The authors regret the omission of supplementary fi les in the original artide.Download all supplementary fles included with this artide.The author would like to apologise for any inconvenience caused.
Singchia Z. J. Liu ＆ L. J. Chen, a new orchid genus, is established based on the new species S. malipoensis Z. J. Liu ＆ L. J. Chen found in southeast Yunnan, China. The new genus is related to Pteroceras, from which...Singchia Z. J. Liu ＆ L. J. Chen, a new orchid genus, is established based on the new species S. malipoensis Z. J. Liu ＆ L. J. Chen found in southeast Yunnan, China. The new genus is related to Pteroceras, from which it differs by having a lip with its basal margins immovably adnate to the lower part of the pendent column foot, a thin-walled spur, and very unequally and deeply split pollinia, each with a distinct caudicle. In addition to a discussion on Ascocentrum pusillum, a species of questionable placement, another new genus, namely Gunnaria S. C. Chen ex Z. J. Liu ＆ L. J. Chen, is set up and a new combination, namely G. pusilla （Aver.） Z. J. Liu ＆ L. J. Chen, is made. The new genus Gunnaria differs from its allyAscocentrum by having a cross-shaped pollinarium, sulcate or split pollinia, each with a distinct caudicle attached to a common linear stipe much longer than either pollinia or viscidium, and strongly incurved side lobes of the lip.展开更多
Type genus:Aclistochara Peck,1937 emend.Peck,1957 Diagnosis:Gyrogonites composed of five sinistral spiral cells,apicalpart truncated or contracted forming a short neck,summits flat.Spiralcells become distinctly thinne...Type genus:Aclistochara Peck,1937 emend.Peck,1957 Diagnosis:Gyrogonites composed of five sinistral spiral cells,apicalpart truncated or contracted forming a short neck,summits flat.Spiralcells become distinctly thinner and narrower in the apical periphery,formingapical peripheral depression of various depths.The apical centre is eithermarked by an apical rosette formed by inflation of spital ends,orl thin andflat when the spiral ends are not inflated,without apical orifice and utricle.展开更多
The Sihui Furniture General Factory issituated in the Sihui County Town ofGuangdong Province.It is a state-runenterprise with fixed assets of RMB 15 millionand 400 staff and workers. "Quality first and customers ...The Sihui Furniture General Factory issituated in the Sihui County Town ofGuangdong Province.It is a state-runenterprise with fixed assets of RMB 15 millionand 400 staff and workers. "Quality first and customers supreme"and"abiding by contracts and honouringpromises"are the factory’s aims.The factoryhas built up a reputation for its completequality inspection system,rigid quality controlprocess and warm after-sales service.Thefactory has been awarded the title ofGuangdong Provincial Advanced Enterprise. The Jiahui brand high-spring mattressis the factory’s major product.There are 210springs per square metre of the mattress.Each spring is heat-treated through展开更多
Dear Editor,Depending on the perceived threat in the environment,organisms can express a broad spectrum of behaviors,ranging from exploration to defensive behaviors[1,2],such as fear response and avoidance.Generalizat...Dear Editor,Depending on the perceived threat in the environment,organisms can express a broad spectrum of behaviors,ranging from exploration to defensive behaviors[1,2],such as fear response and avoidance.Generalization of fear memory can generate anxiety-related disorders that afflict 10%-30%of individuals worldwide,especially during the epidemic situation[3,4].展开更多
Monospecific and bispecific genera are of special concern as they represent unique phylogenetic/evolutionary trajectories within larger clades.In addition,as phylogenetically older taxa are supposed to be exposed to h...Monospecific and bispecific genera are of special concern as they represent unique phylogenetic/evolutionary trajectories within larger clades.In addition,as phylogenetically older taxa are supposed to be exposed to higher rarity and extinction risk,monospecific and bispecific genera may be intrinsically more prone to extinction risks than multispecies genera,although extinction risks also depend on the ecological and biological strategy of the species.Here,the distribution across biogeographical zones and the levels of threat to 2 speciose orders of mammals(monospecific and bispecific genera of Rodentia and Soricomorpha)are investigated in order to highlight major patterns at the worldwide scale.In Rodentia,39.7%of the genera(n=490)were monospecific and 17.9%were bispecific.In Soricomorpha,44.4%of the total genera(n=45)were monospecific and 15%were bispecific.There was a positive correlation between the number of monospecific genera and the total number of genera per family.Peaks of monospecific and bispecific genera richness were observed in Neotropical,Oriental and Afrotropical regions in rodents and in the Palearctic region in soricomorphs.Range size was significantly uneven across biogeographic region in rodents(with larger ranges in Nearctic and Oriental regions and smaller ranges in the Australian region),but there was no difference across biogeographic regions in terms of range size in soricomorphs.Most of the monospecific and bispecific genera occurred in forest habitat in both taxa.The frequency distribution of the monospecific and bispecific genera across IUCN categories did not differ significantly from the expected pattern using the total rodent genera and the multispecies genera.展开更多
Let D be a nonsquare integer and p be an odd prime with p(?)D. The equation x^2-D=p^n, x>0, n>0 (1) is usually called the generalized Ramanujan-Nagell equation. For this equation, there are many related works wr...Let D be a nonsquare integer and p be an odd prime with p(?)D. The equation x^2-D=p^n, x>0, n>0 (1) is usually called the generalized Ramanujan-Nagell equation. For this equation, there are many related works written by Alter and Kubota, Brown, Cohen and lnkeri. In this letter, we shall prove the展开更多
We use the Atiyah-Bott-Segal-Singer Lefschetz fixed point formula to calculate the Hirzebruch χy genus χy(S[n]), where S[n] is the Hilbert scheme of points of length n of a surface S. Combinatorial interpretation of...We use the Atiyah-Bott-Segal-Singer Lefschetz fixed point formula to calculate the Hirzebruch χy genus χy(S[n]), where S[n] is the Hilbert scheme of points of length n of a surface S. Combinatorial interpretation of the weights of the fixed points of the natural torus action on (C2)[n] is used. This is the first step to prove a conjectural formula about the elliptic genus of the Hilbert schemes.展开更多
In isotopic chronology, homogenization of the initial values has ever been a primary prerequisite for isochrons. However, theoretical consideration shows that isochrons can always be obtained if a closed system satisf...In isotopic chronology, homogenization of the initial values has ever been a primary prerequisite for isochrons. However, theoretical consideration shows that isochrons can always be obtained if a closed system satisfies the linear equation at its initial instant, i. e.,展开更多
More and more attention has been focused on ischemic-reperfusion injury of myocardium. The important role of free radicals (FRs) has been hypothesized in mediating the injury. To investigate the production and mechani...More and more attention has been focused on ischemic-reperfusion injury of myocardium. The important role of free radicals (FRs) has been hypothesized in mediating the injury. To investigate the production and mechanism of FRs generated from myocardium during ischemia and reperfusion, the spin trapping ESR technique was applied to展开更多
文摘The authors regret the omission of supplementary fi les in the original artide.Download all supplementary fles included with this artide.The author would like to apologise for any inconvenience caused.
基金supported financially by the National Program for Wild Life Conservation and Nature Reserve Construction,China,and by the Science & Technology Plan of Shenzhen,China (SYF 200646408).
文摘Singchia Z. J. Liu ＆ L. J. Chen, a new orchid genus, is established based on the new species S. malipoensis Z. J. Liu ＆ L. J. Chen found in southeast Yunnan, China. The new genus is related to Pteroceras, from which it differs by having a lip with its basal margins immovably adnate to the lower part of the pendent column foot, a thin-walled spur, and very unequally and deeply split pollinia, each with a distinct caudicle. In addition to a discussion on Ascocentrum pusillum, a species of questionable placement, another new genus, namely Gunnaria S. C. Chen ex Z. J. Liu ＆ L. J. Chen, is set up and a new combination, namely G. pusilla （Aver.） Z. J. Liu ＆ L. J. Chen, is made. The new genus Gunnaria differs from its allyAscocentrum by having a cross-shaped pollinarium, sulcate or split pollinia, each with a distinct caudicle attached to a common linear stipe much longer than either pollinia or viscidium, and strongly incurved side lobes of the lip.
文摘Type genus:Aclistochara Peck,1937 emend.Peck,1957 Diagnosis:Gyrogonites composed of five sinistral spiral cells,apicalpart truncated or contracted forming a short neck,summits flat.Spiralcells become distinctly thinner and narrower in the apical periphery,formingapical peripheral depression of various depths.The apical centre is eithermarked by an apical rosette formed by inflation of spital ends,orl thin andflat when the spiral ends are not inflated,without apical orifice and utricle.
文摘The Sihui Furniture General Factory issituated in the Sihui County Town ofGuangdong Province.It is a state-runenterprise with fixed assets of RMB 15 millionand 400 staff and workers. "Quality first and customers supreme"and"abiding by contracts and honouringpromises"are the factory’s aims.The factoryhas built up a reputation for its completequality inspection system,rigid quality controlprocess and warm after-sales service.Thefactory has been awarded the title ofGuangdong Provincial Advanced Enterprise. The Jiahui brand high-spring mattressis the factory’s major product.There are 210springs per square metre of the mattress.Each spring is heat-treated through
基金supported by grants from the National Natural Science Foundation of China(81870852 and 82171199)the Qing Lan Project of Jiangsu Province,the Education Department of Jiangsu Province(18KJA320007)+3 种基金the Natural Science Foundation of Jiangsu Province(BK20181146 and BK20210911)the Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX21_2706,KYCX21_2703,and YCX21_2717)the Program on Basic Research Projects of Xuzhou City(KC21048)the Special Funds for Anesthesia Medical Research of Jiangsu Medical Association SYH-32021-0040(2021035).
文摘Dear Editor,Depending on the perceived threat in the environment,organisms can express a broad spectrum of behaviors,ranging from exploration to defensive behaviors[1,2],such as fear response and avoidance.Generalization of fear memory can generate anxiety-related disorders that afflict 10%-30%of individuals worldwide,especially during the epidemic situation[3,4].
文摘Monospecific and bispecific genera are of special concern as they represent unique phylogenetic/evolutionary trajectories within larger clades.In addition,as phylogenetically older taxa are supposed to be exposed to higher rarity and extinction risk,monospecific and bispecific genera may be intrinsically more prone to extinction risks than multispecies genera,although extinction risks also depend on the ecological and biological strategy of the species.Here,the distribution across biogeographical zones and the levels of threat to 2 speciose orders of mammals(monospecific and bispecific genera of Rodentia and Soricomorpha)are investigated in order to highlight major patterns at the worldwide scale.In Rodentia,39.7%of the genera(n=490)were monospecific and 17.9%were bispecific.In Soricomorpha,44.4%of the total genera(n=45)were monospecific and 15%were bispecific.There was a positive correlation between the number of monospecific genera and the total number of genera per family.Peaks of monospecific and bispecific genera richness were observed in Neotropical,Oriental and Afrotropical regions in rodents and in the Palearctic region in soricomorphs.Range size was significantly uneven across biogeographic region in rodents(with larger ranges in Nearctic and Oriental regions and smaller ranges in the Australian region),but there was no difference across biogeographic regions in terms of range size in soricomorphs.Most of the monospecific and bispecific genera occurred in forest habitat in both taxa.The frequency distribution of the monospecific and bispecific genera across IUCN categories did not differ significantly from the expected pattern using the total rodent genera and the multispecies genera.
文摘Let D be a nonsquare integer and p be an odd prime with p(?)D. The equation x^2-D=p^n, x>0, n>0 (1) is usually called the generalized Ramanujan-Nagell equation. For this equation, there are many related works written by Alter and Kubota, Brown, Cohen and lnkeri. In this letter, we shall prove the
文摘We use the Atiyah-Bott-Segal-Singer Lefschetz fixed point formula to calculate the Hirzebruch χy genus χy(S[n]), where S[n] is the Hilbert scheme of points of length n of a surface S. Combinatorial interpretation of the weights of the fixed points of the natural torus action on (C2)[n] is used. This is the first step to prove a conjectural formula about the elliptic genus of the Hilbert schemes.
文摘In isotopic chronology, homogenization of the initial values has ever been a primary prerequisite for isochrons. However, theoretical consideration shows that isochrons can always be obtained if a closed system satisfies the linear equation at its initial instant, i. e.,
文摘More and more attention has been focused on ischemic-reperfusion injury of myocardium. The important role of free radicals (FRs) has been hypothesized in mediating the injury. To investigate the production and mechanism of FRs generated from myocardium during ischemia and reperfusion, the spin trapping ESR technique was applied to
