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Reinforcing effects of polypropylene on energy absorption and fracturing of cement-based tailings backfill under impact loading

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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 650-664页

作者： Jiajian Li Shuai Cao Erol yilmaz School of Civil and Resources Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of High-Efficient Mining and Safety of Metal Mines of Ministry of Education University of Science and Technology BeijingBeijing 100083China Department of Civil Engineering Geotechnical DivisionRecep Tayyip Erdogan UniversityFenerRize TR53100Turkey

Polypropylene(PP)fiber-reinforced cement-based tailings backfill(FRCTB)is a green compound material with superior crack resistance and has good prospects for application in underground ***,FRCTB exhibits susceptibility to dynamic events,such as impact ground pressure and blast *** paper investigates the energy and crack distribution behavior of FRCTB under dynamic impact,considering the height/diameter(H/D)*** Hopkinson pressure bar,industrial computed tomography scan,and scanning electron microscopy(SEM)experiments were carried out on six types of *** outcomes confirmed fiber aggregation at the bottom of *** H/D was less than 0.8,the proportion of PP fibers distributed along theθangle direction of80°-90°*** the total energy,all samples presented similar energy absorption,reflectance,and ***,a rise in H/D may cause a rise in the energy absorption rate of FRCTB during the peak phase.A positive correlation existed between the average strain rate and absorbed energy per unit *** increase in H/D resulted in a decreased crack volume fraction of *** the H/D was greater than or equal to 0.7,the maximum crack volume fraction of FRCTB was observed close to the incidence *** cracks were present only in the FRCTB with an H/D ratio of *** with H/D ratios of 0.5 and 0.6 showed similar distributions of weakly and heavily damaged *** fibers can limit the emergence and expansion of cracks by influencing their *** observations revealed considerable differences in the bonding strengths between fibers and the *** that adhered particularly well to the substrate were attracted together with the hydration products adhering to *** results show that FRCTB is promising as a sustainable and green backfill for determining the design properties of mining with backfill.

关键词： cement-based tailings fiber-reinforced backfills fracture energy absorption impact loading

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Clinical and therapeutic considerations of rectal lymphoma: A case report and literature review

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World Journal of Gastroenterology 2005年第3期11卷 460-461页

作者： yilmaz bilsel Emre Balik Sumer Yamaner Dursun Bugra General Surgery Clinic Department of General Surgery

Primary rectal lymphoma is a rare presentation of gastrointestinal lymphomas. Its clinical presentation is indistinguishable from that of rectal carcinoma. Although surgical resection is often technically feasible, optimal therapy for colorectal lymphoma has not yet been *** report a case of primary rectal lymphoma (nonHodgkin's large cell lymphoma of type B) with high-grade features that disappeared completely after chemoradiotherapy. This case underlines that primary treatment with systemic chemotherapy and involved-field radiotherapy can be successful for rectal lymphoma, with surgery reserved for complications and chemotherapy failures.

关键词：直肠淋巴瘤肿瘤消化系统化学疗法

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Deciphering the implications of MAFLD and MASLD definitions in the NAFLD population:results from a single-center biopsy study

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Chinese Medical Journal 2024年第5期137卷 616-618页

作者： Eda Kaya Yusuf yilmaz Department of Internal Medicine Ruhr University BochumUniversity Hospital Knappschaftskrankenhaus BochumBochum 44892Germany Institute of Gastroenterology Marmara Universityİstanbul 34840Turkey Department of Gastroenterology School of MedicineRecep Tayyip Erdoğan UniversityRize 53100Turkey

To the Editor:The nomenclature for steatotic liver disease has been a topic of debate since *** conventional expression,non-alcoholic fatty liver disease(NAFLD),was introduced in 1980 to describe the occurrence of steatosis in the absence of other hepatic ***,in recent years,there has been a growing movement to phase out and retire this *** 2020,Eslam et al^([1])proposed a new definition—metabolic(dysfunction)associated fatty liver disease(MAFLD)—redefining the disease to include hepatic steatosis along with other factors such as diabetes,obesity,overweight,or meeting the criteria for metabolic dysfunction.

关键词： NAFLD liver MAF

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Management of cytomegalovirus infection after liver transplantation

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World Journal of Transplantation 2024年第3期14卷 30-39页

作者： Zeynep Burcin yilmaz Funda Memisoglu Sami Akbulut Infectious Diseases and Clinical Microbiology Inonu University Faculty of MedicineMalatya 44280Türkiye Surgery and Liver Transplant Institute Inonu University Faculty of MedicineMalatya 44280Türkiye

Cytomegalovirus(CMV)infection is one of the primary causes of morbidity and mortality following liver transplantation(LT).Based on current worldwide guidelines,the most effective strategies for avoiding post-transplant CMV infection are antiviral prophylaxis and pre-emptive ***-IgG serology is the established technique for pretransplant screening of both donors and *** clinical presentation of CMV infection and disease exhibits variability,prompting clinicians to consistently consider this possibility,partic-ularly within the first year post-transplantation or subsequent to heightened *** annual symposia to discuss CMV prevention and how treatment outcomes can be improved,evidence on the incorporation of immune functional tests into clinical practice is presented,and the results of studies with new antiviral treatments are *** there are ongoing studies on the use of letermovir and maribavir in solid organ transplantation,a consensus reflected in the guidelines has not been *** the most appro-priate strategy at the individual level appears to be the key to enhancing *** prevention strategies reduce the risk of CMV disease,the disease can still occur in up to 50%of high-risk patients.A balance between the risk of infection and disease development and the use of immunosuppressants must be considered when talking about the proper management of CMV in solid organ transplant *** objective of this study was to establish a compre-hensive framework for the management of CMV in patients who have had LT.

关键词： Liver transplantation Cytomegalovirus Antiviral prophylaxis Preemptive treatment Valganciclovir Ganciclovir

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Epidemic management in a measles outbreak in 2023,the return of vaccine-preventable diseases:A single center,retrospective observational study

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Asian Pacific Journal of Tropical Medicine 2024年第3期17卷 110-118页

作者： Sevgi Aslan Tuncay Gulsen Akkoc Seyhan yilmaz Burcu Parlak Pinar Canizci Erdemli Aylin Dizi Isik Didem Buyuktas Aytac Meryem Cagla Abaci Capar Eda Kepenekli Kadayifci Marmara University Faculty of Medicine Department of Pediatric Infectious DiseaseIstanbulTurkey

Objective:To investigate the importance of immunization in preventing measles infection and to determine the most useful laboratory tests for confirmation of ***:This study included pediatric cases evaluated with a presumed diagnosis of measles between December 2022 and June 2023,at Marmara University Pendik Training and Research *** effects of vaccination status and underlying disease on the clinical course,treatments,and complications were ***:In total,117 patients were enrolled in the study with a median age of 80 months(IQR:32.5-125.0).Twelve patients with contact history were asymptomatic and had an underlying disorder,and intravenous immunoglobulin was given to them for post-exposure ***-one patients had confirmed measles *** treatment was given to three patients(a newborn,a girl with rhabdomyosarcoma,and a healthy boy)with respiratory ***-eight percent of confirmed measles cases were unvaccinated,and all hospitalized cases were unvaccinated or *** full-vaccinated children had confirmed measles *** PCR from nasopharyngeal swabs was negative in all of them,and their diagnosis was established with anti-measles IgM ***:The measles vaccine is the most effective way to protect from measles and measles-related *** measles can also occur in fully vaccinated patients,the disease is milder than in unvaccinated *** ELISA and RT-PCR tests together may be beneficial in patients with high clinical suspicion for early diagnosis.

关键词： Measles Outbreak Vaccination Vitamin A Ribavirin

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Inhibition of Ehrlich ascites carcinoma growth by melatonin:Studies with micro-CT

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Oncology Research 2024年第1期32卷 175-185页

作者： SEHER yilmaz ZÜLEYHA DOĞANYIĞIT MERT OCAK EVRIM SUNA ARIKAN SÖYLEMEZ ASLI OKAN OFLAMAZ SÜMEYYE UÇAR ŞÜKRÜATEŞ AMMAD AHMAD FAROOQI Department of Anatomy Faculty of MedicineYozgat Bozok UniversityYozgatTurkey Department of Mechanical and Aerospace Engineering Case Western Reserve UniversityClevelandOhioUSA Department of Histology and Embriology Faculty of MedicineYozgat Bozok UniversityYozgatTurkey Department of Anatomy Faculty of DentistryAnkara UniversityAnkaraTurkey Department of Medical Biology Faculty of MedicineAfyonkarahisar Health Sciences UniversityAfyonTurkey Department of Anatomy Faculty of MedicineErciyes UniversityKayseriTurkey Department of Molecular Oncology Institute of Biomedical and Genetic Engineering(IBGE)IslamabadPakistan

Melatonin is a versatile indolamine synthesized and secreted by the pineal gland in response to the photoperiodic information received by the retinohypothalamic signaling *** has many benefits,such as organizing circadian rhythms and acting as a powerful *** aimed to show the antitumor effects of melatonin in both in vivo and in vitro models through the mammalian target of rapamycin(mTOR)signaling pathway and the Argyrophilic Nucleolar Regulatory Region(AgNOR),using the Microcomputed Tomography(Micro CT).Ehrlich ascites carcinoma(EAC)cells were administered into the mice by subcutaneous *** with solid tumors were injected intraperitoneally with 50 and 100 mg/kg melatonin for 14 *** measurements for the taken tumors were made with micro-CT imaging,immunohistochemistry(IHC),real-time polymerase chain reaction(PCR)and ***,the tumor tissue volume in the Tumor+100 mg/kg melatonin group was significantly lower than that in the other groups in the data obtained from micro-CT *** the IHC analysis,the groups treated with Tumor+100 mg/kg melatonin were compared when the mTOR signaling pathway and factor 8(F8)expression were compared with the control *** was determined that there was a significant decrease(p<0.05).Significant differences were found in the total AgNOR area/nuclear area(TAA/NA)ratio in the treatment groups(p<0.05).Furthermore,there were significant differences between the amount of mTOR mRNA for the phosphatidylinositol 3-kinase(PI3K),AKT Serine/Threonine Kinase(PKB/AKT)genes(p<0.05).Cell apoptosis was evaluated with Annexin V in an in vitro study with different doses of melatonin;It was observed that 100µg/mL melatonin dose caused an increase in the apoptotic cell *** this study,we have reported anti-tumor effects of melatonin in cell culture studies as well as in mice *** characterization of the melatonin-mediated cancer inhibitory effects will be valuable in advanc

关键词： Signaling pathway Apoptosis Real-time PCR AgNOR

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An oxygenating colloidal bioink for the engineering of biomimetic tissue constructs

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Bio-Design and Manufacturing 2024年第3期7卷 240-261页

作者： Seol-Ha Jeong Jarno Hiemstra Patrick V.Blokzijl Rebeca Damian-Ferrara Danilo Martins dos Santos Jéssica H.L.da Fonseca Min-Ho Kang Jihyun Kim Dilara yilmaz-Aykut Mei L.L.Cham-Pérez Jeroen Leijten Su Ryon Shin Division of Engineering in Medicine Department of MedicineBrigham and Women’s HospitalHarvard Medical SchoolBostonMA 02139USA Leijten Lab Department of Developmental BioEngineeringFaculty of Science and TechnologyTechnical Medical CentreUniversity of TwenteDrienerlolaan 57522 NB EnschedeThe Netherlands Nanotechnology National Laboratory for Agriculture(LNNA) Embrapa InstrumentaçãoSao CarlosSao Paulo 13560-970Brazil Department of Biomedical-Chemical Engineering The Catholic University of Korea43 Jibong-roBucheon-siGyeonggi-do 14662Republic of Korea Department of Biotechnology The Catholic University of Korea43 Jibong-roBucheon-siGyeonggi-do 14662Republic of Korea

Ensuring a sufficient oxygen supply is pivotal for the success of bioprinting applications since it fosters tissue integration and natural *** in oxygen concentration among diverse tissues necessitates the precise recreation of tissue-specific oxygen levels in imprinted constructs to support the survival of targeted *** oxygen-releasing biomaterials,such as oxygen-generating microparticles(OMPs),have shown promise for enhancing the oxygen supply of microenvironments in injured tissues,whether this approach is scalable for large tissues and whether tissue-specific bioinks with varying OMP concentrations remain printable remain *** study addresses this critical gap by introducing an innovative class of engineered oxygenated bioinks that combine colloidal-based microgels with *** report that incorporating nanosized calcium peroxide(nCaO_(2))and manganese oxide nanosheets(nMnO_(2))into hydrophobic polymeric microparticles enables precise modulation of oxygen release while controlling hydrogen peroxide ***,the fabrication of oxygenating and cytocompatible colloidal gels is achieved using an aqueous two-phase *** study thoroughly evaluates the fundamental characteristics of the resulting bioink,including its rheological behaviors,printability,shape fidelity,mechanical properties,and oxygen release ***,this study demonstrates the macroscopic scalability and cytocompatibility of printed constructs produced via cell-laden oxygenating colloidal *** showcasing the effectiveness of extrusion-based bioprinting,this study underscores how it can be used to fabricate biomimetic tissues,indicating its potential for new *** findings presented here advance the bioprinting field by achieving scalability with both high cell viability and the possibility of mimicking specifically oxygenated *** work thereby offers a promising avenue for the development of functional tissues with e

关键词： 3D bioprinting Bioink Colloidal gels Extrusion printing Oxygen-generating microparticle

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Confirmation of a Sub-Saturn-size Transiting Exoplanet Orbiting a G Dwarf:TOI-1194 b and a Very Low Mass Companion Star: TOI-1251 B from TESS

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Research in Astronomy and Astrophysics 2024年第3期24卷 129-143页

作者： Jia-Qi Wang Xiao-Jun Jiang Jie Zheng Hanna Kellermann Arno Riffeser Liang Wang Karen A.Collins Allyson Bieryla Lars A.Buchhave Steve B.Howell Elise Furlan Eric Girardin Joao Gregorio Eric Jensen Felipe Murgas Mesut yilmaz Sam Quinn Xing Gao Ruo-Yu Zhou Frank Grupp Hui-Juan Wang CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy Of SciencesBeijing 10010China University of Chinese Academy of Sciences Beijing 100049China University Observatory Munich Scheinertrsse 1.D-81679 MunichGemany Max Planck Institute for Extraterrestrial Physics Giessenbachstr.1D-85748 GarchingGermany National Astronomical Observatories/Nanjing Institute of Astronomical Optics&Technology Chinese Academy of SciencesNanjing210042China CAS Key Laboratory of Astronomical Optics&Technology Nanjing Institute of Astronomical Optics&TechnologyNanjing 210042China Center for Astrophysics Harvard&Smithsonian60 Garden Street.CambridgeMA 02138USA National Space Institute Technical University of DenmarkElektrovejDK-2800 KgsLyngbyDenmark NASA Ames Research Center Moffett FieldCA 94035USA NASA Exoplanet Science Institute Caltech/IPACMail Code 100-221200 E.California Blvd.PasadenaCA91125USA Grand Pra Observatory Switzerland Department of Physics Washington UniversitySt.LouisMO 63130.USA Department of Physics and Astronomy Swarthmore CollegeSwarthmorePA 19081USA Instituto de Astrofísica de Canarias(IAC) E-38205 La Laguna.TenerifeSpain Departamento de Astrofísica Universidad de La LagunaSpain Dept.of Astronomy and Space Sciences Ankara UniversityTandogan 06100AnkaraTurkey Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Urumqi No.1 Senior High School Urumqi 830002China Lijiang Gemini Observatory Lijiang 674199China

We report the confirmation of a sub-Saturn-size exoplanet,TOI-1194 b,with a mass of about 0.456+0.055-0.051M_(J),and a very low mass companion star with a mass of about 96.5±1.5 MJ,TOI-1251 *** candidates provided by the Transiting Exoplanet Survey Satellite(TESS)are suitable for further follow-up observations by ground-based telescopes with small and medium *** analysis is performed based on data from several telescopes worldwide,including telescopes in the Sino-German multiband photometric campaign,which aimed at confirming TESS Objects of Interest(TOIs)using ground-based small-aperture and medium-aperture telescopes,especially for long-period ***-1194 b is confirmed based on the consistent periodic transit depths from the multiband photometric *** measure an orbital period of 2.310644±0.000001 days,the radius is 0.767+0.045-0.041RJ and the amplitude of the RV curve is 69.4_(-7.3)^(+7.9)m s^(-1).TOI-1251 B is confirmed based on the multiband photometric and high-resolution spectroscopic data,whose orbital period is 5.963054+0.000002-0.000001days,radius is 0.947+0.035-0.033 R_(J) and amplitude of the RV curve is 9849_(-40)^(+42)ms^(-1).

关键词： planets and satellites fundamental parameters-planets and satellites gaseous planets-stars fundamental parameters-stars low-mass-methods data analysis-techniques photometric-techniques spectroscopic

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Dynamics and cytokinic regulation of immune cell infiltration in genetically engineered mouse models of pancreatic cancer dictate the sensitivity to immunotherapy

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Cancer Communications 2024年第1期44卷 178-182页

作者： Okan Safak Shenghan Wang Carmen Mota Reyes Ibrahim Halil Gürcinar Sergey Tokalov Nedim Can Cevik Kivanc Görgülü Bengi Su yilmaz Emre Erdogan Linhan Ye Qiaolin Li Elif Arik Sever SamedÖzer Güldal Süyen Helmut Friess Güralp Onur Ceyhan Rouzanna Istvanffy Hana Algül Ihsan Ekin Demir Department of Surgery Klinikum rechts der IsarTechnical University of MunichSchool of MedicineMunichBavariaGermany Department of General Surgery HPB-UnitSchool of MedicineAcibadem Mehmet Ali Aydinlar UniversityIstanbulIstanbulTurkey Comprehensive Cancer Center München Klinikum rechts der IsarTechnical University of MunichSchool of MedicineMunichBavariaGermany Department of Hematology Oncology and Tumor ImmunologyCharitéUniversity Medicine BerlinCampus Virchow ClinicBerlinBerlinGermany Graduate School of Health Sciences Acibadem Mehmet Ali Aydinlar UniversityIstanbulIstanbulTurkey Department of Physiology Acibadem Mehmet Ali Aydinlar UniversityIstanbulIstanbulTurkey Else Kröner Clinician Scientist Professorship for Translational Pancreatic Surgery MunichGermany Neural Influences in Cancer(NIC)International Research Consortium MunichGermany

Dear Editor,Targeting the immune compartment in pancreatic duc-tal adenocarcinoma(PDAC)holds promise for prognostic improvement,yet our knowledge on the spatial and tem-poral dynamics and the molecular modulators of t... 详细信息

关键词： immune adenocarcinoma immunotherapy

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Effect of layer thickness on the flexural property and microstructure of 3D-printed rhomboid polymer-reinforced cemented tailing composites

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International Journal of Minerals,Metallurgy and Materials 2023年第2期30卷 236-249页

作者： Ziyue Zhao Shuai Cao Erol yilmaz State Key Laboratory of High-Efficient Mining and Safety of Metal Mines of Ministry of Education University of Science and Technology BeijingBeijing 100083China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China Department of Civil Engineering Geotechnical DivisionRecep Tayyip Erdoğan UniversityFenerRize TR53100Turkey

For mines with poor ore bodies and surrounding rocks,the general mining method does not allow the ore to be extracted from underground safely and *** these mines,the downward layered filling mining technique is undoubtedly the most suitable mining *** downward filling mining technique may eliminate the troubles relating to poor ore deposit conditions,such as production safety,ore loss rate,and depletion ***,in this technique,the safety of the artificial roof of the next stratum is of paramount *** tailings backfilling(CTB)that is not sufficiently cemented and causes collapses could threaten ore *** paper explores a diamond-shaped composite structure to mimic the stability of a glued false roof in an actual infill mine based on the recently emerged three-dimensional(3D)printing *** means such as three-point bending and digital image correlation(DIC)techniques were used to explore the flexural characteristics of 3D construction specimens and CTB combinations with different cement/tailings weight ratios at diverse layer *** results show that the 3D structure with a 14-mm ply height and CTB has strong flexural characteristics,with a maximum deflection value of 30.1 mm,while the 3D-printed rhomboid polymer(3D-PRP)structure with a 26-mm ply height is slightly worse in terms of flexural strength characteristics,but it has a higher maximum flexural strength of 2.83 MPa.A combination of 3D structure and CTB has more unique mechanical properties than CTB *** research work offers practical knowledge on the artificial roof performance of the downward layered filling mining technique and builds a scientific knowledge base regarding the successful application of CTB material in mines.

关键词： tailings cemented fills 3D printed rhomboidal polymer three-point bending test digital image correlation

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