Cyanide, Nitrate and Nitrite Content of Some Leafy Vegetables and Fruits Commonly Consumed in the South-East of Nigeria

2011 ◽  
Vol 10 (12) ◽  
pp. 1190-1194 ◽  
Author(s):  
Friday O. Uhegbu ◽  
Ifeanyi Elekwa ◽  
Emeka E.J. Iweal ◽  
Ijeoma Kanu
Keyword(s):  
Leafy Vegetables ◽  
The South ◽  
Nitrate And Nitrite ◽  
Vegetables And Fruits ◽  
Nitrite Content

scholarly journals Nitrate and nitrite in commercial samples of conventional, organic and hydroponic leafy vegetables

2019 ◽  
pp. 812 ◽  
Author(s):  
A.L. Nascimento
Keyword(s):  
Limit Of Detection ◽  
Great Variability ◽  
Leafy Vegetables ◽  
Conventional System ◽  
Fresh Weight ◽  
Hydroponic System ◽  
Capillary Electrophoresis Method ◽  
Electrophoresis Method ◽  
Nitrate And Nitrite ◽  
Nitrite Content

The aim of this research was to investigate along four weeks the nitrate and nitrite levels in commercial samples of leafy vegetables (lettuce, watercress, spinach, and rocket) of different growing systems (hydroponic, conventional and organic) using a capillary electrophoresis method. In all samples, nitrite content was below the limit of detection, while nitrate was quantified. The nitrate concentrations in the leafy vegetables ranged from 239.26 to 7873.00 mg kg-1 in fresh weight, with more expressive values found for lettuce, watercress and rocket in the hydroponic system, while for spinach the highest values were found in the conventional system. However, the lettuce can be highlighted as the vegetable with the lowest content of nitrate and the rocket the vegetable with the highest content of this compound. Despite the great variability, the nitrate levels found for most samples were in accordance with international requirements.

scholarly journals Identification of the nitrate and nitrite content in leafy vegetables from the city of Zliten: تحديد محتوى النترات والنتريت في الخضار الورقية من مدينة زليتن

2021 ◽  
Vol 5 (5) ◽  
pp. 131-126
Author(s):  
Ismail A. Ajaj, Zeglam, Z., Benfaid, E., Shneb, M., Rabya A Ismail A. Ajaj, Zeglam, Z., Benfaid, E., Shneb, M., Rabya A
Keyword(s):  
International Standards ◽  
Leafy Vegetables ◽  
Global Standards ◽  
Nitrate Concentrations ◽  
Nitrate And Nitrite ◽  
Agricultural Areas ◽  
The City ◽  
Nitrite Content

    The study identifies the nitrate (NO3) and nitrite (NO2) content in leafy vegetables (parsley, chard, coriander) in three agricultural areas in Zliten (Azdo, Dafniya, Madjer) using the colorimeter dr / 980 device, and assesses whether the content is within the comparatively with allowable concentrations. The results obtained from this study show that the nitrate concentrations in all samples examined are within the global standards, with the highest level of 5.5 ppm found in chard samples collected from the area of Azdo. As for nitrite, the concentrations found in the studied samples are higher than nitrate concentrations. Overall, the nitrate and nitrite content are found to be within the permitted concentrations based on international standards, where the highest concentration of nitrite of 60 ppm is recorded in parsley samples from the Dafniya area.

scholarly journals Evaluation of the nitrate and nitrite content of vegetables commonly grown in Slovenia

2017 ◽  
Vol 12 (2) ◽  
Author(s):  
Veronika Kmecl ◽  
Tea Knap ◽  
Dragan Žnidarčič
Keyword(s):  
European Union ◽  
Human Body ◽  
Daily Intake ◽  
Agricultural Area ◽  
Segmented Flow ◽  
Maximum Permissible Level ◽  
Eu Legislation ◽  
Permissible Level ◽  
Nitrate And Nitrite ◽  
Nitrite Content

Nitrate (NO<sub>3</sub><sup>–</sup>) and nitrite (NO<sub>2</sub><sup>–</sup>) levels of a total 1195 samples of nine different vegetables (lettuce, potato, cabbage, carrot, string beans, tomato, cucumber, cauliflower and pepper) collected at several locations of an intensive agricultural area in Slovenia were analysed during a period of 13 years. The content of NO<sub>2</sub><sup>–</sup> and NO<sub>3</sub><sup>–</sup> ions in commercial mature samples was determined using a segmented flow analyser. The average NO<sub>3</sub><sup>–</sup> content was the highest in lettuce (962 mg/kg), cabbage (795 mg/kg), string beans (298 mg/kg), carrot (264 mg/kg), cauliflower (231 mg/kg), potato (169 mg/kg) and was moderately high in cucumber (93 mg/kg) and pepper (69 mg/kg). A low NO<sub>3</sub><sup>–</sup> content was found in tomato (2<sup>–</sup> did not exceed 0.5 mg/kg, with the exception of potato (1.08 mg/kg). Six samples of lettuce exceeded the maximum permissible level of NO<sub>3</sub><sup>–</sup> according to current European Union (EU) legislation. Based on the results of our investigation, we assessed the approximate daily intake (DI) of NO<sub>3</sub>– and NO<sub>2</sub><sup>–</sup> to human body. The results indicated that with the consumption of potato, the daily intake per inhabitant is close to the acceptable DI permitted in EU.

scholarly journals Transrenal passage of nitrates and nitrites in calves (short communication)

1999 ◽  
Vol 42 (3) ◽  
pp. 235-240
Author(s):  
A. Jacková ◽  
P. Siklenka ◽  
J. Pleva
Keyword(s):  
Short Communication ◽  
Clinical Signs ◽  
Potassium Nitrate ◽  
Mean Value ◽  
Significant Elevation ◽  
Total Hemoglobin ◽  
The Mean ◽  
Nitrate And Nitrite ◽  
Nitrite Content

Abstract. In a study with 12 calves on milk nutrition, the course of methemoglobinemia as well as ttansrenal passage of nitrates and nitrites after single per os administrations of 4 g NaNO2 per animal and 30 g KNO3 per animal in the form of water Solutions has been observed. The response of the organism of calves to per os administered doses of sodium nitrite and potassium nitrate was observed by the determination of tlie methemoglobin percentage in blood and the nitrate and nitrite content in urine before the administration ofthe respective dose and after h 1, 2, 3 and 4 after the administration. A significant elevation in the values of methemoglobin was recorded after h 2 after the administration of 4g NaNO3 per animal. The mean value of methemoglobin in blood was 18.84% of total hemoglobin. A slight decline in the values occurred as early as after h 3 after the administration. Of clinical signs, cyanosis of visible mucosae was observed. The highest nitrite and nitrate values in urine were determined after h 2 after per os administration of 4g NaNO2, With the administration of 30g KNO3 per animal, the most pronounced elevation in methemoglobinemia was observed after h 3, when the means values of methemoglobin was 11,75%. Of clinical signs, only slight cyanosis of mucosae was detectable. Maximum values of nitrates in urine of experimental calves after h 3 after the administration of 30 g KNO3 per animal, with the mean value of 29,9 mM NO3−1 clearly demonstrate a good transrenal passage of nitrates in calves on milk nutrition.

Nutritional Status of Rural Pregnant Women of Haryana State, Northern India

2002 ◽  
Vol 16 (2) ◽  
pp. 121-131 ◽  
Author(s):  
Sudesh Jood ◽  
Saroj Bishnoi ◽  
Neelam Khetarpaul
Keyword(s):  
Pregnant Women ◽  
Fats And Oils ◽  
Leafy Vegetables ◽  
Dietary Intakes ◽  
Food Groups ◽  
Green Leafy Vegetables ◽  
Northern India ◽  
Daily Food ◽  
Limited Food ◽  
Vegetables And Fruits

Average daily food intakes of 90 rural pregnant women belonging to arid, semi-arid and wet zones of Haryana State, Northern India have been determined. As a result of questionnaires and interviews, food intake for three consecutive days were collected. Intakes of cereals, pulses, roots and tubers, other vegetables and sugar and jaggery by the respondents were significantly lower than the prescribed Indian Recommended Dietary Intakes (RDI). The consumption of milk and milk products and fats and oils was significantly higher than that of RDI whereas, green leafy vegetables and fruits were the most limited food items. As the diets of rural pregnant women were inadequate with respect to some food groups, which resulted in lower intake of protein, β-carotene and ascorbic acid. Despite their poor intake their weights and heights were not much below the standards. BMI classification projected that only about one fourth of the respondents were underweight. There is pressing need to educate rural pregnant women regarding their increased nutritional requirements.

scholarly journals Wild food plants of Remote Oceania

2012 ◽  
Vol 81 (4) ◽  
pp. 371-380 ◽  
Author(s):  
Will C. McClatchey
Keyword(s):  
Western Pacific ◽  
Leafy Vegetables ◽  
Food Plants ◽  
Wild Food ◽  
Wild Food Plants ◽  
Wild Foods ◽  
Agricultural Society ◽  
Tropical Western Pacific ◽  
Agricultural Societies ◽  
Vegetables And Fruits

Agricultural societies partly depend upon wild foods. Relationships between an agricultural society and its wild foods can be explored by examining how the society responds through colonization of new lands that have not been previously inhabited. The oldest clear example of this phenomenon took place about 5000 years ago in the tropical Western Pacific at the “boundary” interface between Near and Remote Oceania. An inventory of wild and domesticated food plants used by people living along “the remote side of ” that interface has been prepared from the literature. This was then assessed for the roles of plants at the time of original colonization of Remote Oceania. The majority of species are wild foods, and most of these are used as leafy vegetables and fruits. The wild food plants mostly serve as supplements to domesticated species, although there are a few that can be used as substitutes for traditional staples.

The recalcitrance of oxalate, nitrate and nitrites during the controlled lactic fermentation of commonly consumed green leafy vegetables

2015 ◽  
Vol 45 (2) ◽  
pp. 336-346 ◽  
Author(s):  
A. Jagannath ◽  
Manoranjan Kumar ◽  
P S Raju
Keyword(s):  
High Performance ◽  
Leafy Vegetables ◽  
Spontaneous Fermentation ◽  
Content Type ◽  
Lactic Fermentation ◽  
Green Leafy Vegetables ◽  
Beneficial Effects ◽  
Balanced Diet ◽  
Significant Difference ◽  
Nitrate And Nitrite

Purpose – Green leafy vegetables (GLVs) are important components of a balanced diet especially in developing countries where the major requirements of micronutrients are met. However, GLVs also contain significant amounts of oxalate, nitrate and nitrites, whose role in the human diet is constantly changing. The current study explored the behavior of nitrate, nitrites and oxalate in lactic-fermented GLVs with an intention to develop functional foods based on them. Design/methodology/approach – Selected strains of beneficial lactic acid bacteria were used for the controlled fermentation of GLV, while an identical portion was subjected to spontaneous fermentation. The nitrate and nitrites were monitored spectrophotometrically, while oxalate contents were quantified by both titrimetric and by high-performance liquid chromatography throughout the duration of fermentation. Findings – More than 90 per cent of individual constituents studied remained intact in the GLVs paste after the six-day controlled fermentation period. However, there was significant difference between the controlled and spontaneously fermented samples in terms of oxalate, nitrate and nitrite contents. Originality/value – Controlled lactic fermentation although superior in all other aspects may not be able to lower the anti-nutrients present. The advantages of spontaneous fermentation vis-à-vis controlled fermentation are discussed. The work will bring out the importance of the beneficial effects of GLVs and the effect of lactic fermentation.

Sign in / Sign up

Export Citation Format

Share Document