17 research outputs found

    Effect of alkaline hydrolysis on the quantity of extractable protein fractions (prolamin, albumin, globulin and glutelin) in Jatropha curcas seed cake

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    Jatropha curcas seeds were processed and defatted to obtain the seed cake. 60 g of them were separately moistened in 0.1 – 0.5 M NaOH and Ca(OH)2 solutions and autoclaved. Each of the autoclaved samples was separately divided into three portions. A portion was washed with ethanol,another with water and the third was left unwashed. Prolamin, albumin, globulin and glutelin fractions were extracted from the treated and untreated seed cakes and subsequently quantified. Untreated seedcake sample express 0.11 g/Kg prolamin, 4.06 g/Kg albumin, 4.23 g/Kg globulin and 10.91 g/Kg glutelin of seed proteins. In Ca(OH)2 treated cake, albumin and globulin had their maximum yield in ethanolwashed cake samples. The quantities obtained were 3.95 and 5.11 g/Kg of the seed protein, respectively. Prolamin and glutelin had their maximum yield in unwashed and water washed cake samples. The yields were 4.84 and 9.27 g/Kg of the seed protein, respectively. In NaOH treated seedcake, the four fractions had their maximum yield in water washed cake. The quantities were 3.37, and 3.64 g/Kg of seed protein for prolamin and albumin. The quantities of globulin and glutelin were 4.90 and 9.26 g/Kg of seed proteins. Quantity of prolamin increased in all the treated cake while the quantities of albumin, globulin and glutelin were reduced by the treatments

    The extraction of proteins from the neem seed (Indica azadirachta A. Juss)

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    Techniques for maximizing the extraction of protein from the neem seed (Indica azadirachta A. Juss) were investigated. Extractants used were sodium chloride and sodium sulphate solutions of varying concentration and pH. Maximum extractions of 17.86 g of extractable protein was obtained from 1 kg of crude protein, using 0.5 M NaCl solution at pH of 7.5. All the extracts were devoid of the usual neem smell and its bitter taste. As the pH increased from 7.0 to 7.5 there was steady increase in the quantity of extractable protein by sodium chloride solutions. However a decrease in the quantities of extractableproteins was observed at pH of 8.0 to 10 with sodium chloride solution. As the pH increased from 7.0 to 7.5 on the other hand, the quantities of the extract with sodium sulphate solutions decreased. While at pH of 8.0 to 9.5 the quantity of extractable protein increased, and the least quantity was obtained at pH of 10. 0.5 M NaCl at pH of 7.5 was found to be a better extractant for neem seed protein

    Effect of heat and alkaline hydrolysis on the amino acid profile of Jatropha curcas seed cake

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    In recent times, Jatropha curcas has attracted attention of various researchorganizations, governments, public and international developmental  agencies and industries in the tropics and subtropics due to its adaptability to semi-arid marginal sites, the possibility of using its oil as a diesel fuel substitute and its role in erosion control. In tropical countries it is well known for its medicinal properties and as an oilseed. The seeds of J. curcas are a good source of oil, yielding between 40 – 80 % oil. Although the seed cake meal is rich in protein, it is toxic to rats, mice, ruminants and humans due to the presence of antinutritional factors; thus, its use as food or feedsource has not been encouraging. However, recent findings indicate that after a proper detoxification process the seed meal can serve as a protein substitute in feed meals of animal feeds. The seeds of J. curcas were collected, dehulled, grounded and defatted to obtain the seed cake. The seed cake was divided into five portions, 60 g of each of the cake portion was separately moistened with 1 M, 2 M, 3 M, 4 M and 5 M NaOH solutions, respectively and autoclaved. Each of the autoclaved samples was washedwith water and later with ethanol. A 60 g of the seed cake which was not treated with NaOH, water and ethanol was labeled untreated. The treated and untreated seed cakes were thus analyzed for their crude protein contents as well as amino acid profile. The untreated seed cake afforded 63.02 % yield of crude protein, while the crude protein content of the treated seed cake was 70.53, 71.46, 67.76, 60.82 and 56.19 % for the 1– 5 M NaOH treated seed cake, respectively with the 2 M NaOH treated seed cake having the highest yield. The amino acid profile of the treated seed cake was similar and comparable to the values of WHO/FAO standard and those of soybeans. The seed can thus be used as an alternative  protein source in animal feed formulation after it has been properly  detoxified. If well processed, it would reduce competition between man and livestock for the conventional sources of proteins.Key words: Amino acid, Jatropha curcas, protein detoxificatio

    Pooled analysis of WHO Surgical Safety Checklist use and mortality after emergency laparotomy

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    Background The World Health Organization (WHO) Surgical Safety Checklist has fostered safe practice for 10 years, yet its place in emergency surgery has not been assessed on a global scale. The aim of this study was to evaluate reported checklist use in emergency settings and examine the relationship with perioperative mortality in patients who had emergency laparotomy. Methods In two multinational cohort studies, adults undergoing emergency laparotomy were compared with those having elective gastrointestinal surgery. Relationships between reported checklist use and mortality were determined using multivariable logistic regression and bootstrapped simulation. Results Of 12 296 patients included from 76 countries, 4843 underwent emergency laparotomy. After adjusting for patient and disease factors, checklist use before emergency laparotomy was more common in countries with a high Human Development Index (HDI) (2455 of 2741, 89.6 per cent) compared with that in countries with a middle (753 of 1242, 60.6 per cent; odds ratio (OR) 0.17, 95 per cent c.i. 0.14 to 0.21, P <0001) or low (363 of 860, 422 per cent; OR 008, 007 to 010, P <0.001) HDI. Checklist use was less common in elective surgery than for emergency laparotomy in high-HDI countries (risk difference -94 (95 per cent c.i. -11.9 to -6.9) per cent; P <0001), but the relationship was reversed in low-HDI countries (+121 (+7.0 to +173) per cent; P <0001). In multivariable models, checklist use was associated with a lower 30-day perioperative mortality (OR 0.60, 0.50 to 073; P <0.001). The greatest absolute benefit was seen for emergency surgery in low- and middle-HDI countries. Conclusion Checklist use in emergency laparotomy was associated with a significantly lower perioperative mortality rate. Checklist use in low-HDI countries was half that in high-HDI countries.Peer reviewe

    Global variation in anastomosis and end colostomy formation following left-sided colorectal resection

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    Background End colostomy rates following colorectal resection vary across institutions in high-income settings, being influenced by patient, disease, surgeon and system factors. This study aimed to assess global variation in end colostomy rates after left-sided colorectal resection. Methods This study comprised an analysis of GlobalSurg-1 and -2 international, prospective, observational cohort studies (2014, 2016), including consecutive adult patients undergoing elective or emergency left-sided colorectal resection within discrete 2-week windows. Countries were grouped into high-, middle- and low-income tertiles according to the United Nations Human Development Index (HDI). Factors associated with colostomy formation versus primary anastomosis were explored using a multilevel, multivariable logistic regression model. Results In total, 1635 patients from 242 hospitals in 57 countries undergoing left-sided colorectal resection were included: 113 (6·9 per cent) from low-HDI, 254 (15·5 per cent) from middle-HDI and 1268 (77·6 per cent) from high-HDI countries. There was a higher proportion of patients with perforated disease (57·5, 40·9 and 35·4 per cent; P < 0·001) and subsequent use of end colostomy (52·2, 24·8 and 18·9 per cent; P < 0·001) in low- compared with middle- and high-HDI settings. The association with colostomy use in low-HDI settings persisted (odds ratio (OR) 3·20, 95 per cent c.i. 1·35 to 7·57; P = 0·008) after risk adjustment for malignant disease (OR 2·34, 1·65 to 3·32; P < 0·001), emergency surgery (OR 4·08, 2·73 to 6·10; P < 0·001), time to operation at least 48 h (OR 1·99, 1·28 to 3·09; P = 0·002) and disease perforation (OR 4·00, 2·81 to 5·69; P < 0·001). Conclusion Global differences existed in the proportion of patients receiving end stomas after left-sided colorectal resection based on income, which went beyond case mix alone

    Chemical composition of leaf essential oil of Annona senegalensis Pers. (Annonaceae) growing in North Central Nigeria

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    Leaf essential oil of Annona senegalensis Pers. obtained by hydrodistillation was analysed using GC and GC/MS. The analyses revealed the abundance of oxygenated monoterpenes (65.0%). The major constituents were citronellal (30.0%), citronellol (14.8%), geranial (17.2%), thymol (8.1%), â – caryophyllene (7.8%) and carvacrol (6.92%)
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