Fruits and vegetables research papers

Research Original Old Residents' Association Book Cabinet The Lowell Historical Society maintains numerous collections of writings, documents and photographs which are open for public research.

Fruits and vegetables research papers

The more frequent source of vitamin B in association with plant food is external contamination with bacteria, often of fecal origin The fact that stool vitamin B can be important in human vitamin B economy was delineated by James Halsted 11 working with Iranian vegans who did not get vitamin B deficiency Halsted went to Iran and found that they grew their vegetables in night soil human manure.

The vegetables were eaten without being carefully washed and the amount of retained vitamin B from the manure- rich soil was adequate to prevent vitamin B deficiency. Note that the first part of the quote above-- that B on plant foods is primarily present as contamination-- may be outdated, per the more recent research of Mozafar [].

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Therefore, let's now take a closer look at this research. Mozafar [] grew soybeans, barley, and spinach on three kinds of soils-- unenriched soil controlsoil fertilized with raw, dried cow dung, and soil enriched with vitamin B The Fruits and vegetables research papers of Mozafar [] in this paper will omit the results from soil enriched with B, as it is not an economically feasible agricultural practice at present.

Vitamin B levels were measured using "radioisotope dilution" [Mozafarp. This assay claims a high resolution in distinguishing between true B and analogues. Plants may absorb B from the soil. Considering the reports that plant roots and leaves can absorb the relatively large molecules of B from nutrient solutions and transport them to other plant parts Mozafar and Oertli a and the belief that plants cannot synthesize this vitamin Friedrich, ; Lehninger, ; Smith,it seems that the observed increase in the concentration of B in barley seeds and spinach leaves fertilized with cow dung is mostly if not fully due to the uptake of this vitamin by the roots from the soil and not due to superficial contamination or an increased synthesis within the plant.

The claim that the B in the above experiment was mostly true B and absorbed and taken up by the plants-- is surprising in light of the known presence of B analogues in many foods see the papers by Herbert for discussions on this point.

Fruits and vegetables Research Papers -

It also raises an important issue: A later paper by Mozafar-- i. Note also that the second part of the above quote contradicts the claim by Herbert that B is usually found primarily externally in plants.

B found in tested plant foods. Mozafar found that the levels of B in barley and spinach grown in untreated control soil versus soil treated with cow dung were significantly different.

Fruits and vegetables research papers

However, the B levels of soybeans were not significantly different for the two soil types. The B measurements in Mozafar [] are frankly hard to interpret as-is. That is, the measurement unit utilized, i.

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To help readers understand the Mozafar results, a part of the results are used below to estimate the amount of each plant food by itself needed to get 2 mcg of B per day.

The last 2 columns in the table below are the most important-- they show the estimated weight in kilograms and in pounds of raw plant foods required to satisfy daily B requirements.

Amount of food necessary to achieve 2 mcg daily requirement of B Dry wt.Fruit has been recognized as a good source of vitamins and minerals, and for their role in preventing vitamin C and vitamin A deficiencies. People who eat fruit as part of an overall healthy diet generally have a reduced risk of chronic diseases.

Fruits and vegetables research papers

Continued Green Tea, Black Tea: Packed With Antioxidants "The scientific evidence about tea is evolving and I think it's compelling," Jeffrey Blumberg, PhD, of the Friedman School of Nutrition. Fruit and Vegetables for Health is a report of a joint WHO/FAO workshop.

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It includes a framework as an important tool for governments and other stakeholders to promote fruit and vegetables for health. California Donated Fresh Fruits or Vegetables Tax Credit Background.

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