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Additive neurorestorative effects of exercise and docosahexaenoic acid intake in a mouse model of Parkinson’s disease
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作者 Olivier Kerdiles Méryl-Farelle Oye Mintsa Mi-mba +8 位作者 Katherine Coulombe Cyntia Tremblay VincentÉmond Martine Saint-Pierre Clémence Rouxel Line Berthiaume Pierre Julien Francesca Cicchetti Frédéric Calon 《Neural Regeneration Research》 SCIE CAS 2025年第2期574-586,共13页
There is a need to develop interventions to slow or reverse the degeneration of dopamine neurons in Parkinson’s disease after diagnosis.Given that preclinical and clinical studies suggest benefits of dietary n-3 poly... There is a need to develop interventions to slow or reverse the degeneration of dopamine neurons in Parkinson’s disease after diagnosis.Given that preclinical and clinical studies suggest benefits of dietary n-3 polyunsaturated fatty acids,such as docosahexaenoic acid,and exercise in Parkinson’s disease,we investigated whether both could synergistically interact to induce recovery of the dopaminergic pathway.First,mice received a unilateral stereotactic injection of 6-hydroxydopamine into the striatum to establish an animal model of nigrostriatal denervation.Four weeks after lesion,animals were fed a docosahexaenoic acid-enriched or a control diet for the next 8 weeks.During this period,the animals had access to a running wheel,which they could use or not.Docosahexaenoic acid treatment,voluntary exercise,or the combination of both had no effect on(i)distance traveled in the open field test,(ii)the percentage of contraversive rotations in the apomorphine-induction test or(iii)the number of tyrosine-hydroxylase-positive cells in the substantia nigra pars compacta.However,the docosahexaenoic acid diet increased the number of tyrosine-hydroxylase-positive terminals and induced a rise in dopamine concentrations in the lesioned striatum.Compared to docosahexaenoic acid treatment or exercise alone,the combination of docosahexaenoic acid and exercise(i)improved forelimb balance in the stepping test,(ii)decreased the striatal DOPAC/dopamine ratio and(iii)led to increased dopamine transporter levels in the lesioned striatum.The present results suggest that the combination of exercise and docosahexaenoic acid may act synergistically in the striatum of mice with a unilateral lesion of the dopaminergic system and provide support for clinical trials combining nutrition and physical exercise in the treatment of Parkinson’s disease. 展开更多
关键词 6-HYDROXYDOPAMINE DOPAMINE dopamine transporter EXERCIsE neurorestoration Parkinson’s disease polyunsaturated fatty acids omega-3
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Study and Commercial Test on Technology for Deacidification of Distillate Oils 被引量:1
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作者 Tang Xiaodong An Rong +1 位作者 Cui Yingxian Du Hongyong 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2005年第3期19-25,共7页
A new kind of solvent for deacidification of distillate oils was introduced in this paper. After successful laboratory study this technology had been applied in commercial scale successfully. Compared to traditional c... A new kind of solvent for deacidification of distillate oils was introduced in this paper. After successful laboratory study this technology had been applied in commercial scale successfully. Compared to traditional caustic wash of distillate oils, this technology has a lot of merits, such as the broad range of distillates to be processed, low caustic consumption, recycle of deacidifying agent, absence of waste caustic discharge, and low equipment revamp expenses, which can have promising perspectives for exploitation and application of this technology. 展开更多
关键词 distillate oil deacidifying agent petroleum acids purification process experimental study commercial application
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Optimization of Wax Esters Production from Palm Fatty Acid Distillate and Oleyl Alcohol over Amberlyst 15 被引量:1
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作者 M. Tapanwong V. Punsuvon 《Journal of Environmental Science and Engineering》 2011年第11期1427-1434,共8页
Wax esters were derived from long chain fatty acids and long chain alcohols with chain length of 12 carbons or more. These compounds have many potential applications in cosmetics, pharmaceuticals and food industries. ... Wax esters were derived from long chain fatty acids and long chain alcohols with chain length of 12 carbons or more. These compounds have many potential applications in cosmetics, pharmaceuticals and food industries. The present work focuses on the synthesis of wax esters using palm fatty acid distillate and oleyl alcohol catalyzed by Amberlyst 15. Response surface methodology (RSM) based on a five-level, three-variable central composite design (CCD) was used to evaluate the interactive effects of synthesis, of amount of Amberlyst 15 catalyst (21.6-38.4% w/w), reaction time (18-102 min) and molar ratio (palm fatty acid distillate to oleyl alcohol, 1:1.16-1:2.84) on the percentage conversion of palm fatty acid distillate. The optimum conditions derived via RSM were: amount of catalyst 33% w/w, reaction time 95 minute and palm fatty acid to oleyl alcohol molar ratio 1:2.7. The actual experimental conversion was 81.52% under optimum condition, which compared well to the maximum predicted value of 80.50%. Analysis of the yield showed that at optimum condition, 80.54% wax esters were produced. 展开更多
关键词 Palm fatty acid distillate wax esters response surface methodology esterification.
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Influences of operating conditions on biocatalytic activity and reusability of Novozym 435 for esterification of free fatty acids with short-chain alcohols:A case study of palm fatty acid distillate 被引量:1
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作者 Sawittree Mulalee Pongrumpa Srisuwan Muenduen Phisalaphong 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第11期1851-1856,共6页
In the present study, the effects of operating conditions on biocatalytic activity and stability of Novozym 435 for repeated-batch biodiesel production from free fatty acid (FFA) were investigated. Thermal deactivat... In the present study, the effects of operating conditions on biocatalytic activity and stability of Novozym 435 for repeated-batch biodiesel production from free fatty acid (FFA) were investigated. Thermal deactivation caused by increased operating temperature from 45 to 50 ℃ could seriously affect the reusability of Novozym 435. The deactivation of Novozym 435 during the esterification of oleic acid with ethanol tended to be stronger than that in the system with methanol. Under the optimal conditions, considering both biocatalytic activity and stability of the enzyme, Novozym 435 could be reused for 13 cycles for biodiesel productions from oleic acid and absolute alcohols (methanol and ethanol) with FFA conversions of at least 90%. The presence of 4%-5% water in ethanol significantly affected the reusability of Novozym 435. Changes in the surface morphology of Novozym 435 during the esterification with various conditions were observed. It was revealed that the reduction in catalytic activity was related to the swelling degree of the catalyst surface, Additionally, biodiesel production from low cost renewable feedstocks, such as palm fatty acid distillate (PFAD) and 95% ethanol was examined, The esterification of PFAD with 95% ethanol catalyzed by Novozym 435 in 10-repeated batch operation showed the similar results in FFA conversion as compared to those using oleic acid. Novozym 435 remained active and could maintain 97.6% of its initial conversion after being used for 10 hatches. 展开更多
关键词 Biodiesel Oleic acid Novozym 435Reusability Palm fatty acid distillate
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ANALYSIS OF PETROLEUM ACIDS IN DUSHANZI DISTILLATE
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作者 Jian ZHOU Jia Lin TAO 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第5期439-440,共2页
A method which involves conversion of carboxylic acids to corresponding hydrocarbons and determination of high-resoiution mass spectrometry has been applied to the analysis of petroleum acids in Dushanzi distillate an... A method which involves conversion of carboxylic acids to corresponding hydrocarbons and determination of high-resoiution mass spectrometry has been applied to the analysis of petroleum acids in Dushanzi distillate and resulted in compound class identification of petroleum acids which have not been reported previously in Xinjiang petroleum. 展开更多
关键词 ANALYsIs OF PETROLEUM acids IN DUsHANZI distillate
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Production of biodiesel from palm fatty acid distillate using sulfonated-glucose solid acid catalyst:Characterization and optimization
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作者 Ibrahim M.Lokman Umer Rashid Yun Hin Taufiq-Yap 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第11期1857-1864,共8页
A palm fatty acid distillate (PFAD) has been used for biodiesel production. An efficient sulfonated-glucose acid catalyst (SGAC) was prepared by sulfonation to catalyze the esterification reaction. The effect of t... A palm fatty acid distillate (PFAD) has been used for biodiesel production. An efficient sulfonated-glucose acid catalyst (SGAC) was prepared by sulfonation to catalyze the esterification reaction. The effect of three variables i.e. methanol-to-PFAD molar ratio, catalyst amount and reaction time, on the yield of PFAD esters was studied by the response surface methodology (RSM). The optimum reaction conditions were: 12.2:1 methanol-to- PFAD molar ratio, 2.9% catalyst concentration and 134 rain of time as predicted by the RSM. The reaction under the optimum conditions resulted in 94.5% of the free fatty acid (FFA) conversion with 92.4% of the FAME yield. The properties of the PFAD esters were determined according to biodiesel standards. 展开更多
关键词 Palm fatty acid distillate (PFAD)5ulfonated-glucose solid acid catalystEsterificationOptimizationPFAD methyl ester
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Optimizing Vitamin E Purification from Unsaponiable Matter of Palm Fatty Acids Distillate by Low Temperature Solvent Crystallization
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作者 Kgs Ahmadi Sri Kumalaningsih +1 位作者 Susinggsih Wijana Imam Santoso 《Journal of Food Science and Engineering》 2012年第10期557-563,共7页
Palm fatty acid distillate (PFAD), a by-product of deodorization in palm oil refining, contains about 0.7%-1% vitamin E. The advantage of PFAD over other vitamin E sources is higher amount of tocotrienols than that ... Palm fatty acid distillate (PFAD), a by-product of deodorization in palm oil refining, contains about 0.7%-1% vitamin E. The advantage of PFAD over other vitamin E sources is higher amount of tocotrienols than that of tocopherols. Vitamin E purification of unsaponiable matter of PFAD was aimed to remove other impurities to obtain high vitamin E concentration, mainly tocotrienols. This research used low temperature solvent crystallization to purify vitamin E. To optimize response of vitamin concentration, a response surface method was applied with three factors, i.e., the ratio between solvent and unsaponifiable matter (A), crystallization temperature (B), and crystallization time (C). The relation of three factors was quadratic with equation Y = -128.54361 + 41.33904A - 0.87995B + 1.58941C + 0.00290AB - 0.044324AC + 0.00120BC - 3.33113A2 - 0.039535B2 - 0.02710C2. The optimum crystallization condition was obtained at ratio of solventto unsaponifiable matter of 6.04:1, crystallization temperature of-10.54 ℃, and crystallization time of 24.16 hours. Vitamin E enriched fraction from optimum crystallization conditions contained vitamin E of 20.13% (w/w). 展开更多
关键词 Low tempareture solvent crystallization palm fatty acid distillate vitamin E enriched fraction unsaponifiable matter.
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STUDY ON CONCENTRATING SULFURIC ACID SOLUTION BY VACUUM MEMBRANE DISTILLATION 被引量:16
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作者 Zhang Guiqing Zhang Qixiu Zhou Kanggen (Department of Metallurgical Science and Engineering, Central South University of Technology, Changsha 410083, China) 《Journal of Central South University》 SCIE EI CAS 1999年第2期99-102,共4页
Concentrating sulfuric acid solution by vacuum membrane distillation with flat PEFE membrane is explored. The effects of sulfuric acid concentration, temperature of the feed, the vacuum degree of the vacuum side on th... Concentrating sulfuric acid solution by vacuum membrane distillation with flat PEFE membrane is explored. The effects of sulfuric acid concentration, temperature of the feed, the vacuum degree of the vacuum side on the flux of membrane distillation and the separation efficiency of acid are investigated. The results illustrate that the flux of the membrane distillation increases with the rise of feed temperature and the vacuum degree of the vacuum side, but it decreases with the rise of the sulfuric acid concentration of the feed. The separation efficiency of acid is correlated with the flux of membrane distillation; the separation efficiency of the acid can amount to 100% in the process, when operative conditions are properly controlled. It can also been obtained from the experiment that, compared with other methods of membrane distillation, the vacuum membrane distillation can obtain greater distillation flux. 展开更多
关键词 MEMBRANE distilLATION sulfuric acid VACUUM
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Milk fat globule membrane supplementation protects againstβ-lactoglobul-ininduced food allergy in mice via upregulation of regulatory T cells and enhancement of intestinal barrier in a microbiota-derived short-chain fatty acids manner 被引量:1
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作者 Han Gong Tiange Li +3 位作者 Dong Liang Jingxin Gao Xiaohan Liu Xueying Mao 《Food Science and Human Wellness》 SCIE CSCD 2024年第1期124-136,共13页
Milk fat globule membrane(MFGM),which contains abundant glycoproteins and phospholipids,exerts beneficial effects on intestinal health and immunomodulation.The aim of this study was to evaluate the protective effects ... Milk fat globule membrane(MFGM),which contains abundant glycoproteins and phospholipids,exerts beneficial effects on intestinal health and immunomodulation.The aim of this study was to evaluate the protective effects and possible underlying mechanisms of MFGM on cow’s milk allergy(CMA)in aβ-lactoglobulin(BLG)-induced allergic mice model.MFGM was supplemented to allergic mice induced by BLG at a dose of 400 mg/kg body weight.Results demonstrated that MFGM alleviated food allergy symptoms,decreased serum levels of lipopolysaccharide,pro-inflammatory cytokines,immunoglobulin(Ig)E,Ig G1,and Th2 cytokines including interleukin(IL)-4,while increased serum levels of Th1 cytokines including interferon-γand regulatory T cells(Tregs)cytokines including IL-10 and transforming growth factor-β.MFGM modulated gut microbiota and enhanced intestinal barrier of BLG-allergic mice,as evidenced by decreased relative abundance of Desulfobacterota,Rikenellaceae,Lachnospiraceae,and Desulfovibrionaceae,while increased relative abundance of Bacteroidetes,Lactobacillaceae and Muribaculaceae,and enhanced expressions of tight junction proteins including Occludin,Claudin-1 and zonula occludens-1.Furthermore,MFGM increased fecal short-chain fatty acids(SCFAs)levels,which elevated G protein-coupled receptor(GPR)43 and GPR109A expressions.The increased expressions of GPR43 and GPR109A induced CD103+dendritic cells accumulation and promoted Tregs differentiation in mesenteric lymph node to a certain extent.In summary,MFGM alleviated CMA in a BLG-induced allergic mice model through enhancing intestinal barrier and promoting Tregs differentiation,which may be correlated with SCFAs-mediated activation of GPRs.These findings suggest that MFGM may be useful as a promising functional ingredient against CMA. 展开更多
关键词 Cow’s milk allergy Milk fat globule membrane Gut microbiota short-chain fatty acid G protein-coupled receptor Regulatory T cell
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Changes of Petroleum Acid Distribution Characterized by FT-ICR MS in Heavy Acidic Crude Oil after True Boiling Point Distillation 被引量:8
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作者 Liu Yingrong Zhang Qundan +3 位作者 Wang Wei Liu Zelong Zhu Xinyi Tian Songbai 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2014年第1期8-12,共5页
The molecular transformations of carboxylic acids in heavy acidic SL crude before and after true boiling point distillation were examined by ultra-high resolution negative-ion electrospray ionization(ESI) Fourier tran... The molecular transformations of carboxylic acids in heavy acidic SL crude before and after true boiling point distillation were examined by ultra-high resolution negative-ion electrospray ionization(ESI) Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR MS). The acid class(heteroatom number), type(z numbers) and carbon number distributions were positively characterized. It was found out that the total acid number(TAN) of SL crude decreased after true boiling point distillation, and the abundance of O2 class in mass spectra was also found to be reduced from 67.6% to 34.5% in SL TBP mixed crude as measured by MS spectra, indicating to a potential carboxylic acid decomposition. However, it was interesting that the carboxylic acids type distribution in both oils was almost the same although their relative abundance in SL TBP mixed crude turned to be much lower, suggesting that various petroleum carboxylic acid types have the similar thermal decomposition reaction behavior. Furthermore, for each O2 type of acids in SL TBP mixed crude, the abundance of carboxylic acids with carbon number higher than 35 was reduced greatly, especially for those with carbon number higher than 60, the mass peaks of which were nearly totally removed, indicating that the large carboxylic acid molecules in heavy fractions decomposed more significantly because of longer heating time during the true boiling point distillation process. As a result, the reduction of TAN may be caused by the thermal decomposition of carboxylic acids especially those with high carbon number, suggesting that quick distillation or much lower pressure is required to avoid the thermal decomposition. 展开更多
关键词 true boiling point distillation carboxylic acid EsI FT-ICR Ms acidic crude total acid number(TAN)
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Hydrochloric acid recovery from rare earth chloride solutions by vacuum membrane distillation 被引量:7
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作者 TANG Jianjun ZHOU Kanggen 《Rare Metals》 SCIE EI CAS CSCD 2006年第3期287-292,共6页
The possibility of the recovery of hydrochloric acid from rare earth (RE) chloride solutions was first experimentally studied by batch vacuum membrane distillation (VMD). The recovery by continuous VMD was also st... The possibility of the recovery of hydrochloric acid from rare earth (RE) chloride solutions was first experimentally studied by batch vacuum membrane distillation (VMD). The recovery by continuous VMD was also studied to devise methods that enabled the operation of VMD setup in a stable condition as well as to increase the membrane-operating life The results indicated that HCl separation with RE by VMD was possible, and the recovery ratio of 80% could be achieved by batch VMD. In continuous VMD, when the temperature of circular solutions, circular rate, and downstream pressure was 62-63℃, 5.4 cm/s, and 9.33 kPa, respectively, the HCl concentration in circular solutions and the processing capacity per membrane area were obtained. The mathematical results were in accordance with the experimental ones. 展开更多
关键词 membrane separation hydrochloric acid recovery vacuum membrane distillation rare earth mathematical stimulation
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Purification of Lactic Acid by Heterogeneous Catalytic Distillation Using Ion-exchange Resins 被引量:9
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作者 马利 张阳 杨基础 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2005年第1期24-31,共8页
The purification of lactic acid based on the esterification of raw lactic acid from fermentation broth and then the catalytic distillation hydrolysis of methyl lactate simultaneously to achieve pure lactic acid is rep... The purification of lactic acid based on the esterification of raw lactic acid from fermentation broth and then the catalytic distillation hydrolysis of methyl lactate simultaneously to achieve pure lactic acid is reported. The esterification kinetics of lactic acid with methanol catalyzed by strong-acid cation-exchange resins (Amberlyst-15,D001, D002, NKC, 002) was studied under the condition that simulates the real catalytic environment. Experimental results were correlated by a Langmuir-Hinselwood model and the nonideality of the solution was taken into account by using activities calculated by the universal quasichemical functional group activity coefficient (UNIFAC) method.A good agreement between the model and the experimental data was achieved. Continuous purification experiments were conducted to find the optimum column configuration and operation condition for the system. The effects of various parameters, e.g. the length of different section of the column, feed rate and ratio of reactants, packing material and catalyst type, were studied. This novel system shows good separation results in lab scale, and is potential for industrial application. 展开更多
关键词 lactic acid catalytic distillation PURIFICATION ion-exchange resin HYDROLYsIs
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Behaviour of Tributylamine as Entrainer for the Separation of Water and Acetic Acid with Reactive Extractive Distillation 被引量:8
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作者 雷志刚 李成岳 陈标华 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2003年第5期515-519,共5页
A new separation method, reactive extractive distillation, was put forward for separating water and acetic acid. The separation mechanism was analyzed through infrared spectra technique. Isobaric vapor-liquid equilibr... A new separation method, reactive extractive distillation, was put forward for separating water and acetic acid. The separation mechanism was analyzed through infrared spectra technique. Isobaric vapor-liquid equilibrium (VLE) data at 101.33 kPa for the binary or ternary systems consisting of water, acetic acid and tributylamine were measured. The activity coefficients were correlated by using Wilson, NRTL, and UNIQUAC Equations.The VLE experiment showed that tributylamine could enhance the relative volatility of water to acetic acid. An extractive distillation experiment was carried out and proved that tributylamine was a good extractive solvent. 展开更多
关键词 reactive extractive distillation vapor-liquid equilibrium WATER acetic acid tributylamine
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Hydrochloric Acid Recovery from Rare Earth Chloride Solutions by Vacuum Membrane Distillation (1) Study on the Possibility 被引量:3
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作者 唐建军 周康根 +2 位作者 赵方辉 李荣光 张启修 《Journal of Rare Earths》 SCIE EI CAS CSCD 2003年第S1期78-82,共5页
The equilibrium between the gas-liquid phases of the system of HCl-RECl_3-H_2O was analyzed,and the possibility of hydrochloric acid recovery from rare earth chloride solutions by vacuum membrane distillation (VMD) wa... The equilibrium between the gas-liquid phases of the system of HCl-RECl_3-H_2O was analyzed,and the possibility of hydrochloric acid recovery from rare earth chloride solutions by vacuum membrane distillation (VMD) was experimentally studied in the laboratory scale. The results indicate that increasing initial concentrations of both hydrochloric acid and rare earth increase recovery ratio of hydrochloric acid,and recovery ratio of 80% can be achieved. Concentrated multiple of rare earth shows great influence on recovery ratio,leakage ratio of rare earth is less than 2% generally,and pure acid can be acquired in the permeate side. The two factors,namely flux and leakage ratio,which may determine the future use of VMD were also discussed. 展开更多
关键词 vacuum membrane distillation hydrochloric acid rare earths
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Enrichment of Semi-Volatile Organic Acids from Aqueous Solutions by Multiple-Effect Membrane Distillation 被引量:5
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作者 班睿 刘苗苗 +2 位作者 秦英杰 王焕 崔东胜 《Transactions of Tianjin University》 EI CAS 2012年第5期320-329,共10页
Multiple-effect membrane distillation (MEMD) process for enriching semi-volatile organic acids from their individual aqueous solutions was performed by using a hollow fiber-based air gap membrane distillation (AGMD... Multiple-effect membrane distillation (MEMD) process for enriching semi-volatile organic acids from their individual aqueous solutions was performed by using a hollow fiber-based air gap membrane distillation (AGMD) module with the function of internal heat recovery. Aqueous solutions of glyoxylic acid, glycolic acid, lactic acid, pyrnvic acid, malonic acid and glutaric acid were used as model feed. For a feed of 1% (mass fraction), each acid could be enriched for 8--20 times, which depended on the surface tension of the concentrate. The operation performance of MEMD process was characterized by permeation flux J, performance ratio PR and acid rejection rate R. The effects of cold feed-in temperature, heated feed-in temperature, feed-in volumetric flow rate and feed-in concen- tration on MEMD performance were experimentally evaluated. Maximum values of J, PR and R were 4.8 L/(h-m2), 9.84 and 99.93%, respectively. Moreover, MEMD process demonstrated a fairly good stability in a long-term experiment lasting for 30 d when aqueous solution of 4% (mass fraction) lactic acid was used as a feed. 展开更多
关键词 multiple-effect membrane distillation organic acid ENRICHMENT performance ratio sTABILITY
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Amino acid digestibility of heat damaged distillers dried grains with solubles fed to pigs 被引量:2
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作者 Ferdinando Nielsen Almeida John Kyaw Htoo +1 位作者 John Thomson Hans Henrik Stein 《Journal of Animal Science and Biotechnology》 SCIE CAS 2014年第1期88-97,共10页
The primary objective of this experiment was to determine the effects of heat treatment on the standardized ileal digestibility (SID) of amino acids (AA) in corn distillers dried grains with solubles (DDGS) fed ... The primary objective of this experiment was to determine the effects of heat treatment on the standardized ileal digestibility (SID) of amino acids (AA) in corn distillers dried grains with solubles (DDGS) fed to growing pigs. The second objective was to develop regression equations that may be used to predict the concentration of SID AA in corn DDGS. A source of corn DDGS was divided into 4 batches that were either not autoclaved or autoclaved at 130℃ for 10, 20, or 30 min. Four diets containing DDGS from each of the 4 batches were formulated with DDGS being the only source of AA and CP in the diets. A N-free diet also was formulated and used to determine the basal endogenous losses of CP and AA. Ten growing pigs (initial BW: 53.5 + 3.9 kg) were surgically equipped with a T-cannula in the distal ileum and allotted to a replicated 5 x4 Youden square design with 5 diets and 4 periods in each square. The SID of CP decreased linearly (P〈 0.05) from 77.9% in non-autoclaved DDGS to 72.1, 66.1, and 68.5% in the DDGS samples that were autoclaved for 10, 20, or 30 min, respectively. The SID of lysine was quadratically reduced (P〈 0.05) from 66.8% in the non-autoclaved DDGS to 54.9, 55.3, and 51.9% in the DDGS autoclaved for 10, 20, or 30 min, respectively. The concentrations of SID Arginine, Histidine, Leucine, Lysine, Methionine, Phenylalanine, or Threonine may be best predicted by equations that include the concentration of acid detergent insoluble N in the model (r2 = 0.76, 0.68, 0.67, 0.84, 0.76, 0.73, or 0.54, respectively). The concentrations of SID Isoleucine and Valine were predicted (r2 = 0.58 and 0.54, respectively) by the Lysine:CP ratio, whereas the concentration of SID Tryptophan was predicted (r2 = 0.70) by the analyzed concentration of Tryptophan in DDGS. In conclusion, the SID of AA is decreased as a result of heat damage and the concentration of SID AA in heat-damaged DDGS may be predicted by regression equations developed in this experiment. 展开更多
关键词 Amino acids DIGEsTIBILITY distillers dried grains with solubles Heat damage
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Process optimization of an industrial acetic acid dehydration progress via heterogeneous azeotropic distillation 被引量:3
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作者 Xiuhui Huang Zeqiu Li Ying Tian 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第8期1631-1643,共13页
The simulated process model of the HAc dehydration process under actual overloaded condition was conducted by amending the model of standard condition in our previous work using the process data collected from actual ... The simulated process model of the HAc dehydration process under actual overloaded condition was conducted by amending the model of standard condition in our previous work using the process data collected from actual production. Based on the actual process model, the operation optimization analysis of each plant(HAc dehydration column, decanter and NPA recycle column) was conducted using Residue Curve Maps(RCMs),sensitivity analysis and software optimization module. Based on the optimized parameters, the influence of feed impurity MA and the temperature of decanter on the separating effect and energy consumption of the whole process were analyzed. Then the whole process operation optimizing strategy was proposed with the objective that the total reboiler duty Q Total of C-1 and C-3 reaches the minimum value, keeping C-1 and C-3 at their optimized separation parameters obtained above, connecting all the broken recycle and connection streams, and using the temperature of D-1 as operation variable. The optimization result shows that the total reboiler duty Q Total of the whole process can reach the minimum value of 128.32 × 10~6 k J·h^(-1) when the temperature of decanter is 352.35 K, and it can save 5.94 × 10~6 k J·h^(-1), about 2.56 t·h^(-1) low-pressure saturated vapor. 展开更多
关键词 Acetic acid dehydration Azeotropic distillation Process simulation Operation optimization
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STUDY ON CONCENTRATING SULFURIC ACID SOLUTION BY MEMBRANE DISTILLATION WITH METAL - PTFE COMPOSITE MEMBRANE 被引量:1
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作者 Guiqing Zhang Qixiu Zhang +1 位作者 Kanggen Zhou Aiping Luo 《Journal of Central South University》 SCIE EI CAS 1999年第2期95-98,共4页
concentrating sulfuric acid by membrane distillation in a flat sheet direct contact membrane distillation device with a self made metal PTFE composite membrane has been studied. The effect of sulfuric acid concentrati... concentrating sulfuric acid by membrane distillation in a flat sheet direct contact membrane distillation device with a self made metal PTFE composite membrane has been studied. The effect of sulfuric acid concentration of feed, the flowrate and liquor temperature in high temperature side and low temperature side on the flux and separation efficiency is investigated. The stability of this composite membrane is also inspected. The experimental results show that the metal PTFE composite membrane can be used in membrane distillation, and its properties are very stable. It is feasible to concentrate sulfuric acid by membrane distillation with this membrane. 展开更多
关键词 METAL PTFE composite MEMBRANE MEMBRANE distilLATION sulfuric acid
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Application of sparse S transform network with knowledge distillation in seismic attenuation delineation
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作者 Nai-Hao Liu Yu-Xin Zhang +3 位作者 Yang Yang Rong-Chang Liu Jing-Huai Gao Nan Zhang 《Petroleum Science》 SCIE EI CAS CSCD 2024年第4期2345-2355,共11页
Time-frequency analysis is a successfully used tool for analyzing the local features of seismic data.However,it suffers from several inevitable limitations,such as the restricted time-frequency resolution,the difficul... Time-frequency analysis is a successfully used tool for analyzing the local features of seismic data.However,it suffers from several inevitable limitations,such as the restricted time-frequency resolution,the difficulty in selecting parameters,and the low computational efficiency.Inspired by deep learning,we suggest a deep learning-based workflow for seismic time-frequency analysis.The sparse S transform network(SSTNet)is first built to map the relationship between synthetic traces and sparse S transform spectra,which can be easily pre-trained by using synthetic traces and training labels.Next,we introduce knowledge distillation(KD)based transfer learning to re-train SSTNet by using a field data set without training labels,which is named the sparse S transform network with knowledge distillation(KD-SSTNet).In this way,we can effectively calculate the sparse time-frequency spectra of field data and avoid the use of field training labels.To test the availability of the suggested KD-SSTNet,we apply it to field data to estimate seismic attenuation for reservoir characterization and make detailed comparisons with the traditional time-frequency analysis methods. 展开更多
关键词 s transform Deep learning Knowledge distillation Transfer learning seismic attenuation delineation
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Application of Bronsted acid ionic liquids as green catalyst in the synthesis of 2-propanol with reactive distillation 被引量:3
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作者 Jinbei Yang Dongren Cai +4 位作者 Ting Zeng Lihua Zhou Ling Li Ruoyu Hong Ting Qiu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2016年第11期1561-1569,共9页
Five Br?nsted acidic ionic liquids(ILs) were prepared and characterized by FT-IR,~1H NMR and ^(13)C NMR. Their catalytic activities for the synthesis of 2-propanol(IPOH) via transesterification of isopropyl acetate(IP... Five Br?nsted acidic ionic liquids(ILs) were prepared and characterized by FT-IR,~1H NMR and ^(13)C NMR. Their catalytic activities for the synthesis of 2-propanol(IPOH) via transesterification of isopropyl acetate(IPAc) with methanol(Me OH) were investigated. Among all the tested ILs, [Ps-mim]HSO_4 performed best and was used as catalyst for further studies. The reaction kinetics were carried out to correlate the parameters in a homogeneous second order kinetic model. It has been found that there is close agreement between the calculated and experimental values. The high-pressure batch reactive distillation experimental apparatus was set up in order to enhance the conversion of IPAc. A high conversion of IPAc of 99.4% was obtained under the optimal reaction conditions. The catalyst [Ps-mim]HSO_4 can be recycled easily by a rotary evaporator and reused without any further treatment. The catalyst had been repeatedly used for four times and no obvious changes in the structure of catalyst could be observed. 展开更多
关键词 Bronsted acidic ionic liquids 2-Propanol TRANsEsTERIFICATION Homogeneous second order kinetic model Reactive distillation
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