A taxonomic review of the Acrotona Thomson in Korea is presented. The genus is represented in Korea by 10 speciesincluding two new species, A. koreana Lee & Ahn, sp. nov. and A. rufescens Lee & Ahn, sp. nov. Two other species,A. paeksongrica Paśnik and A. suyangsani Paśnik, are synonymized under A. pseudotenera (Cameron) and A. lutulenta(Sharp), respectively, and four species, A. grata (Cameron), A. lutulenta (Sharp), A. pseudotenera (Cameron) and A. vicaria(Kraatz), are identified for the first time in South Korea. A key to the Korean species and illustrations of habitus anddiagnostic characters are provided for the new species.
The present study investigated the role of spinal glutamate recycling in the development of orofacial inflammatory pain or trigeminal neuropathic pain. Experiments were carried out on male Sprague–Dawley rats weighing between 230 and 280 g. Under anesthesia, a polyethylene tube was implanted in the atlanto-occipital membrane for intracisternal administration. IL-1β-induced inflammation was employed as an orofacial acute inflammatory pain model. IL-1β (10 ng) was injected subcutaneously into one vibrissal pad. We used the trigeminal neuropathic pain animal model produced by chronic constriction injury of the infraorbital nerve. DL-threo-β -benzyloxyaspartate (TBOA) or methionine sulfoximine (MSO) was administered intracisternally to block the spinal glutamate transporter and the glutamine synthetase activity in astroglia. Intracisternal administration of TBOA produced mechanical allodynia in naïve rats, but it significantly attenuated mechanical allodynia in rats with interleukin (IL)-1 β-induced inflammatory pain or trigeminal neuropathic pain. In contrast, intracisternal injection of MSO produced antiallodynic effects in rats treated with IL-1β or with infraorbital nerve injury. Intracisternal administration of MSO did not produce mechanical allodynia in naive rats. These results suggest that blockade of glutamate recycling induced pro-nociception in naïve rats, but it paradoxically resulted in anti-nociception in rats experiencing inflammatory or neuropathic pain. Moreover, blockade of glutamate reuptake could represent a new therapeutic target for the treatment of chronic pain conditions.
This study examines the titles of poetry in order to analogize the original landscape of Byeolseo garden in Korea and China. This study analyzed the titles of Soswaewon 48 Poems and Humble Administrator’s Garden 31 Poems, comparing the form of the compositional form and the landscape elements of titles conveyed in them. The titles of the Soswaewon 48 Poems and the Humble Administrator’s Garden 31 Poems are made up of combinations of places, activities, meanings, and landscape elements. Soswaewon 48 Poems are composed of 「Landscape Elements + Landscape Elements」 and 「Place + Activity」, while Humble Administrator’s Garden 31 Poems are composed of 「Place + Meaning」 and 「Landscape Elements + Landscape Elements」. The Soswaewon 48 Poems clearly show the element of activity, whereas the Humble Administrator’s Garden 31 Poems show the element of meaning, which is different. Landscape elements that appear in the titles of both show more physical than symbolic elements. However, symbolic elements appear more in Humble Administrator’s Garden 31 Poems than Soswaewon 48 Poems. This is a characteristic of Chinese culture that valued Yijing, giving meaning to each component of the garden. Among physical elements, natural elements appeared more frequently in the Soswaewon 48 Poems than in the Humble Administrator’s Garden 31 Poems, whereas artificial elements appeared more in the Humble Administrator’s Garden 31 Poems.
In the present work, we apply a technique that has been used for the expansion of graphite to multiwall carbon nanotubes (MWCNT). The nanotubes are rapidly heated for a short duration, followed by immersion in acid solution, so that they undergo expansion. The diameter of the expanded CNTs is 5-10 times larger than that of the asreceived nanotubes. This results in considerable swelling of the CNTs and opening of the tube tips, which may facilitate the accessibility of lithium ions into the inner holes and the interstices between the nanotube walls. The Li-ion storage capacity of the expanded nanotubes is measured by using the material as an anode in Li-ion cells. The result show that the discharge capacity of the expanded nanotubes in the first cycle is as high as 2,160 mAh/g, which is about 28% higher than that of the un-treated MWCNT anode. However, the charge/discharge capacity quickly drops in subsequent cycles and finally reaches equilibrium values of ~370 mAh/g. This is possibly due to the destruction of the lattice structures by repeated intercalation of Li ions.
Carbon nanofiber (CNF) is used as an electrode material for electrical double layer capacitors (EDLCs), and is being consistently researched to improve its electrochemical performance. However, CNF still faces important challenges due to the low mesopore volume, leading to a poor high-rate performance. In the present study, we prepared the unique architecture of the activated mesoporous CNF with a high specific surface area and high mesopore volume, which were successfully synthesized using PMMA as a pore-forming agent and the KOH activation. The activated mesoporous CNF was found to exhibit the high specific surface area of 703 m2 g−1, total pore volume of 0.51 cm3 g−1, average pore diameter of 2.9 nm, and high mesopore volume of 35.2 %. The activated mesoporous CNF also indicated the high specific capacitance of 143 F g−1, high-rate performance, high energy density of 17.9-13.0Wh kg−1, and excellent cycling stability. Therefore, this unique architecture with a high specific surface area and high mesopore volume provides profitable synergistic effects in terms of the increased electrical double-layer area and favorable ion diffusion at a high current density. Consequently, the activated mesoporous CNF is a promising candidate as an electrode material for high-performance EDLCs.
The pea aphid Acyrthosiphom pisum (Harris) (Hemiptera: Aphididae) is a pestiferous species with a worldwide distribution. We investigated the development periods and survivorship of A. pisum nymph, and longevity and fecundity of A. pisum adult. The study was conducted at five constant temperatures of 10, 15, 20, 25, and 30°C. Higher temperature threshold (TH) and lower temperature threshold (TL) were calculated by two nonlinear functions. The temperature range of A. pisum from TL to TH using empirical model (29.29) was wider than that using biophysiological model (21.85). The adult emergence frequency of A. pisum over full range of constant temperatures was simulated using developmental rat
The cowpea aphid Aphis craccivora Koch (Hemiptera: Aphididae) is an important pest on several species of legumes. We investigated the development periods and survivorship of A. craccivora nymph, and longevity and fecundity of A. craccivora adult. The study was conducted at five constant temperatures of 10, 15, 20, 25, and 30°C, respectively. The lower developmental threshold (LDT) and thermal constant (K) of A. craccivora nymph stage were estimated by linear regression. Higher temperature threshold (TH) and lower temperature threshold (TL) were calculated by biophysiological model. Developmental completion of A. craccivora nymph stage was described using a two-parameter Weibull distribution model. Life table parameters were estimated by the jackknife method.
In the present study, we investigated the role of peripheral ionotropic receptors in artemin-induced thermal hyperalgesia in the orofacial area. Male Sprague-Dawley rats weighting 230 to 280 g were used in the study. Under anesthesia, a polyethylene tube was implanted in the subcutaneous area of the vibrissa pad, which enabled drug-injection. After subcutaneous injection of artemin, changes in air-puff thresholds and head withdrawal latency time were evaluated. Subcutaneous injection of artemin (0.5 or 1 μg) produced significant thermal hyperalgesia in a dose-dependent manner. However, subcutaneous injection of artemin showed no effect on air-puff thresholds. IRTX (4 μg), a TRPV1 receptor antagonist, D-AP5 (40 or 80 μg), an NMDA receptor antagonist, or NBQX (20 or 40 μg), an AMPA receptor antagonist, was injected subcutaneously 10 min prior to the artemin injection. Pretreatment with IRTX and D-AP5 significantly inhibited the artemin-induced thermal hyperalgesia. In contrast, pretreatment with both doses of NBQX showed no effect on artemin-induced thermal hyperalgesia. Moreover, pretreatment with H-89, a PKA inhibitor, and chelerythrine, a PKC inhibitor, decreased the artemin-induced thermal hyperalgesia. These results suggested that artemin-induced thermal hyperalgesia is mediated by the sensitized peripheral TRPV1 and NMDA receptor via activation of protein kinases.