Zarina Zakaria, Assoc. Prof. Dr.
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/39201
This page provides access to scholarly publications by UniMAP Faculty members and researchers.2024-03-29T07:17:59ZTotal Nitorgen Content from Earthworm (Eisenia Foetida) Using The Kjeldahl Method
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/68509
Total Nitorgen Content from Earthworm (Eisenia Foetida) Using The Kjeldahl Method
Zarina, Zakaria; Alina Rahayu, Mohamed; Noor Hasyierah, Mohd Salleh; Siti Nursheela, Abu Mansor
In the fish aquaculture management, fish feed is identified as a major problem. The high cost and scarcity of fishmeal in formulated feeds have led to the use of other protein sources such as earthworms and animal by-product. Earthworm is an alternative source of protein to replace the fish meal in the fish feed formulation. In this study, total nitrogen content in the earthworm powder is determined using the Kjeldahl method by employing the statistical software, Full Factorial Design (FFD) which could provide the significant information about the studied parameters. The parameters are, the digestion time (min) and the volume of sulfuric acid (H2SO4) (ml). From the analysis of variance (ANOVA), the volume of H2SO4 and the interaction between digestion time and the volume of H2SO4 are found to be important parameters in the nitrogen determination process via the Kjeldahl method. The highest nitrogen content obtained was 12.23%, when using 15 ml H2SO4 and 60 mins of digestion time. The value of R2 is 0.9986, which shows that the selected parameters (the digestion time and the volume of H2SO4) and its corresponding levels are highly correlated to the percentage nitrogen content in earthworm powder using the Kjeldahl method.
Link to publisher's homepage at https://journals.iium.edu.my/
2013-01-01T00:00:00ZBio-Milk Coagulant from Streblus asper
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/37768
Bio-Milk Coagulant from Streblus asper
Lee, Yen Fong; choo, Yen Mei; Rozaini, Abdullah; Zarina, Zakaria, Dr.; Huzairy, Hassan
Kesinai or scientifically known as Streblus asper (Family: Moraceae) is a small tree found in Malaysia, Philippines, China and India and also other tropical and sub-tropical countries. It has been reported that kesinai used for several medicinal, food, detergent, leather, pharmaceutical purposes and different parts of the plant can be used for various applications. In Malaysia, the leaf extract of this plant is determined to contain a milk coagulating protease which would be a potential rennet substitute.
Macau International Innovation & Invention Expo 2013 (IIEX), 28th June - 30th June 2013 organized by Macao Innnovation & Invention Association at Macau Fisherman Wharf Exhibition Centre, China.
2013-06-28T00:00:00ZDetermination of flavonoids in Citrus grandis (Pomelo) peels and their inhibition activity on lipid peroxidation in fish tissue
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/35740
Determination of flavonoids in Citrus grandis (Pomelo) peels and their inhibition activity on lipid peroxidation in fish tissue
Zarina, Zakaria, Dr.; S., Y. Tan
The peels of pomelo contribute 30% of the fruit weight and yet it has been dump without recognizing the possible nutritional value of the peels. Study has been carried out to identify flavonoid content of the peels and analysed the activity of the flavonoid towards inhibition of lipid peroxidation. Optimization of flavonoid extraction was conducted using aqueous solvent (methanol and ethanol), extraction time (1-3 h) and extraction temperature (50°C-80°) via water bath extraction. The total content of flavonoids was quantitatively determined by using coloration methods with chromogenic system of NaNO2-Al (NO3)3-NaOH and and it was found that the extraction at 65°C for 2 h in aqueous ethanol was the optimized condition for maximum flavonoids i.e. 190.42mg/L. A spectrophometric analysis was performed to evaluate flavonoid activity towards lipid peroxidation in the fish tissue. There was reduction in Peroxide value (PV) indicated the inhibition of lipid peroxidation in fish treated with pomelo peel as evidence of concurrency of positive flavonoid activity.
Link to publisher's homepage at http://www.food.upm.edu.my/
2013-01-01T00:00:00ZProtein solubility behaviour of fresh and frozen chicken meat in slaughtering and non slaughtering condition
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/35054
Protein solubility behaviour of fresh and frozen chicken meat in slaughtering and non slaughtering condition
Nahar, M. K.; Zarina, Zakaria, Dr.; Uda, Hashim, Prof. Dr.
This work was investigated the protein solubility properties of meat from chicken in different body part. The effects of fresh and freezing condition were studied on the protein solubility as a functional property of slaughter and non slaughtering chicken meat. Solubility of proteins was significantly reduced for slaughtering fresh meat and in contrast, non slaughtering fresh meat shows the higher protein solubility. On the other hand, frozen storage meat showed the difference amount of protein solubility between slaughtering and non slaughtering condition meat. Freezing condition also showed that the different solubility of different body part meat. The protein solubility of some parts was significantly increased and some were decreased between the slaughtering and non slaughtering condition.
Link to publisher's homepage at http://www.ifrj.upm.edu.my/
2014-01-01T00:00:00Z