Simultaneous quantitative determination, identification and qualitative screening of pesticides in fruits and vegetables using LC-Q-Orbitrap™-MS

2015 ◽  
Vol 32 (10) ◽  
pp. 1628-1636 ◽  
Author(s):  
Paul Zomer ◽  
Hans G.J. Mol
Keyword(s):  
Quantitative Determination ◽  
Fruits And Vegetables

scholarly journals Determination of vitamin A content from selected Nigerian fruits using spectrophotometric method

2017 ◽  
Vol 52 (2) ◽  
pp. 153-158 ◽  
Author(s):  
SO Aremu ◽  
CC Nweze
Keyword(s):  
Vitamin A ◽  
Quantitative Determination ◽  
Spectrophotometric Method ◽  
Fruits And Vegetables ◽  
Significant Difference ◽  
Conversion Formula ◽  
Major Nutrients

The vitamin A content of the fresh fruits was determined by the extraction and quantitative determination of the pro-vitamin A carotenoid-?-carotene. The Retinol Equivalent (RE) was then obtained using standard conversion formula. The result indicated that the fruit with the minimum vitamin A content and percentage among the six samples was found in mango 301.61 ± 1.03 (7%), which was followed closely by watermelon 350.12 ± 19.01 (8%), guava 504.1 ± 0.75 (11%), tomato 542.86 ± 20.20 (12%), pawpaw 683.93 ± 5.15 (16%) and the highest content was found in carrot 2054.10 ± 1.28 (46%) in (RE/100 g). Statistical calculations and analysis showed that there was significant difference in vitamin A content among the fruits (p<0.05). Thus, besides major nutrients fruits and vegetables contribute very good amount of micro nutrient-vitamin A from ?-carotene.Bangladesh J. Sci. Ind. Res. 52(2), 153-158, 2017

Phosdrin Residues in Fruits and Vegetables

1964 ◽  
Vol 47 (2) ◽  
pp. 272-280
Author(s):  
N Bluman
Keyword(s):  
Acetic Acid ◽  
Quantitative Determination ◽  
Enzyme Inhibition ◽  
Fruits And Vegetables ◽  
Acetylcholinesterase Inhibition ◽  
Spectrophotometric Procedure ◽  
Ferric Salt ◽  
Organic Impurities ◽  
The Mean

Abstract The enzyme inhibition-spectrophotometric procedure for Phosdrin residues submitted by the manufacturer has been slightly modified and studied collaboratively on apples, tomatoes, and cabbages. This method is based on the ability of Phosdrin to inhibit cholinesterase. Phosdrin is extracted from crops with chloroform, transferred into water, purified to remove organic impurities, and determined quantitatively by the acetylcholinesterase inhibition procedure. The uninhibited cholinesterase hydrolyzes acetylcholine to acetic acid and choline. The acetylcholine not hydrolyzed is reacted with alkaline hydroxylamine and a ferric salt to form a red complex, the absorbance of which is measured spectrophotometrically at 540 mμ. The recoveries at the 0.164 and 0.328 ppm levels of addition ranged from 73.2 to 109.8% for apples, 70.1 to 111.0% for tomatoes, and 68.9 to 117.0% for cabbages. The mean recoveries for apples, tomatoes, arid cabbages were 95.9, 94.9, and 91.6%, respectively; the over-all recovery was 94.1%. The method is recommended as official, first action for quantitative determination of Phosdrin residues in fruits and vegetables.

Flavonoids in adipose tissue inflammation and atherosclerosis: one arrow, two targets

2020 ◽  
Vol 134 (12) ◽  
pp. 1403-1432 ◽  
Author(s):  
Manal Muin Fardoun ◽  
Dina Maaliki ◽  
Nabil Halabi ◽  
Rabah Iratni ◽  
Alessandra Bitto ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Fruits And Vegetables ◽  
Metabolic Diseases ◽  
Therapeutic Agents ◽  
Adipose Tissue Inflammation ◽  
Cellular Mechanisms ◽  
Tissue Inflammation ◽  
Cholesterol Levels ◽  
Naturally Occurring ◽  
Pro Inflammatory Cytokines

Abstract Flavonoids are polyphenolic compounds naturally occurring in fruits and vegetables, in addition to beverages such as tea and coffee. Flavonoids are emerging as potent therapeutic agents for cardiovascular as well as metabolic diseases. Several studies corroborated an inverse relationship between flavonoid consumption and cardiovascular disease (CVD) or adipose tissue inflammation (ATI). Flavonoids exert their anti-atherogenic effects by increasing nitric oxide (NO), reducing reactive oxygen species (ROS), and decreasing pro-inflammatory cytokines. In addition, flavonoids alleviate ATI by decreasing triglyceride and cholesterol levels, as well as by attenuating inflammatory mediators. Furthermore, flavonoids inhibit synthesis of fatty acids and promote their oxidation. In this review, we discuss the effect of the main classes of flavonoids, namely flavones, flavonols, flavanols, flavanones, anthocyanins, and isoflavones, on atherosclerosis and ATI. In addition, we dissect the underlying molecular and cellular mechanisms of action for these flavonoids. We conclude by supporting the potential benefit for flavonoids in the management or treatment of CVD; yet, we call for more robust clinical studies for safety and pharmacokinetic values.

Homocysteine Levels Show Significant Differences among Mediterranean Dietary Quality Index Variables Compared to Folate and Vitamin B12 Status in Women

2015 ◽  
Vol 85 (3-4) ◽  
pp. 202-210 ◽  
Author(s):  
Ivona Višekruna ◽  
Ivana Rumbak ◽  
Ivana Rumora Samarin ◽  
Irena Keser ◽  
Jasmina Ranilović
Keyword(s):  
Mediterranean Diet ◽  
Diet Quality ◽  
Quality Index ◽  
Fruits And Vegetables ◽  
Reproductive Age ◽  
Dietary Quality ◽  
Vitamin B ◽  
Cross Sectional ◽  
Poor Diet ◽  
The Mediterranean

Abstract. Results of epidemiologic studies and clinical trials have shown that subjects following the Mediterranean diet had lower inflammatory markers such as homocysteine (Hcy). Therefore, the aim of this cross-sectional study was to assess female diet quality with the Mediterranean diet quality index (MDQI) and to determine the correlation between MDQI, homocysteine, folate and vitamin B12 levels in the blood. The study participants were 237 apparently healthy women (96 of reproductive age and 141 postmenopausal) between 25 and 93 years. For each participant, 24-hour dietary recalls for 3 days were collected, MDQI was calculated, and plasma Hcy, serum and erythrocyte folate and vitamin B12 levels were analysed. Total MDQI ranged from 8 to 10 points, which represented a medium-poor diet for the subjects. The strength of correlation using biomarkers, regardless of group type, age, gender and other measured parameters, was ranked from best (0.11) to worst (0.52) for olive oil, fish, fruits and vegetables, grains, and meat, in this order. Hcy levels showed the best response among all markers across all groups and food types. Our study shows significant differences between variables of the MDQI and Hcy levels compared to levels of folate and vitamin B12 in participants with medium-poor diet quality, as evaluated according to MDQI scores.

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