614 research outputs found
Microbial diversity of a sulfide black smoker in main endeavour hydrothermal vent field, Juan de Fuca Ridge
No full textAmphinemura retusilobata Mo & Wang & Yang & Li & Murányi 2020, sp. n.
No full textAmphinemura retusilobata sp. n. (Figs. 1–4) Diagnosis. Male: tergum IX with short spines, tergum X with long spines, epiproct with apically notched lateral processes that are shorter than median process, paraproctal outer lobe slender, median lobe flat in lateral view and the tip strongly outcurved in dorsal view. Female: pregenital plate large and dark, subgenital plate bicolored and posteriorly bilobed with deep and wide medial indentation, inner genitalia with a pair of stripe-like medial sclerites. Male habitus (Figs. 1 a–1b). Body color brown to dark brown. Head and mouthparts dark brown; antennae brown, and palpi paler; compound eyes black; head wider than pronotum; pronotum brown, rectangular with obscure rugosities, but pronotum of older or well-sclerotized specimens, trapezoidal with distinct dark brown markings; legs brown. Wing membranes subhyaline, veins brown. Abdominal segments light brown with darker terminalia. Male (Figs. 1–3). Forewing length 5.2–5.4 mm, hind wing length 4.3–4.4 mm. Tergum IX sclerotized, rather constricted medially, with triangular anterior and posterior indentations, and with two groups of tiny black spines and several long bristles present along posterior margin (Figs. 2a, 2c, 3a, 3c). Slender vesicle of sternum IX claviform, length 4.2X maximum width, constricted basally and slightly constricted medially. Hypoproct rectangular basally, gradually narrowing toward nipple-like tip (Figs. 2 b–2c, 3b–3c). Tergum X sclerotized, a membranous concavity present below the epiproct, bearing two groups of strong black spines on either sides of the epiproct. Cercus slightly sclerotized, cylindrical and weakly curved inward, as long as 2.5X width. Epiproct (Figs. 2a, 2 c–2d, 3a, 3c–3d,) subrectangular, trifurcate with a slender median process and a pair of lateral processes, the median process much longer than bifid lateral processes. Dorsal sclerite with a broadly oval, membranous basal half; lateral processes strongly sclerotized, straight but apically slightly outcurved and downcurved, apex with several small denticles and an outer semicircular lobe, tip blunt. Ventral sclerite light colored but sclerotized, triangular, tapering toward tip; apical half up-curved but bent downward apically in lateral view; ventrally expanding into a triangular ridge with a row of small black spines. Paraproct trilobed (Figs. 1 c–1d, 2, 3a–3c): inner lobe triangular, moderately long; median lobe long, the apical half strongly sclerotized in a triangular stripe ending in acute spine, apex strongly curved upwards, bear 0–2 black, long spines medially and numerous long spines along its membranous tip, seems rotated in dorsal view; outer lobe slender, sclerotized and slightly curved outward with a black, long spine at tip but the spine may lacking. Female (Fig. 4). Forewing length 6.0– 6.7 mm, hind wing length 5.1–5.8 mm. Sternum VII produced in a large, darkly sclerotized semicircular pregenital plate, covering anterior portion of subgenital plate. Sternum VIII forms bilobed subgenital plate with a deep medial indentation; the plate is lightly sclerotized medially, while lateral parts and the posterior lobes are dark. Paragenital plate paired, forming banded brownish lobe connected with posterolateral corner of subgenital plate. Sternum IX trapezoidal, full sclerotized. Paraprocts brown, wide triangular with blunt, rounded tip; cerci brownish, short. Inner genitalia (Fig. 4d) mostly membranous, inverted triangular, opening under the forked medial indention of the subgenital plate; a pair of stripe-like medial sclerites present beneath the apical tube that leads into oviductus; medial sclerites linked to medial portion of subgenital plate; apical tube distinctly sclerotized at base. Type Material. Holotype: male (HIST), China: Guangdong Province, Maoming City, Xinyi City, Dacheng Town, Yunkaishan National Natural Reserve, the bridge next to the security office at the entrance to the reserve, 966 m, 22º16'34" N, 111º11'43" E, 2018.X.4, light trap, Raorao Mo, Fengping Qin, Wei Liu, Shuai Tang. Paratypes: 2 males, 2 females (HIST), same locality and date as holotype; 10 males, 2 females (HIST), Yunkaishan National Natural Reserve, the river at the gate of the reserve, 987 m, 22º16’34”N, 111º11’43”E, 2018.X.5, Raorao Mo, Fengping Qin, Wei Liu, Shuai Tang; 4 males (GXU), 2 males (HNHM), 8 females (HIST), same locality, 2018. X.4, Raorao Mo, Fengping Qin, Wei Liu, Shuai Tang; 1 teneral male with weakly developed paraproct, Guangxi Zhuang Autonomous Region, Nanning City, Wuming County, Liangjiang Town, Neichao, Longmugou River, 220 m, 23°29′40”N, 108°21′37”E, 2015.III.24, Junyi Li, Shan Li, Weihai Li, Dávid Murányi; same section of Long-mugou River, 198 m, 23°29′39”N, 108°21′36”E, 2020.V.18, Raorao Mo, Yan Lai, Yingying Mo; 1 female, lower section of Longmugou River, 194 m, 23°29′33”N, 108°21′29”E, 2020.V.19, Raorao Mo, Yan Lai, Yingying Mo; 1 female, lower section of Longmugou River, 186 m, 23°29′57”N, 108°21′21”E, 2020.V.21, Raorao Mo, Yan Lai, Yingying Mo. Etymology. The name refers to the lateral processes of the male epiproct with an apical notch. Latin “retusus” means notch, and “lobus” means projection. Distribution and ecology. The new species is known from southern China, the type series was collected from low and medium elevations of two isolated mountain systems of Guangdong and Guangxi Provinces. The two mountain ranges are separated nearly by 300 km. Collected in foothill and medium elevation habitats, A. retusilobata is expected occur more widely in southern China. The type locality in Guangdong is a variable stony stream with dense riparian vegetation (Figs. 9 a–c). In Guangxi, the specimens were collected from the Longmugou River, a small foothill stream (Fig. 9d). Its upper section habitat was described and illustrated in Mo et al. (2019b: Fig. 10d), under the name Neichao River. Remarks. The new species is a distinctive member of the A. sinensis group, only resembling A. viet Stark & Sivec, 2010, a species described from northern Vietnam. The two species share a similar tergum X, inner paraproct lobe, ventral sclerite of epiproct, and dorsal sclerite of epiproct that is armed with an outer apical notch on the lateral processes. However, A. retusilobata can be easily separated from A. viet by the median lobe of paraproct which is flat in lateral view and the tip strongly outcurved in dorsal view, the median process of epiproct is much longer than lateral processes and the bifid lateral processes are having blunt apex (Figs. 1 c–1d, 2–3). In A. viet, the median lobe of paraproct is slightly club-shaped in lateral view, and swollen outside of the tip in dorsal view; median process and lateral processes subequal in length, and the lateral processes with an acute apex (figs. 24–26, Stark & Sivec 2010). In addition, outer paraproctal lobes of A. viet may be obscure, not mentioned or figured in the original description by Stark & Sivec (2010). The outer paraproct lobes of A. retusilobata are slender, distinctly sclerotized, usually with a black apical spine. The female is less distinctive, but can be identified by the combination of presence of large and dark pregenital plate, bicolored and posteriorly widely bilobed subgenital plate, and a pair of stripe–like medial sclerites of the inner genitalia.Published as part of Mo, Raorao, Wang, Guoquan, Yang, Ding, Li, Weihai & Murányi, Dávid, 2020, Two new species of the Amphinemura sinensis group (Plecoptera: Nemouridae) from southern China, pp. 337-350 in Zootaxa 4820 (2) on pages 338-342, DOI: 10.11646/zootaxa.4820.2.7, http://zenodo.org/record/439776
Compound control method of neutral point voltage of three level NPC inverter based on the vector method of virtual space and hysteresis control
No full textInsights into Current Tropomyosin Receptor Kinase (TRK) inhibitors:\ud development and clinical application
No full textThe use of kinase-directed precision medicine has been heavily pursued since the discovery and development of\ud
imatinib. Annually, it is estimated that around ∼20 000 new cases of tropomyosin receptor kinase (TRK) cancers are diagnosed,\ud
with the majority of cases exhibiting a TRK genomic rearrangement. In this Perspective, we discuss current development and\ud
clinical applications for TRK precision medicine by providing the following: (1) the biological background and significance of\ud
the TRK kinase family, (2) a compilation of known TRK inhibitors and analysis of their cocrystal structures, (3) an overview of\ud
TRK clinical trials, and (4) future perspectives for drug discovery and development of TRK inhibitors
Amphinemura simifleurdelia Mo & Wang & Yang & Li & Murányi 2020, sp. n.
No full textAmphinemura simifleurdelia sp. n. (Figs. 5–8) Diagnosis. Male: terga IX–X with short spines, epiproct with apically outcurved and downcurved lateral processes and slightly longer, apically upcurved median process, paraproctal median lobe long and apically with a black spine, outer lobe heavily sclerotized and with double apical spines. Female: pregenital plate pale, subgenital plate subquadrate and bicolored with small posteromedial indentation, inner genitalia with a short and stripe-like medial sclerite. Male habitus (Figs. 5 a–5b). Body color brown to dark brown. Head and mouthparts dark brown; antennae brown, and palpi paler; compound eyes black; head wider than pronotum; pronotum brown with paler lateral edges, rectangular with obscure rugosities but older or well sclerotized specimens with distinct dark brown markings; legs brown, femora paler. Wing membranes subhyaline, veins brown. Abdominal segments light brown with darker terminalia. Male (Figs. 5–7). Forewing length 5.3–5.5 mm, hind wing length 4.3–4.5 mm. Tergum IX heavily sclerotized, but lateral area lighter, with subtriangular anterior and posterior indentations, and with two groups of tiny black spines and several long bristles present along mid-posterior margin. (Figs. 6a, 6c, 7a, 7c). Slender vesicle of sternum IX claviform, length 3.0X maximum width, basally and medially constricted. Hypoproct rectangular basally, gradually narrowing toward nipple-like tip (Figs. 6 b–6c, 7b–7c). Tergum X darkly sclerotized, a membranous concavity present below the epiproct, and with two groups of short, black spines on either sides of the epiproct. Cercus slightly sclerotized, short, cylindrical, weakly curved inward, about as long as 2.5X width. Epiproct (Figs. 6a, 6 c–6d, 7a, 7c–7d) subrectangular, trifurcate with a median process and a pair of horn-like lateral processes, the median process slightly longer than lateral processes. Dorsal sclerite with a rectangular membranous basal half; horn-like lateral processes strongly sclerotized, apically outcurved and downcurved with several denticles on both sides of the blunt tip. Ventral sclerite dark and strongly sclerotized, subtriangular in dorsal view, broad at base, tapering toward tip, slightly up-curved apically in lateral view, expanded ventrally into a small ridge with rows of tiny black spines. Paraproct trilobed (Figs. 5 c–5e, 6a–6c, 7a–7c): inner lobe sclerotized, triangular and moderately long; median lobe long and narrow, distinctly sclerotized, strongly curved upward and outward, apically with a black spine in membranous, slightly swollen tip; outer lobe slender and heavily sclerotized, distinctly curved outward apically, and with two short black apical spines. Female (Fig. 8). Forewing length 6.5–6.7 mm, hind wing length 5.5–5.8 mm. Sternum VII produced in a weakly sclerotized semicircular pregenital plate slightly covering anterior half of subgenital plate. Sternum VIII forms sclerotized subquadrate subgenital plate with a triangular anterior notch, posteriorly directed triangular medial area pale and lightly sclerotized, contrasting the mostly dark brown plate. Paragenital plate paired, forming subquadrate brown lobes connected with posterolateral corner of subgenital plate. Sternum IX weakly sclerotized, trapezoidal. Paraprocts short and wide triangular, with blunt tip; cerci short and pale. Inner genitalia (Fig. 8d) membranous, opening under the posteromedial notch of the subgenital plate, having a basal pouch, a pair of leaf-shaped lateromedial sclerites attached above the pouch, and an apical cone; The pouch is armed with a short, longitudinal sclerite well seen by transparency through the subgenital plate; apical cone membranous with an apical circular sclerite ring. Type Material. Holotype: male (HIST), China: Guangdong Province, Maoming City, Xinyi City, Dacheng Town, Yunkaishan National Natural Reserve, the bridge next to the security office at the entrance to the reserve, 966 m, 22º16'34" N, 111º11'43" E, 2018.X.4, light trap, Raorao Mo, Fengping Qin, Wei Liu, Shuai Tang. Paratypes: 5 males, 4 females (HIST), same locality and date as holotype; 3 males, 1 female (HIST), Yunkaishan National Natural Reserve, the river at the gate of the reserve, 987 m, 22º16’34”N, 111º11’43”E, 2018.X.5, Raorao Mo, Fengping Qin, Wei Liu, Shuai Tang; 5 males, 5 females (GXU), 2 males, 2 females (HNHM), same locality, 2018.X.4, Raorao Mo, Fengping Qin, Wei Liu, Shuai Tang. Etymology. The specific epithet refers to the similarity to the closely related A. fleurdelia (Wu, 1949). Distribution and ecology. The new species is known from southern China, the type series was collected from a stream at medium elevations of the isolated mountain systems of the Yunkaishan National Natural Reserve, Guangdong Province. Amphinemura simifleurdelia was collected together with A. retusilobata from the same habitat (Figs. 9 a–c), but not in Neichao, the other known locality of that species, suggesting perhaps a more restricted distribution of A. simifleurdelia. Remarks. The new species belongs to the A. sinensis group and closely resembles A. fleurdelia (Wu, 1949). The two species share the following characteristics: tergum X has a pair of paramedial groups of short spines, inner paraproct lobes triangular and outer lobe of paraproct strongly curved outward apically, with two black, short spines. However, ventral sclerite of epiproct is nearly straight in lateral view with slightly upcurved tip, and median paraproct lobes only slightly swollen with a distinct black apical spine in A. simifleurdelia. In A. fleurdelia, apical ventral sclerite of epiproct distinctly curved downward in lateral view and apical median paraproct lobes global with several tiny spines. At a lesser extent, the new species is also resembles A. elongata Li, Yang & Sivec, 2005b from Zhejiang Province in the tergum X, inner and outer paraproct lobes, and ventral sclerite of epiproct in lateral view, but the new species can be separated from A. elongata by the approximately equal length of median and lateral processes of epiproct and slender median paraproct lobes. In A. elongata, the median process is distinctly longer than lateral processes of epiproct, and median paraproct lobes are medially twisted. Amphinemura fleurdelia, A. elongata and A. simifleurdelia may be a species complex within the A. sinensis species group. Amphinemura fleurdelia is also present in Guangdong, specimens were described and illustrated by Li et al. (2005b: Figs. 6 –11). Discovery of further populations are needed to evaluate morphological and genetic variability within the complex, but distinction at species level seems reasonable, since several specimens in the known populations explain stable morphological characters. A single male, deposited in the National Museum Prague (Guangdong, Nanling National Nature Reserve, Dadongshan, border of mixed forest, 690 m, 24°56.0’ N, 112°42.9’ E, 2013.IV.18–21, collected at light, J. Hájek, J. Růžička), may represents a further species, distinguished by several spines on the outer lobe of the paraproct and shorter median process of the epiproct. However, this taxon will not be described until additional specimens become available for study.Published as part of Mo, Raorao, Wang, Guoquan, Yang, Ding, Li, Weihai & Murányi, Dávid, 2020, Two new species of the Amphinemura sinensis group (Plecoptera: Nemouridae) from southern China, pp. 337-350 in Zootaxa 4820 (2) on pages 343-346, DOI: 10.11646/zootaxa.4820.2.7, http://zenodo.org/record/439776
Design of Multifunction Vehicle Bus Controller
No full textInternational audienceThe Train Communication Network (TCN) is widely used in highspeed train. However, its core technology - Multifunction Vehicle Bus Controller (MVBC) is owned by foreign companies, which limits the development of high-speed railway in China. Based on the principle of Multifunction Vehicle Bus(MVB), and analysis of real-time protocol and functions of bus controller to be achieved, this paper describes the design of MVBC which is divided into seven modules, Encoder, Decoder, Telegram Analysis Unit(TAU), Configuration Memory, Traffic Memory Controller(TMC), Arbitrator and Microprocessor Control Unit(MCU). And then it designs each module with VHDL in the integrated development environment of Quartus Π developed by Altera Company. A new MVBC is developed with FPGA. The test shows that it can take place of MVBC Application Specific Integrated Circuits (ASIC)
Stability and changes in astaxanthin ester composition from Haematococcus pluvialis during storage
No full textIn this paper, we investigated the effects of temperature, oxygen, antioxidants, and corn germ oil on the stability of astaxanthin from Haematococcus pluvialis under different storage conditions, and changes in the composition of astaxanthin esters during storage using high performance liquid chromatography and spectrophotometry. Oxygen and high temperatures (22-25 degrees C) significantly reduced the stability of astaxanthin esters. Corn germ oil and antioxidants (ascorbic acid and vitamin E) failed to protect astaxanthin from oxidation, and actually significantly increased the instability of astaxanthin. A change in the relative composition of astaxanthin esters was observed after 96 weeks of long-term storage. During storage, the relative amounts of free astaxanthin and astaxanthin monoesters declined, while the relative amount of astaxanthin diesters increased. Thus, the ratio of astaxanthin diester to monoester increased, and this ratio could be used to indicate if astaxanthin esters have been properly preserved. If the ratio is greater than 0.2, it suggests that the decrease in astaxanthin content could be higher than 20%. Our results show that storing algal powder from H. pluvialis or other natural astaxanthin products under vacuum and in the dark below 4 degrees C is the most economical and applicable storage method for the large-scale production of astaxanthin from H. pluvialis. This storage method can produce an astaxanthin preservation rate of at least 80% after 96 weeks of storage
A gadolinium (III)–containing complex based on nitronyl nitroxide ligand: Structure and magnetic property study
No full textThe synthesis of astaxanthin esters, independent of the formation of cysts, highly correlates with the synthesis of fatty acids in Haematococcus pluvialis
No full textThe compositions and contents of astaxanthin esters and fatty acids in four types of Haematococcus pluvialis cells were studied by HPLC and GC-MS. Results showed that the synthesis and accumulation of astaxanthin was independent of the formation of cysts, but was highly correlated with the synthesis and accumulation of fatty acids, though it is an well known phenomenon that the accumulation of astaxanthin is usually accompanied by the formation of cyst. The red cysts contain more than 30% of fatty acids, with 81% of the unsaturated fatty acids. Taken together, besides a resource of astaxanthin, H. pluvialis would be a good resource of valuable fatty acids
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