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Journal articles on the topic 'Limono't'

Author: Grafiati

Published: 5 June 2025

Last updated: 16 July 2025

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Qoraboyeva, Marjona Panji qizi, and Gulsara Temirqulovna Ro'ziyeva. "TIBBIYOTDA LIMONO'TINING SHIFOBAXSH XUSUSIYATLARI." JOURNAL OF UNIVERSAL SCIENCE RESEARCH 1, no. 11 (2023): 388–93. https://doi.org/10.5281/zenodo.10183845.

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Bugungi kunga kelib dorivor o'simliklar yetishtirish va katta iqtisodiy foyda olish keng tarqalib bormoqda. Shu qatorda limono't yetishtirish ham tibbiy, ham iqtisodiy ahamiyati yuqori sanaladi. Shu asosda limono'tning keng tarqalgan oddiy yetishtirish usuli asosida o'rganildi. Mavjud texnologiyalar asosida sifati yuqori limono't olinganda undan keluvchi katta iqtisodiy daromadni ham olishimiz mumkin.

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Valle, Roberto. "Limonov: vita e avventure di un teppista lirico." HISTORIA MAGISTRA, no. 9 (September 2012): 127–30. http://dx.doi.org/10.3280/hm2012-009012.

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Eduard Limonov, a maudit writer, idol of the Soviet and post-Soviet underground, is the Limonov's eponymous hero of Emmanuel Carrčre, a book that in France has been a literary and political event; a kind of anatomy of the innards of the thug that narrates the novelistic and dangerous life of a voyou, a rogue. From the adventurous life of Limonov you can take the narration of the not official but eccentric and infamous history of the Russia and the West by the Cold War to the rise of Putin. Limonov, National-Bolshevik thug, has joined the Other Russia, an heteroclite coalition, and considers Putin his sworn enemy to be destroyed by a revolution. But Limonov will forfeit the seizure of power and retire to Samarkand or like Rudin, superfluous man of Turgenev's novel, will be forced to die for a cause not his, for the hated democracy.

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Kadeyeva, Regina Albertovna. "The peculiarity of the authorial strategy in E. Limonov's novel "We Had a Great Epoch"." Philology. Theory & Practice 18, no. 4 (2025): 1686–90. https://doi.org/10.30853/phil20250239.

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This article is devoted to the analysis of E. Limonov's novel "We Had a Great Epoch" in the context of the authorial strategy, which is due to the writer's well-known inclination to constructing a special narrative technique and, in general, his penchant for creating experimental forms in thematic and plot terms. The scientific novelty of the research lies in the fact that, for the first time, the writer's novel "We Had a Great Epoch" is considered from the point of view of authorial thematics. The aim of the work is to identify the features of the novel's authorial strategy. As a result of the research, the following has been established. The key components of the novel's authorial strategy are, firstly, the authorial mask of the "real author" himself, embodied in the image of a fictitious author-narrator who mystifies the reader by passing off the text as his own composition. Limonov deliberately blurs the boundaries between the hero and the author, as a result of which these images are identified in the reader's mind. Secondly, there are a number of metanarrative elements, including regular authorial intrusions into the text, remarks, and evaluations. The framing plan of the text, which includes the title, dedication, and preface, is also read as an important element of Limonov's authorial strategy. Thirdly, there is a play on biographicalism, the purpose of which is a deep authorial reflection on his early post-war childhood and an attempt to look at the beginning of his own life path from the height of the years he has lived.

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Zhang, Jun, Zhiqiang Yang, Yan Liang, et al. "Effects of Postharvest Time, Heat Treatment, pH and Filtration on the Limonin Content in Newhall Navel Orange (Citrus sinensis Osbeck cv. Newhall) Juice." Molecules 23, no. 10 (2018): 2691. http://dx.doi.org/10.3390/molecules23102691.

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Delayed bitterness causes severe economic loss in citrus juice industry worldwide, which is mostly due to the formation of limonoid compounds, especially limonin, in juice. In this study, effects of postharvest time of fruits, heat treatment, pH and filtration of juice on limonin content in Newhall navel orange (Citrus sinensis Osbeck cv. Newhall) juice were investigated. Our research indicated for the first time that: (1) limonin content in juice would gradually increase to a maximal level and then remained almost constant thereafter as storage time going on, whereas the maximum constant value (MCV) of limonin content in juice significantly (p < 0.05) decreased with the increment of postharvest time of fruits being juiced; (2) heat treatment and acidification of juice only speeded up the formation of limonin to the maximal level while without changing the MCV of limonin content; (3) the juice after filtration exhibited much lower MCV of limonin content compared with the unfiltered one. These experimental observations might not only provide useful information for the development of new debitterness method for navel orange juice, but also strongly support the acid-promoted delayed bitterness mechanism, suggesting the formation of delayed bitterness might primary due to the acid-promoted rather than the enzyme-catalyzed lactonization of limonoate A-ring lactone (LARL) to produce limonin in juice of navel orange.

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Supratman, Unang, Dudi Runadi, Al Arofatus Naini, et al. "Four Azadirone-Type Limonoids from Chisocheton Pentandrus Stem Bark and Their Cytotoxic Acitivity Against Mcf-7 Breast Cancer Cell Lines." Molekul 19, no. 2 (2024): 360. http://dx.doi.org/10.20884/1.jm.2024.19.2.11085.

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ABSTRACT. Limonoid group belongs to triterpenoid that has undergone further oxidation accompanied by the loss of four carbon atoms to form a furan ring in the chain. This limonoid compound is often found in the Chisocheton genus. Limonoid compounds have been known as compounds with high structural variations and this makes limonoids have diverse and interesting activities, including cytotoxic and anticancer. In the course of our continuing study for limonoid constituents that have cytotoxic activity against cancer cell lines, methanol extract of stem bark from the Chisocheton pentandrus plant provides significant activity. The methanol extract was separated using various chromatographic techniques in the normal and reverse stationary phase to produce four azadirone-type limonoid compounds (1-4). The elucidation structure of 1-4 was determined using spectroscopic methods including, UV-Visible, IR, and 1D-NMR as well as optical rotation. All four known compounds were established as trichilenone acetate (1), toonaciliaton C (2), 11α-acetoxiazadiron (3), and 16β-hydroxydisobinine (4). The cytotoxicity of compounds 1-4 was assessed by examination using the resazurin method, which showed that compound 4 was the promising constituent against the MCF-7 cells with an IC50 value of 43.1 µM and was stronger than its positive control. Keywords: Azadirone-type limonoid, Chisocheton pentandrus, cytotoxic activity, Meliaceae.

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Limonov, M. F., A. I. Rykov, S. Tajima, and A. Yamanaka. "Limonovet al.Reply:." Physical Review Letters 81, no. 10 (1998): 2181. http://dx.doi.org/10.1103/physrevlett.81.2181.

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., Nurlelasari, Asman ., Darwati ., et al. "Two Limonoid Compounds from the Seeds of Chisocheton lasiocarpus (Meliaceae)." Research Journal of Chemistry and Environment 27, no. 4 (2023): 33–38. http://dx.doi.org/10.25303/2704rjce033038.

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Limonoid compounds are found in the Meliaceae family, especially in the genus Chisocheton. This genus belongs to medicinal plants with limonoid content that contains various biological activities such as anticancer, antimalarial, anti-inflammatory, insecticide, antiviral, neuroprotective and antimicrobial properties. One of them which was not much reported is Chisocheton lasiocarpus. This study aims to get the new limonoid compound of C. lasiocarpus seeds. C. lasiocarpus seeds were macerated using methanol and were partitioned using n-hexane, ethyl acetate and butanol. The presence of limonoid was guided using the Ehrlich reagent. Extract of n-hexane was collected and purified by the chromatographic method until two pure isolates was obtained as nimonol (1) and 6α-acetoxy-14β,15β-epoxyazadirone (2). The chemical structure of isolates were identified by spectroscopic data including UV, IR, NMR (1H, 13C, DEPT 135°, HMQC, HMBC, 1H-1H COSY) and by comparison to those related spectra reported previously.

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Dzakir, La Ode, Nurkhalis Mahmudah Dullah, and Hariono Hariono. "Analisis Sifat Fisik Tanah Limonit Dan Saprolit Dengan Pengujian Konsistensi Atterberg." Mining Science And Technology Journal 1, no. 2 (2022): 104–9. http://dx.doi.org/10.54297/minetech-journal.v1i2.379.

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Pelapukan yang terjadi pada batuan ultramafik (batuan pembawa nikel) menyebabkan terjadinya perbedaan zona laterisasi. Perbedaan zona tersebut menyebabkan adanya perbedaan sifat fisik material tanah pada masing-masing zona laterisasi, khususnya material zona limonit dan saprolit. Oleh karena itu perlu dilakukan penelitian untuk melihat perbedaan sifat fisik tanah limonit dan saprolit dengan pengujian konsistensi Atterberg.Berdasarkan hasil penelitian diatas, maka dapat disimpulkan bahwa nilai batas cair (liquid limit), batas plastis (plastic limit) dan Indeks Plastisitas (Plasticity Index) material tanah saprolit lebih besar dibandingkan dengan material tanah limonit. Hal ini menunjukan bahwa material tanah saprolit cenderung lebih plastis dibandingkan dengan material tanah limonit.

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PASKARINO, YOSEPH HERWINDO, Sutarto -, Joko Soesilo, and Bronto Sutopo. "INDIKASI POTENSI SKANDIUM DI ZONA LIMONIT BLOK TAPUNOPAKA, KONAWE UTARA, SULAWESI TENGGARA." Jurnal Sumberdaya Bumi Berkelanjutan (SEMITAN) 1, no. 1 (2022): 308–18. http://dx.doi.org/10.31284/j.semitan.2022.3062.

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Skandium di dalam 27,22 juta ton sumberdaya terukur limonit di Blok Tapunopaka dengan kadar rata-rata 91,21 ppm atau setara dengan 2.482 ton skandium, yang masih terus bertambah seiring kegiatan eksplorasi yang terus berjalan, merupakan indikasi potensi yang sangat besar untuk dikembangkan secara ekonomis. Salah satu strategi pengembangannya adalah dengan mengetahui evolusi dan faktor-faktor pengontrol pengkayaannya untuk memastikan arah pendetilan data dalam penyusunan prioritas konservasi cadangan limonit mengandung skandium. Penelitian skandium dilakukan pada zona limonit dan batuan asal dari 200 data ICP OES daerah Konawe Utara termasuk 74 data dari Blok Tapunopaka, 8 data hasil petrografi batuan asal, dan 4 data hasil analisis XRD batuan asal.Batuan asal dari limonit mengnadung skandium adalah harsburgit dan klinopiroksenit. Kandungan skandium dalam batuan asal sangat menentukan kandungan skandium di zona limonit Skandium di zona limonit berkorelasi positif dengan alumunium dengan R2=0,6817, menunjukkan bahwa skandium hadir bersama dan evolusi skandium dipengaruhi oleh alumunium. Dengan tidak ditemukannya batuan basa yang kaya alumunium sebagai batuan asal dan teridentifikasinya lizardit ((Mg,Al)3((Si,Fe)2O5)(OH)4 sebagai mineral yang mengandung alumunium pada harsburgit dan klinopiroksenit maka lizardit diduga kuat sebagai mineral pembawa skandium

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Byrne, LT, M. Vantri, NM Phuong, MV Sargent, BW Skelton, and AH White. "Perforatin: a Novel Tetranortriterpenoid From Harrisonia perforata." Australian Journal of Chemistry 44, no. 1 (1991): 165. http://dx.doi.org/10.1071/ch9910165.

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Extraction of the dried leaves of Harrisonia perforata (Blanco) Merr ., (Simaroubaceae) has yielded a novel tetranortriterpenoid ( limonoid ), perforatin (1), of the obacunol class. The structure was determined by a combination of spectroscopic analysis and the X-ray method. Comments are made on the stereochemistry of the related limonoid harrisonin.

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Dzakir, La Ode, Hariono Hariono, Nurkhalis Mahmudah Dullah, et al. "STUDI PERBANDINGAN NILAI KOHESI DAN SUDUT GESEK DALAM MATERIAL TANAH LIMONIT DAN SAPROLIT PADA PENAMBANGAN BIJIH NIKEL DESA BELALO, KECAMATAN LASOLO, KONAWE UTARA." Mining Science And Technology Journal 1, no. 1 (2022): 70–76. http://dx.doi.org/10.54297/minetech-journal.v1i1.291.

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Zona limonit dan saprolit merupakan zona dimana kegiatan penambangan nikel dilakukan.Hal ini karena proses pengkayaan mineral terjadi pada zona limonit dan zona saprolit tersebut. Karena merupakan zona tempat kegiatan penambangan berlangsung, maka perlu dilakukan penanganan khusus terhadap kedua zona tersebut. Salah satunya dengan melakukan penelitian untuk mengetahui nilai kohesi dan sudut gesek dalam dari kedua material tersebut Berdasarkan hasil penelitian yang dilakukan diperoleh kesimpulan bahwa material tanah pada zona limonit memiliki nilai kohesi dan sudut gesek dalam yang lebih besar dibandingkan dengan nilai kohesi dan sudut gesek dalam material tanah pada zona saprolit. Hal ini disebabkan oleh kerapatan butir material pada zona limonit lebih rapat dibandingkan dengan kerapatan material tanah pada zona saprolit.

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Pandreka, Avinash, Patil S. Chaya, Ashish Kumar, et al. "Corrigendum to "Limonoid biosynthesis 3: Functional characterization of crucial genes involved in neem limonoid biosynthesis" [Phytochemistry 184 (2021) 112669]." Phytochemistry 187 (April 30, 2021): 112669. https://doi.org/10.1016/j.phytochem.2021.112669.

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Pandreka, Avinash, Chaya, Patil S., Kumar, Ashish, Aarthy, Thiagarayaselvam, Mulani, Fayaj A., Bhagyashree, Date D., Shilpashree, H.B., Jennifer, Cheruvathur, Ponnusamy, Sudha, Nagegowda, Dinesh, Thulasiram, Hirekodathakallu V. (2021): Corrigendum to "Limonoid biosynthesis 3: Functional characterization of crucial genes involved in neem limonoid biosynthesis" [Phytochemistry 184 (2021) 112669]. Phytochemistry (112751) 187: 112669, DOI: 10.1016/j.phytochem.2021.112669, URL: http://dx.doi.org/10.1016/j.phytochem.2021.112669

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Hodgson, Hannah, Ricardo De La Peña, Michael J. Stephenson, et al. "Identification of key enzymes responsible for protolimonoid biosynthesis in plants: Opening the door to azadirachtin production." Proceedings of the National Academy of Sciences 116, no. 34 (2019): 17096–104. http://dx.doi.org/10.1073/pnas.1906083116.

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Limonoids are natural products made by plants belonging to the Meliaceae (Mahogany) and Rutaceae (Citrus) families. They are well known for their insecticidal activity, contribution to bitterness in citrus fruits, and potential pharmaceutical properties. The best known limonoid insecticide is azadirachtin, produced by the neem tree (Azadirachta indica). Despite intensive investigation of limonoids over the last half century, the route of limonoid biosynthesis remains unknown. Limonoids are classified as tetranortriterpenes because the prototypical 26-carbon limonoid scaffold is postulated to be formed from a 30-carbon triterpene scaffold by loss of 4 carbons with associated furan ring formation, by an as yet unknown mechanism. Here we have mined genome and transcriptome sequence resources for 3 diverse limonoid-producing species (A. indica, Melia azedarach, and Citrus sinensis) to elucidate the early steps in limonoid biosynthesis. We identify an oxidosqualene cyclase able to produce the potential 30-carbon triterpene scaffold precursor tirucalla-7,24-dien-3β-ol from each of the 3 species. We further identify coexpressed cytochrome P450 enzymes from M. azedarach (MaCYP71CD2 and MaCYP71BQ5) and C. sinensis (CsCYP71CD1 and CsCYP71BQ4) that are capable of 3 oxidations of tirucalla-7,24-dien-3β-ol, resulting in spontaneous hemiacetal ring formation and the production of the protolimonoid melianol. Our work reports the characterization of protolimonoid biosynthetic enzymes from different plant species and supports the notion of pathway conservation between both plant families. It further paves the way for engineering crop plants with enhanced insect resistance and producing high-value limonoids for pharmaceutical and other applications by expression in heterologous hosts.

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Bruss, Hanna, Hannah Schuster, Rémi Martinez, Markus Kaiser, Andrey P. Antonchick, and Herbert Waldmann. "Synthesis of the B-seco limonoid core scaffold." Beilstein Journal of Organic Chemistry 10 (January 16, 2014): 194–208. http://dx.doi.org/10.3762/bjoc.10.15.

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Synthetic investigations towards the structurally complex and highly decorated framework of B-seco limonoid natural products by means of a [3,3]-sigmatropic rearrangement are described. Detailed model studies reveal, that an Ireland–Claisen rearrangement can be employed to construct the central C9–C10 bond thereby giving access to the B-seco limonoid scaffold. However, application of the developed strategy ended up failing in more complex and sterically demanding systems.

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Jogia, Madhu K., and Raymond J. Andersen. "Limonoids from the Fijian medicinal plant Dysoxylumrichii." Canadian Journal of Chemistry 67, no. 2 (1989): 257–60. http://dx.doi.org/10.1139/v89-042.

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Three new limonoids have been isolated from the Fijian medicinal plant Dysoxylumrichii. Dried D. richii leaves collected at Suva yielded the known limonoid dysoxylin (1) as well as the previously unreported dysoxylone (2). A Taveuni collection of leaves contained the two new metabolites tigloyldysoxylin (3) and 6α-acetoxyobacunol acetate (4). The structures of all three new compounds were determined by spectroscopic analysis. Keywords: Dysoxylumrichii, limonoid, dysoxylone, tigloyldysoxylin, 6α-acetoxyobacunol acetate.

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Azikin, Busthan, Hery Astaman, and Rohaya Langkoke. "Geometric Design Analysis of Pit X Mine Slope Koninis Area, Bunta District, Banggai Regency, Central Sulawesi Province." Journal of Geology and Exploration 2, no. 2 (2023): 63–74. http://dx.doi.org/10.58227/jge.v2i2.114.

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Penelitian mengenai mengenai analisi geometri lereng tambang PIT X dilakukan IUP PT. X di Desa Koninis yang secara administrasi termasuk di Kecamatan Bunta, Kabupaten Bangggai, Provinsi Sulawesi Tengah, dengan mendesain geometri lereng secara statis dan dinamis berdasarkan Keputusan Menteri ESDM No. 1827 K/30/MEM Tahun 2018. Analisis dilakukan menggunakan metode Bishop Simplified menggunakan perangkat lunak Slide 6.0 dari Rockscience. Hasil dari analisis lereng statis lereng keseluruhan pada kondisi tanpa muka air tanah adalah 2.00 dan pada lereng keseluruhan yang dipengaruhi oleh muka air tanah adalah 1.77, inter-ramp bagian limonit adalah 2.53 dan pada lereng inter-ramp bagian saprolite adalah 1.92, lereng tunggal bagian limonit adalah 5.35 dan pada lereng tunggal bagian saprolit adalah 4.10. Sedangkan analisis lereng dinamis lereng keseluruhan dengan koefisien gempa adalah 1.11, inter-ramp bagian limonit dengan koefisien gempa adalah 1.77 dan pada lereng inter-ramp bagian saprolit dengan koefisien gempa adalah 1.35, lereng tunggal bagian limonit dengan koefisien gempa adalah 2.75 dan pada lereng tunggal bagian saprolite dengan koefisien gempa adalah 4.679. Berdasarkan data bor, hasil analisis laboratorium sampel UDS, dan data kegempaan maka nilai FK pada zonasi limonit lebih besar dibandingkan dengan nilai FK pada zonasi saprolit. Desain ini untuk mensimulasikan pemodelan desain geometri lereng pada PIT X daerah penelitian.

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Ardouin, Stéphane, and Cécile André-Chaze. "Des vestiges liés à la phase de construction de l’aqueduc de la Brévenne à Limonest (Métropole de Lyon) ?" Gallia 80, no. 1 (2023): 145–50. http://dx.doi.org/10.4000/11ucz.

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En mai 2014, la fouille d’un tronçon de l’aqueduc de la Brévenne à Limonest a permis de mettre au jour deux longs fossés à fond plat et parois verticales, s’élargissant au contact du canal. Perpendiculaires au conduit, ils ont été découverts comblés par des sédiments riches en matériaux de construction. La présence de creusements similaires sur d’autres tronçons à Limonest, Dardilly ou Lentilly suggère une fonction davantage liée à la construction qu’à la réparation de l’ouvrage.

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Dubakov, Leonid V. "Buddhist exoticism in the works of Eduard Limonov: philosophical and aesthetic criticism." Vestnik of Kostroma State University 28, no. 1 (2022): 118–22. http://dx.doi.org/10.34216/1998-0817-2022-28-1-118-122.

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The article analyses the specifics of the perception of Buddhism by Eduard Limonov. The reception of Buddhism is determined in his work by a system of double coding – he is a writer, but also a politician and publicist. Artistic and political narrative in his works are inextricably linked. Eduard Limonov is a critic of Buddhism, but the consistency of his views is not absolute. For the writer, Buddhism is an unoriginal religion, in the national versions of which there are too much exotic and irrational elements. In addition, Buddhism is a religion with philosophical assumptions of which, Eduard Limonov disagrees. The vision of reality as full of suffering and the desire to escape from it contradicts the active life position of the writer. At the same time, in the work of Eduard Limonov, the tendency towards the Russification of Buddhism, characteristic for the modern Russian literature, manifests itself. The writer also explores the mystical side of this religion in its Tibeto-Mongolian version, perceiving and actualising its superhuman component.

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Juita, Ita, Erwin Anshari, and Irfan Saputra. "Estimasi Cadangan Endapan Nikel Laterit Pada Sub Blok 4 Blok TAA PT Bumi Nikel Nusantara Kecamatan Andowia Kabupaten Konawe Utara Provinsi Sulawesi Tenggara." OPHIOLITE : Jurnal Geologi Terapan 5, no. 2 (2023): 35–43. http://dx.doi.org/10.56099/ophi.v5i2.p35-43.

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Perhitungan cadangan merupakan hal penting dalam proses penambangan sumberdaya mineral. Perhitungan cadangan dijadikan sebagai dasar evaluasi untuk menghasilkan keputusan suatu endapan layak atau tidak layak ditambang. Pada penelitian ini, pengolahan data dilakukan dengan menggunakan bantuan perangkat lunak Micromine 2021.5. Berdasarkan hasil pengolahan data diperoleh nilai coefficient of varians (CV) assay zona limonit adalah 0,37 dan zona saprolit 0,33 sedangkan nilai CV komposit zona limonit adalah 0,35 dan zona saprolit 0,30 dan hasil variogram kadar nikel menghasilkan anisotropi geometri yang menggambarkan daerah pengaruh (range) sebaran endapan nikel untuk zona limonit sepanjang 48,02 m dan berarah N139,6°E sedangkan range untuk zona saprolit sepanjang 50,45 m dan berarah N140,1°E, yang berarah tenggara-baratlaut untuk zona limonit dan zona saprolit. Estimasi sumberdaya dilakukan menggunakan metode Inverse Distance Weight (IDW) Power 4 yang diperoleh melalui analisis hasil penaksiran menggunakan parameter root mean square error (RMSE) dengan total volume cadangan pada Sub Blok 4 Blok TAA adalah sebesar 276.350 m3 dan memiliki tonase sebesar 429.893 ton dengan nilai rata-rata kadar Ni adalah 1,68%.

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Shohista TURSUNOVA. "MELISSA OFFCINALIS L. O’SIMLIGI O’SISH SHAROITLARINING EFIR MOYLARI MIQDORIGA VA ULARNING KOMPONENT TARKIBIGA TA’SIRINI O’RGANISH." UzMU xabarlari 3, no. 3.1 (2024): 156–59. http://dx.doi.org/10.69617/uzmu.v3i3.1.1750.

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Ushbu maqolada Dorivor limono’t – Melissa officinalis L.o’simligi o’sish sharoitlarining efir moylari miqdoriga va ularning komponent tarkibiga ta’sirini o’rganish bo’yicha olingan natijalar keltirilgan. Olingan natijalarga ko’ra, efir moylarining miqdori o’sish sharoitlari va vegetatsiya davriga qarab farq qilishi aniqlandi. Efir moylarining tarkibi ham organlarga mos ravishda farqlanishi qayd etildi. O’simlikning turli organlarida efir moylarining komponent tarkibidagi farqlanish ham keltirilgan.

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Biavatti, Maique W., Paulo C. Vieira, M. Fatima G. F. da Silva, João B. Fernandes, and Sérgio Albuquerque. "Limonoids from the Endemic Brazilian Species Raulinoa echinata." Zeitschrift für Naturforschung C 56, no. 7-8 (2001): 570–74. http://dx.doi.org/10.1515/znc-2001-7-815.

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Phytochemical survey of stems and leaves of the South Brazilian endemic Raulinoa echinata Cowan, Rutaceae led to the isolation of five limonoid derivatives: the widespread limonin, limonexic acid, kihadalactone B, a methoxylated limonexic acid derivative and a degraded limonoid structurally related to fraxinellone. The two latter compounds have been isolated for the first time. These compounds displayed weak inhibitory activity when assayed in vitro against trypomastigote forms of Trypanosoma cruzi. In this paper, the isolation, structure elucidation and bioactivity of these compounds are reported

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Putri Ramadhani, Ayumi Hana, Andi Cahyadi, Tatik Handayani, and Suwahyadi. "KARAKTERISTIK ENDAPAN BIJIH BESI LATERIT PADA BLOK BARAT DAN BLOK TIMUR PT SILO, KABUPATEN KOTABARU, KALIMANTAN SELATAN BERDASARKAN ANALISIS GEOKIMIA DAN MINERALOGI." Buletin Sumber Daya Geologi 18, no. 3 (2024): 183–96. http://dx.doi.org/10.47599/bsdg.v18i3.425.

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Penelitian ini dilakukan untuk mengidentifikasi karakteristik endapan laterit pada Blok Barat dan Blok Timur Pulau Sebuku, Kabupaten Kotabaru, Kalimantan Selatan dengan menggunakan metode observasi lapangan, dan analisis laboratorium meliputi analisis titrasi, XRF, XRD dan petrografi. Karakteristik endapan laterit Blok Barat memiliki kedalaman 10 meter s.d 15 meter. Zona red limonit memiliki kandungan Fe 51,25% dengan komposisi mineral hematit, magnetit, goethite, ilmenit, spinel. Zona yellow limonit memiliki kandungan Fe 50,1% dengan komposisi mineral goethite, hematit, gibsit, ilmenit. Zona saprolit memiliki kandungan Fe 16,2% komposisi mineral hematit, krisotil, goethite, garnet, diopside. Karakteristik endapan laterit Blok Timur yaitu memiliki kedalaman 6 meter s.d 7,5 meter. Zona red limonit memiliki kandungan Fe 47,38% dengan komposisi mineral hematit, goethite, ilmenit, spinel. Zona yellow limonit memiliki kandungan Fe 38,70% dengan komposisi mineral goethite, hematit, chromite, gibsit, spinel. Zona saprolit memiliki kandungan Fe 15,08% komposisi mineral hematit, goethite, diopside, fayalite. Batuan dasar (Bedrock) daerah penelitian berupa periodotit yaitu dunit dan harzburgit yang telah terserpentinisasi. Komposisi mineral batuan dasar yaitu olivin, piroksen, mineral opak serta beberapa mineral sekunder yaitu serpentin dan talk. Batuan dasar Blok Barat memiliki kandungan Fe sekitar 7,73% s.d 8,03% sedangkan batuan dasar Blok Timur memiliki kandungan Fe sekitar 6,59% s.d 7,49%.

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Kołakowski, Michał. "Wojna oczami „nacbola”. Obraz wojny w zbiorze opowiadań Smrt Eduarda Limonowa." Kultury Wschodniosłowiańskie - Oblicza i Dialog, no. 9 (December 20, 2019): 47–57. http://dx.doi.org/10.14746/kw.2019.9.4.

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The article is devoted to the image of war in Smrt – a collection of short stories written by Eduard Limonov. Eduard Limonov is a controversial Russian writer and politician known for his extremist worldview, scandalous literary works and involvement in the national-bolshevik movement. The action of most of the stories is set against the backdrop of the Yugoslav Wars. Limonov describes the dark sides of the war: death, suffering of civilians and atrocities, but at the same time claims that war creates an excellent opportunity to experience a fascinating adventure and to become a true hero. In his opinion, the war is completely consistent with the most basic human instincts, therefore, it is not surprising that many soldiers participate in war with enthusiasm and prefer it to a boring, stabilized life.

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SANTOSO, BUDI, BAMBANG WIJATMOKO, and EDDY SUPRIYANA. "KAJIAN NIKEL LATERIT DENGAN METODE ELECTRICAL RESISTIVITY TOMOGRAPHY DI DAERAH BATU PUTIH, KOLAKA UTARA SULAWESI TENGGARA." Jurnal Material dan Energi Indonesia 7, no. 01 (2017): 25. http://dx.doi.org/10.24198/jmei.v7i01.11043.

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Abstrak. Endapan nikel laterit terdapat pada zona limonit, zona saprolit, dan zona saprock. Masing-masing zona laterit tersebut mempunyai kandungan mineral dan kadar nikel yang berbeda, sehingga mempunyai nilai resistivitas yang berbeda-beda. Penampang laterit dapat diperoleh dengan Metode Electrical Resistivity Tomography (ERT). Metode ERT adalah metode pengukuran resistivitas dipermukaan tanah dengan menggunakan banyak elektroda, agar diperoleh variasi distribusi resistivitas bawah permukaan secara lateral dan vertikal, sehingga didapatkan citra bawah permukaan. Konfigurasi elektroda yang digunakan dalam akuisisi data ERT yaitu Konfigurasi Wenner. Pengolahan data menggunakan program inversi Res2DInv. Berdasarkan hasil pengukuran ERT yang telah dikorelasikan dengan data test pit, diperoleh nilai resistivitas laterit sebagai berikut : resistivitas limonit : < 400 Ohm.m, resistivitas saprolit : (400 – 640) Ohm.m, resistivitas saprock : (640 – 1720) Ohm.m dan resistivitas bedrock > 1720 Ohm.m.Kata kunci : ERT, limonit, saprolit, saprock, Wenner

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Bentley, Michael D., Mohammed S. Rajab, Michael J. Mendel, and A. Randall Alford. "Limonoid model insect antifeedants." Journal of Agricultural and Food Chemistry 38, no. 6 (1990): 1400–1403. http://dx.doi.org/10.1021/jf00096a022.

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Hasegawa, Shin, Raymond D. Bennett, Zareb Herman, Chi H. Fong, and Peter Ou. "Limonoid glucosides in citrus." Phytochemistry 28, no. 6 (1989): 1717–20. http://dx.doi.org/10.1016/s0031-9422(00)97831-2.

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Toscano, Rubén A., Rachel Mata, José Calderon, and Rosabel Segura. "Gedunin, ad-seco limonoid." Journal of Chemical Crystallography 26, no. 10 (1996): 707–11. http://dx.doi.org/10.1007/bf01991968.

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Bennett, Raymond D., Masaki Miyake, Yoshihiko Ozaki, and Shin Hasegawa. "Limonoid glucosides inCitrus aurantium." Phytochemistry 30, no. 11 (1991): 3803–5. http://dx.doi.org/10.1016/0031-9422(91)80116-i.

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Li, Wan-Shan, Yang Yang, Jun-Jun Liu, Li Shen, Zhi Shi, and Jun Wu. "Scaffold diversity-oriented synthesis of limonoid dimers: discovery of an axially chiral agent within vivoanti-breast cancer activity." Organic Chemistry Frontiers 5, no. 7 (2018): 1079–91. http://dx.doi.org/10.1039/c8qo00154e.

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Oliveira, Iara dos Santos da Silva, Carla Junqueira Moragas Tellis, Maria do Socorro dos Santos Chagas, et al. "Carapa guianensis Aublet (Andiroba) Seed Oil: Chemical Composition and Antileishmanial Activity of Limonoid-Rich Fractions." BioMed Research International 2018 (September 6, 2018): 1–10. http://dx.doi.org/10.1155/2018/5032816.

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Leishmaniasis is a complex of diseases caused by protozoa of the genus Leishmania and affects millions of people around the world. Several species of plants are used by traditional communities for the treatment of this disease, among which is Carapa guianensis Aubl. (Meliaceae), popularly known as andiroba. The objective of the present work was to conduct a chemical study of C. guianensis seed oil and its limonoid-rich fractions, with the aim of identifying its secondary metabolites, particularly the limonoids, in addition to investigating its anti-Leishmania potential. The chemical analyses of the C. guianensis seed oil and fractions were obtained by electrospray ionization mass spectrometry (ESI-MS). The cytotoxic activity was tested against peritoneal macrophages, and antileishmanial activity was evaluated against promastigotes and intracellular amastigotes of Leishmania amazonensis. All the C. guianensis seed oil samples analyzed exhibited the same pattern of fatty acids, while the limonoids 7-deacetoxy-7-hydroxygedunin, deacetyldihydrogedunin, deoxygedunin, andirobin, gedunin, 11β-hydroxygedunin, 17-glycolyldeoxygedunin, 6α-acetoxygedunin, and 6α,11β-diacetoxygedunin were identified in the limonoid-rich fractions of the oil. The C. guianensis seed oil did not exhibit antileishmanial activity, and cytotoxicity was higher than 1000 μg/mL. Three limonoid-rich oil fractions demonstrated activity against promastigotes (IC50 of 10.53±0.050, 25.3±0.057, and 56.9±0.043μg/mL) and intracellular amastigotes (IC50 of 27.31±0.091, 78.42±0.086, and 352.2±0.145 μg/mL) of L. amazonensis, as well as cytotoxicity against peritoneal macrophages (CC50 of 78.55±1.406, 139.0±1.523, and 607.7±1.217 μg/mL). The anti-Leishmania activity of the limonoid-rich fractions of C. guianensis can be attributed to the limonoids 11β-hydroxygedunin and 6α,11β-diacetoxygedunin detected in the chemical analysis.

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Hilmayanti, Erina, Nurlelasari Nurlelasari, Dewa Gede Katja, et al. "Azadirone-Type Limonoids from the Fruit of Chisocheton lasiocarpus and Their Cytotoxic Activity Against MCF-7 Breast Cancer Lines." Molekul 17, no. 1 (2022): 60. http://dx.doi.org/10.20884/1.jm.2022.17.1.5593.

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Limonoid is derivatives of triterpenoid compound that have a wide variety of structures due to various ring-opening, rearrangements, and high-degree of oxidation. Limonoid is known as compounds that have wide-range of biological activities, including anticancer activity. This research was aimed to determine the chemical structure and cytotoxic activity of limonoid in the n-hexane extract of Chisocheton lasiocarpus fruit. Dried powder of C. lasiocarpus fruit was extracted using methanol followed by fractionated using n-hexane, ethyl acetate, and n-butanol. Five azadirone-type limonoids, 6α-(acetoxy)-14β,15β-epoxyazadirone (1), dysobinin (2), 7α-acetylneotricilenone (3), 6α-O-acetyl-7-deacetylnimocinol (4), and 7α-hyroxyneotricilenone (5), were isolated from the n-hexane extract of Chisocheton lasiocarpus fruit. The chemical structure of all compounds was identified by spectroscopic analysis, including 1D, 2D-NMR, IR, UV and HR-TOF MS as well as by comparison with previous reported spectra data. Compounds 1-5 were investigated from this plant for first time. The cytotoxic activity of the isolated compounds against MCF-7 breast cancer line were examined and the results showed that 7α-hyroxyneotricilenone (5) showed the moderate activity with IC50 values of 53 μM

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Tambunan, Ghina Uli Felicia, Nurlelasari Nurlelasari, and Shabarni Gaffar. "Senyawa Golongan Limonoid dari Tanaman Genus Chisocheton dan Aktivitas Antikankernya." ALCHEMY Jurnal Penelitian Kimia 17, no. 1 (2021): 10. http://dx.doi.org/10.20961/alchemy.17.1.41279.10-26.

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Indonesia merupakan negara yang kaya akan keanekaragaman hayati. Terdapat banyak tanaman yang mengandung senyawa metabolit sekunder yang memiliki aktivitas biologi sehingga berpotensi untuk digunakan sebagai obat, salah satunya adalah genus Chisocheton. Tanaman genus Chisocheton sudah banyak dilaporkan mengandung senyawa triterpenoid, seskuiterpenoid, limonoid, steroid, dan fenol. Limonoid merupakan turunan triterpenoid yang paling banyak ditemukan pada tanaman genus Chisocheton. Lebih dari tiga puluh senyawa golongan limonoid telah diuji aktivitas antikankernya terhadap beberapa jenis sel kanker manusia, seperti sel kanker payudara, mulut, paru-paru, leukimia, serviks, dan hati. Beberapa senyawa limonid tersebut diketahui memiliki aktivitas sitotoksik yang tinggi dengan kisaran nilai IC50 1,67 − 50,27 µg/mL. Review ini memaparkan beberapa senyawa limonoid yang diisolasi dari genus Chisocheton, aktivitas sitotoksiknya terhadap sel-sel kanker manusia, serta hubungan struktur dan aktifitas biologisnya (SAR = Structure Activity Relationship). Selain itu beberapa penelitian juga sudah melakukan penelitian lebih lanjut seperti pengujian induksi apoptosis dan penentuan tingkat ekspresi gen-gen yang berhubungan dengan apoptosis. Penelitian-penelitian yang dilakukan ini mengarah pada pencarian senyawa baru yang dapat digunakan sebagai lead compound untuk mendapatkan obat antikanker yang efektif.Limonoid Compounds from Genus Chisocheton Plant and Its Anticancer Activity. Indonesia is a country with a large biodiversity. There are many plants contain secondary metabolite compounds with biological activity, such as Chisocheton genus. The Chisocheton is reported as plant with triterpenoids, sesquiterpenoids, limonoids, steroids and phenols content. Limonoids arethe derivative of triterpenoid which mostly found in Chisocheton genus. More than thirty limonoids have been studied for their anticancer activity against several types of human cancer cells, such as breast, mouth, lung, leukemia, cervical, and liver cancer cells. Some of these limonoids are known to have high cytotoxic activity with the IC50 values of 1.67 − 50.27 µg/mL. This review discuss many kind of limonoid compounds isolated from Chisocheton, their cytotoxic activity against human cancer cells, and their structural activity relationship (SAR) study. This review also discusses some research result for further studies of Chisocheton wether in the mechanism of apoptosis induction and also the determination genes level expression or proteins associated with the apoptosis. This review reveals the important of the study to find a new compounds for an effective anticancer drug.

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Pandreka, Avinash, Patil S. Chaya, Ashish Kumar, et al. "Limonoid biosynthesis 3: Functional characterization of crucial genes involved in neem limonoid biosynthesis." Phytochemistry 184 (April 2021): 112669. http://dx.doi.org/10.1016/j.phytochem.2021.112669.

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Haryati, Endang, Khaeriah Dahlan, Steven Yohanes Yulianus Mantiri, and Beatrix Singir. "Profil dan Karakteristik Mineral Nikel Laterit di Daerah Angkasapura, Kota Jayapura, Papua, Indonesia." Jurnal Fisika 11, no. 2 (2021): 95–104. http://dx.doi.org/10.15294/jf.v11i2.33067.

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Bijih Nikel merupakan bahan alam yang banyak digunakan dalam bidang perindustrian yang mempunyai sifat tahan karat. Daerah Angkasapura Jayapura termasuk dalam wilayah pengunungan Cycloop dengan berbagai jenis batuan. Tujuan dari penelitian ini adalah untuk menentukan profil nikel laterit, komposisi mineral nikel laterit, struktur senyawa mineral nikel laterit dan morfologi permukaan nikel laterit di daerah Angkasapura. Penelitian dilakukan dengan menggunakan metode geolistrik resistivitas konfigurasi Schlumberger. Hasil penelitian menunjukkan bahwa profil nikel laterit yang tersebar pada 3 titik pengukuran yang diidentifikasi dengan metode geolistrik terdiri dari 4 jenis lapisan dengan nilai resistivitas 1,96–362,0 untuk lapisan limonit, 404,0–417,0 untuk lapisan saprolit, 661,0–929,0 untuk lapisan saprock dan 1977,0–3822,0 untuk lapisan bedrock. Persentase unsur Nikel pada sampel nikel laterit pada 4 jenis lapisan yaitu 0,51% pada lapisan top soil, 1,32% pada lapisan red limonit, 1,40% pada lapisan yellow limonit dan 15,3% pada lapisan saprock. Hasil penelitian menunjukkan bahwa nikel laterit yang tersebar di daerah Angkasapura Jayapura, Papua berpotensi sebagai sumber tambang Nikel.

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Jing, Li, Li Feng, Zhiguo Zhou, et al. "Limonoid compounds from Xylocarpus granatum and their anti-cancer activity against esophageal cancer cells." Journal of Clinical Oncology 38, no. 15_suppl (2020): e16516-e16516. http://dx.doi.org/10.1200/jco.2020.38.15_suppl.e16516.

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e16516 Background: We aimed to study the anti-cancer effects of limonoid compounds that were isolated and purified from Xylocarpus granatum fruits on human esophageal cancer cells. A structure-activity relationship experiment was designed to identify the functional moiety of limonoid compounds identified as being critical for its anti-cancer activity. Methods: Esophageal cancer Eca109 cells were treated with limonoid compounds. Cell proliferation was determined by the MTT assay in vitro and cellular apoptosis by flow cytometry and Western Immunolotting. Results: Four linonoid compounds strongly inhibited the cellular proliferation of Eca109 cells. Xylogranatin C was the strongest inhibitor, whose inhibitory effect was comparable to that of the well-known chemotherapeutic agent, cisplatin. Furthermore, xylogranatin C might induce Eca109 cell apoptosis through joint effects on multiple pathways, including the death receptor and endoplasmic reticulum pathways. Additionally, xylogranatin C suppressed tumor cell proliferation by up-regulating miR-203a expression in Eca109 cells. Conclusions: Inhibitory effects of xylogranatin C were more potent than cisplatin. Xylogranatin C induced Eca109 cellular apoptosis and exerted anti-tumor activity. Xylogranatin C might have induced Eca109 cellular apoptosis via joint effects on multiple pathways, including the death receptor and mitochondria-dependent signaling pathways. Additionally, xylogranatin C suppressed tumor cell proliferation by up-regulating miR-203a expression in Eca109 cells.

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Rabbani Rafif Abidin, Sulaeman, and Hartaja M. Hatta Wicaksono. "KARAKTERISTIK ENDAPAN NIKEL LATERIT DAN UNSUR TANAH JARANG PADA DAERAH PULAU GEBE, HALMAHERA TENGAH, MALUKU UTARA." Buletin Sumber Daya Geologi 17, no. 2 (2022): 65–79. http://dx.doi.org/10.47599/bsdg.v17i2.345.

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Nikel laterit merupakan produk dari pelapukan batuan ultramafik yang memiliki kelimpahan mineral olivin dan ortopiroksen. Geologi di daerah Pulau Gebe, Kabupaten Halmahera Tengah, Provinsi Maluku Utara disusun oleh batugamping yang disetarakan dengan Formasi Waigeo yang memiliki hubungan ketidakselarasan dengan batuan ultramafik di bawahnya sebagai pembawa endapan nikel laterit. Pelapukan pada batuan ultramafik menghasilkan profil dan karakter nikel laterit yang berbeda. Penelitian ini bertujuan untuk mengetahui karakteristik laterit dan batuan asal daerah Pulau Gebe dan mengetahui karakteristik unsur tanah jarang pada daerah Pulau Gebe. Berdasarkan hasil penelitian diketahui bahwa pembawa nikel laterit pada daerah Pulau Gebe adalah dunit. Profil endapan nikel laterit pada Pulau Gebe terdiri dari limonit merah, limonit kuning, dan saprolit. Zona limonit merah dicirikan dengan kandungan Fe2O3 relatif tinggi dan derajat lateritisasi kuat, zona limonit kuning dicirikan dengan kandungan Al2O3 relatif tinggi dan derajat lateritisasi lemah hingga kuat, zona saprolit dicirikan dengan kandungan MgO dan SiO2 relatif tinggi. Secara umum pada endapan Ni laterit area penelitian menunjukkan pengayaan relatif ΣREE terhadap batuan dasar dan kandungan ΣLREE lebih melimpah dibandingkan dengan kandungan ΣHREE. Berdasarkan korelasi spearman, pengontrol utama pengayaan ΣLREE(La-Eu) dan ΣHREE(Gd-Lu) adalah mineral Fe dengan nilai koefisien Spearman antara ΣLREE(La-Eu) dan ΣHREE(Gd-Lu) dengan Fe2O3 adalah 0,64 – 0,83. Sedangkan pengontrol utama pengayaan Sc adalah mineral Al dengan nilai koefisien spearman antara Sc dengan Al2O3 adalah 0,59. Kata kunci: Ni laterit, Batuan dasar, REE, Pulau Gebe

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Ramdani, Fasya Zahra Fauziyyah Ramdani, Ayumi Hana Putri Ramadhani, Andhi Cahyadi, Ernowo, and Wahyu Widodo. "DERAJAT LATERITISASI DAN PENGAYAAN UNSUR FE-NI-CO PADA BATUAN HARSBURGIT DI PULAU SEBUKU, KALIMANTAN SELATAN." Buletin Sumber Daya Geologi 18, no. 3 (2024): 171–82. http://dx.doi.org/10.47599/bsdg.v18i3.411.

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Iklim tropis di Indonesia menyebabkan tingginya tingkat pelapukan kimiawi atau lateritisasi pada batuan ultrabasa menghasilkan pengayaan unsur-unsur ekonomis diantaranya Fe, Ni dan Co yang terakumulasi pada zona limonit maupun saprolit. Penelitian ini dilakukan di Pulau Sebuku yang didominasi oleh batuan ultrabasa diantaranya adalah harsburgit. Penelitian ini bertujuan untuk mengetahui pengaruh derajat lateritisasi pada zona limonit, saprolit dan batuan asal terhadap pengayaan Fe, Ni dan Co. Sebanyak 95 sampel diambil dari 9 lubang bor dan dianalisis menggunakan XRF untuk mengetahui unsur utama dan unsur ekonomis. Derajat lateritisasi dihitung dari kandungan SiO2 dibagi dengan akumulasi total SiO2, Al2O3 dan Fe2O3 atau S/SAF indeks menggambarkan intensitas dari reaksi kimia. Nilai terendah dari S/SAF indeks menunjukkan derajat lateritisasi yang lebih tinggi. Masing-masing zona limonit, saprolit dan batuan dasar memiliki nilai indeks S/SAF berkisar dari 0,16 s.d. 0,58 (lateritisasi kuat), 0,27 s.d. 0,85 (lateritisasi sedang-kaolinisasi) dan 0,77 s.d. 1,24 (batuan induk). Zona dengan derajat lateritisasi kuat mengandung kadar Fe antara 36% s.d. 51%, Ni 0,80% s.d. 1,38 % dan Co 0,07% s.d. 1,17%. Harsburgit mengandung kadar Fe 4,86% s.d. 7,99%, Ni 0,20% s.d. 1,76% dan Co 0,005% s.d. 0,015%. Derajat lateritisasi di zona limonit lebih tinggi dibandingkan dengan zona saprolit dan batuan dasar harsburgit disebabkan oleh dekomposisi dari mineral silika, pembentukan mineral sekunder pembawa besi dan aluminium oksida-hidroksida. Derajat lateritisasi memiliki hubungan positif dengan pengayaan Fe dan Co, tetapi tidak berkorelasi terhadap pengayaan Ni.

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Ilyas, Ponnaisila, Arbi Haya, Almun Madi, and George Belly Sahetapy. "Analisis Daya Dukung Material Menggunakan Metode Hoek And Bray Pada Areal Penambangan Blok Lily Di PT. Tekindo Energi Site Lelilef Kecamatan Weda Tengah Kabupaten Halmahera Tengah." Jurnal GEOMining 3, no. 2 (2022): 76–83. https://doi.org/10.33387/geomining.v3i2.5576.

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Geoteknik tambang adalah pengolahan teknis pertambangan dalam kegiatan yang menyelimuti penyelidikan tentang kestabilan pada suatu lereng, Metode Hoek andÂ Bray merupakan metode yang dapat digunakan untuk menganalisis kestabilan lereng. Untuk rancangan geometri lereng pada Blok Lily dapat menggunakan sudut kemiringan lereng pada kemiringan 20Â° (FK 1,26) untuk tinggi 5 meter material limonit, untuk material saprolit pada ketinggian 5 meter dapat menggunakan sudut kemiringan 60Â° (FK 1,13). Untuk tinggi 6 meter pada material limonit dapat menggunakan sudut kemiringan lereng 40Â° (FK 1,20), sedangkan untuk material saprolit dapat menggunakan sudut kemiringan 30Â° (FK 1,16) dan untuk rancangan geometri lereng dengan tinggi 7 meter dapat menggunakan sudut kemiringan lereng 30Â° (FK 1,15) untuk material limonit, sedangkan material saprolit dapat menggunakan 20Â° (FK 1,27) dan apabila rancangan geometri lereng menggunakan sudut kemiringan yang lebih dari 60Â°. Berdasarkan hasil perhitungan dan pengamatan menggunakan metode Hoek and Bray pada Blok Lily dapat menggunakan desain geometri lereng dengan sudut kemiringan lereng 50Â° dengan tinggi lereng 5 meter.Â Kata kunci: Analisis, Faktor Keamanan, Hoek And Bray, Lelilef, Material

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Anbiyak, Nur. "PENGGUNAAN METODE GEOSTATISTIK DALAM ESTIMASI KADAR NIKEL PADA CEBAKAN BIJIH NIKEL LATERIT PETEA." Prosiding Temu Profesi Tahunan PERHAPI 1, no. 1 (2018): 271–84. http://dx.doi.org/10.36986/ptptp.v0i0.27.

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Cebakan bijih nikel laterit Petea berada di Kabupaten Luwu Timur, ProvinsiSulawesi Selatan yang terbentuk sebagai produk dari proses pelapukan batuanultramafik yang tersebar di sebagian lengan selatan dan tenggara Pulau Sulawesi. Profil pelapukan batuan di Petea terdiri dari tiga lapisan utama dengan urutan dari bawah ke atas, yaitu batuan dasar, lapisan saprolit, dan limonit. Mineralisasi nikel terbentuk pada lapisan saprolit dan limonit dan dapat dibedakan berdasarkan karakteristik geologi dan geokimianya.Metode geostatistik dipakai karena kemampuan metode tersebut untukmenunjukkan korelasi spasial dalam populasi data. Analisis variografi dilakukandengan membuat variogram untuk yang mewakili arah utama sebaran nikel pada lapisan saprolit dan limonit. Variogram directional mengindikasikan bahwa kadar nikel tersebar pada kedua lapisan tersebut dan tidak menunjukkan kecenderungan pada arah tertentu. Parameter variogram dipergunakan sebagai dasar analisis geostatistik untuk melakukan estimasi kadar nikel. Metode ordinary kriging dipilih untuk melakukan estimasi kadar nikel Petea dan menghasilkan kadar nikel rata-rata sebesar 1,89% pada bijih saprolit. Hasilrekonsiliasi dengan data produksi bijih saprolit menunjukkan deviasi sebesar4,42% dimana hasil estimasi menghasilkan nilai kadar nikel yang lebih besar.

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Purnomo, Hendro. "APLIKASI METODE INTERPOLASI INVERSE DISTANCE WEIGHTING DALAM PENAKSIRAN SUMBERDAYA LATERIT NIKEL (Studi kasus di Blok R, Kabupaten Konawe-Sulawesi Tenggara)." Angkasa: Jurnal Ilmiah Bidang Teknologi 10, no. 1 (2018): 49. http://dx.doi.org/10.28989/angkasa.v10i1.221.

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Abstrak. Inverse Distance Weighting (IDW) adalah salah satu metode interpolasi untuk menaksir suatu nilai pada lokasi yang tidak tersampel berdasarkan data disekitarnya. Metode ini sering digunakan dalam kegiatan eksplorasi karena dalam proses perhitungannya lebih sederhana dan mudah difahami. Penelitian ini bertujuan untuk memetakan sebaran bijih limonit secara lateral dan potensi sumberdaya nikel, dengan menggunakan metode IDW untuk menaksir kadar Ni dan ketebalan zona mineralisasi. Penelitian ini dilakukan berdasarkan data hasil pengebeboran prospeksi sebanyak 60 titik bor. Parameter power yang digunakan dalam proses interpolasi adalah 1, 2, 3, 4 dan 5. Untuk memilih nilai power yang terbaik digunakan parameter Root Mean Square Error (RMSE) yang diperoleh dari prosedur cross validation. Berdasarkan nilai RMSE terkecil diperoleh bahwa metode IDW dengan power 1 adalah yang terbaik. Dengan asumsi nilai cut-off grade adalah 1,2% Ni dan densitas limonit 1,6 ton/m³, hasil estimasi sumberdaya pada zona limonit adalah 151,7 juta ton bijih dengan kadar rata-rata 1,45% Ni atau setara dengan ± 2,2 juta ton logam nikel. Peta sebaran bijih menunjukkan bahwa potensi tambahan sumberdaya masih terbuka kearah selatan dan barat laut dari daerah penelitian.

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OZAKI, Yoshitake, Chi H. FONG, Zareb HERMAN, et al. "Limonoid glucosides in citrus seeds." Agricultural and Biological Chemistry 55, no. 1 (1991): 137–41. http://dx.doi.org/10.1271/bbb1961.55.137.

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Ozaki, Yoshihiko, Chi H. Fong, Zareb Herman, et al. "Limonoid Glucosides in Citrus Seeds." Agricultural and Biological Chemistry 55, no. 1 (1991): 137–41. http://dx.doi.org/10.1080/00021369.1991.10870551.

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HASEGAWA, SHIN, CHI H. FONG, MASAKI MIYAKE, and JAMES H. KEITHLY. "Limonoid glucosides in Orange Molasses." Journal of Food Science 61, no. 3 (1996): 560–61. http://dx.doi.org/10.1111/j.1365-2621.1996.tb13157.x.

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Cortez, Diógenes A. G., João B. Fernandes, Paulo C. Vieira, M. Fátima das G.F da Silva, and A. Gilberto Ferreira. "A limonoid from Trichilia estipulata." Phytochemistry 55, no. 7 (2000): 711–13. http://dx.doi.org/10.1016/s0031-9422(00)00298-3.

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Hassanali, A., M. D. Bentley, E. N. Ole Sitayo, P. E. W. Njoroge, and M. Yatagai. "Studies on limonoid insect antifeedants." International Journal of Tropical Insect Science 7, no. 04 (1986): 495–99. http://dx.doi.org/10.1017/s1742758400009711.

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Randrianarivelojosia, Milijaona, Maria P. Kotsos, and Dulcie A. Mulholland. "A limonoid from Neobeguea mahafalensis." Phytochemistry 52, no. 6 (1999): 1141–43. http://dx.doi.org/10.1016/s0031-9422(99)00290-3.

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Mulholland, Dulcie A., Milijaona Randrianarivelojosia, Catherine Lavaud, Jean-Marc Nuzillard, and Sianne L. Schwikkard. "Limonoid derivatives from Astrotrichilia voamatata." Phytochemistry 53, no. 1 (2000): 115–18. http://dx.doi.org/10.1016/s0031-9422(99)00488-4.

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Corey, E. J., and Robert W. Hahl. "Synthesis of a limonoid, azadiradione." Tetrahedron Letters 30, no. 23 (1989): 3023–26. http://dx.doi.org/10.1016/s0040-4039(00)99392-4.

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Mulholland, Dulcie, Hamdani Mahomed, Maria Kotsos, et al. "Limonoid derivatives from Cedrelopsis grevei." Tetrahedron 55, no. 38 (1999): 11547–52. http://dx.doi.org/10.1016/s0040-4020(99)00653-5.

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Geng, Zhao-Liang, Xin Fang, Ying-Tong Di, Qiang Zhang, Yue-Mao Shen, and Xiao-Jiang Hao. "A New Limonoid fromTrichilia connaroides." Zeitschrift für Naturforschung B 65, no. 6 (2010): 762–64. http://dx.doi.org/10.1515/znb-2010-0613.

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A new limonoid, trichiliton B (1), was isolated from the twigs and leaves of Trichilia connaroides. Its structure was elucidated on the basis of spectroscopic analyses, including application of ESI-MS, HR-ESI-MS, UV, IR, 1D and 2D NMR techniques

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