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Tina Yu
  • hongkong
  • China, mainland
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Tina Yu posted a blog post

What Is Vitamin C?

Vitamin C, or ascorbic acid, is an important nutrient in many foods, such as oranges, red and green peppers, and kiwi fruit. It is also available in supplementary form.Vitamin C has many important functions in the body, including: Make collagen, an important protein To heal the wound Repair and maintain cartilage, bone and teethIt works as an antioxidant, which means it can neutralise free radicals --…See More
Jun 24
Tina Yu posted a blog post

Legal Status of Glyphosate

In April 2014, the legislature of the Netherlands passed legislation prohibiting sale of glyphosate to individuals for use at home; commercial sales were not affected.In June 2015, the French Ecology Minister asked nurseries and garden centers to halt over-the-counter sales of glyphosate in the form of Monsanto's Roundup. This was a nonbinding request and all sales of glyphosate remain legal in France…See More
Jun 14
Tina Yu posted a blog post

Applications of Coordination Chemistry

Early studies using calcium oxide, carbonate, and carboxylates reported low activities for the polymerization of LA, even in bulk at 120–180 °C. PolyGA and copolymers of GA with CL and L-LA have been prepared using Ca(acac)2, but again high temperatures (150–200 °C) are required. Under these conditions transesterification occurs, although to a lesser extent than in analogous Sn(Oct)2-initiated…See More
Jun 6
Tina Yu posted a blog post

Be Careful Before Using Tadalafil

In-depth prevention and warningDrug warningDo not take tadalafil if you are allergic to any of its contents; If you are taking nitrates (for angina), Riociguat (for pulmonary hypertension) or alpha-blockers; If you have heart problems or stroke, low blood pressure or uncontrolled high blood pressure, if you have ever been blind. Tell your doctor before taking tadalafil…See More
May 28
Tina Yu posted a blog post

Uses of Aniline

Aniline is mainly used to prepare methylene diphenylamine and related compounds by condensation with formaldehyde. The condensation of diamine with phosgene yields methylene diphenyl diisocyanate, which is the precursor of polyurethane polymers.Other uses include rubber-processing chemicals (9 percent), herbicides (2 percent) and dyes and pigments (2 percent). As additives of rubber, aniline derivatives…See More
May 19
Tina Yu posted a blog post

Applications of Sulfamic Acid

Sulfamic acid is primarily a precursor of sweet compounds. It reacts with cyclohexylamine, and then NaOH is added to get C6H11NHSO3Na, cyclamate. Related compounds are also sweeteners, such as potassium acetosulfonate.Sulfonates have been used in the design of a wide range of therapeutic agents, such as antibiotics, nucleoside/nucleotide human immunodeficiency virus (HIV) reverse transcriptase…See More
May 13
Tina Yu posted a blog post

Melamine and Cyanuric Acid Congeners

Melamine is a triamine compound that was first discovered and synthesized in the early 1800s. It is deaminated to the oxytriazine structural analogues Ammeline, Ammelide, and cyanuric acid. Melamine is a chemical compound used in a variety of materials used in cleaning products, dry wipe boards and plastics, among other applications. Melamine is synthesized from urea, requires several purification steps,…See More
May 5
Tina Yu posted a blog post

Salt Splitting

Sodium sulfate is produced on a very large scale as a by-product of several important industrial processes. In many cases, disposal of this material is difficult. As a result, there have been many efforts to use electrolytic salt splitting to recover both sulfuric acid and sodium hydroxide. Because of major technical and economic problems, none of these efforts has been successful. The…See More
May 2
Tina Yu posted a blog post

Is Melamine Dishware Safe?

One of our most common interactions with melamine is in our kitchen. It could be in our cupboards, plastic or cutlery. Melamine cutlery is a combination of melamine and formaldehyde, also known as melamine resin. Melamine cutlery is generally considered safe because melamine does not migrate into most foods. However, melamine can slowly migrate into food and drink under extreme conditions, including…See More
Apr 21
Tina Yu posted a blog post

How safe is propylene glycol?

The FDA reviews scientific studies and safety trials to determine whether food additives, such as propylene glycol, are safe for use in the body. In 1982, the FDA approved propylene glycol as a safe food additive and considered it a "generally recognized safe" or GRAS ingredient. To that end, the FDA has set strict guidelines to ensure that maximum amounts of propylene glycol used in foods do not…See More
Apr 8
Tina Yu posted a blog post

Fine Chemical Manufacturers Embrace Environmental Management

For business, companies and individuals, 2021 Earth Day is a global event to show their support for environmental protection. This year is the 51st year of the event, and the intention behind it, namely the need to actively manage our planet, has never been more important than it is now. April 22 marks the ideal time for all industries, including fine chemical manufacturers, to review their current environmental obligations and invest in a more sustainable future.Earth Day: a history based on…See More
Sep 2, 2021
Tina Yu is now a member of On Feet Nation
Sep 2, 2021

Tina Yu's Blog

What Is Vitamin C?

Posted on June 24, 2022 at 11:53am 0 Comments

Vitamin C, or ascorbic acid, is an important nutrient in many foods, such as oranges, red and green peppers, and kiwi fruit. It is also available in supplementary form.

Vitamin C has many important functions in the body, including:

Make collagen, an important protein

To heal the wound

Repair and maintain cartilage, bone and teeth

It works as an antioxidant, which means it…

Continue

Legal Status of Glyphosate

Posted on June 14, 2022 at 10:26am 0 Comments

In April 2014, the legislature of the Netherlands passed legislation prohibiting sale of glyphosate to individuals for use at home; commercial sales were not affected.

In June 2015, the French Ecology Minister asked nurseries and garden centers to halt over-the-counter sales of glyphosate in the form of Monsanto's Roundup. This was a nonbinding request and all sales of glyphosate remain legal…

Continue

Applications of Coordination Chemistry

Posted on June 6, 2022 at 9:16am 0 Comments

Early studies using calcium oxide, carbonate, and carboxylates reported low activities for the polymerization of LA, even in bulk at 120–180 °C. PolyGA and copolymers of GA with CL and L-LA have been prepared using Ca(acac)2, but again high temperatures (150–200 °C) are required. Under these conditions transesterification occurs, although to a lesser extent than in analogous Sn(Oct)2-initiated…

Continue

Be Careful Before Using Tadalafil

Posted on May 28, 2022 at 12:54am 0 Comments

In-depth prevention and warning

Drug warning

Do not take tadalafil if you are allergic to any of its contents; If you are taking nitrates (for angina), Riociguat (for pulmonary hypertension) or alpha-blockers; If you have heart problems or stroke, low blood pressure or uncontrolled high blood pressure, if you have ever been blind. Tell your doctor before taking… Continue

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