Solubility also depends on the attraction of ___ to each other. Because of its many Oxygen-Hydrogen bonds. Why is sucrose a very polar molecule? weak There is a very ___ dipole-induced dipole attraction between an oxygen molecule (O2) and water (H2O). Hydrofluoric acid Glass is very sol...
Currently, natural product chemistry has evolved to be an interdisciplinary area of science, concerned with the isolation, characterization and determination of the biological activity of the pure phytochemicals. These active components, generally referred to as secondary metabolites, include phenolics, terpe...
(Bronsted-Lowry theory allows a substance to be either an acid or a base depending upon its interaction.) Conjugate Pairs: The two species with an A in them are called conjugate pairs. After the H+ has gone from the acid, A− remains. It is called the conjugate base of the acid....
We propose explicit and implicit approaches for the teaching of acid-base chemistry based on research into the history and nature of science (NoS). To support these instructional proposals, we identify four rationales for students to understand acid-base processes: daily life, socio-scientific, ...
ABSTRACT We developed and validated a new instrument, called Measuring Concept progressions in Acid-Base chemistry (MCAB) and used it to better understand the progression of undergraduate students' understandings about acid-base chemistry. Items were developed based on an existing learning progression fo...
and Biological Chemistry at Nanyang Technological University (Singapore). She obtained her Ph.D. at California Institute of Technology. She was responsible for admission to National University of Singapore. Her research directions focus on Nucleic...
How to use hyaluronic acid in your skincare routine, step by step: 1. Start with a clean slate Overall, anoil cleanseris your best bet for a deep cleanse that doesn’t strip the skin.Oil attracts oil, making it ideal for gently removing impurities like excess sebum, waterproof makeup, ...
This increased epidermal thickness aims to counter the excessive TEWL. Simultaneously, an increased synthesis of SC lipids is evoked, such as cholesterol and ceramides, and constituents of the natural moisturizing factor (NMF), namely urea, pyrrolidone carboxylic acid, lactic acid, urocanic acid, and...
Especially toxic are the powerful mycotoxins such as citrinin, ochratoxins and the well-known aflatoxin, which are produced by Aspergillus species and can lead to immunotoxicity in humans. Shikimic Acid Derived Compounds These specialized metabolites, as its name suggest, are derived from the shikimic...
As the exhaled air from the suspect flows past one side of the fuel cell, the platinum oxidizes any alcohol in the air to produce acetic acid, protons and electrons. The electrons flow through a wire from the platinum electrode. The wire is connected to an electrical-current meter and to ...