检索结果-南通市图书馆

Journal of Coastal Life Medicine 2016年第10期4卷 775-778页

作者： Tutik Murniasih Eka Ayu Indriany masteri yunovilsa putra Febriana Untari Research Center for Oceanography Indonesian Institute of Sciences Jl.Pasir Putih No.1Ancol TimurJakarta 14430Indonesia Faculty of Mathematics and Natural Sciences the State University of JakartaJl.Pemuda No.10Rawamangun.Jakarta TimurJakarta 13220Indonesia

Objective:To find a potent antibiotic producer from the sponge-associated bacteria as well as to profile the important ***:Sponge collection,bacteria isolation,extraction and characterization of potent active compounds were carried out for this ***:Approximately 59 single strains of bacteria were isolated from this *** 40 strains showed activity against Escerichia coli,Staphylococcus aureus and Vibrio *** chemical separation of the potent strain Bacterium ***.10%.2.1.1.b,using n-phase column chromatography revealed 7 active fractions(7,8,9,10,11,14 and 15).The gas chromatography-mass spectrometer analysis of Fraction 7 indicated some phenolic compounds including 4-nonylphenol,methyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate,acetosyringone,2,4-bis(1-phenylethyl)phenol,1,2-benzenedicarboxylic acid,mono(2-ethylhexyl)ester,tri(2-ethylhexyl)trimellitate and ***:Indeed,this is a preliminary information in profiling chemical substances,produced by Bacterium ***.10%.*** purification and structural chemical determination were needed to find a comprehensive result.

关键词： Antibacterial Sponge-associated bacteria Acanthella cavernosa Phenolic compounds

BPaL/BpaLM regimen:A bright future for drug-resistant tuberculosis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2024年第8期17卷 335-337页

作者： Oki Nugraha putra Telly Purnamasari Department of Clinical and Community Pharmacy Faculty of PharmacyHang Tuah UniversitySurabayaIndonesia Pre-Clinical and Clinical Studies National Research and Innovation AgencyBogorWest JavaIndonesia

Indonesia is one of the countries with the highest burden of tuberculosis and drug-resistant tuberculosis(DR-TB)across the *** on data from the World Health Organization(WHO)Global TB Report 2023,it is estimated that there are 10000 cases of DR-TB in ***,a novel antitubercular drug,has been implemented to treat DR-TB *** was administered either a shorter(9 months)or individualized treatment regimen(18 months).However,long treatment duration with various adverse events affects patient ***,a short treatment with less medication is urgently *** 2022,the WHO announced an alternative regimen-bedaquiline,pretomanid,linezolid,and moxifloxacin(BPaLM)to treat DR-TB patients for six months without resistance to fluoroquinolones[1].This recommendation is based on previous clinical trials of TB,Zenix TB,and *** introduction of BPaL and BPaLM provided a bright future for treating DR-TB patients.

关键词： tuberculosis drug treatment

The Effect of Uncaria gambir on Optical Properties and Thermal Stability of CNF/PVA Biocomposite Films

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2024年第9期12卷 1593-1603页

作者： Remon Lapisa Anna Niska Fauza Dieter Rahmadiawan Krismadinata Dori Yuvenda Randi Purnama putra Waskito Nandy putra Hairul Abral Mechanical Engineering Department Universitas Negeri PadangPadang25173Indonesia Centre for Energy and Power Electronics Research Universitas Negeri PadangPadang25173Indonesia Department of Mechanical Engineering National Cheng Kung University(NCKU)Tainan70101Taiwan Mechanical Engineering Department Universitas IndonesiaDepok16424Indonesia Mechanical Engineering Department Universitas AndalasPadang25163Indonesia

Cellulose-based film has gained popularity as an alternative to synthetic polymers due to its outstanding *** all types of cellulose materials available,cellulose nanofiber(CNF)has great potential to be utilized in a diverse range of applications,including as a film *** this study,CNF biocomposite film was prepared by using polyvinyl alcohol(PVA)as a matrix and Uncaria gambir extract as a *** study aims to investigate the effect of Uncaria gambir extract on the optical properties and thermal stability of the produced *** formation of the CNF biocomposite films was confirmed using Fourier Transform Infrared Spectroscopy,their transmittance characteristics were measured using UV-Vis spectroscopy and a transmittance meter,while their reflectance was determined using a reflectance *** results revealed that the addition of Uncaria gambir extract to the CNF biocomposite film improved its UV-shielding properties,as indicated by the lower percentage of transmittance in the visible region,10%–70%.In addition,its reflectance increased to 10.6%compared to the CNF film without the addition of Uncaria gambir ***,the thermal stability of the CNF biocomposite film with the addition of Uncaria gambir extract improved to around 400℃–500℃.In conclusion,the results showed that CNF biocomposite film prepared by adding Uncaria gambir extract can be a promising candidate for optical and thermal management materials.

关键词： Cellulose nanofiber biocomposite film optical properties Uncaria gambir thermal stability

Enhanced electromagnetic wave absorption via optical fiber-like PMMA@Ti_(3)C_(2)T_(x)@SiO_(2) composites with improved impedance matching

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第3期17卷 1676-1686页

作者： Huanhuan Niu Xuewen Jiang Wei Li Zhiyu Min Budi Riza putra Wulan Tri Wahyuni Hailong Wang Rui Zhang Bingbing Fan School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China School of Materials Science and Engineering Tongji UniversityShanghai 201804China Department of Materials and Earth Sciences Technical University of DarmstadtDarmstadt 64287Germany School of Material Science and Engineering Luoyang Institute of Science and TechnologyLuoyang 471023China Research Center for Metallurgy National Research and Innovation Agency(BRIN)PUSPIPTEK Gd.470South TangerangBanten 15315Indonesia Analytical Chemistry Division Department of ChemistryFaculty of Mathematics and Natural SciencesIPB UniversityWest Java 16680Indonesia

Ti_(3)C_(2)T_(x) nanosheets have attracted significant attention for their potential in electromagnetic wave absorption(EWA).However,their inherent self-stacking and exorbitant electrical conductivity inevitably lead to serious impedance mismatch,restricting their EWA ***,the optimization of impedance matching becomes *** this work,we developed polymethyl methacrylate(PMMA)@Ti_(3)C_(2)T_(x)@SiO_(2) composites with a sandwich-like core–shell structure by coating SiO_(2) on PMMA@Ti_(3)C_(2)T_(x).The results demonstrate that the superiority of the SiO_(2) layer in combination with PMMA@Ti_(3)C_(2)T_(x),outperforming other relative graded distribution structures and meeting the requirements of EWA *** resulting PMMA@Ti_(3)C_(2)T_(x)@SiO_(2) composites achieved a minimum reflection loss of-58.08 dB with a thickness of 1.9 mm,and an effective absorption bandwidth of 2.88 *** analysis revealed that the structural design of SiO_(2) layer not only optimized impedance matching,but also synergistically enhanced multiple loss mechanisms such as interfacial polarization and dipolar ***,this work provides valuable insights for the future preparation of high-performance electromagnetic wave absorbing Ti_(3)C_(2)T_(x)-based composites.

关键词： polymethyl methacrylate(PMMA)@Ti_(3)C_(2)T_(x)@SiO_(2)composites impedance match SiO_(2)layer optical fiber-like structure interfacial polarization and dipolar polarization

Analysis of the effect of the 2021 Semeru eruption on water vapor content and atmospheric particles using GNSS and remote sensing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geodesy and Geodynamics 2024年第1期15卷 33-41页

作者： Mokhamad Nur Cahyadi Arizal Bawasir Syachrul Arief Amien Widodo Meifal Rusli Deni Kusumawardani Yessi Rahmawati Ana Martina putra Maulida Hilda Lestiana Department of Geomatics Engineering Institut Teknologi Sepuluh NopemberSurabaya 60111Indonesia Research Center of Marine and Earth Science-Technology Directorate of Research and Community ServiceInstitut Teknologi Sepuluh NopemberSurabaya 60111Indonesia Geospatial Education and Training Division Geospatial Information Agency(BIG)Cibinong 16911Indonesia Department of Geophysics Engineering Institut Teknologi Sepuluh NopemberSurabaya 60111Indonesia Department of Mechanical Engineering Andalas UniversityPadang City 25175Indonesia Department of Economics Airlangga UniversitySurabaya 60286Indonesia Research Center for Geological Resources National Research and Innovation AgencyJakarta 10340Indonesia

Mount Semeru,an active volcano in East Java,Indonesia,erupted on December 4,2021,following extreme rainfall that caused an avalanche of hot pyroclastic flows and *** tropospheric conditions and dominant particle components in the atmosphere can be monitored using Global Navigation Satellite System(GNSS)technology and remote sensing *** signal propagation delay in Precise Point Positioning(PPP)processing can be used to determine Zenith Tropospheric Delay(ZTD)and Precipitable Water Vapor(PWV)variables so that atmospheric conditions can be *** addition,by using remote sensing satellite data,it is possible to obtain rainfall data with high temporal resolution as well as the dominant particle and gas content values during *** the eruption period,the high value of PWV was dominated by the high intensity of precipitation during the rainy *** rainfall before the eruption caused activity inside the mountain to increase,which occurred in avalanche type *** from that,the atmosphere around Semeru was also dominated by SO_(2)content,which spreaded for tens of ***_(2)content began to be detected significantly by remote sensing sensors on December 7,*** this study,deformation and atmospheric monitoring were also carried out using low-cost GNSS at the Semeru Monitoring Station on September 9-15,*** results of the ZTD and ZWD values show the dominance of the wet component,which is directly proportional to rainfall activity in this period.

关键词： Semeru GNSS Water vapor Rainfall SO_(2)

Spirooxindoles:Recent report of green synthesis approach

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Green Synthesis and Catalysis 2024年第1期5卷 1-13页

作者： Agus Rimus Liandi Antonius Herry Cahyana Diva Naufal Alfariza Rahma Nuraini Renita Wulan Sari Tio putra Wendari Department of Chemistry Faculty of Science and TechnologyUniversitas Islam Negeri Syarif Hidayatullah JakartaTangerang Selatan 15412Indonesia Department of Chemistry Faculty of Mathematics and Natural SciencesUniversitas IndonesiaDepok 16424Indonesia Department of Chemistry Faculty of Mathematics and Natural SciencesUniversitas AndalasPadang 25163Indonesia

Spirooxindole is a compound with a unique framework and broad bioactivities in *** this study,we have reviewed various approaches or methods in synthesizing spirooxindole derivatives focused on green *** of spirooxindoles is mainly carried out through multicomponent reactions combined with various green approaches such as the use of heterogeneous catalysts(nano-sized,magnetic,metal-complex,and metal-organic framework catalysts),deep eutectic solvent,solvent-free reactions,catalyst-free reactions,as well as the use of ultrasonic and microwaves *** green method is carried out in addition to obtaining high yields,it also offers reductions in the use of hazardous chemicals,energy use,purification processes,and waste *** a result,green synthesis methods in the synthesis of spirooxindole derivatives are more environmentally friendly.

关键词： Spirooxindoles Green synthesis Catalysis Nanoparticle Ultrasonic irradiation

Characteristics of Biopellets Manufactured from Various Lignocellulosic Feedstocks as Alternative Renewable Energy Sources

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2024年第6期12卷 1103-1123页

作者： Anggara Ridho putra Apri Heri Iswanto Arif Nuryawan Saptadi Darmawan ElvaraWindra Madyaratri Widya Fatriasari Lee Seng Hua Petar Antov Harisyah Manurung Ade Pera Amydha Sudrajat Herawati Pendi Department of Forest Products Faculty of ForestryUniversitas Sumatera Utara.Kampus USU Padang BulanMedan20155Indonesia Research Center for Biomass and Bioproducts National Research and Innovation Agency(BRIN)Jl Raya Bogor KM 46 CibinongBogor16911Indonesia Department of Wood Industry Faculty of Applied SciencesUniversiti Teknologi MARA(UiTM)Cawangan Pahang Kampus JengkaShah Alam26400Malaysia Faculty of Forest Industry University of ForestrySofia1797Bulgaria

The increased valorization of renewable and cost-effective lignocellulosic feedstocks represents a viable,sustainable,and eco-friendly approach toward the production of biopellets as alternative energy *** aim of this research work was to investigate and evaluate the feasibility of using various lignocellulosic raw materials,i.e.,raru(Cotylelobium melanoxylon),mangrove(Rhizophora spp.),sengon(Paraserianthes falcataria),kemenyan toba(Styrax sumatrana),oil palm(Elaeis guineensis),manau rattan(Calamus manan),and belangke bamboo(Gigantochloa pruriens)for manufacturing biopellets with different particle *** raw materials used were tested for their moisture content,specific gravity,ash,cellulose,and lignin *** addition,thermal analyses,i.e.,calorific values,thermogravimetric analysis(TGA),and differential scanning calorimetry(DSC),were *** following properties of the biopellets produced were investigated:moisture content,volatile matter,ash content,fixed carbon,density,and thermal *** on an analysis of the raw materials,raru had the lowest moisture content(12%)and ash content(1.5%)and the highest specific gravity(1.2).Markedly,palm oil stem had the highestα-cellulose(55%)and lignin(37%)*** accordance with the SNI 8675:2018 standard requirements,biopellets with optimal properties(moisture content of 1.4%,ash content of 0.79%,density of 1.09 g/m^(3),calorific value of 4672 cal/g,and TGA residue of 13.9%),were manufactured from raru wood.

关键词： Biomass biopellet renewable energy particle size

Marine soft corals as source of lead compounds for anti-inflammatories

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Coastal Life Medicine 2016年第1期 73-77页

作者： masteria yunovilsa putra Tutik Murniasih Research Center for Oceanography the Indonesian Institute of Sciences(LIPI)Jl.Pasir Putih IAncol TimurJakarta14430Indonesia

Marine soft corals are known to produce a wide array of secondary metabolites,particularly diterpenoids and steroids,and often characterized by uncommon structural features and potent *** remarkable abundance and diversity of bioactive small molecule which have been isolated from soft corals have made these organisms an important source of new drug candidates for human diseases,particularly for their anti-inflammatory *** this paper,the authors reported anti-inflammatory marine natural products isolated from diverse species of soft corals determined in vitro by their inhibition of lipopolysaccharide-induced expression of inducible NO synthase and cyclooxygenase-2 in murine macrophage cells(RAW 264.7).

关键词： Soft corals Lead compounds Anti-inflammatory Secondary metabolites

Secondary metabolites and their biological activities in Indonesian soft coral of the genus Lobophytum

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2016年第11期6卷 909-913页

作者： masteria yunovilsa putra Tutik Murniasih Respati Tri Swasono Joko Tri Wibowo Annissa Nur Cahya Saputri Meilia Rahma Widhiana Irma Shita Arlyza Research Center for Oceanography Indonesian Institute of Sciences Jl.Pasir Putih I Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Gadjah Mada

Objective: To investigate the antioxidant, antibacterial, antimalarial activities and cytotoxicity of the n-hexane, ethyl acetate, n-butanol, and aqueous fractions from a crude extract of Lobophytum ***: This organism was collected from the Selayar Islands(South Sulawesi). The antioxidant activity was performed by the 1,1-diphenyl-2-picryl hydrazyl radical scavenging method. All fractions from the crude extract of Lobophytum sp. were examined for their cytotoxicity using the brine shrimp lethality bioassay and heme polymerization inhibitory activity assay for antimalarial ***: It was found that the ethyl acetate, n-butanol and aqueous fractions exhibited heme polymerization inhibitory activity with IC_(50) values of 11.7, 14.3 and 12.0 mg/m L,respectively, while the n-butanol fraction showed moderate antioxidant activity and cytotoxicity with IC_(50) values of 150.00 and 92.74 mg/m L, ***: This study provides information on antioxidant, antibacterial and antimalarial activities as well as the cytotoxicity of all fractions from the crude extract of Lobophytum sp. This is a new report of antimalarial substances derived from Lobophytum sp.

关键词： Ocean Indonesia Natural products Biological activities

Distribution and diversity of marine natural products from Indonesian marine organisms

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Coastal Life Medicine 2016年第2期4卷 104-107页

作者： masteria yunovilsa putra Tutik Murniasih Research Center for Oceanography Indonesian Institute of SciencesJl.Pasir Putih IAncol TimurJakarta 14430Indonesia

Objective:To study the distribution and diversity of species and isolated molecules,according to their structure classes,from Indonesian marine ***:This study was performed by using the SciFinder^(®)database,MarinLit and references from relevant articles from 1980 to 2014 which collected all the scientific publications dealing with the isolation of chemical compounds from Indonesian marine macroorganisms and ***:The discovery of novel compounds from Indonesian marine organisms gave us a result of a total of 78 ***,terpenoids and peptides(84,67 and 15 new compounds,respectively)represented the three main chemical classes of compounds discovered from Indonesian marine organisms,and together with the other chemical classes showed a range of biological ***:The new marine compounds are mainly from sponges and soft ***,terpenoids and peptides are the most prolific compounds isolated from Indonesian marine *** marine natural products from Indonesian organisms have been screened for anticancer or cytotoxicity activities.

关键词： Ocean Indonesia Natural products Biological activities