scholarly journals The rules of temporal and spatial migration of Cd content

2021 ◽  
Vol 252 ◽  
pp. 03040
Author(s):  
Dongfang Yang ◽  
Hexin Jiang ◽  
Longlei Zhang ◽  
Qi Wang ◽  
Haixia Li
Keyword(s):  
Jiaozhou Bay ◽  
Regional Distribution ◽  
Horizontal Distribution ◽  
Seasonal Distribution ◽  
Spatial And Temporal Variation ◽  
Source Water ◽  
Temporal And Spatial ◽  
And Migration ◽  
Source Water Quality ◽  
Variation Process

According to the survey dataset on the waters of Jiaozhou Bay from 1984 to 1988, this paper discusses the data of Cd content each year. From the perspectives of content size, horizontal distribution, vertical distribution, seasonal distribution, regional distribution, structural distribution and tendency distribution, it studies the source, water quality, distribution and migration conditions of Cd content in the waters of Jiaozhou Bay. On the scale of space, 21 migration rules have been gotten during the spatial and temporal variation process of Cd content in the waters of Jiaozhou Bay.

scholarly journals The spatiotemporal migration process of Cd content and the theory developed

2021 ◽  
Vol 257 ◽  
pp. 03077
Author(s):  
Dongfang Yang ◽  
Ziyuan Zeng ◽  
Longlei Zhang ◽  
Qi Wang ◽  
Haixia Li
Keyword(s):  
Water Body ◽  
Jiaozhou Bay ◽  
Regional Distribution ◽  
Horizontal Distribution ◽  
Seasonal Distribution ◽  
Migration Process ◽  
Material Migration ◽  
Other Substances ◽  
And Migration ◽  
Migration Theories

According to the survey data of Jiaozhou Bay water body from 1984 to 1988, this paper analyzed and explored the data of Cd content each year, and studied the sources, water quality, distribution and migration conditions of Cd content in the waters of Jiaozhou Bay from the perspectives of volume, horizontal distribution, vertical distribution, seasonal distribution, regional distribution, structural distribution and tendency distribution. On the time scale, there are five migration processes of Cd content in the waters of Jiaozhou Bay. The author proposed five material migration theories to present the dynamic migration process of material in the water body. These rules, processes and theories not only provide solid theoretical bases for the migration of Cd content in the waters, but also provide enlightenment for the study of the migration of other substances in water bodies.

scholarly journals Analysis of the Temporal and Spatial Characteristics of Material Cultural Heritage Driven by Big Data—Take Museum Relics as an Example

Information ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 153
Author(s):  
Penglong Li ◽  
Zuoqin Shi ◽  
Yi Ding ◽  
Ling Zhao ◽  
Zezhong Ma ◽  
...  
Keyword(s):  
Cultural Heritage ◽  
Life Cycles ◽  
Cultural Communication ◽  
Temporal And Spatial Distribution ◽  
State Administration ◽  
Cultural Relic ◽  
Temporal And Spatial ◽  
Temporal And Spatial Characteristics ◽  
And Migration ◽  
Cultural Relics

Museum cultural relics represent a special material cultural heritage, and modern interpretations of them are needed in current society. Based on the catalogue data of cultural relics published by the State Administration of Cultural Heritage, this paper analyzes the continuity and intermittentness of cultural relics in time series by using the method of continuity judgment of cultural relics, analyzes the aggregation and migration of cultural relics in space by using the method of spatial analysis, and then uses cosine similarity to explain the similarity distribution in space and time. The results show that the overall distribution of cultural relics exhibits the characteristics of class aggregation, dynasty aggregation and regional aggregation. From the perspective of a time scale, cultural relics have different “life cycles”, displaying continuity, intermittentness, and similarity. From the perspective of a spatial scale, the cultural relic distribution forms a small “cultural communication circle”, showing aggregation, migration, and similarity. The temporal and spatial distribution of cultural relics exhibited more similar characteristics among dynasties that were closer together than those that were far away.

Implications of temporal and spatial scale for Atlantic salmon (Salmo salar) research

1998 ◽  
Vol 55 (S1) ◽  
pp. 9-21 ◽  
Author(s):  
Carol L Folt ◽  
Keith H Nislow ◽  
Mary E Power
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Multiple Scales ◽  
Spatial Scales ◽  
Effective Means ◽  
Research Strategies ◽  
Atlantic Salmon Salmo Salar ◽  
Temporal And Spatial ◽  
And Migration ◽  
Dependent Processes

The Atlantic salmon (Salmo salar) is a model species for studying scale issues (i.e., the extent, duration, and resolution of a study or natural process) in ecology. Major shifts in behavior and habitat use over ontogeny, along with a relatively long life span and large dispersal and migration distances, make scale issues critical for effective conservation, management, and restoration of this species. The scale over which a process occurs must be linked to the research design and we illustrate this with a discussion of resource tracking by Atlantic salmon. Identifying scale inconsistencies (e.g., when a process is evident at one scale but not another) is shown to be an effective means by which some scale-dependent processes are understood. We review the literature to assess the temporal and spatial scales used in Atlantic salmon research and find most current studies appear to sacrifice spatial and temporal extent for increased resolution. Finally, we discuss research strategies for expanding the temporal and spatial scales in salmon research, such as conducting multiple scales studies to elucidate scale inconsistencies, identifying mechanisms, and using techniques and approaches to generalize across studies and over time and space.

Temporal and spatial expression of adrenomedullin and its receptors in the porcine uterus and peri-implantation conceptuses

2021 ◽  
Author(s):  
Sudikshya Paudel ◽  
Bangmin Liu ◽  
Magdalina J Cummings ◽  
Kelsey E Quinn ◽  
Fuller W Bazer ◽  
...  
Keyword(s):  
Peptide Hormone ◽  
Uterine Receptivity ◽  
Mechanistic Target Of Rapamycin ◽  
Evolutionarily Conserved ◽  
Uterine Fluid ◽  
Temporal And Spatial ◽  
Functional Peptide ◽  
And Migration ◽  
Implantation Period ◽  
Proliferation And Migration

Abstract Adrenomedullin (ADM) is an evolutionarily conserved multi-functional peptide hormone that regulates implantation, embryo spacing and placentation in humans and rodents. However, the potential roles of ADM in implantation and placentation in pigs, as a litter-bearing species, are not known. This study determined abundances of ADM in uterine luminal fluid, and the patterns of expression of ADM and its receptor components (CALCRL, RAMP2, RAMP3, and ACKR3) in uteri from cyclic and pregnant gilts, as well as conceptuses (embryonic/fetus and its extra-embryonic membranes) during the peri-implantation period of pregnancy. Total recoverable ADM was greater in the uterine fluid of pregnant compared with cyclic gilts between Days 10 and 16 post-estrus, and was from uterine luminal epithelial (LE) and conceptus trophectoderm (Tr) cells. Uterine expression of CALCRL, RAMP2, and ACKR3 were affected by day (P < 0.05), pregnant status (P < 0.01) and/or day x status (P < 0.05). Within porcine conceptuses, expression of CALCRL, RAMP2 and ACKR3 increased between Days 10 and 16 of pregnancy. Using an established porcine trophectoderm (pTr1) cell line, it was determined that 10−7 M ADM stimulated proliferation of pTr1 cells (P < 0.05) at 48 h, and increased phosphorylated mechanistic target of rapamycin (p-MTOR) and 4E binding protein 1 (p-4EBP1) by 6.1- and 4.9-fold (P < 0.0001), respectively. These novel results indicate a significant role for ADM in uterine receptivity for implantation and conceptus growth and development in pigs. They also provide a framework for future studies of ADM signaling to affect proliferation and migration of Tr cells, spacing of blastocysts, implantation and placentation in pigs.

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