114,618 research outputs found
Dai palazzi medievali ai musei universitari
No full textEditoriale at V 5 (2023)Editoriale al V 5 (2023
Monumenti e musei, immagini e liturgie!
No full textEditorial to V.3 (2021)Editoriale al V.3 (2021
PENGARUH RASIO PELARUT KLOROFORM (V/V) PADA EKSTRAKSI TRIMIRISTIN BIJI PALA (MYRISTICA FRAGRANS HOUTT)
No full textBuah Pala (Myristica Fragans Houtt) merupakan salah satu tanaman penghasil minyak atsiri dikenal dengan minyak pala. Trimiristin dapat digunakan sebagai minyak makan dalam makanan dan menyerap kotoran dalam sedian kosmetik. Tujuan penelitian ini adalah mencari pengaruh perbandingan jumlah kloroform dan bubuk biji pala terhadap rendemen trimiristin dan mengidentifikasi. Dalam penelitian ini diamati pengaruh variasi perbandingan bubuk biji pala dan jumlah kloroform 1:5, 1:7, 1:9, 1:11, 1:13 (v/v) dengan waktu ekstraksi 3 hari. Peralatan yang digunakan adalah wadah maserasi, dan hotplate. Metode analisa yang dilakukan adalah menghitung rendemen, mengidentifikasi trimiristin menggunakan FTIR (Fourier Transform Infrared). Variasi perbandingan kloroform dan bubuk biji pala menghasilkan rendemen kristal trimiristin 5,20%, 6,50%, 7,66%, 8,23%, 7,45%. Berdasarkan data hasil penelitian dilakukan regresi terhadap rendemen kristal trimiristin maka didapatkan hasil persamaan y = -0,0655x2 + 1,2891x + 1,8369 dengan R2 = 0,9906. Dimana x adalah perbandingan jumlah kloroform terhadap bubuk biji pala dan y adalah rendemen. FTIR menunjukkan adanya gugus C=O pada bilangan gelombang 1734,69 – 1735,01 cm-1, gugus CH3 terdapat pada bilangan gelombang 1390,03 – 1390,16 cm-1, gugus CH2 terdapat pada bilangan gelombang adalah 1472,3cm-1 dan gugus C-H pada bilangan gelombang 2848,05 – 2953,09cm-1. Hasil ini menunjukkan gliserida. Trimiristin merupakan golongan trigliserida. Kata kunci: biji pala, ekstraksi, kloroform, trimiristi
Mitogenomes from Two Uncommon Haplogroups Mark Late Glacial/Postglacial Expansions from the Near East and Neolithic Dispersals within Europe
No full textThe current human mitochondrial (mtDNA) phylogeny does not equally represent all human populations but is biased in favour of representatives originally from north and central Europe. This especially affects the phylogeny of some uncommon West Eurasian haplogroups, including I and W, whose southern European and Near Eastern components are very poorly represented, suggesting that extensive hidden phylogenetic substructure remains to be uncovered. This study expanded and re-analysed the available datasets of I and W complete mtDNA genomes, reaching a comprehensive 419 mitogenomes, and searched for precise correlations between the ages and geographical distributions of their numerous newly identified subclades with events of human dispersal which contributed to the genetic formation of modern Europeans. Our results showed that haplogroups I (within N1a1b) and W originated in the Near East during the Last Glacial Maximum or pre-warming period (the period of gradual warming between the end of the LGM, ~19 ky ago, and the beginning of the first main warming phase, ~15 ky ago) and, like the much more common haplogroups J and T, may have been involved in Late Glacial expansions starting from the Near East. Thus our data contribute to a better definition of the Late and postglacial re-peopling of Europe, providing further evidence for the scenario that major population expansions started after the Last Glacial Maximum but before Neolithic times, but also evidencing traces of diffusion events in several I and W subclades dating to the European Neolithic and restricted to Europe
Exploiting Hetero-Junctions to Improve the Performance of III-V Nanowire Tunnel-FETs
No full textThis paper presents full-quantum 3-D simulations predicting the electrical performance of nanowire tunnel-FETs based on III-V hetero-junctions. Our calculations exploit an eight-band k.p Hamiltonian within the nonequilibrium Green's functions formalism and include phonon scattering. It is shown that the on-current of GaSb/InAs hetero-junction tunnel-FETs is limited by quantum confinement effects on the bandstructure induced by the small nanowire diameter necessary to preserve an optimal electrostatic integrity at short gate lengths. To circumvent this problem, additional on-current improvements with no substantial subthreshold swing degradation can be achieved by engineering the source region through the insertion of an InAs/GaSb/InAs quantum well along the transport direction. Such a design option is predicted to provide on/off-current ratios larger than 10(7) even at V-DD = 300 mV
Advantages and difficulties of using spatial enablement to support public health in cities: The pulse case study
No full textBig cities are heterogeneous environments in which socioeconomic and environmental differences among the neighborhoods are pronounced, therefore research projects that aim at informing public health policies at a single city level are being developed. Since most of public health data is referred to some geography, spatial enablement plays a fundamental role when it comes to analysis and visualization of urban health data. The PULSE project, part of the EU Horizon 2020 framework, involves five cities to transform public health from a reactive to a predictive system, and promote wellbeing by developing an integrated data ecosystem based on continuous large-scale collection of information, leading to better-informed data-driven health policy. One of the goals of PULSE is to apply spatial enablement to generate statistics useful to asses public health at a high spatial resolution, allowing to organize interventions at a neighborhood level. In this paper, we present a preliminary spatial enablement study carried out in this context, in which we show opposite sides of its application: while the results are promising, the lack of standardization and protocols in the data collection and representation processes make spatial enablement very difficult to apply to open data
The sail-backed reptile Ctenosauriscus from the latest Early Triassic of Germany and the timing and biogeography of the early archosaur radiation
No full textBackground
Archosaurs (birds, crocodilians and their extinct relatives including dinosaurs) dominated Mesozoic continental ecosystems from the Late Triassic onwards, and still form a major component of modern ecosystems (>10,000 species). The earliest diverse archosaur faunal assemblages are known from the Middle Triassic (c. 244 Ma), implying that the archosaur radiation began in the Early Triassic (252.3–247.2 Ma). Understanding of this radiation is currently limited by the poor early fossil record of the group in terms of skeletal remains.
Methodology/Principal Findings
We redescribe the anatomy and stratigraphic position of the type specimen of Ctenosauriscus koeneni (Huene), a sail-backed reptile from the Early Triassic (late Olenekian) Solling Formation of northern Germany that potentially represents the oldest known archosaur. We critically discuss previous biomechanical work on the ‘sail’ of Ctenosauriscus, which is formed by a series of elongated neural spines. In addition, we describe Ctenosauriscus-like postcranial material from the earliest Middle Triassic (early Anisian) Röt Formation of Waldhaus, southwestern Germany. Finally, we review the spatial and temporal distribution of the earliest archosaur fossils and their implications for understanding the dynamics of the archosaur radiation.
Conclusions/Significance
Comprehensive numerical phylogenetic analyses demonstrate that both Ctenosauriscus and the Waldhaus taxon are members of a monophyletic grouping of poposauroid archosaurs, Ctenosauriscidae, characterised by greatly elongated neural spines in the posterior cervical to anterior caudal vertebrae. The earliest archosaurs, including Ctenosauriscus, appear in the body fossil record just prior to the Olenekian/Anisian boundary (c. 248 Ma), less than 5 million years after the Permian–Triassic mass extinction. These earliest archosaur assemblages are dominated by ctenosauriscids, which were broadly distributed across northern Pangea and which appear to have been the first global radiation of archosaurs
- Individuazione di attività illegali di pesca a strascico all'interno della Baia di Porto Conte (Sardegna NW
No full textauthor-bios-SRD-19-0063.R1 – Supplemental material for The Network Structure of Police Misconduct
No full textSupplemental material, author-bios-SRD-19-0063.R1 for The Network Structure of Police Misconduct by George Wood, Daria Roithmayr and Andrew V. Papachristos in Socius</p
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