COMPARATIVE STUDY OF HONEY COLLECTED FROM DIFFERENT FLORA OF ALGERIA

The aim of the present study was to evaluate the physical and chemical properties of five Algerian unifloral types of honey. Several physical parameters of honey, such as pH, moisture content, electrical conductivity, total dissolved solids, color intensity and total sugar content, were measured. The mean pH, moisture content, EC and water insoluble solids of Algerian honey were 4.41± 0.58, 15.3 ± 1.5%, 0.324± 0.116 mS/cm and 0.141± 0.065%, respectively. The mean color was 81 ± 72 mm Pfund. The majority of honey samples test results (moisture content, electric conductivity and acidity) levels were within the acceptable range of world honey standards

CHEMICAL COMPOSITION AND ANTIOXIDANT ACTIVITY OF APIS MELLIFERA BEE POLLEN FROM NORTHWEST ALGERIA

<p>The aim of this study was to assess the nutritional compositionand antioxidant activity of bee pollen produced in the North western region of Algeria.The content of total phenolic compounds,flavonoids, and antioxidant activity using the molybdate ion reductionmethod were determined. The meancontents of phenolic compounds and total flavonoids were 30.46 ± 8.22 mgof GAE.g^–1 pollen and 8.92 ± 5.5 mg of RE.g^–1 pollen, respectively. Highantioxidant activities were found for the molybdate ion reductionmethod, with values that ranged from 71.95 to 101.5μg of GAE.g^–1 pollen. The bee pollen ofBoufarikshowed high antioxidant activity probably due to the high contentof phenolic compounds present in pollen.</p

STUDY OF ANTIOXIDANT CAPACITY OF DIFFERENT PARTS OF TWO SOUTH ALGERIAN EGGPLANT CULTIVARS

In this study the antioxidant capacity of ethanolic EE and water WE extracts from different parts (calyx, peel, and pulp) of eggplant (Solanum melongena L) were evaluated using cyclic voltammetry. The antioxidant capacity of different parts of eggplant was measured using ascorbic acid equivalent antioxidant capacity assays. The peel extracts of both dark purple and white samples showed the highest antioxidant capacity (66.78 and 75.62 mg/g) followed by pulp (16.54 and 30.56 mg/g), and calyx (14.82 and 21.27 mg/g). These results indicate that antioxidant capacity of eggplant varied by parts and solvents

STUDY OF ANTIOXIDANT CAPACITY OF DIFFERENT PARTS OF TWO SOUTH ALGERIAN EGGPLANT CULTIVARS

In this study the antioxidant capacity of ethanolic EE and water WE extracts from different parts (calyx, peel, and pulp) of eggplant (Solanum melongena L) were evaluated using cyclic voltammetry. The antioxidant capacity of different parts of eggplant was measured using ascorbic acid equivalent antioxidant capacity assays. The peel extracts of both dark purple and white samples showed the highest antioxidant capacity (66.78 and 75.62 mg/g) followed by pulp (16.54 and 30.56 mg/g), and calyx (14.82 and 21.27 mg/g). These results indicate that antioxidant capacity of eggplant varied by parts and solvents

SQUARE WAVE VOLTAMMETRIC DETERMINATION OF LEAD IN COMMERCIAL KOHL USING A GLASSY CARBON ELECTRODE

A simple sensitive square wave voltammetric method for the determination of lead contamination of several kohl samples purchased from Algeria retail stores was developed using glassy carbon electrode. The peak current response of 5 standards aqueous solution of lead in NaNO₃ as supporting electrolyte was observed showing a linear calibration curve in the concentration range of 4×10^-3 – 2.5×10^-4mol/l of lead. Over this concentration range, the equation obtained from the linear calibration graph for lead is <em>Y</em> = 0.00068 + 0.0093<em>x</em> with a correlation coefficient of r² = 0.987. Following this step, the potential of an aqueous solution of 12 kohl samples containing 2 M nitric acid solution as supporting electrolyte is then swept in the same range of potential (-400 to -700 mV). The amount of lead is then deduced using the linear calibration graph for lead. The results showed up to 52.14% of lead present in kohl, this concentration was over the safe limits of lead set by the world health organization standards. However; only five commercial samples of kohl tested contained less than 0.001% lead. Complete recovery of lead from the kohl was obtained by simple nitric acid digestion

Clustering and Discernment of Bee Pollen Using an Image Analysis System

In this paper, we suggest a framework for multi-focal image classification and identification, the methodology being demonstrated on microscope pollen images (image processing and classification techniques). The framework is intended to be generic and based on a brute force-like approach aimed to be efficient not only on any kind, and any number, of pollen images (regardless of the pollen type), but also on any kind of multi-focal images. Both stages of the framework's pipeline are planned to be used in an automated Fashion. First, the optimum focus is chosen using the absolute gradient method. Then, pollen grains are collected using a coarse-to-fine method involving both clustering and morphological techniques. Finally, features are extracted and selected using a generalized method, and their classification is checked using hierarchical cluster analysis (HCA). Our findings indicate that HCA meets the demands for automatic pollen detection making it an alternative method for research concerning pollen