Zobrazeno 1 - 10
of 2 785
pro vyhledávání: '"NITROGEN ISOTOPE"'
Publikováno v:
Progress in Earth and Planetary Science, Vol 11, Iss 1, Pp 1-13 (2024)
Abstract Cold seeps, where geofluids containing methane and other hydrocarbons originating from the subseafloor seeps through the sediment surface, play important roles in the elemental and energy flux between sediment and seawater. These seep sites
Externí odkaz:
https://doaj.org/article/49fb2d2a1df94131bada481e8fa75ecb
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-16 (2024)
Abstract Understanding the nitrogen isotopic variations of individual amino acids (AAs) is essential for utilizing the nitrogen isotope values of individual amino acids (δ15N-AA) as source indicators to identify proteinaceous matter originating from
Externí odkaz:
https://doaj.org/article/af23165cbd514381aa616682447bc76a
Publikováno v:
Water Research X, Vol 25, Iss , Pp 100249- (2024)
The rapid expansion of coastal aquaculture has led to an increase in the coverage of aquaculture ponds, where intense feed-derived nitrogen is causing significant emissions of nitrous oxide (N2O). Multiple N2O production pathways and the relative imp
Externí odkaz:
https://doaj.org/article/07b09c8a5ee34d0e836c3cc8e7ac8434
Autor:
Haili YANG
Publikováno v:
Journal of Isotopes, Vol 37, Iss 3, Pp 218-226 (2024)
Ammonium is a key dissolved inorganic nitrogen (DIN) in the biogeochemical cycle of nitrogen in the ocean. Depending on the environment，the 15N natural abundance (δ15Nair ) of NH4+ can provide insights into N sources and mechanisms of N transforma
Externí odkaz:
https://doaj.org/article/2f55615460474131951bffed7cfc7e2a
Autor:
Ping Wang, Jian Wang, Yuansheng Du, Wenchao Yu, Qi Zhou, Li Tian, Liangjun Yuan, Wen Pan, Wei Wei, Yongjun Qin, Zhixin Ma
Publikováno v:
Frontiers in Marine Science, Vol 11 (2024)
The Nanhua Basin of South China recorded complete Cryogenian stratigraphic sequence from the Sturtian Glaciation (~717–660 Ma) to the Marinoan Glaciation (~654–635 Ma). The interglacial Datangpo Fm in the Nanhua Basin is divided into two members,
Externí odkaz:
https://doaj.org/article/e2c544c7fae34a9ba095da19325cc385
Autor:
Heather A. Donnelly, Maria Valadez-Ingersoll, Marcus Lin, Hanny E. Rivera, Carlos A. Tramonte, Sarah W. Davies, Xingchen Tony Wang
Publikováno v:
Frontiers in Marine Science, Vol 11 (2024)
The resilience of coral reefs in oligotrophic, (sub)tropical oceans is largely due to the symbiotic relationship between scleractinian corals and Symbiodiniaceae algae, which enables efficient internal nutrient recycling. Investigating the history of
Externí odkaz:
https://doaj.org/article/2a385204a81c4c7197719d3851302229
Publikováno v:
Guangxi Zhiwu, Vol 44, Iss 3, Pp 576-585 (2024)
Nitrate is predominant in the karst soils. However, the temporal and spatial heterogeneities are observed for the nitrate content in the soils. Hence, the Morus alba seedlings grown in karst regions may suffer from low nitrogen stress. In order to pr
Externí odkaz:
https://doaj.org/article/b2eb14ce18de4f61b4f34782ba755416
Autor:
Jose Antonio Canseco, Edwin J. Niklitschek, Claudio Quezada-Romegialli, Chris Yarnes, Chris Harrod
Publikováno v:
PeerJ, Vol 12, p e17372 (2024)
Quantifying the tropic position (TP) of an animal species is key to understanding its ecosystem function. While both bulk and compound-specific analyses of stable isotopes are widely used for this purpose, few studies have assessed the consistency be
Externí odkaz:
https://doaj.org/article/202ec615d43c4e4cb9f8926c19c2111d
Publikováno v:
Shipin gongye ke-ji, Vol 44, Iss 23, Pp 246-252 (2023)
Objective: To prevent some illegal companies driven by interests from arbitrarily labeling "organic" to deceive consumers using ways such as counterfeiting, forgery, and shoddy food. Methods: This study investigated differential components between or
Externí odkaz:
https://doaj.org/article/b481306f1011444096fadd897dd244ef
Autor:
Mari Tõrv, Gunilla Eriksson
Publikováno v:
Eesti Arheoloogiaajakiri, Vol 27, Iss 2, Pp 98-128 (2023)
The function of European Stone Age forager sites with several burials has been debated for decades. One little-known site of this kind is the 4thâ3rd millennium cal BC Tamula I (hereinafter Tamula) in south-eastern Estonia. Bringing together the res
Externí odkaz:
https://doaj.org/article/8c61e05e655d403c8b79401734d2e1c3