Methylene diphenyl diisocyanate (MDI) is an aromatic di isocyanate. Three isomers are common, varying by the positions of the isocyanate groups around the rings: 2,2′-MDI, 2,4′-MDI, and 4,4′-MDI. The 4,4′ isomer is most widely used, and is also known as 4,4′-diphenylmethane diisocyanate. [3] . This isomer is also known as Pure MDI.

Following Google's Material Design guidelines for system icons, MDI is our largest library, touting over 7200 unique icons!

MDI（ Media Dependent Interface ，介质相关/有关接口）也称为上行链路端口，一般用于PC上的NIC（ 网络接口卡 ）或集成NIC端口的以太网端口连接。 当NIC的传输信号要传输到集线器或网络交换机的接收信号上时，需通过一根 直通电缆 连接MDIX端口。

2025年1月30日 · Diisocyanates are well known dermal and inhalation sensitizers in the workplace and have been documented to cause asthma, lung damage, and in severe cases, fatal reactions. Worker exposures are already subject to protective controls in occupational settings.

2024年10月23日 · Watch the American Lung Association video to learn the correct way to use your Metered-Dose Inhaler (MDI).

2021年8月13日 · MDI口是快速以太网100BASE-T定义的与介质有关接口（Media Dependent Interface）。 MDI 是指通过收发器发送的100BASE-T信号，即100BASE-TX、FX、T4或T2信号。 将集线器连接网络 接口 卡时， 其发送和接收对通常是相互连接的。

2024年5月9日 · This document addresses the use of methylene diphenyl diisocyanate (MDI) and related compounds (See Appendix 1) in products that may result in consumer and general population exposures, particularly in or around buildings, including homes and schools.

An MDI is a handheld aerosol device that uses a propellant to deliver medicine to the lungs. The advantages of MDIs include: It is easy to carry around. It can deliver multiple doses. There is a low risk of bacterial contamination. The disadvantages include: The need for correct, coordinated use of the inhaler.

Biomonitoring methylene dipheny diisocyanate (MDI) in urine may be useful in industrial hygiene and exposure surveillance approaches toward disease (occupational asthma) prevention, and in understanding pathways by which internalized chemical is excreted.

MDI child forms are an essential element of Multiple-Document Interface (MDI) applications, as these forms are the center of user interaction. In the following procedure, you'll use Visual Studio to create an MDI child form that displays a RichTextBox control, similar to …