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4-HYDROXYPHENYLACETIC ACID >98% puriss for synthesis …

Several soil testing methods have been tried for predicting crop needs for Fe fertilizers. Of several extractants tested for exchangeable Fe, sodium acetate (NaC2H3O2) and EDDHA—ethylenediamine-N,N'-bis(2-hydroxyphenylacetic acid) —correlated best with plant growth. Chelating extractants, including EDDHA, DTPA (diethylene triamine pentaacetic acid), and mixtures such as DTPA plus CaCl2 (calcium chloride) also have been tested and have been somewhat useful. The universal extractant, Mehlich-3, has been used in several states as an extractant. Iron availability is largely dependent on many soil and environmental factors, such as soil pH and bicarbonate concentration, in addition to the extractable amount of Fe; therefore, it is improbable there will be a very reliable soil test method until these factors are better understood. It might be more useful to have information on soil pH and bicarbonate content of the soil sample and relate that information to Fe availability.

CAS No. 156-38-7, 4-hydroxyphenylacetic acid Price _ …
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In grasses, phytosiderophores (organic acids) are synthesized by the plant root and released into the rhizosphere, where they form complexes with Fe. The phytosiderophere-plus Fe complex is moved across the membrane in the root.

4-hydroxyphenylacetic acid the latest price quotation, CAS NO

4-Hydroxyphenylacetic acid, 98% -J&K Scientific
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Plant tissue analyses for Fe are problematic to interpret unless the leaves have been rinsed in dilute acid or detergent. This problem arises because Fe is ubiquitous in dust and can be a contaminant on the surface of plant leaves. Most tests rely on analysis of young leaves from the upper parts or extremities of the plants. Young leaves are chosen because Fe, once deposited in the leaf tissue, is not readily re-translocated; hence, older leaves of deficient plants may have a relatively high concentration of Fe. Young leaves of most plants should contain about 50 parts per million (ppm) Fe, or greater on a dry weight basis (Table 1). Deficient plants will have leaves with less than 30 ppm Fe and will likely exhibit the chlorosis typical of Fe-deficient plants.

In addition, total phenolic content (TPC) was measured with high values observed for all samples, especially for fruits skins with a TPC of 619.6 and 640.3 mg gallic acid equivalents/g extract respectively for apple and plum.

2-Hydroxyphenylacetic acid - Chem-Impex International

CAS No.614-75-5,2-Hydroxyphenylacetic acid Suppliers
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Where organic matter is present in soils, Fe may be present in its reduced state as Fe++ in the soil solution or adsorbed onto soil particle surfaces. Organic matter in soils plays a major role in the availability of Fe to plants. Biochemical compounds or organic acids (aliphatic acids or amino acids) and complex polymers (humic and fulvic acids) can form soluble complexes with Fe, or act as chelating agents and thereby increase Fe availability to plants (chelating agents are organic compounds that complex with Fe and help hold Fe in more soluble forms).

Following a 2 h incubation of the digesta with the Caco-2/HepG2 co-cultures, approximately 10–15% of ferulic, dihydrocaffeic, and dihydroferulic acids and 3–5% of 3-hydroxybenzoic, 3-hydroxyphenylpropionic, and coumaric acids were observed in the basolateral side, whereas 3-hydroxyphenylacetic acid, phenylpropanoic acid, and cinnamic acid were not detected.

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