scholarly journals Los isótopos estables del hidrógeno y el oxígeno en los estudios ecofisiológicos de plantas

2017 ◽  
pp. 19
Author(s):  
Casandra Reyes-García ◽  
José Luis Andrade
Keyword(s):  
Stable Isotopes ◽  
Environmental Indicators ◽  
Isotopic Enrichment ◽  
Relevant Research ◽  
Oxygen Stable Isotopes ◽  
Leaf Level ◽  
Isotope Studies ◽  
Plant Water Sources ◽  
The Relationship ◽  
Biological Organisms

Stable isotope studies of elements in biological organisms have become a useful tool to assess the exchange of molecules in the biosphere. Since water is one of the most abundant molecules in such an exchange, studies on stable isotopes of hydrogen and oxygen have become a fundamental component of many plant ecophysiological studies, from the leaf level to the reconstruction of past climates. In this review, we mention the most common methodologies, general notation and the most relevant research on hydrogen and oxygen stable isotopes. Also, we discuss studies on plant water sources, leaf isotopic enrichment due to transpiration, the relationship between environment and oxygen stable isotopes in organic matter, and present studies that propose some plant species as environmental indicators in a globally changing world.

scholarly journals Oxygen stable isotopes variation in water precipitation in Poland – anthropological applications

2017 ◽  
Vol 80 (1) ◽  
pp. 57-70 ◽  
Author(s):  
Aleksandra Lisowska-Gaczorek ◽  
Beata Cienkosz-Stepańczak ◽  
Krzysztof Szostek
Keyword(s):  
Stable Isotopes ◽  
Oxygen Isotope ◽  
Isotope Composition ◽  
Isotope Analysis ◽  
Oxygen Isotope Ratios ◽  
Oxygen Stable Isotopes ◽  
Environmental Background ◽  
Precipitation Water ◽  
Place Of Origin ◽  
Isotope Studies

Abstract The main objective of oxygen isotope analysis is to determine the probable place of origin of an individual or the reconstruction of migration paths. The research are methodologically based on referencing oxygen isotope ratios of apatite phosphates (δ18Op) to the range of environmental background δ18O, most frequently determined on the basis of precipitation. The present work is a response to the need for providing background for oxygen isotope studies on skeletons excavated in Poland. Currently there no monitoring of the isotope composition of precipitation water in Poland is conducted. For this reason, based on the data generated in the Online Isotopes In Precipitation Calculator (OIPC), a database was developed, containing δ18O levels in precipitation for locations in which exploration work was carried out in the archaeological fields from Poland. In total, 279 locations were analysed. The result of the data analysis was a complete isotope composition map for Poland with four zones distinguished by δ18Ow values. The observable differences in oxygen isotope composition of precipitation in Poland are sufficient to trace migrations of individuals and populations, although accurate only at the level of macroregions.

LBA-ECO CD-02 CARBON, NITROGEN, OXYGEN STABLE ISOTOPES IN ORGANIC MATERIAL, BRAZIL

2010 ◽  
Author(s):  
J. BERRY, ◽  
C. COOK, ◽  
T.F. DOMINGUES, ◽  
J. EHLERINGER, ◽  
L. FLANAGAN, ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Organic Material ◽  
Oxygen Stable Isotopes

scholarly journals Supporting Caregivers of Older Adults Through Education in Mindful Gratitude Practice

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 16-16
Author(s):  
Sungsim Lee
Keyword(s):  
Older Adults ◽  
Negative Impact ◽  
Well Being ◽  
Positive Influence ◽  
Mindfulness Practice ◽  
Practice Research ◽  
Relevant Research ◽  
Won Buddhism ◽  
The Relationship

Abstract This presentation describes a supportive mindfulness practice for caregivers of older adults based on the principles of Won Buddhism (an integrative, a modernized Buddhism). As the aging population grows, there is a significant increase in recognition of the negative impact of caregiver stress on older adults’ quality of life. The ability for caregivers to deal compassionately with stress is essential, as caring for older adults can awaken feelings about one’s own vulnerability and mortality. The ‘Mindful Gratitude Practice’ offers a way to cope with stress, cultivate self-care, and improve the care of others. Relevant research will be summarized, which shows mindfulness and gratitude practice respectively benefit positive influence in both physical and emotional well-being. Mindful Gratitude Practice as a spiritual approach that fosters caregivers' emotional stability, reduces their stress and improves the relationship between older adults and their caregivers. In this presentation, three processes of Mindful Gratitude Practice will be described: 1. Understanding a mindfulness practice by establishing intention, attention, and attitude, 2. Learning the principles of a gratitude practice and implementation, and 3. Incorporating mindfulness into a gratitude practice. Research results have demonstrated that through this learning process, caregivers have acquired the concept of interconnectedness, experience grateful moments, and a deep feeling of appreciation in their caregiving relationships. The presenter will guide participants in a short experience of Mindfulness Gratitude Practice. Further readings and resources will be provided for those who are interested.

scholarly journals Different climate sensitivity for radial growth, but uniform for tree-ring stable isotopes along an aridity gradient in Polylepis tarapacana, the world’s highest elevation tree-species

2021 ◽  
Author(s):  
Milagros Rodriguez-Caton ◽  
Laia Andreu-Hayles ◽  
Mariano S Morales ◽  
Valérie Daux ◽  
Duncan A Christie ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Carbon Source ◽  
Tree Ring ◽  
Tree Growth ◽  
Carbon Sink ◽  
Growing Season ◽  
Wood Formation ◽  
Aridity Gradient ◽  
Leaf Level ◽  
Δ13c And Δ18o

Abstract Tree growth is generally considered to be temperature-limited at upper elevation treelines. Yet, climate factors controlling tree growth at semiarid treelines are poorly understood. We explored the influence of climate on stem growth and stable isotopes for Polyepis tarapacana, the world’s highest elevation tree-species found only in the South American Altiplano. We developed tree-ring width index (RWI), oxygen (δ18O) and carbon (δ13C) chronologies for the last 60 years at four P. tarapacana stands located above 4,400 meters in elevation, along a 500-km latitude-aridity gradient. Total annual precipitation decreased from 300 to 200 mm from the northern to the southern sites. We used RWI as a proxy of wood formation (carbon sink) and isotopic tree-ring signatures as proxies of leaf-level gas exchange processes (carbon source). We found distinct climatic conditions regulating carbon-sink processes along the gradient. Current-growing season temperature regulated RWI at wetter-northern sites, while prior-growing season precipitation determined RWI at arid-southern sites. This suggests that the relative importance of temperature to precipitation in regulating tree growth is driven by site-water availability. In contrast, warm and dry growing-seasons resulted in enriched tree-ring δ13C and δ18O at all study sites, suggesting that similar climate conditions control carbon-source processes. Site-level δ13C and δ18O chronologies were significantly and positively related at all sites, with the strongest relationships among the southern-drier stands. This indicates an overall regulation of intercellular carbon dioxide via stomatal conductance for the entire P. tarapacana network, with greater stomatal control when aridity increases. The manuscript also highlights a coupling and decoupling of physiological processes at leaf level versus wood formation depending on their respectively uniform and distinct sensitivity to climate. This study contributes to better understand and predict the response of high-elevation Polylepis woodlands to rapid climate changes and projected drying in the Altiplano.

中國大陸內幕交易法介紹與刑事處罰實證研究：1997－2019

2021 ◽  
Vol 22 (22) ◽  
pp. 103-185
Author(s):  
林建中 林建中 ◽  
李揚 李揚
Keyword(s):  
Empirical Study ◽  
Insider Trading ◽  
Empirical Investigation ◽  
Criminal Cases ◽  
Relevant Research ◽  
Securities Law ◽  
Comprehensive Picture ◽  
The Law ◽  
The Relationship

內幕交易罪的處理，在證券法的發展歷史中，一直具有理論與實務上之重要意義。此一問題，在中國大陸相對初生但生猛且量體巨大的市場環境中如何被面對，從理論與比較法觀點，均具備特殊的研究價值。立法層面上，中國大陸法對於內幕交易的實體法構成，經二十多年的持續發展，已呈現出一定的複雜與完整面貌。然就執行層面視之，法院對於條文的理解與具體適用仍存在諸多爭議之處，同時，相關實證統計等資料的缺乏，也成為執行層面上對內幕交易罪研究的主要障礙之一。基於上述認識，本文立足於內幕交易刑事處罰執行層面的觀察，試圖呈現相關法律設計在中國大陸的司法實踐現狀。並通過1997年立法以來法院判決的實證研究，本文除一般性地檢驗內幕交易的執法情況外，同時針對法院在解釋犯罪構成上所呈現的爭議，進行進一步的評估。文中依照觀察面向的差異，特別鎖定三個重要的子議題：內幕信息的類型及其認定、被告「知悉」的司法判準、刑事處罰的比例性在內幕交易罪中的運用與體現。以上述實證研究結果為基礎，本文擬對於中國大陸內幕交易罪之司法執行效力提出評估，同時也補充性地可提供臺灣一定之參考。Insider trading has long been recognized as one of the key elements in modern securities law. As a massive but relatively young market, how China handles this issue is a topic rich in comparative value. On its face, the law and regulations prohibiting insider trading in securities transactions have already in place for more than two decades. However, their actual implementation, as well as how courts interpret the elements of insider trading offense in cases, are still obscure to outside observers. The lack of in-depth empirical investigation in its enforcement further creates an extra layer of complexity to the relevant research. Due to the problems mentioned above, this paper conducts an empirical study of the insider trading criminal cases, ranging from 1997 to 2019, to examine how insider trading cases are enforced in China. By observing the actual cases and their attributes, this paper presents a comprehensive picture of who commits insider trading law in China and how courts decide these cases. Three sub-set issues of the implementation are under special scrutiny:types of information and defendants; standard of proving defendant's scienter; and the relationship between sanction and illegal gain. Based on the results of this study, we evaluate the effectiveness of the enforcement on insider trading law in China in its first two decades of existence.

Pathogen infection influences the relationship between spring and autumn phenology at the seedling and leaf level

Oecologia ◽  
2021 ◽  
Author(s):  
Jessie Mutz ◽  
Ryan McClory ◽  
Laura J. A. van Dijk ◽  
Johan Ehrlén ◽  
Ayco J. M. Tack
Keyword(s):  
Pathogen Infection ◽  
Leaf Level ◽  
The Relationship

Ntrauterine programming of women’s health as a determinant of the reproductive potential of a population

2017 ◽  
pp. 10-15
Author(s):  
L.G. Nazarenko ◽  
◽  
N.S. Nestertsova ◽  
Keyword(s):  
World Literature ◽  
System Development ◽  
Reproductive Potential ◽  
The Body ◽  
Large For Gestational Age ◽  
Relevant Research ◽  
Gynecological Diseases ◽  
The World ◽  
Oncological Diseases ◽  
The Relationship

The relationship between the body weight of women at birth and the development in the future of gynecological diseases or deviations in the development of the reproductive system, development of oncological diseases and the timing of menopause have been analyzed. The results of clinical studies conducted at different times in different countries of the world, which cover the topic of this article, are presented. An overview of the world literature presented in the article, substantiates the relevance of conducting relevant research in the Ukrainian population. Key words: low birth weight, large-for-gestational-age fetus, gynecology disease.

scholarly journals A comparative study on the relationship between the scale of cities and urban environmental indicators in Japan, Korea and China.

2000 ◽  
Vol 28 ◽  
pp. 399-410
Author(s):  
Shinji KANEKO ◽  
Akira IMAI ◽  
Hirofumi NAKAYAMA ◽  
Xuemei BAI ◽  
Hidefumi IMURA
Keyword(s):  
Comparative Study ◽  
Environmental Indicators ◽  
The Relationship
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