2021 ◽  
pp. 42-49
A.A. Heydarov ◽  
Ch.M. Kashkai ◽  

The present work is continuation of our investigations on heap leaching, suggested for the first time. Various variants of alkaline leaching of alunite from alunite ore without preliminary roasting have been studied. In present work the parameters of heap and tank alkaline leaching of alunite ore have been determined. The proposed methods can also be used to extract aluminum from poor alunite rocks. At alunite was washed 17 times with 3% NaOH solution, the degree of weight loss was 30.65%, while with 14 times washing with 10% alkali solution, the weight loss was 47.82 %. The results obtained are also typical for percolation leaching. An increase in alkali concentration and temperature intensifies the leaching process. At a ratio of solid and liquid phases of 1:5, a stirring speed of – 700 cycles/min, and an alkali concentration of 110.9 g/l, at 800C within 60 minutes’ alunite dissolves up to 96% and goes into solution with accompanying components

2017 ◽  
Vol 4 (1) ◽  
pp. 10
Muhammad Arsyad ◽  
Abdul Salam

Abstract—The goals of this study was to determine the effect of alkali concentration in the soaking coconut coir fiber (S2K) to changes in coconut fiber diameter. Stages of implementation of the study are (1) the measurement of the diameter of S2K before soaking, (2) immersion S2K in an alkali solution (NaOH) at a concentration of 5%, 10%, 15%, 20%, and 25% for 3 and 5 hours, ( 3) after being soaked, S2K removed and rinsed with distilled water, (4) was dried in a room temperature of 30±2°C for 5 days, (5) the measurement of the diameter of S2K after soaking with digital microscope. Based on the results of tests performed concluded that (1) immersion in an alkali solution resulted in a reduction of the diameter of S2K, (2) on soaking 5 hours at a concentration of 15% NaOH solution obtained reduction diameter S2K largest percentage of 56.08%. Keywords: natural fibers, the concentration of alkali, wettability.

2012 ◽  
Vol 81 (3) ◽  
pp. 263-267 ◽  
Metin Guldas ◽  
Canan Hecer

Effects of seven different solutions prepared from various additives (carrageenan, konjac flour, phosphate, yeast extract, xanthan gum and maltodextrin) were used to test for the first time in the marination of experimental seafood. The additives were added into the marination solutions and the samples were analyzed before and after marination. Statistically, the experimental solutions did not cause significant changes in pH, acidity and salt content of the samples (P < 0.05). The highest weight gains were obtained from the solution which contained 0.1% of konjac flour (E425 I) as 4.01, 5.21, 4.61 and 4.88 % in the mussels, big squids, diced squids and small squids, respectively. However, this solution was not preferred by the panellists because of its sticky texture. Inversely to red meat products, the solution containing phosphate caused weight loss during marination. The results indicate that the solution containing 0.2% carrageenan LM (low methoxyl) was the best solution in the marination process. Dipping into this solution caused weight gains of 4.69, 2.98, 4.04 and 2.78% in the big squids, the mussels, the small squids and the diced squids, respectively (P < 0.01). The organoleptic properties (mouth feel, flavour and softness) of mussels and squids were also improved by carrageenan LM addition.

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0253817
Wasiq Khan ◽  
Sundus Alusi ◽  
Hissam Tawfik ◽  
Abir Hussain

Weight-loss is an integral part of Huntington’s disease (HD) that can start before the onset of motor symptoms. Investigating the underlying pathological processes may help in the understanding of this devastating disease as well as contribute to its management. However, the complex behavior and associations of multiple biological factors is impractical to be interpreted by the conventional statistics or human experts. For the first time, we combine a clinical dataset, expert knowledge and machine intelligence to model the multi-dimensional associations between the potentially relevant factors and weight-loss activity in HD, specifically at the premanifest stage. The HD dataset is standardized and transformed into required knowledge base with the help of clinical HD experts, which is then processed by the class rule mining and self-organising maps to identify the significant associations. Statistical results and experts’ report indicate a strong association between severe weight-loss in HD at the premanifest stage and measures of certain cognitive, psychiatric functional ability factors. These results suggest that the mechanism underlying weight-loss in HD is, at least partly related to dysfunction of certain areas of the brain, a finding that may have not been apparent otherwise. These associations will aid the understanding of the pathophysiology of the disease and its progression and may in turn help in HD treatment trials.

2019 ◽  
Vol 87 ◽  
pp. 798-804 ◽  
Xiaobin Li ◽  
Hongyang Wang ◽  
Qiusheng Zhou ◽  
Tiangui Qi ◽  
Guihua Liu ◽  

2013 ◽  
Vol 815 ◽  
pp. 574-578
Xiao Zhen Liu ◽  
Yu Zhen Li ◽  
Ling Ling Song ◽  
Xiao Dong Yu ◽  
Wei Ting Lu

TiB2and Gd2O3were used as codeposited particles for the first time in preparing Ni-TiB2-Gd2O3composite coatings to improve its performance. Ni-TiB2-Gd2O3composite coatings were prepared by electrodeposition method from a nickel cetyltrimethylammonium bromide and hexadecylpyridinium bromide solution containing TiB2and Gd2O3particles. The content of codeposited TiB2and Gd2O3in the composite coatings was controlled by the addition of different TiB2and Gd2O3particles concentrations in the solution, respectively. The effects of TiB2and Gd2O3content on microhardness, wear weight loss, and friction coefficient of composite coatings were investigated, respectively. Ni-TiB2-Gd2O3composite coatings shows higher microhardness and lower wear weight loss, friction coefficient than those of the pure Ni coating and Ni-TiB2composite coatings. The wear weight loss of Ni-TiB2-Gd2O3composite coatings is lower 9.13 and 1.59 times than that of the pure Ni coating and Ni-TiB2composite coatings, respectively. The friction coefficients of pure Ni coating, Ni-TiB2and Ni-TiB2-Gd2O3composite coatings are 0.723, 0.815 and 0.43, respectively. Ni-TiB2-Gd2O3composite coatings shows the least friction coefficient among the three coatings. Gd2O3particles in composite coatings serves as solid lubricant between contact surfaces, decreases the friction coefficient, abates the wear and increases the corrosion resistance of the composite coatings. The loading-bearing capacity and the wear-reducing effect of the Gd2O3particles in the composite coatings are closely related to the content of Gd2O3particles in the composite coatings.

2020 ◽  
Vol 48 (01) ◽  
pp. 50-55
Stefanie A. Barth ◽  
Christian Menge ◽  
Doris Hillemann ◽  
Alexander Lauda ◽  
Stephan Pfleghaar

AbstractA 9-month old pet ferret was presented to a veterinarian with symptoms of weight loss, apathy, and hyporexia. Explorative laparotomy identified a firm mass of approximately 2 × 2 × 2 cm in size in the mesentery of the jejunum. Because of the poor general condition and the unfavorable prognosis, the ferret was euthanized during surgery. The mass was resected in total and submitted to histological examination which revealed a granulomatous and necrotizing lymphadenitis. Acid fast bacteria were detected by Fite-Faraco staining leading to the suspicion of an infection with Mycobacteria sp. PCR confirmed presence of DNA of members of the Mycobacterium tuberculosis complex, subsequently specified as M. bovis. The detected spoligotype SB2548 was described for the first time. Ferrets are presented to veterinarians with increasing frequency because of their growing popularity as pet animals. Since these animals are highly susceptible to mycobacterial infections, mycobacteriosis and especially zoonotic relevant tuberculosis should be considered as differential diagnosis.

2019 ◽  
Vol 40 (26) ◽  
pp. 2131-2138 ◽  
Shabbar Jamaly ◽  
Lena Carlsson ◽  
Markku Peltonen ◽  
Peter Jacobson ◽  
Kristjan Karason

Abstract Aims Obesity is associated with increased risk for heart failure. We analysed data from the Swedish Obese Subjects (SOS) study, a prospective matched cohort study, to investigate whether bariatric surgery reduces this risk. Methods and results From the total SOS population (n = 4047), we identified 4033 obese individuals with no history of heart failure at baseline, of whom 2003 underwent bariatric surgery (surgery group) and 2030 received usual care (control group). First-time principal diagnoses of heart failure were identified by crosschecking the SOS database with the Swedish National Patient Register and the Swedish Cause of Death Register using diagnosis codes. During a median follow-up of 22 years, first-time heart failure occurred in 188 of the participants treated with surgery and in 266 of those receiving usual care. The risk of developing heart failure was lower in the surgery group than in the control group [sub-hazard ratio 0.65, 95% confidence interval (CI) 0.54–0.79; P < 0.001]. After pooling data from the two study groups, the quartile of subjects with the largest weight loss after 1 year (mean −41 kg) displayed the greatest risk reduction (sub-hazard ratio 0.51, 95% CI 0.30–0.70; P < 0.001). This association remained statistically significant after adjustment for surgical intervention and potential baseline confounders (sub-hazard ratio 0.60, 95% CI 0.36–0.97; P = 0.038). Conclusion Compared with usual care, bariatric surgery was associated with reduced risk of heart failure among persons being treated for obesity. The risk of heart failure appeared to decline in parallel with a greater degree of weight loss. Identifier NCT01479452.

2013 ◽  
Vol 726-731 ◽  
pp. 1544-1547
Wei De Lu ◽  
Zhan Qing Ma ◽  
Jun Feng Rao

In this study, the high performance ion chromatography integrated pulsed amperometric detection (HPIC-IPAD) was appliedfor the first time to detect 10 sulfonamides. In this experiment,we used Dionex AS18 (250mm×2mm) and AG18 (50mm×2mm) columnsfilled with an anion exchange resin, with 14 mmol / L NaOH solution concentration. The Analysis temperature was 30 ° C, the flow rate was 0.25 mL / min, and the injection volume was 10 μL. The detection was through pulsed amperometric detection cell with Au electrode and reference electrode pH-Ag/AgCl as working electrodes. Take the standard stock solution compounding 0.06,0.15,0.30,1.5,3.0 mg / L standard solutions respectively,build linear regression on chromatographic peak area as Y and analyte mass concentration of as X (mg / L). In the range of 0.06-3.0 mg / L, the 10 sulfonamides response appeared a linear relationship (R> 0.9989). This method can be considered for the detection of trace sulfonamides substances in cosmetics, food, and feed.

2016 ◽  
Vol 27 (2) ◽  
pp. 277-287 ◽  
Alan A. Saber ◽  
Saeed Shoar ◽  
Mahmoud W. Almadani ◽  
Natan Zundel ◽  
Mohammed J. Alkuwari ◽  

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