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Performance of Bacillus tropicus on Mechanical,Durable and Crack Remediation Properties in Sustainable Vermiculite Concrete

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Journal of Bionic Engineering 2024年第4期21卷 1987-1999页

作者： Anbazhagan Rajesh Venkatesh sri hariny Arunachalam Sumathi School of Civil Engineering SASTRA Deemed to be UniversityThirumalaisamudramThanjavurTamilnadu613401India

Sustainable cement-based concrete materials are primarily used for construction,among which vermiculite as lightweight fine aggregate gains more future development ***,a bacterial solution was sprayed over vermiculite and wrapped using calcium sulphoaluminate(CSA)cement to replace with fine aggregate in ***,based on a preliminary test on compressive strength results,10%of Ground Granulated Blast Furnace Slag(GGBS)and a healing solution proportion of 9:1 was selected for preparing self-healing *** fine aggregate was replaced in concrete using vermiculite in 0%,5%,10%and 15%and the findings suggest that bacterial vermiculite replacement should be at most 5%to achieve better results in strength and durable *** strength enhancement observed for compressive strength,strength regain,split tensile strength,flexural strength,and ultrasonic pulse velocity were 29.22%,45.5%,34.02%,28.03%and 41.4%*** crack healing at 7,14 and 28 days of BIVC was 38.23%,58.82%and 79.41%,which is 3–4%lower than internal crack *** analysis by Scanning Electron Microscopy(SEM),X-Ray Diffractometer(XRD),and Energy Dispersive Spectroscopy(EDS)reveals the existence of calcite,and it was formed due to the bio-mineral action of bacteria with available nutrients in sustainable concrete.

关键词： Bacillus tropicus Vermiculite Ground granulated blast furnace slag Mechanical properties Durable properties Crack healing Microstructural characterization

hepatitis B virus genotypes in precision medicine of hepatitis Brelated hepatocellular carcinoma:Where we are now

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World Journal of Gastrointestinal Oncology 2024年第4期16卷 1097-1103页

作者： Caecilia h C Sukowati sri Jayanti Turyadi Turyadi David h Muljono Claudio Tiribelli Eijkman Research Center for Molecular Biology Research Organization for HealthNational Research and Innovation Agency of IndonesiaJakarta 10340Indonesia Liver Cancer Unit Fondazione Italiana Fegato ONLUSTrieste 34149Italy Faculty of Medicine Hasanuddin UniversityMakassar 90245South SulawesiIndonesia Faculty of Medicine and health University of SydneySydney 2050Australia

hepatitis B virus(hBV)infection is a major player in chronic hepatitis B that may lead to the development of hepatocellular carcinoma(hCC).hBV genetics are diverse where it is classified into at least 9 genotypes(A to I)and 1 putative genotype(J),each with specific geographical distribution and possible different clinical outcomes in the *** diversity may be associated with the precision medicine for hBV-related hCC and the success of therapeutical approaches against hCC,related to different pathogenicity of the virus and host *** Editorial discusses recent updates on whether the classification of hBV genetic diversity is still valid in terms of viral oncogenicity to the hCC and its precision medicine,in addition to the recent advances in cellular and molecular biology technologies.

关键词： hepatitis B virus hepatocellular carcinoma Genotypes Pathogenesis Precision medicine

Unraveling the role of dual Ti/Mg metals on the ignition and combustion behavior of hTPB-boron-based fuel

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Defence Technology（防务技术） 2024年第2期32卷 134-143页

作者： Arijit Debnath Yash Pal sri Nithya Mahottamananda Djalal Trache School of Aeronautical Science Hindustan Institute of Technology and ScienceChennai 603103India Department of Aerospace Engineering B S Abdur Rahman Crescent Institute of Science and TechnologyChennai 600048India Energetic Materials Laboratory(EMLab) Teaching and Research Unit of Energetic ProcessesEcole Militaire PolytechniqueBP 17Bordj El-Bahri16046AlgiersAlgeria

Metal additives play an essential role in explosive and propellant formulations. Boron(B) is widely used in propellant applications owing to its high energetic content. The addition of B to explosives and propellants increases their energy density, making them more efficient and powerful. Nevertheless, B forms oxide layers on its surface during combustion, slowing down the combustion rate and reducing rocket motor efficiency. To overcome this issue, other metal additives such as aluminum(Al), magnesium(Mg),and titanium(Ti) are revealed to be effective in boosting the combustion rate of propellants. These additives may improve the combustion rate and therefore enhance the rocket motor’s performance. The present study focused on preparing and investigating the ignition and combustion behavior of pure hydroxyl-terminated polybutadiene(hTPB)-B fuel supplemented with nano-titanium and nanomagnesium. The burn rates of hTPB-B fuel samples were evaluated on the opposed flow burner(OFB)under a gaseous oxygen oxidizer, for which the mass flux ranges from 22 kg/(m^(2)·s) to 86 kg/(m^(2)·s). The addition of Ti and Mg exhibited higher regression rates, which were attributed to the improved oxidation reaction of B due to the synergetic metal combustion effect. The possible combustion/oxidation reaction mechanism of B-Mg and B-Ti by heating the fuel samples at 900℃ and 1100℃ was also examined in a Nabertherm burnout furnace under an oxygen atmosphere. The post-combustion products were collected and further subjected to X-ray diffraction(XRD) and field emission scanning electron microscopy(FE-SEM) analyses to inspect the combustion behavior of B-Ti and B-Mg. It has been observed that the B oxide layer at the interface between B-Ti(B-Mg) is removed at lower temperatures, hence facilitating oxygen transfer from the surroundings to the core B. Additionally, Ti and Mg decreased the ignition delay time of B, which improved its combustion performance.

关键词： Boron B_(2)O_(3) Opposed flow burner Combustion Magnesium

KL-SG high-Speed Rail-a catalyst for national economic development sri Viknesh Permalu and Karthigesu Nagarajoo

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Railway Sciences 2024年第3期3卷 265-278页

作者： sri Viknesh Permalu Karthigesu Nagarajoo Department of Transportation Engineering Technology Fakulti Teknologi KejuruteraanUniversiti Tun Hussein Omn MalaysiaPagohMalaysia

Purpose-In an increasingly interconnected world,transportation infrastructure has emerged as a critical determinant of economic growth and global ***-speed rail(hSR),characterized by its exceptional speed and efficiency,has garnered widespread attention as a transformative mode of transportation that transcends borders and fosters economic *** Kuala Lumpur-Singapore(KL-SG)hSR project stands as a prominent exemplar of this paradigm,symbolizing the potential of hSR to serve as a catalyst for national economic ***/methodologylapproach-This paper is prepared to provide an insight into the benefits and advantages of hSR based on proven case studies and references from global hSRs,including China,Spain,France and ***-The findings that have been obtained focus on enhanced connectivity and accessibility,attracting foreign direct investment,revitalizing regional economies,urban development and city regeneration,boosting tourism and cultural exchange,human capital development,regionai integration and environmental and sustainability ***/value-The KL-SG hSR,linking Kuala Lumpur and Singapore,epitomizes the potential for hSR to be a transformative agent in the realm of economic *** project encapsulates the aspirations of two dynamic Southeast Asian economies,united in their pursuit of sustainable growth,enhanced connectivity and global *** scrutinizing the KLSG high-Speed Rail through the lens of economic benchmarking,a deeper understanding emerges of how such projects can drive progress in areas such as cross-border trade,tourism,urban development and technological innovation.

关键词： high-speed rail Transportation Railways Sustainable mobility Socioeconomic development Technology Papertype Case study

Evaluating Ignition and Combustion Performance with Al-Metal- Organic Frameworks and Nano-Aluminum in hTPB Fuel

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火炸药学报 2024年第5期47卷 413-421,I0003页

作者： sri Nithya Mahottamananda Yash Pal Yarravarapu Sai sriram Subha S Djalal Trache Department of Aerospace Engineering B S Abdur Rahman CrescentInstitute of Science and TechnologyChennai-600048India School of Aeronautical Science Hindustan Institute of Technologyand ScienceChennai-603103India Energetic Materials Laboratory(EMLab) Teaching and ResearchUnit of Energetic ProcessesEcole Militaire PolytechniqueBP 17Bordj El-Bahri16046AlgiersAlgeria

Incorporating aluminum metal-organic frameworks(Al-MOFs)as energetic additives for solid fuels presents a promising avenue for enhancing combustion *** study explores the potential benefits of Al-MOF(MIL-53(Al))energetic additive on the combustion performance of hydroxyl-terminated polybutadiene(hTPB)*** hTPB-MOF fuel samples were manufactured using the vacuum-casting technique,followed by a comprehensive evaluation of their ignition and combustion properties using an opposed flow burner(OFB)setup utilizing gaseous oxygen as an *** gauge the effectiveness of Al-MOFs as fuel additives,their impact is compared with that of nano-aluminum(nAl),another traditional additive in hTPB *** results indicate that the addition of 15%(mass fraction)nAl into hTPB resulted in the shortest ignition delay time(136 ms),demonstrating improved ignition performance compared to pure hTPB(273 ms).The incorporation of Al-MOF in hTPB also reduced ignition delay times to 227 ms and 189 ms,***,under high oxidizer mass flux conditions(79—81 kg/(m^(2)s)),hTPB fuel with 15%nAl exhibited a substantial 83.2%increase in regression rate compared to the baseline hTPB fuel,highlighting the positive influence of nAl on combustion *** contrast,hTPB-MOF with a 15%Al-MOF additive showed a 32.7%increase in regression rate compared to pure *** results suggest that hTPB-nAl outperforms hTPB-MOF in terms of regression rates,indicating a more vigorous and rapid burning behavior.

关键词： ignition combustion enhancement MOF hTPB regression rate

Simulation and experimentation of Propeller-Savonius turbine tested underwater surface

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CLEAN ENERGY 2024年第3期8卷 20-33页

作者： Wuryanti, sri Sasono, Teguh Manunggal, Bambang P. Mursanto, Wahyu B. Sugianto Politekn Negeri Bandung Politeknik Negeri Bandung Bandung Indonesia Politekn Negeri Padang Dept Mech Engn Padang Indonesia

Indonesia's vast maritime territory offers a unique opportunity for harnessing the potential Energy of seawater currents. This study explores the effectiveness of a combined Savonius and propeller-type turbine system. The Savonius turbine, known for its efficiency in capturing ocean currents due to its large sweep area, is combined with a propeller-type turbine to enhance rotational speed and power generation. A novel approach is employed to induce turbulence and optimize energy extraction, first channeling water through the propeller turbine and then into the Savonius turbine. A comprehensive investigation is conducted through simulations and experimental tests within a controlled tunnel environment. The study explores the performance of two-bladed and three-bladed Propeller-Savonius configurations at varying inlet water velocities (0.1, 0.3, 0.6 and 1.0 m/s). The simulation incorporates a turbulence model with 5% intensity and a hydraulic diameter of 0.216 m. Results indicate that the proposed configuration achieves a maximum power output of 2.0293 W with an impressive efficiency of 63.339% in simulation. Concurrently, experimental testing yields a peak efficiency of 61.335% and turbine power of 0.3951 W. The findings demonstrate the feasibility of the combined turbine system and highlight the importance of turbulence in optimizing energy extraction from seawater currents. This research contributes valuable insights into the design and performance of hybrid turbines for harnessing oceanic Energy, emphasizing the potential for sustainable power generation in maritime regions. The methodology and results presented herein offer a foundation for further exploration and refinement of seawater current energy conversion technologies. The study combines a Savonius turbine and a propeller turbine to enhance rotational speed and power generation. CFD simulations and experiments document performance at different water velocities. The findings show that this system is promisi

关键词： hydro-turbine propeller -Savonius renewable energy water WIND TURBINE PERFORMANCE BLADES CFD RATIO

Oketani massage with jasmine oil improves breast milk production on postpartum days 1-3

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Journal of Integrative Nursing 2024年第1期6卷 35-40页

作者： Ni Made Ratih Comala DEWI Made Ririn sri WULANDARI Yupin AUNGSUROCh Department of Nursing Bali Mandara HospitalBaliIndonesia Bachelor Program of Nursing Faculty of MedicineUniversitas Pendidikan GaneshaBaliIndonesia Nursing Management Faculty of NursingChulalongkorn UniversityBangkokThailand

Objective:This study aimed to determine the effect of Oketani massage with jasmine oil on improving breast milk production on days *** and Methods:This preexperimental one-group pretest-posttest design was conducted with 44 eligible respondents,selected using an incidental sampling *** massage with jasmine oil was conducted once a day for 3 consecutive days.A total of 44 respondents were selected with incidental *** breast milk production was observed through the frequency of baby urination in 24 h,the frequency of baby defecation in 24 h,the baby’s weight,and the length of time the baby slept or remained calm after ***:Results showed that Oketani massage using jasmine oil impacted on increasing breast milk production in postpartum on days 1-3(Z=6.633,P=0.000).The baby’s weight in 3 days was increased after intervention compared with intervention before(2858.25±180.62 g vs.2881.66±180.96 g,t=55.33,P=0.000),the baby’s urination frequency was increased after intervention(4.55±0.50 vs.7.20±0.70,t=17.87,P=0.000),the breastfeeding frequency has decreased(10.27±1.42 vs.8.82±0.82,t=6.94,P=0.000),and the time of baby’s sleeping or calming state has increased(5.14±6.46 h vs.8.48±10.24 h,t=2.11,P=0.041).Conclusion:Oketani massage combined with jasmine oil has been shown to be effective on improving breast milk production on days 1-3.

关键词： Exclusive breastfeeding Oketani massage postpartum

Praseodymium metal nanorods as a 5-fluorouracil carrier

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Journal of Rare Earths 2024年第7期42卷 1328-1336,I0005页

作者： Varnitha Manikantan Govindaraj sri Varalakshmi Ujma Ashapak Tamboli Archana Sumohan Pillai Aleyamma Alexander Anushka Lucas Bose Allben Akash Israel V.M.V.Enoch Centre for Nanoscience and Genomics Karunya Institute of Technology and Sciences(Deemed University)Coimbatore641114Tamil NaduIndia Department of Applied Chemistry Karunya Institute of Technology and Sciences(Deemed University)Coimbatore641114Tamil NaduIndia

Interest in metal nanoparticles as nanoscale drug-carrying vehicles has been *** such an aspect,lanthanide metal nanoparticles are particularly ***,we report praseodymium nanoparticles as a novel anticancer therapeutic transporting *** material was made as a composite with the supramolecular host polymer,poly-β-*** praseodymium nanorods were characterized using standard analytical techniques,including X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),and thermogravimetric analysis(TGA).In addition,they were imaged using transmission electron *** nanostructures are a long rod-shaped material with 2.0±0.1μm in length and 230±10 nm in *** material shows a saturation magnetization value above 30 emu/g with a coercivity value of 130 *** nanocarrier is freighted with the drug 5-fluorouracil,and the encapsulation efficiency is 76.09%.The drug release is continuous from the nanocarrier(polymer-containing praseodymium nanoparticles)and proceeds for above 250 *** in vitro cytotoxicities of the blank nanocarrier and the 5-fluorouracil-loaded one are deduced by testing them on MCF-7 and Vero(non-cancerous)cell *** cytotoxicity on the cancerous cell lines is observed,whereas the non-cancerous cells are *** IC_(50)values on the cell lines are reported.

关键词： Metal nanoparticles Praseodymium Poly-cyclodextrin Drug delivery Anticancer activity Rare earths

Finite Deformation, Finite Strain Nonlinear Dynamics and Dynamic Bifurcation in TVE Solids with Rheology

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Applied Mathematics 2024年第1期15卷 108-168页

作者： Karan S. Surana sri Sai Charan Mathi Department of Mechanical Engineering University of Kansas Lawrence US

This paper presents a mathematical model consisting of conservation and balance laws (CBL) of classical continuum mechanics (CCM) and ordered rate constitutive theories in Lagrangian description derived using entropy inequality and the representation theorem for thermoviscoelastic solids (TVES) with rheology. The CBL and the constitutive theories take into account finite deformation and finite strain deformation physics and are based on contravariant deviatoric second Piola-Kirchhoff stress tensor and its work conjugate covariant Green’s strain tensor and their material derivatives of up to order m and n respectively. All published works on nonlinear dynamics of TVES with rheology are mostly based on phenomenological mathematical models. In rare instances, some aspects of CBL are used but are incorrectly altered to obtain mass, stiffness and damping matrices using space-time decoupled approaches. In the work presented in this paper, we show that this is not possible using CBL of CCM for TVES with rheology. Thus, the mathematical models used currently in the published works are not the correct description of the physics of nonlinear dynamics of TVES with rheology. The mathematical model used in the present work is strictly based on the CBL of CCM and is thermodynamically and mathematically consistent and the space-time coupled finite element methodology used in this work is unconditionally stable and provides solutions with desired accuracy and is ideally suited for nonlinear dynamics of TVES with memory. The work in this paper is the first presentation of a mathematical model strictly based on CBL of CCM and the solution of the mathematical model is obtained using unconditionally stable space-time coupled computational methodology that provides control over the errors in the evolution. Both space-time coupled and space-time decoupled finite element formulations are considered for obtaining solutions of the IVPs described by the mathematical model and are presented i

关键词： Thermoviscoelasticity Rheology Memory Finite Strain Finite Deformation Nonlinear Dynamics Dynamic Bifurcation Ordered Rate Theories