scholarly journals Observations on the geographical distribution of toponymic endings in Estonia

2012 ◽  
Vol 3 (1) ◽  
pp. 155-172 ◽  
Author(s):  
Peeter Päll
Keyword(s):  
Geographical Distribution ◽  
Distribution Patterns ◽  
Multiple Origins ◽  
Specific Distribution ◽  
Significant Patterns

The article looks at the geographical distribution of toponymic endings with the aim of discovering significant patterns. The corpus includes ca. 9,000 oikonyms, of which 24% are those that have the analysed endings. Endings are recognized if names have at least 3 syllables or have 2 syllables and the Q3 degree of quantity; in these cases the existence of a toponymic suffix is most likely. In the case of endings that have multiple origins there are seemingly no specific distribution patterns, with the exception of some borrowed endings (e.g. -na or -va). In the case of typical toponymic suffixes -la, -ste and -vere each of these are often concentrated into certain areas based on which the whole are of Estonia might be divided into regions: -vere-region (northern Tartumaa and northern Viljandimaa), -ste-region (Võrumaa, southern Tartumaa, southern Viljandimaa and southern Pärnumaa), -la-region (Virumaa, Järvamaa, Harjumaa) and a mixed region (Läänemaa, northern Pärnumaa). The island of Saaremaa is dominated by -la-endings, Hiiumaa is either a mixed region or a -ste-region

scholarly journals Prevalent Pathogenic Variants of ATP7B in Chinese Patients with Wilson’s Disease: Geographical Distribution and Founder Effect

Genes ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 336
Author(s):  
Guo-Min Yang ◽  
Rou-Min Wang ◽  
Nan Xia ◽  
Zi-Wei Zheng ◽  
Yi Dong ◽  
...  
Keyword(s):  
Geographical Distribution ◽  
Founder Effect ◽  
Wilson’S Disease ◽  
Autosomal Recessive Disorder ◽  
Wilson's Disease ◽  
Chinese Patients ◽  
Mainland Chinese ◽  
Pathogenic Variants ◽  
Specific Distribution ◽  
The Common

Wilson’s disease (WD) is an autosomal recessive disorder caused by ATP7B pathogenic variants. This study aimed to show the geographical distribution and haplotype spectrum of three prevalent pathogenic variants (p.R778L, p.P992L, p.T935M) in mainland Chinese population and clarify whether the founder effect may account for their origins. We firstly summarized the frequency and geographical distribution of p.R778L, p.P992L and p.T935M in 715 WD patients. Then, to construct haplotypes associated with the three variants, Sanger sequencing and microsatellite typing at three dinucleotide-repeat markers (D13S314, D13S301, D13S316) flanking the ATP7B gene were performed in 102 WD families. An obvious regional-specific distribution feature was found in p.T935M. Linkage disequilibrium at the three markers was shown in all the three variants and we found the common haplotypes specific for p.R778L, p.P992L and p.T935M respectively, represented successively by 10-7-7, 10-9-5 and 12-4-8, which all exhibited great significance vs. the control chromosomes (p < 0.01). Meanwhile, haplotypes for the three variants differed from the studies in other regions to some extent. The common haplotypes we found indicate that three prevalent pathogenic variants emerge due to the founder effect. Furthermore, the study contributes to expand our knowledge of the genetic diversity of WD from a cross-regional perspective.

scholarly journals Effect of Copper On Bioconcentration of Benzotriazole Ultraviolet Stabilizers (BUVSs) in Common Carp (Cyprinus Carpio)

2021 ◽  
Author(s):  
Dandan Zhao ◽  
Tadiyose Girma Bekele ◽  
Hongxia Zhao
Keyword(s):  
Common Carp ◽  
Distribution Patterns ◽  
Ecological Effect ◽  
Tissue Specific ◽  
Treatment Groups ◽  
Specific Distribution ◽  
Muscle Tissues ◽  
Effect Of Copper ◽  
Depuration Rate ◽  
Kinetics Of

Abstract Benzotriazole ultraviolet stabilizers (BUVSs) have received increasing attention due to their widespread usage, ubiquitous detection and their adverse ecological effect. However, information about the bioaccumulation potential of BUVSs and their joint exposure with heavy metals remains scarce. In this study, we investigated the bioaccumulation kinetics of 6 frequently reported BUVSs in common carp under different Cu concentration for 48 d, and their tissue-specific distribution patterns (liver, kidney, gill, and muscle tissues) were also evaluated. The bioconcentration factors (BCFs) and half-lives (t1/2) in the tissues ranged from 5.73 (UV-PS) to 1076 (UV-327), and 2.19 (UV-PS) to 31.5 (UV-320) days, respectively. The tissue-specific concentration and BCF values followed the order of liver > kidney > gill > muscle with or without Cu exposure. An increase in BCF with rising Cu concentration was observed, which is caused by the decreased depuration rate (k2) in more than half of treatment groups. These results indicated that BUVSs accumulated in fish and provides important insight into the risk assessment of this group of chemicals.

scholarly journals Multiple origins of insular woodiness on the Canary Islands are consistent with palaeoclimatic aridification

2020 ◽  
Author(s):  
Alexander Hooft van Huysduynen ◽  
Steven Janssens ◽  
Vincent Merckx ◽  
Rutger Vos ◽  
Luis Valente ◽  
...  
Keyword(s):  
Canary Islands ◽  
Canary Island ◽  
Distribution Patterns ◽  
Evolutionary Transition ◽  
North African ◽  
Island Species ◽  
Chloroplast Markers ◽  
Multiple Origins ◽  
The Family ◽  
Family Level

ABSTRACTAimInsular woodiness, referring to the evolutionary transition from herbaceousness towards woodiness on islands, has arisen at least 38 times on the Canary Islands. Distribution patterns and physiological experiments have suggested a link between insular woodiness and increased drought stress resistance in current-day species, but we do not know in which palaeoclimatic conditions these insular woody lineages originated. Therefore, we estimated the timing of colonisation events and origin of woodiness of multiple Canary Island lineages and reviewed the palaeoclimate based on literature.LocationCanary Islands (Spain).Taxon37 lineages, including 24 insular woody and 13 non-insular woody (i.e. herbaceous, ancestrally woody, and derived woody).MethodsTo enable a simultaneous dating analysis for all 37 lineages, two chloroplast markers (matK and rbcL) for 135 Canary Island species and 103 closely related continental relatives were sequenced and aligned to an existing matK-rbcL dataset including ca 24,000 species that was calibrated with 42 fossils from outside the Canaries. After constraining the species to the family level, 200 RAxML runs were performed and dated with TreePL.ResultsWoodiness in 80-90% of the insular woody lineages originated within the last 7 Myr, coinciding with the onset of major aridification events nearby the Canaries (start of north African desertification, followed by Messinian salinity crisis); in ca 55-65% of the insular woody lineages studied, woodiness developed within the last 3.2 Myr during which Mediterranean seasonality (yearly summer droughts) became established on the Canaries, followed by dry Pleistocene glacial fluctuations.Main conclusionsAlthough details of the initial colonisation and settlement of many island plant lineages remain elusive, our results are consistent with palaeodrought as a potential driver for woodiness in most of the insular woody Canary Island lineages studied.

scholarly journals Tracking the Distribution and Burst of Nuclear Mitochondrial DNA Sequences (NUMTs) in Fig Wasp Genomes

Insects ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 680
Author(s):  
Jian-Xia Wang ◽  
Jing Liu ◽  
Yun-Heng Miao ◽  
Da-Wei Huang ◽  
Jin-Hua Xiao
Keyword(s):  
Mitochondrial Dna ◽  
Dna Sequences ◽  
Theoretical Basis ◽  
Nuclear Genome ◽  
Distribution Patterns ◽  
Good Evidence ◽  
Fig Wasp ◽  
Fig Wasps ◽  
Exogenous Dna ◽  
Specific Distribution

Mitochondrial DNA sequences can be transferred into the nuclear genome, giving rise to nuclear mitochondrial DNA sequences (NUMTs). NUMTs have been described in numerous eukaryotes. However, the studies on the distribution of NUMTs and its influencing factors are still inadequate and even controversial. Previous studies have suggested that Hymenoptera may be a group rich in NUMTs, in which we selected 11 species of fig wasps (Chalcidoidea, Hymenoptera) to analyze the distribution and evolution of NUMTs at the genomic level. The results showed that the contents of NUMTs varied greatly in these species, and bursts of NUMTs existed in some species or lineages. Further detailed analyses showed that the large number of NUMTs might be related to the large genomes; NUMTs tended to be inserted into unstable regions of the genomes; and the inserted NUMTs might also be affected by transposable elements (TEs) in the neighbors, leading to fragmentations and duplications, followed by bursts of NUMTs. In summary, our results suggest that a variety of genomic environmental factors can determine the insertion and post-insertion fate of NUMTs, resulting in their species- or lineage-specific distribution patterns, and that studying the evolution of NUMTs can provide good evidence and theoretical basis for exploring the dynamics of exogenous DNA entering into the nuclear genome.

Distribution Patterns of Escherichia coli O157:H7 in Ground Beef Produced by a Laboratory-Scale Grinder†

2002 ◽  
Vol 65 (12) ◽  
pp. 1894-1902 ◽  
Author(s):  
ROLANDO A. FLORES ◽  
MARK L. TAMPLIN
Keyword(s):  
Escherichia Coli ◽  
Ground Beef ◽  
Distribution Patterns ◽  
Small Scale ◽  
Escherichia Coli O157 ◽  
Inoculum Level ◽  
E Coli ◽  
Specific Distribution ◽  
Low Levels ◽  
G Prior

This study determined the distribution patterns of Escherichia coli O157:H7 in ground beef when a contaminated beef trim was introduced into a batch of uncontaminated beef trims prior to grinding in a small-scale laboratory grinder. A beef trim (15.3 ± 2 g) was inoculated with a rifampicin-resistant strain of E. coli O157:H7 (E. coli O157:H7rif) and introduced into a stream of noncontaminated beef (322 ± 33 g) prior to grinding. Seven inoculum levels (6, 5, and 4 total log CFU [high]; and 3, 2, 1, and 0 total log CFU [low]) were studied in triplicate. E. coli O157:H7rif was not detected in 3.1 to 43% of the ground beef inoculated with the high levels or in 3.4 to 96.9% of the ground beef inoculated with the low levels. For all inoculum levels studied, the five ground beef fractions (each 7.8 ± 0.6 g) with the highest pathogen levels accounted for 59 to 100% of the total pathogens detected. For all inoculum levels, there was a linear relationship between the quantity of ground beef containing E. coli O157:H7rif and the inoculum level. The quantity of E. coli O157:H7rif in the beef remaining in the grinder was proportional to the inoculum level and was related to the location in the grinder. Different components of the grinder accumulated E. coli O157:H7rif in different quantities, with the most significant accumulation being in the nut (collar) that attaches the die to the blade. This study determined specific distribution patterns of E. coli O157:H7rif after the grinding of a contaminated beef trim along with uncontaminated trims, and the results indicate that the grinding operation should be regarded as a means of distribution of microbial contamination in risk analyses of ground beef operations.

Neurochemically distinct myenteric neurone populations containing calbindin have specific distribution patterns around the circumference of the gastric corpus

2001 ◽  
Vol 303 (3) ◽  
pp. 319-328 ◽  
Author(s):  
Not Available Not Available ◽  
Not Available Not Available ◽  
Not Available Not Available ◽  
Not Available Not Available
Keyword(s):  
Distribution Patterns ◽  
Specific Distribution ◽  
Gastric Corpus ◽  
Myenteric Neurone

scholarly journals Deformed Wing Virus in Two Widespread Invasive Ants: Geographical Distribution, Prevalence, and Phylogeny

Viruses ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 1309
Author(s):  
Chun-Yi Lin ◽  
Chih-Chi Lee ◽  
Yu-Shin Nai ◽  
Hung-Wei Hsu ◽  
Chow-Yang Lee ◽  
...  
Keyword(s):  
Geographical Distribution ◽  
Honey Bee ◽  
Distribution Patterns ◽  
Transmission Efficiency ◽  
Reservoir Host ◽  
Asia Pacific ◽  
Invasive Ants ◽  
Pollination Services ◽  
Deformed Wing Virus ◽  
Bee Viruses

Spillover of honey bee viruses have posed a significant threat to pollination services, triggering substantial effort in determining the host range of the viruses as an attempt to understand the transmission dynamics. Previous studies have reported infection of honey bee viruses in ants, raising the concern of ants serving as a reservoir host. Most of these studies, however, are restricted to a single, local ant population. We assessed the status (geographical distribution/prevalence/viral replication) and phylogenetic relationships of honey bee viruses in ants across the Asia–Pacific region, using deformed wing virus (DWV) and two widespread invasive ants, Paratrechina longicornis and Anoplolepis gracilipes, as the study system. DWV was detected in both ant species, with differential geographical distribution patterns and prevenance levels between them. These metrics, however, are consistent across the geographical range of the same ant species. Active replication was only evident in P. longicornis. We also showed that ant-associated DWV is genetically similar to that isolated from Asian populations of honey bees, suggesting that local acquisition of DWV by the invasive ants may have been common at least in some of our sampled regions. Transmission efficiency of DWV to local arthropods mediated by ant, however, may vary across ant species.

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