scholarly journals Comparative study on alkaline phosphatase activity of main tributaries of Three Gorges Reservoir

2019 ◽  
Vol 31 (4) ◽  
pp. 1012-1022
Author(s):  
YUAN Yijun ◽  
◽  
BI Yonghong ◽  
HU Zhengyu
Keyword(s):  
Alkaline Phosphatase ◽  
Comparative Study ◽  
Phosphatase Activity ◽  
Alkaline Phosphatase Activity ◽  
Three Gorges Reservoir ◽  
Three Gorges

scholarly journals Alkaline Phosphatase Activity in the Rat Uterus1

Development ◽  
1961 ◽  
Vol 9 (4) ◽  
pp. 599-608
Author(s):  
K. V. Prahlad ◽  
C. H. Conaway
Keyword(s):  
Alkaline Phosphatase ◽  
Comparative Study ◽  
Phosphatase Activity ◽  
Alkaline Phosphatase Activity ◽  
Laboratory Rats ◽  
Embryo Number

A Comparative study of the distribution of placental scars from the first and second pregnancies in laboratory rats indicated that the most posterior scar of first pregnancy tends to be nearer to the cervix than the most posterior second pregnancy scar (Momberg & Conaway, 1956). Frazer (1955) in an earlier study observed that more embryos implanted in the caudal half of the uterus of the rat than in the cranial half when the embryo number was four or less. Momberg & Conaway (1956) found this difference to be greater when the embryo number was high. The reasons for such distributions are not known, but these findings suggest that the uterus varies along its length and does not provide a uniform environment for the implanting embryos. It would further appear that analyses of the various regions of the uterus might furnish information about conditions offering favourable and less favourable environments for the implantation of the blastocysts.

scholarly journals Phytoplankton communities determine the spatio-temporal heterogeneity of alkaline phosphatase activity: evidence from a tributary of the Three Gorges Reservoir

2016 ◽  
Author(s):  
Yijun Yuan ◽  
Yonghong Bi ◽  
Zhengyu Hu
Keyword(s):  
Alkaline Phosphatase ◽  
Water Temperature ◽  
Distribution Pattern ◽  
Alkaline Phosphatase Activity ◽  
Three Gorges Reservoir ◽  
Temporal Heterogeneity ◽  
Three Gorges ◽  
The Three Gorges ◽  
Phytoplankton Communities ◽  
Spatio Temporal

Abstract. In order to know the role of phytoplankton communities in the distribution pattern of alkaline phosphatase activity (APA), monthly investigation was conducted in the Xiaojiang River, a tributary of the Three Gorges Reservoir (TGR). Different APA fractions (APAT, APA 3.0 μm), environmental parameters, and phytoplankton communities were screened synchronously. Significant spatio-temporal differences of APA with the highest value in summer and the lowest in winter (P  3.0 μm were significantly higher than APA0.45–3 μm indicated phytoplankton was the main contributor to alkaline phosphatase. Correlation analysis indicated the dominant species and cell density could determine the distribution pattern of APA. Turbidity (Turb), total phosphorus (TP), chemical oxygen demand (COD), water temperature (WT), pH and chlorophyll a (Chl a) were proved to be positively correlated with APA; soluble reactive phosphorus (SRP), conductivity (Cond), transparency (SD) and water level (WL) were negatively correlated with APA. It was concluded that spatio-temporal heterogeneity of APA determined by phytoplankton communities was related to water temperature and hydrodynamics.

Does Algal–Bacterial Phosphorus Partitioning Vary Among Lakes? A Comparative Study of Orthophosphate Uptake and Alkaline Phosphatase Activity in Freshwater

1986 ◽  
Vol 43 (2) ◽  
pp. 311-318 ◽  
Author(s):  
David J. Currie ◽  
Ellen Bentzen ◽  
Jacob Kalff
Keyword(s):  
Alkaline Phosphatase ◽  
Comparative Study ◽  
Phosphatase Activity ◽  
Alkaline Phosphatase Activity ◽  
Size Class ◽  
Phosphorus Partitioning

In order to distinguish the activity of phytoplankton and bacterioplankton in 13 lakes of widely varying trophy, we size-fractionated orthophosphate uptake and alkaline phosphatase activity. In most lakes, orthophosphate uptake was consistently and overwhelmingly associated with the smallest particles. Based upon indicators of algal and bacterial presence in each size class, we inferred that the bacterioplankton are responsible for ≥95% of the orthophosphate uptake in situ, except in lakes that are not phosphorus-deficient. In contrast, a large portion of the alkaline phosphatase activity was free in solution (median 46%), and much of the remainder (median 44%) was apparently associated with algae.

LEUCOCYTE METABOLISM IN PREGNANCY

1960 ◽  
Vol XXXV (IV) ◽  
pp. 575-584 ◽  
Author(s):  
C. Borel ◽  
J. Frei ◽  
A. Vannotti
Keyword(s):  
Alkaline Phosphatase ◽  
Oxygen Consumption ◽  
Pregnant Women ◽  
Phosphatase Activity ◽  
Alkaline Phosphatase Activity ◽  
Lactate Production ◽  
Glucose Consumption ◽  
In Pregnancy

ABSTRACT Enzymatic studies, on leucocytes of pregnant women, show an increase of the alkaline phosphatase activity and a decrease of the glucose consumption and lactate production, as well as of proteolysis. The oxygen consumption, with succinate as substrate, does not vary.

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