ethyl acetate-formic acid-water (20:10:1:1) as the developing solution to develop to about 8cm. Take out, dry, spray with aluminum trichloride test solution, set the UV lamp (365nm) to view. In the chromatogram of the test sample, fluorescent spots of the same color appear on the positions corresponding to the chromatogram of the reference substance. Chromatographic conditions and system suitability test octadecylsilane bonded silica gel as a filler; methanol - acetic acid - water (35:4:61) as the mobile phase; detection wavelength of 283nm. The number of theoretical plates should not be less than 2,000 based on the hesperidin peak calculation. Accurately weigh the amount of hesperidin reference substance in the preparation of the reference solution, and add methanol to make a solution containing 0.4 mg per 1 ml. Preparation of the test solution to take the product coarse powder about 1g, accurately weighed, set Soxhlet extractor, add petroleum ether (60 ~ 90 °C) 80ml, heat reflux 2 ~ 3 hours, discarded petroleum ether, dregs Swirl dry, add 80ml of methanol, and then heat to reflux until the extract is colorless, let cool, filter, place the filtrate in a 100ml volumetric flask, wash the container several times with a small amount of methanol, filter into the same volumetric flask, add methanol to the mark Shake well, that is, too. Assays were prepared by precisely drawing 5 μl of the reference solution and the test solution into a liquid chromatograph. Calculated on dry products, including hesperidin (C28H34O15) not less than 3.5%.
We have a variety of designs for Intercom System With Tuya, different sizes, different keys, etc., you can refer to our pictures,
We have been focusing on independent research and development of intercom system with tuya
since 2011. We have professional reach and devolve team to serve you, and we can provide you with professional products and services, If you need more information about our factory or intercom system, please do not hesitate to contact us, we are very honored to share catalog with you.
Smart doorphone with tuya is an intercom system that can be connected to a mobile phone. The system adopts a unified TCP/IP networking architecture to connect all-digital video intercom, security equipment and elevator linkage system. At the same time, it can be connected to the central management machine. The property community can better manage tenants, improve user experience and property services, etc. They use POE switches to connect multiple indoor units and video door phones, and POE switches supply power to the indoor units. The wiring is very simple and convenient, and the overall cost is low.
Smart doorphone with tuya improves user experience, because users can receive call information, and can monitor Video Door Phone at any time through tuya application, even if users are in an office, picnic or travel, they can immediately receive call information from visitors , and talk to them, you can also monitor visitors. If it is the user's friend, it can also remotely unlock the visitor on the mobile phone, which is very convenient.
The video doorphone in the picture is the most popular model from our company - MK-AZZJ4C, we have adopted the embedded design, which is very classic and beautiful. It is also an Android system, which can support simultaneous connection of multiple indoor units and mobile phones to realize remote monitoring, calling and unlocking on the mobile phone. We have also added the function of face recognition and LED fill light, which can clearly monitor and unlock using face recognition even at night. Ideal for multi-apartment, hotel and community applications.
The following are the parameters of MK-AZZJ4C for your reference:
1. 4.3 inch 720 HD display TCP/IP Intercom system
2. Calling, intercom, unlocking, monitoring
3. High quality aluminium alloy frosted panel + high-end glass lens + sensor buttons
4. Digital camera, stable and clear image shooting
5. Night vision and bright light compensation function
6. Full duplex voice intercom, comparable to ordinary telephone intercom
7. Android system ,ARM CPU, TUYA App (support Android and IOS system)
8. LPDDR3 1 GB memory, standard EMMC 8 GB storage expandable
9. RJ45 standard ethernet interface all-digital design
10. Low power consumption technology solution, saving energy and long life span
11. Dimension:400*140*51(mm)
12. Install method : Wall/flush install (390*130*46 mm)
13. Image/video advertising playback (advertising can be customized)
14. Door opening:IC/ID card/ password/ face recognition/ mobile phone
Our company has been focusing on intercom system for 11 years, we can provide you with different systems, like IP, 2 wire and 4 wire system, and we are also OEM & ODM factory, support to customize your brand and function, Thank you very much for your interest in our products, if you need more detailed information, please feel free to contact me.
Smart Doorphone With Tuya,Tuya Smart Doorbell,Tuya Video Doorbell,Tuya Smart Video Doorbell Zhuhai Mingke Electronics Technology Co., Ltd , https://www.mingke-tech.com