Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userDetermination of Copper and Zinc levels in some spices in local market
تحديد تراكيز النحاس و التوتياء في بعض أنواع البهارات في السوق المحلية
1494
0 12
0
(
0
)
Added by
Tishreen University ورقة بحثية
Publication date
2013
fields
Food Sciences
and research's language is
العربية
Created by
Shamra Editor
Ask ChatGPT about the research
قدرت كمية عنصرين من العناصر الثقيلة (النحاس و التوتياء) في بعض أنواع البهارات شائعة الاستعمال و المنتشرة في بعض الأسواق المحلية السورية باستخدم جهاز الامتصاص الذري. بينت الدراسة وجود فروق في تراكيز هذين العنصرين تبعاً لأنواع البهارات المختلفة المدروسة. تراوح تركيز النحاس في البهارات من تراكيز صغيرة (0.059) إلى تراكيز عالية وصلت إلى 0.668 mg/kg. بينما وصل الحد الأعظمي لتركيز التوتياء في عيّنات البهارات المدروسة إلى 2.523mg/kg. كانت تراكيز النحاس في معظم العيّنات أقل من الحد الأعظمي المسموح به كما أظهرت النتائج وجود التوتياء بنسب أقل بكثير من النسب المسموح بها في المواصفات العالمية و المحلية.
The concentrations of Copper (Cu) and Zinc (Zn) in samples of some spices available at some local markets in Syria were determined, after nitric digestion, using Atomic Absorption Spectrometry. The study showed differences in metal concentrations according to the edible part. Studied heavy metals were present in all samples at different levels. The concentration of Copper (Cu) and Zinc varied from trace to higher concentration. The maximum level of Copper (Cu) in the spices samples was 0.668 mg/kg. The maximum level of Zinc (Zn) in the spices samples was 2.523mg/kg. The analytical results obtained for the heavy metals indicate that the Copper and Zinc were present in all samples at concentration well below the acceptable daily intake recommended by the World Health Organization.
References used
ABOU, A.A.; and %5BAuthor%5D"ABOU, D.M. Heavy metals in Egyptian spices and medicinal plants and the effect of processing on their levels. Journal of Agriclture and Food Chemistry, Vol. 48, N° 6, 2000, 2300 – 2304
AGORAMOORTHY, G.; FU-AN, C.; and MINNA, J.H. Threat of heavy metal pollution in halophytic and mangrove plants of Tamil Nadu, India. Environmental Pollution Vol. 155, 2008, 320 – 326
AKERELE, O. Nature’s medicinal bounty: don’t throw it away. World Health Forum, 1993, pp. 390 – 395
rate research
Read More
The concentrations of copper (Cu) and zinc (Zn) in samples of some cereals available at
local markets in Syria weredetermined, after nitric digestion, using Atomic Absorption
Spectrometry. The study showed that the heavy metals were present in all
samples at different
levels. The concentration of heavy metals varied from trace to higher concentration.
The maximum level of copper (Cu) in the cereal samples was 0.426 mg kg-1 on dry
weight basis, where the maximum level of zinc (Zn) in the cereal samples was 2.325mg mg kg-
1 on dry weight basis. The analytical results obtained for the heavy metals indicate that the
copper and zinc were present in all samples at concentration well below the acceptable
concentration recommended by the World Health Organization.
Formaldehyde is classified by the World Health Organization (International Agency
for Research on Cancer) as a carcinogen in Group 1. The upper limit allowed for use in
cosmetic products as a preservative has to not exceed 0.2%. This study aims to
detect and
determine formaldehyde level in some cosmetic products available in the local market
using acetyl acetone method. Formaldehyde was detected in 77% of the studied cosmetic
products (49 samples) despite the fact that most of them were not labeled formaldehyde or
formaldehyde donor preservatives (about 70%). The amount of formaldehyde in keratin
samples were higher than the allowed limit (0.34% -11.73%) except one sample 0.18%. pH
decrease and temperature increase of keratin samples led to an increase of formaldehyde
level as a result of its release from preservatives.
Grapefruit (Citrus Paradisi) is one of many citrus species that are widely cultivated
in the west Mediterranean coast of Syria, the fruit is rich in flavonoid (a natural medical
compounds), naringin considered the major flavonoid in Grapefruit.
Pr
evious studies have documented a wide range of biological effects and therapeutic
properties that belong to naringin; therefore, it became a raw material in pharmaceutical
industries.
It was the aim of this study is to have naringin extracted from grapefruit by an
economic method, and assign its levels, in preparation for industrial investment.
Two types (red blush) and (march) where collected from three districts in Syrian
coast, they were collected at the beginning of harvest season and at the end of it, fruits
grown in sun light and those grown in shade were collected tow, so that healthy fruit and
partly infected.
A water alkaline method was applied to extract naringin, then a quantitive and
qualitative determination was made to the resulting compound.
Results revealed that naringin content in March grapefruit at the beginning of the
harvest season was 45.53 g/kg and 44.8 g/kg in Red Blush grapefruit so on at the end of the
harvest season it was 10.29 g/kg in March and 9.32 g/kg in Red Rlush.
We have concluded that that Syrian Grapefruit have sufficient naringin cotent for
economical investment, and that water alkaline method is a suitable economic method to
extract naringin from grapefruit white peels.
Spices are becoming increasingly important world-wide due to their effectiveness as natural antibiotics, the thing that makes the world nowadays tend to use spices instead of chemical drugs. However, this doesn’t mean they are free of some dangerous
pathogens such as Klebsiella spp. which can lead to a wide range of illnesses, notably pneumonia, urinary tract infections (UTIs), and bacteremia. Although we don’t know the natural habitat of this bacterium we find that it thrives in herbs and spices, concluding thus that plants may be its natural habitat.
The primary isolation of this bacterium was based first on its growth on general media and then isolation on selective media. Colonies of the microorganisms were counted on different media then Klebsiella was isolated from a selective media. The isolated colonies of Klebsiella were circular, dome-shaped, 3-4 mm in diameter, with mucoid sticky edges, and surrounded by capsule. After this we chose the typical colony and identified it using Polymerase chain reaction PCR and biochemical tests. Our results showed that 32% of examined specimen contained Klebsiella spp.
This study was conducted to determine some heavy minerals in different types of
canned meat sold in the domestic market. Most of those cans were imported and processed
in different countries and they have different brands. The chosen samples after
ashing were
prepared by using concentrated extra pure Nitric and Hydrochloric acids .The ratios of the
minerals )pb , Cd , Ni , Zn , Cu , Mn , Fe ( were determined by Atomic Absorption
Spectrophotometry , and the content was expressed as (p.p.m) wet weight. It was observed
that the levels of Lead, Iron, and Cadimum, in all different samples were higher than the
permitted limlts according to the Syrian Standards . The Cu level in both , tuna and sardine
was within the permitted limits, but it was higher in the chicken Lunchoen. The level of
Zinc was within the permitted limits according to the Syrian standards. The highest ratio of
Lead was observed in the sardine imported from Morocco which was 8.765 p.p.m and in
the Lunchoen processed in Syria which was 5.18 p.p.m ,and both ratios are much higher
than the permitted limits according to the Syrian Standards.
suggested questions
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
