Literary characters possess a genealogy. Indeed, stock characters like the evil genius or super villain boast family trees that readers can trace not only through time--in this case, starting in the late 19th century-...Literary characters possess a genealogy. Indeed, stock characters like the evil genius or super villain boast family trees that readers can trace not only through time--in this case, starting in the late 19th century--but also across borders. This study traces the genealogical roots of the modern super villain by examining, in turn, Ian Fleming's characters Ernst Blofeld and Dr. Julius No, Sax Rohmer's Dr. Fu Manchu, and Guy Boothby's Dr. Antonio Nikola. In "Orientalism", the author contends that the modern super villain is the embodiment of these writers' orientalist fantasies and fears. Finally, in "Mad Science", the argument is made that the evil geniuses of Fleming, Rohmer, and Boothby may very well be the offspring of an earlier stock character, the mad scientist, who trades monomania for megalomania.展开更多
Gene-centromere mapping is an essential prerequisite for understanding the composition and structure of genomes. Half-tetrad analysis is a powerful tool for mapping genes and understanding chromosomal behavior during ...Gene-centromere mapping is an essential prerequisite for understanding the composition and structure of genomes. Half-tetrad analysis is a powerful tool for mapping genes and understanding chromosomal behavior during meiosis. The Japanese scallop(Patinopecten yessoensis), a cold-tolerant species inhabiting the northwestern Pacific coast, is a commercially important marine bivalve in Asian countries. In this study, inheritance of 32 informative microsatellite loci was examined in 70-h D-shaped larvae of three induced meiogynogenetic diploid families of P. yessoensis for centromere mapping using half-tetrad analysis. The ratio of gynogenetic diploids was proven to be 100%, 100% and 96% in the three families, respectively. Inheritance analysis in the control crosses showed that 51 of the 53 genotypic ratios observed were in accordance with Mendelian expectations at the 5% level after Bonferroni correction. Seven of the 32 microsatellite loci showed the existence of null alleles in control crosses. The second division segregation frequency(y) of the microsatellite loci ranged from 0.07 to 0.85 with a mean of 0.38, suggesting the existence of positive interference after a single chiasma formation in some chromosomes in the scallop. Microsatellite-centromere distances ranged from 4 c M to 42 c M under the assumption of complete interference. Information on the positions of centromeres in relation to the microsatellite loci will represent a contribution towards the assembly of genetic maps in the commercially important scallop species.展开更多
Antibiotics used for agricultural purpose has contributed to the increased prevalence of antibiotic-resistant bacteria. The goal of this study was to investigate the prevalence and antimicrobial resistance of ESBL-pro...Antibiotics used for agricultural purpose has contributed to the increased prevalence of antibiotic-resistant bacteria. The goal of this study was to investigate the prevalence and antimicrobial resistance of ESBL-producing E. coli in small-scaled poultry farms and retail chicken. The cultured E. coli isolates were subjected to phenotypic tests, susceptibility tests, and the polymerase chain reaction for detection of blacTX-M, blasHv, and blaTEM genes. From 120 samples each of chicken feces, retail chicken, soil and chicken feed, ESBL-producing E. coli isolates were detected in 75.9%, 63.6%, 39.2%, and 13.3% of the samples, respectively. Minimum inhibitory concentration (MICs) values indicated that ESBL-producing E. coli were resistance to ampicillin (MIC 〉 32 μg/mL), gentamicin (M1C ≥ 16 μg/mL), cefotaxime (MIC 〉 4 μg/mL) and cefhiaxone (MIC 〉 4 gg/mL), respectively. The total resistance for imipenem was also observed at 1.0% (MIC ≥ 4 gg/mL) and none of the isolates were resistant to ceftazidime (MIC 〉 16 μg/mL). ESBL-producing E. coli from chicken feces and retail chicken carried blasHv gene at a rate of 6.8% and 5.7%, respectively and blaCTX-M gene was also revealed at 2.9% in retail chicken. Moreover, ESBL-producing E. coli isolated from soil harbored blasnv and blaCTX-M genes at 5%. None of the feed samples yielded ESBLs genes. Twenty three resistance patterns were observed for multi-resistant ESBL-producing E. coli. This study highlights the prevalence of multi-antimicrobial resistant ESBL-producing E. coli in small-scaledpoultry farms and retail chicken, hence the need to review poultry management practices to minimize the occurrence.展开更多
Spent silk worm pupae ofAntheraea assama were analyzed for its amino acid constituents and compared with the amino acid composition of fiber from A. assama, A. pyrni, and Bombyx mori. Amino acid percent was determined...Spent silk worm pupae ofAntheraea assama were analyzed for its amino acid constituents and compared with the amino acid composition of fiber from A. assama, A. pyrni, and Bombyx mori. Amino acid percent was determined by UV Spectrophotometer at 570 nm. Infra Red spectra recorded the presence of different amino acids in the spent silk worm pupae powder which corroborate with the amino acids present in the fiber of different silk species.展开更多
The interaction mechanism of collector DLZ in the flotation process of chalcopyrite and pyrite was investigated through flotation experiments,zeta potential measurements and infrared spectrum analysis.Flotation test r...The interaction mechanism of collector DLZ in the flotation process of chalcopyrite and pyrite was investigated through flotation experiments,zeta potential measurements and infrared spectrum analysis.Flotation test results indicate that DLZ is the selective collector of chalcopyrite.Especially,the recovery of chalcopyrite is higher than 90% in neutral and weak alkaline systems,while the recovery of pyrite is less than 10%.When using CaO as pH regulator,at pH=7-11,the floatability of pyrite is depressed and the recovery is less than 5%.Zeta potential analysis shows that the zeta potential of chalcopyrite decreases more obviously than that of pyrite after interaction with DLZ,confirming that collector DLZ shows selectivity to chalcopyrite and pyrite.And FTIR results reveal that the flotation selectivity of collector DLZ is due to chemical absorption onto chalcopyrite surface and only physical absorption onto pyrite surface.展开更多
Objective:The aim of the study was to investigate the influence of gastric cancer family history in the gastric cancer (GC) patients. Methods: Gastric cancer family histories within second degree relatives and clinico...Objective:The aim of the study was to investigate the influence of gastric cancer family history in the gastric cancer (GC) patients. Methods: Gastric cancer family histories within second degree relatives and clinicopathological features were obtained for 497 patients. Results:Of the 497 probands,235 probands were incorporated into familial gastric cancer (FGC) group (there were at least two GC members in the family); 262 probands were included in the non-FGC group (relatives only affected with non-GCs). Of 614 tumors in relatives,GC was the most frequent,followed by lung cancer,esophageal cancer,hepatocellular cancer,colorectal cancer,urogenital cancer,breast cancer,and pancreatic cancer. Most affected members aggregated within first-degree relatives. The ratio of males to females in affected first-degree relatives was usually higher in male probands. Paternal history of GC was a strong risk for GC in males,while risk of GC by maternal history of GCs was increased in females. Difference in tumor histological types between the two groups was derived from an excess of diffuse GC in non-FGC male probands. The lower site was the most frequent tumor location in all subgroups. Conclusion:Distribution of associated non-GCs in a family history of GC may vary with geographic areas. GC may have different genetic and/or environmental etiology in different families,and a certain subtype may be inherited in a male-influenced fashion.展开更多
The flotation of diaspore and kaolinite by one of a series of tertiary amines(DRN,DEN,DPN and DBN) was investigated.The tertiary amines show better floating recovery for kaolinite compared to diaspore.The maximum re...The flotation of diaspore and kaolinite by one of a series of tertiary amines(DRN,DEN,DPN and DBN) was investigated.The tertiary amines show better floating recovery for kaolinite compared to diaspore.The maximum recovery D-value is 45%over a pH range from 3 to 8.FT-IR spectra confirm the presence of hydroxyl groups on the surface of kaolinite and diaspore.Zeta potential measurements show that the mineral surfaces are negatively charged over a wide pH range.Ionization of hydroxyl groups mainly accounts for the surface charging mechanism.The adsorption of tertiary amines onto the mineral surface is due mainly to electrostatic effects and the difference in electrostatic effect between a collector and the two minerals can explain the flotation separation.Inductive electronic and steric effects from the substituent groups result in different collecting powers for the four tertiary amines.展开更多
The absorption spectrum of NiI between 445 and 510 nm has been investigated using the technique of laser vaporization/reaction with free jet expansion and cavity ring down laser absorption spectroscopy. Two new transi...The absorption spectrum of NiI between 445 and 510 nm has been investigated using the technique of laser vaporization/reaction with free jet expansion and cavity ring down laser absorption spectroscopy. Two new transitions namely,[21.3]^2△5/2-X^2△5/2 and [21.9]^2Ⅱ3/2-X^2△5/2 systems were identified and studied. Spectra of both ^58NiI and ^60NiI isotopic molecules were observed. Equilibrium molecular constants for both electronic states are reported and the equilibrium bond length for the [21.3]^2△5/2 state and the[21.9]^2Ⅱ3/2 state was respectively determined to be 2.431 and 2.481 A.展开更多
A sensitive and specific high performance liquid chromatography method was established for measuring cefazolin sodium level in rabbit synovial fluid. Acetonitrile was used to precipitate proteins and antipyrine was us...A sensitive and specific high performance liquid chromatography method was established for measuring cefazolin sodium level in rabbit synovial fluid. Acetonitrile was used to precipitate proteins and antipyrine was used as internal standard. Samples were analyzed on a Dionex Ultimate U3000 HPLC system equipped with Phenomenex Luna C18 column (150 mmx4.60 mm, 5 Bm, 100 A). The mobile phase consisted of acetonitrile and 0.1% formic acid in water. The flow rate was 1 mL/min. The detection wavelength was set at 272 nm. The column temperature was maintained at 25 ℃. The calibration curve was linear in the range of 1.0-100.0 μg/mL (r2 = 0.9999). The limit of detection (LOD, S/N - 3) was 0.07 μg/mL. The limit of quantitation (LOD, S/N = 10) was 0.22 pg/mL. The recovery of cefazolin sodium (low, medium and high) was 124.6%, 117.8%, and 100.6% (RSD% - 1.9%, 4.0%, 1.1%, n = 5), respectively. The intra-day and inter-day precision values were in the range of 0.5%-2.7%. The method was simple, sensitive and reliable. It can be used for the quantitative determination of cefazolin sodium in rabbit synovial fluid.展开更多
ATPase 6/8 gene (842 bp) of mitochondrial DNA was sequenced in Labeo rohita samples (n = 253) collected from nine rivers belonging to four river basins; Indus, Ganges, Brahmaputra and Mahanadi. Analysis revealed 4...ATPase 6/8 gene (842 bp) of mitochondrial DNA was sequenced in Labeo rohita samples (n = 253) collected from nine rivers belonging to four river basins; Indus, Ganges, Brahmaputra and Mahanadi. Analysis revealed 44 haplotypes with high haplotype diversity (Hd) 0.694 and low nucleotide diversity (π) 0.001. The within population variation was larger (83.44%) than among population differences (16.56%). The mean Fsv value (0.166; P 〈 0.05) for overall populations revealed moderate level of genetic structuring in the wild L. rohita populations. The haplotype network presented a single clade for wild L. rohita population, from different rivers. Negative values for Fu's index (Fs), mismatch distribution analysis indicated period of expansion in L. rohita population. The time after recent expansion was estimated for each population, between 0.042 to 0.167 mya. The pattern of Isolation by Distance (IBD) was not significant (r = -0.113, P 〈 0.287), when all the sampling locations were compared (Mantel test), however, when an outlier (Indus, Brahmaputra and Mahanadi) was removed from the whole population set, a clear positive correlation between pairwise Fsv and geographic distance (Km) was seen. The analysis of data demonstrated that ATPase6/8 gene polymorphism is a potential marker to understand genetic population structure of wild L. rohita existing in different rivers. The study identified population substructure in wild L. rohita with common ancestral origin [Current Zoology 60 (4): 460--471, 2014].展开更多
In 1981, Cohen constructed an infinite family of homotopy elements ζk∈ π*(S) represented by h0bk ∈ ExtA3,2(p-1)(pk+1+1)(z/p,Z/p) in the Adams spectral sequence, where p 〉 2 and k ≥ 1. In this paper, w...In 1981, Cohen constructed an infinite family of homotopy elements ζk∈ π*(S) represented by h0bk ∈ ExtA3,2(p-1)(pk+1+1)(z/p,Z/p) in the Adams spectral sequence, where p 〉 2 and k ≥ 1. In this paper, we make use of the Adams spectral sequence and the May spectral sequence to prove that the composite map ζn-1β2γs+3 is nontrivial in the stable homotopy groups of spheres πt(s,n)-s-8(S), where p ≥7, n 〉 3, 0≤s 〈p-5 andt(s,n) =2(p-1)[pn+(s+3)p2+(s+4)p+(s+3)]+s.展开更多
We have developed a set of chemometric methods to address two critical issues in quality control of a precious traditional Chinese medicine (TCM), Dong'e Ejiao (DEE J). Based on near infrared (NIR) spectra of m...We have developed a set of chemometric methods to address two critical issues in quality control of a precious traditional Chinese medicine (TCM), Dong'e Ejiao (DEE J). Based on near infrared (NIR) spectra of multiple samples, the genuine manufacturer of DEE J, e.g. Dong'e Ejiao Co., Ltd., was accurately identified among 21 suppliers by the fingerprint method using Hotelling T2, distance to Model X (DModX), and similarity match value (SMV) as dis- criminate criteria. Soft independent modeling of the class analogy algorithm led to a misjudgment ratio of 6.2%, suggesting that the fingerprint method is more suitable for manufacturer identification. For another important feature related to clinical efficacy of DEE J, storage time, the partial least squares-discriminant analysis (PLS-DA) method was applied with a satisfactory misjudgment ratio (15.6%) and individual prediction error around 1 year. Our results demonstrate that NIR spectra comprehensively reflect the essential quality information of DEE J, and with the aid of proper chemometric algorithms, it is able to identify genuine manufacturer and determine accurate storage time. The overall results indicate the promising potential of NIR spectroscopy as an effective quality control tool for DEEJ and other precious TCM products.展开更多
The plant phospholipase D (PLD) plays versatile functions in multiple aspects of plant growth, development, and stress re- sponses. However, until now, our knowledge concerning the PLD gene family members and their ...The plant phospholipase D (PLD) plays versatile functions in multiple aspects of plant growth, development, and stress re- sponses. However, until now, our knowledge concerning the PLD gene family members and their expression patterns in cotton has been limited. In this study, we performed for the first time the genome-wide analysis and expression profiling of PLD gene family in Gossypium arboretum, and finally, a total of 19 non-redundant PLD genes (GaPLDs) were identified. Based on the phylogenetic analysis, they were divided into six well-supported clades (tx, 13/?, 8, ~, ~ and q~). Most of the GaPLD genes with- in the same clade showed the similar exon-intron organization and highly conserved motif structures. Additionally, the chro- mosomal distribution pattern revealed that GaPLD genes were unevenly distributed across 10 of the 13 cotton chromosomes. Segmental duplication is the major contributor to the expansion of GaPLD gene family and estimated to have occurred from 19.61 to 20.44 million years ago when a recent large-scale genome duplication occurred in cotton. Moreover, the expression profiling provides the functional divergence of GaPLD genes in cotton and provides some new light on the molecular mecha- nisms of GaPLDcd and GaPLD62 in fiber development.展开更多
文摘Literary characters possess a genealogy. Indeed, stock characters like the evil genius or super villain boast family trees that readers can trace not only through time--in this case, starting in the late 19th century--but also across borders. This study traces the genealogical roots of the modern super villain by examining, in turn, Ian Fleming's characters Ernst Blofeld and Dr. Julius No, Sax Rohmer's Dr. Fu Manchu, and Guy Boothby's Dr. Antonio Nikola. In "Orientalism", the author contends that the modern super villain is the embodiment of these writers' orientalist fantasies and fears. Finally, in "Mad Science", the argument is made that the evil geniuses of Fleming, Rohmer, and Boothby may very well be the offspring of an earlier stock character, the mad scientist, who trades monomania for megalomania.
基金supported by the grants from National Marine Public Welfare Research Program (201305005)the National Natural Science Foundation of China (31072207)Doctoral Program of Ministry of Education of China (20130132110009)
文摘Gene-centromere mapping is an essential prerequisite for understanding the composition and structure of genomes. Half-tetrad analysis is a powerful tool for mapping genes and understanding chromosomal behavior during meiosis. The Japanese scallop(Patinopecten yessoensis), a cold-tolerant species inhabiting the northwestern Pacific coast, is a commercially important marine bivalve in Asian countries. In this study, inheritance of 32 informative microsatellite loci was examined in 70-h D-shaped larvae of three induced meiogynogenetic diploid families of P. yessoensis for centromere mapping using half-tetrad analysis. The ratio of gynogenetic diploids was proven to be 100%, 100% and 96% in the three families, respectively. Inheritance analysis in the control crosses showed that 51 of the 53 genotypic ratios observed were in accordance with Mendelian expectations at the 5% level after Bonferroni correction. Seven of the 32 microsatellite loci showed the existence of null alleles in control crosses. The second division segregation frequency(y) of the microsatellite loci ranged from 0.07 to 0.85 with a mean of 0.38, suggesting the existence of positive interference after a single chiasma formation in some chromosomes in the scallop. Microsatellite-centromere distances ranged from 4 c M to 42 c M under the assumption of complete interference. Information on the positions of centromeres in relation to the microsatellite loci will represent a contribution towards the assembly of genetic maps in the commercially important scallop species.
文摘Antibiotics used for agricultural purpose has contributed to the increased prevalence of antibiotic-resistant bacteria. The goal of this study was to investigate the prevalence and antimicrobial resistance of ESBL-producing E. coli in small-scaled poultry farms and retail chicken. The cultured E. coli isolates were subjected to phenotypic tests, susceptibility tests, and the polymerase chain reaction for detection of blacTX-M, blasHv, and blaTEM genes. From 120 samples each of chicken feces, retail chicken, soil and chicken feed, ESBL-producing E. coli isolates were detected in 75.9%, 63.6%, 39.2%, and 13.3% of the samples, respectively. Minimum inhibitory concentration (MICs) values indicated that ESBL-producing E. coli were resistance to ampicillin (MIC 〉 32 μg/mL), gentamicin (M1C ≥ 16 μg/mL), cefotaxime (MIC 〉 4 μg/mL) and cefhiaxone (MIC 〉 4 gg/mL), respectively. The total resistance for imipenem was also observed at 1.0% (MIC ≥ 4 gg/mL) and none of the isolates were resistant to ceftazidime (MIC 〉 16 μg/mL). ESBL-producing E. coli from chicken feces and retail chicken carried blasHv gene at a rate of 6.8% and 5.7%, respectively and blaCTX-M gene was also revealed at 2.9% in retail chicken. Moreover, ESBL-producing E. coli isolated from soil harbored blasnv and blaCTX-M genes at 5%. None of the feed samples yielded ESBLs genes. Twenty three resistance patterns were observed for multi-resistant ESBL-producing E. coli. This study highlights the prevalence of multi-antimicrobial resistant ESBL-producing E. coli in small-scaledpoultry farms and retail chicken, hence the need to review poultry management practices to minimize the occurrence.
文摘Spent silk worm pupae ofAntheraea assama were analyzed for its amino acid constituents and compared with the amino acid composition of fiber from A. assama, A. pyrni, and Bombyx mori. Amino acid percent was determined by UV Spectrophotometer at 570 nm. Infra Red spectra recorded the presence of different amino acids in the spent silk worm pupae powder which corroborate with the amino acids present in the fiber of different silk species.
基金Project(50674102) supported by the National Natural Science Foundation of China
文摘The interaction mechanism of collector DLZ in the flotation process of chalcopyrite and pyrite was investigated through flotation experiments,zeta potential measurements and infrared spectrum analysis.Flotation test results indicate that DLZ is the selective collector of chalcopyrite.Especially,the recovery of chalcopyrite is higher than 90% in neutral and weak alkaline systems,while the recovery of pyrite is less than 10%.When using CaO as pH regulator,at pH=7-11,the floatability of pyrite is depressed and the recovery is less than 5%.Zeta potential analysis shows that the zeta potential of chalcopyrite decreases more obviously than that of pyrite after interaction with DLZ,confirming that collector DLZ shows selectivity to chalcopyrite and pyrite.And FTIR results reveal that the flotation selectivity of collector DLZ is due to chemical absorption onto chalcopyrite surface and only physical absorption onto pyrite surface.
基金Supported by two grants from the Science and Technology Program of Shenyang (No.1071166-9-00 and No.1081232-1-00)
文摘Objective:The aim of the study was to investigate the influence of gastric cancer family history in the gastric cancer (GC) patients. Methods: Gastric cancer family histories within second degree relatives and clinicopathological features were obtained for 497 patients. Results:Of the 497 probands,235 probands were incorporated into familial gastric cancer (FGC) group (there were at least two GC members in the family); 262 probands were included in the non-FGC group (relatives only affected with non-GCs). Of 614 tumors in relatives,GC was the most frequent,followed by lung cancer,esophageal cancer,hepatocellular cancer,colorectal cancer,urogenital cancer,breast cancer,and pancreatic cancer. Most affected members aggregated within first-degree relatives. The ratio of males to females in affected first-degree relatives was usually higher in male probands. Paternal history of GC was a strong risk for GC in males,while risk of GC by maternal history of GCs was increased in females. Difference in tumor histological types between the two groups was derived from an excess of diffuse GC in non-FGC male probands. The lower site was the most frequent tumor location in all subgroups. Conclusion:Distribution of associated non-GCs in a family history of GC may vary with geographic areas. GC may have different genetic and/or environmental etiology in different families,and a certain subtype may be inherited in a male-influenced fashion.
基金supported by the National Key Fundamental Research and Development Program(No.2005CB623701)the National Department Public Benefit Research Foundation from Ministry of Land and Resources(No.201011031 )the Foundation for the Author of Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CAGS(No.2935)
文摘The flotation of diaspore and kaolinite by one of a series of tertiary amines(DRN,DEN,DPN and DBN) was investigated.The tertiary amines show better floating recovery for kaolinite compared to diaspore.The maximum recovery D-value is 45%over a pH range from 3 to 8.FT-IR spectra confirm the presence of hydroxyl groups on the surface of kaolinite and diaspore.Zeta potential measurements show that the mineral surfaces are negatively charged over a wide pH range.Ionization of hydroxyl groups mainly accounts for the surface charging mechanism.The adsorption of tertiary amines onto the mineral surface is due mainly to electrostatic effects and the difference in electrostatic effect between a collector and the two minerals can explain the flotation separation.Inductive electronic and steric effects from the substituent groups result in different collecting powers for the four tertiary amines.
文摘The absorption spectrum of NiI between 445 and 510 nm has been investigated using the technique of laser vaporization/reaction with free jet expansion and cavity ring down laser absorption spectroscopy. Two new transitions namely,[21.3]^2△5/2-X^2△5/2 and [21.9]^2Ⅱ3/2-X^2△5/2 systems were identified and studied. Spectra of both ^58NiI and ^60NiI isotopic molecules were observed. Equilibrium molecular constants for both electronic states are reported and the equilibrium bond length for the [21.3]^2△5/2 state and the[21.9]^2Ⅱ3/2 state was respectively determined to be 2.431 and 2.481 A.
基金National Natural Science Foundation(Grant No.81373372)Specialized Research Fund for the Doctoral Program of Higher Education of China(Grant No.20110001110021 and 20130001110059)
文摘A sensitive and specific high performance liquid chromatography method was established for measuring cefazolin sodium level in rabbit synovial fluid. Acetonitrile was used to precipitate proteins and antipyrine was used as internal standard. Samples were analyzed on a Dionex Ultimate U3000 HPLC system equipped with Phenomenex Luna C18 column (150 mmx4.60 mm, 5 Bm, 100 A). The mobile phase consisted of acetonitrile and 0.1% formic acid in water. The flow rate was 1 mL/min. The detection wavelength was set at 272 nm. The column temperature was maintained at 25 ℃. The calibration curve was linear in the range of 1.0-100.0 μg/mL (r2 = 0.9999). The limit of detection (LOD, S/N - 3) was 0.07 μg/mL. The limit of quantitation (LOD, S/N = 10) was 0.22 pg/mL. The recovery of cefazolin sodium (low, medium and high) was 124.6%, 117.8%, and 100.6% (RSD% - 1.9%, 4.0%, 1.1%, n = 5), respectively. The intra-day and inter-day precision values were in the range of 0.5%-2.7%. The method was simple, sensitive and reliable. It can be used for the quantitative determination of cefazolin sodium in rabbit synovial fluid.
文摘ATPase 6/8 gene (842 bp) of mitochondrial DNA was sequenced in Labeo rohita samples (n = 253) collected from nine rivers belonging to four river basins; Indus, Ganges, Brahmaputra and Mahanadi. Analysis revealed 44 haplotypes with high haplotype diversity (Hd) 0.694 and low nucleotide diversity (π) 0.001. The within population variation was larger (83.44%) than among population differences (16.56%). The mean Fsv value (0.166; P 〈 0.05) for overall populations revealed moderate level of genetic structuring in the wild L. rohita populations. The haplotype network presented a single clade for wild L. rohita population, from different rivers. Negative values for Fu's index (Fs), mismatch distribution analysis indicated period of expansion in L. rohita population. The time after recent expansion was estimated for each population, between 0.042 to 0.167 mya. The pattern of Isolation by Distance (IBD) was not significant (r = -0.113, P 〈 0.287), when all the sampling locations were compared (Mantel test), however, when an outlier (Indus, Brahmaputra and Mahanadi) was removed from the whole population set, a clear positive correlation between pairwise Fsv and geographic distance (Km) was seen. The analysis of data demonstrated that ATPase6/8 gene polymorphism is a potential marker to understand genetic population structure of wild L. rohita existing in different rivers. The study identified population substructure in wild L. rohita with common ancestral origin [Current Zoology 60 (4): 460--471, 2014].
基金supported by National Natural Science Foundation of China(Grant Nos.11071125,11261062 and 11171161)Specialized Research Fund for the Doctoral Program of Higher Education(Grant No.20120031110025)the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry(Grant No.2012940)
文摘In 1981, Cohen constructed an infinite family of homotopy elements ζk∈ π*(S) represented by h0bk ∈ ExtA3,2(p-1)(pk+1+1)(z/p,Z/p) in the Adams spectral sequence, where p 〉 2 and k ≥ 1. In this paper, we make use of the Adams spectral sequence and the May spectral sequence to prove that the composite map ζn-1β2γs+3 is nontrivial in the stable homotopy groups of spheres πt(s,n)-s-8(S), where p ≥7, n 〉 3, 0≤s 〈p-5 andt(s,n) =2(p-1)[pn+(s+3)p2+(s+4)p+(s+3)]+s.
基金Project supported by the National Science and Technology Major Project(No.2011ZX09201-201-10),China
文摘We have developed a set of chemometric methods to address two critical issues in quality control of a precious traditional Chinese medicine (TCM), Dong'e Ejiao (DEE J). Based on near infrared (NIR) spectra of multiple samples, the genuine manufacturer of DEE J, e.g. Dong'e Ejiao Co., Ltd., was accurately identified among 21 suppliers by the fingerprint method using Hotelling T2, distance to Model X (DModX), and similarity match value (SMV) as dis- criminate criteria. Soft independent modeling of the class analogy algorithm led to a misjudgment ratio of 6.2%, suggesting that the fingerprint method is more suitable for manufacturer identification. For another important feature related to clinical efficacy of DEE J, storage time, the partial least squares-discriminant analysis (PLS-DA) method was applied with a satisfactory misjudgment ratio (15.6%) and individual prediction error around 1 year. Our results demonstrate that NIR spectra comprehensively reflect the essential quality information of DEE J, and with the aid of proper chemometric algorithms, it is able to identify genuine manufacturer and determine accurate storage time. The overall results indicate the promising potential of NIR spectroscopy as an effective quality control tool for DEEJ and other precious TCM products.
基金the State Key Basic Research and Development Plan (2010CB126003)the National Transgenic Animals and Plants Research Project (2011ZX08005-003, 2011ZX08009-003)
文摘The plant phospholipase D (PLD) plays versatile functions in multiple aspects of plant growth, development, and stress re- sponses. However, until now, our knowledge concerning the PLD gene family members and their expression patterns in cotton has been limited. In this study, we performed for the first time the genome-wide analysis and expression profiling of PLD gene family in Gossypium arboretum, and finally, a total of 19 non-redundant PLD genes (GaPLDs) were identified. Based on the phylogenetic analysis, they were divided into six well-supported clades (tx, 13/?, 8, ~, ~ and q~). Most of the GaPLD genes with- in the same clade showed the similar exon-intron organization and highly conserved motif structures. Additionally, the chro- mosomal distribution pattern revealed that GaPLD genes were unevenly distributed across 10 of the 13 cotton chromosomes. Segmental duplication is the major contributor to the expansion of GaPLD gene family and estimated to have occurred from 19.61 to 20.44 million years ago when a recent large-scale genome duplication occurred in cotton. Moreover, the expression profiling provides the functional divergence of GaPLD genes in cotton and provides some new light on the molecular mecha- nisms of GaPLDcd and GaPLD62 in fiber development.