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Sequential alkaline-organic acid leaching process to enhance the recovery of rare earth elements from Indonesian coal fly ash

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Journal of Rare Earths 2024年第7期42卷 1366-1374,I0006页

作者： Widya Rosita Indra Perdana I made Bendiyasa Ferian Anggara Himawan Tri Bayu Murti Petrus Agus Prasetya Isyatun Rodliyah Department of Nuclear Engineering and Engineering Physics Faculty of EngineeringUniversitas Gadjah MadaJl Grafika No.2Yogyakarta55281Indonesia Department of Chemical Engineering Faculty of EngineeringUniversitas Gadjah MadaJl Grafika No.2Yogyakarta55281Indonesia Department of Geological Engineering Faculty of EngineeringUniversitas Gadjah MadaJl Grafika No.2Yogyakarta55281Indonesia Unconventional Geo-resources Research Group Faculty of EngineeringUniversitas Gadjah MadaJl Grafika No.2Yogyakarta55281Indonesia Center for Testing of Mineral and Coal Tekmira-Directorate General of Mineral and Coal-Ministry of Energy and Mineral Resources Jl.Jend.Sudirman No.623Wr.MuncangKec.Bandung KulonKota BandungJawa Barat40211Indonesia

In this decade,coal fly ash(CFA)is considered a potential secondary source of rare earth elements(REEs).However,most REEs in coal fly ash are encapsulated in aluminosilicate glass,making it challenging to recover them through acid *** this study,a sequential alkaline-organic acid leaching was developed for the recovery of REEs from *** effect of alkaline leaching using NaOH solution on the destructive ability of aluminosilicate glass,as well as the mineralogy and morphology changes of the resulting coal fly ash,was first ***,the effectiveness of alkaline leaching on the recovery ability of REEs through organic acid leaching was *** results show that the maximum leaching efficiency for Si and Al,which was obtained at the optimum alkaline leaching conditions,namely NaOH concentration of 10 mol/L,reaction temperature of 65℃,liquid/solid(L/S)ratio of 10 mL/g,and reaction time of 90 min,is 28%and 32%,*** digestion reaction with NaOH lixiviants also causes coal fly ash to become more porous,making it advantageous in the organic acid-leaching process at the REEs recovery *** utilization of the desilicated residue produced from the digestion process in acid leaching effectively increases the overall REEs recovery from 32.2%to 77.6%.

关键词： Rare earth elements Alkaline Organic acid Coal fly ash

Peer pressure and academic stress among junior high school students:a cross-sectional study

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Frontiers of Nursing 2024年第2期11卷 191-199页

作者： Rika Sarfika I made MohYanuar Saifudin Hema Malini Nursyirwan Effendi Bunga Permata Wenny Mental Health and Community Department Faculty of NursingUniversitas AndalasPadangWest Sumatra 25163Indonesia Department of Medicine and Health Faculty of MedicinePublic Healthand NursingUniversitas Gadjah MadaYogyakarta 55281Indonesia Department of Medical Surgical Faculty of NursingUniversitas AndalasPadangWest Sumatra 25163Indonesia Anthropology Department Faculty of Social and Political SciencesUniversitas AndalasPadangWest Sumatra 25163Indonesia

Objective:The objective of the study was to explore the connection between peer pressure and academic stress among junior high school ***:This descriptive correlational study was conducted to investigate the link between perceived peer pressure and academic *** study involved a total of 525 adolescents,aged 14-19 years,drawn from 6 public junior high schools(PJHS)in Padang,Indonesia,using purposive *** stress and perceived peer pressure were assessed using the Educational Stress Scale for Adolescents(ESSA)and the Perceived Peer Pressure Scale(PPPS).Results:The findings indicated significant variations in stress levels among students in different grade levels(7th,8th,and 9th grades)(P0.05).Additionally,there was a positive correlation observed between perceived peer pressure and academic stress(r=0.14,P<0.05).Furthermore,multiple regression analyses,incorporating demographic variables and perceived peer pressure as independent factors,yielded statistically significant results(adjusted R^(2)=0.082,F=4.33,P<0.001).Notably,peer pressure had a direct impact on academic stress among adolescents,with class level and parents’educational background mediating the relationship between academic stress and adolescent behavioral ***:These findings underscore the importance of addressing both external and internal factors at the individual,family,school,and societal levels to enhance adolescents’psychological resilience and mitigate problem behaviors.

关键词： academic stress adolescents behavioral problem Indonesia peer pressure students

Biological perspectives in geotechnics:Application and monitoring

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第7期16卷 2854-2878页

作者： Partha Narayan Mishra Surabhi Jain Thierry bore Ilhan Chang Yeong-Man Kwon Yijie Wang Hirak Ranjan Dash Ashutosh Kumar Satyam Tiwari Ningjun Jiang Sarat Kumar Das Alexander Scheuermann Department of Civil Engineering Indian Institute of Technology KanpurKanpur208016India School of Civil Engineering University of QueenslandSt LuciaQLD4072Australia Department of Civil Engineering Indian Institute of Technology DhanbadDhanbad826004India Department of Civil System Engineering Ajou UniversitySuwon-si16499Republic of Korea School of Engineering and IT University of New South WalesCanberraACT2600Australia Department of Civil and Environmental Engineering Northwestern UniversityEvanstonIL60208USA Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong KongChina National Forensic Sciences University New Delhi110085India Southeast University Nanjing211189China

This paper builds on exploring the applications of biomediated pathways to solve geotechnical ***,the state of the art of biological remediation strategies including microbial remediation and phytoremediation have been introduced and critically reviewed in the context of decontaminating the ***,biopolymerisation,biomineralisation and bioneutralisation processes have been depicted with a special emphasis on the applications including but not limited to soil stabilisation,soil erosion prevention,anti-desertification and pH *** of these methods have their own limitations and bottlenecks while scaling up,and these challenges have been summarised and some possible paths to overcome the challenges have also been *** state of the art of electromagnetic(EM)monitoring methods to capture the effects of biomediation on spatio-temporal soil properties are then highlighted as a non-invasive and rapid pathway to track the progress of biomediated soil ***,each of the technologies discussed have been evaluated for their maturity level using the principles of technology readiness level(TRL).A majority of the technologies amounting to around 77%are still in the TRL 4e7,*** the valley of *** is thus evident that development of these technologies needs to be supported with appropriate funding for improving their maturity to a level of industrial deployment.

关键词： Biogeotechnics Bioremediation Phytoremediation Biopolymers Biomineralisation Electromagnetic(EM)methods technology readiness level(TRL)

Breast cancer awareness in reproductive women in the low-and middle-income countries:a scoping review

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Frontiers of Nursing 2024年第2期11卷 139-151页

作者： made Satya Nugraha Gautama Saranya Pimolkatekul Nguyen Ngoc Nhat Thanh Department of Nursing Faculty of MedicineUniversitas Pendidikan GaneshaBali 81116Indonesia School of Nursing College of NursingTaipei Medical UniversityTaipeiTaiwan 110China Global Health and Development Program College of Public HealthTaipei Medical UniversityTaipeiTaiwan 110China

Objective:This study aimed to assess breast cancer(BC)awareness among reproductive women in low-and middle-income countries(LMICs),identify influencing factors,and propose feasible interventions or ***:We followed a 5-step process using a modified version of Arksey and O’Malley framework methodology.A comprehensive search was conducted on the Embase,PubMed,and CINAHL electronic databases for literature published within 10 years(from 2012 to 2022).Results:Thirty-three papers published between 2012 and 2020,spanning 18 countries,were *** these,45.6%described a good level of knowledge,while 24.2%reported that women at reproductive ages had good *** influencing factors were identified in 3 categories:socio-demographic(family history,personal history,marital status,age,religion,income status,living place,and occupation),personal(self-efficacy,education,and perceived level),and external(advertisements promoting awareness).Educational programs were recommended in most(>72%)of the included ***:While most studies reported high levels of knowledge and awareness,some found low prevalence among certain *** affecting knowledge and awareness were classified into socio-demographic,personal,and external categories,with socio-demographic factors such as age,education,income,and marital status being the most frequently *** studies recommended implementing educational programs,health prevention strategies,and social interventions to increase BC knowledge and awareness.

关键词： awareness breast cancer low-and middle-income countries reproductive women scoping review

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超越时空的永恒感法国UMA酒庄

室内设计与装修 2024年第8期 74-79页

作者： [法国]Agence Clausel-borel architecte Nicolas bore(摄影) coco(编译) Agence Clausel-borel architecte

UMA酒庄位于法国圣卢峰原产地保护区的中心地带,周围环绕着无尽的葡萄园和灌木林,感觉就像一个超越时间的地方。酒庄每天沐浴在闪烁的、不断变化的阳光里,随着四季的更迭,时时都能看到迷人而又不同的风景。当被这片壮丽的风景所环绕,人... 详细信息

UMA酒庄位于法国圣卢峰原产地保护区的中心地带,周围环绕着无尽的葡萄园和灌木林,感觉就像一个超越时间的地方。酒庄每天沐浴在闪烁的、不断变化的阳光里,随着四季的更迭,时时都能看到迷人而又不同的风景。当被这片壮丽的风景所环绕,人们顿时会感到远离城市的轻松。庄园主要由简单坚固的石头建筑构成,这也是该地区典型的建筑风格。建于19世纪末的宏伟建筑最初是作为蚕场使用,双U形平面图通向2个庭院。UMA酒庄在其历史进程中经过改造并分为2个酒庄,如今又合并在一起。

关键词：建筑风格灌木林超越时空酒庄平面图葡萄园历史进程 UMA

Sternocleidomastoid flap for reconstruction of tongue small cell carcinoma: A case report

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World Journal of Surgical Procedures 2024年第2期14卷 8-14页

作者： Hendry Irawan made Bagus Sastrapramaya Bharata Surgical Oncology Division Department of SurgeryMedical Faculty Universitas UdayanaDenpasar 80113BaliIndonesia General Surgery Resident Department of SurgeryMedical Faculty Universitas UdayanaProf.Dr.I.G.N.G.Ngoerah General HospitalDenpasar 80113BaliIndonesia

BACKGROUND The management of tongue carcinoma is excision and radical neck dissection followed with *** is a case report of a patient with tongue squamous cell carcinoma(SCC)who underwent the procedure with sternocleidomastoid(SCM)flap *** SUMMARY A 52-year-old woman without smoking history complained tongue ulcer since 3 years *** on the histopathological examination,the patient was diagnosed with T2N2M0 right tongue SCC and underwent wide excision of tumor;right mandibular;neck dissection and were reconstructed with SCM *** SCC of the tongue requires wide excision and dissection of the neck and mandible if infiltration into the surrounding lymph nodes has been *** SCM flap reconstruction could be used post-surgery.

关键词： Sternocleidomastoid flap Neck dissection Mandibular dissection Squamous cell carcinoma of the tongue Case report

Allotopic expression of mitochondrial genes:Basic strategy and progress

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Genes & Diseases 2020年第4期7卷 578-584页

作者： I.made Artika Department of Biochemistry Faculty of Mathematics and Natural SciencesBogor Agricultural UniversityDarmaga CampusBogor 16680Indonesia Eijkman Institute for Molecular Biology Jalan Diponegoro 69Jakarta10430Indonesia

Allotopic expression of mitochondrial genes is a deliberate functional relocation of mitochondrial genes into the nucleus followed by import of the gene-encoded polypeptide from the cytoplasm into the *** successful allotopic expression of a mitochondrial gene,several key aspects must be *** include the different codon dictionary used by the mitochondrial and nuclear genomes,different codon preferences between mitochondrial and nuclear-cytosolic translation systems,and the provision of an import signal to ensure that the newly translated protein in the cytosol is successfully imported into *** allotopic expression strategy was first developed in yeast,a useful model organism for studying human and other eukaryotic ***,a number of mitochondrial genes have been successfully recoded and nuclearly expressed in yeast and human *** addition to its use in evolutionary and molecular biology studies,the allotopic expression strategy has been developed as a potential approach to treat mitochondrial genetic *** progress has been recently achieved,and the development of this technique for therapy of the mitochondrial disease Leber’s hereditary optic neuropathy(LHON)has entered phase III clinical ***,a number of challenges remain to be overcome to accelerate the successful application of this *** include improvement of nuclear gene expression,import into mitochondria,processing,and functional integration of the allotopically expressed polypeptides into mitochondrial protein *** review discusses the current basic strategy,progress,challenges,and prospects of the allotopic expression strategy for mitochondrial genes.

关键词： Allotopic expression Gene therapy Mitochondria Mitochondrial gene Protein targeting

Salinity effects on soil shrinkage characteristic curves of fine-grained geomaterials

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Journal of Rock Mechanics and Geotechnical Engineering 2019年第1期11卷 181-191页

作者： Partha Narayan Mishra Alexander Scheuermann Thierry bore Ling Li School of Civil Engineering University of Queensland

Fine-grained clayey soils are prone to substantial volume changes during desiccation in response to the dynamics of their moisture regime,and are of critical importance in several geotechnical and geoenvironmental engineering applications. As such, the complex interactions between the fraction of soil solids and the ionic pore fluid play a critical role in governing such volume changes, and have been the focus in studies dealing with marine geotechnology, mine-tailing ponds, engineered barrier systems, *** this in mind, the present investigation evaluates the volume changes and accompanying densification from a saturated slurry state to a constant volume state of a reference fine-grained geomaterial,kaolin, subjected to evaporative dewatering. For this purpose, several parametric studies involving determination of soil shrinkage characteristic curves(SSCCs) of kaolin under the influence of varied salt constituents and concentrations of pore fluid are performed. Furthermore, a critical assessment of SSCCs depicting progressive shrinkage and volume change behaviour of geomaterials is provided, followed by the analysis of experimentally obtained SSCCs of the kaolin to explore the impacts of pore fluid ***, the SSCCs are parameterised with a predictive model and the fitting parameters are used to quantitatively demonstrate the salinity-dependent volume change response of a representative finegrained porous system.

关键词： Kaolin Pore fluid salinity Soil shrinkage curves Pore space dynamics Geotechnical engineering

Characterisation of pore fluid salinity dependent evaporative dewatering of kaolin using dielectric spectroscopy

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Journal of Rock Mechanics and Geotechnical Engineering 2020年第1期12卷 112-125页

作者： Partha Narayan Mishra Thierry bore Alexander Scheuermann Ling Li Geotechnical Engineering Centre School of Civil EngineeringThe University of QueenslandSt Lucia4072Australia School of Engineering Westiake UniversityHangzhouChina

Realising the importance of pore fluid salinity on the dewatering behaviour of fine-grained porous systems,the present study systematically investigated such impacts on temporal moisture dynamics of kaolin subjected to evaporative dewatering.A detailed discussion is provided pertaining to the background processes dictating evaporative dewatering response and corresponding alterations in the dielectric behaviour of *** dependent dielectric spectra of soil,which can be considered as the fingerprint of the transient changes in the condition of water phase within the pore system of the soil and associated densification,are monitored in real time during dewatering using an open-ended coaxial probe with a vector network *** spatial sensitivity of the coaxial probe has been quantified through layered media *** the results of volume change behaviour of the material along with its moisture loss response,the study characterised the hydro-mechanical response of the material from the windows of frequency dependent dielectric spectroscopy.

关键词： Kaolin Evaporative dewatering Pore fluid salinity Electromagnetic(EM)methods Vector network analyser Dielectric permittivity Sensitivity analysis