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Luana Dessbesell Sadra Souzanchi Kasanneni Tirumala Venkateswara Rao Alejandro Alarcon Carrillo Devon Bekker Kristen Amanda Hall Katherine Mary Lawrence Carolyn Lindsay Judge Tait Chunbao Xu 《Biofuels, Bioproducts and Biorefining》2019,13(5):1234-1245
This paper presents a techno‐economic analysis of a low‐cost and high‐efficiency technology for the production of 2,5‐furandicarboxylic acid (FDCA) from starch, glucose, or high‐fructose corn syrup (HFCS). With the design presented here, it is viable to convert starch to glucose through enzymatic hydrolysis followed by catalytic dehydration of glucose with niobium phosphate, an innovative low‐cost catalyst, to produce 5‐hydroxymethyl furfural (HMF). The HMF produced is then converted into FDCA via air oxidation over a cobalt‐manganese mixed oxide catalyst. Three variations of this design are assessed: Scenario 1 starts with starch, and Scenarios 2 and 3 start directly with glucose or HFCS, without the initial starch hydrolysis step. The minimum selling price (MSP) and discounted payback period (PBP) were calculated to investigate the feasibility of the scenarios. A sensitivity analysis was also performed for the key cost drivers, selling price of FDCA, and spent catalysts. All scenarios were feasible; however, the HFCS to FDCA process was the most profitable (MSP 1802 US$/t and a PBP below 5 years). Above all, the feasibility of this technology is mostly affected by variations in recovered catalysts and FDCA selling prices. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd. 相似文献
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Luana Perioli Andrea Dorigato Cinzia Pagano Matteo Leoni Alessandro Pegoretti 《Polymer Engineering and Science》2019,59(Z1):E112-E119
Composite films based on sodium carboxymethyl cellulose (Na‐CMC) loaded with a ZnAl(OH)2CO3·yH2O hydrotalcite (ZnAl‐HTlc), were developed and characterized. The composites were mechanically more stable than the matrix alone: the noticeable enhancement of elastic modulus, creep resistance and failure properties, all proportional to the filler content, came at the expenses of a certain embrittlement. The filler tended to aggregate in the composites and the size of the aggregates increased with ZnAl‐HTlc amount. Contact angle measurements highlighted how ZnAl‐HTlc introduction in the polymeric matrix could strongly modify the wettability conditions of the films increasing their hydrophilicity. Bioadhesion tests showed that the adhesion behavior of the composites decreased as ZnAl‐HTlc amount increases, testifying the influence of the filler on the ability of the film to bind skin surface. Therefore, the developed films may find application as active wound dressings since ZnAl‐HTlc can be easily intercalated with an active pharmaceutical ingredient to be progressively released on the wound. POLYM. ENG. SCI., 59:E112–E119, 2019. © 2018 Society of Plastics Engineers 相似文献
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Ricardo P. Santos Luana M. Souza Acenini L. Balieiro Cleide M. F. Soares Álvaro S. Lima 《分离科学与技术》2018,53(5):734-744
This research present an integrated process for the extraction and purification of betanin from fruit of Opuntia ficus-indica. The extraction process was evaluated using different solvents (water, acetonitrile, ethanol and tetrahydrofuran), and then integrated into the purification process using aqueous two-phase systems (ATPS). The optimum conditions for extraction was with THF and the purification conditions determined to be 43 wt% of THF and 6 wt% of sodium citrate buffer (pH 5.5) at 25°C. A purification factor of 13.7 ± 0.5 fold, with a partition coefficient of betanin for salt-rich phase and the antioxidant capacity was increased ≈ 65%. 相似文献
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J. Scott Crowe Kevin J. Roberts Timothy M. Carlton Luana Maggiore Marion F. Cubitt Keith P. Ray 《Drug development and industrial pharmacy》2019,45(3):387-394
Objective: V565 is a novel oral anti-tumor necrosis factor (TNF)-α domain antibody being developed for topical treatment of inflammatory bowel disease (IBD) patients. Protein engineering rendered the molecule resistant to intestinal proteases. Here we investigate the formulation of V565 required to provide gastro-protection and enable optimal delivery to the lower intestinal tract in monkeys.
Methods: Enteric-coated V565 mini-tablets were prepared and dissolution characteristics tested in vitro. Oral dosing of monkeys with enteric-coated mini-tablets containing V565 and methylene blue dye enabled in vivo localization of mini-tablet dissolution. V565 distribution in luminal contents and feces was measured by enzyme-linked immunosorbent assay (ELISA). To mimic transit across the damaged intestinal epithelium seen in IBD patients an intravenous (i.v.) bolus of V565 was given to monkeys and pharmacokinetic parameters of V565 measured in serum and urine by ELISA.
Results: Enteric-coated mini-tablets resisted dissolution in 0.1?M HCl, before dissolving in a sustained release fashion at neutral pH. In orally dosed monkeys methylene blue intestinal staining indicated the jejunum and ileum as sites for mini-tablet dissolution. Measurements of V565 in monkey feces confirmed V565 survival through the intestinal tract. Systemic exposure after oral dosing was very low consistent with limited V565 mucosal penetration in healthy monkeys. The rapid clearance of V565 after i.v. dosing was consistent with renal excretion as the primary route for elimination of any V565 reaching the circulation.
Conclusions: These results suggest that mini-tablets with a 24% Eudragit enteric coating are suitable for targeted release of orally delivered V565 in the intestine for topical treatment of IBD. 相似文献
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Gianluigi Zanusso Elisa Colaizzo Anna Poleggi Carlo Masullo Raffaello Romeo Sergio Ferrari Matilde Bongianni Michele Fiorini Dorina Tiple Luana Vaianella Marco Sbriccoli Flavia Porreca Michele Equestre Maurizio Pocchiari Franco Cardone Anna Ladogana 《International journal of molecular sciences》2022,23(18)
Genetic Creutzfeldt–Jakob disease (gCJD) associated with the V180I mutation in the prion protein (PrP) gene (PRNP) in phase with residue 129M is the most frequent cause of gCJD in East Asia, whereas it is quite uncommon in Caucasians. We report on a gCJD patient with the rare V180I-129V haplotype, showing an unusually long duration of the disease and a characteristic pathological PrP (PrPSc) glycotype. Family members carrying the mutation were fully asymptomatic, as commonly observed with this mutation. Neuropathological examination showed a lesion pattern corresponding to that commonly reported in Japanese V180I cases with vacuolization and gliosis of the cerebral cortexes, olfactory areas, hippocampus and amygdala. PrP was deposited with a punctate, synaptic-like pattern in the cerebral cortex, amygdala and olfactory tract. Western blot analyses of proteinase-K-resistant PrP showed the characteristic two-banding pattern of V180I gCJD, composed of mono- and un-glycosylated isoforms. In line with reports on other V180I cases in the literature, Real-Time Quaking Induced Conversion (RT-QuIC) analyses did not demonstrate the presence of seeding activity in the cerebrospinal fluid and olfactory mucosa, suggesting that this haplotype also may result in a reduced seeding efficiency of the pathological PrP. Further studies are required to understand the origin, penetrance, disease phenotype and transmissibility of 180I-129V haplotype in Caucasians. 相似文献
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