Review
Biochemistry & Molecular Biology
Ewa Olechno, Anna Puscion-Jakubik, Katarzyna Socha, Malgorzata Elzbieta Zujko
Summary: Studies have shown that coffee infusions contain trace elements with antioxidant activity such as manganese, zinc, copper, iron, fluoride, chromium, and cobalt, which can contribute to meeting certain nutritional requirements. The origin of coffee beans and the type of water used may impact the mineral content in infusions, while the brewing method does not seem to have a significant role. Further research in this area is needed to explore the bioavailability of these micronutrients in coffee.
Article
Biochemistry & Molecular Biology
Katharina Butsch, Alexander Haseloer, Simon Schmitz, Ingo Ott, Julia Schur, Axel Klein
Summary: Three complexes containing the non-innocent anionic ligand opo(-) were synthesized and characterized using spectroscopic techniques. The compounds show distinct electronic and optical properties, with potential antiproliferative activities against cancer cell lines.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Engineering, Chemical
Xiande Xie, Jingxia Li, Jing Liu, Zhuo Chen, Xiaoqing Yuan, Tao Chen, Lin Luo
Summary: Chromium picolinate (Cr(pic)3), widely used in animal feeding, can be introduced to the environment through animal waste, leading to chromium contamination risk. Direct adsorption and precipitation methods for removing chromium in Cr(pic)3 form are difficult. This study investigated the treatment of Cr(pic)3 using the Fenton process and found that it can effectively degrade Cr(pic)3 and remove chromium simultaneously, making it promising for treating Cr(pic)3-containing wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Environmental Sciences
A. L. Nascimento Junior, A. de Q. Paiva, L. S. Souza, L. F. Souza-Filho, L. D. Souza, E. I. Fernandes Filho, C. E. R. G. Schaefer, E. F. Silva, A. C. O. Fernandes, F. A. S. Xavier
Summary: This study evaluated the presence and concentration of heavy metals in plants and soil in the semiarid region of Irece, state of Bahia, Brazil, and found that heavy metals were mainly concentrated in the roots of plants, indicating a plant protection mechanism to prevent their translocation to the aerial parts.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Chao Tian, Na Zhao, Xinyue Jiang, Duanji Wan, Yuqun Xie
Summary: The study demonstrates a novel method for rapid and accurate quantification of VB12 in biological samples without the need for complicated sample pretreatment steps. The electrochemical oxidation step, combined with a copper oxide nanocrystal decorated graphenic electrode, enhances detection efficiency and sensitivity. The proposed electrode shows potential in terms of efficiency, reliability, and accuracy for the rapid determination of VB12 in biological samples.
Article
Pediatrics
Laxmi Kamath, Vinod H. Ratageri, Apurva S. Kanthi, S. R. Fattepur, R. H. Desai
Summary: This study aimed to determine the levels of vitamin B12 and other micronutrients in children with severe acute malnutrition (SAM). The findings revealed that deficiency of vitamin B12 and cobalt were more prevalent than other micronutrients.
INDIAN JOURNAL OF PEDIATRICS
(2023)
Article
Agriculture, Dairy & Animal Science
Laura Perillo, Francesca Arfuso, Giuseppe Piccione, Salvatore Dara, Emanuela Tropia, Giuseppe Cascone, Francesca Licitra, Vincenzo Monteverde
Summary: This study evaluates the levels of selected heavy metals in hair samples of Holstein dairy cows and suggests the usefulness of hair samples as bioindicators of heavy metal exposure. The research highlights the impact of anthropogenic activities on heavy metal accumulation in cows from Ragusa. The low concentration of heavy metals in the hair samples indicates that cows were not exposed to high levels of these compounds, preventing bioaccumulation.
Article
Biochemistry & Molecular Biology
Aleksandra Kuzan, Marta Wujczyk, Rafal J. Wiglusz
Summary: Atherosclerosis is a multifactorial disease with a complex etiology that currently cannot be effectively prevented or reduce mortality from cardiovascular diseases. Analyzing the levels of micro- and macroelements has revealed interrelationships between elements during atherogenesis, providing important insights for further understanding the pathomechanism of atherosclerosis and the impact of dietary supplements on cardiovascular diseases in the future.
Article
Biochemistry & Molecular Biology
Kaiwen Mu, David D. Kitts
Summary: This article discusses the functional role of dietary polyphenols in maintaining intestinal cell homeostasis, with a focus on the role of aquaporins. It is found that certain plant phenolic compounds undergo autoxidation to generate H2O2, thus functioning as intracellular antioxidants. Aquaporins regulate the intracellular uptake of H2O2 generated from extracellular polyphenol autoxidation, thereby mitigating oxidative stress and intestinal inflammation. Through adduction to a thiol group on the Keap1-Nrf2 complex, polyphenols trigger Nrf2 activation and a cascade of indirect intracellular antioxidant effects. Therefore, aquaporin expression represents an important mechanism for intracellular antioxidant chemoprotection.
Article
Environmental Sciences
Yawen Yuan, Shutong Chen, Bin Yao, Anwei Chen, Liang Pei, Si Luo, Yaoyu Zhou
Summary: A Fe3+/persulfate system enhanced with a natural ligand cysteine was employed for the degradation of quinclorac, which widened the effective pH range and increased the removal rate for quinclorac. The mechanism was revealed that the Fe3+/Cys/PS system can enhance the ability of degrading quinclorac by accelerating the Fe3+/Fe2+ redox cycle and generating more reactive oxygen species. The impact factors were also optimized. This study provides a promising strategy for organic contaminated water remediation with high catalytic activity and wide pH tolerance.
ENVIRONMENTAL RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Tao Shi, Paulien E. Polderman, Marc Pages-Gallego, Robert M. Van Es, Harmjan R. Vos, Boudewijn M. T. Burgering, Tobias B. Dansen
Summary: Reversible cysteine oxidation is crucial in redox signaling and plays a role in altering protein structure and function. The tumor suppressor p53 is known to be redox-sensitive and can form disulfide-dependent interactions with other proteins under oxidizing conditions, potentially playing a role in regulating p53 activity.
Article
Biochemistry & Molecular Biology
Kristina Lossow, Maria Schwarz, Anna P. Kipp
Summary: Cancer remains a major cause of death worldwide, and early diagnosis is critical for improved survival rates and treatment success. Studies have shown that cancer patients generally have elevated serum copper levels and diminished zinc levels, with inconsistent changes in selenium and iron levels depending on the type of cancer. Further research is needed to investigate whether these element concentrations can predict the survival probability of cancer patients.
Article
Geochemistry & Geophysics
M. M. Hirschmann
Summary: The mantles of Earth and Mars are more oxidized than expected, likely due to high pressure equilibration of silicate-alloy generating more ferric iron.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Yuto Shimoyama, Naoki Ogiwara, Zhewei Weng, Sayaka Uchida
Summary: By utilizing porous ionic crystals (PICs), a composition-structure-function relationship of polyoxometalates (POMs) catalysts has been established, revealing that the synergistic catalysis originates from charge transfer from the Cr complex to [alpha-CoW12O40].
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Food Science & Technology
Yi Ding, Pei Jun Lim, Jayler Goh, Qi Lin, Paul W. Johns
Summary: Reducing agents and oxidizing agents have different effects on the stability of cyanocobalamin. Adding thiol or dithionite increases the loss of cyanocobalamin, while adding an oxidizing agent generally improves its recovery. The instability of cyanocobalamin in heat-treated non-fat milk is caused by a combination of heat, cystine/cysteine, oxygen, and low levels of transition metals. The proposed decomposition pathway involves complexation with heat-exposed cysteine thiolate, cobalt reduction, hydrolysis of the complex, conversion to hydroxocobalamin, and irreversible oxidation.
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Applied
Gina Chew, Lay Peng Sim, Sin Yee Ng, Yi Ding, Richard Y. C. Shin, Tong Kooi Lee
Article
Chemistry, Analytical
Qi Lin, Yi Ding, Fiona Poh, Chunyan Zhang, Shang-Jing Pan, Karen J. Schimpf
JOURNAL OF AOAC INTERNATIONAL
(2017)
Article
Nutrition & Dietetics
Laura Hackl, Michael B. Zimmermann, Christophe Zeder, Megan Parker, Paul W. Johns, Richard F. Hurrell, Diego Moretti
JOURNAL OF NUTRITION
(2017)
Article
Biochemistry & Molecular Biology
Chang Xu, Yi Ding, Ho Wah Leung, Benny Meng Kiat Tong, Richard Y. C. Shin, Tong Kooi Lee
JOURNAL OF TRACE ELEMENTS IN MEDICINE AND BIOLOGY
(2017)
Article
Physics, Atomic, Molecular & Chemical
Sin Yee Ng, Aimei Zou, Lay Peng Sim, Yi Ding, Kim Loong Yuen, Richard Y. C. Shin, Tong Kooi Lee
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
(2012)
Article
Chemistry, Inorganic & Nuclear
Yi Zhang, Yi Ding, Sumod A. Pullarkat, Yongxin Li, Pak-Hing Leung
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2011)
Article
Food Science & Technology
Paul W. Johns
Summary: The method described in the study provides a simple and effective way to accurately and precisely determine sulfur amino acids in protein powders and nutritional products, without the need for specialized amino acid analysis instrumentation. It involves acid hydrolysis and direct LC/UV quantification, with assessments showing good performance in terms of linearity, precision, accuracy, selectivity, and quantitation limit.
FOOD ANALYTICAL METHODS
(2021)
Article
Food Science & Technology
Ding Yi, Qi Lin, Paul W. Johns
Summary: The study evaluated the DH of commercial protein hydrolysates by estimating from their MW values obtained by HPSEC/UV, eliminating the need for a second test. The accuracy of the method was confirmed by comparing the estimated DH to the DH determined by TNBS colorimetry, showing good agreement with R-2 > 0.95. This approach demonstrated that reliable estimates of protein hydrolysate DH can be obtained from MW values, potentially eliminating the need for a separate DH test.
FOOD ANALYTICAL METHODS
(2021)
Article
Food Science & Technology
Paul W. Johns
Summary: The pink discolouration found in a casein hydrolysate may be related to the substantial cystine loss. These characteristics, along with the free amino acids in the hydrolysate, may be associated with onion pinking.
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Food Science & Technology
Paul W. Johns, Steven R. Hertzler
Summary: Glutamine and asparagine content in common protein ingredients and commercial nutritional products can be reliably estimated from published data, with resistance of protein-bound glutamine and asparagine to deamidation during product processing being confirmed. Free ammonia in protein hydrolysates is correlated with the degree of hydrolysis, indicating a decrease in glutamine content as the degree of hydrolysis increases.
FOOD ANALYTICAL METHODS
(2021)
Article
Chemistry, Analytical
Paul W. Johns
Summary: The method described in the text utilizes size exclusion chromatography and UV absorbance to determine residual protein in commercial human milk oligosaccharides. Through various performance assessments, this method is proven to be a simple and effective means for quantifying protein levels in oligosaccharides.
ACCREDITATION AND QUALITY ASSURANCE
(2021)
Article
Food Science & Technology
Yi Ding, Pei Jun Lim, Jayler Goh, Qi Lin, Paul W. Johns
Summary: Reducing agents and oxidizing agents have different effects on the stability of cyanocobalamin. Adding thiol or dithionite increases the loss of cyanocobalamin, while adding an oxidizing agent generally improves its recovery. The instability of cyanocobalamin in heat-treated non-fat milk is caused by a combination of heat, cystine/cysteine, oxygen, and low levels of transition metals. The proposed decomposition pathway involves complexation with heat-exposed cysteine thiolate, cobalt reduction, hydrolysis of the complex, conversion to hydroxocobalamin, and irreversible oxidation.
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
(2023)
