A novel method which makes full use of point groups including Abeian and nonAbelian groups is presented. The key point for this method is the definition of a kind of newsymmetry moecular orbitals (SMOs). Any group ele...A novel method which makes full use of point groups including Abeian and nonAbelian groups is presented. The key point for this method is the definition of a kind of newsymmetry moecular orbitals (SMOs). Any group element in a moecular point group willtransform one SMO to another equlvalent SMO and no mixture among SMCh exists. The unique feature will be kept for one or two - electron integrals as well as the Slater determinantsconstructed using SMCh. Consequently, the character integrals and character detendnants(CDs) can be selected according to some simple rules. Based on this method, a preliminarycharacter single and doubly excited single reference CI (CD - SR - CISD) program is developed, and pilot calculations are performed and compared with GAUSSIAN - 94.For thehigh symmetry point group models and linear molecules our CD - CISD program costs lessCPU - time than G94 - CISD and the storage demand of CD - CISD is also remarkably alleviated.展开更多
[Objective] The research aimed to study the morphological characteristics and karyotype of Pelteobagrus fulvidraco in Dongting Lake water system.[Method] By using the conventional biological morphometry,PHA and colchi...[Objective] The research aimed to study the morphological characteristics and karyotype of Pelteobagrus fulvidraco in Dongting Lake water system.[Method] By using the conventional biological morphometry,PHA and colchicine injection method in vivo,the morphological characteristics and karyotype of P.fulvidraco in Yuanshui River and Lishui River of Dongting Lake were analyzed.[Result] In three ratio traits including standard length/head length,standard length/caudal peduncle depth,head length/snout length,P.fulvidraco of Yuanshui River and Lishui River had significant differences（P0.05）.However,the number and karyotype of their chromosomes were same.The chromosome number was 2n = 52,and the karyotype formula was 20M＋12SM＋10ST＋10T.The number of chromosome arm was 84.[Conclusion] The research result had certain theoretical guidance significance for the protection and utilization of wild P.resource in Dongting Lake water system.展开更多
An experiment was carried out at Mkuranga Research Station of National Coconut Development Programme （NCDP） to study the effect of light regimes on three different crops which are sweet potato, cowpea and pineapple ...An experiment was carried out at Mkuranga Research Station of National Coconut Development Programme （NCDP） to study the effect of light regimes on three different crops which are sweet potato, cowpea and pineapple between 1995 and 1996. Four light intensities with nominal values of light transmission namely L0 = 100%, L 1 = 75%, L2 = 50%, L3 = 25% were provided by nylon netting materials which filtered sunlight to varying light percentages. The experiment was a split-plot on randomized complete block design, replicated four times. Growth measurements and yield were recorded at a regular interval in all crops. Leaf morphological characteristics were carried out only on sweet potato. Result on the leaf morphological characteristics showed light intensity strongly influenced growth and development of sweet potato. Specific leaf area values in full light were smaller than those in under heavy shade. The light intensity increased the cowpea seed yield significantly （P 〈 0.01） and the interaction between seasons （year） x light regimes was significant （P 〈 0.01）. In low intensity, pineapple flowered earlier and yielded more than in high intensity. These results have provided useful information in planning intercropping models in coconut based-farming systems in Tanzania.展开更多
An argentophilic structure is present in the metaphase chromosomes of garlic (Allium sativum). Cytochemical studies indicate that the main component of the structure is non-histone proteins (NHPs). The results of ligh...An argentophilic structure is present in the metaphase chromosomes of garlic (Allium sativum). Cytochemical studies indicate that the main component of the structure is non-histone proteins (NHPs). The results of light and electron microscopic observations reveal that the chromosme NHP scaffold is a network which is composed of fibres and granules and distributed throughout the chromosomes. In the NHP network, there are many condensed regions that are connected by relatively looser regions. The distribution of the condensed regions varies in individual chromosomes. In some of the chromosomes the condensed regions are longitudinally situated in the central part of a chromatid while in others these regions appear as coillike transverse bands. At early metaphase, scaffolds of the sister chromatids of a chromosome are linked to each other in the centromeric region, meanwhile, they are connected by scafold materials along the whole length of the chromosome. At late metaphase, however, the connective scaffold materials between the two sister chromatids disappear gradually and the chromatids begin to separate from one another at their ends, but the Chromatids are linked.together in the centromeric region until anaphase. This connection seems to be related to the special structure of the NHP scaffold formed in the centromeric region. The morphological features and dynamic changes of the chromosome scaffold are discussed.展开更多
To further increase millet yield, the ideal plant in millet has become the goal of high yield breeding for millet. Taking crossbreeding or dynamic breeding technique as dominant and technologies such as modern selecti...To further increase millet yield, the ideal plant in millet has become the goal of high yield breeding for millet. Taking crossbreeding or dynamic breeding technique as dominant and technologies such as modern selection or system selection as subsidiary, progenies with ideal plant are selected by using new germplasms such as Lilvgu and Lizigu with the significant difference in plant type to other cultivars as parents. The ge- netic characteristics of new germplasms in breeding are also emphatically analyzed to summarize the breeding experience of ideal plant, which has been proved that the combination of ideal plant and heterosis utilization is one of the important ways to raise millet yield breakthrough.展开更多
Organisms of delta form unique ecosystem consist of organisms of endemic, ocean and transition waters. Both Porong and Solo Deltas of East Java have a unique morphological characteristic because they were formed by di...Organisms of delta form unique ecosystem consist of organisms of endemic, ocean and transition waters. Both Porong and Solo Deltas of East Java have a unique morphological characteristic because they were formed by different sediments. During the study on foraminifera in the two deltas, agglutinated foraminifera were given special attention since there were so few records on the occurrence of this group from Indonesia. Agglutinated foraminifera characterized by their shell （test） formed materials that consisting of attachment of foreign materials and cemented by CaCO3 and SiO3. This study was conducted on November 2007 and showed the relatively similar result on Porong and Solo Deltas in term of species. But the number of collected specimens is significantly different, which was recorded more than doubled. Of the 15 stations studied in each delta, 19 species were collected from the Porong Delta and 21 species were in all 15 stations of the Solo Delta. The stations which located close to the mouth of the river contain more number of individuals than that away from it, especially Ammobaculites agglutinans and Textularia pseudogramen. Generally, the number of collected agglutinated foraminifera of Porong Delta was more abundant than Solo Delta.展开更多
For a successful selection of citrus plants when mating with cultural forms through the method of distant hybridization it is necessary to choose a promising father component such as： a） a complex hybrid of inchange...For a successful selection of citrus plants when mating with cultural forms through the method of distant hybridization it is necessary to choose a promising father component such as： a） a complex hybrid of inchangensis ＂Caucasus＂ obtained using hybrid citrange of American origin _ C. Kinokuni X C.ichanglemon, which gives an eatable lemon with a chemical composition similar to the normal lemon fruit and without any damage it can resist frost at -16 ℃ temperature and b） spontaneous mutations of trifoliata： #1 and #2 which are distinguished among trifoliata species. Their fruits don＇t contain or contain a small amount of the substances that deteriorate the taste： naringin, porcine and so on. They are characterized by high index of frost resistance. In the experiment when obtaining sexual hybrids of the Washington naval orange the above mentioned components were used and hybrid seedlings were obtained, which are distinguished according to their phenotypic hereditary features. Selected seedlings represent the best initial material for a successful future work.展开更多
To understand the effects of leaf physiological and morphological characteristics on δ13C of alpine trees, we examined leaf δ13C value, LA, SD, LNC, LPC, LKC, Chla+b, LDMC, LMA and Narea in one-year-old needles of P...To understand the effects of leaf physiological and morphological characteristics on δ13C of alpine trees, we examined leaf δ13C value, LA, SD, LNC, LPC, LKC, Chla+b, LDMC, LMA and Narea in one-year-old needles of Picea schrenkiana var. tianschanica at ten points along an altitudinal gradient from 1420 m to 2300 m a.s.l. on the northern slopes of the Tianshan Mountains in northwest China. Our results indicated that all the leaf traits differed significantly among sampling sites along the altitudinal gradient(P<0.001). LA, SD, LPC, LKC increased linearly with increasing elevation, whereas leaf δ13C, LNC, Chla+b, LDMC, LMA and Narea varied non-linearly with changes in altitude. Stepwise multiple regression analyses showed that four controlled physiological and morphological characteristics influenced the variation of δ13C. Among these four controlled factors, LKC was the most profound physiological factor that affected δ13C values, LA was the secondary morphological factor, SD was the third morphological factor, LNC was the last physiological factor. This suggested that leaf δ13C was directly controlled by physiological and morphological adjustments with changing environmental conditions due to the elevation.展开更多
Objective:We studied the clinicopathological and immunohistochemical features of olfactory neuroblastoma(ONB).Methods:The clinic pathological data and immunohistochemical features of 15 cases with ONB were analyzed re...Objective:We studied the clinicopathological and immunohistochemical features of olfactory neuroblastoma(ONB).Methods:The clinic pathological data and immunohistochemical features of 15 cases with ONB were analyzed retrospectively,and the related literatures were reviewed.Results:The tumors were all located in the nasal cavity in 15 cases.According to Kadish's staging system,7 cases were in stage A,5 cases in stage B,and 3 cases in stage C.The morphological features showed small round or ovoid tumor cells divided into pieces or trabeculae by connective tissues which were rich in capillaries.The tumor cells had round or oval nuclei and fine chromatins and lack of cytoplasma.Flexner rosette and Homer-Wright rosette were found in some cases.Acidophilic fibrins were composed of cytoplasmic projection among tumor cells.All cases were positive for NSE,Syn,CgA,1 case was positive for Vimentin,2 cases were positive for S-100,while CKpan,LCA and HMB45 were all negative.Conclusion:ONB is a type of very rare malignant tumors,which could be diagnosed by pathology,and immunohistochemistry is helpful in the diagnosis and differential diagnosis.展开更多
文摘A novel method which makes full use of point groups including Abeian and nonAbelian groups is presented. The key point for this method is the definition of a kind of newsymmetry moecular orbitals (SMOs). Any group element in a moecular point group willtransform one SMO to another equlvalent SMO and no mixture among SMCh exists. The unique feature will be kept for one or two - electron integrals as well as the Slater determinantsconstructed using SMCh. Consequently, the character integrals and character detendnants(CDs) can be selected according to some simple rules. Based on this method, a preliminarycharacter single and doubly excited single reference CI (CD - SR - CISD) program is developed, and pilot calculations are performed and compared with GAUSSIAN - 94.For thehigh symmetry point group models and linear molecules our CD - CISD program costs lessCPU - time than G94 - CISD and the storage demand of CD - CISD is also remarkably alleviated.
基金Supported by National Natural Science Foundation of China(30972260)Science and Technology Innovation Team Plan of Hunan Higher Education(2010)~~
文摘[Objective] The research aimed to study the morphological characteristics and karyotype of Pelteobagrus fulvidraco in Dongting Lake water system.[Method] By using the conventional biological morphometry,PHA and colchicine injection method in vivo,the morphological characteristics and karyotype of P.fulvidraco in Yuanshui River and Lishui River of Dongting Lake were analyzed.[Result] In three ratio traits including standard length/head length,standard length/caudal peduncle depth,head length/snout length,P.fulvidraco of Yuanshui River and Lishui River had significant differences（P0.05）.However,the number and karyotype of their chromosomes were same.The chromosome number was 2n = 52,and the karyotype formula was 20M＋12SM＋10ST＋10T.The number of chromosome arm was 84.[Conclusion] The research result had certain theoretical guidance significance for the protection and utilization of wild P.resource in Dongting Lake water system.
文摘An experiment was carried out at Mkuranga Research Station of National Coconut Development Programme （NCDP） to study the effect of light regimes on three different crops which are sweet potato, cowpea and pineapple between 1995 and 1996. Four light intensities with nominal values of light transmission namely L0 = 100%, L 1 = 75%, L2 = 50%, L3 = 25% were provided by nylon netting materials which filtered sunlight to varying light percentages. The experiment was a split-plot on randomized complete block design, replicated four times. Growth measurements and yield were recorded at a regular interval in all crops. Leaf morphological characteristics were carried out only on sweet potato. Result on the leaf morphological characteristics showed light intensity strongly influenced growth and development of sweet potato. Specific leaf area values in full light were smaller than those in under heavy shade. The light intensity increased the cowpea seed yield significantly （P 〈 0.01） and the interaction between seasons （year） x light regimes was significant （P 〈 0.01）. In low intensity, pineapple flowered earlier and yielded more than in high intensity. These results have provided useful information in planning intercropping models in coconut based-farming systems in Tanzania.
文摘An argentophilic structure is present in the metaphase chromosomes of garlic (Allium sativum). Cytochemical studies indicate that the main component of the structure is non-histone proteins (NHPs). The results of light and electron microscopic observations reveal that the chromosme NHP scaffold is a network which is composed of fibres and granules and distributed throughout the chromosomes. In the NHP network, there are many condensed regions that are connected by relatively looser regions. The distribution of the condensed regions varies in individual chromosomes. In some of the chromosomes the condensed regions are longitudinally situated in the central part of a chromatid while in others these regions appear as coillike transverse bands. At early metaphase, scaffolds of the sister chromatids of a chromosome are linked to each other in the centromeric region, meanwhile, they are connected by scafold materials along the whole length of the chromosome. At late metaphase, however, the connective scaffold materials between the two sister chromatids disappear gradually and the chromatids begin to separate from one another at their ends, but the Chromatids are linked.together in the centromeric region until anaphase. This connection seems to be related to the special structure of the NHP scaffold formed in the centromeric region. The morphological features and dynamic changes of the chromosome scaffold are discussed.
基金Supported by the "Eleventh Five-Year "National Science and Tech-nology Supporting Plan(2006BAD02B02-01-02)National Modern Millet Industry System Fund~~
文摘To further increase millet yield, the ideal plant in millet has become the goal of high yield breeding for millet. Taking crossbreeding or dynamic breeding technique as dominant and technologies such as modern selection or system selection as subsidiary, progenies with ideal plant are selected by using new germplasms such as Lilvgu and Lizigu with the significant difference in plant type to other cultivars as parents. The ge- netic characteristics of new germplasms in breeding are also emphatically analyzed to summarize the breeding experience of ideal plant, which has been proved that the combination of ideal plant and heterosis utilization is one of the important ways to raise millet yield breakthrough.
文摘Organisms of delta form unique ecosystem consist of organisms of endemic, ocean and transition waters. Both Porong and Solo Deltas of East Java have a unique morphological characteristic because they were formed by different sediments. During the study on foraminifera in the two deltas, agglutinated foraminifera were given special attention since there were so few records on the occurrence of this group from Indonesia. Agglutinated foraminifera characterized by their shell （test） formed materials that consisting of attachment of foreign materials and cemented by CaCO3 and SiO3. This study was conducted on November 2007 and showed the relatively similar result on Porong and Solo Deltas in term of species. But the number of collected specimens is significantly different, which was recorded more than doubled. Of the 15 stations studied in each delta, 19 species were collected from the Porong Delta and 21 species were in all 15 stations of the Solo Delta. The stations which located close to the mouth of the river contain more number of individuals than that away from it, especially Ammobaculites agglutinans and Textularia pseudogramen. Generally, the number of collected agglutinated foraminifera of Porong Delta was more abundant than Solo Delta.
文摘For a successful selection of citrus plants when mating with cultural forms through the method of distant hybridization it is necessary to choose a promising father component such as： a） a complex hybrid of inchangensis ＂Caucasus＂ obtained using hybrid citrange of American origin _ C. Kinokuni X C.ichanglemon, which gives an eatable lemon with a chemical composition similar to the normal lemon fruit and without any damage it can resist frost at -16 ℃ temperature and b） spontaneous mutations of trifoliata： #1 and #2 which are distinguished among trifoliata species. Their fruits don＇t contain or contain a small amount of the substances that deteriorate the taste： naringin, porcine and so on. They are characterized by high index of frost resistance. In the experiment when obtaining sexual hybrids of the Washington naval orange the above mentioned components were used and hybrid seedlings were obtained, which are distinguished according to their phenotypic hereditary features. Selected seedlings represent the best initial material for a successful future work.
基金supported by the Major Research Plan of the National Natural Science Foundation of China (Grant No. Y411381001)the National Natural Science Foundation of China (Grant No. 91125025)the Postdoctoral Science Foundation of China (Grant No. 2013M532096)
文摘To understand the effects of leaf physiological and morphological characteristics on δ13C of alpine trees, we examined leaf δ13C value, LA, SD, LNC, LPC, LKC, Chla+b, LDMC, LMA and Narea in one-year-old needles of Picea schrenkiana var. tianschanica at ten points along an altitudinal gradient from 1420 m to 2300 m a.s.l. on the northern slopes of the Tianshan Mountains in northwest China. Our results indicated that all the leaf traits differed significantly among sampling sites along the altitudinal gradient(P<0.001). LA, SD, LPC, LKC increased linearly with increasing elevation, whereas leaf δ13C, LNC, Chla+b, LDMC, LMA and Narea varied non-linearly with changes in altitude. Stepwise multiple regression analyses showed that four controlled physiological and morphological characteristics influenced the variation of δ13C. Among these four controlled factors, LKC was the most profound physiological factor that affected δ13C values, LA was the secondary morphological factor, SD was the third morphological factor, LNC was the last physiological factor. This suggested that leaf δ13C was directly controlled by physiological and morphological adjustments with changing environmental conditions due to the elevation.
文摘Objective:We studied the clinicopathological and immunohistochemical features of olfactory neuroblastoma(ONB).Methods:The clinic pathological data and immunohistochemical features of 15 cases with ONB were analyzed retrospectively,and the related literatures were reviewed.Results:The tumors were all located in the nasal cavity in 15 cases.According to Kadish's staging system,7 cases were in stage A,5 cases in stage B,and 3 cases in stage C.The morphological features showed small round or ovoid tumor cells divided into pieces or trabeculae by connective tissues which were rich in capillaries.The tumor cells had round or oval nuclei and fine chromatins and lack of cytoplasma.Flexner rosette and Homer-Wright rosette were found in some cases.Acidophilic fibrins were composed of cytoplasmic projection among tumor cells.All cases were positive for NSE,Syn,CgA,1 case was positive for Vimentin,2 cases were positive for S-100,while CKpan,LCA and HMB45 were all negative.Conclusion:ONB is a type of very rare malignant tumors,which could be diagnosed by pathology,and immunohistochemistry is helpful in the diagnosis and differential diagnosis.
