Ethyldiamine bridged dimer permethy-β-CD and other cyclodextrins were used as GC stationary phase to resolute DL-pantolactone. It is found that this CD dimer has a good selectivity for DL-pantolactone.
Through the comparison of each kind of crops in Kangbao County, it is concluded that there are remarkable differences among the benefits of different kinds of crops. Local farmers are very conservative, first thinking...Through the comparison of each kind of crops in Kangbao County, it is concluded that there are remarkable differences among the benefits of different kinds of crops. Local farmers are very conservative, first thinking to meet their own demands and then trading for money. Renting lots of agricultural machines has been becoming the most effective cost, which not only improved agricultural productivity, but also increased farmers' income.展开更多
In sewage sludge composting, adding ash from stove （FA20） inactivated active Cu effectively and the results were significantly better than control. For Zn, Mn, Pb and Cd, satisfying results was,achieved by adding as...In sewage sludge composting, adding ash from stove （FA20） inactivated active Cu effectively and the results were significantly better than control. For Zn, Mn, Pb and Cd, satisfying results was,achieved by adding ash from stove and phosphorite powder （FA20, PR10）, phosphorite powder and lime （PR15, CL10）, ash from stove and phosphorite powder （FA10, PR10）, and ash from stove and peat （FA20, PT 10）. Based on their effects of inactivating available forms of heavy metals, ash from stove, phosphorite powder and peat were supposed to be effective inactivators with optimum percentages of 20%, 15% and 10% （FA20, PR15, PT10）.展开更多
Effects of core polarization and tensor coupling on the magnetic moments in A^13 C, A^17O, and A^41 Ca A-hypernuclei are studied by employing the Dirac equation with scalar, vector and tensor potentials. It is found t...Effects of core polarization and tensor coupling on the magnetic moments in A^13 C, A^17O, and A^41 Ca A-hypernuclei are studied by employing the Dirac equation with scalar, vector and tensor potentials. It is found that the effect of core polarization on the magnetic moments is suppressed by A tensor coupling. The A tensor potential reduces the spin-orbit splitting of pA states considerably. However, almost the same magnetic moments are obtained using the hyperon wavefunction obtained via the Dirac equation either with or without the A tensor potential in the electromagnetic current vertex. The deviations of magnetic moments for PA states from the Schmidt values are found to increase with nuclear mass number.展开更多
Farm tourism with recreational farm industry （RFI） is often considered as an economic alternative for farmers who are facing decreasing profits and might require another form of revenue. Compared with other industri...Farm tourism with recreational farm industry （RFI） is often considered as an economic alternative for farmers who are facing decreasing profits and might require another form of revenue. Compared with other industries, the most obvious advantage and benefit of RFI are not only economic incentives but environmental sustainability. Due to the increase in governmental income and global economic recession, RFI became an important way to broaden profit base for many governments. Recently, the successful RFI development in Taiwan is well-known. This research discussed the situation and main advantages of RFI, and mainly reviews RFI development/communicative strategies in Taiwan as a case study. This research finds the key success factors are： building the single window service scheme, development of creative value, build up the marketing routes of leisure industries scheme, improve the quality and service of recreational farming products scheme, and putting into series advertisement.展开更多
Hypernuclear magnetic moment and ∧-N interaction in ^17 ∧ O has been studied within relativistic mean field theory. Without core polarization, the relativistic results are found to fit the Schmidt value well and no...Hypernuclear magnetic moment and ∧-N interaction in ^17 ∧ O has been studied within relativistic mean field theory. Without core polarization, the relativistic results are found to fit the Schmidt value well and not be sensitive to ∧-N interaction. The relativistic magnetic moment is enhanced with nearly equal contributions of the relativistic and free masses. When ∧ hyperon occupies the l=0 or l=1 orbit, the effect of ∧-N interaction on the magnetic moment of valence proton is different.展开更多
Using F2 population derived from the cross of tall inbred 7922 by dwarf inbred 5003, an RFLP linkage map of maize has been constructed, on which 85 markers are distributed among 10 linkage groups and span maize genome...Using F2 population derived from the cross of tall inbred 7922 by dwarf inbred 5003, an RFLP linkage map of maize has been constructed, on which 85 markers are distributed among 10 linkage groups and span maize genome about 1827.8 cM with an average distance (24.4 cM) between markers. 106 F2:3 lines of the population were grown in a 10×11 simple rectangular lattice design of one-raw plots with two replications and evaluated for plant height (PH). With interval mapping procedure, 5 QTLs controlling plant height have been identified and their genetic effects and gene action determined. 2 major OTLs with opposite effect have been discovered. One for increasing plant height is ph 1 which is located at chromosome 2 and accounts for 51.8% of the total phenotypic variation; the other for decreasing plant height is ph3 which is located at chromosome 5 and accounts for 38.6% of the total phenotypic variation. The chromosomal location of ph3 might be the same as or close to the position of bv1, a dwarf mutant展开更多
Superoxide dismutase (SOD) activity in the leaves of transgenic tobacco plants with betaine aldehyde dehydrogenase (BADH) gene was about 36% higher than that in the control plants (parent plants), activities of per-ox...Superoxide dismutase (SOD) activity in the leaves of transgenic tobacco plants with betaine aldehyde dehydrogenase (BADH) gene was about 36% higher than that in the control plants (parent plants), activities of per-oxidase (POD) and catalase (Cat) increased by about 62% and 88% respectively. Activities of ascorbate peroxidase (AsSPOD), dehydroascorbate redutase (DAsAR) and glu-tathione reductase (GR) in ascorbate-glutothion pathway located at chloroplasts increased by 67.7%, 47.9% and 38.8% respectively. These results indicated that the H2O2 produced by SOD catalyzing superoxide anion radicals (O2-) could be fully decomposed, and could not derive to form the strongest toxicant radicals · OH. This is the first report to elucidate quantitatively that the activities of two kinds of antioxidative enzymes decomposed radicals and active oxygen were matched. Photoinhibition tolerant capacity of the transgenic tobacco plants was 35% higher than that in the parent plants. Increment of photoinhibition tolerant展开更多
Trypanosoma evansi is the causative agent of the animal trypanosomiasis surra, a disease with serious economic burden worldwide. The availability of the genome of its closely related parasite Trypanosoma brucei allows...Trypanosoma evansi is the causative agent of the animal trypanosomiasis surra, a disease with serious economic burden worldwide. The availability of the genome of its closely related parasite Trypanosoma brucei allows us to compare their genetic and evolutionarily shared and distinct biological features. The complete genomic sequence of the T. evansi YNB strain was obtained using a combination of genomic and transcriptomic sequencing, de novo assembly, and bioinformatic analysis. The genome size of the T. evansi YNB strain was 35.2 Mb, showing 96.59% similarity in sequence and 88.97% in scaffold alignment with T. brucei. A total of 8,617 protein-coding genes, accounting for 31% of the genome, were predicted. Approximately 1,641 alternative splicing events of 820 genes were identified, with a majority mediated by intron retention, which represented a major difference in post-transcriptional regulation between T. evansi and T. brucei. Disparities in gene copy number of the variant surface glycoprotein, expression site-associated genes, microRNAs, and RNA-binding protein were clearly observed between the two parasites. The results revealed the genomic determinants of T. evansi, which encoded specific biological characteristics that distinguished them from other related trypanosome species.展开更多
Three new species of Nepalomyia henanensis species group are described from China, N. damingshanus sp. nov., iV. dongae sp. nov., and N. shennongfiaensis sp. nov. A key to known species of this species group is presen...Three new species of Nepalomyia henanensis species group are described from China, N. damingshanus sp. nov., iV. dongae sp. nov., and N. shennongfiaensis sp. nov. A key to known species of this species group is presented.展开更多
It is out of question that China has achieved considerable advancements in science and technology. The worldwide spread of ＂Made in China＂ that gets on the western countries＇ nerves is a good illustration. However,...It is out of question that China has achieved considerable advancements in science and technology. The worldwide spread of ＂Made in China＂ that gets on the western countries＇ nerves is a good illustration. However, although comparatively better than some other developing countries, we have to face the situation that science and technology in such a great nation as China is still seriously lagged behind, lacking great breakthroughs and top-ranking masters and leaders. That＇s why we feel uneasy in front of international colleagues.展开更多
Ecosystem health assessment is one of the most important issues in regional ecological quality and safety studies.It also has a great significance to ecological conservation and regional development.This study focused...Ecosystem health assessment is one of the most important issues in regional ecological quality and safety studies.It also has a great significance to ecological conservation and regional development.This study focused on assessing the health status of forest,agriculture and urban ecosystems in the southwestern Beijing,China,including the Fangshan and Fengtai Districts.Based on field surveys and data collection,an assessment index system containing the vigor,organization and resilience factors was developed to measure the ecosystem health.Each index was scored from 1 to 5,representing five levels that contribute to the whole ecosystem health.The analytic hierarchy process(AHP)method was used to measure the weights of each index and three factors,and thus an overall score for a certain ecosystem was calculated.The results show that the forest ecosystem in the Fangshan District had higher health value than the Fengtai District,while the urban ecosystem had a slightly lower value in the Fangshan District than the Fengtai District.Both districts show lower resilience values in forest and urban ecosystems.Maintaining the ecosystem health will definitely benefit the long-term development of two districts.This study suggested that an approach for assessing the regional ecosystem health could be further developed to address spatial and synergy relationships between ecosystems and the three health factors.展开更多
Food security is a global concern in view of the ongoing global （social and climate） change. The challenges to food securityfrom global change, sharply increasing food and feed demands, whereas increasing the freque...Food security is a global concern in view of the ongoing global （social and climate） change. The challenges to food securityfrom global change, sharply increasing food and feed demands, whereas increasing the frequency and severity of stresses,coupled with degradation and scarcity of natural resources, are indeed urgent and real （Prasanna et al. 2013）. Crop productionmust double by 2050 to meet future production demands （Tilman et al. 2011）. The ability to achieve this increaserepresents a significant challenge to plant breeders. Crop yields must increase at a rate of 2.47o per year, yet the averagerate of increase is only 1.3% with yields stagnating in up to 40% of land under cereal production （Ray et al. 2012, 2013）. Therefore,crops with higher yield potential and more resistant to abiotic stress conditions are needed to address such challenges.展开更多
It was identified that there were 4 St chromosomes derived from Th, intermedium in common wheat-Th. intermedium alien additional line TAI-27 by in situ hybridization. Two St chromosomes added to wheat chromosome in TA...It was identified that there were 4 St chromosomes derived from Th, intermedium in common wheat-Th. intermedium alien additional line TAI-27 by in situ hybridization. Two St chromosomes added to wheat chromosome in TAI-27 as well as two of them replaced two of 42 in wheat chromosomes. This indicates that TAI-27 is not only an alien additional line, but also a replacing line. The additional chromosomes in TAI-27 were microdissected and a microcloning library was constructed. A special probe of Th. intermedium was obtained from a microcloning library. The sequence analysis indicated that there were no homology with Genebank data. This makes it possible to screen genes with the disease-resistance, adversity-tolerance and fine character from Th.intermedium.展开更多
文摘Ethyldiamine bridged dimer permethy-β-CD and other cyclodextrins were used as GC stationary phase to resolute DL-pantolactone. It is found that this CD dimer has a good selectivity for DL-pantolactone.
文摘Through the comparison of each kind of crops in Kangbao County, it is concluded that there are remarkable differences among the benefits of different kinds of crops. Local farmers are very conservative, first thinking to meet their own demands and then trading for money. Renting lots of agricultural machines has been becoming the most effective cost, which not only improved agricultural productivity, but also increased farmers' income.
文摘In sewage sludge composting, adding ash from stove （FA20） inactivated active Cu effectively and the results were significantly better than control. For Zn, Mn, Pb and Cd, satisfying results was,achieved by adding ash from stove and phosphorite powder （FA20, PR10）, phosphorite powder and lime （PR15, CL10）, ash from stove and phosphorite powder （FA10, PR10）, and ash from stove and peat （FA20, PT 10）. Based on their effects of inactivating available forms of heavy metals, ash from stove, phosphorite powder and peat were supposed to be effective inactivators with optimum percentages of 20%, 15% and 10% （FA20, PR15, PT10）.
基金Supported by the National Basic Research Programme of China under Grant No 2007CB815000, the National Natural Science Foundation of China under Grant Nos 10435010, 10775004 and 10221003, the National Research Foundation of South Africa under Grant No 2054166, and the Scientific Research Foundation of Chinese Agriculture University under Grant No 2007005.
文摘Effects of core polarization and tensor coupling on the magnetic moments in A^13 C, A^17O, and A^41 Ca A-hypernuclei are studied by employing the Dirac equation with scalar, vector and tensor potentials. It is found that the effect of core polarization on the magnetic moments is suppressed by A tensor coupling. The A tensor potential reduces the spin-orbit splitting of pA states considerably. However, almost the same magnetic moments are obtained using the hyperon wavefunction obtained via the Dirac equation either with or without the A tensor potential in the electromagnetic current vertex. The deviations of magnetic moments for PA states from the Schmidt values are found to increase with nuclear mass number.
文摘Farm tourism with recreational farm industry （RFI） is often considered as an economic alternative for farmers who are facing decreasing profits and might require another form of revenue. Compared with other industries, the most obvious advantage and benefit of RFI are not only economic incentives but environmental sustainability. Due to the increase in governmental income and global economic recession, RFI became an important way to broaden profit base for many governments. Recently, the successful RFI development in Taiwan is well-known. This research discussed the situation and main advantages of RFI, and mainly reviews RFI development/communicative strategies in Taiwan as a case study. This research finds the key success factors are： building the single window service scheme, development of creative value, build up the marketing routes of leisure industries scheme, improve the quality and service of recreational farming products scheme, and putting into series advertisement.
文摘Hypernuclear magnetic moment and ∧-N interaction in ^17 ∧ O has been studied within relativistic mean field theory. Without core polarization, the relativistic results are found to fit the Schmidt value well and not be sensitive to ∧-N interaction. The relativistic magnetic moment is enhanced with nearly equal contributions of the relativistic and free masses. When ∧ hyperon occupies the l=0 or l=1 orbit, the effect of ∧-N interaction on the magnetic moment of valence proton is different.
文摘Using F2 population derived from the cross of tall inbred 7922 by dwarf inbred 5003, an RFLP linkage map of maize has been constructed, on which 85 markers are distributed among 10 linkage groups and span maize genome about 1827.8 cM with an average distance (24.4 cM) between markers. 106 F2:3 lines of the population were grown in a 10×11 simple rectangular lattice design of one-raw plots with two replications and evaluated for plant height (PH). With interval mapping procedure, 5 QTLs controlling plant height have been identified and their genetic effects and gene action determined. 2 major OTLs with opposite effect have been discovered. One for increasing plant height is ph 1 which is located at chromosome 2 and accounts for 51.8% of the total phenotypic variation; the other for decreasing plant height is ph3 which is located at chromosome 5 and accounts for 38.6% of the total phenotypic variation. The chromosomal location of ph3 might be the same as or close to the position of bv1, a dwarf mutant
基金the Stale Key BasicResearch Developmental Program of China (Grant No. (11999011700) and the Natural Science Foundation of Shandong (Gram No. Y9X02037).
文摘Superoxide dismutase (SOD) activity in the leaves of transgenic tobacco plants with betaine aldehyde dehydrogenase (BADH) gene was about 36% higher than that in the control plants (parent plants), activities of per-oxidase (POD) and catalase (Cat) increased by about 62% and 88% respectively. Activities of ascorbate peroxidase (AsSPOD), dehydroascorbate redutase (DAsAR) and glu-tathione reductase (GR) in ascorbate-glutothion pathway located at chloroplasts increased by 67.7%, 47.9% and 38.8% respectively. These results indicated that the H2O2 produced by SOD catalyzing superoxide anion radicals (O2-) could be fully decomposed, and could not derive to form the strongest toxicant radicals · OH. This is the first report to elucidate quantitatively that the activities of two kinds of antioxidative enzymes decomposed radicals and active oxygen were matched. Photoinhibition tolerant capacity of the transgenic tobacco plants was 35% higher than that in the parent plants. Increment of photoinhibition tolerant
基金supported by grants of the National Key Research and Development Program of China (2017YFD0500400 and 2017YFD0501200)the National Natural Science Foundation of China (81420108023 and 81772219)distinguished scientist grant from Shenyang Agricultural University
文摘Trypanosoma evansi is the causative agent of the animal trypanosomiasis surra, a disease with serious economic burden worldwide. The availability of the genome of its closely related parasite Trypanosoma brucei allows us to compare their genetic and evolutionarily shared and distinct biological features. The complete genomic sequence of the T. evansi YNB strain was obtained using a combination of genomic and transcriptomic sequencing, de novo assembly, and bioinformatic analysis. The genome size of the T. evansi YNB strain was 35.2 Mb, showing 96.59% similarity in sequence and 88.97% in scaffold alignment with T. brucei. A total of 8,617 protein-coding genes, accounting for 31% of the genome, were predicted. Approximately 1,641 alternative splicing events of 820 genes were identified, with a majority mediated by intron retention, which represented a major difference in post-transcriptional regulation between T. evansi and T. brucei. Disparities in gene copy number of the variant surface glycoprotein, expression site-associated genes, microRNAs, and RNA-binding protein were clearly observed between the two parasites. The results revealed the genomic determinants of T. evansi, which encoded specific biological characteristics that distinguished them from other related trypanosome species.
基金partly supported by the 973 Program(2013CB127602)Special Fund for Agro-scientific Research in the Public Interest(201103002)
文摘Three new species of Nepalomyia henanensis species group are described from China, N. damingshanus sp. nov., iV. dongae sp. nov., and N. shennongfiaensis sp. nov. A key to known species of this species group is presented.
文摘It is out of question that China has achieved considerable advancements in science and technology. The worldwide spread of ＂Made in China＂ that gets on the western countries＇ nerves is a good illustration. However, although comparatively better than some other developing countries, we have to face the situation that science and technology in such a great nation as China is still seriously lagged behind, lacking great breakthroughs and top-ranking masters and leaders. That＇s why we feel uneasy in front of international colleagues.
基金project of Environ-mental Impact Assessment of Regional Development in the Southwest Beijing,sponsored by Environmental Protection Bureau of BeijingTsinghua-Alcoa foundation project of The Sustainable Development in Rural Area of China.
文摘Ecosystem health assessment is one of the most important issues in regional ecological quality and safety studies.It also has a great significance to ecological conservation and regional development.This study focused on assessing the health status of forest,agriculture and urban ecosystems in the southwestern Beijing,China,including the Fangshan and Fengtai Districts.Based on field surveys and data collection,an assessment index system containing the vigor,organization and resilience factors was developed to measure the ecosystem health.Each index was scored from 1 to 5,representing five levels that contribute to the whole ecosystem health.The analytic hierarchy process(AHP)method was used to measure the weights of each index and three factors,and thus an overall score for a certain ecosystem was calculated.The results show that the forest ecosystem in the Fangshan District had higher health value than the Fengtai District,while the urban ecosystem had a slightly lower value in the Fangshan District than the Fengtai District.Both districts show lower resilience values in forest and urban ecosystems.Maintaining the ecosystem health will definitely benefit the long-term development of two districts.This study suggested that an approach for assessing the regional ecosystem health could be further developed to address spatial and synergy relationships between ecosystems and the three health factors.
文摘Food security is a global concern in view of the ongoing global （social and climate） change. The challenges to food securityfrom global change, sharply increasing food and feed demands, whereas increasing the frequency and severity of stresses,coupled with degradation and scarcity of natural resources, are indeed urgent and real （Prasanna et al. 2013）. Crop productionmust double by 2050 to meet future production demands （Tilman et al. 2011）. The ability to achieve this increaserepresents a significant challenge to plant breeders. Crop yields must increase at a rate of 2.47o per year, yet the averagerate of increase is only 1.3% with yields stagnating in up to 40% of land under cereal production （Ray et al. 2012, 2013）. Therefore,crops with higher yield potential and more resistant to abiotic stress conditions are needed to address such challenges.
文摘It was identified that there were 4 St chromosomes derived from Th, intermedium in common wheat-Th. intermedium alien additional line TAI-27 by in situ hybridization. Two St chromosomes added to wheat chromosome in TAI-27 as well as two of them replaced two of 42 in wheat chromosomes. This indicates that TAI-27 is not only an alien additional line, but also a replacing line. The additional chromosomes in TAI-27 were microdissected and a microcloning library was constructed. A special probe of Th. intermedium was obtained from a microcloning library. The sequence analysis indicated that there were no homology with Genebank data. This makes it possible to screen genes with the disease-resistance, adversity-tolerance and fine character from Th.intermedium.
