CET4 and CET6 (combined asCETsin thispaper) have played and are still playing undeniable rolesin motivating English teaching and learning as well as providing a unified standard according to which most universities an...CET4 and CET6 (combined asCETsin thispaper) have played and are still playing undeniable rolesin motivating English teaching and learning as well as providing a unified standard according to which most universities and colleges can compare with each other. However, in the recent years, a voice blaring their disadvantages has become louder and louder. This paper joins in the voice and expose their negative backwash effects on not only language education in colleges and universities but also on the activities of other institutions and organizations which are directly or indirectly involved in language training. This is what it means by"Language Education in a Broader Sense"in the title of this paper. Some improvements have been suggested in the end.展开更多
Rising temperatures and increased droughts caused by climate change significantly reduce crop yields.Halophytes with different photosynthetic metabolism types have specific mechanisms for resistance to climatic factor...Rising temperatures and increased droughts caused by climate change significantly reduce crop yields.Halophytes with different photosynthetic metabolism types have specific mechanisms for resistance to climatic factors.This study analyzed the morphophysiological,biochemical,and molecular-genetic mechanisms of tolerance and adaptation in halophytes,promising candidates for the restoration of salt affected lands in arid and semi-arid areas.Experiments under drought(D)and elevated temperature(eT),as well as their combined action(eT+D),were performed on Atriplex verrucifera M.Bied.(C_(3)plant)and Climacoptera crassa(M.Bieb.)Botsch.(C_(4)-NAD-ME plant)with different types of photosynthesis.The activity of photosystem I(PSI)and the efficiency of photosystem II(PSII)were measured,along with the expression of genes involved in the light(psaA,psaB,psbA,CAB,Fd1,PGR5,and ndhH)and dark(rbcL,Ppc2,and PPDK)reactions of photosynthesis.The content of key carboxylating enzymes ribulose-1,5-bisphosphate carboxylase/oxygenase(Rubisco)and phosphoenolpyruvate carboxylase(PEPC),as well as the photorespiration enzyme glycine decarboxylase(GDC),were assessed.Plant growth and water-salt balance parameters,and activity of enzymes in the malate dehydrogenase(MDH)system nicotinamide adenine dinucleotide(phosphate)(NAD(P))-MDH and NAD(P)-malic enzyme(ME)were also examined.A multivariate analysis of the experimental results revealed that A.verrucifera and C.crassa were both resistant to the effects of these climatic stressors.The tolerance mechanisms of both species were significantly influenced by a high level of photosynthetic plasticity.Nevertheless,differences were observed in the protective mechanisms underlying tolerance.In the C_(3)species,dissipative processes associated with non-photochemical quenching(NPQ)of PSII and MDH system enzymes(malate valves)were activated,particularly under osmotic stress.The negative effects in the C_(3)plants were caused by the combined action of eT+D,which was compensated by an increased expression of rbcL,psaA,CAB,and especially PGR5,i.e.,genes encoding Rubisco large subunit and PSI components:apoproteins A,chlorophyll a/b-associated protein(CAB)of light-harvesting complex,and proton gradient regulation 5(PGR5)protein of the main pathway of cyclic electron transport(CET)around PSI.In C_(4)species,the protective MDH complex was expressed to a lesser extent,but activation of the C_(4)carbon-concentrating mechanism(CCM)and upregulation of PGR5 expression were observed,particularly under the individual action of the factors.Under the combined stress of eT+D,C.crassa exhibited a synergistic effect,where the increase in NPQ level and NAD-ME activity,as well as decrease in NADP-ME activity was less pronounced compared with the effect of singular factors.Comparative physiological,biochemical,and molecular analyses of how C_(3)and C_(4)species response to individual and combined climatic factors provide new insights into sustainable plant adaptation strategies in the face of global climate change.Considering the high nutritional value of these two fodder species,a technological approach could be developed to improve the productivity of salt affected lands.展开更多
This study integrates gravity and aeromagnetic datasets to delineate basement depth and characterise the subsurface structural framework of the Gerad Graben in the western Sirt Basin,Libya.Techniques including high-pa...This study integrates gravity and aeromagnetic datasets to delineate basement depth and characterise the subsurface structural framework of the Gerad Graben in the western Sirt Basin,Libya.Techniques including high-pass filtering,Centre for Exploration Targeting(CET) edge detection,Source Parameter Imaging(SPI),and Euler Deconvolution(ED) were applied to residual gravity and residual reduced-topole(RTP) magnetic data to enhance fault mapping and basement morphology.Tests of various cutoff wavelengths show that 10 km for gravity and 15 km for magnetic data provide optimal resolution of shallow structures while preserving deeper trends.Forward 2D GM-SYS modelling and Werner Deconvolution further constrained the geometry and depth of intrusive bodies and fault systems.Results reveal a structurally complex graben with NE-SW,NW-SE,ENE-WSW,and N-S trending faults,indicating multiphase tectonic deformation.Graben-bounding faults show displacement values of600-4290 m,and basement depths in the central depocenter reach 4275-4300 m,validated by well NTF-50.Magnetic anomalies indicate intrusive igneous bodies,including NW-SE-trending sills and dikes,associated with the Tibesti and Al Haruj volcanic provinces.These intrusions likely caused localised heating,uplift,and fault reactivation.The integrated interpretation supports a tectonomagmatic evolution involving successive rifting phases from the Paleozoic to Cenozoic,influenced by inherited Precambrian structures.These features,coupled with substantial sediment infill and magmatic activity,enhance the hydrocarbon potential of the Gerad Graben,suggesting the presence of structural and stratigraphic traps within the broader of Sirt Basin petroleum system.展开更多
文摘CET4 and CET6 (combined asCETsin thispaper) have played and are still playing undeniable rolesin motivating English teaching and learning as well as providing a unified standard according to which most universities and colleges can compare with each other. However, in the recent years, a voice blaring their disadvantages has become louder and louder. This paper joins in the voice and expose their negative backwash effects on not only language education in colleges and universities but also on the activities of other institutions and organizations which are directly or indirectly involved in language training. This is what it means by"Language Education in a Broader Sense"in the title of this paper. Some improvements have been suggested in the end.
基金supported by the state assignment of Ministry of Science and Higher Education of the Russian Federation(122042700044-6)the Science and Technology Research Partnership for Sustainable Development(SATREPS)project(JPMJSA2001).
文摘Rising temperatures and increased droughts caused by climate change significantly reduce crop yields.Halophytes with different photosynthetic metabolism types have specific mechanisms for resistance to climatic factors.This study analyzed the morphophysiological,biochemical,and molecular-genetic mechanisms of tolerance and adaptation in halophytes,promising candidates for the restoration of salt affected lands in arid and semi-arid areas.Experiments under drought(D)and elevated temperature(eT),as well as their combined action(eT+D),were performed on Atriplex verrucifera M.Bied.(C_(3)plant)and Climacoptera crassa(M.Bieb.)Botsch.(C_(4)-NAD-ME plant)with different types of photosynthesis.The activity of photosystem I(PSI)and the efficiency of photosystem II(PSII)were measured,along with the expression of genes involved in the light(psaA,psaB,psbA,CAB,Fd1,PGR5,and ndhH)and dark(rbcL,Ppc2,and PPDK)reactions of photosynthesis.The content of key carboxylating enzymes ribulose-1,5-bisphosphate carboxylase/oxygenase(Rubisco)and phosphoenolpyruvate carboxylase(PEPC),as well as the photorespiration enzyme glycine decarboxylase(GDC),were assessed.Plant growth and water-salt balance parameters,and activity of enzymes in the malate dehydrogenase(MDH)system nicotinamide adenine dinucleotide(phosphate)(NAD(P))-MDH and NAD(P)-malic enzyme(ME)were also examined.A multivariate analysis of the experimental results revealed that A.verrucifera and C.crassa were both resistant to the effects of these climatic stressors.The tolerance mechanisms of both species were significantly influenced by a high level of photosynthetic plasticity.Nevertheless,differences were observed in the protective mechanisms underlying tolerance.In the C_(3)species,dissipative processes associated with non-photochemical quenching(NPQ)of PSII and MDH system enzymes(malate valves)were activated,particularly under osmotic stress.The negative effects in the C_(3)plants were caused by the combined action of eT+D,which was compensated by an increased expression of rbcL,psaA,CAB,and especially PGR5,i.e.,genes encoding Rubisco large subunit and PSI components:apoproteins A,chlorophyll a/b-associated protein(CAB)of light-harvesting complex,and proton gradient regulation 5(PGR5)protein of the main pathway of cyclic electron transport(CET)around PSI.In C_(4)species,the protective MDH complex was expressed to a lesser extent,but activation of the C_(4)carbon-concentrating mechanism(CCM)and upregulation of PGR5 expression were observed,particularly under the individual action of the factors.Under the combined stress of eT+D,C.crassa exhibited a synergistic effect,where the increase in NPQ level and NAD-ME activity,as well as decrease in NADP-ME activity was less pronounced compared with the effect of singular factors.Comparative physiological,biochemical,and molecular analyses of how C_(3)and C_(4)species response to individual and combined climatic factors provide new insights into sustainable plant adaptation strategies in the face of global climate change.Considering the high nutritional value of these two fodder species,a technological approach could be developed to improve the productivity of salt affected lands.
文摘This study integrates gravity and aeromagnetic datasets to delineate basement depth and characterise the subsurface structural framework of the Gerad Graben in the western Sirt Basin,Libya.Techniques including high-pass filtering,Centre for Exploration Targeting(CET) edge detection,Source Parameter Imaging(SPI),and Euler Deconvolution(ED) were applied to residual gravity and residual reduced-topole(RTP) magnetic data to enhance fault mapping and basement morphology.Tests of various cutoff wavelengths show that 10 km for gravity and 15 km for magnetic data provide optimal resolution of shallow structures while preserving deeper trends.Forward 2D GM-SYS modelling and Werner Deconvolution further constrained the geometry and depth of intrusive bodies and fault systems.Results reveal a structurally complex graben with NE-SW,NW-SE,ENE-WSW,and N-S trending faults,indicating multiphase tectonic deformation.Graben-bounding faults show displacement values of600-4290 m,and basement depths in the central depocenter reach 4275-4300 m,validated by well NTF-50.Magnetic anomalies indicate intrusive igneous bodies,including NW-SE-trending sills and dikes,associated with the Tibesti and Al Haruj volcanic provinces.These intrusions likely caused localised heating,uplift,and fault reactivation.The integrated interpretation supports a tectonomagmatic evolution involving successive rifting phases from the Paleozoic to Cenozoic,influenced by inherited Precambrian structures.These features,coupled with substantial sediment infill and magmatic activity,enhance the hydrocarbon potential of the Gerad Graben,suggesting the presence of structural and stratigraphic traps within the broader of Sirt Basin petroleum system.
