chemicals9

  What is nanofiltration? The burst of filtration and filtration-related activity that followed the development of the phase-inversion process for the manufacture of polymeric membranes, in the early 1960s, led to the establishment of three membrane separation processes: reverse osmosis, ultrafiltration and, more recently, microfiltration. These processes took the separation spectrum from the traditional cut point limit of standard filtration of around 0.01 mm (10 μm) to the very finest distinct solids, a few nanometres in size, and enabled the separation of large molecules from solution. The actual size ranges vary somewhat from source to source, but there is general agreement that microfiltration covers the range 10 μm down to 0.1 μm, while ultrafiltration covered 0.1 μm down to 0.005 μm (5 nm) in terms of discrete particles or Molecular Weight Cut-Off (MWCO) figures of 300,000 down to around 300 Daltons for dissolved materials. Reverse osmosis, of course, was designed to retain the

  When your factory is running at full speed, trying to ship a product or fulfill an order, the last thing you want is a conveyor belt running off course. Unfortunately, sometimes even the slightest movement or change on a conveyor can throw the belt off track. Misalignment of idlers or rollers, improper joints, and material accumulation are just some of the reasons that can cause your conveyor belt to deviate from the track. Sometimes, minor collisions with heavy machinery and even weather -- strong winds, frost, and sun exposure -- can interfere with your  conveyor belt   path. Potential danger of running off course If found and corrected in time, the conveyor belt deviation will hardly damage the conveyor. However, other types of damage may occur if it is not detected or corrected. If the conveyor belt continuously hits the frame, it will not only damage the frame, but also may scrape off the conveyor belt layer by layer until it is worn out. Conveyor belt width will also be affecte

    One-third of a person's life is spent in bed, among the many pieces of furniture, there is no furniture as long as the bed and the relationship between people, are so close. In today's emphasis on people-oriented everywhere, the "bed", a carrier of a happy life, its comfort or not is pivotal. For people with mobility problems, the role of the bed is even more unusual for people with functional disabilities who need to be in bed. They need a bed with special functions, we call it a "nursing bed". So,   nursing beds , are you using the right one? Sickbeds & Nursing Beds   In the early days, the function of nursing beds was relatively single, but as the standard of living improved, the aging population proliferated, people's needs for different ways of care, and the pursuit of quality of care,  nursing bed manufacturers  found business opportunities, and multifunctional nursing beds were born to meet the different needs of individuals.   MAIN FUNCTI

    Velcorin , also known as dimethyl dicarbonate, is a preservative approved by the Ministry of Health and complies with the Food Sanitation Law of the People's Republic of China and the Food Additive Sanitation Management Measures. The molecular formula is C4H6O5, and the relative molecular mass is 134.09. The boiling point is 172 ° C, at room temperature, it is a slightly astringent colorless liquid, usually used in beverage cans. DMDC has a broad-spectrum antibacterial effect. Its main target microorganisms are yeasts (including Saccharomyces cerevisiae, Zygosaccharomyces ruckerii, Rhodotorula, Candida, Pichia, Toluobacillus, Torula, Endosporium, Klerkia, Hansenula, etc.). It also has a disinfecting effect on many other bacteria (such as Acetobacter pasteurianus, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, various lactobacilli, Pediococcus beer). DMDC has also been shown to kill E. coli 0157:H7. The antibacterial effect of DMDC is the result of inactivating

  Construction projects require a great amount of detail and can take months or years to complete. An important part of the construction process is ensuring you choose the right structure design and materials.For example   spc floor , vinyl flooring , manhole cover , thread bar , aluminum building materials , plywood , vanities   and so on. You must consider the foundation and various natural elements before incorporating certain additional items into the building.   When building multi-story buildings, you should think about how people are going to access each floor. Stairs are a natural choice, but it is also wise to install an elevator   because it ’ s faster, more convenient, and it considers people with disabilities and mobility limitations.   What is an Elevator? An elevator is a platform that could either be open or closed and is used for lifting or lowering both people and goods to upper and lower floors. In the past, it was not mandatory for story buildings to have elevators.

    Solar energy begins with the sun.   Solar panels   (also known as "PV panels") are used to convert light from the sun, which is composed of particles of energy called "photons", into electricity that can be used to power electrical loads.   Solar panels can be used for a wide variety of applications including remote power systems for cabins, telecommunications equipment, remote sensing, and of course for the production of electricity by residential and commercial solar electric systems.   On this page, we will discuss the history, technology, and benefits of solar panels. We will learn how solar panels work,  how they are made, how they create electricity, and where you can buy solar panels.   A Short History of Solar Panels The development of solar energy goes back more than 100 years. In the early days, solar energy was used primarily for the production of steam which could then be used to drive machinery. But it wasn't until the discovery of the "pho