Postnatal differentiation of sex-specific distribution patterns of G6Pase, G6PDH and ME in the rat liver

1982 ◽  
Vol 75 (1) ◽  
pp. 31-42 ◽  
Author(s):  
D. Sasse ◽  
H. Hoffmann
Keyword(s):  
Rat Liver ◽  
Distribution Patterns ◽  
Specific Distribution ◽  
Postnatal Differentiation

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 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 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 In Situ Measurement of Glutamate Concentrations in the Periportal, Intermediate, and Pericentral Zones of Rat Liver

1997 ◽  
Vol 45 (9) ◽  
pp. 1217-1229 ◽  
Author(s):  
Willie J.C. Geerts ◽  
Ard Jonker ◽  
Louis Boon ◽  
Alfred J. Meijer ◽  
Rob Charles ◽  
...  
Keyword(s):  
Rat Liver ◽  
Correlation Coefficients ◽  
Distribution Patterns ◽  
Male Rat ◽  
Linear Relationships ◽  
Adult Male Rat ◽  
Colorimetric Visualization ◽  
Rat Livers ◽  
Cryostat Sections

We developed a quantitative histochemical assay for measurement of local glutamate concentrations in cryostat sections of rat liver. Deamination of glutamate by glutamate dehydrogenase (GDH) was coupled to the production of formazan and formazan precipitation was used for colorimetric visualization. The method was tested and validated with gelatin model sections with known glutamate concentrations. Calibration graphs showed linear relationships with high correlation coefficients (>96%) between glutamate concentrations or section thickness and absorbance values. The method was reproducible, with a constant percentage of 60 ± 5% of glutamate being converted in gelatin model sections containing glutamate concentrations of 2 mM and higher. Glutamate concentrations were estimated in periportal, intermediate, and pericentral zones of liver lobules that contain low, intermediate, and high GDH activity, respectively. In fed adult male rat livers, periportal zones contained the highest concentrations of glutamate (∼14 mM) and intermediate and pericentral zones ∼13 and 9 mM, respectively. On starvation, glutamate concentrations increased only in the small rim of pericentral cells that express glutamine synthetae, to ∼15 mM. In livers of fetal and newborn rats, glutamate was homogeneously distributed, with a concentration of ∼5 mM. In suckling rat liver, distribution of glutamate was still homogeneous but the concentration was increased to ∼8 mM. These glutamate distribution patterns were in agreement with those detected immunohistochemically.

scholarly journals Different Distribution Patterns of the Two Mannose 6-phosphate Receptors in Rat Liver

2001 ◽  
Vol 49 (11) ◽  
pp. 1397-1405 ◽  
Author(s):  
Satoshi Waguri ◽  
Mari Kohmura ◽  
Shiro Kanamori ◽  
Tsuyoshi Watanabe ◽  
Yoshiyuki Ohsawa ◽  
...  
Keyword(s):  
Rat Liver ◽  
Distribution Patterns ◽  
Mannose 6 Phosphate

scholarly journals Tissue fractionation studies. 6. Intracellular distribution patterns of enzymes in rat-liver tissue*

1955 ◽  
Vol 60 (4) ◽  
pp. 604-617 ◽  
Author(s):  
C. de Duve ◽  
B. C. Pressman ◽  
R. Gianetto ◽  
R. Wattiaux ◽  
F. Appelmans
Keyword(s):  
Rat Liver ◽  
Liver Tissue ◽  
Distribution Patterns ◽  
Intracellular Distribution ◽  
Tissue Fractionation
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