Population structure

This paper aims to apply the developed ADE to optimize truss structures subjected to frequency constraints. In addition, limitations of the AOA are also discussed, as well as how to overcome them. In each iteration, a randomly generated probability parameter is used to determine whether AOA or DE that would be used to generate new candidate solutions in the population.

16p vifaye 20-09-2024 2 1   Download

An understanding of soil microorganisms as part of soil system and interactions between the diversity of producers and of decomposers, have major consequences on the functioning of agricultural ecosystems. Soil microorganisms control the transformation and mineralization of natural compounds and xenobiotics. The soil micro biota, existing in high density and diversity, rapidly modify the energetic performance and activity rates to changing environmental conditions.

9p nguaconbaynhay6 24-06-2020 20 1   Download

Cycads occur in lowland forests and are threatened by their degradation, fragmentation and over-exploitation. Our results indicate that cycad population sizes were very small (less 100 individuals) with high propagules. These increased mating between closely related individuals growing in clumps. The allozyme data show although all studied cycads maintained high levels of genetic diversity, an average of 0.556 (0.491 in C. hoabinhensis to 0.598 in C. chevalieri ), the degree of inbreeding was high.

10p 12120609 01-06-2020 15 3   Download

Hybridization of species with porous genomes can eventually lead to introgression via repeated backcrossing. The potential for introgression between species is reflected by the extent of segregation distortion in later generation hybrids.

12p vishikamaru2711 29-04-2020 17 1   Download

Rice (Oryza sativa L.) is one of the most important staple food crops of India for more than 2/3rd of its population. Considering the importance regarding the training needs assessment of the respondents, the present study was conducted in Keirao Bitra subdivision of Imphal East District, Manipur. Ten independent variables were selected regarding the socio-personal, psychological and communication characteristics of the respondents. Out of 38 villages in Keirao Bitra sub-division, 4 villages viz.

9p caygaocaolon4 04-04-2020 13 4   Download

Structural and electronic transitions in polyaniline (PANI) matrix due to the presence of nickel-nanoclusters (PANI-Ni) were investigated via UV-Vis spectroscopic measurements. The obtained results indicate that there exist two populous packets of polaron (located at 872 and 973 nm) in both PANI and PANI-Ni.

4p uocvong04 24-09-2015 31 2   Download

Fourier transform infrared (FTIR) studies showed the changes in a relative intensity of stretching vibrations of the PANI and PANI-Ni films, in a band of 1480 and 1590 cm-1 , as well as those in a band of 1200 and 1350 cm-1 , and evidenced the conversion of quinoid form of PANI to bipolaron structure, and finally to the more delocalized polaronic sites during protonation. This also shows that nickel-nanoclusters play a role as a source supplying protons to promote the protonation, giving a change in population of quinoid and aromatic forms of PANI, and increasing a number of NH bond.

6p uocvong02 24-09-2015 71 3   Download

It is clear that Vietnam is still an agricultural country, in which planting and farming play.an important role in the life of Vietnamese people. Although in recent years, there has been.changes in structure of economy such as the fall in the share of agriculture and the rise of.other sectors, agricultural production also provides jobs for about 60% of Vietnamese.population as well as key export commodities. However, Vietnam is not only famous as the.biggest supplier of rice but also popular with many kinds of fisheries produce like.Pangasius fillets, shrimps, cuttlefish, etc.

11p talata_1 22-09-2014 81 9   Download

The cloned guinea-pig Y2 neuropeptide Y (NPY) receptors expressed in Chinese hamster ovary (CHO) cells, as well as the Y2 receptors natively expressed in rat forebrain, are distributed in two populations. A smaller population that is readily accessed by agonist peptides on the surface of intact cells constitutes less than 30% of Y2 receptors detected in particulates after cell homogenization. A much larger fraction of cell surface Y2 sites can be activated by sulfhydryl modifiers.

8p research12 01-06-2013 38 4   Download

The structure of the lipid A and core region of the lipo-polysaccharide (LPS) fromFrancisella tularensis(ATCC 29684) was analysed using NMR, mass spectrometry and chemical methods. The LPS contains a b-GlcN-(1–6)-GlcN lipid A backbone, but has a number of unusual structural features; it apparently has no substituent at O-1 of the reducing end GlcN residue in the lipid part in the major part of the population, no substituents at O-3 and O-4ofb-GlcN, and no substituent at O-4of the Kdo residue.

7p tumor12 22-04-2013 49 3   Download

Structural analysis of the lipopolysaccharide (LPS) from nontypeableHaemophilus influenzaestrain 981 has been achieved using NMRspectroscopy and ESI-MS on O-deacylatedLPSand core oligosaccharide (OS)material as well as by ESI-MS n on permethylated dephosphorylated OS. A heterogeneous glycoform population was identified, resulting from the variable length of the OS branches attached to the glucose residue in the common structural element of H. influenzae LPS, L-a-D-Hepp-(1fi2)-[PEtnfi6]-L-a-D-Hepp-(1fi3)-[b-D-Glcp-(1fi4)]-L-a-D-Hepp-(1fi5)-[PPEtnfi4]-a-Kdop-(2fi6)-Lipid A....

13p fptmusic 16-04-2013 44 2   Download

We used a PCR-based method to determine the genomic DNA sequences encoding phospholipases A2(PLA2s) from the venoms ofVipera aspis aspis(V. a. aspis),Vipera aspis zinnikeri (V. a. zinnikeri), Vipera berus berus(V. b. berus) and a neurotoxicV. a. aspissnake (neurotoxicV. a. aspis) from a population responsible for unusual neurotoxic envenomations in south-east France. We sequenced five groups of genes, each corresponding to a different PLA2.

10p fptmusic 16-04-2013 41 4   Download

The temperature-induced structural transitions of the full length Alzheimer amyloid b-peptide [Ab(1–40) peptide] and fragments of it were studied using CD and 1 H NMR spectroscopy. The full length peptide undergoes an overall transition from a state with a prominent population of left-handed 31 (polyproline II; PII)-helix at 0
C to a random coil state at 60
C, with an averageDH of 6.8 ± 1.4 kJÆmol )1 per residue, obtained by fitting a Zimm–Bragg model to the CD data.

12p fptmusic 11-04-2013 39 2   Download

The moderately thermophilic bacteriumAcidithiobacillus caldus is found in bacterial populations in many bioleaching operations throughout the world. This bac-terium oxidizes elemental sulfur and other reduced inor-ganic sulfur compounds as the sole source of energy. The purpose of this study was to purify and characterize the tetrathionate hydrolase of A. caldus. The enzyme was purified 16.7-fold by one step chromatography using a SP Sepharose column. The purified enzyme resolved into a single band in 10% polyacrylamide gel, both under denaturing and native conditions.

9p dell39 03-04-2013 49 3   Download

Hepatocytes located in the periportal and perivenous zones of the liver lobule show remarkable differences in the levels and activities of various enzymes and other proteins. To analyze global gene expression patterns of periportal and perivenous hepatocytes, enriched populations of the two cell types were isolated by combined collagenase⁄digitonin perfusion from mouse liver and used for microarray analysis.

11p inspiron33 23-03-2013 31 2   Download

The ergodic hypothesis, which assumes the independence of each cell of the ensemble from all the others, is a necessary prerequisite to attach single cell based explanations to the grand averages taken from population data. This was the prevailing view about the interpretation of cellular biology experi-ments that typically are performed on colonies of billions of cells.

9p galaxyss3 19-03-2013 35 2   Download

We have examined the status of the cytochromebc1 complex in mitochon-drial membranes from yeast mutants in which genes for one or more of the cytochromebc1 complex subunits were deleted. When membranes from wild-type yeast were resolved by native gel electrophoresis and analyzed by immunodecoration, the cytochrome bc1 complex was detected as a mixed population of enzymes, consisting of cytochromebc1 dimers, and ternary complexes of cytochromebc1 dimers associated with one and two copies of the cytochrome c oxidase complex....

14p media19 04-03-2013 39 2   Download

Apolipoprotein E is a polymorphic glycoprotein in humans with a molecu-lar mass of 34.5 kDa. It is a component of chylomicron remnants, very low density lipoprotein, low density lipoprotein and high density lipopro-tein, and is primarily responsible for maintaining plasma lipid homeostasis. In addition to these well-documented functions, recent studies in experi-mental mouse models, as well as population studies, show that apolipo-protein E also plays an important role in the development of obesity and insulin resistance. ...

9p viettel02 20-02-2013 49 2   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Effects of winter on genetic structure natural population of Drosophila melanogaster

16p toshiba21 16-11-2011 37 2   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: ençales de Pamassius mnemosyne (L.) (Lepidoptera Papilionidae) isolement et polymorphisme dans des populations « menacées »

12p toshiba21 16-11-2011 36 3   Download