Major source of macro and micronutrients - Free Essay Example

Sample details Pages: 7 Words: 2205 Downloads: 6 Date added: 2017/06/26 Category Statistics Essay Did you like this example? Rice (Oryza sativa (2n = 24) is a monocot plant and belongs to the Poaceae family and Oryzoidea subfamily. It occupies almost one-fifth of the total land area under world cereals. It covers about 148 million hectares annually that is roughly 11 percent of the world-cultivated land. Don’t waste time! Our writers will create an original "Major source of macro and micronutrients" essay for you Create order It is life for more than half of humanity and in past, it shaped the cultures, diets, and economies of billions of people in the world (Farooq et al., 2009). More than 90 percent of the worlds rice is grown and consumed in Asia where 60 percent of the world population lives. The world major rice consuming countries are China, India, Egypt, Indonesia, Malaysia, Bangladesh, Vietnam, Thailand, Myanmar, Philippines, Japan, Brazil, South Korea and USA that consume 135, 85, 39, 37, 26, 18, 10, 10, 9.7, 8.7, 8.1, 5.0 and 3.9 million metric ton, respectively (Meng et al., 2005; USDA, 2003-04). Biochemical and nutritional aspects of rice Rice is a major source of macro and micronutrients for human being. It feeds more than two billion people worldwide and is the number one staple food in Asia. It provides over 21 percent of the calorific needs of the worlds population and up to 76 percent of the calorific intake of the population of South East (SE) Asia (Fitzgerald et al., 2009). It is mostly consumed as a polished grain, which usually lacks its nutritional components such as minerals and vitamins 41 P. Lucca et al., Genetic engineering approaches to enrich rice with iron and vitamin A, Physiol. Plant. 126 (2006), pp. 291-303. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (7)( Lucca et al., 2006). Since the advent of molecular techniques, recently genetically modified rice verities have been developed, which contains more nutritional aspects like minerals and vitamins in endosperm (Vasconcelos et al., 2003; Paine et al., 2005; Fitzgerald et al., 2009). The major value-added nutritional protein c onstituents of the rice. Rice Position in Pakistan In Pakistan, besides its importance as a food crop, rice is the second important component of daily diet of bulk of the population after wheat. About 23% of the total foreign exchange earnings is shared by rice and thus called as Golden Grain of Pakistan (Shah et al., 1999). Around one third of total production is annually exported and two third is locally consumed to meet food needs. Rice is also used in dishes for special occasions (Sagar et al., 1988). Pakistan is the third largest rice exporting country. In Pakistan, rice occupies about 10% of the total cultivated area, accounts for 6.1% of value added in agriculture and 1.3% in gross domestic product. Production of rice during 2007-08 was estimated at 5,540 thousand tones, 10.4% higher than last year with 6.1% increase in yield per hectare (Anonymous, 2006). Area, production and yield of rice for the last 5 years are shown in Fig. 1. Varieties of basmati rice, sub-species of indica, are economically important due to the high quality of the grain and constitute an important source of revenue for two major rice-growing countries in Asia (Pakistan and India). The international market for basmati rice has always been higher than that of the moderate varieties. Pakistans annual rice export stands at about 2.5 million tons, which earn a total of 513.0 million dollars for the country (Anonymous, 1998). During the year 2005-2006 rice export was about one billion US$ (Bashir et al., 2007). Rice growing areas of Pakistan Depending upon the irrigation water availability, rice can be grown in any part of the country from sea level up to 2500m height. Pakistan has a climate and a potential in soil that permits the expectations of a most bright future for the productions of rice. Considering temperature difference, optimum sowing seasons and the varietals performance, rice growing areas can be divided in four ecological zones (Salim et al., 2003; Table-1.2). Rice is grown in all four provinces of Pakistan. However, the acreage under rice varies greatly from one province to another. The Punjab and Sindh are the major rice growing provinces with about 59% and 33%, respectively of the total rice in the country. The remaining 5% of the area is planted in Baulochistan and 3% in NWFP (Bhatti and Anwar, 1994). Despite the fact that its cultivated area is far smaller than wheat (more than 7.24 million), it has a great impact on national economy due to two reasons. Firstly, rice is the only crop which can be grown successfully in vast chunks of salt-ridden and water-logged areas where it facilitates not only the reclamation of land for the cultivation of other crops but also provide food. Secondly, superior quality basmati has a consistently increasing demand in the foreign countries. Consequently, there is a great scope for augmenting the foreign exchange earning by exporting it in bigger quantity. In view of these facts, it is highly desirable to increase the production and improve the quality of rice the quality is particularly more important from the trade view point, as it is instrument entail in increasing and then sustaining the demand in the foreign market in competition with other rising exporting countries. There in no denying the fact that purity is the very sole of quality. The impurities not only restrict the export trade, but also inflict losses to the growers, millers and the consumers alike. Therefore, these should possibly be minimized (Saleem et al., 2003). Major rice varieties in Pakistan More than 20 rice varieties have been released for general cultivation in Pakistan (Bashir et al., 2007). A general description of agronomical and physiochemical characteristics of these varieties. Importance of Basmati Rice in Pakistan There are thousands of rice varieties and landraces, which differ with respect to plant and grain characteristics. Of these, aromatic (Basmati) rice constitutes a small but special group that is regarded as best in grain quality, superior aroma and usually used for special dish preparation (Khush and dela Cruz, 2001). Quality of rice may be considered from the view point of size, shape and appearance of grain, milling quality and cooking properties (Dela Cruz and Khush, 2000). Pakistan is famous for the production and export of Basmati rice. The origin of the word Basmati can be trade to the word Basmati meaning earth recognized by its fragrance. The Hindi word Bas was derived from the Pakrit word BAS and has a Sanskrit root Vassy (Aroma), while Mati originated from Mayup (ingrained from the origin). In common usage Vas is pronounced as Bas and while combining Bas and Mayup, the later changed to Mati thus the word Basmati (Ahuja et al., 1995; Gupta, 1995). The fragrance of basmati rice is most closely associated with the presence of 2-acetyl-1-pyrroline (Buttery et al., 1983; Lorieux et al., 1996; Widjaja et al., 1996; Yoshihashi et al., 2002). Although many other compounds are also found in the headspace of fragrant rice varieties (Widjaja et al., 1996) possibly due to secondary effects related to the genetic background of the rice variety, 2-acetyl-1-pyrroline is widely known to be the main cause of the distinctive basmati and jasmine fragrance. The desirability of fragrance has resulted in strong human preference and selection for this trait. Non-fragrant rice varieties contain very low levels of 2-acetyl-1-pyrroline, while the levels in fragrant genotypes are much higher (Widjaja et al., 1996). Basmati rice occupies a prime position in the Indian subcontinent and is becoming increasingly popular in Middle East, Europe, USA and even in non-traditional rice growing countries such as Australia (Bhasin, 2000). High-quality, traditional Basmati rice varieties command premium prices, more than three times that of non-Bamati rices in the world market due to its exquisite aroma, superfine grain characteristics and excellent cooking (extra elongation, soft and flaky texture) qualities (Bhasin, 2000; Singh et al., 2000a; Khush and dela Cruz, 2002). Basmati rice traditionally grown in the Himalayan foothills regions of Pakistan and India, and the name is traditionally associated with this region. Basmati rice is the result of centuries of selection and cultivation by farmers (Khush, 2000). Cultivation of basmati rice in mainly confined to the Kallar tract (Gujranwala, Sheikhupura and Sialkot districts) of Punjab province. Basmati rice always fetch a higher price in the domestic as well as in the international market due to their peculiar quality features such as pleasant aroma, fine grain, extreme grain elongation (7.6mm long) and soft texture on cooking. In spite of hard competition from India, Thailand and the United States, Pakistan enjoys a good position in the global trade of aromatic rice and every year earns a lot of foreign exchange (Akram and Sagar, 1997). Genetic Diversity in Rice Diversity among organisms is a result of variations in DNA sequences and of environmental effects. The diversity in crop varieties is essential for agricultural development for increasing food production, poverty alleviation and promoting economic growth. The available diversity in the germplasm also serves as an insurance against unknown future needs and conditions, thereby contributing to the stability of farming systems at local, national and global levels (Singh et al, 2000). In crop improvement program, genetic variability for agronomic traits as well as quality traits in almost all the crops is important, since this component is transmitted to the next generation (Singh, 1996). Study of genetic divergence among the plant materials is a vital tool to the plant breeders for an efficient choice of parents for plant improvement. Genetically diverse parents are likely to contribute desirable segregants and/or to produce high heterotic crosses. Parents identified on the basis of dive rgence for any breeding program would be more promising (Arunachalam, 1981). In early 1970s, public authorities felt the need that genetic resources should be collected, maintained and conserved, especial focus was on important food crops e.g wheat, rice, barley etc (Hawkes 1983; Bellon et al., 1998; Barry et al., 2007). This was the first official attempt to preserve genetic diversity. Currently different genetic diversity assessment methods including morphological, biochemical and molecular markers are available. Morphological Markers used to study genetic diversity Morphological evaluation is the oldest and considered as the first hand tool for detection of genetic variation in germplasm (Smith and Smith, 1989). It is cheap and convenient. It requires not any in depth knowledge at genomic or proteomic level. However, morphological markers are relatively less effective for genetic diversity analysis due to sensitivity to environmental influences and developmental stage of the plant (Werlemark et al., 1999). It takes long time, requires seasonal changes and quite laborious. The genetic variability for some of the traits needed for high yield performance and stress tolerance is limited in cultivated germplasm. This is because a small core of adapted progenitors has been used repeatedly in rice breeding programs such that the genetic base of rice has become narrow (Moncada et al. 2001; Hargrove et al. 1980; Dilday 1990). Introgression of genes from other rice species can provide genetic variation to improve rice and meet the challenges affecting ri ce production. Morphological traits including both qualitative and quantitative ones are used to evaluate genetic relationship among genotypes (Goodman 1972; Bajracharya et al., 2006). Fida et al. (1995) reported the evaluation of elite rice genotypes for agronomic traits during 1992 at NARC, Islamabad. All the genotypes possessed similar grain quality. Agronomic evaluation was used for screening of lines with desired performance by Akram et al. (1995), in field leading to the identification of varieties possessing longer and fine grains as donors for utilization in breeding programmes aimed for the improvement of grain length in Basmati rice. Iqbal et al. (2001) morphologically evaluated selected landraces for paddy yield and other important agronomic traits as a propose to select parents for hybridization program. All the landraces possessed some desirable agronomic traits so these proved effective in rice breeding programmes. Koutroubas et al. (2004) described variation in grain quality traits among some European rice lines. They concluded that these lines could be used as parents for introgression of desired traits into different rice cultivars grown in Europe. They also suggested that the interrelations among grain quality traits found in these lines could be useful to study the relationship among their grain quality components and for improving selection criteria. Nabeela et al. (2004) evaluated fifteen agronomical important traits in landrace genotypes of rice collected from various parts of Pakistan. A significant amount of genetic variation was displayed for most of the traits examined. The coefficient of variation was more than 10% for all the characters with exception of grain length. Seven accessions with best performance for individual character were identified, by exploiting their genetic potential. These genotypes can have a beneficial use in the breeding programs. Nepali rice landrace diversity was evaluated by Bajracharya et al. (2005) by usin g morphological traits as one of the parameter for selection. The genotypes varied only for few quantitative traits controlled by major genes; husk color, seed coat and panicle traits. Agronomic characterization also helped to decide which traits need to be improved for further crop improvements. Zaman et al. (2005) studied fifteen different rice varieties which showed that the different morphological characteristics such as the yield, tiller number per hill and filled grains per panicle did not contribute towards the total divergence. This suggested that the breeding improvement of these morphological characteristics have the little possibility. Little phenotypic variation at farm level was observed in Vietnamese rice by Fukuoka et al. 2006, which was considered to be the result of genetic drift and selection by the farmers, on farm conservation of the landraces of rice is considered to be under a force to decrease phenotypic diversity. Different phenotypic profiles contribute to t he conservation of regional genetic diversity of the landraces of rice. Veasey and colleagues (2008) investigated the genetic variability among different rice species from South in a greenhouse experiment. They showed a significant difference (p

Physical and Cognitive Development in Adolescence Assignment

Essays on Physical and Cognitive Development in Adolescence Assignment The paper "Physical and Cognitive Development in Adolescence" is a good example of an assignment on psychology.   Adolescence is the transition from childhood to adulthood, and it lasts from age 11 or 12 until the early twenties or late teens. Puberty marks the end of childhood and it is triggered by hormonal changes. These changes can affect behavior and moods. Puberty usually lasts for four years, and it begins earlier in girls than boys (Kail Cavanaugh 243). During this stage, both boys and girls undergo a growth spurt. They begin to develop primary characteristics, which include the reproductive organs, and secondary characteristics such as the growth of pubic hair around their genitalia. The leading characteristics of sexual maturity include menstruation, for females, and the production of sperms, for males (Kail Cavanaugh 296). Menarche occurs between the age of 12 and 13 while spermarche occurs at age 13. The adolescents are often concerned with their body images that lead to obsessive dieting, especially in girls. Peer pressure is more influential than parents’ pieces of advice and guides, and this leads to drug abuse and indulgence in criminal activities. Depression is also highly prevalent among the adolescent especially girls.   First, the social environment significantly affects the onset of puberty. I have since known that the onset of puberty is standardized in spite of a teenager’s social environment. According to Belsky, Draper, and Steinberg, girls whose mothers use harsh punishment on them usually experience their first menstrual cycle at a younger age. Additionally, Menarche occurs in younger girls who experience depression or chronic stress (Kail Cavanaugh 298). I also learned that early maturation varies across ethnic or racial groups. For instance, sexual activity, of early-maturing Latinas, was directly linked with having older boys, in the peer groups, who influence them to engage in negative activities such as smoking, drinking, and sex. From the leadership perspective, I learned that adolescents’ working memory almost has the same capacity as adults’ working memory (Kail Cavanaugh 246). This means that they are capable of storing information required for a cognitive proc ess. The processing speed is also sufficient to process information more efficiently. Additionally, early maturing boys are likely to become leaders because of self-confidence and high self-esteem, unlike early maturing girls, who are unlikely to become leaders because of the indifferences they have in social situations.

Blood Pressure in Type 2 Diabetes Samples †MyAssignmenthelp.com

Question: Discuss about the Blood Pressure in Type 2 Diabetes. Answer: Blood pressure lowering in people with type 2 diabetes in Australia The burden of diabetes and hypertension is increasing globally. Indigenous Australians who have type 2 diabetes tend to experience high blood pressure (Burrow Ride, 2016). Hypertension in people with type 2 diabetes is associated with the risk of cardiovascular diseases. Some of the cardiovascular events that might occur in these people include myocardial infarction and stroke. Empirical evidence suggests that lowering blood glucose in persons with type II diabetes has significant benefits in preventing co-morbidity and death in people with type 2 diabetes. Various interventions can help to lower blood pressure, but the treatments should be personalised based on the needs of the patient with diabetes. Pharmacological and non-pharmacological interventions can help to control blood pressure in Australians with type II diabetes. Non-pharmacological interventions include diet and lifestyle modification. Weight loss lowers blood pressure significantly. For instance, losing a weight of 22lb lowers blood by 10-20mmHg (Thomas, 2017). Additionally, regular physical activity has positive benefits in lowering blood pressure for patients with type II diabetes. Regular exercise in individuals can lower blood pressure as well as enhance response to blood pressure-lowering medications. Aerobic exercises are very effective in lowering blood pressure (Thomas, 2017). Diet modifications include adopting diets with low sodium and high potassium-based foods. Apart from considering salts in diet, healthy eating should also be considered. The inclusion of vitamins and fibre can have benefits for those with type 2 diabetes. Low-alcohol consumption can also help in lowering blood pressure in Australians w ith type 2 diabetes. Pharmacological treatment has positive effects on lowering blood pressure in patinets with type II diabetes. Patients are advised to use medicines to lower blood pressure if non-pharmacological interventions are ineffective. In case, blood pressure remains stable at 140/80mmHg medicines might be a good choice. The two types of medications that have benefits in lowering blood pressure among patients with type II diabetes are Angiotensin converting enzyme inhibitors (ACEI) and angiotensin receptor blockers (ARBs) (Grossman Grossman, 2017). Both ARBs and ACEI have been found to have positive effects in lowering blood pressure. ARB has been found to have both short- and long-term blood pressure-lowering impacts in albuminuric hypertensive patients with diabetes (Jameson De Groot, 2015). Although medicines have been shown to manage hypertension in persons with type II diabetes, ACE and ARBs might not be effective in controlling blood pressure in some patients. References Burrow, S., Ride, K. (2016). Review of diabetes among Aboriginal and Torres Strait Islander people. Australian Indigenous HealthInfoNet . Grossman, A., Grossman, E. (2017). Blood pressure control in type 2 diabetic patients. Cardiovascular diabetology , 16 (1), 3. Jameson, J. L., De Groot, L. J. (2015). Endocrinology: Adult and Pediatric E-Book. Elsevier Health Sciences. Thomas, M. (2017). Understanding Type 2 Diabetes: Fewer Highs, Fewer Lows, Better Health. Exisle Publishing.