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Results 801 - 850 of 1142
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Engman J - - 1998
Fish from fresh, brackish and marine waters were analysed for their levels of Pb, Cd, Cr, Ni, Co, Zn, Cu, Mn, As and Se in muscle tissue. Various quality control procedures were implemented during the survey and the results were compared with those from several other surveys, most of which ...
Boisson F - - 1998
Bioaccumulation of lead in the mussel Mytilus galloprovincialis from 210Pb-labeled bulk seawater (dissolved and particulate pathways combined) was examined over 21 days. The lead bioaccumulation factor (BAF) at equilibrium was estimated to be 211 +/- 10 ml g-1. This value was two orders of magnitude lower than BAFs reported in ...
Van den Brink N W - - 1998
In The Netherlands the European badger Meles meles is presently recovering from earlier declines in numbers. The rate of recovery, however, varies between regions. It is argued that the effects of traffic accidents cannot account for the differences in recovery between regions. It is further shown that the population recovery ...
Krachler M - - 1998
With inductively coupled plasma-mass spectrometry (ICP-MS), the 18 trace elements Ba, (Be), (Bi), Cd, Co, Cs, Cu, La, Li, Mn, Mo, Pb, Rb, (Sb), (Sn), Sr, (Tl), and Zn were quantified in the digests of 13 formulas based on cow milk, of two formulas based on soy protein, of two ...
Zhang Z W - - 1998
It is known that, unlike Japanese, Koreans or southern Chinese who depend on rice as a major source of energy for daily life, people in north-eastern China rely not only on rice, but on wheat and other cereals and to a lesser extent also on pulses. Cereal and pulse samples ...
Svenes K B - - 1998
OBJECTIVE: The purpose of this work was to study the distribution of nickel within lung tissue obtained from nickel-exposed people and to evaluate the use of only one single sample for determination of the nickel burden of the lung. METHODS AND MATERIALS: The material used was lung tissue obtained from ...
Narisawa S - - 1998
Fosphenytoin, a water-soluble prodrug of phenytoin, degrades primarily to phenytoin at pH values <8 during long term storage; phenytoin readily precipitates when formed from fosphenytoin due to its limited aqueous solubility. The objective of this study was to develop stable formulations of fosphenytoin in the pH range of 7.4-8. 0 ...
Hopkins W A - - 1998
A number of recent studies have linked developmental, physiological, and behavioral abnormalities in amphibians to coal combustion wastes (coal ash). Few studies, however, have determined trace element concentrations in amphibians exposed to coal ash. In the current study we compare total body concentrations of 20 trace elements in adult southern ...
Melgar M J - - 1998
Cadmium content of 97 samples of some edible wild mushrooms, corresponding to 13 different species, was determined by graphite furnace atomic absorption spectrophotometry. Influence of some factors (species and ecology, morphological portion, and traffic pollution) and the importance of mushrooms as a dietary source of this heavy metal have been ...
Apostoli P - - 1998
Art glass manufacturing is one of the most interesting examples of exposure to complex mixtures. Among the raw materials used are silica sand, borax, carbonates, nitrates of Ca, Na, K, and a great number of compounds that are mainly oxides of As, Sb, Al, Zn, Cr, Ni, Sn, Se, Cd, ...
Watanabe T - - 1998
In 1996, peripheral blood samples and 24-h food duplicate samples together with samples of wheat, rice, foxtail millet and maize were collected from 50 non-smoking women each from Jinan (a provincial capital) and Baiquan (a nearby basically self-sustaining farming village) in China. The samples were analyzed for cadmium (Cd) contents ...
Wildgust M A - - 1998
The temporal variation of Polonium-210 (210Po) was examined in coastal sea water, the mussel Mytilus edulis, the winkle Littorina littorea and green alga Ulva lactuca in order to investigate the entry of 210Po into the marine food chain. More than 99% of 210Po in the water column occurred in the ...
Parsons E C - - 1998
The territorial waters of Hong Kong are highly contaminated with anthropogenic pollutants, including trace metals. Hong Kong's population of Indo-Pacific hump-backed dolphins (Sousa chinensis) inhabits an area where a high volume of sewage waste discharge and the close proximity of contaminated mud pits mean a considerable potential for trace metal ...
Moon C S - - 1998
OBJECTIVE: The present study was initiated to investigate the validity of cadmium (Cd) and lead (Pb) in urine in comparison with the metals in blood as a biological marker of nonoccupational exposure of general populations to these metals as environmental pollutants. DESIGN: Peripheral blood samples, morning spot-urine samples, and 24-h ...
Charbonneau J E - - 1998
Scanning electron microscopy (SEM) and x-ray microanalysis (EDS) were used to conduct forensic investigations on metal and glass foreign objects. SEM-EDS is an excellent method for identifying metal foreign objects in food, such as wire, dental fillings, bone, and metal packaging, based on their element composition. From a determination of ...
Tahvonen R - - 1998
The lead and cadmium contents of carbonated beverages, juices, beers and wines were determined by ETAAS using Zeeman background correction, peak height mode and the method of standard additions for quantitation. Other beverages were digested in conc. HNO3, but wines were diluted with 10% HNO3. The lead contents of beverages ...
Zhang Z W - - 1998
In total, 45 adult women in Manila, the Philippines, volunteered to participate in the study by offering peripheral blood samples and 24-h total food duplicate samples. In addition, they offered raw (uncooked) rice as well as wheat flour and maize starch from the kitchen. Lead (Pb) and cadmium (Cd) in ...
Kim C - - 1998
The aim of this study is to investigate the cadmium (Cd) exposure level from traditional food in Fort Resolution, Northwest Territories. We used 24-h dietary recalls and traditional food use frequency to obtain information on traditional food consumption, and analysed cadmium concentrations in traditional food. We also estimated total cadmium ...
Farago M E - - 1998
Increasing Pt concentrations from vehicle catalysts have been reported from a number of countries. Analysis of Pt and Pd in soils and road dusts taken from areas of high and low traffic flows in SE England show concentrations of Pt in the range < 0.30-40.1 ng g-1 and Pd in ...
Müller M - - 1998
The cadmium intake of adults in Germany was calculated within the framework of market basket studies. Data were available on cadmium content of representative food assortments from 1988 and 1991. Food intake data were obtained within the second MONICA (MONItoring trends and determinants in CArdiovascular disease) survey 1988 and the ...
Sandström B - - 1998
The Nordic countries have issued common nutrition recommendations since 1980. In connection with the 3rd revision, a joint working group of nutritionists and toxicologists assessed the toxicology of selected trace elements. Values for upper limits of intake were established for iron, zinc, iodine and selenium. The safety factors between the ...
Stanek K - - 1998
OBJECTIVE: To determine the amount of lead ingested in food by means of duplicate diet collections, nutrient intakes, and anthropometric measurements of young children. DESIGN: Once a month for a year, data were collected from 24-hour duplicate diets, hand wipes, a dust index, and anthropometric measurements. Quarterly, venous blood samples ...
Suturović Z J - - 1998
A method for determination of zinc, cadmium, lead and copper in wines by means of potentiometric stripping analysis (PSA) is described. Cadmium, lead and copper are determined directly, whereas the zinc determination is possible only after the wine samples decomposition. The results for five red and white Yugoslav wines are ...
Iversen B S - - 1998
Molybdenum creatinine levels in urine were measured in 128 Danish inhabitants by ICP-MS in order to establish reference intervals of molybdenum in urine for the Danish population as a part of the EURO-TERVIHT project (Trace Element Reference Values in Human Tissues). The Mo concentration was determined using the isotopes 95Mo ...
Ruangwises N - - 1998
Concentrations of seven heavy metals were determined in green mussels (Perna viridis) collected between April and June 1995 from eight locations along the costal area of the Gulf of Thailand. The average concentrations (n = 96) of the heavy metals detected in mussel samples, on the basis of dry weight, ...
Ponce R A - - 1998
The compilation of existing data on contaminants in the marine food chain is essential in addressing concerns regarding the magnitude of potential human exposures and in the evaluation of subsistence food safety. This paper presents a summary of studies on trace metals in tissues of Alaska marine mammals from the ...
Monaci F - - 1998
Tissues obtained from Stenella coeruleoalba stranded along the Spanish and Italian Mediterranean coasts from 1987 to 1994 were analysed for cadmium (Cd), copper (Cu), mercury (Hg), selenium (Se) and zinc (Zn). The age, length and weight of the dolphins were recorded. Hg levels were also assayed in skin biopsies from ...
Songchitsomboon S - - 1998
The levels of intake and food sources of zinc and copper in 231 20-80 yr old healthy adults living in Bangkok and surrounding districts were determined. Dietary data from 3-d food records collected and validated at Research Center, Ramathibodi Hospital were analyzed. Levels of zinc and copper intake were compared ...
Tripathi R M - - 1997
Concentrations of heavy metals such as Pb, Cd, Cu and Zn have been estimated in air particulates, water and food samples collected from different suburbs in Bombay during 1991-1994. The concentrations of these metals are translated into intake rates through inhalation and ingestion pathways. Results indicate the highest concentration of ...
Berg T - - 1997
Atmospheric trace element deposition in Norway has been evaluated by using data from a national moss survey from 1995, comprising 53 elements in 458 samples of the ground growing moss Hylocomium splendens. The results are compared with similar surveys carried out in 1977, 1985 and 1990 in order to evaluate ...
Zhang Z W - - 1997
In 1996, 24-h food duplicate samples were collected from two groups of 50 non-smoking women each; one group was in Jinan, the capital city of Shandong Province in China, and the other in a farming village in the Zhangqiu area some 30 km away from the city. The people in ...
Schofield R M - - 1997
We examined Drosophila spp. using a penetrative ion microprobe technique that allows us to quantify element contents in whole organs and organisms. Comparatively non-penetrative techniques, such as electron microscopy, could not have been used to make many of these measurements because material is lost during sectioning. We found that zinc ...
De Boeck G - - 1997
Juvenile common carp were exposed for 28 days to three different sublethal copper concentrations (0.20 microM, 0.55 microM, and 0.80 microM). Food consumption was monitored on a daily basis during the exposure period, while growth, copper accumulation, energy stores, and nucleic acid contents were assessed weekly. Copper exposure to 0. ...
Gomot A - - 1997
Bioaccumulation analyses of copper and zinc were carried out in two snail subspecies (Helix aspersa aspersa and Helix aspersa maxima) after 3 months of controlled farming (out of ground) with foods of different formulations. The results reveal some clear interspecific differences in affinity toward copper and zinc. For the two ...
Reeves P G - - 1997
Because of inherent genetic and physiological characteristics, the natural concentration of cadmium in the kernels of sunflowers grown in uncontaminated soils of the northern Great Plains region of the United States is higher than in most other grains. We tested the hypothesis that a habitual consumption of sunflower kernels will ...
Gonzalez M - - 1997
Mexico city has a very high pollution index. Based on the view 'that salivary monitoring can be extended to environmental pollutants', we performed this study in order to determine not only the concentrations of lead and cadmium in human saliva, but also to establish their possible association with some socio-demographic ...
Elsenhans B - - 1997
1 Although food intake is among the most important routes of Cd exposure, not many details are known about the intestinal absorption mechanisms of Cd. In this respect Cd is representative of most other nonessential, merely toxic metals. 2 Based on a concept of two distinguishable steps, intestinal absorption of ...
Gomot A - - 1997
The effects on survival and growth of exposure to cadmium (Cd) in the food were analyzed in juvenile snails (age one month, mean weight 1 g) of the two subspecies Helix aspersa aspersa (H.a.a.) and H. aspersa maxima (H.a.m.). The experiments lasted for four weeks and the animals were fed ...
Comella C L - - 1997
The Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS) assesses the character and severity of cervical dystonia (CD). We developed a teaching tape of the TWSTRS scoring for the motor symptoms of CD. The tape provides investigators with visual representations of each component of the motor section of the TWSTRS as ...
Karita K - - 1997
Thirty-six workers exposed to low or moderate levels of lead at low temperature refining processes were surveyed to examine the route of lead intake. Blood lead level (BPb), delta-aminolevulinic acid in urine, lead in facial skin wipes (Face-Pb) and lead in fingernails (Nail-Pb) were measured and their personal hygienic behavior ...
Wicklum D - - 1997
The effects of cadmium on the hatching success of thecocoons of the freshwater predatory leech Nephelopsis obscura wereexamined together with the survivorship of hatchlings, changes in 96-hLC50 with biomass, preference-avoidance responses and changes inactivity. The 96-h EC50 for cocoons was 832.6 microg Cd/L with adecreasing bounded monotonic function best describing ...
Barbeira P J - - 1997
The determination of traces of Zn, Pb and Cu in rum samples by anodic stripping voltammetry without previous treatment or addition of a supporting electrolyte, using a hanging mercury drop electrode, is described. The choice of an appropriate stripping voltammetric method and deposition potential minimizes the influence of the organic ...
Lintschinger J - - 1997
The practice of sprouting is widely used to improve the nutritional value of grain seeds. Several nutritive factors such as vitamin concentrations and bioavailability of trace elements and minerals increase during germination. The objective of this work was to study the enrichment of various essential trace elements during germination of ...
Ikeda M - - 1997
The objective of the present study was to examine if environmental exposure to cadmium (Cd) had any impact on the integrity of the liver among the general Japanese population. A nationwide survey was conducted in the winter seasons of 1991-1995 in 15 prefectures in Japan to collect 24-h food duplicates, ...
Scheuhammer A M - - 1997
Ca, P, Al, and trace metal (Cu, Ni, Zn, Cd, and Pb) concentrations were measured in several aquatic invertebrate taxa used as food by breeding insectivorous waterfowl, sampled from three sites in eastern Canada with widely varying water chemistry. Ca concentrations were highest in molluscs (snails and clams), averaging 200-300 ...
Zhang Z W - - 1997
OBJECTIVES: To assess and compare the background exposure of the general population to lead (Pb) and cadmium (Cd) in China and in Japan. METHODS: Food duplicates and peripheral blood samples were collected from nonoccupationally exposed subjects, viz 202 Chinese women in four Chinese cities (Beijing, Shanghai, Nanning, and Tainan) and ...
Soengas J L - - 1996
The capacity of carbohydrate and ketone bodies metabolism in brain and liver was evaluated in fed and food-deprived Atlantic salmon (Salmo salar) in a time period covering from 1 to 7 days (Experiment I), and in Atlantic salmon food deprived for 6 weeks, and food deprived for 4 weeks and ...
Zhang Z W - - 1996
Rice samples consumed by local populations were collected between 1990 and 1995 in 17 areas in the world, mostly from Asia (10 areas), but also from 7 areas outside of Asia. In total, 1528 samples were obtained (about one half from Japan) and were analyzed for lead (Pb) by electrothermal ...
Minami T - - 1996
The effects of cadmium on the peak area of metallothionein (MT) protein were studied by capillary zone electrophoresis with a polyacrylamide-coated tube at neutral pH. When cadmium was added to a commercial standard MT-1 isoform prepared from rabbit liver, the peak are of the MT-1 isoform decreased in a time- ...
Linde A R - - 1996
Copper, lead, and cadmium pollution were measured in water and sediments of two Northern Spanish rivers: Piles and Pigäeña. Liver contents of these heavy metals were analyzed in two fish species (eel, Anguilla anguilla, and brown trout, Salmo trutta) collected from the same locations. Significant levels of heavy metal pollution ...
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