- Direct analysis of vitamin A, vitamin E, carotenoids, chlorophylls and free sterols in animal and vegetable fats in a single normal-phase liquid chromatographic run. [Journal Article]
- JCJ Chromatogr A 2018 Jun 12
- The present method was optimized and validated to enable quantification of more than twenty compounds from four chemical classes of important lipid substances, including vitamin E and A derivatives, ...
The present method was optimized and validated to enable quantification of more than twenty compounds from four chemical classes of important lipid substances, including vitamin E and A derivatives, sterols and chlorophylls. After lipid dissolution in the mobile phase, chromatographic separation is accomplished with the newest generation of ultrapure unbounded fully porous silica particles and, finally, target analytes are quantified by diode-array tandem fluorescence detection. A broad working range was achieved for most compounds (r2 > 0.999), with selectivity/specificity confirmed for each analyte by high resolution factors. Limits of detection and quantification were generally as low as a few nanograms per milliliter. The method also showed adequate repeatability and intermediate precision (RSD < 5%) and proved to be very accurate (89-116 %) when applied to the analysis of several vegetable and animal fats. The proposed method is a faster, cost-effective and environmental-friendly alternative for routine analyses in the food quality control field, providing extensive information in one single injection, without sample pre-treatment. Moreover, it preserves the identity of the sample components, thus enabling fingerprints for authenticity purposes.
- Variation in opsin transcript expression explains intraretinal differences in spectral sensitivity of the northern anchovy. [Journal Article]
- VNVis Neurosci 2018; 35:E005
- Vertebrate retinal photoreceptors house visual pigments that absorb light to begin the process of vision. The light absorbed by a visual pigment depends on its two molecular components: protein (opsi...
Vertebrate retinal photoreceptors house visual pigments that absorb light to begin the process of vision. The light absorbed by a visual pigment depends on its two molecular components: protein (opsin) and chromophore (a vitamin A derivative). Although an increasing number of studies show intraretinal variability in visual pigment content, it is only for two mammals (human and mouse) and two birds (chicken and pigeon) that such variability has been demonstrated to underlie differences in spectral sensitivity of the animal. Here, we show that the spectral sensitivity of the northern anchovy varies with retinal quadrant and that this variability can be explained by differences in the expression of opsin transcripts. Retinal (vitamin A1) was the only chromophore detected in the retina, ruling out this molecular component as a source of variation in spectral sensitivity. Chromatic adaptation experiments further showed that the dorsal retina had the capacity to mediate color vision. Together with published results for the ventral retina, this study is the first to demonstrate that intraretinal opsin variability in a fish drives corresponding variation in the animal's spectral sensitivity.
- [Micronutrients intake of pregnant women from 8 cities of China during 2011 to 2012]. [Journal Article]
- WSWei Sheng Yan Jiu 2018; 47(2):242-259
- CONCLUSIONS: Of all the participants, nutritional status of pregnant women in Lanzhou was poorest compare with those in other cities and more attention should be paid on their dietary nutrition. Compared with result of 2002, nutrients intakes of pregnant women were improved in this survey.
- [The anemia and vitamin A, vitamin D nutritional status of Chinese rural pregnant women in 2010-2012]. [Journal Article]
- WSWei Sheng Yan Jiu 2017; 46(3):361-372
- CONCLUSIONS: The prevalence of anemia in Chinese rural pregnant women improve from 2002 to 2012, but still higher than other populations. The prevalence of vitamin D deficiency in pregnant women is generally more serious, while there is a certain percentage of vitamin A marginal deficiency.
- [Serum retinol concentrations of Chinese rural elderly residents in 2010-2012]. [Journal Article]
- WSWei Sheng Yan Jiu 2017; 46(3):356-360
- CONCLUSIONS: Chinese rural elderly population has a certain degree of vitamin A deficiency and marginal deficiency, the marginal deficiency of the elderly over 80 years old is more common.
- [Vitamin A nutritional status of Chinese rural fertile women in 2010-2012]. [Journal Article]
- WSWei Sheng Yan Jiu 2017; 46(3):350-355
- CONCLUSIONS: The different extent of VA deficiency still present and more popular for the VA marginal deficiency among Chinese fertile women.
- [Vitamin A nutritional status of Chinese rural children and adolescents in 2010-2012]. [Journal Article]
- WSWei Sheng Yan Jiu 2017; 46(3):345-349
- CONCLUSIONS: The situation of vitamin A deficiency in rural China are still widespread, the high prevalence of marginal vitamin A deficiency is more prominent.
- [Contribution of snacks to energy and nutrients among Chinese snackers above 6 years old in 2010-2012]. [Journal Article]
- WSWei Sheng Yan Jiu 2017; 46(4):546-549
- CONCLUSIONS: Snacks provide more carbohydrate and fat than protein among Chinese snackers.
- Bariatric Surgery Does Not Appear to Affect Women's Breast-Milk Composition. [Journal Article]
- JNJ Nutr 2018 Jun 13
- CONCLUSIONS: Breast milk of women who have undergone BS appears to be adequate in energy, macronutrients, and vitamin A during the first 6 wk of lactation. This supports the conclusion that breast feeding should not be discouraged in this group of women. This trial was registered at http://www.clinicaltrials.gov as NCT02515214.
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- SUSPECTED HYPOVITAMINOSIS A-ASSOCIATED SALT GLAND ADENITIS IN NORTHERN ROCKHOPPER PENGUINS ( EUDYPTES MOSELEYI). [Journal Article]
- JZJ Zoo Wildl Med 2018; 49(2):420-428
- Supraorbital salt-excreting glands are present in at least 10 avian orders and are largest in marine species, including penguins. Diseases of the avian salt gland have been described infrequently. ...
Supraorbital salt-excreting glands are present in at least 10 avian orders and are largest in marine species, including penguins. Diseases of the avian salt gland have been described infrequently. From September 2015, five captive northern rockhopper penguins ( Eudyptes moseleyi) were presented over a 6-wk period for unilateral or bilateral supraorbital swellings. In September 2016, two cases recurred and two additional cases were identified. Histopathology demonstrated salt gland adenitis with extensive squamous metaplasia. Blood plasma testing demonstrated marked vitamin A and E deficiencies within the colony. Prolonged frozen storage of feed-fish was implicated as a cause of vitamin depletion; reducing storage times and addition of dietary supplementation prevented recurrence.