The family Dipteromantispidae, previously with only two genera and three species, is one of the enigmatic groups of the Cretaceous Neuroptera by the mantispid-like appearance combined with strongly reduced hind wings ...The family Dipteromantispidae, previously with only two genera and three species, is one of the enigmatic groups of the Cretaceous Neuroptera by the mantispid-like appearance combined with strongly reduced hind wings specialized into a haltere-like structure. A new genus and species of Dipteromantispidae, namely Halteriomantispa grimaldii gen. et sp. nov., is herein described based on an exquisitely preserved specimen from the mid-Cretaceous amber of northern Myanmar. It represents the first record of Dipteromantispidae from the amber deposit of mid-Cretaceous （Albian-Cenomanian） of Myanmar. A brief discussion on the homology of forewing venations and female genital sclerites of Dipteromantispidae is given.展开更多
A rapid and sensitive liquid chromatography tandem mass spectrometry method was established and validated for determination of melatonin in dog plasma using desvenlafaxine as an internal standard (IS). Plasma samples ...A rapid and sensitive liquid chromatography tandem mass spectrometry method was established and validated for determination of melatonin in dog plasma using desvenlafaxine as an internal standard (IS). Plasma samples were pretreated by liquid–liquid extraction with ethyl acetate. Chromatographic separation was carried out on a C18 column at a flow rate of 0.2 ml/min by an isocratic mobile phase of methanol : 5 m M ammonium acetate : formic acid (40:60:0.1, v/v/v). Positive ion mode detection was performed using multiple reaction monitoring (MRM) at m/z 233.2→174.2 for melatonin and m/z 264.2→58.2 for desvenlafaxine.The method was linear in the concentration range of 0.020–10 ng/ml with a correlation coefficient ≥0.996. The intra-and inter-assay precision (%RSD) values were within 12.6% (LLOQ15.2%), and accuracy (%RE) ranged from -1.8% to 5.0% (LLOQ ±16.5%). The total analysis time was 3.0 min. The method was fully validated and successfully applied to a pharmacokinetic study of melatonin prolonged-release tablet in Beagle dogs. The values of half-life and Tmax were similar to the corresponding data reported before.展开更多
A new dustywing genus and species, namely Cretaconiopteryx grandis gen. ＆ sp. nov., from the mid-Cretaceous amber of Myanmar is herein described in the lacewing family Coniopterygidae. The new genus is distinguished ...A new dustywing genus and species, namely Cretaconiopteryx grandis gen. ＆ sp. nov., from the mid-Cretaceous amber of Myanmar is herein described in the lacewing family Coniopterygidae. The new genus is distinguished from all other dustywing species by the combination of following morphological features： relatively large body-size, comparatively rich crossvenation, origin of RP＋MA near wing base in both fore-and hindwing, forewing RA and RP terminally fused into a loop, and proximally zig-zagged forewing Cu P. A new subfamily, Cretaconiopteryginae subfam. nov., is erected based on this spectacular new genus. The new subfamily might represent the basalmost lineage of known coniopterygids.展开更多
Two new genus-group names and two new species-group names of the lacewing superfamily Psychopsoidea from the mid-Cretaceous amber of Myanmar are herein validated, namely Fiaponeurapenghiani gen. ＆ sp. nov. and Burmop...Two new genus-group names and two new species-group names of the lacewing superfamily Psychopsoidea from the mid-Cretaceous amber of Myanmar are herein validated, namely Fiaponeurapenghiani gen. ＆ sp. nov. and Burmopsychops limoae gen. ＆ sp. nov.展开更多
基金supported by the National Natural Science Foundation of China(31322501,41271063)
文摘The family Dipteromantispidae, previously with only two genera and three species, is one of the enigmatic groups of the Cretaceous Neuroptera by the mantispid-like appearance combined with strongly reduced hind wings specialized into a haltere-like structure. A new genus and species of Dipteromantispidae, namely Halteriomantispa grimaldii gen. et sp. nov., is herein described based on an exquisitely preserved specimen from the mid-Cretaceous amber of northern Myanmar. It represents the first record of Dipteromantispidae from the amber deposit of mid-Cretaceous （Albian-Cenomanian） of Myanmar. A brief discussion on the homology of forewing venations and female genital sclerites of Dipteromantispidae is given.
文摘A rapid and sensitive liquid chromatography tandem mass spectrometry method was established and validated for determination of melatonin in dog plasma using desvenlafaxine as an internal standard (IS). Plasma samples were pretreated by liquid–liquid extraction with ethyl acetate. Chromatographic separation was carried out on a C18 column at a flow rate of 0.2 ml/min by an isocratic mobile phase of methanol : 5 m M ammonium acetate : formic acid (40:60:0.1, v/v/v). Positive ion mode detection was performed using multiple reaction monitoring (MRM) at m/z 233.2→174.2 for melatonin and m/z 264.2→58.2 for desvenlafaxine.The method was linear in the concentration range of 0.020–10 ng/ml with a correlation coefficient ≥0.996. The intra-and inter-assay precision (%RSD) values were within 12.6% (LLOQ15.2%), and accuracy (%RE) ranged from -1.8% to 5.0% (LLOQ ±16.5%). The total analysis time was 3.0 min. The method was fully validated and successfully applied to a pharmacokinetic study of melatonin prolonged-release tablet in Beagle dogs. The values of half-life and Tmax were similar to the corresponding data reported before.
基金supported by the National Natural Science Foundation of China(31672322,31322501)
文摘A new dustywing genus and species, namely Cretaconiopteryx grandis gen. ＆ sp. nov., from the mid-Cretaceous amber of Myanmar is herein described in the lacewing family Coniopterygidae. The new genus is distinguished from all other dustywing species by the combination of following morphological features： relatively large body-size, comparatively rich crossvenation, origin of RP＋MA near wing base in both fore-and hindwing, forewing RA and RP terminally fused into a loop, and proximally zig-zagged forewing Cu P. A new subfamily, Cretaconiopteryginae subfam. nov., is erected based on this spectacular new genus. The new subfamily might represent the basalmost lineage of known coniopterygids.
文摘Two new genus-group names and two new species-group names of the lacewing superfamily Psychopsoidea from the mid-Cretaceous amber of Myanmar are herein validated, namely Fiaponeurapenghiani gen. ＆ sp. nov. and Burmopsychops limoae gen. ＆ sp. nov.
