Equivalent Fractions Videos: #4 Khan Academy Fractions Tutorial: An easy way to showcase basic equivalent fraction concepts with (what else?) pizza! #5 Brainpop Fractions: If your school has an account, this is a fun video. #6 Equivalent Fractions on a Number Line: I didn’t even know t...
Converting fractions to decimalsHow to express a fraction as a decimalkhanacademyMath Video Arithmetric
Mixed numbers and improper fractionsConverting mixed numbers to improper fractions and improper fractions to mixed numberskhanacademyMath Video Arithmetric
Equivalent fractionsIntroduces the concept of equivalent fractionskhanacademy
Standard stock solutions of 1 mg/mL were prepared with HPLC-grade methanol and kept at 4 °C. All standards were filtered through a 0.22μm syringe filter before HPLC analysis. The standard samples were diluted with HPLC-grade methanol to provide a series of different concentration ranges for ...
HPLC grade acetonitrile and methanol were purchased from Thermo-Fisher Scientific (Waltham, MA, USA). Formic acid 98%, ammonium hydroxide, and ammonium formate were purchased from Sigma-Aldrich Co. (St. Louis, MO, USA), XTT [2,3-bis(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carbo...
by Xin Zhang 1, Zhongqin Li 1,2,3, Feiteng Wang 1, Mengyuan Song 1, Xi Zhou 4,* and Jing Ming 51 State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Tianshan Glaciological Station, Chinese Academy of Sciences, Lanzhou 730000, China ...
Analytical grade piperine and piperlongumine standards (≥97.0% purity) purchased from TCI Europe N.V. (Zwijndrecht, Belgium) were used as standard compounds. 4.4.2. Agar Disk Diffusion Method Gram-positive and Gram-negative bacteria representing potential human pathogenic bacteria were used to ...
Piper guineense is a food and medicinal plant commonly used to treat infectious diseases in West-African traditional medicine. In a bid to identify new antibacterial compounds due to bacterial resistance to antibiotics, twelve extracts of P. guineense fr