Yam is composed mainly of starch (75-84% of the dry weight) with small amounts of proteins, lipids and most vitamins and is very rich in minerals (Shin et al., 2012). It is a good source of inulin, which is a form of sugar with low calorie value with immense benefits to diabetics. Its phyto-nutritional profile comprises of dietary fiber, and antioxidants, in addition to traces of minerals and vitamins (Slavin et al., 2011). Plant carbohydrates mainly include celluloses, gums and starches. The physical properties of starch grains influence the digestibility and processing qualities of tropical root and tubers. In addition to starch and sugar, root crops also contain some non-starch polysaccharides; including celluloses, pectins and hemicelluloses, as well as other associated structural proteins and lignins, which are collectively referred as dietary fibre. The protein content and quality of tropical roots and tubers (Table 1.6) is …show more content…
….. 11.9 …… Sweet potato tips ……. 86.1 2.7 ….. …… …… …… Source: (FAO, 1972) Tropical roots and tubers exhibit very low lipid content. The lipids are mainly structural lipids of the cell membrane which enhance cellular integrity and help to reduce enzymatic browning (FAO, 1987). Most of the lipids present in tropical roots and tubers consist of equal amounts of unsaturated fatty acids, linoleic and linolenic acids and the saturated fatty acids, stearic acid and palmitic acid etc. Most of the roots and tubers are good source of potassium and consists of lower amount of sodium. This makes them particularly valuable and distinguishable in the diet of patients suffering from high blood pressure, who requires limited sodium intake (Valli et al., 2013). In such cases, the high potassium to sodium ratio may provide an additional health benefit. Yam can supply a substantial portion of the manganese and phosphorus and to a lesser extent the copper and magnesium. 1.9. Characteristics of Tropical roots and
Acid or base-catalyzed hydrolysis yields the component fatty acid, some examples of which are given in the following table, together with the alcohol component of the lipid. These long-chain carboxylic acids are generally referred to by their common names, which in most cases reflect their sources. Natural fatty acids may be saturated or unsaturated, and as the following data indicate, the saturated acids have higher melting points than unsaturated acids of corresponding size. The double bonds in the unsaturated compounds listed on the right are all cis (or
Starch, cellulose, glycogen, and chitin are all examples of polysaccharides. According to the BIO 1510 Lab Manual (2016) polysaccharides are not very soluble in water but can be made to go into solution through heating or agitation. Polysaccharides are excellent energy storage molecules because they are easily built and broken down by enzymes. Forming fairly compact structures, polysaccharides allow energy storage without the space required by a pool of free glucose monomers. Other polysaccharides form strong fibers that provide protection and structural support in both plants and animals. (Carbohydrates.” Home,
All cells are surrounded by a cell membrane, which has a semi-permeable phospholipid bilayer (Mitchell, 2015, Flinders University). A membrane is comprised of lipids, proteins and carbohydrates (Mitchell, 2015, Flinders University). Membrane permeability is determined by the structure of the membrane, meaning some larger substances will not pass through the membrane (Flinders University, 2015, p.36). Substances can enter the membrane passively (without the use of energy) or actively (requiring the use of ATP) (Mitchell, 2015, Flinders University). Beta Vulgaris (beetroot) contains a red pigment called Betalain, which is too large to pass
High potassium foods include fruits and vegetables such as tomatoes, potatoes, spinach, broccoli, beans, peas, avocados, oranges, strawberries, and bananas. Cereals, orange juice and dried fruits like raisins, prunes, apricots, and dates are also excellent sources of potassium. Fish (salmon, flounder, cod, and sardines), meat, chicken, milk, yogurt and nuts are also good sources of this mineral.
By writing Sisters of the Yam: Black Women and Self-Recovery Bell Hooks gave black women a chance to relate to one another on issues that we are often afraid to express. In PSC 318 we often discussed the stigma of being a “strong black woman” and the negative aspects of that stigma. In my eyes thee is nothing negative about being strong and there is surely nothing negative about being a black woman. But, as a black woman we are looked at providers, caregivers, mentors, mother figures, a shoulder to lean on and much more. Bell Hooks touches on the touchy subject in the black community and that is mental health. Often times as black people we worry about physical health and spiritual health, in the black community our answer to everything and anything going wrong in our lives is to pray about it. Yes, God can heal and help us but Bell Hooks tells us in writing Sisters of the Yam: Black Women and Self-Recovery that we need to take care of our mental health as well as pray. Black women rarely go to therapist to talk about their problems because they are so worried about helping everyone else handle their problems.
Anthocyanins, flavanols, flavanones,secoiridoids, phenolic acids, stilbenes, coumarins, and isoflavones form a large class of polyphenols, which are phenolic compounds. This study, however, focuses on one category of these phenolic compounds: phenolic acids. These particular compounds have been classified into two groups, namely hydroxycinnamic acids and hydroxybenzoic acids. The most common hydroxybenzoic acids are protocatechuic acid and gallic acid, while hydroxycinnamic acids include ferulic acid, coumaric acid, caffeic acid, chlorogenic acid, and sinapic acid, (Nigdikar, Williams, Griffin, & Howard). Unlike hydroxycinnamic acids, hydroxybenzoic acids usually occur at very low levels in some black radish, red fruits, and onions, accounting for about 10 ppm on a fresh weight basis. Protocatechuic ac...
arg.gov.sk.ca - arg.gov.sk.ca - arg.gov.sk.ca - arg.gov.sk.ca - arg.gov Carbohydrates supply 80-90% of dietary energy. Sugars, starch, cellulose and related substances are carbohydrates. Starch is more easily digested than cellulose. Grains are easy to digest as they are 60-80% starch. A recent study conducted by Sharon R. Bullimore et al.
Diabetes is chronic metabolic disease characterized by high blood glucose and insulin resistance resulting in hyperglycaemia and affects approximately 347 million people worldwide (WHO, 2013). Prevention and treatment often include being physically active, maintaining a healthy body weight, eating a healthy diet and avoiding saturated fat and tobacco use (WHO, 2013). However, studies have recently shown that carbohydrate consumption may be a risk factor for the development of the disease. The quality of carbohydrates has been of particular interest in many studies because of the rate of digestion and blood glucose response (Manuel-y-Keenoy et al, 2012). Carbohydrates that cause a rapid elevation in blood glucose (high GI) may have unfavorable metabolic effects compared to carbohydrates that cause a slow elevation in blood glucose (low GI) (Similia et al, 2011). The increased consumption of refined foods worldwide has been seen to have an affect on diabetes risk. In western population, the increased consumption of sugar-sweetened beverage has seen an associated increase in the rate of diabetes (Malik & Hu, 2012). In many Asian populations, a high consumption of refined grains, particularly white rice and noodles, has been reported to be associated with a higher risk of type 2 diabetes (Zuniga et al, 2014). However, foods high in fiber are thought to decrease the risk of type 2 diabetes (Weickert & Pfeiffer, 2008). There is ongoing research into gene-environment interactions and the way carbohydrate restriction has a varied effect on diabetes risk based on genetic variability . Although type 2 diabetes risk may be increased by consuming high GI, high GL and refined carbohydrates, consuming the right kind of carbohydrates su...
plasma membranes, meaning animals and plants contain lipids. In this paper I will display and
In the lab exercise regarding plant structure and function, we examined slides containing the different kinds of roots (monocot, dicot). We labeled the parts and pointed out the different roles of each in the plant structure. Also, we examined monocot stems and dicot stems in order to familiarize ourselves with its external and internal structures. We sketched and labeled the parts of the stem and looked closely at the positions of each part. In the last part of the lab, we classified leaves into different kinds according to their leaf venation, bases of leaves, and apices of leaves. As an additional exercise, we sketched 20 animals and classified them according to phylum and class. We were also able to discover the scientific and common names of the animals. Overall, the exercises we did enabled us to familiarize ourselves with plant structure thus, gaining a better understanding for plant life and its importance.
The most important nutrient categories are starches, minerals, sugars, and electrolytes. Starches and minerals fit into the area of complex carbohydrates. Complex carbohydrates are polysaccharides (many sugars bonded together). Because of the multiple bonds, polysaccharides are able to store energy for later use. Simple sugars make up the other group of carbohydrates. The bonding structures of simple sugars are much less advanced that than those of complex carbohydrates. This allows for the burning of simple sugars in an athlete's body. Electrolytes are a category of their own because they are helpful to an athlete all of the time, whether energy storage or energy burning is needed.
In this experiment, lipids from ground nutmeg are extracted using a combination of solvents and identify the lipids through chromatography. The purpose of using solvent combinations is to elute the lipids based on their polarity to binding of the silica gel. The chromatography is performed on a silica gel plate and the use of iodine to visualize the lipids. By calculating the Rf values for each compound and comparing them to the known lipids, we are able to distinguish the lipids within the grounded nutmeg.
...been grown for ages. Because of its long life, it has been studied a good deal and through all the studies has been declared a healthy vegetable. With all of its antioxidants and Vitamins, the sweet potato is one of the healthiest and one of the most used vegetables. It can be prepared in many forms from food to healing “potions”. We have benefitted greatly from the sweet potato.
Plant nutrition is area of plant biology that is of the utmost importance for the proliferation of plants. Without proper nutrition, plants would simply cease to exist unless drastic alterations were made. There are certain elements that are required for the plant to grow and reproduce; these elements are known as essential elements. There are three requirements of an essential element: the element must be required for the completion of the plant’s life cycle, the element must not be replaceable by another element in whole, and finally the element must be direction involved in the metabolism of the plant. Chemical compounds that are involved in proper nutrition have been designated as nutrients, and further classified as macronutrients and micronutrients. Macronutrients are needed for growth, metabolism, and many other functions, but are designated as “macro” because they are required in larger amounts. Macronutrients include carbohydrates, proteins, and fat molecules. Micronutrients have a much wider function that depends on the exact micronutrient. Micronutrients are designated as so because they are needed in much smaller amounts when compared to macronutrients. Examples of micronutrients include vitamins and minerals.