Isolation of humic acid from the brown algaeAscophyllum nodosum, Fucus vesiculosus, Laminaria saccharina and the marine angiospermZostera marina

1996 ◽  
Vol 8 (6) ◽  
pp. 553-562 ◽  
Author(s):  
Amal Radwan ◽  
Geoffrey Davies ◽  
Amjad Fataftah ◽  
Elham A. Ghabbour ◽  
Susan A. Jansen ◽  
...  
Keyword(s):  
Humic Acid ◽  
Fucus Vesiculosus ◽  
Laminaria Saccharina

ВЛИЯНИЕ СЫРОЙ НЕФТИ НА РАННИЕ СТАДИИ РАЗВИТИЯ МАКРОВОДОРОСЛЕЙ БАРЕНЦЕВА МОРЯ, "БОТАНИЧЕСКИЙ ЖУРНАЛ"

2013 ◽  
pp. 903-912 ◽  
Author(s):  
О.В. СТЕПАНЬЯН
Keyword(s):  
Fucus Vesiculosus ◽  
Enteromorpha Prolifera ◽  
Laminaria Saccharina

Изучено влияние эмульсии и пленки нефти на водоросли Баренцева моря. Бурые водоросли ( Fucus vesiculosus и Laminaria saccharina) более устойчивы к токсическому воздействию, чем зеленые (Enteromorpha prolifera). L. saccharina и E. prolifera наиболее уязвимы на стадии гаметогенеза и ювенильного спорофита, F. vesiculosus — на стадии прорастающей зиготы. Установлено, что водоросли Баренцева моря способны существовать в среде, загрязненной нефтью, при этом эмульгированная нефть менее токсична, чем ее пленка. Показано, что степень подвижности и тип движения зооспор L. saccharina и антерозоидов F. vesiculosus не могут являться тестовой реакцией при проведении биотестирования морских вод.

ВОЗДЕЙСТВИЕ НЕФТЯНОЙ ПЛЕНКИ НА ФОТОСИНТЕЗ БУРЫХ ВОДОРОСЛЕЙ БАРЕНЦЕВА МОРЯ, "БОТАНИЧЕСКИЙ ЖУРНАЛ"

2014 ◽  
pp. 1095-1100
Author(s):  
О.В. СТЕПАНЬЯН
Keyword(s):  
Ascophyllum Nodosum ◽  
Fucus Vesiculosus ◽  
Laminaria Saccharina

В полевых экспериментах на литорали Баренцева моря изучено влияние пленки нефти на фотосинтез и дыхание массовых видов бурых водорослей ( Fucus vesiculosus, F. distichus, Ascophyllum nodosum, Laminaria saccharina). Показано, что водоросли в первые часы воздействия нефтяной пленки продолжают поддерживать свою функциональную активность, полусуточный ход фотосинтеза и дыхания остается выраженным и неизменным.

Characterization of dissolved organic matter (DOM) extracted from soils by hot water percolation (HWP)

2010 ◽  
Vol 59 (1) ◽  
pp. 99-108 ◽  
Author(s):  
M. Takács ◽  
Gy. Füleky
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Natural Organic Matter ◽  
Extraction Methods ◽  
Soil Samples ◽  
Hot Water ◽  
Soil Extracts ◽  
Water Percolation ◽  
Soil Humic Acid

The Hot Water Percolation (HWP) technique for preparing soil extracts has several advantages: it is easily carried out, fast, and several parameters can be measured from the same solution. The object of this study was to examine the possible use of HWP extracts for the characterization of soil organic matter. The HPLC-SEC chromatograms, UV-VIS and fluorescence properties of the HWP extracts were studied and the results were compared with those of the International Humic Substances Society (IHSS) Soil Humic Acid (HA), IHSS Soil Fulvic Acid (FA) and IHSS Suwannee Natural Organic Matter (NOM) standards as well as their HA counterparts isolated by traditional extraction methods from the original soil samples. The DOM of the HWP solution is probably a mixture of organic materials, which have some characteristics similar to the Soil FA fractions and NOM. The HWP extracted organic material can be studied and characterized using simple techniques, like UV-VIS and fluorescence spectroscopy.

Changes in the Humic Acid–Metal Complexation Characteristics Depending on Humification Degree / Humīnskābju – Metālu Kompleksveidošanās Rakstura Izmaiņas Atkarībā No Humifikācijas Pakāpes

2012 ◽  
Vol 51 (3) ◽  
pp. 228-237
Author(s):  
D. Dudare ◽  
M. Klavins
Keyword(s):  
Humic Acid ◽  
Stability Constants ◽  
Humic Acids ◽  
Complex Stability ◽  
Peat Layer ◽  
Raised Bog ◽  
Complexing Capacity ◽  
Humification Degree ◽  
Complexation Process ◽  
Complex Stability Constants

The aim of this study is to determine the Cu(II) complexing capacity and stability constants of Cu(II) complexes of humic acids isolated from two well-characterized raised bog peat profiles in respect to the basic properties and humification characteristics of the studied peats and their humic acids. The complex stability constants significantly change within the studied bog profiles and are well correlated with the age and decomposition degree of the peat layer from which the humic acids have been isolated. Among factors that influence this complexation process, molecular mass and ability to form micellar structures (supramolecules) of humic substances are of key importance.

Major and Trace Elements in the Humic Acid

2018 ◽  
Author(s):  
Zoltán Kis ◽  
Katalin Gméling ◽  
Tímea Kocsis ◽  
János Osán ◽  
Mihály András Pocsai ◽  
...  
Keyword(s):  
Trace Elements ◽  
Humic Acid ◽  
Activation Analysis ◽  
Analytical Techniques ◽  
Major And Trace Elements ◽  
Prompt Gamma Activation Analysis ◽  
Prompt Gamma ◽  
Gamma Activation ◽  
X Ray ◽  
Precise Analysis

We present precise analysis of major and trace elements of the humic acid. We used three different element analytical techniques in our investigations as prompt-gamma activation analysis (PGAA), neutron activation analysis (NAA) and X-ray fluorescence (XRF) analysis was carried out. We identified 42 elements in our sample.

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