Differentiation Between Humic and Non-Humic Substances Using Alkaline Extraction and Ultraviolet Spectroscopy.

Background: Although humic substances are the principal ingredients in processed humic products, there has been no practical way to determine if a material is humified, allowing fake products to be used by farmers instead of genuine humic substances.

Objective: To develop a test method using conventional laboratory techniques to determine if a material is humified.

Method: A neutralized extract is prepared using the standardized extraction protocols specified in ISO 19822:2018(E).

Incidence of injury in adult elite women's football: a systematic review and meta-analysis.

Aim: To estimate the incidence of injury in adult elite women's football and to characterise the nature and anatomical location of injuries.

Design: Systematic review and meta-analysis.

Data Sources: Combinations of the key terms were entered into the following electronic databases (PubMed, SPORTDiscus, Science Direct and Discover) from inception to May 2021.

A new standardized method for quantification of humic and fulvic acids in humic ores and commercial products.

Increased use of humic substances in agriculture has generated intense interest among producers, consumers, and regulators for an accurate and reliable method to quantify humic acid (HA) and fulvic acid (FA) in raw ores and products. Here we present a thoroughly validated method, the new standardized method for determination of HA and FA contents in raw humate ores and in solid and liquid products produced from them. The methods used for preparation of HA and FA were adapted according to the guidelines of the International Humic Substances Society involving alkaline extraction followed by acidification to separate HA from the fulvic fraction.