God's crown is one of the plants with various components flavonoid as these components, which an abundant plant metabolite component in nature that significantly functions for plant's growth and antioxidants. This study aimed to examine The Concentration Variation Effect 70% Ethanol Extract from Crown (Phaleria Macrocarpa) Towards Physical Stability Cream Preparations by variating extract conce...

High-rate algal ponds (HRAP) are an alternative to conventional wastewater treatment that could contribute the circular economy by valorising reclaimed water and biomass. This short communication presents removal of nutrients contaminants emerging concern (CEC) in a pilot-scale HRAP treating primary municipal wastewater. Average total organic carbon, nitrogen, NH4-N, phosphorus PO4-P, was 67%, ...

Eric Macy, MD, (top), works in the Department of Allergy in the San Diego Medical Center, as well as being a Partner Physician with the Southern California Permanente Medical Group, and an Assistant Clinical Professor of Medicine at the University of California, San Diego. E-mail: [email protected]. Michael Schatz, MD, MS, (left), has been at Kaiser for 25 years and is currently Chief of the D...

Four polymorphic forms of methyl paraben (methyl 4-hydroxybenzoate, 1), denoted 1-I (melting point 126 °C), 1-III (109 °C), 1-107 (107 °C), and 1-112 (112 °C), have been investigated by thermomicroscopy, infrared spectroscopy, and X-ray crystallography. The crystal structures of the metastable forms 1-III, 1-107, and 1-112 have been determined. All polymorphs contain the same O-H···O=C connecte...

A stability-indicating, robust, fast, and user friendly reversed-phase high-performance liquid chromatographic (RP-HPLC) assay method has been developed and validated for the analysis of commercial raw material batches of methylparaben, ethylparaben, propylparaben, and butylparaben. These four parabens are widely used as preservatives in pharmaceutical and cosmetic products. Accurate assay valu...