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maximizing biomass utilization: An integrated strategy for coproducing multiple chemicals

journal of Energy Chemistry 2025年第1期100卷 180-191页

作者： Byeongchan Ahn Sua jo jonggeol Na j.jay Liu Young-ju Kim Wangyun Won Department of Chemical and Biological Engineering Korea University Department of Chemical Engineering (Integrated process) Kyung Hee University Department of Chemical Engineering and materials Science Ewha Womans University Department of Chemical Engineering Pukyong National University Resources Engineering Plant Research Department Korea Institute of Geoscience and Mineral Resources

Lignocellulosic biomass is one of the viable solutions to alleviate the global warming. However, the limited utilization of biomass majorly focused on cellulose and hemicellulose restricts the economic and environmental feasibilities. To cope with this issue, we proposed an integrated process of co-producing 1,6-hexanediol（1,6-HDO） with tetrahydrofuran and adipic acid from biomass, referred to as Strategy A. To compare the impacts of lignin upgrading and feedstock, Strategy B, which co-produces tetrahydrofuran alone, and Strategy C, which is the traditional route to produce 1,6-HDO from fossil fuels, were used. Heat networks are also designed to reduce operating costs and indirect carbon emissions due to energy consumption, saving 87% and 83% of the heat and cooling requirements, respectively, in Strategy A. The market competitiveness of Strategy A was evaluated by determining the minimum selling price through techno-economic analysis, and sustainability was thoroughly investigated by quantifying the environmental impacts through both midpoint and endpoint life-cycle assessments（LCAs）.Strategy A was found to be the most favorable both economically（USRDSCHARDOLLAR3,402/ton） and environmentally（-26.9 kg CO2eq.）. This indicates that lignin valorization is not only economically but also environmentally preferred. Finally, changes in economic and environmental feasibilities depending on economic, process, and environmental parameters were investigated using sensitivity and uncertainty analyses. The results of these analyses provide valuable insight into bio-based chemical production.

关键词： Biorefinery Carbon mitigation Climate change Global warming Lignin utilization Bioeconomy

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Definition of the Portuguese frameworks with international relevance as an input for the European geological heritage characterisation

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Episodes 2005年第3期28卷 177-186页

作者： j. Brilha C. Andrade A. Azeredo F.j.A.S. Barriga m. Cachāo2 H. Couto P.P. cunha j.A. Crispim P. Dantas L. v. Duarte m. C Freitas H.m. Granja m.H. Henriques P. Henriques L. Lopes j. madeira j.m.X. matos F. Noronha j. Pais j. Pifarra m.m. Ramalho j.m.R.S. Relvas A. Ribeiro A. Santos v.F.Santos P. Terrinha University of minho University of Lisbon National Natural History museum University of Porto University of Coimbra Portuguese Speleological Society INETInovacāo University of évora New University of Lisbon League for Nature Protection University of Algarve

This work constitutes the first contribution for the systematisation of geological heritage knowledge in Portugal, following the international recommendations for the characterisation of geological heritage （IUGS, ProGEO）. The application of the ProGEO methodology has resulted in the creation of fourteen frameworks with international relevance, established by consensus among the Portuguese geological community. The description of each category in this paper is not exhaustive and only the most relevant scientific settings are presented. The following are the three key outcomes of this work： i） At a national level, the most important geosites are identified, indicating where geoconservation efforts should be prioritised based on scientific justification; ii） At a regional level, conditions have been developed to foster dialogue with Spanish colleagues in order to create Iberian frameworks; iii） At an international level, it is now possible to integrate Portuguese geosites into the global inventories promoted by IUGS, UNESCO, and ProGEO.

关键词：葡萄牙欧洲地质条件地质图地形特征

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Diagnosing non-hepatocellular carcinoma malignancies on CT/mRI and contrast enhanced ultrasound: the Liver Imaging Reporting and Data System approach

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Hepatoma Research 2020年第4期6卷 60-69页

作者： Kathryn jFowler Guilherme moura cunha Tae Kyoung Kim Department of Diagnostic Radiology University of California at San DiegoSan DiegoCA 92130USA University of Toronto Joint Department of Medical ImagingUniversity Health Network/Mount Sinai Hospital/Women’s College HospitalToronto M5G 2N2Canada

The Liver Imaging Reporting and Data System(LI-RADS)provides a stepwise algorithmic approach that is proven to be highly accurate in diagnosing hepatocellular carcinoma(HCC)in patients at *** essential and early step in the algorithm is the diagnosis of malignancies other than HCC,such as cholangiocarcinoma and combined tumors,by application of LR-m features and *** LR-m category captures most non-HCC malignancies and some atypical *** exclusion of non-HCC malignancies is important for maintaining the high specificity of the LR-5,definite HCC *** review provides an overview of the approach to diagnosing non-HCC malignancies using LI-RADS CT/mRI and contrast enhanced ultrasound algorithms.

关键词： magnetic resonance imaging computer tomography contrast-enhanced ultrasound

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Optical properties of phosphate glasses co-doped with Yb^(3+) and silver nanoparticles

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Chinese Physics B 2014年第12期23卷 249-253页

作者： m.A.vallejo H. m.A.martinez G. A.v.Kiryanov j.L.Lucio m. Centro de Investigaciones enóptica Loma del Bosque 115 Col.Lomas del CampestreLeón 37150 Guanajuato Mxico División de Ciencias e Ingenierías del Campus León de la Universidad de Guanajuato Loma del Bosque 103Col.Lomas del Campestre37150León Guanajuato Mxico

We report the fabrication and spectroscopic characterization of Yb^3＋-doped phosphate glass, also containing silver nitrate. Scanning electron microscopy（SEm） provides the evidence of the formation of silver nano-particles（SNPs）, which are formed as a consequence of melting and thermal decomposition of Ag NO3. Absorption spectra of the samples in the visible-to-near-infrared spectral range reveal the presence of bands centered at 410 nm associated with the SNP-plasmon resonance, and at 976 nm due to the Yb^3＋. Under 916-nm laser-diode pumping, the effect of the SNP reflects that： i） the fluorescence in the 950-nm–1150-nm spectral range is strongly enhanced（～ 30 times）, while the fluorescence decay time associated with the ^2F5/2→^2F7/2transition of Yb^3＋ increases 25%, and ii） the basic lasing properties（saturation pumping intensity, the emission and absorption cross sections） are substantially improved.

关键词： rare earths phosphate glasses silver nanoparticles

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A review of the effects of dietary organic acids fed to swine

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journal of Animal Science and Biotechnology 2016年第1期7卷 67-77页

作者： mocherla v A N Suiryanrayna j v Ramana Livestock Research Station Sri Venkateswara Veterinary University

Animal production depends on nutrient utilization and if done there is an accelerated momentum towards growth with a low cost to feed ratio Public concern over the consumption of pork with antibiotic residues of the animals fed with antibiotic growth promoters （AGP） has paved the way to use other additives like herbs and their products, probiotics, prebiotics etc. Numerous feed additives are in vogue for achieving this target and one such classical example is the usage of organic acids and their salts. Usage of organic acids was in progress for over four decades. Early weaned piglets are （3-4 weeks age） exposed to stress with a reduced feed intake, little or no weight gain. This post weaning lag period is due to a limited digestive and absorptive capacity due to insufficient production of hydrochloric acid, pancreatic enzymes and sudden changes in feed consistency and intake. Lowering dietary pH by weak organic acids was found to overcome these problems. The main activity of organic acids is associated with a reduction in gastric pH converting the inactive pepsinogen to active pepsin for effective protein hydrolysis. Organic acids are both bacteriostatic and bactericidal. Lactic acid has been reported to reduce gastric pH and delay the multiplication of an enterotoxigenic E. coil These acids are the intermediary products in Kreb＇s cycle and thus act as an energy source preventing the tissue breakdown resulting from gluconeogenesis and lipolysis. Excretion of supplemental minerals and nitrogen are minimized with organic acids as these form complexes with minerals and aids for their bio-availability. Short chain fatty cids like acetic, propionic and n-butyric acid produced by microbial fermentation of dietary fibre in the large intestines may increase the proliferation of epithelial cells and have stimulatory effects on both endocrine and exocrine pancreatic secretions in pigs. Organic acids also enhances apparent total tract digestibility and improves growth performa

关键词： Chelation Improved productivity Organic acids Pathogen inhibition Protein utility Swine

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magnetic Behaviour of Tb/Si Nanoscale multilayers with Small Thickness of Rare Earth Layers

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Chinese Physics Letters 2007年第6期24卷 1717-1719页

作者： A.v. Svalov v.O. vas'kovskiy G.v. Kurlyandskaya j.m. Barandiaran N.N. Schegoleva A.N. Sorokin Ural State University Lenin Avenue 51 620083 Ekaterinburg Russia Universidad del Pals vasco UPv-EHU Facultad de Ciencias Depto Electricidad yVElectr6nica Apdo. 644'48080 Bilbao Spain Institute of metal Physics Ural Branch of RAS Kovalevskaya str. 18 620219 Ekaterinburg Russia

We report the magnetic properties of Tb/Si multilayers obtained by rf-sputtering at the Tb layer thickness LTb = 3 nm. Analysis of the magnetization processes indicates more complex behaviour than canonical spinglass transition. It is more probable that these multilayers contain both Tb superparamagnetic particles and Tb-Si spin-glass alloys.

关键词： SPIN-GLASS TRANSITION GD/W mULTILAYERS TERBIUm FILmS NANOPARTICLES

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Repurposing metformin for the treatment of gastrointestinal cancer

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World journal of Gastroenterology 2021年第17期27卷 1883-1904页

作者： Ademar Dantas cunha júnior Arinilda Campos Bragagnoli Felipe Osório Costa joséBarreto Campello Carvalheira Department of Internal medicine Division of OncologyUniversity of Campinas(UNICAMP)Campinas 13083-970São PauloBrazil Division of Oncology Hospital de Câncer de BarretosBarretos 14784-400São PauloBrazil

Diabetes mellitus type 2 and cancer share many risk *** pleiotropic insulin-dependent and insulin-independent effects of metformin might inhibit pathways that are frequently amplified in neoplastic ***,modulation of inflammation,metabolism,and cell cycle arrest are potential therapeutic cancer targets utilized by metformin to boost the anti-cancer effects of *** in vitro and in vivo models have demonstrated the potential of metformin as a chemo-and radiosensitizer,besides its chemopreventive and direct therapeutic activity in digestive system(DS)***,these aspects have been considered in many cancer clinical ***-control and cohort studies and associated meta-analyses have evaluated DS cancer risk and metformin usage,especially in colorectal cancer,pancreatic cancer,and hepatocellular *** clinical studies have demonstrated the protective role of metformin in the risk for DS cancers and survival *** the other hand,the ability of metformin to enhance the actions of chemotherapy for gastric and biliary cancers is yet to be *** article reviews the current findings on the anti-cancer mechanisms of metformin and its apparatus from pre-clinical and ongoing studies in DS malignancies.

关键词： Antidiabetic treatments Gastrointestinal tumors Therapeutic target

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Effect of nanoparticle(Pd, Pd/Pt, Ni) deposition on high temperature hydrogenation of Ti-v alloys in gaseous flow containing CO

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Progress in Natural Science:materials International 2017年第1期27卷 93-98页

作者： S.Suwarno m.Williams j.K.Solberg v.A.Yartys Department of mechanical Engineering Institut Teknologi Sepuluh Nopember Department of materials Science and Engineering NTNU Institute for Energy Technology University of the Western Cape

The hydrogenation properties of Ti-v hydrides coated with nanoparticles have been studied in gaseous mixtures of argon and hydrogen with and without additions of 1% CO. Nanoparticles of Pd, Ni, and co-deposited Pd/Pt with particle sizes of;0–60 nm were formed by electroless deposition on the hydride surfaces. The alloy resistance to CO could be significantly improved by particle deposition. Large amounts of hydrogen were absorbed in a CO-containing gas when Ni and Pd/Pt deposition had been applied, while pure Pd deposition had no positive effect. Ni was found to have a stronger effect than those of Pd/Pt and Pd, possibly because of the size effect of Ni nanoparticles.

关键词： metal hydride Titanium vanadium Nanoparticle Palladium Nickel Platinum Carbon monoxide

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Structural,morphological,optical and photoluminescent properties of spray-deposited ZnSe thin film

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journal of Semiconductors 2014年第11期35卷 5-9页

作者： G.m.Lohar S.K.Shinde v.j.Fulari Holography and material Research Laboratory Department of PhysicsShivaji University

ZnSe thin films are successfully deposited by spray pyrolysis deposition technique. Deposited thin films are characterized by X-ray diffraction study, and it reveals that spray-deposited ZnSe thin films are polycrystalline with hexagonal crystal structure. Surface morphology is carried out by scanning electron microscopy. It shows cotton-like morphology, and optical properties, such as absorbance, transmittance, reflectance, band gap, refrac- tive index, extinction coefficient are studied. Photoluminescence shows strong emission at 497 nm. Also, spray- deposited ZnSe thin films are hydrophilic in nature, which is shown by contact angle meter.

关键词： spray pyrolysis technique photoluminescence hydrophilicity ZnSe

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Eigenvalue Solver for Fluid and Kinetic Plasma models in Arbitrary magnetic Topology

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Communications in Computational Physics 2016年第6期20卷 136-155页

作者： D.A.Baver j.R.myra m.v.Umansky Lodestar Research Corporation Boulder Colorado 80301USA Lawrence Livermore National Laboratory USA

ArbiTER(Arbitrary Topology Equation Reader)is a new code for solving linear eigenvalue problems arising from a broad range of physics and geometry *** primary application area envisioned is boundary plasma physics in magnetic confinement devices;however ArbiTER should be applicable to other science and engineering fields as *** code permits a variable numbers of dimensions,making possible application to both fluid and kinetic *** use of specialized equation and topology parsers permits a high degree of flexibility in specifying the physics and geometry.

关键词： Plasma eigensolver finite difference method finite element method SLEPc PETSc field-line following coordinates snowflake divertor

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