Research progress of B. dorsalis and its species complex in Taiwan region and abroad was summarized from the aspects of classification, origin, transmission, distribution, host, biological characteristics and adaptabi...Research progress of B. dorsalis and its species complex in Taiwan region and abroad was summarized from the aspects of classification, origin, transmission, distribution, host, biological characteristics and adaptability to environmental conditions, in order to provide references and basis for researching B. dorsalis and its species complex in China.展开更多
In order to make a 10 Gbit/s 2:1 half-rate multiplexer operate without external clocks, a 5 Gbit/s clock recovery (CR) circuit is needed to extract the desired clock from one input data. For the CR circuit, a 3-sta...In order to make a 10 Gbit/s 2:1 half-rate multiplexer operate without external clocks, a 5 Gbit/s clock recovery (CR) circuit is needed to extract the desired clock from one input data. For the CR circuit, a 3-stage ring voltage-controlled oscillator (VCO) is employed to avoid an unreliable startup of a 2-stage VCO and a low oscillation frequency of a 4-stage VCO. A phase frequency detector (PFD) is used to expand the pull-in range to meet the wide tuning range of a VCO required by process-voltage-temperature (PVT) variation. SMIC 0. 18-μm CMOS technology is adopted and the core area is 170 μm ×270 μm. Measurements show that, under a 1.8 V supply voltage, it consumes only about 90 mW, and has an input sensitivity of less than 25 mV, an output single-ended swing of above 300 mV, a phase noise of - 114 dBc/Hz at 1 MHz offset and a pull-in range of 1 GHz.展开更多
A 2.5Gb/s clock and data recovery (CDR) circuit is designed and realized in TSMC's standard 0.18/μm CMOS process. The clock recovery is based on a PLL. For phase noise optimization,a dynamic phase and frequency de...A 2.5Gb/s clock and data recovery (CDR) circuit is designed and realized in TSMC's standard 0.18/μm CMOS process. The clock recovery is based on a PLL. For phase noise optimization,a dynamic phase and frequency detector (PFD) is used in the PLL. The rms jitter of the recovered 2.5GHz clock is 2.4ps and the SSB phase noise is - 111dBc/Hz at 10kHz offset. The rms jitter of the recovered 2.5Gb/s data is 3.3ps. The power consumption is 120mW.展开更多
AIM: To determine whether one genotype (A or non-A genotypes of HBV) predominated over the other during the course of HBV infection.METHODS: Four baboons were inoculated with HBV. DNA was extracted from serum obtained...AIM: To determine whether one genotype (A or non-A genotypes of HBV) predominated over the other during the course of HBV infection.METHODS: Four baboons were inoculated with HBV. DNA was extracted from serum obtained at monthly intervals postinoculation for 52 weeks and HBV DNA was amplified using primers specific for the core region containing an insert characteristic of genotype A (nt 2 354-2 359, numbering from the EcoRI site). The amplicons were cloned into PCRScriptTM and a minimum of 15 clones per time point were sequenced in both directions.RESULTS: Both genotypes persisted for the entire followup period of 52 weeks. Genotype non-A predominated in two baboons and genotype A in one baboon. Neither genotype predominated in the fourth baboon, as shown at a 5 % level of testing.CONCLUSION: No conclusions concerning the dominance of either genotype or the natural progression or replication rates of HBV could be drawn because the pattern of the genotypes found may have been caused by sampling fluctuations at the time of DNA extraction and cloning as a result of the very low viral loads in the baboon sera.展开更多
Background Recurrence of takotsubo cardiomyopathy (TTC) is a well-known complication. However, current literature lists only a few isolated cases. We aimed to determine the incidence and clinical significance of rec...Background Recurrence of takotsubo cardiomyopathy (TTC) is a well-known complication. However, current literature lists only a few isolated cases. We aimed to determine the incidence and clinical significance of recurrent TTC. Methods & Results Our institutional database constituted a collective of 114 patients diagnosed with TTC since 2003. Close follow-up of these patients revealed a recurrence of TTC in seven of these (6.1%). The time interval between the index event and its recurrence varied between six months and six years. Arterial hypertension was more revealed in the recurrence group of TTC compared to non-recurrence group, (P = 0.02). Chronic obstructive pulmo- nary disease and/or asthma was more diagnosed in the recurrence group, (P = 0.04). Clinical events like fight ventficular involvement, TTC related complications such as life-threatening arrhythmias, pulmonary congestion and in hospital death were observed more frequently in the recurrent episode. Over a mean follow-up of one year the mortality rate was similar in both groups. Conclusions Recurrence of TTC within six years after index event is not an uncommon phenomenon. In the event of right ventricular involvement in the relapse phase, it might be associated with a higher complication rate. TTC recurrence should be the first differential diagnosis in patients with a past history of TTC.展开更多
The sea cucumber Apostichopus japonicus is a commercially and ecologically important species in China. A total of 3056 potential unigenes were generated after assembling 7597 A. japonicus expressed sequence tags (ESTs...The sea cucumber Apostichopus japonicus is a commercially and ecologically important species in China. A total of 3056 potential unigenes were generated after assembling 7597 A. japonicus expressed sequence tags (ESTs) downloaded from Gen-Bank. Two hundred and fifty microsatellite-containing ESTs (8.18%) and 299 simple sequence repeats (SSRs) were detected. The average density of SSRs was 1 per 7.403 kb of EST after redundancy elimination. Di-nucleotide repeat motifs appeared to be the most abundant type with a percentage of 69.90%. Of the 126 primer pairs designed, 90 amplified the expected products and 43 showed polymorphism in 30 individuals tested. The number of alleles per locus ranged from 2 to 26 with an average of 7.0 alleles, and the observed and expected heterozygosities varied from 0.067 to 1.000 and from 0.066 to 0.959, respectively. These new EST-derived microsatellite markers would provide sufficient polymorphism for population genetic studies and genome mapping of this sea cucumber species.展开更多
The compound KdV-type equation with nonlinear terms of any order is reduced to the integral form. Using the complete discrimination system for polynomial, its all possible exact traveling wave solutions are obtained. ...The compound KdV-type equation with nonlinear terms of any order is reduced to the integral form. Using the complete discrimination system for polynomial, its all possible exact traveling wave solutions are obtained. Among those, a lot of solutions are new.展开更多
SSR(Simple Sequence Repeats), also known as microsatellites or STRs(short tandem repeats), are a type of PCRbased markers. So far, the version of grape genome has been updated constantly, but SSRs derived from protein...SSR(Simple Sequence Repeats), also known as microsatellites or STRs(short tandem repeats), are a type of PCRbased markers. So far, the version of grape genome has been updated constantly, but SSRs derived from protein-coding genes in grape have not yet been identified. In this study, 4 337 SSR-containing genes were found among 29 971 protein-coding genes in grape(Vitis vinifera L.), and 5 384 SSRs were found. There were 96 types of repeat motifs in SSRs derived from protein-coding genes in grape, and the most frequently occurring repeat motif was A/T. Among various repeat motifs in dinucleotide SSRs, the most frequently occurring repeat motif was AG/CT. Moreover, many genes exhibited codon usage bias, which was affected by the mutation pressure. GO annotation, KEGG annotation and domain analysis of these genes were performed.Several genes were found to be closely related to the synthesis and metabolism of secondary metabolites, synthesis of flavones or anthocyanins, development and morphology of plant organs, and tolerance to biotic or abiotic stresses, including transcription factors in MYB, Hsf, NBS and TPC families. This study laid a solid foundation for the development of SSR markers and research of QTLs controlling complex agronomic traits in grape.展开更多
NMR spectroscopy and X-ray crystallography are two premium methods for determining the atomic structures of macro-biomolecular complexes.Each method has unique strengths and weaknesses.While the two techniques are hig...NMR spectroscopy and X-ray crystallography are two premium methods for determining the atomic structures of macro-biomolecular complexes.Each method has unique strengths and weaknesses.While the two techniques are highly complementary,they have generally been used separately to address the structure and functions of biomolecular complexes.In this review,we emphasize that the combination of NMR spectroscopy and X-ray crystallography offers unique power for elucidating the structures of complicated protein assemblies.We demonstrate,using several recent examples from our own laboratory,that the exquisite sensitivity of NMR spectroscopy in detecting the conformational properties of individual atoms in proteins and their complexes,without any prior knowledge of conformation,is highly valuable for obtaining the high quality crystals necessary for structure determination by X-ray crystallography.Thus NMR spectroscopy,in addition to answering many unique structural biology questions that can be addressed specifically by that technique,can be exceedingly powerful in modern structural biology when combined with other techniques including X-ray crystallography and cryo-electron microscopy.展开更多
基金Supported by Key Disciplinary Developing Project of Forest Protection and Zoology from Yunnan Province(Grant No.XKZ200905)Science and Technology Project of Jiangxi Provincial Department of Education(GJJ08471)~~
文摘Research progress of B. dorsalis and its species complex in Taiwan region and abroad was summarized from the aspects of classification, origin, transmission, distribution, host, biological characteristics and adaptability to environmental conditions, in order to provide references and basis for researching B. dorsalis and its species complex in China.
基金The National High Technology Research and Development Program of China (863 Program)(No. 2007AA01Z2a5)the National Natural Science Foundation of China (No. 60806027,61076073)Specialized Research Fund for the Doctoral Program of Higher Education (No.20090092120012)
文摘In order to make a 10 Gbit/s 2:1 half-rate multiplexer operate without external clocks, a 5 Gbit/s clock recovery (CR) circuit is needed to extract the desired clock from one input data. For the CR circuit, a 3-stage ring voltage-controlled oscillator (VCO) is employed to avoid an unreliable startup of a 2-stage VCO and a low oscillation frequency of a 4-stage VCO. A phase frequency detector (PFD) is used to expand the pull-in range to meet the wide tuning range of a VCO required by process-voltage-temperature (PVT) variation. SMIC 0. 18-μm CMOS technology is adopted and the core area is 170 μm ×270 μm. Measurements show that, under a 1.8 V supply voltage, it consumes only about 90 mW, and has an input sensitivity of less than 25 mV, an output single-ended swing of above 300 mV, a phase noise of - 114 dBc/Hz at 1 MHz offset and a pull-in range of 1 GHz.
文摘A 2.5Gb/s clock and data recovery (CDR) circuit is designed and realized in TSMC's standard 0.18/μm CMOS process. The clock recovery is based on a PLL. For phase noise optimization,a dynamic phase and frequency detector (PFD) is used in the PLL. The rms jitter of the recovered 2.5GHz clock is 2.4ps and the SSB phase noise is - 111dBc/Hz at 10kHz offset. The rms jitter of the recovered 2.5Gb/s data is 3.3ps. The power consumption is 120mW.
文摘AIM: To determine whether one genotype (A or non-A genotypes of HBV) predominated over the other during the course of HBV infection.METHODS: Four baboons were inoculated with HBV. DNA was extracted from serum obtained at monthly intervals postinoculation for 52 weeks and HBV DNA was amplified using primers specific for the core region containing an insert characteristic of genotype A (nt 2 354-2 359, numbering from the EcoRI site). The amplicons were cloned into PCRScriptTM and a minimum of 15 clones per time point were sequenced in both directions.RESULTS: Both genotypes persisted for the entire followup period of 52 weeks. Genotype non-A predominated in two baboons and genotype A in one baboon. Neither genotype predominated in the fourth baboon, as shown at a 5 % level of testing.CONCLUSION: No conclusions concerning the dominance of either genotype or the natural progression or replication rates of HBV could be drawn because the pattern of the genotypes found may have been caused by sampling fluctuations at the time of DNA extraction and cloning as a result of the very low viral loads in the baboon sera.
文摘Background Recurrence of takotsubo cardiomyopathy (TTC) is a well-known complication. However, current literature lists only a few isolated cases. We aimed to determine the incidence and clinical significance of recurrent TTC. Methods & Results Our institutional database constituted a collective of 114 patients diagnosed with TTC since 2003. Close follow-up of these patients revealed a recurrence of TTC in seven of these (6.1%). The time interval between the index event and its recurrence varied between six months and six years. Arterial hypertension was more revealed in the recurrence group of TTC compared to non-recurrence group, (P = 0.02). Chronic obstructive pulmo- nary disease and/or asthma was more diagnosed in the recurrence group, (P = 0.04). Clinical events like fight ventficular involvement, TTC related complications such as life-threatening arrhythmias, pulmonary congestion and in hospital death were observed more frequently in the recurrent episode. Over a mean follow-up of one year the mortality rate was similar in both groups. Conclusions Recurrence of TTC within six years after index event is not an uncommon phenomenon. In the event of right ventricular involvement in the relapse phase, it might be associated with a higher complication rate. TTC recurrence should be the first differential diagnosis in patients with a past history of TTC.
基金supported by the grants from the Science and Technology Development Program of Shandong Province (2009GG10005013)Doctoral Program of Ministry of Education of China (20090132110018)
文摘The sea cucumber Apostichopus japonicus is a commercially and ecologically important species in China. A total of 3056 potential unigenes were generated after assembling 7597 A. japonicus expressed sequence tags (ESTs) downloaded from Gen-Bank. Two hundred and fifty microsatellite-containing ESTs (8.18%) and 299 simple sequence repeats (SSRs) were detected. The average density of SSRs was 1 per 7.403 kb of EST after redundancy elimination. Di-nucleotide repeat motifs appeared to be the most abundant type with a percentage of 69.90%. Of the 126 primer pairs designed, 90 amplified the expected products and 43 showed polymorphism in 30 individuals tested. The number of alleles per locus ranged from 2 to 26 with an average of 7.0 alleles, and the observed and expected heterozygosities varied from 0.067 to 1.000 and from 0.066 to 0.959, respectively. These new EST-derived microsatellite markers would provide sufficient polymorphism for population genetic studies and genome mapping of this sea cucumber species.
基金The project supported by Scientific Reseaxch Fund of Education Department of Heilongjiang Province of China under Grant No. 11511008
文摘The compound KdV-type equation with nonlinear terms of any order is reduced to the integral form. Using the complete discrimination system for polynomial, its all possible exact traveling wave solutions are obtained. Among those, a lot of solutions are new.
基金Supported by Major Agricultural Application Technology Innovation Project of Shandong Province"Development of Landmark Wines and Integrated Application of Key Technologies in Shandong Province"Major Agricultural Application Technology Innovation Project of Shandong Province"Research and Application of Precision Control of Maturation and Product Innovation of Featured Brewing Grape"Agricultural Scientific and Technological Innovation Project of Shandong Academy of Agricultural Sciences(CXGC2016D01)
文摘SSR(Simple Sequence Repeats), also known as microsatellites or STRs(short tandem repeats), are a type of PCRbased markers. So far, the version of grape genome has been updated constantly, but SSRs derived from protein-coding genes in grape have not yet been identified. In this study, 4 337 SSR-containing genes were found among 29 971 protein-coding genes in grape(Vitis vinifera L.), and 5 384 SSRs were found. There were 96 types of repeat motifs in SSRs derived from protein-coding genes in grape, and the most frequently occurring repeat motif was A/T. Among various repeat motifs in dinucleotide SSRs, the most frequently occurring repeat motif was AG/CT. Moreover, many genes exhibited codon usage bias, which was affected by the mutation pressure. GO annotation, KEGG annotation and domain analysis of these genes were performed.Several genes were found to be closely related to the synthesis and metabolism of secondary metabolites, synthesis of flavones or anthocyanins, development and morphology of plant organs, and tolerance to biotic or abiotic stresses, including transcription factors in MYB, Hsf, NBS and TPC families. This study laid a solid foundation for the development of SSR markers and research of QTLs controlling complex agronomic traits in grape.
基金supported by grants from the Research Grants Council of Hong Kong to M.Z.supported by the National Major Basic Research Program of China (Grant No. 2011CB910500)+3 种基金the National Natural Science Foundation of China (Grant No. 31070657)the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KSCX2-YW-R-154)The NMR spectrometers used in our studies were funded by donations from the Hong Kong Jockey Club Charity Foundationthe Special Equipment Grant from RGC of Hong Kong (Grant No. SEG_HKUST06)
文摘NMR spectroscopy and X-ray crystallography are two premium methods for determining the atomic structures of macro-biomolecular complexes.Each method has unique strengths and weaknesses.While the two techniques are highly complementary,they have generally been used separately to address the structure and functions of biomolecular complexes.In this review,we emphasize that the combination of NMR spectroscopy and X-ray crystallography offers unique power for elucidating the structures of complicated protein assemblies.We demonstrate,using several recent examples from our own laboratory,that the exquisite sensitivity of NMR spectroscopy in detecting the conformational properties of individual atoms in proteins and their complexes,without any prior knowledge of conformation,is highly valuable for obtaining the high quality crystals necessary for structure determination by X-ray crystallography.Thus NMR spectroscopy,in addition to answering many unique structural biology questions that can be addressed specifically by that technique,can be exceedingly powerful in modern structural biology when combined with other techniques including X-ray crystallography and cryo-electron microscopy.