922 research outputs found
STUDY OF TWO MEDICINAL HERBS LEUCAS ASPERA AND CISTUS LAURIFOLIUS FOR THEIR PROSTAGLANDIN INHIBITORY AND ANTIOXIDANT COMPONENTS
研究科: 千葉大学大学院医学薬学府学位:千大院医薬博甲第薬6
2011 University Of New England College Of Osteopathic Medicine Fellowship Recipients
2011 recipients of the University of New England College of Osteopathic Medicine\u27s Peter Morgane Research Fellowship (known then as the Dean’s Research Fellowship)
Chemical functionalization of graphene oxide for improving mechanical and thermal properties of polyurethane composites
Graphene oxide (GO) was chemically functionalized to manufacture polyurethane (PU) composites with improved mechanical and thermal properties. In order to achieve a well exfoliated and stable GO suspension in organic solvent, 4, 4′- methylenebis(phenyl isocyanate) and polycaprolactone diol – two monomers used to synthesize polyurethane – were employed to functionalize GO sequentially. The obtained functionalized GO (FGO) could form homogeneous dispersions in DMF solvent and the PU matrix, as well as provide a good compatibility with the latter. The most efficient improvement in mechanical properties was achieved when 0.4 wt% FGO was added into the PU matrix, corresponding to increases in the tensile stress, elongation at break and toughness by 34.2%, 27.6% and 64.5%, respectively (compared with those of PU). Regarding the thermal stability, FGO/PU 1 wt% showed the largest enhancement, with T2% and T50% 16 °C and 21 °C higher than those for PU, respectively. A significant improvement in both mechanical properties and thermal stability of FGO/PU composites should be attributed to homogeneous dispersion of FGO in the PU matrix and strong interfacial interaction between them
MAKET KRATON PLERED CIRCA : 1675
Maket ini berusaha mengangkat suatu program yang subjeknya cukup menantang yakni, Kraton Plered yang keberadaannya sekarang sudah hancur rata dengan tanah. Pertimbangan kurikuler historis didaktis tetap menjadi acuan seleksi subjek model dan dilakukan secara objektif saintifik, Tentatif Historis Imajinasi Berdasarkan Kesaksian Sejarah
Tujuan Penelitian ini adalah sebuah analisis historis pertumbuhan dan perkembangan Kraton Plered serta merupakan visualisasi Kraton Plered beserta lingkungan sekitarnya pada masa Kasultanan Amangkurat Agung (I).
Penelitian ini menggunakan metode sejarah yakni, diawali dari penentuan subjek, perumusan problema, survai, pengumpulan sumber, analisa sumber, kesimpulan sementara dan berakhir dengan seminar umum, follow up hasil seminar, disimpulkan dalam bentuk grafis (peta, diagram, Chart, denah, irisan, tampak depan, samping, dan atas) "BLUEPRINT". Berdasarkan blueprint, kerja fisik pembuatan maket dilakukan, yang meliputi langkah memotong, merakit, memasang dan finishing.
Hasil penelitian merupakan rekonstruksi sebuah model tiga dimensi berupa maket Kraton Plered beserta kelengkapannya, seperti ilustrasi, fotografi, poster, peta, makalah, bibliografi, dokumen, audio visual, dan sebagainya. Kesemuanya untuk sementara disimpan di Ruang Disply Laboratorium Sejarah, FKIP Unversitas PGRI Yogyakarta, Kampus Unit I lantai I gedung B
A Remarkable New Species of <i>Liparis</i> (Orchidaceae) from China and Its Phylogenetic Implications
<div><p>In the present study, we formally describe <i>Liparis pingxiangensis</i> as a new species from Guangxi, China on the basis of morphological and molecular phylogenetic analyses. It is easily distinguished from closely related species by strongly curved column without column wings, and broadly rhombic-elliptic lip with 2 uncinate calli at the base. In particular, it differs most markedly from its congeners in possessing two pollinia attached by long and prominent caudicles (not stipes), to a distinct sticky disc. This type of pollinarium, as far as we know, is not found in any other species of <i>Liparis</i>, and is also unique among the orchids with waxy pollinia. We then proceeded to a phylogenetic analysis to ascertain the systematic position of this enigmatic species. Molecular study based on nuclear ribosomal ITS and plastid <i>mat</i>K DNA sequence data supports <i>L. pingxiangensis</i> as a distinct species, which forms an independent lineage sister to <i>L. nervosa</i> and its allies (93% BS, 1.00 BPP). In the light of previous work, the findings have important implications for a better understanding of the well-supported pattern mainly based on vegetative features in Malaxideae.</p></div
Morphology of <i>Liparis pingxiangensis</i> (A–D, G) and allied species <i>L. nervosa</i> (E–F).
<p>A. inflorescence, B. flower, front view, C. flower, lateral view, D. gynostemium including anther, clinandrium and viscidium attached to apex of rostellum, lateral view, E. two pairs of close pollinia, F. two pairs of separate pollinia, G. pollinarium including pollinia, caudicles and viscidium. Scale bars, 3(B–C); 1 mm (D); 0.3 mm (E–G).</p
Liparis pingxiangensis.
<p>A. habit, B. flower, frontal view, C. flower, lateral view, D. bract, E. dorsal sepal, F. petal, G. lateral sepal, H. lip, I. column, lateral view, J. column without anther cap, ventral view, K. anther cap, L. pollinarium. Drawn by Yun-Xiao Liu.</p
Phylogenetic tree.
<p>Strict consensus tree of the 1932 most parsimonious trees obtained from sequences of the combined nrITS and plastid <i>mat</i>K DNA sequence data (2280 steps, CI = 0.53, RI = 0.89), showing the position of <i>Liparis pingxiangensis</i>. Parsimony bootstrap proportions higher than 50% and Bayesian posterior probabilities (BPP) more than 0.95 are shown above and below branches, respectively.</p
Ultrastretchable and Self-Healing Double-Network Hydrogel for 3D Printing and Strain Sensor
On the basis of the thermoreversible
sol–gel transition behavior of κ-carrageenan in water,
a double-network (DN) hydrogel has been fabricated by combining an
ionically cross-linked κ-carrageenan network with a covalently
cross-linked polyacrylamide (PAAm) network. The κ-carrageenan/PAAm
DN hydrogel demonstrated an excellent recoverability and significant
self-healing capability (even when notched). More importantly, the
warm pregel solution of κ-carrageenan/AAm can be used as an
ink of a three-dimensional (3D) printer to print complex 3D structures
with remarkable mechanical strength after UV exposure. Furthermore,
the κ-carrageenan/PAAm DN hydrogel exhibited a great strain
sensitivity with a gauge factor of 0.63 at the strain of 1000%, and
thus, the hydrogel can be used as sensitive strain sensors for applications
in robotics and human motion detection
Cenozoic drainage evolution of the Rio Grande paleoriver recorded in detrital zircons in South Texas
<p>Sediment provenance in the lower reach of rivers is important in reconstructing paleogeography and linking continental tectonic and climate changes with sedimentation in continental margins. This study presents 1300 new detrital zircon U–Pb ages from seven latest Eocene–Miocene sandstone and one modern river sand samples in south Texas and integrates these new data with published detrital zircon data to elucidate the evolution of the Rio Grande paleoriver during the Cenozoic. The new data contain a major population of the Cordillera magmatic province (22–280 Ma) and populations older than 280 Ma that were mostly recycled from sedimentary cover in the southern Rocky Mountains and southern Great Plains. The latest Eocene–Oligocene sandstones contain abundant air-fall zircons, and their detrital zircon maximum depositional ages constrain depositional ages. The changes in detrital zircon age distributions suggest that the paleoriver has changed its drainage extent three times, including a late Eocene drainage reduction by cutting off sediment supply from the west, a late Oligocene drainage reduction to the east of the southern Rocky Mountains and expansion to the East Mexico Arc in northeastern Mexico, and a latest Neogene drainage expansion to the west of the Rio Grande Rift and southern Colorado.</p
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