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1.
The aims of this study were to determine the effect of breast milk zinc, copper, and iron concentrations on infants’ growth and their possible correlations with maternal dietary intake. Milk samples and information on food intake were collected from 182 lactating women. Concentrations of zinc, copper, and iron in milk were analyzed using atomic absorption spectrophotometry. The infant’s weight for age Z-score (WAZ) and height for age Z-score (HAZ) were calculated. The mean milk zinc, copper, and iron concentrations were 1.85?±?0.5, 0.53?±?0.3, and 0.85?±?0.2 mg/l, respectively. Only zinc mean level was lower than the recommended range. Association between zinc, copper, and iron concentrations of milk and WAZ or HAZ of infants were not significant. However, the WAZ of infants whose mothers' milk zinc was more than 2 mg/l was significantly (P?<?0.039) higher than for others. The mean dietary zinc (5.31?±?2.3 mg/day) and copper (1.16?±?0.7 mg/day) intake of mothers was significantly less than the required daily intake (RDA) recommendations (P?<?0.05). The mean dietary iron intake (11.8?±?8.2 mg/day) was significantly higher than RDA recommendation (P?<?0.001). No significant association was found between maternal mean dietary zinc, copper, and iron intakes with their concentrations in milk. Dietary consultation or/and zinc supplementation is suggested for lactating women and infants.  相似文献   

2.
Daily energy, protein, calcium (Ca), phosphorus (P), zinc (Zn), copper (Cu), manganese (Mn), and dietary fiber intakes of East Indian Punjabi immigrants consuming predominantly lacto-ovo vegetarian diets [59 males (M), mean age 37.7±10.5 yr. and 53 females (F), mean age 33.3±7.4 yr] were assessed by calculation from 3-d weighted dietary records, using food composition values and by chemical analysis of 30 1-d diet composites. Mean daily calculated intakes wer: energy, M=2374±713 and F=1708±552 kcal; protein, M=95.8±35.1 and F=68.0±28.9g; Ca, M=990±468 and F=837±393 mg; M=2034±778 and F=1489±551 mg; Zn, M=12.2±4.9 and F=8.8±3.9 mg; Cu, M=2.4±0.9 and F=1.7±0.6 mg; and Mn, M=7.7±3.3 and F=5.7±2.4 mg. The mean daily Ca intakes for M and F were 124 and 105%, respectively, of the Canadian Recommended Nutrient Intake (RNI). In contrast, average P intakes were much higher, 254 and 213% of the RNI for M and F, respectively, so that the mean Ca:P ratios were 1:2.0 for M and 1:1.8 for F. Forty-eight percent of the F compared to 19% of the M had Zn intakes below the current RNI, whereas 28% of the M and 77% of the F received Cu intakes below the suggested US safe and adequate range. Mean daily Mn intakes were higher than those for subjects consuming omniverous North American diets and none of the subjects had Mn intakes below the US safe and adequate range.  相似文献   

3.
In order to evaluate serum copper and zinc status in children with iron deficiency anemia (IDA), 60 children with IDA aged 1–14 yr and 64 healthy children as controls aged 1–14 yr were included the study. Serum copper levels were higher in children with IDA (189 ± 49 (Μg/dL) than those of controls (163 ± 37 Μg/dL) (p = 0.001). Serum zinc levels were lower in the patient group (109 ± 59 Μg/dL) than those of control subjects (135 ± 56 Μg/dL) (p = 0.017). In addition, there were statistically significant negative correlations between hematological parameters and serum copper levels in the patient group, but not in controls. No correlation between hematological parameters and serum zinc levels were found in both patient and control groups, except positive correlation between mean corpuscular volume (MCV) and serum zinc level in patients. It was concluded that at the time of managing children with IDA, zinc deficiency must be borne in mind and if necessary treatment should be initiated with zinc.  相似文献   

4.
The present study focused on whether serum extracellular superoxide dimutase (EC-SOD) activity can be used as a functional indicator of marginal zinc deficiency in humans. Subjects in this study were 444 healthy adults over 30 yr of age living a normal rural life in Kyunggi province, Korea. The mean dietary zinc intake of subjects obtained from one 24-h recall was 6.41 ± 4.35 mg and the average serum zinc concentration of the subjects was 11.06 ± 2.44 (μmol/L. Subjects were divided into three groups by serum zinc concentrations: adequate (serum zinc >10.7 (μmol/L), low (serum zinc 9.0–10.7 μmol/L), and very low (serum zinc <9.0 μmol/L) groups. A total of 50 subjects were selected from the three groups for analysis of EC-SOD activities. The EC-SOD activity of subjects increased with increasing serum zinc concentrations, and the activities of the three groups were significantly different as indicated by the Kruskal-Wallis test (p = 0.0239). Also, serum EC-SOD activities were significantly correlated with serum zinc concentrations (r = 0.289,p = 0.04). Serum EC-SOD activities, however, were not significantly correlated to the dietary zinc intakes. In conclusion, these results show that EC-SOD activities are decreased in subjects with low serum zinc concentrations and suggest that EC-SOD activity may be a functional indicator of zinc nutritional status in humans.  相似文献   

5.
It has been suggested that mood disorders and depressive status may be accompanied by lowered zinc status in the body, and adequate consumption of zinc increases a general perceived well-being. The main objective of this study was to assess the correlation between serum zinc concentrations and dietary zinc intakes with depression scores in university female students. In the first phase, Beck's depression questionnaire was applied in a random sampling of 308 selected 20–25-year-old female students (one third of total students in Ahvaz Jondi-Shapour University of Medical Sciences Golestan dormitories) to assess the major depressive disorder (MDD) scales. Then, in the second phase, 23 students who identified as having moderate and severe depression were selected as the case group, and 23 healthy age matched were chosen as the controls. Each of them completed a 12-item semiquantitative food frequency questionnaire containing the main food sources of zinc in the usual dietary patterns and also a 24-h food recall questionnaire to assure the daily zinc intakes. Daily zinc intakes were obtained by multiplying each portion size by its zinc content using food tables. A 5-ml blood sample was taken for further serum zinc status using flame atomic absorption spectrophotometry technique. Pearson's r was used to show the correlation between quantitative variables. Both daily zinc intake and serum zinc concentrations of MDD group were about two thirds of healthy index (p < 0.01). Depressed individuals used to eat lower servings of red meats and chicken as the main food sources of zinc in students' usual diets (p < 0.001). Consumption of other foods as the sources of zinc was not significantly different in two groups. A linear significant correlation between dietary zinc intakes and its serum levels was seen in samples (r = 0.62; p < 0.001) and MDD students (r = 0.55; p < 0.001). There was a linear inverse correlation between Beck questionnaire scores and serum zinc concentrations in all of the investigated students(r = -0.65; p < 0.001) and MDD girls (r = −0.71; p < 0.001). Beck questionnaire scores and diatary zinc intakes were also inversly correlated (r = −0.58; p < 0.001). However, no statistical correlation was seen between these two variables in MDD cases. In depressed female students, dietary zinc intake is correlated to its serum concentrations; however, the serum zinc levels are inversely correlated to depression scales. Consumption of the main dietary sources of zinc such as red meats and chicken should be encouraged in young depressed girls.  相似文献   

6.
The zinc nutritional status in south Koreans was established by evaluation of zinc, calcium and phytate intakes, the molar ratio of phytate: zinc, and the millimolar ratio of phytate × calcium: zinc. The intakes of iron and magnesium were also estimated. Sampling was designed so that it was representative of the national population. Two-day food records were used for the calculation of nutrient intakes, using food consumption data from the 1995 National Nutrition Survey (’95NNS) for South Korea. Daily intakes of zinc and calcium were estimated to be 10.1 mg/d and 426.5 mg/d, respectively, and those of iron and magnesium were 15.2 mg/d and 268.0 mg/d, respectively. The estimated daily phytate intake was 1676.6 mg/d. The ratio of phytate: zinc was 15.9 mol/d and that of phytate × calcium: zinc was 168.9 mmol/d. The ratio in millimoles per 4.2 MJ (1000 kcal) of phytate × calcium: zinc was 91.8. The major food groups for zinc intake were meat, poultry and their products (43%), and cereals and grain products (18%). Sixty-two percent of zinc was from animal food sources. Cereal and grain products supplied most of the phytate intake (46%) followed by seasonings, fruits, and legumes and their products. The major food source of phytate was rice (39%). The results of the study raise concern about the suboptimal zinc status in relation to the Western diet.  相似文献   

7.
Plasma zinc, copper, and parameters of growth were measured in a group of 116 French preschool children, 2–5 yr-old from low-income households. Participants were selected on the basis of Z-scores of weight for height (WHZ) and height for age (HAZ). Zinc and copper concentrations of children with growth impairment (GI), defined by a WHZ and/or HAZ< −1 Z-score, were compared to those of age, sex, and ethnic origin matched controls (WHZ and HAZ >−1 Z-score). Mean (±SD) plasma zinc concentration was 12.58±1.84 μmol/L in the GI group, and 13.27±1.98 μmol/L in the controls. The difference of the means of paired samples was 0.69±2.34, and by pairedt-test the significance reachedp=0.028. This effect was primarily a result of the weight retarded group (WHZ <−1 Z-score,p<0.009) and to the girls (p<0.05). There were no significant differences in plasma copper concentrations between groups. These results suggest the presence of marginal zinc deficiency in French preschool children with low weight for height Z-scores.  相似文献   

8.
This study aimed to analyze the amounts of copper, selenium, and molybdenum among trace minerals in foods and to evaluate their daily intakes in Korean adults. Contents of copper, selenium, and molybdenum in 366 varieties of foods commonly consumed by Koreans were analyzed using inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry, techniques with low detection limits as well as high reproducibility and precision. Next, we evaluated the status of trace mineral intake using the 24-h recall method after conducting anthropometric measurements on 249 male and 344 female adults aged 20 or older. The average daily energy intake for males was 7,452.8 kJ, significantly higher than the 6,118.3 kJ for females (p < 0.001). The average daily copper, selenium, and molybdenum intakes by males were 1,156.7, 135.5, and 12.2 μg, respectively, compared to 1,028.5, 122.9, and 10.1 μg, respectively, by females. In males, the intake levels of copper and molybdenum were both significantly higher than in females. By continuously evaluating intake levels in this manner, it is anticipated that reference intakes of trace minerals will be established.  相似文献   

9.
10.
The aim of this study was to determine whether the postprandial decline in plasma zinc concentration is altered by aging. Eleven women, between the ages of 65 and 82 yr, participated in two separate experimental protocols: a high carbohydrate breakfast trial and a fasting trial. Plasma zinc concentrations were measured from blood samples obtained at 8∶00am (baseline fasting) and at 30-min intervals until 1∶00pm during each trial. Following the breakfast meal, plasma zinc concentrations declined 14% from 75±1 to 65±2 μg/dL (p<0.05), reaching a nadir 2.7±0.2 h after the meal. This decline was significantly (p<0.0001) greater than the 3.6% fall observed during the fasting trial. Postprandial changes in the plasma zinc concentrations were correlated with postprandial changes in serum glucose (r=−0.43,p<0.001), serum insulin (r=−0.17,p<0.01), and serum phosphorus(r=0.32,p<0.005). These data show that plasma zinc concentrations decline following food intake in elderly women in the same manner as previously described for younger adult women.  相似文献   

11.
Three models were used to determine the daily dietary Selenium intake in Slovakia. The Selenium content of food produced and consumed in the Slovak Republic was used to estimate and calculate the daily Selenium intake based on food consumption data per capita and seven days, (24 h) eating protocol models. In a duplicate portion model, Selenium was analyzed in a whole day hospital diet during an eight-day period. According to these models the daily dietary Selenium intake was 38.2 μg; 43.3 ±6.5 μg for men and 32.6 ±6.6 μg for women; 27.1 ±7.8 μg for normal and 32.3 ±4.8 μg for nourishing hospital diets. The main contributors of Selenium to daily intake were the following: eggs, pork, and poultry. The obtained results indicate that the daily dietary intake of Selenium of the Slovak people is below the recommended values.  相似文献   

12.
Twenty-three hypertensive outpatients aged 18–53 yr (average: 39.8±10.4 yr) were classified into two groups according to body mass index (BMI). Six patients exceeded the BMI limit, set at 30 kg/m2. All were treated with 100 mg/d spironolactone and were subject to before and after measurements of their arterial pressure, efflux rate constants of zinc from lymphocytes (total ERCt-Zn and ouabain-dependent ERCos-Zn), serum zinc (Zn-s), lymphocyte zinc (Zn-l), serum aldosterone (Ald-s), plasma renin activity (PRA), serum sodium (Na-s), and potassium (K-s). After 7 d of spironolactone treatment, the ERCt-Zn change in normal-weight patients was +0.78±0.57, and −0.22±0.69 in obese patients. In the same manner, the change of ERCos-Zn was +0.59±0.94 and −0.025±0.32 in normal and obese patients, respectively. Serum Zn was increased in normal-weight patients but remained unchanged in the obese. The initial lymphocyte zinc values were significantly lower in obese patients, but increased up to normal values after spironolactone treatment.  相似文献   

13.
Dietary factors affecting zinc bioavailability were evaluated according to their relative distribution in the individual daily meals making up the basic diet of 17 institutionalized, mentally handicapped adult women. Mean intake values of zinc, phytate, nonstarch polysaccharides (NSP), calcium, protein, and energy were calculated from a dietary survey of 7 consecutive days, which also served to obtain values for the two zinc bioavailability predictor formulas, phytate/Zn millimolar ratio and [Ca] [phytate]/[Zn][energy] ratio. Mean daily zinc intake was 8.5 ±1.8 mg, with noon and evening meals accounting for the highest contribution to this value (45% and 35%, respectively), whereas breakfast meals’ contribution was 16%. The mean protein intake was 55 ±13 g, with noon and evening meals being the major contributors to total daily intake (42% and 38%, respectively). Breakfast meals accounted for 77% of daily phytate intake, giving a respective phytate/Zn millimolar ratio of 20.4 ±7.6 and a [Ca][phytate]/[Zn][energy] ratio of 336 ±127 mmol/Mcal. Values for both ratios based on noon and evening meals were negligible in comparison. The mean daily NSP intake was 9.8 ±4.2 g, with 53% of total daily intake supplied from breakfast meals, whereas noon and evening meals accounted for 30% and 14%, respectively. The results, while suggesting that zinc bioavailability is unlikely to be adversely affected, indicated that dietary fiber intake levels are probably inadequate, particularly in view of the nonambulant condition and low physical activity prevalent in such individuals, who may, as a consequence, be susceptible to health disorders associated with impaired bowel function and constipation.  相似文献   

14.
Premature graying of hair with unclear etiology, which is known as premature canities, is a common cause of referrals to the dermatologists. We assessed the relationship between serum iron, copper, and zinc concentrations with premature canities. This study was conducted on patients under 20 years old suffering from premature canities, having a minimum of ten gray hair fibers, and referring to university hospitals of Isfahan (Iran). The results were compared with age–sex-matched controls. Demographic data and disease characteristics were recorded for two groups. We studied serum iron, copper, and zinc concentrations of 66 patients and 66 controls using atomic absorption and Ferrozine methods. The mean age of studied cases was 17.8 ± 2.0 years, and the mean age of the onset of canities was 15.5 ± 3.2 years with no significant difference between males and females (P > 0.05). Serum copper concentration was significantly lower in patients compared with controls (90.7 ± 37.4 vs. 105.3 ± 50.2 μg/dL, P = 0.048), but serum iron concentration was significantly lower in controls compared to patients (88.8 ± 39.5 vs. 108.3 ± 48.4 μg/dL, P = 0.008). Also, there was no significant difference between patients and controls in serum zinc concentration (114.8 ± 67.8 vs. 108.2 ± 49.9 μg/dL, P = 0.285). According to these results, among copper, zinc, and iron, a low serum copper concentration may play a role in premature graying of hairs in our society. Further studies are needed to find the underlying mechanism of this relationship.  相似文献   

15.
The serum concentrations of copper, zinc, iron, and cobalt and copper/zinc ratio were investigated in horses infected with equine herpesvirus-1 (EHV-1). Nine horses were naturally infected with the virus and nine healthy horses served as controls. The concentrations of copper, zinc, iron, and cobalt were determined spectrophotometrically in the blood serum of all horses. The results were (expressed in micrograms per deciliters) copper 2.80 ± 0.34 vs 1.12 ± 0.44, zinc 3.05 ± 0.18 vs 0.83 ± 0.06, iron 2.76 ± 0.17 vs 3.71 ± 0.69, cobalt 0.19 ± 0.37 vs 0.22 ± 0.45, and copper/zinc ratio 0.72 ± 0.38 vs 1.41 ± 0.36 for control vs infected group, respectively. In conclusion, copper and zinc concentrations of the infected group were lower than the control group (p < 0.001), whereas iron concentration and the copper/zinc ratio of the infected group were higher than the control group (p < 0.05 and p < 0.001). The cobalt concentration was not found to be statistically different between two groups. It might be emphasized that copper/zinc ratio was significantly affected by the EHV-1 infection, so it could be taken into consideration during the course of infection. An erratum to this article can be found at  相似文献   

16.
A method is described, based on the simultaneous turnover of both stable (18O) and radioactive isotopes (3H and 22Na), whereby the daily nectar and pollen intake of free-ranging marsupial honey possums (Tarsipes rostratus) may be estimated. The field metabolic rate is measured using doubly labelled water and nectar intake is estimated independently from the measured water and sodium fluxes. The method assumes that free-water intake is negligible (but may be accounted for if not the case), that virtually all dietary sodium is derived from nectar rather than from pollen, and that the animals are in energetic balance over the period of measurement. These assumptions have been tested and found to be robust, except during periods of heavy rain when significant intakes of free-water were recorded. Leaching experiments with pollen grains suggest that less than 10% of the sodium ingested by honey possums is derived from pollen and calculations thus assumed a 90%:10% split between nectar and pollen. Nectar intake averaged 5.9 ± 0.6 ml · day−1 and regressing nectar intake on daily change in body mass predicts an intake of approximately 7 ml · day−1 nectar to maintain balance for a 9 g honey possum. Estimates of pollen intake averaged 660 ± 156 mg · day−1 and a similar regression analysis of the data predicts that a daily intake of approximately 1 g pollen would be needed to maintain mass balance of honey possums. Estimated nectar and pollen intakes did not differ significantly between males and females, but nectar intake was higher in winter compared with dry periods of the year. The sugar content of nectar falls during winter, however, and the overall energy derived from nectar thus remains roughly constant. Estimates of pollen and nectar intake for individual animals were not significantly correlated, suggesting that honey possums forage selectively for these two food items. Accepted: 19 August 1999  相似文献   

17.
To investigate the Zn status of inhabitants of the Czech Republic, 1155 serum and 132 hair samples were analyzed for zinc content. Analyzed material was obtained from randomly selected volunteers of both sexes in the age range 6–65 yr. Subpopulations from five regions were included in the study. Analyses of both materials were performed by Instrumental Neutron Activation Analysis (INAA). Coanalyses of Standard Reference Materials (SRM) for quality control were performed. The results (mean 910 ±276 Μg Zn/L serum and 189 ±45 Μg Zn/g hair) demonstrate satisfactory zinc status of the searched population. Significant interregional differences and age-dependent differences, as well as sex-dependent differences have been detected by the use of correlation analysis. On the basis of these results, serum Zn concentration results of individual categories according to age and sex were evaluated, and on the grounds of mean ±2 standard deviations, indicative intervals were calculated. The frequency of individual serum Zn concentrations proved that the population of the Czech Republic does not suffer from severe zinc deficiency. On the other hand, about one-third of our inhabitants has their serum Zn concentrations below the cutoff value of 800 Μg Zn/L serum, which means a marginal or mild Zn deficit of the organism.  相似文献   

18.
It has been postulated that increased blood pressure is related to hypersensitivity of arterial chemoreceptors and increased tissue oxygen supply. Arterial blood pressure has been found to be negatively correlated to serum zinc and positively correlated to age, body mass index, and hemoglobin concentrations. The aim of the present investigation was to further explore the relationship between blood pressure and zinc concentrations in serum and blood morphology parameters, iron concentrations, and venous blood gasometry parameters. The study was carried out in two groups. Group Aconsisted of 23 subjects of both sexes suffering from moderate to severe arterial blood pressure. Their mean age was 53.13±10.45 yr (range: 23–74 yr). Group B included 48 subjects of mean age 36.7±10.0 yr (range: 26–60 yr). This group included 5 patients with arterial hypotension, 37 with hypertension, and the remaining 6 with normal blood pressure. Significant positive correlations between serum zinc and red blood cell count (r = 0.51) and negative with age (r = −0.52) were found. By multiple regression, negative correlations were also found between serum zinc and the diastolic blood pressure and with hemoglobin (r = −0.5). Age was positively correlated to systolic (r = 0.49) and diastolic (r = 0.45) blood pressure parameters and to hemoglobin concentrations (r = 0.33 and r = 0.38, respectively). Buffered and excess bases in blood were negatively correlated to zinc (r = −0.29 in both cases) and to systolic and diastolic blood pressure (r = −0.31 and r = −0.40, respectively). In turn, the systolic and diastolic blood pressure also correlated negatively to the partial pressure of carbon dioxide and positively to venous blood oxygen saturation and to the partial pressure of oxygen. The role of zinc and acid-balance realtionships in blood pressure regulation and in arterial hypertension ethiopatogenesis is disscused.  相似文献   

19.
Recently, a study reported that magnesium played a part in the attack of chronic diseases, such as arteriosclerosis, diabetes, metabolic syndrome, and hypertension. However, there are not even enough studies to evaluate magnesium intakes. Therefore, in this study, we evaluated the magnesium intakes of 500 healthy adults. In addition, by selecting 50 targets, we examined the correlation between magnesium intake and antioxidant capacity biomarkers. In the age group of 19–29, the daily magnesium intake was 276.3 mg for males and 232.1 mg for females. In the age group of 30–49, it was 305.1 mg and 246.5 mg, respectively. In the age group of 50–64, the magnesium intake was 294.4 mg for males and 245.7 mg for females. As for the age group of 19–29, the magnesium intake per 4,187 kJ of energy intake was 129.8 mg, which was significantly lower than the 164.6 mg by the age group of 30–49 and 172.4 mg by the age group of 50–64. The ratio of magnesium intake to the recommended intake was 82.1% for those in the age group of 19–29, 87.7% for those in 30–49, and 86.1% for those in 50–64. The rate of the subjects with magnesium intakes lower than the estimated average requirement was 55.3% in the age group of 19–29, 52.4% in 30–49, and 54.2% in 50–64. The magnesium intake from food groups were in the descending order of vegetables, cereals, and fish for the subjects in the age group of 19–29, and vegetables, cereals, and beverages for the subjects in the age groups of 30–49 and 50–64. The source food items of magnesium intake were in the descending order of Kimchi, tofu, rice, and coffee in the age group of 19–29, coffee, Kimchi, tofu, and rice in 30–49, and coffee, Kimchi, rice, and tofu in 50–64. From the 50 targets aged 19–29, significant correlation was not indicated among magnesium intake, serum magnesium, and antioxidant capacity biomarkers. In conclusion, the magnesium intake status of some Korean adults is unsatisfactory. And it is suggested that this low intake of magnesium has no correlation with antioxidant capacity.  相似文献   

20.
The effectiveness and success of antitubercular therapy is mainly measured by identifying the organism in sputum. In certain patients, especially in geriatric patients, available tuberculosis tests are not satisfactory and do not provide enough information on the effectiveness of antitubercular therapy, as the symptoms might be confused with the existing symptoms of ongoing diseases. Therefore, 60 diagnosed and randomly selected patients with tuberculosis were included into this study. The patients with other associated diseases likely to influence serum copper and zinc were not included in the study. The estimations of serum copper and zinc were done in healthy volunteers and in tubercular patients before the start of treatment and after 4 wk of antitubercular treatment. The average plasma concentration of serum copper and zinc in healthy volunteers were 102±20 μg/dL and 96±18 μg/dL respectively. In tuberculosis patients, serum copper and zinc levels were 123.65±9.98 μg/dL and 64.14±3.97 μg/dL, respectively, before the start of treatment, which came down to 116.23±4.27 μg/dL and 74.31±3.60 μg/dL, respectively, after 4 wk of antitubercular treatment.  相似文献   

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