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The aim of this study was to compare growth curves of stature in indigenous and non-indigenous children belonging to two levels of poverty and to establish the onset and evolution of the deficit. Children of indigenous and non-indigenous background living in communities of extreme and low poverty in Chile were studied and their height-for-age Z-score from birth until 6 year of age were compared. Mean weight at birth was within normal range, and no differences were found in ethnicity and levels of poverty. Length at birth was below the reference with the exception of the non indigenous newborn from counties of low poverty. Deficit in growth showed an early start, furthermore in indigenous children belonging to the extreme poverty, is from birth and progress through the 18 months. At 72 months the deficit reached -1.1 z scores in the indigenous of the extreme poverty versus -0.7 in the non indigenous group. Children from the low poverty had a Z-score of -0.4 z scores at 72 months without differences between ethnias. Indigenous of the extreme poverty had less accumulative growth while the indigenous of the low poverty areas growth satisfactory without differences with the non indigenous. 相似文献
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Gamboa Delgado EM López Barbosa N Prada Gómez GE Franco Cadena JT Landínez Navarro A 《Archivos latinoamericanos de nutrición》2010,60(3):247-253
The objective of this study was to determine associated factors to the consumption of fruit and vegetables (FV) in the adult population of each socioeconomic status (SES) in Bucaramanga, Colombia. We conducted a cross-sectional in a sample of 317 people and we measured socio-demographic, economic and anthropometric variables and dietary factors related to the purchase and consumption of FV. We made a survey, a 24-Hour dietary recall and we did anthropometric measurements. Portion sizes were estimated with a standardized set of utensils and food-photography atlas. Frequencies, measures of central tendency and dispersion were established and Logistic Regression models were used for the bi and multivariate analysis. Average consumption of FV was 162.6 g/day (188.5 g in high SES and 145.7 g in low SES, p = 0.056). On average 2 servings per day of FV (2.3 servings in high SES and 1.5 in low SES, p = 0.055). The prevalence of adequate intake of FV (more than 5 servings / day) was 8.6% (8.9% in high SES and 8.4% in low SES, p = 0.896). The associated factor to consumption of FV was BMI > or =25 (OR: 0.31, CI (95%): 0.11-0.89, p = 0.030), adjusted for occupation, income, SES, and number of family members. FV consumption is low; excess weight is the only variable associated to no-consumption of five or more servings; causes: cost to the consumption of fruit and flavor in the case of vegetables. 相似文献
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采用气相色谱质谱联用法(GC-MS)对3种低密度聚乙烯薄膜中的芥酸酰胺进行检测,研究了芥酸酰胺向食品模拟物的迁移。用毒理学关注阈值(TTC)法对芥酸酰胺的风险性进行评估。结果表明,芥酸酰胺在质量浓度为100~5 000 μg/L的范围内线性良好,相关系数(R)为0.993,加标回收率为78.3 %~115.6 %,相对标准偏差为2.9 %~11.6 %,芥酸酰胺的检出限为30 μg/L;在一定范围内,随着时间、温度及芥酸酰胺添加浓度的增加,芥酸酰胺的迁移量不断增加;芥酸酰胺在低密度聚乙烯和食品模拟物之间的分配系数随着芥酸酰胺的添加浓度增加而有所增加,但变化不大。 相似文献
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Allelochemicals in Chicory and Utilization in Processed Foods 总被引:4,自引:0,他引:4
Hiroyuki Nishimura Yasuo Kondo Toshio Nagasaka Atsushi Satoh 《Journal of chemical ecology》2000,26(9):2233-2241
In connection with a proposed defensive mechanism of chicory, antimicrobial, and nematicidal substances from the rhizomes were studied. A new antimicrobial sesquiterpenoid, 8-angeloyloxycichoralexin, in addition to guaianolides such as cichoralexin and 10-hydroxycichopumilide, was isolated and identified. These sesquiterpenoids exhibited antifungal activities against Pericularia oryzae, Pellicularia sasakii, Alternaria kikuchiana, and others. Ether-soluble phenolics from the chicory rhizome exhibited nematicidal activity. Thus, it appears that these secondary metabolites play an important ecological role. Furthermore, the allelochemical research was applied to the production of processed foods. The addition of dry powder from chicory rhizome to noodles, a boiled fish paste, and cocoaand coffeecakes provided elongation of food preservation. 相似文献
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Aflatoxins are secondary metabolites produced by certain species of Aspergillus, i.e., A. flavus, A. parasiticus, and the rare A. nomius, during their growth under favorable conditions of temperature and humidity. Aflatoxins are highly toxic compounds, which can cause acute and chronic toxicity in humans and animals. The incidence of aflatoxins in foods and feeds is relatively high in tropical and subtropical regions, where the warm and humid weather provides optimal condition for the growth of molds. As aflatoxins are very heat stable and cannot be easily eliminated by domestic cooking, rapid drying of agricultural products to reduce their moisture content is important, as this can avoid the favorable conditions for the growth of fungi. This article reviews general information on aflatoxins, products prone to be contaminated with aflatoxins, and the use of different drying techniques to control mold growth and aflatoxins production, as well as to reduce the contamination level of aflatoxins in food products. 相似文献
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One-year simple NPK trials were conducted in 22 locations in four regions of Colombia to determine the response of cassava (Manihot esculenta Crantz) to N, P and K and to relate this response to the available P and K contents of the soil, as well as to the N, P, and K concentrations in youngest fully expanded leaf (YFEL) blades sampled at 3–5 months after planting. It was found that cassava responded mainly to P applications in the low-P soils of the Eastern Plains and of Cauca Department, to K applications only in the Eastern Plains and to N applications principally in the sandy, low-OM soils of the Atlantic Coast. By relating the relative response to P and K to the available P and exchangeable K content of the soil, respectively, critical levels of 4 mg P/kg and 0.17 me K/100 g (both extracted with Bray II) were determined. Similarly, critical levels of 5.6% N, 0.41% P and 1.42% K were determined in YFEL-blades.A long-term fertilizer trial with 35 treatments was conducted for 8 consecutive years in the highly acid low-fertility soil at CIAT-Quilichao, to determine the effect of cassava production and fertilization on soil fertility. Although the first year response was mainly to P and N, already in the second year K became the most limiting nutrient and the importance of K fertilization increased over the years. This trial, and similar long-term fertility trials conducted in Colombia and in various parts of Asia, have all shown the importance of adequate annual applications of K for maintaining high yields of continuously grown cassava. 相似文献
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We performed field tests of alkaloid induction inNicotiana attenuata plants growing in southwestern Utah with mimicry of the two major types of damage inflicted by invertebrate and vertebrate herbivores: leaf damage and stalk removal, respectively. In undamaged plants, seasonal increases in leaf nicotine content occurred at a rate of 0.046% leaf dry mass/day. Leaf damage doubled the accumulation rate to 0.086–0.138% leaf dry mass/day, while stalk removal resulted in a quadrupling of the accumulation rate to 0.206% leaf dry mass/day. These damage-induced increases in nicotine accumulation are significantly larger than between-plant and phenological variations. Leaf damage to the nornicotine-(N. repanda andN. trigonophylla) and anabasine-accumulating (N. glauca)Nicotiana species native to North America resulted in 1.5- to 5-fold increases in their principal leaf alkaloid pools. We conclude that alkaloid induction is not limited to nicotine-accumulatingNicotiana species and that herbivores feeding on previously damaged plants are likely to encounter tissues with alkaloid titers significantly higher than those of undamaged plants. 相似文献
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《Filtration+Separation》2003,40(9):9
In Canada, H2O Innovation (2000) Inc has signed a contract worth C$360?000 (US$274?000) with the Manitoba Department of Aboriginal and Northern Affairs.Visit www.filtsep.com for the latest filtration industry news 相似文献
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Levels of polycyclic aromatic hydrocarbons (PAHs) in commercially available baby food and in different sorts of fruits were investigated. PAHs determination was performed by gas chromatography coupled with mass spectrometry (GC/MS). The sum of 15 PAHs varied in baby food from 2.52–6.7 μg/kg and in fruits from 0.40–21.52 μg/kg. Benzo[a]pyrene used as a marker for PAHs contamination was detected in lower levels in baby food than the maximum tolerable limit (1 μg/kg) stated in Commission Regulation no 1881/2006. 相似文献
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Microwave-assisted freeze drying (MFD) can be accomplished in two distinct ways: freeze drying assisted concurrently with microwave application (MFD-1) and freeze drying and assisted microwave/vacuum microwave drying in two consecutive separate drying stages (MFD-2). MFD is a rapid dehydration technique that can be applied to certain foods, particularly to seafoods, solid soup, and fruits and vegetables. MFD involves much less drying time and energy consumption than conventional freeze-drying methods. Currently, this technology has been successfully used to dry many food materials and has potential in the food industry. Increasing concerns over product quality, energy savings, and production costs have motivated researchers and the industry to adopt MFD technologies. The advantages of MFD include shorter drying time, energy savings, improved product quality, and flexibility in producing a wide variety of dried products. However, current applications are limited to small categories of foods due to high startup costs and relatively complex technology compared to conventional freeze drying. This article presents a concise review of recent progress in MFD R&D and makes recommendations for future research to bridge the gap between laboratory research and industrial applications. 相似文献