Evaluation of physico-chemical properties, trace metal content and antioxidant activity of Indian honeys

2012 ◽  
Vol 48 (3) ◽  
pp. 578-587 ◽  
Author(s):  
Rajni Kamboj ◽  
Manav Bandhu Bera ◽  
Vikas Nanda
Keyword(s):  
Antioxidant Activity ◽  
Trace Metal ◽  
Metal Content ◽  
Chemical Properties ◽  
Physico Chemical ◽  
Trace Metal Content

Copper complexing properties, trace metal content and organic matter physico-chemical characterization of Greek beers

2017 ◽  
Vol 135 ◽  
pp. 66-73 ◽  
Author(s):  
Aikaterini Sakellari ◽  
Sotirios Karavoltsos ◽  
Marta Plavšić ◽  
Eleni Bempi ◽  
Georgia Papantonopoulou ◽  
...  
Keyword(s):  
Organic Matter ◽  
Trace Metal ◽  
Metal Content ◽  
Chemical Characterization ◽  
Physico Chemical ◽  
Trace Metal Content ◽  
Complexing Properties

Astaxanthin–garlic oil nanoemulsions preparation using spontaneous microemulsification technique: optimization and their physico–chemical properties

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Seyedalireza Mortazavi Tabrizi ◽  
Afshin Javadi ◽  
Navideh Anarjan ◽  
Seyyed Javid Mortazavi Tabrizi ◽  
Hamid Mirzaei
Keyword(s):  
Antioxidant Activity ◽  
Particle Size ◽  
Subcritical Water ◽  
Chemical Properties ◽  
Polydispersity Index ◽  
Garlic Oil ◽  
Physico Chemical ◽  
Minimum Particle Size ◽  
Oil In Water ◽  
Technique Optimization

AbstractGarlic oil in water nanoemulsion was resulted through subcritical water method (temperature of 120 °C and pressure of 1.5 bar, for 2 h), using aponin, as emulsifier. Based on the prepared garlic oil nanoemulsion, astaxanthin–garlic oil nanoemulsions were prepared using spontaneous microemulsification technique. Response surface methodology was employed to evaluate the effects of independent variables namely, amount of garlic oil nanoemulsion (1–9 mL) and amount of provided astaxanthin powder (1–9 g) on particle size and polydispersity index (PDI) of the resulted nanoemulsions. Results of optimization indicated that well dispersed and spherical nanodroplets were formed in the nanoemulsions with minimum particle size (76 nm) and polydispersity index (PDI, 0.358) and maximum zeta potential value (−8.01 mV), using garlic oil nanoemulsion amount of 8.27 mL and 4.15 g of astaxanthin powder. Strong antioxidant activity (>100%) of the prepared astaxanthin–garlic oil nanoemulsion, using obtained optimum amounts of the components, could be related to the highest antioxidant activity of the colloidal astaxanthin (>100%) as compared to that of the garlic oil nanoemulsion (16.4%). However, higher bactericidal activity of the resulted nanoemulsion against Escherichia coli and Staphylococcus aureus, were related to the main sulfur bioactive components of the garlic oil in which their main functional groups were detected by Fourier transform-infrared spectroscopy.

Trace-metal content of Mississippi oil field brines

1990 ◽  
Vol 37 (2) ◽  
pp. 171-183 ◽  
Author(s):  
James A. Saunders ◽  
Charles T. Swann
Keyword(s):  
Trace Metal ◽  
Metal Content ◽  
Oil Field ◽  
Trace Metal Content

scholarly journals Concentrations of Essential Trace Metals in the Brain of Animal Species—A Comparative Study

2020 ◽  
Vol 10 (7) ◽  
pp. 460 ◽  
Author(s):  
Chiara Alessia DeBenedictis ◽  
Andrea Raab ◽  
Ellen Ducie ◽  
Shauna Howley ◽  
Joerg Feldmann ◽  
...  
Keyword(s):  
Nervous System ◽  
Trace Metals ◽  
Trace Metal ◽  
Metal Content ◽  
Brain Size ◽  
Physiological Role ◽  
Physiological Concentration ◽  
Specific Distribution ◽  
Trace Metal Content ◽  
The Brain

The essential trace metals iron, zinc, and copper have a significant physiological role in healthy brain development and function. Especially zinc is important for neurogenesis, synaptogenesis, synaptic transmission and plasticity, and neurite outgrowth. Given the key role of trace metals in many cellular processes, it is important to maintain adequate levels in the brain. However, the physiological concentration of trace metals, and in particular zinc, in the human and animal brain is not well described so far. For example, little is known about the trace metal content of the brain of animals outside the class of mammals. Here, we report the concentration of iron, zinc, and copper in fresh brain tissue of different model-species of the phyla Chordata (vertebrates (mammals, fish)), Annelida, Arthropoda (insects), and Mollusca (snails), using inductively coupled plasma mass-spectrometry (ICP-MS). Our results show that the trace metals are present in the nervous system of all species and that significant differences can be detected between species of different phyla. We further show that a region-specific distribution of metals within the nervous system already exists in earthworms, hinting at a tightly controlled metal distribution. In line with this, the trace metal content of the brain of different species does not simply correlate with brain size. We conclude that although the functional consequences of the controlled metal homeostasis within the brain of many species remains elusive, trace metal biology may not only play an important role in the nervous system of mammals but across the whole animal kingdom.

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