scholarly journals Influence of Thermal Preparation Method on Mineral Composition of Mussels

2018 ◽  
Vol 75 (1) ◽  
pp. 78
Author(s):  
Gheorghe Valentin GORAN ◽  
Liliana TUDOREANU ◽  
Aura MOCANU ◽  
Emanuela BADEA ◽  
Victor CRIVINEANU
Keyword(s):  
Mineral Content ◽  
Preparation Method ◽  
The Other ◽  
Icp Oes ◽  
Cooking Method ◽  
Preparation Methods ◽  
Heavy Metal Concentrations ◽  
Zn Concentration ◽  
Mineral Concentrations ◽  
Thermal Preparation

This study focuses on evaluation of the effects of 3 different thermal preparation methods (boiling, roasting, microwaving) on mineral concentrations of mussels from Bucharest market. The mineral content in raw and cooked mussel samples was evaluated by ICP-OES and relative humidity of raw and cooked mussels by thermogravimetry. Se level in microwaved samples was significantly decreased compared to raw and the other 2 cooked mussel samples. Zn concentration in raw samples was not significantly different compared to those in roasted samples. Fe level was insignificantly different between boiled and roasted samples and significantly lowers in microwaved samples. Ni, Pb, and Se levels were significantly higher in boiled samples, and Cd levels were insignificantly different reported to cooking method. The percentage of water loss during roasting was lower than the other 2 thermal preparation methods. Potassium concentrations in cooked mussels were higher compared to raw ones. Mineral concentrations were highest in roasted samples and heavy metal concentrations in boiled mussels.

scholarly journals Influence of Thermal Preparation Method on Mineral Composition of Shrimps

2017 ◽  
Vol 74 (2) ◽  
pp. 90
Author(s):  
Gheorghe Valentin GORAN ◽  
Liliana TUDOREANU ◽  
Elena BADOI ◽  
Emanuela BADEA ◽  
Victor CRIVINEANU
Keyword(s):  
Trace Elements ◽  
Mineral Content ◽  
Preparation Method ◽  
The Other ◽  
Cooking Methods ◽  
Icp Oes ◽  
Cooking Method ◽  
Essential Trace Elements ◽  
Mineral Concentrations ◽  
Thermal Preparation

This study goal was to evaluate the effects of 3 different cooking methods (boiling, roasting, and microwaving) on mineral concentrations of shrimps from the Bucharest market. Mineral content in shrimp samples was evaluated by ICP-OES, and relative humidity was assessed by thermogravimetry. Cooking method insignificantly influenced the level of Fe. Ca and K levels were higher in cooked samples compared to raw shrimps, independent of cooking method. Essential (Cu, Se, and Zn), and non-essential and toxic (Al, Cd, Ni, and Pb) elements levels were significantly increased in boiled shrimps, compared to raw and the other 2 types of cooked samples. Generally, after cooking the lowest values of essential trace elements concentration was registered in roasted samples. The highest percentage of water loss was found in boiled samples. In general, thermal preparation increased mineral concentrations in cooked samples compared to raw shrimps.

Scanning electron microscopy of human iliac bone by a simple preparation method

1990 ◽  
Vol 48 (3) ◽  
pp. 226-227
Author(s):  
Toshihiko Takita ◽  
Tomonori Naguro ◽  
Toshio Kameie ◽  
Akihiro Iino ◽  
Kichizo Yamamoto
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Real Surface ◽  
Public Attention ◽  
Preparation Methods ◽  
The Real ◽  
Simple Preparation ◽  
Scanning Electron

Recently with the increase in advanced age population, the osteoporosis becomes the object of public attention in the field of orthopedics. The surface topography of the bone by scanning electron microscopy (SEM) is one of the most useful means to study the bone metabolism, that is considered to make clear the mechanism of the osteoporosis. Until today many specimen preparation methods for SEM have been reported. They are roughly classified into two; the anorganic preparation and the simple preparation. The former is suitable for observing mineralization, but has the demerit that the real surface of the bone can not be observed and, moreover, the samples prepared by this method are extremely fragile especially in the case of osteoporosis. On the other hand, the latter has the merit that the real information of the bone surface can be obtained, though it is difficult to recognize the functional situation of the bone.

Effects of preparation methods on the mineral content of tofu

2007 ◽  
Vol 17 (4) ◽  
pp. 342-347
Author(s):  
Satoko Tanaka ◽  
Toshiko Morisita ◽  
Kenji Chayama
Keyword(s):  
Mineral Content ◽  
Preparation Methods

Studies on One-Step Preparation of Multi-Color Fluorescent Carbon-Doped Silica Biological Nanomaterials

2013 ◽  
Vol 340 ◽  
pp. 362-365
Author(s):  
Wei Wei Xiong ◽  
Jing Guo ◽  
Xi Chen ◽  
Cheng Yi Zhang
Keyword(s):  
Preparation Method ◽  
The Other ◽  
Fluorescent Substance ◽  
Carbon Doped ◽  
Fluorescence Characteristics ◽  
One Step ◽  
Fluorescent Carbon

The research concentrates on the preparation of the Nontoxic multi-color fluorescent substance. Fluorescent substance in biology exists two major shortcomings, one is that they are toxic and the other is that they are relatively monotonous, only emitting light of a single color. In response to this situation, we propose a new preparation method of multi-color, non-toxic fluorescent substance and study its fluorescence characteristics.

The Research on Preparation Methods of Sludge-Based Adsorbent and its Application in Water Treatment

2013 ◽  
Vol 798-799 ◽  
pp. 1166-1169 ◽  
Author(s):  
Kun Huang ◽  
Bing Xin Du
Keyword(s):  
Sustainable Development ◽  
Sewage Sludge ◽  
Preparation Method ◽  
Research Direction ◽  
Excess Sludge ◽  
Preparation Methods ◽  
Gas Treatment ◽  
Waste Gas ◽  
Waste Gas Treatment ◽  
Process Of Urbanization

The accelerated process of urbanization and industrialization leads to the increase of sewage sludge production. The reuse of excess sludge which meets the idea of sustainable development is aimed to develop it into resources. Preparation of sludge-based adsorbents with various functions provides a new way for sludge utilization as a resource in China. The preparation method of sludge-based adsorbents and its application in wastewater and waste gas treatment are introduced. Suggestions about the research direction of sludge-based adsorbents in the future are point out.

scholarly journals Effects of the preparation method on the structure and the visible-light photocatalytic activity of Ag2CrO4

2014 ◽  
Vol 5 ◽  
pp. 658-666 ◽  
Author(s):  
Difa Xu ◽  
Shaowen Cao ◽  
Jinfeng Zhang ◽  
Bei Cheng ◽  
Jiaguo Yu
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Environmental Remediation ◽  
Preparation Method ◽  
Blue Shift ◽  
Preparation Methods ◽  
Visible Light Photocatalytic Activity ◽  
The Comparative Study ◽  
Hydrothermal Methods ◽  
Visible Light Photocatalytic

Silver chromate (Ag2CrO4) photocatalysts are prepared by microemulsion, precipitation, and hydrothermal methods, in order to investigate the effect of preparation methods on the structure and the visible-light photocatalytic activity. It is found that the photocatalytic activity of the prepared Ag2CrO4was highly dependent on the preparation methods. The sample prepared by microemulsion method exhibits the highest photocatalytic efficiency on the degradation of methylene blue (MB) under visible-light irradiation. The enhanced photocatalytic activity could be ascribed to the smaller particle size, higher surface area, relatively stronger light absorption, and blue-shift absorption edge, which result in the adsorption of more MB molecules, a shorter diffusion process of more photogenerated excitons, and a stronger oxidation ability of the photogenerated holes. Considering the universalities of microemulsion, precipitation, and hydrothermal methods, this work may also provide a prototype for the comparative study of semiconductor based photocatalysis for water purification and environmental remediation.

scholarly journals The Potential of Benefiting Variation between the Same Species of Artemisia Herba-alba from Different Location in Northeast of Libya

2019 ◽  
pp. 1-6
Author(s):  
Rania. F. M. Ali ◽  
Ahlam K. Alaila ◽  
Gebreel. A. A. Aldaaiek
Keyword(s):  
Phenolic Compounds ◽  
Medicinal Plants ◽  
Essential Oils ◽  
Total Protein ◽  
Mineral Content ◽  
The Other ◽  
Mineral Analysis ◽  
Phenolic Contents

The medicinal plants (Artemisia herba-alba) were subjected to mineral analysis, total protein and the phenolic contents. Couple plants were collected from AL-Gabal AL-Akhder region in Northeast of Libya (Coastal and Desert) Artemisia herba-alba 1 Artemisia herba-alba 2 respectively during November (2018).  Results showed that mineral content found to vary significantly. Appreciable amounts of calcium Ca was recorded 84.930 ppm in Artemisia herba-alba 1 while 30 ppm in Artemisia herba-alba 2, potassium (K) was 43.3 and 27.6 ppm in Artemisia herba-alba 1 and Artemisia herba-alba 2 respectively. Meanwhile, Fe was recorded as 0.39, 0.52 ppm in Artemisia herba-alba1 and 2. Level of total protein was 9.95 and 7.79 (mg/g) in Artemisia herba-alba 1 and Artemisia herba-alba 2 respectively. Present study found that the phenolic compounds were determined in both plants with high levels. The available data indicate the two plants were found to contain Alkaloids, essential oils, flavonoids, glycosides, phenolic compounds, sterols/triterpenes, and tannins. However, sterols/ triterpenes and coumarins were found in herba-alba 1  significantly, while Alkaloids, flavonoids, and Saponins found highest in herba-alba 2 compared to herba-alba 1 on the other side the quantity of essential oils was higher in the herba-alba 2.

Synthesis of ZrO2 Nanotubes by Anodization of Zr Foil

2015 ◽  
Vol 799-800 ◽  
pp. 125-129
Author(s):  
Mary Donnabelle L. Balela ◽  
April Alexa S. Lagarde ◽  
Stephen Jann A. Tamayo ◽  
Nikko S. Villareal ◽  
Ann Marielle Parreno
Keyword(s):  
Aqueous Solution ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Surface Preparation ◽  
The Other ◽  
Preparation Methods ◽  
X Ray ◽  
Anodization Time ◽  
Other Hand ◽  
Scanning Electron

Zirconia (ZrO2) nanotubes were synthesized by anodization of zirconium (Zr) foil in NH4Fand (NH4)2SO4 aqueous solution. Different surface preparation methods (electropolishing and etching) were applied on the Zr foil prior to anodizaton. In addition, the anodization time and NH4F concentration were varied. The structure and morphologies of the nanotubes and their crystallinity were confirmed using scanning electron microscope and x-ray diffractometer, respectively. ZrO2 nanotubes with large diameters and thick walls were formed at lower NH4F concentration and longer anodization time. On the other hand, smaller nanotubes with thinner walls were produced when the NH4F concentration was increased. The synthesized nanotubes were predominantly tetragonal ZrO2 with small amounts of monoclinic ZrO2.

Effect of Preparation Method and Storage on Rifampin Concentration in Suspensions

1994 ◽  
Vol 28 (2) ◽  
pp. 182-185 ◽  
Author(s):  
Milap C. Nahata ◽  
Richard S. Morosco ◽  
Thomas F. Hipple
Keyword(s):  
Storage Time ◽  
Solution Method ◽  
Preparation Method ◽  
Hplc Method ◽  
Measured Concentration ◽  
Preparation Methods ◽  
Initial Concentration ◽  
Stability Indicating ◽  
The Mean ◽  
And Storage

OBJECTIVE: To determine the effect of four preparation methods and extended storage on rifampin concentration in extemporaneously prepared suspensions. DESIGN: Four preparation methods were used: mixing intravenous (iv) rifampin in syrup (A); manufacturer's recommended technique of mixing capsule (Rifadin) contents in syrup (B); triturating capsule contents in syrup into a paste and adding remaining syrup while mixing (C); and triturating capsule contents in syrup into a paste, adding syrup, retriturating the slurry, and adding remaining syrup while mixing (D). Samples were drawn from each of five bottles of each of the four preparations stored at 4 °C, immediately after mixing (day 0), and on days 7, 14, 28, 42, 56, 70, and 91 days during storage. Rifampin wes measured by a stability-indicating HPLC method. RESULTS: The measured mean concentrations of rifampin were nearly 100 percent of the initial concentration in the suspension prepared from iv rifampin solution (method A) during the first 56 days of storage. In contrast, the measured concentrations were substantially lower than expected in the suspensions prepared by methods B, C, and D. The mean rifampin concentrations in suspensions prepared by methods B, C, and D were only 14.5, 38.6, and 68 percent, respectively, of the initial concentration achieved by method A. The rifampin concentrations increased with storage time in suspensions prepared by methods B, C, and D. The mean rifampin concentration was lower than 90 percent during the first 14 days with methods B and C, and the first 7 days with method D. The highest mean concentrations were observed on day 42 with method B, and on day 28 with methods C and D. All methods yielded 90% of the labeled potency (10 mg/mL) on day 56. CONCLUSIONS: Our results showed that preparation method can influence the dispersion, and thus the measured concentration, of rifampin in aliquots of suspensions prepared from capsules and stored in plastic bottles. Suspensions prepared from capsules led to lower-than-expected rifampin concentrations; those prepared from iv rifampin did not. Rifampin was stable in each type of suspension for 56 days at 4 °C.

Analysis of the sample preparation methods based on piecewise variation coefficients of component mass fractions

2021 ◽  
pp. 15-19
Author(s):  
V. Z. Kozin ◽  
A. S. Komlev ◽  
E. V. Stupakova
Keyword(s):  
Sample Preparation ◽  
Relative Error ◽  
Preparation Method ◽  
Sampling Error ◽  
Theoretical Description ◽  
Random Errors ◽  
Copper Ore ◽  
Preparation Methods ◽  
Mass Fractions ◽  
Sample Preparation Methods

Sample preparation methods are usually developed following respective recommendations of the applicable sampling standards. Modern sampling theories allow designing and optimizing these methods. Random errors in sample preparation are calculated based on a theoretical description of the piecewise heterogeneity of the sample obtained using the formulas for the fundamental sampling error. The concept of a piecewise coefficient of variation is introduced and used to develop a formula for the relative error of the sample preparation method. Using a method compiled in accordance with GOST 14180-80 for copper ore as an example, the relative error is established for the preparation of an ore sample with the copper mass fraction of 1.3 %. It is shown that a change in the final preparation size from 0.1 to 0.08 mm affects the error only insignificantly, and sample size changes by stages allow designing a preparation method with the smallest error. It is advisable to analyze the method compiled and change its parameters on the basis of a structural assessment of the influence of individual preparation stages on the error. Sample preparation examples for copper and gold-bearing ore are used to demonstrate the analysis procedure and the parameter changes. Traditionally, the minimum sample masses are established for all stages based on the volumetric heterogeneity of the sample being tested and the size of the sample material. The minimum masses should be found depending on the grain size of the valuable mineral in the ore, the permissible relative error for the size reduction, and the material size for the sample reduced by a factor of 1.5 for nonferrous metal ores.

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