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China Foundry 2014年第2期11卷 132-138页

作者： R.dańko M.Holtzer j.dańko AGH University of Science and Technology Faculty of Foundry Engineering

Mechanical reclamation processes of spent moulding sands generate large amounts of postreclamation dusts mainly containing rubbed spent binding agents and quartz dusts. The amount of postreclamation dusts, depending in the reclamation system effi ciency and the reclaim dedusting system, can reach 5%-10% in relation to the total reclaimed spent moulding sand. The proper utilization of such material is a big problem facing foundries these days. This study presents the results of investigations of physicochemical properties of post- reclamation dusts. All tested dusts originated from various Polish cast steel plants applying the mechanical reclamation process of moulding sands with alkaline resins, obtained from different producers. Different dusts, delivered from foundries, were tested to determine their chemical composition, granular characterization, physicochemical and energetic properties. Presented results confi rmed assumptions that it is possible to utilize dusts generated during mechanical reclamation of used sands with organic resins as a source of energy.

关键词： dust recycling environmental protection reclamation moulding and core sands energy

Photobiomodulation:a novel approach to promote trans-differentiation of adipose-derived stem cells into neuronal-like cells

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Neural Regeneration Research 2025年第2期20卷 598-608页

作者： daniella da Silva Madeleen jansen van Rensburg Anine Crous Heidi Abrahamse Laser Research Centre Faculty of Health SciencesUniversity of JohannesburgDoornfonteinJohannesburgSouth Africa

Photobiomodulation,originally used red and near-infrared lasers,can alter cellular *** has been demonstrated that the visible spectrum at 451-540 nm does not necessarily increase cell proliferation,near-infrared light promotes adipose stem cell proliferation and affects adipose stem cell migration,which is necessary for the cells homing to the site of *** this in vitro study,we explored the potential of adipose-derived stem cells to differentiate into neurons for future translational regenerative treatments in neurodegenerative disorders and brain *** investigated the effects of various biological and chemical inducers on trans-differentiation and evaluated the impact of photobiomodulation using 825 nm near-infrared and 525 nm green laser light at 5 j/*** adipose-derived stem cells can be used in autologous grafting and photobiomodulation has been shown to have biostimulatory *** findings reveal that adipose-derived stem cells can indeed trans-differentiate into neuronal cells when exposed to inducers,with pre-induced cells exhibiting higher rates of proliferation and trans-differentiation compared with the control ***,green laser light stimulation led to notable morphological changes indicative of enhanced trans-differentiation,while near-infrared photobiomodulation notably increased the expression of neuronal *** biochemical analysis and enzyme-linked immunosorbent assays,we observed marked improvements in viability,proliferation,membrane permeability,and mitochondrial membrane potential,as well as increased protein levels of neuron-specific enolase and ciliary neurotrophic ***,our results demonstrate the efficacy of photobiomodulation in enhancing the trans-differentiation ability of adipose-derived stem cells,offering promising prospects for their use in regenerative medicine for neurodegenerative disorders and brain injuries.

关键词： differentiation inducers green photobiomodulation immortalized adipose-derived stem cell near-infrared photobiomodulation neurodegenerative disease neurogenesis photobiomodulation trans-differentiation

Criteria for an advanced assessment of quality of moulding sands with organic binders and reclamation process products

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China Foundry 2013年第3期10卷 181-186页

作者： R.dańko AGH-University of Science and Technology Faculty of Foundry Engineering

Reclamation of used moulding and core sands has been defined as a treatment of waste moulding refractory materials, enabling a recovery of at least one of the components having properties similar to those of the fresh component, and reuse for production of casting moulds and cores. However, at present, there is a lack of a reclaimed material assessment index, which could be applied to each type of moulding sand and reclaim. Modern investigation methods and equipment for the estimation of the quality of the moulding sands matrices with organic binders, in their circulation process, are presented in this paper. These methods, utilizing the special equipment combined with the author's investigation methods developed in the Faculty of Foundry Engineering, AGH - University of Science and Technology, allow the better estimation of the matrix quality both in an aspect of its application as a fresh sand substitute in the preparation of moulding sands, and also with regard to the environmental protection. The most important criteria for the technological assessment of the reclaimed materials and the quality of sands with organic binders are presented in this paper.

关键词： reclamation moulding sand moulding sand examinations environmental protection

A Periglacial Palaeoenvionment in the Upper Carboniferous-Lower Permian Tobra Formation of the Salt Range,Pakistan

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Acta Geologica Sinica(English Edition) 2017年第3期91卷 1063-1078页

作者： Irfan U.jAN Shahid IQBAL Sarah j.da VIES jan A.ZALASIEWICZ Michael H.STEPHENSON Michael WAGREICH Muhammad HANEEF Muhammad HANIF Sajjad AHMAD National Centre of Excellence in Geology University of Peshawar Department of Earth Sciences Quaid-i-Azam University Islamabad Department of Geodynamics and Sedimentology University of Vienna Department of Geology University of Leicester British Geological Survey Department of Earth Sciences Comsats Institute of Technology Abbottabad Department of Geology University of Peshawar

The Upper Carboniferous-Lower Permian （Upper Pennsylvanian-Asselian） Tobra Formation is exposed in the Salt and Trans Indus ranges of Pakistan. The formation exhibits an alluvial plain （alluvial fan-piedmont alluvial plain） facies association in the Salt Range and Khisor Range. In addition, a stream flow facies association is restricted to the eastern Salt Range. The alluvial plain facies association is comprised of clast-supported massive conglomerate （Gmc）, diamictite （Dm） facies, and massive sandstone （Sm） iithofacies whereas the stream flow-dominated alluvial plain facies association includes fine-grained sandstone and sUtstone （Fss）, fining upwards pebbly sandstone （Sf）, and massive mudstone （Fro） lithofacies. The lack of glacial signatures （particularly glacial grooves and striations） in the deposits in the Tobra Formation, which are, in contrast, present in their time-equivalent and palaeogeographically nearby strata of the Arabian peninsula, e.g. the Al Khlata Formation of Oman and Unayzah B member of the Sandi Arabia, suggests a pro-to periglacial, i.e. glaciofluvial depositional setting for the Tobra Formation. The sedimentology of the Tobra Formation attests that the Salt Range, Pakistan, occupied a palaeogeographic position just beyond the maximum glacial extent during Upper Pennsylvanian-Asselian time.

关键词： Pennsylvanian-Asselian Tobra Formation Salt Range Khisor Range glaciofluvial Pakistan

Unimodal Sequences of Gorenstein Ideals of Codimension 4

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Acta Mathematica Sinica,English Series 1998年第4期14卷 563-568页

作者： Hyoung j. ko Department of Mathematics. Yonsei University 134 Shinchon-dong Seodaemun-gu. Seoul Korea 120-749

We present Gorenstein ideals of condimension 4 which have unimodal Hilbert functions.

关键词： k-configuration Hilbert function Minimal free resolution Gorenstein ideal of codimension 4

Numerical analysis of thermal plasma scrubber for CF4 decomposition

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Plasma Science and Technology 2019年第6期21卷 9-14页

作者： j ko T H KIM S CHOI Department of Nuclear and Energy Engineering Jeju National University Jeju 63243 Republic of Korea Institute for Nuclear Science and Technology Jeju National University Jeju 63243 Republic of Korea

CF4 gas emitted in the semiconductor and display manufacturing process is a very harmful greenhouse *** must be removed or converted safely due to its extreme *** a CF4 decomposition system using a thermal plasma scrubber was commercialized,its removal efficiency is *** this work,a numerical analysis of CF4 decomposition in the thermal plasma scrubber was carried out in order to propose an efficient decomposition *** decomposition and recombination temperatures of CF4 were analyzed using thermodynamic equilibrium *** chemical reaction of CF4 decomposition into carbon and fluorine gas was considered in this numerical *** injection position and angle of the CF4 were controlled in order to enhance the decomposition *** vertical injection of CF4 near the torch exit improved the mixing of the CF4 with the thermal plasma *** addition,it was confirmed that the high temperature region expanded due to a vortex generated by strong turbulence in the bottleneck-shaped *** a result,it is revealed that the CF4 injection location and the reactor configuration are the most important factors in improving the decomposition rate.

关键词： numerical simulation decomposition CF4 thermal plasma scrubber

Validation of a 3D-printed human temporal bone model for otology surgical skill training

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World journal of Otorhinolaryngology-Head and Neck Surgery 2021年第9期7卷 88-93页

作者： Wade W.Chien Melville j.da Cruz Howard W.Francis Department of Otolaryngology-Head&Neck Surgery Johns Hopkins School of MedicineBaltimoreMDUSA Department of Otolarynsology Westmeod HospitalSydneyAustralia Department of Surgery University of SydneySydneyAustralia Department of Otolaryngolosy-Head&Neck Sursery Duke University School of MedicineDurhamNCUSA

Hypothesis:Three-dimensional(3D)printed temporal bones are comparable to cadaveric temporal bones as a training tool for otologic ***:Cadaveric temporal bone dissection is an integral part of otology surgical ***,availability of cadaveric temporal bones is becoming much more limited and concern regarding chemical and biological risks *** this study,we examine the validity of 3D-printed temporal bone model as an alternative training tool for otologic ***:Seventeen otolaryngology trainees participated in the *** were asked to complete a series of otologic procedures using 3D-printed temporal bones.A semi-structured questionnaire was used to evaluate their dissection experience on the 3D-printed temporal ***:Participants found that the 3D-printed temporal bones were anatomically realistic compared to cadaveric temporal *** found that the 3D-printed temporal bones were useful as a surgical training tool in general and also for specific otologic ***,participants were enthusiastic about incorporation of 3D-printed temporal bones in temporal bone dissection training courses and would recommend them to other ***:3D-printed temporal bone model is a viable alternative to human cadaveric temporal bones as a teaching tool for otologic surgery.

关键词： Temporal bone Otologic surgery 3D-printing 3D-printed temporal bone Surgical training Surgical simulation

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Beyond first-line chemotherapy for advanced pancreatic cancer:An expanding array of therapeutic options?

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World journal of Gastroenterology 2014年第9期20卷 2224-2236页

作者： Evan j Walker Andrew H ko University of California Helen Diller Family Comprehensive Cancer Center San Francisco CA 94115 United States

While an increasing number of therapeutic options are now available for the first-line treatment of locally advanced or metastatic pancreatic cancer,the optimal choice for treatment in the second-line setting and beyond is less well defined.A variety of cytotoxic agents,either alone or in combination,have been evaluated,although primarily in the context of small single-arm or retrospective *** regimens have been associated with median progression-free survival rates in the range of 2-4 mo and overall survival rates between 4-8mo,highlighting the very poor prognosis of patients who are candidates for such *** therapies studied in this chemotherapy-refractory setting,meanwhile,have produced even worse efficacy *** the current article,we review the clinical evidence for treatment of refractory disease,primarily in patients who have progressed on front-line gemcitabine-based *** the process,we highlight the limitations of the available data to date as well as some of the challenges in designing appropriate clinical trials in this salvage setting,including how to select an appropriate control arm given the absence of a wellestablished reference standard,and the importance of incorporating predictive biomarkers and quality of life measures whenever possible into study design.

关键词： Pancreatic cancer Refractory Second-line chemotherapy Gemcitabine

Apples to oranges:environmentally derived,dynamic regulation of serotonin neuron subpopulations in adulthood?

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Neural Regeneration Research 2025年第9期20卷 2596-2597页

作者： Christopher j.O’Connell Matthew j.Robson Department of Genetics College of MedicineHarvard UniversityBostonMAUSA james L.Winkle College of Pharmacy Division of Pharmaceutical SciencesUniversity of CincinnatiCincinnatiOHUSA Neuroscience Graduate Program College of MedicineUniversity of CincinnatiCincinnatiOHUSA

Traumatic brain injury(TBI)is a public health problem with an undue economic burden that impacts nearly every age,ethnic,and gender group across the globe(Capizzi et al.,2020).TBIs are often sustained during a dynamic range of exposures to energetic environmental forces and as such outcomes are typically heterogeneous regarding severity and pathology(Capizzi et al.,2020).

关键词： sustained orange dynamic

Kinetics and thermodynamic studies of Methyl Orange removal by polyvinylidene fluoride-PEDOT mats

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journal of Environmental Sciences 2021年第2期33卷 62-73页

作者： Romario j.da Silva Lizeth Carolina Mojica-Sanchez Filipe D.S.Gorza Graciela C.Pedro Bruna G.Maciel Gabriela P.Ratkovski Herica D.daRocha Kamila T.O.do Nascimento juan CMedina-Llamas Alicia E.Chavez-Guajardo jose j.Alcaraz-Espinoza Celso P.de Melo Program a de Pos-Graduagao em Ciencia de Materials U niversidade Federal de Pernambuco50670-901 RecifePEBrazil Departamento de Ffsica Uniuersidade Federal de Pemambiico50670-901 Reci/ePEBrazil Centro de Estudios Cientificosy Tecnologicos No.18 Instituto Politecnico Nacional98160 ZacatecasZacMexico Unidad Academica de Ciencias de la Tierra Uniuersidad Aut6noma de Zacatecas98058 ZacatecasZacMexico Departamento de Quimica Universidad Autonoma Metropolitana09340Ciudad de MexicoMexico

We report the preparation of poly(3,4-ethylene dioxythiophene)(PEDOT)-modified polyvinylidene fluoride electrospun fibers and their use as a novel adsorbent material for the removal of the anionic dye Methyl Orange(MO)from aqueous *** novel adsorbent material can be used to selectively remove MO on a wide p H range(3.0-10.0),with a maximum capacity of 143.8 mg/g at p H *** used in a recirculating filtration system,the maximum absorption capacity was reached in a shorter time(20 min)than that observed for batch mode experiments(360 min).Based on the analyses of the kinetics and adsorption isotherm data,one can conclude that the predominant mechanism of interaction between the membrane and the dissolved dye molecules is ***,considering the estimated values for the Gibbs energy,and entropy and enthalpy changes,it was established that the adsorption process is spontaneous and occurs in an endothermic *** good mechanical and environmental stability of these membranes allowed their use in at least 20 consecutive adsorption/desorption cycles,without significant loss of their *** suggest that the physical-chemical characteristics of PEDOT make these hybrid mats a promising adsorbent material for use in water remediation protocols and effluent treatment systems.

关键词： Electrospinning Composite mats Pedot Pvdf mats Dye removal Water remediation