Preliminary enzymolysis studies on trace element extractability from food

Crews, Helen M.; Burrell, J. A.; McWeeny, David J.

doi:10.1002/jsfa.2740340917

Cited by 50 publications

(19 citation statements)

References 37 publications

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“…Details of the wet digestion procedure used in this work have been reported previously (Crews et al, 1983). In brief, however, the total amount ofCa, Mg, Zn, Fe, Cu, Mn and Ni in each of the three types of soya produce was determined in the following manner.…”

Section: Trace Element Analysismentioning

confidence: 99%

“…An important stage in obtaining a better understanding of the bioavailability of a metal is to determine how much is released from a given food in soluble form under the conditions found in the gastro-intestinal tract. There are many problems associated with in vivo studies and consequently a number of in vitro techniques have been developed to investigate the release of metals from foods (Narasinga Rao & Prabhavathi, 1978;Furuya, Sakamoto & Takahashi, 1979;Schricker, Miller & van Campen, 1982;Crews, Burrell & McWeeny, 1983.…”

Section: Introductionmentioning

confidence: 99%

“…One such technique (Crews et a/., 1983(Crews et a/., , 1985 has been used in this work to investigate the release of calcium, magnesium, zinc, iron, copper, nickel and manganese from three different types of soya product.…”

Section: Introductionmentioning

confidence: 99%

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Release of metals from soya products by the action of some gastric and intestinal enzymes

Robe

Williams

Crews

et al. 1986

Int J of Food Sci Tech

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Measurements have been made of the amount of calcium, magnesium, zinc, iron, copper, manganese and nickel released into solution from three types of soya product prior to, and following the use of, in vitro enzymatic degradation procedures. The amount of solubilized metal has been shown to depend upon the enzymes used, the metal under consideration, the pH and the type of soya being studied. Such experiments may help to improve understanding of the behaviour of metals released from soya by the action of enzymes in the gastro‐intestinal tract.

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Section: Trace Element Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Release of metals from soya products by the action of some gastric and intestinal enzymes

Robe

Williams

Crews

et al. 1986

Int J of Food Sci Tech

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“…The simulated parameters representative of the human digestive tract include stomach and small intestinal pH and chemistry, soil-to-solution ratio, stomach mixing, and stomach emptying rates. Several in vitro methods have been developed (Miller et al 1981;Crews et al 1983;Ruby et al 1993;Hack and Selenka 1996). All of the PBET models involve simulated gastric extraction with pepsin and with a mixture of pancreatin, amylase and bile salt in the intestinal stage.…”

Section: Introductionmentioning

confidence: 99%

Uptake of heavy metals by vegetable plants grown on contaminated soil and their bioavailability in the human gastrointestinal tract

Intawongse

Dean

2006

Food Additives and Contaminants

278

129

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Lettuce, spinach, radish and carrot were grown on compost that had previously been contaminated at different concentrations of Cd, Cu, Mn, Pb and Zn. Control plants of each vegetable were also grown on unadulterated compost. The experiment was carried out under greenhouse conditions. Mature plants were harvested and their roots and leaves collected. Soil samples from each growing pot and plant materials were acid digested and analysed to determine total metal concentration. Flame-Atomic Absorption Spectroscopy (FAAS) was employed to determine metal concentrations in soil and plant samples (Mn and Zn), while Cd, Cu and Pb in plant materials were analysed by Differential Pulse Anodic Stripping Voltammetry (DP-ASV). Soil (BCR 146R and GBW 07310) and plant (tea leaves, INCT-TL-1) certified reference materials were used to assess accuracy and precision. The edible part of plants, i.e. the leaves of lettuce and spinach and the roots of radish and carrot, were also extracted using an in vitro gastrointestinal (GI) extraction to assess metal bioavailability. The results showed that the uptake of Cd, Cu, Mn and Zn by plants corresponded to the increasing level of soil contamination, while the uptake of Pb was low. Soil-to-plant transfer factor (TF) values decreased from Mn ) Zn > Cd > Cu > Pb. Moreover, it was observed from this investigation that individual plant types greatly differ in their metal uptake, e.g. spinach accumulated a high content of Mn and Zn, while relatively lower concentrations were found for Cu and Pb in their tissues. From the in vitro gastrointestinal (GI) study, results indicate that metal bioavailability varied widely from element to element and according to different plant types. The greatest extent of metal releasing was found in lettuce (Mn, 63.7%), radish (Cu, 62.5%), radish (Cd, 54.9%), radish (Mn, 45.8%) and in lettuce (Zn, 45.2%).

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“…Borch and coworkers [Borch et al, 1994] are developing an in vitro system for evaluating lead and arsenic bioavailability. Their assay is based on accepted techniques in nutrition [Crews et al, 1983;Crews et al, 1985;Miller et al, 1981] and involves sequential leaching in simulated gastrointestinal environments.…”

Section: Ingested Mineralsmentioning

confidence: 99%

Eat, breathe, and be wary: Mineralogy in environmental health

Guthrie¹

1995

Reviews of Geophysics

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With the growing public interest in environmental issues, the geological sciences face exciting new research opportunities. Some environmental problems are obviously geological in nature (e.g., the use of hydrology to understand the migration of contaminants). However, many environmental problems that can benefit from the application of geological principles are not so obvious. A prime example is the evaluation of the impact of minerals on human health, which would typically be viewed as a biological problem. This topic encompasses many possible issues (see, e.g., the series of articles in the January 1994 issue of Geotimes [Nuhfer, 1994; Ross and Skinner, 1994; Skinner and Ross, 1994; Smith, 1994]), but this review will focus on two that involve the interactions of minerals with biological systems: inhaled minerals and ingested minerals. Much of the review, in fact, focuses on the first of these two topics, not because it is more important or has been the focus of a greater number of studies but because it provides an excellent example of the wide range of possible research opportunities for mineralogists and geochemists. The exclusion of topics such as radon from this review is not meant to dismiss the potential impact geoscientists can have on these topics, rather it is simply not possible (within a short review) to cover all of the geoscience issues in the health sciences.

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Preliminary enzymolysis studies on trace element extractability from food

Cited by 50 publications

References 37 publications

Release of metals from soya products by the action of some gastric and intestinal enzymes

Release of metals from soya products by the action of some gastric and intestinal enzymes

Uptake of heavy metals by vegetable plants grown on contaminated soil and their bioavailability in the human gastrointestinal tract

Eat, breathe, and be wary: Mineralogy in environmental health

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