Article
Chemistry, Analytical
Ana M. Jimenez-Carvelo, Sandra Martin-Torres, Fidel Ortega-Gavilan, J. Camacho
Summary: Conventional PLS-DA and sparse sPLS-DA were effectively used to authenticate avocado samples by analyzing lipid chromatographic fingerprints. The concatenated classification models successfully resolved multiclass problems in food authentication, with performance metrics around 0.95 for both multivariate classification methods.
Article
Environmental Sciences
Amanda L. Bayless, Steven J. Christopher, Russell D. Day, Jennifer M. Ness, Colleen E. Bryan, Anna Toline, Cheryl M. Woodley
Summary: Biological impairments have been observed on reefs at two national parks in St. Croix, USVI, with potential impacts from water quality parameters and trace elements (such as Cu, Pb, Zn) that may originate from anthropogenic sources. Analyzing trace elements in coral skeletons and stable isotope levels can help identify potential pollution sources and determine the heavy metal impacts on these invaluable reefs.
MARINE POLLUTION BULLETIN
(2021)
Article
Geology
Huichuan Liu, Sune G. Nielsen, Guangyou Zhu
Summary: This study identified a Prototethyan continental arc in the southeast Tibetan Plateau, which showed no detectable continental material contributions in the magmas. The findings suggest that the arc magmas were generated by melting of a melange at the slab-mantle interface.
Article
Geology
Huichuan Liu, Sune G. Nielsen, Guangyou Zhu
Summary: In this study, a Prototethyan continental arc was discovered in the Dazhonghe area of the southeast Tibetan Plateau, which shows no detectable contributions from continental material. The low delta Si-30 values in the Dazhonghe arc rocks can be explained by subduction of sponge-rich marine sediments. Mixing calculations suggest that the Dazhonghe arc magmas were generated by melting of a melange formed at the slab-mantle interface.
Article
Agriculture, Multidisciplinary
Chunlin Li, Qiang Wang, Shengzhi Shao, Zhaoming Chen, Jing Nie, Zhi Liu, Karyne M. Rogers, Yuwei Yuan
Summary: This study investigates the isotopic response and fractionation of different biogas slurry (BS) application rates on organic rice cultivation in China. Results show that increasing BS application rates lead to enriched N-15 isotopic markers in soil, straw, and rice, indicating its organically cultivated status. N fractionation was observed between rice, straw, and soil, with their isotopic values showing strong correlations.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2021)
Article
Energy & Fuels
Nura Abdulmumini Yelwa, Khairul Azlan Mustapha, Mimonitu Opuwari, Azharuddin Abd Aziz
Summary: The study integrated molecular geochemistry, inorganic and isotopic studies to recognize the geochemical characteristics of sediments from the Aptian to Campanian periods in the Western offshore to Central Orange Basin. The results showed that the sediments were predominantly influenced by marine sources, with some samples being thermally mature enough to produce petroleum. Geochemical analysis also indicated a continental rift of passive margin settings, revealing the breakup of Gondwana and the opening of the Atlantic Ocean Margin.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2022)
Article
Chemistry, Applied
Liu Zhi, Wei Yuan, Yudi Hao, Liu Wei, Li Bin, Guiyuan Meng
Summary: Stable isotope and multi-element analytical techniques with chemometrics were used to trace the origin authenticity of rice in China market. A total of 115 batches of rice samples from 8 main producing areas of 7 Asian countries were analyzed. Supervised multivariate modeling methods like PLS-DA and LDA showed higher accuracy in identifying rice origins compared to ANOVA and unsupervised methods. δ2H, δ13C, Ba, Al, Mg, δ34S, Pb, and δ18O were identified as important variables for rice origin traceability. This analytical strategy can help ensure the authenticity of rice origin and combat mislabeling in rice trade.
Article
Food Science & Technology
Marina De Gea Neves, Ronei Jesus Poppi, Marcia Cristina Breitkreitz
Summary: The study developed a non-invasive and rapid method using NIR and chemometric tools to determine the authenticity of plant-based protein powders and classify possible adulterations. By combining OC-PLS for authentication and PLS2-DA for adulterant classification, the methodology showed high sensitivity and specificity in detecting adulterants such as soy, whey, and wheat in the protein powders.
Article
Agriculture, Multidisciplinary
Zatil A. Athaillah, Chris Yarnes, Selina C. Wang
Summary: This study suggests that the use of stable isotope analysis of fatty acids and amino acids can help differentiate the geographical provenance of walnuts.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Chemistry, Applied
Seung-Hyun Kim, Joon-Kwan Moon, Hyeong-Wook Jo, Jung-Tae Kim
Summary: The study evaluated the feasibility of using compound-specific isotope analyses to distinguish eco-friendly shiitake from conventional counterparts, showing a higher classification accuracy. The compound-specific isotope model was effective in discriminating different types of eco-friendly shiitake, offering unique advantages compared to traditional authentication methods.
Article
Environmental Sciences
Sheng-Nan Zhang, Yi Gu, Zhen-Li Zhu, Sheng-Hong Hu, Peter M. Kopittke, Fang-Jie Zhao, Peng Wang
Summary: The analysis of Cd isotope ratios in soil, rice grain, and human urine samples from two Cd-contaminated regions in southern China revealed a preferential enrichment of heavy Cd isotopes from soil to rice grain and from grain to urine. The fractionation of Cd isotopes in the soil-rice-human continuum is likely due to processes such as partitioning between the soil solid phase and soil solution, as well as preferential enrichment by metal transporters in humans.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Energy & Fuels
Lipeng Yao, Ningning Zhong, Imran Khan, Juan Chen, Qingyong Luo, Yu Zhang, Jiayi Ai, Wen Sun
Summary: In-source solid bitumen was discovered in an overmature black shale in Guizhou, China, providing a substitute for studying the physical and chemical properties of in-situ solid bitumen. The in-source solid bitumen displays a homogeneous structure distinct from the migrated bitumen in the Ediacaran-Cambrian carbonate reservoir. The stable carbon isotope ratios and distribution patterns of trace elements suggest a connection between the insource solid bitumen and the migrated bitumen, supporting the tracing of oil and gas sources in the area.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Matteo Perini, Alessio Gaggiotti, Silvia Pianezze, Luca Ziller, Roberto Larcher
Summary: CBD, a non-psychoactive cannabinoid of Cannabis sativa, has been shown to have anti-inflammatory and antioxidant properties. This study demonstrates that stable isotope analysis of oxygen and hydrogen can effectively distinguish between CBD from natural sources and chemically synthesized CBD. Threshold values have been identified to determine the origin of CBD, with higher values indicating a non-entirely natural source (biosynthetic molecule).
Article
Environmental Sciences
Felix Ortmeyer, Stefan Wohnlich, Andre Banning
Summary: Enhanced denitrification for treating nitrate-polluted groundwater can lead to significant changes in redox potential and pH, affecting the mobility of trace elements. It is important to consider trace element concentrations such as nickel when evaluating enhanced denitrification, as added organic carbon can help immobilize and lower their concentrations in the water.
Article
Geochemistry & Geophysics
J. W. D. Strong, P. A. Cawood, A. R. Cruden, O. Nebel, J. Mulder, A. P. Dickin
Summary: The Winnipeg River terrane, one of the oldest plutonic-gneiss terranes in the Archean Superior Province, plays a crucial role in understanding the evolution of Earth's largest Archean craton. The study evaluates the evolution of this terrane using various isotope data, revealing important information about rock crystallization and crustal recycling.
Article
Chemistry, Applied
Wei Xia, Chunlin Li, Jing Nie, Shengzhi Shao, Karyne M. Rogers, Yongzhi Zhang, Zuguang Li, Yuwei Yuan
Summary: The study revealed that the isotopic composition of tea leaves varied under different light and temperature conditions, with a negative correlation observed between isotopes and photosynthetic parameters. This finding provides new insights for predicting tea isotope responses to subtle seasonal or climate change conditions.
Article
Ecology
Priscilla M. Wehi, Karyne M. Rogers, Tim Jowett, Amandine J. M. Sabadel
Summary: This study investigates the feather stable isotope values in kea populations in New Zealand and finds a lower trophic position in modern kea populations, reflecting reduced lowland habitat and a mixed diet with more plant material. The study also identifies size and sex as factors influencing trophic values in kea, with larger birds more likely to have a high protein diet. The findings suggest potential changes in ecological networks and sexually dimorphic feeding patterns within kea species.
JOURNAL OF ANIMAL ECOLOGY
(2023)
Article
Multidisciplinary Sciences
R. T. Kramer, R. L. Kinaston, P. W. Holder, K. F. Armstrong, C. L. King, W. D. K. Sipple, A. P. Martin, G. Pradel, R. E. Turnbull, K. M. Rogers, M. Reid, D. Barr, K. G. Wijenayake, H. R. Buckley, C. H. Stirling, C. P. Bataille
Summary: This article introduces the use of strontium isotope analysis to trace the origin of locally produced agricultural products in New Zealand, and establishes a regional bioavailable strontium isoscape. By testing the source of cow milk, the article demonstrates the potential of this model.
Article
Chemistry, Applied
Xing Liu, Bin Bai, Karyne M. Rogers, Dan Wu, Qunli Qian, Fang Qi, Jiaxin Zhou, Chunxia Yao, Weiguo Song
Summary: This research developed a combination of NIR and IRMS methods with chemometrics to successfully identify the origin and cultivation methods of Shanghai special rice, providing an effective means to protect the quality of these products.
Article
Chemistry, Applied
Jing Nie, Rui Weng, Chunlin Li, Xiuhua Liu, Fang Wang, Karyne M. Rogers, Yongzhong Qian, Yongzhi Zhang, Yuwei Yuan
Summary: Geographical origin significantly influences the stable isotopes, elemental contents, and sulfur-containing compounds in Chinese garlic. Models utilizing these features provide a high accuracy method for authenticating the origin of Chinese garlic.
Review
Chemistry, Applied
Syed Abdul Wadood, Jing Nie, Chunlin Li, Karyne M. Rogers, Abbas Khan, Wahab Ali Khan, Aiza Qamar, Yongzhi Zhang, Yuan Yuwei
Summary: The authenticity of rice has become an important issue, and various analytical techniques and multivariate analysis methods have been employed to authenticate and discriminate rice.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2022)
Article
Geochemistry & Geophysics
A. P. Martin, C. Lim, M. Kah, M. S. Rattenbury, K. M. Rogers, E. L. Sharp, R. E. Turnbull
Summary: Soil chemistry is influenced by environmental conditions, parent material and human activities. Cities built on volcanic rock, like Auckland, have unique and important soil characteristics. This study analyzed the geochemical properties of urban soils in Auckland and found that volcanic parent material and C4 grasses significantly influenced the soil composition. Metal contamination in urban soils was associated with anthropogenic sources, such as leaded paint, industrialization, and pesticide residues. Comparison with other urban areas built on volcanic rock or non-volcanic substrates showed that the duration of urbanization and the age and quality of housing are important factors in soil pollution. Cities like Auckland and Naples have elevated levels of certain elements in their soils compared to cities with non-volcanic substrates, such as Arica.
APPLIED GEOCHEMISTRY
(2023)
Review
Chemistry, Applied
Chunlin Li, Xuming Kang, Jing Nie, An Li, Mohamed A. Farag, Cuiling Liu, Karyne M. Rogers, Jianbo Xiao, Yuwei Yuan
Summary: Over the last decade, isotope ratio mass spectrometry (IRMS) using multiple light stable isotopes has been widely applied in China for food origin verification and authentication. It has successfully characterized and identified Chinese food products, reducing fraud, improving food safety, and enhancing consumer trust and government regulatory policies.
Article
Engineering, Civil
Karyne M. Rogers, Rob van der Raaij, Andy Phillips, Mike Stewart
Summary: A national survey in New Zealand uses nitrogen and oxygen isotopes to identify the extent and sources of nitrates in freshwater resources. The study investigates the impact of various factors on nitrate isotopes and finds that nitrate contamination is a significant threat to drinking water resources in New Zealand. Groundwater has higher nitrate concentrations compared to surface water, and the unique farming practices in New Zealand contribute to the nitrate pollution.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Civil
Hao Wu, Haiquan Chen, Bingqing Yi, Karyne M. Rogers, Xuehai Bian, Ni Lin, Xiuwen Zhou, Baohui Jin, Zhi Yan, Haichao Zhou
Summary: This study comprehensively analyzed 96 bottled mineral water samples from different origins including China, France, Italy, New Zealand, and Fiji. By investigating various factors such as dissolved inorganic carbon, water isotopes, mineral elements, and ions, the researchers were able to trace the origin of the mineral water. The results showed significant variations in the composition of mineral water from different regions, and statistical models were successful in accurately distinguishing the origins of the water samples.
JOURNAL OF HYDROLOGY
(2023)
Article
Food Science & Technology
Karyne M. Rogers, Andy Phillips, Joan Fitzgerald, Pam Rogers, Jannine Cooper, Andrew J. Pearson, Jing Nie, Zhi Liu, Yongzhi Zhang, Shengzhi Shao, Yuwei Yuan
Summary: Stable isotopes were used to characterize samples of New Zealand butter and accurately distinguish it from butter of other origins. The unique isotope signatures of New Zealand butter allowed it to be differentiated from Australian and Irish butter, but not completely from them. Stable isotopes offer a reliable tool to identify mislabeled New Zealand butter in key international export markets.
INTERNATIONAL DAIRY JOURNAL
(2023)
Article
Chemistry, Applied
Tingting Song, Zhenzhen Xia, Cuiling Liu, Jing Nie, Youxiang Zhou, Syed Abdul Wadood, Yongzhi Zhang, Chunlin Li, Karyne M. Rogers, Yuwei Yuan
Summary: Geographical origin discrimination of Shiitake mushrooms is important for food safety and fair trade. Stable isotopes and elemental contents were used to analyze samples from three major production regions in China, and significant differences were found among the regions.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2023)
Article
Chemistry, Analytical
Hanyi Mei, Jing Nie, Shu Wang, Yongzhi Zhang, Chunlin Li, Shengzhi Shao, Shanshan Shao, Karyne M. Rogers, Yuwei Yuan
Summary: This study successfully achieved the geographical identification of Hangbaiju by using stable isotopes and multivariate statistical analysis. The results showed significant differences in stable isotopic compositions among different producing regions of Hangbaiju, as well as significant isotopic variations at different growth stages.
Review
Green & Sustainable Science & Technology
Lucjan Sajkowski, Rose Turnbull, Karyne Rogers
Summary: This study compiles publicly available datasets on the chemical composition of geothermal fluids from wells in the Taupo Volcanic Zone (TVZ) and Ngawha, New Zealand. The combined data provide a new perspective on geothermal reservoir water compositions in the TVZ and Ngawha, enabling assessment and comparison. These findings are valuable for future research projects and investment opportunities. Additionally, the study estimates the annual flux of critical elements in New Zealand's geothermal systems, with economically extractable quantities present.
Article
Agriculture, Multidisciplinary
Yuchen Meng, Baohui Jin, Karyne M. Rogers, Haichao Zhou, Xin Song, Yihui Zhang, Guanghui Lin, Hao Wu
Summary: This study examined water isotope fractionation models in different grapevine tissues and organs in the Helan Mountains, a major wine-producing area in northwestern China. The results indicated that the d(2)H values of local groundwater sources were more negative, while rivers and precipitation had higher values. Soil water had significantly higher d(2)H and d(18)O values compared to other environmental water sources. The study also found that O-18/16 fractionation in grapes is more likely to occur under drought conditions, which has implications for traceability accuracy and origin protection in wine production areas.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)