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Optimization of parameters for cerium(Ⅲ) biosorption onto biowaste materials of animal and plant origin using 5-level Box-Behnken design: Equilibrium, kinetic, thermodynamic and regeneration studies

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Journal of Rare Earths 2014年第8期32卷 745-758页

作者： jaya sre varsihini c Devlina Das Nilanjana Das Bioremediation Laboratory Environmental Biotechnology Division School of Biosciences and Technology VIT University

Response surface methodology （RSM） employing 5-level Box-Behnken design was used to optimize the biosorption of cerium（III） onto biowaste materials of animal and plant origin viz. prawn carapace （Pc） and corn style （cS）. Various process parameters viz. pH （A：3.0-9.0）, biomass dosage （B：0.05-0.35 g/L）, initial metal concentration （c：50-350 mg/L）, contact time （D：2-6 h） and temperature （E：20-60 ℃ were chosen for optimization. A log transformation was suggested by the Box-cox plot in the present case. A low p-value of〈0.0001 validated the significance of the model. Maximum ce（III） uptake of 218.3 mg/g for Pc and 180.2 mg/g for cS was noted under optimum conditions. Among the equilibrium isotherms, Freundlich model was found to be the best fitted one suggesting a heterogeneous mode of biosorption on Pc whereas Langmuir model showed the best fit suggesting homogeneous mode of cerium biosorption on cS. This was further confirmed by scanning electron microscopy （SEM）. Kinetic studies showed better applicability of pseudo-first order model suggesting physisorption as phenomena underlying the process. Film-diffusion was suggested by the non-linearity of the Boyd plot. Thermodynamic studies showed that the process was endothermic and spontaneous. FTIR analysis confirmed a major involvement of the participation of amide, amines, ketones and primary alcohol groups during ce（III） biosorption. EDAX analysis confirmed the major participation of carbon group during ce（III） biosorption. This was the first report on parameter optimization of ce（III） biosorption onto biowaste materials using 5-level Box-Behnken experimental design which might be helpful for the recovery of ce（III） from aqueous environment.

关键词： Box-Behnken design biosorption cerium(III) corn style prawn carapace rare earth metals

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Single-center experience with radium-223 in patients with castration-resistant prostate cancer and bone metastases

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Asian Journal of Andrology 2020年第4期22卷 437-438页

作者： Anil Kapoor Nathan c Wong Yuding Wang Som Mukherjee Sebastien Hotte Ian Dayes Himu Lukka Division of Urology Department of SurgeryMcMaster UniversityHamiltonON L8N 4A6U SA Department of Oncology McMaster UniversityHamiltonON L8N 4A6USA.

Dear Editor,Approximately 90%of men with metastatic castration-resistant prostate cancer(mcRPc)have bone metastases that can cause excruciating pain,bone fractures,disability,and death.13 Radium-223 is a radioactive isotope that mimics calcium and emits alpha particle radiation that selectively targets bone metastases.4,5 The results from the Alpharadin in Symptomatic Prostate cancer Patients(ALSYMPcA)study,a phase 3 randomized controlled trial,showed that radium-223 improved overall survival(OS)and time to symptomatic skeletalrelated events(sre)in men with mcRPc and bone metastases compared to placebo.6 Despite the FDA approval,radium-223 appears to be less utilized for the treatment of mcRPc compared to oral agents that target the androgen receptor pathway.

关键词： metastases cancer cancer

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Use of wastes from the tea and coffee industries for the production of cellulases using fungi isolated from the Western Ghats of India

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Systems Microbiology and Biomanufacturing 2021年第1期1卷 33-41页

作者： S.A.Saldana-Mendoza J.A.Ascacio-Valdes A.S.Palacios-Ponce J.c.contreras-Esquivel R.Rodriguez-Herrera H.A.Ruiz J.L.Martinez-Hernandez S.Sugathan c.N.Aguilar Bioprocesses and Bioproducts Research Group Food Research DepartmentAutonomous University of Coahuila25280 SaltilloMexico Faculty of Engineering in Mechanics and Production Sciences Polytechnic School of LitoralESPOLCampus Gustavo Galindo Km.30.5 Vía PerimetralP.O.Box 09-01-5863GuayaquilEcuador Microbiology Division Jawaharial Nehru Botanical Garden and Research InstitutePalodeThiruvananthapuramKerala 695562India

In this study,coffee pulp(coffea arabica)and green tea(camellia sinensis)residues were characterized for use as a substrate of solid-state fermentation for cellulases *** invasion rate was evaluated,as well as cellulases production by strains of Aspergillus niger and Trichoderma asperellum from the western Ghats of India,on coffee pulp,green tea,and a mixture of both substrates(50:50).***(AFP)strain was found to have the highest growth rate(0.409±0.021 mm/h)using a mixture of both *** production of cellulases by *** was unsatisfactory due to the presence of polyphenols in the supports to which *** cellulases are more *** production of cellulases by *** was linked to the pH of the supports,favouring the use of T and *** was found that the extracts produced by ***(28A strain using a mixture substrate,28A,and 20A strains using only green tea as a substrate)presented the highest cellulase activities when evaluated using a plate technique producing degradation halos of 2.3±0.1 cm of *** 28A strain did not require mineral enrichment media for cellulase production using green tea residues as support of solid-state fermentation.

关键词： cellulases Fungal strains Solid-state fermentation Agroindustrial wastes coffee pulp Green tea

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