Journal of trace elements and electrolytes in health and disease最新文献_第9页

Bioavailability of zinc in rats fed on tuna as a protein source in the diet. 以金枪鱼作为蛋白质来源喂养的大鼠锌的生物利用度。

Journal of trace elements and electrolytes in health and disease Pub Date : 1993-03-01

M T García-Arias, A M Castrillón, M P Navarro

{"title":"Bioavailability of zinc in rats fed on tuna as a protein source in the diet.","authors":"M T García-Arias, A M Castrillón, M P Navarro","doi":"","DOIUrl":"","url":null,"abstract":"The objective of this study was to investigate the dietary zinc bioavailability in diets containing raw, cooked, steamed, and canned tuna as a protein source in the diet, and to evaluate different means of preparation, as well as various storage periods of the canned tuna, which was prepared according to industrial standards. Sterilized oil-free canned tuna was also made. The biological assays used for the study of the zinc utilization were carried out on Wistar rats fed with semi-synthetic diets for 12 days varying only in the protein source, which was casein-methionine or tuna provided as follows: raw, cooked in brine, steamed, sterilized with or without soybean oil, canned and stored for one or three years. Body weight, food intake, faecal and urinary zinc excretion, and zinc content in rat liver were monitored. No modifications were shown in food efficiency when diets including tuna were used, compared with those values from the casein-methionine diet. Thus, final body weight results were similar in all groups tested. Dietary zinc absorption was enhanced by consuming a raw white tuna diet. This beneficial effect disappeared after steaming or cooking in brine, but it was slightly recovered after sterilization with oil and storage of the canned tuna. Animals fed on the diets including the oil-free canned tuna, showed two or three times higher faecal and urinary zinc excretion than those fed on casein and canned tuna stored for 0, 1 or 3 years, reaching a negative balance. A negative effect was therefore found in both dietary and endogenous zinc utilization due to the consumption of oil-free canned tuna.","PeriodicalId":77233,"journal":{"name":"Journal of trace elements and electrolytes in health and disease","volume":"7 1","pages":"29-36"},"PeriodicalIF":0.0,"publicationDate":"1993-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19384934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Review of publications. 审查出版物。

Journal of trace elements and electrolytes in health and disease Pub Date : 1993-03-01

引用次数: 0

Concentration of free calcium in erythrocytes of lead-depleted rats. 缺铅大鼠红细胞游离钙的浓度。

Journal of trace elements and electrolytes in health and disease Pub Date : 1993-03-01

A M Loipführer, A M Reichlmayr-Lais, M Kirchgessner

引用次数: 0

Perinatal development of iron and antioxidant defence systems. 围产期铁和抗氧化防御系统的发育。

Journal of trace elements and electrolytes in health and disease Pub Date : 1993-03-01

T Günther, V Höllriegl, J Vormann

引用次数: 0

Transplacental passage and fetal deposition of mercury after low-level exposure to methylmercury--effect of seleno-L-methionine. 低水平甲基汞暴露后经胎盘转运和胎儿汞沉积——硒-l -蛋氨酸的影响。

Journal of trace elements and electrolytes in health and disease Pub Date : 1992-12-01

J B Nielsen, O Andersen

{"title":"Transplacental passage and fetal deposition of mercury after low-level exposure to methylmercury--effect of seleno-L-methionine.","authors":"J B Nielsen, O Andersen","doi":"","DOIUrl":"","url":null,"abstract":"Previous experimental studies on transplacental passage and possible fetotoxicity of methylmercury have almost exclusively used a single dosage or 2-4 repeated doses of mercury on specific days during gestation and often used at relatively high dose levels. In previous studies, selenium supplementation considerably increased the concentration of mercury in the blood of offspring after maternal exposure of rats to methylmercury, whereas whole-body retention and organ deposition of mercury in mice were unaffected. The present study in mice, which involved exposure for 5 weeks to a low dose of methylmercury in the drinking water (1 nmol/ml) before and during pregnancy, demonstrates that mercury is deposited in offspring both in utero and during lactation, and that transplacentally absorbed mercury is not, or only very slowly, excreted. Seleno-L-methionine increased the deposition of mercury in offspring, but the effect was due to slightly higher deposition in the dams. Selenomethionine significantly reduced the kidney deposition of mercury in offspring, whereas liver deposition of mercury was unaffected. These results indicate that interactions between organo-selenium compounds and methylmercury orally administered at low doses is of less importance than previously believed on the basis of experiments with higher doses of selenite injected or supplemented to the diet.","PeriodicalId":77233,"journal":{"name":"Journal of trace elements and electrolytes in health and disease","volume":"6 4","pages":"227-32"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12478198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Detection by HPLC-ICP of metallothionein in serum of an epileptic child with valproate-associated hepatotoxicity. 丙戊酸相关肝毒性癫痫患儿血清金属硫蛋白的HPLC-ICP检测。

Journal of trace elements and electrolytes in health and disease Pub Date : 1992-12-01

P Brätter, R Brunetto, H J Gramm, S Recknagel, H Siemes

引用次数: 0

Review of publications. 审查出版物。

Journal of trace elements and electrolytes in health and disease Pub Date : 1992-12-01

引用次数: 0

The human selenium status in Hungary. 匈牙利的人体硒状况。

Journal of trace elements and electrolytes in health and disease Pub Date : 1992-12-01

G Alfthan, G Bogye, A Aro, J Feher

{"title":"The human selenium status in Hungary.","authors":"G Alfthan, G Bogye, A Aro, J Feher","doi":"","DOIUrl":"","url":null,"abstract":"The selenium concentration of foods and of human blood varies widely between geographical areas depending on the availability of soil Se for plants. The mean serum Se concentration in Europe has been found to vary between 0.80-1.50 mumol/l and the mean Se concentration of wheat between 0.02-0.11 mg/kg. We estimated by various markers the Se status of Hungarians on whom data is lacking. Serum samples (n = 238) from healthy blood donors, and toenails (n = 132) and fingernails (n = 211) from different apparently healthy individuals residing in both urban and rural areas were collected from four districts in Hungary. Wheat samples (n = 29) as grains were obtained directly from farms representing the same areas. Serum Se was determined by electrothermal AAS and the other samples by acid-digestion fluorimetry. The accuracy of the methods was verified by analyzing external reference samples. The mean (+/- SD) serum Se concentration was 0.70 +/- 0.12 mumol/l, ranging between 0.41-1.18 mumol/l. The mean serum Se levels 0.87 mumol/l was significantly (p < 0.001) higher in the East and lower in the South (0.60 mumol/l) compared to the northern area 0.70 mumol/l. The mean (+/- SD) toenail Se concentration was 0.56 +/- 0.18 mg/kg. The Se level in the East was significantly (p < 0.01) higher than the level in the North, 0.68 mg/kg vs. 0.54 mg/kg, respectively, and lowest in the southern area, 0.40 mg/kg. The same pattern applied to fingernails. Wheat Se ranged from 5 to 235 micrograms/kg, with the median 34 micrograms/kg. The lowest Se concentrations were generally found in the South.(ABSTRACT TRUNCATED AT 250 WORDS)","PeriodicalId":77233,"journal":{"name":"Journal of trace elements and electrolytes in health and disease","volume":"6 4","pages":"233-8"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12478199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nickel-, chrom- and cobalt-concentrations in human tissue and body fluids of hip prosthesis patients. 人工髋关节患者人体组织和体液中镍、铬和钴的浓度。

Journal of trace elements and electrolytes in health and disease Pub Date : 1992-12-01

F F Hennig, H J Raithel, K H Schaller, J R Döhler

{"title":"Nickel-, chrom- and cobalt-concentrations in human tissue and body fluids of hip prosthesis patients.","authors":"F F Hennig, H J Raithel, K H Schaller, J R Döhler","doi":"","DOIUrl":"","url":null,"abstract":"The world-wide experience with millions of metallic implantations suggests the biocompatibility of modern alloys, commonly made of cobalt, chromium and nickel. There is, however, little information available on the internal metal exposure resulting from implants. In this study we assessed the metal concentrations in body fluids and tissue samples (muscle, bone) of patients who had undergone total hip replacement. Our patients were divided up into two groups. One group had firmly fixed implants two years after surgery. The other group had loose implants of the same Co-Cr-Mo alloy. Urine analyses revealed an increased renal elimination of nickel, chromium and cobalt. Cobalt and nickel exceeded the upper normal value. In serum the concentrations of nickel and chromium were normal or slightly elevated, the cobalt concentrations were significantly elevated. In some cases tissues adjacent to the implant showed extremely high concentrations of chromium and cobalt. This finding was also obtained in tissues that had no direct contact with the arthroplasty. The findings suggest that alloys of prostheses can undergo corrosion and release metal ions.","PeriodicalId":77233,"journal":{"name":"Journal of trace elements and electrolytes in health and disease","volume":"6 4","pages":"239-43"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12478200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Concentration of free calcium in erythrocytes and liver mitochondria of zinc-depleted rats. 缺锌大鼠红细胞及肝线粒体游离钙浓度的变化。

Journal of trace elements and electrolytes in health and disease Pub Date : 1992-12-01

A M Loipführer, A M Reichlmayr-Lais, M Kirchgessner

引用次数: 0