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Scalable Ir-Doped NiFe₂O₄/TiO₂ heterojunction Anode for Decentralized Saline Wastewater Treatment and h₂ Production

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NANO-MICRO LETTERS 2025年第1期17卷 1-18页

作者： hong, Sukhwa Kim, Jiseon Park, Jaebeom im, Sunmi hoffmann, Michael R. Cho, Kangwoo Pohang Univ Sci & Technol POSTECh Div Environm Sci & Engn Pohang 790784 South Korea CALTECh Linde Labs Pasadena CA 91125 USA yonsei Univ Int Campus Inst Convergence Res & Educ Adv Technol I CREATE Incheon 21983 South Korea

Wastewater electrolysis cells (WECs) for decentralized wastewater treatment/reuse coupled with h-2 production can reduce the carbon footprint associated with transportation of water, waste, and energy carrier. This study reports Ir-doped NiFe2O4 (NFI, similar to 5 at% Ir) spinel layer with TiO2 overlayer (NFI/TiO2), as a scalable heterojunction anode for direct electrolysis of wastewater with circumneutral ph in a single-compartment cell. In dilute (0.1 M) NaCl solutions, the NFI/TiO2 marks superior activity and selectivity for chlorine evolution reaction, outperforming the benchmark IrO2. Robust operation in near-neutral ph was confirmed. Electroanalyses including operando X-ray absorption spectroscopy unveiled crucial roles of TiO2 which serves both as the primary site for Cl- chemisorption and a protective layer for NFI as an ohmic contact. Galvanostatic electrolysis of Nh4+-laden synthetic wastewater demonstrated that NFI/TiO2 not only achieves quasi-stoichiometric Nh4+-to-N-2 conversion, but also enhances h-2 generation efficiency with minimal competing reactions such as reduction of dissolved oxygen and reactive chlorine. The scaled-up WEC with NFI/TiO2 was demonstrated for electrolysis of toilet wastewater.

关键词： Wastewater electrolysis cell Ir-doped NiFe2O4 Reactive chlorine species Decentralized h-2 production On-site wastewater treatment

improved rate-distortion optimized video coding using non-integer bit estimation and multiple Lambda search

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Frontiers of Computer Science 2016年第1期10卷 157-166页

作者： Sio Kei im Mohammad Mahdi GhANDI MPI-QMUL Information Systems Research Centre Macao Polytechnic Institute Macao China Department of Electronic Systems Engineering University of Essex Colchestey CO4 3SQ UK

Many modern video encoders use the Lagrangian rate-distortion optimization （RDO） algorithm for mode deci- sions during the compression procedure. For each encoding stage, this approach involves minimizing a cost, which is a function of rate, distortion and a multiplier called Lambda. This paper proposes to improve the RDO process by applying two modifications. The first modification is to increase the ac- curacy of rate estimation, which is achieved by computing a non-integer number of bits for arithmetic coding of the syntax elements. This leads to a more accurate cost computation and therefore a better mode decision. The second modification is to search and adjust the value of Lambda based on the char- acteristics of each coding stage. For the encoder used, this paper proposes to search multiple values of Lambda for the intra-4x4 mode decision. Moreover, a simple shift in Lambda value is proposed for motion estimation. Each of these modi- fications offers a certain gain in RDO performance, and, when all are combined, an average bit-rate saving of up to 7.0% can be achieved for the h.264/AVC codec while the same concept is applicable to the h.265/hEVC codec as well. The extra added complexity is contained to a certain level, and is also adjustable according to the processing resources available.

关键词： rate distortion optimization Lambda adjust-ment non-integer bit estimation h.264/AVC h265/hEVCvideo coding

Structure-activity relationship of lysophosphatidylcholines in hL-60 human leukemia cells

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Acta Pharmacologica Sinica 2004年第11期 137-140页

作者： Eun-hee LEE,Jee h JUNG,Dong-soon im Laboratories of Pharmacology and Marine Natural Product Laboratories of Pharmacology and Marine Natural Product Laboratories of Pharmacology and Marine Natural Product College of Pharmacy Pusan National University Busan 609-735 Korea College of Pharmacy Pusan National University Busan 609-735 Korea College of Pharmacy Pusan National University Busan 609-735 Korea

Aim: To explore the structure-activity relationship of lysophosphatidylcholine (LPC) and lysolipid molecules from a marine sponge and ladybirds. METhODS: We tested three synthetic LPCs and four natural lysolipids on Ca2+ mobilization in hL-60 human leukemia cells. RESULTS: We observed lysolipid-mediated Ca2+ mobilization. The activity was the same in both ester- and ether-linked lysolipids, and introduction of a double bond or methoxy group on the alkyl chain did not significantly modulate the activity. however, replacement of trimethylammonium moiety in the choline structure with ammonium moiety reduced the activity. Furthermore, change of the alkyl chain length influenced the Ca2+ response. CONCLUSION: LPC-induced Ca2+ mobilization might be dependent on the length of alkyl chain and the presence of choline moiety in hL-60 leukemia cells.

关键词： lysophosphatidylcholines leukemia calcium signaling structure-activity relationship platelet activating factor

Comparison of the probiotic characteristics of Lactic Acid Bacteria (LAB) isolated from sourdough and infant feces

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Food Bioscience 2022年第3期47卷 992-997页

作者： yasemin Kaya Tayyibe Erten Melike Vurmaz hümeyra İspirli Ömer Şimşek Enes Dertli Bayburt University Central Research LaboratoryBayburtTurkey Bayburt University Department of Nutrition and DieteticsFaculty of Heath SciencesBayburtTurkey Pamukkale University Department of Food EngineeringFaculty of EngineeringDenizliTurkey yıldız Technical University Department of Food EngineeringFaculty of Chemical and Metallurgical EngineeringİstanbulTurkey

Probiotics are beneficial microorganisms with certain characteristics such as survival under gastrointestinal conditions,adhesion to intestinal surface and different functions which result in several health benefits to *** this regards,this study aimed to isolate Lactic Acid Bacteria (LAB) from sourdough and human feces as two different environments and to test their potential probiotic *** total nine distinct isolates were assessed with several probiotic functions such as in vitro adhesion to human colon cells,antimicrobial activities and survival under harsh gastrointestinal *** general,distinct strains showed strong antimicrobial activity against the pathogenic and fungal strains tested in this ***,the adhesion levels to hT29 cells were determined between 0.29 % and 9.54% and Lactobacillus paracasei F7B showed the highest *** isolates tolerated the bile salt after 24 h and the infant feces isolates showed good survival characteristics at ph 4.

关键词： Probiotic Sourdough Infant feces Adhesion

Layer resolved magnetization reversal study in SmCo_5 /Fe nanocomposite bilayers

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Chinese Physics B 2010年第3期19卷 528-532页

作者： F.Shahzad S.A.Siddiqi M.y.im A.Avallone P.Fischer Z.hussain I.Siddiqi F.hellman Centre for Solid State Physics University of the PunjabLahore-54590Pakistan Center for X-ray Optics Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA Advanced Light Source Berkeley LaboratoryUniversity of CaliforniaBerkeleyCA-94720USA Department of Physics University of CaliforniaBerkeleyCalifornia-94720USA

A hard/soft SmCo5/ Fe nanocomposite magnetic bilayer system is fabricated on x-ray transparent 100-200 nm thin SiaN4 films by magnetron sputtering. The microscopic magnetic domain pattern and its behaviours during magnetization reversal in the hard and the soft magnetic phases are studied separately by element specific magnetic soft x-ray microscopy at a spatial resolution of better than 25 Nm. We observe that the domain patterns for the soft and hard phases show coherent behaviours in varying magnetic fields. We derive local M（h） curves from the images of Fe and SmCo5 separately and find the switches for hard and soft phases to be the same.

关键词： multilayers x-ray microscopes magnetic properties of nanostructures

EFFECT OF ARTIFICIAL WEAThERING AND TEMPERATURE CyCLING ON ThE ADhESION STRENGTh OF WATERBORNE ACRyLATE COATING SySTEMS USED FOR WOODEN WINDOWS

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Journal of Green Building 2020年第1期15卷 3-14页

作者： Šimůnková Kristýna hýsek Štěpán Oberhofnerová Eliška Pánek Miloš Fidan hakan Faculty of Forestry and Wood Sciences Czech University of Life Sciences in PragueKamycka 129Prague 16500Czech Republic

The adhesion of coatings to wood is important for their long-term *** this study,the adhesion strength of water-based acrylate coatings used for wooden windows after exposure to artificial weathering(AW)and temperature cycling(TC)was *** analysis of the adhesion quality of coatings was performed via a pull-off test and failure *** 3-layered and 4-layered white and brown acrylate dispersions from six different producers were compared and the effect of coating thickness on adhesion strength was *** adhesion strength values proved to be very *** AW,the adhesion strength and its variability increased for all the *** had no statistically significant effect on the adhesion strength *** coating systems were initially characterized by lower adhesion strength,but after AW and TC,they reached higher adhesion strength values than brown *** overall highest adhesion after AW and TC was recorded for the coatings based on alkyd-acrylate hybrid basis(Producer 3),while the lowest adhesion variability after AW was measured for one type of tested acrylate coating(Producer 4).The effect of different layering on adhesion strength was not demonstrated in this study.

关键词： acrylate coatings adhesion strength artificial weathering coating thickness pull-off test temperature cycling

Interfacial modulation of bifunctional electrolyte additive engineering for dendrite-free and robust lithium metal anode

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Journal of Energy Chemistry 2024年第10期97卷 120-127,I0003页

作者： Mahammad Rafi Shaik yongmin Park young-Kwang Jung Won Bin im Division of Materials Science and Engineering Hanyang University222Wangsimni-roSeongdongguSeoul 0473Republic of Kor Department of Chemical Engineering and Biotechnology University of CambridgeCambridge CB3 OASUK

Anode materials for rechargeable electric car batteries are obtained from Li-metal owing to their extremely high specific capacity and low redox ***,safety concerns related to dendrite formation on the anode surface caused by the uneven distribution of Li-ions during the discharge process interfere with the use of Li-metal in industrial *** this study,methyl vinyl sulfone(MVS),a sulfone-based functional electrolyte additive,is used in an additive engineering strategy to control Lielectrolyte interactions and address the aforementioned *** dendrite growth may be restricted,and transition metal degradation on the surface of the cathode can be reduced by the MVS-derived functional electrolyte additive interfacial *** electrochemical performance of an ethylene carbonate/dimethyl carbonate(EC/DMC)+1 wt% MVS Li-metal anode of a Li||Li symmetric cell exhibits remarkable cycle stability,maintaining a low overvoltage for over 750 h at 1 mA cm^(-2),and capacity of 1 mA h cm^(-2).Additionally,LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811) full cells with the MVS additive exhibit enhanced electrochemical stability for 250 cycles at a current density of 100 mA g^(-1).This study provides an innovative approach for stabilizing the metal-electrolyte interfacial layer that may be used for practical applications in metal-based rechargeable batteries.

关键词： Lithium rechargeable battery Dendrite-free Electrolyte additive Bifunctional electrolyte Interfacial layer

Acetylacetone-TiO_(2) Promoted Large Area Compatible Cascade Electron Transport Bilayer for Efficient Perovskite Solar Cells

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Energy & Environmental Materials 2024年第2期7卷 221-228页

作者： hyong Joon Lee Jin Kyoung Park Jin hyuck heo Sang hyuk im Department of Chemical and Biological Engineering Korea University145 Anam-ro Seongbuk-guSeoul 17104Korea

In designing efficient perovskite solar cells(PSCs),the selection of suitable electron transport layers(ETLs)is critical to the final device performance as they determine the driving force for selective charge ***_(2)nanoparticles(NPs)based ETLs have been a popular choice for PSCs due to superior electron mobility,but their relatively deep-lying conduction band energy levels(ECB)result in substantial potential ***,TiO_(2)NPs establish favorable band alignment owing to shallower ECB,but their low intrinsic mobility and abundant surface trap sites impede the final *** this reason,constructing a cascaded bilayer ETL is highly desirable for efficient PSCs,as it can rearrange energy levels and exploit on advantages of an individual *** this study,we prepare SnO_(2)NPs and acetylacetone-modified TiO_(2)(Acac-TiO_(2))NPs and implement them as bilayer SnO_(2)/Acac-TiO_(2)(BST)ETL,to assemble cascaded energy band ***_(2)contributes to rapid charge carrier transport from high electron mobility while Acac-TiO_(2)minimizes band-offset and effectively suppresses interfacial ***,the optimized BST ETL generates synergistic influence and delivers power conversion efficiency(PCE)as high as 23.14%with open-circuit voltage(V_(oc))reaching 1.14 ***,the BST ETL is transferred to a large scale and the corresponding mini module demonstrates peak performance of 18.39%PCE from 25 cm^(2)aperture ***,the BST-based mini module exhibit excellent stability,maintaining 83.1%of its initial efficiency after 1000 h under simultaneous 1 Sun light-soaking and damp heat(85℃/Rh 85%)environment.

关键词： acetylacetone large area perovskite solar cells TiO_(2)

Multimodal imaging in Purtscher-like retinopathy associated with sarcoidosis:a case report

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International Journal of Ophthalmology(English edition) 2022年第5期15卷 845-847页

作者： héla Kaoual Inés hachicha Ilhem Mili Boussen imène Zhioua-Braham Mejdi Boukari Raja Zhioua Department of Ophthalmology Charles Nicolle University HospitalTunis 1007Tunisia Faculty of Medicine of Tunis University of Tunis-El ManarTunis 1006Tunisia

Dear Editor,We report a case of Purtscher-like retinopathy(PLR)in the presence of acute pancreatitis secondary to *** our knowledge,this is the first case report of a PLR in a patient with sarcoidosis.

关键词： acute sarcoidosis Purtscher