Effects of Chitosan Coating Structure and Changes during Storage on Their Egg Preservation Performance

To explore the influences of chitosan coating structure and structure changes during storage on egg preservation, eggs coated by chitosan solution for single time (CS1), two times (CS2), and three times (CS3) were prepared separately and stored with untreated eggs (CK1), eggs washed by water (CK2) and eggs treated by acetic acid solution (CK3) at 25 °C, 80% RH. The weight loss, Haugh unit, yolk index, albumen pH, eggshell morphologies and infrared (FTIR—Fourier Transform Infrared) spectra of all the samples were monitored. CS2 and CS3 presented the lowest weight loss, highest Haugh unit and yolk index, stabilized pH, and the highest thickness of chitosan coating layers (>2 μm) among all the groups, which extended egg shelf life for 20 days longer compared to CK1 and CK2. CS1 with very thin chitosan coating showed similar egg qualities with CK3, which are second only to CS2 and CS3. Furthermore, destructions were found on chitosan coatings during storage as revealed by the eggshell morphologies and FTIR spectra, which caused the quality deterioration of eggs. The results demonstrated that eggs with the thickest coating showed the best qualities during storage, while destructions on coating layers led to the quality drop of eggs.

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PENGARUH BIODEGRADASI DENGAN TEKNIK PENANAMAN TERHADAP PRODUK LATEKS KARET ALAM BERPENGISI TEPUNG KULIT PISANG YANG DIPUTIHKAN DENGAN HIDROGEN PEROKSIDA

Jurnal Teknik Kimia USU ◽

10.32734/jtk.v1i2.1411 ◽

2012 ◽

Vol 1 (2) ◽

pp. 11-15

Author(s):

Erick Kamil ◽

Emelya Khoesoema ◽

Hamidah Harahap

Keyword(s):

Weight Loss ◽

Fourier Transform ◽

Natural Rubber ◽

Natural Rubber Latex ◽

The Other ◽

Rubber Latex ◽

Soil Burial ◽

Loss Calculation ◽

Structure Changes ◽

Npk Fertilizer

Natural rubber latex products filled with bleached banana skin powder were identified by burying samples in soil. Soil burial was carried out by adding NPK fertilizer and without fertilizer. One of the tests which was carried out was weight loss calculation. Weight loss calculation showed that natural rubber latex products filled with bleached banana skin powder biodegraded faster than natural rubber latex products without filler. The addition of fertilizer also contributed to biodegradability of samples. The other test was FTIR (Fourier Transform Infrared Spectroscopy) test. The results of FTIR test showed there were structure changes in natural rubber latex which indicated natural rubber latex had been biodegraded.

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Development and Characterization of β- Tricalcium Phosphate Cements Containing Chitosan

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.309-311.845 ◽

2006 ◽

Vol 309-311 ◽

pp. 845-848 ◽

Cited By ~ 1

Author(s):

Marina S. Tonoli ◽

Claudinete V. Leal ◽

Cecília A.C. Zavaglia ◽

Marisa Masumi Beppu

Keyword(s):

Acetic Acid ◽

Calcium Phosphate ◽

Phosphoric Acid ◽

Acid Solution ◽

Acetic Acid Solution ◽

Chitosan Solution ◽

Phosphoric Acid Solution ◽

Mechanical Resistance ◽

Total Acid

Cements were prepared by mixing the calcium phosphate (β-TCP) with phosphoric acid solution (2.6M) and chitosan solution (2.5% in acetic acid solution) that was added in different proportions, ranging from 1 to 50% of total acid solution amount. Observations using SEM showed that the used of chitosan increased the interconnectivity of grains in the final cement, although the mechanical resistance to compression decreased from approximately 3 to 1 MPa. Probably the chitosan macromolecule is able to form a more interconnected net.

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Preparation of Coated Corrugated Box for Controlled-Release of Chlorine Dioxide and Its Application in Strawberry Preservation

Coatings ◽

10.3390/coatings10030242 ◽

2020 ◽

Vol 10 (3) ◽

pp. 242 ◽

Cited By ~ 1

Author(s):

Yuanyuan Li ◽

Dan Ren ◽

Dan Xu

Keyword(s):

Weight Loss ◽

Acetic Acid ◽

Water Vapor ◽

Chlorine Dioxide ◽

Room Temperature ◽

Fruits And Vegetables ◽

Acetic Acid Solution ◽

High Humidity ◽

Surface Color ◽

Inner Surface

Chlorine dioxide (ClO2) has received great attention as a nontoxic and efficient antimicrobial agent for the preservation of fresh fruits and vegetables. A novel two-layer coated corrugated box was developed to release gaseous ClO2 under the trigger of moisture in this study. The inner surface of the box was firstly coated with a mixture of polyvinyl alcohol-NaClO2-diatomite and then with chitosan acetic acid solution. Results showed that ClO2 was successfully released under high humidity due to the reaction of NaClO2, water vapor and acid. The concentration of released ClO2 increased with the increasing NaClO2 content in the coating, while the addition of diatomite stabilized and extended the release. To evaluate the preservation effect, strawberries were packed in the coated box and stored at room temperature. Compared with the control, the decay rate and weight loss of the strawberries packed in the coated box (9 g/L NaClO2) were reduced up to 21.88% and 6.84%, respectively. The surface color, firmness and nutrients content were also better maintained. Therefore, this coated corrugated box with the capability to release ClO2 under the trigger of moisture has great potential to be applied as an antimicrobial packaging for fresh fruits and vegetables.

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Study on the Effect of Prawn (Machrobrachuim rosenbergii) Chitosan Coating on Peeled Shallot (Allium ascalonicum)

Current Research in Nutrition and Food Science Journal ◽

10.12944/crnfsj.7.3.31 ◽

2019 ◽

Vol 7 (3) ◽

pp. 927-935 ◽

Cited By ~ 1

Author(s):

G. Nagamaniammai ◽

M. Chithra ◽

M. Udhaya Ganga

Keyword(s):

Weight Loss ◽

Shelf Life ◽

Fruits And Vegetables ◽

Acetic Acid Solution ◽

Calcium Content ◽

Tween 80 ◽

Inhibitory Effect ◽

Chitosan Coating ◽

Significant Difference ◽

Oregano Oil

Shallot (Allium ascalonicum) is the most important commercial vegetable crop grown in India. Shallot peeling is tough and consumes time. The availability of peeled shallots in markets will reduce the time consumed on peeling shallots for cooking. But peeled shallot does not have longer shelf life. Edible coating for peeled shallots can reduce spoilage and can inhibit microbial growth too. The Chitosan coating of shallots was based on the dipping method of coating fruits and vegetables. The study on coating chitosan in shallots and different parameters with varying composition were analyzed. The physio-chemical parameters like protein content, carbohydrate content, calcium content and total phenols content and weight loss shows that there is a significant difference with coated and uncoated Shallot stored at 4C for a period of 15 days. The microbial studies and physical characteristic studies show that number of microbes and decay is significantly less for coated onion samples compared with uncoated samples respectively. The inhibitory effect of chitosan produced from prawn shell against fungi was studied by adding 0.2% oregano oil, 0.4% of Tween 80 (polysorbate 80) and 0.7% of Glycerol. The Zone of inhibition was obtained has which were found to be 3.1cm, 1.5cm and 2.9cm for Oregano (Or), Thyme (Th) and Mint (M) leaves. Addition of 0.1% Tween 80 to 1.5 % chitosan in acetic acid solution improved the effectiveness of coating on the Shallot skin. The above study revealed that Chitosan coatings were in effect on successful quality improvement and extending shelf life of Shallot by delayed ripening, lowered respiration rate, regulated gas exchange, decrease in transpiration rate, retaining fruit firmness, reduction in weight loss etc.

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Some Approaches to Viscometric Study of Chitosan in Acetic Acid Solution

Chemistry & Chemical Technology ◽

10.23939/chcht10.02.135 ◽

2016 ◽

Vol 10 (2) ◽

pp. 135-139 ◽

Cited By ~ 3

Author(s):

Valentina Chernova ◽

◽

Angela Shurshina ◽

Elena Kulish ◽

Gennady Zaikov ◽

...

Keyword(s):

Acetic Acid ◽

Acid Solution ◽

Intrinsic Viscosity ◽

Acetic Acid Solution ◽

Conformational State ◽

Macromolecular Coil ◽

Degree Of Swelling ◽

Current Value ◽

Viscometric Study

Some ways of estimating the values of the intrinsic viscosity of chitosan were analyzed. It was shown that the method of Irzhak and Baranov for estimating the current value of the intrinsic viscosity allows to adequately estimates the conformational state of the macromolecular coil and its degree of swelling.

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HPLC-UV Method for Determination of Famotidine from Pharmaceutical Products

Revista de Chimie ◽

10.37358/rc.18.2.6093 ◽

2018 ◽

Vol 69 (2) ◽

pp. 297-299

Author(s):

Adriana Nita ◽

Delia Mirela Tit ◽

Lucian Copolovici ◽

Carmen Elena Melinte (Frunzulica) ◽

Dana Maria Copolovici ◽

...

Keyword(s):

Acetic Acid ◽

Quantitative Analysis ◽

Linear Response ◽

Mobile Phase ◽

Acetic Acid Solution ◽

Pharmaceutical Products ◽

Quantification Limit ◽

Validation Parameters ◽

Hplc Analyses

The aim of this study was to develop and validate a rapid, accurate, and exact method for the quantitative determination of famotidine in pharmaceutical products. The HPLC analyses were performed by using a mobile phase containing methanol:1% acetic acid solution=30:7 (v/v), at a flow rate of 0.4 mL/min.The total time of the method was 10 min, and the retention time of famotidine was 4.16 min. The detection was evaluated at l=267 nm. The method has been validated by using different validation parameters. The linear response of the detector for famotidine peak area was observed at concentrations ranging from 0.1 to 0.0001 mg mL-1 , resulting in a correlation coefficient of 0.99998. The values of the detection limit and of the quantification limit are 0.00048 mg mL-1 and 0.00148 mg mL-1, respectively. The method proposed allowed accurate (with a relative error of less than 2%) and precise (RSD values less than 2.0%) determination of famotidine content in pharmaceutical products and can be used for its rapid quantitative analysis.

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Study on the initiation mechanism upon oxidation of methylaromatic hydrocarbons in presence of cobalt acetate and sodium bromide in acetic acid solution

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19752084 ◽

1975 ◽

Vol 40 (7) ◽

pp. 2084-2092 ◽

Cited By ~ 2

Author(s):

S. Ivanov ◽

M. Hinkova

Keyword(s):

Acetic Acid ◽

Acid Solution ◽

Acetic Acid Solution ◽

Cobalt Acetate ◽

Sodium Bromide ◽

Initiation Mechanism

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Durability of Red Mud Based Geopolymer Paste in Acid Solutions

Materials Science Forum ◽

10.4028/www.scientific.net/msf.866.99 ◽

2016 ◽

Vol 866 ◽

pp. 99-105 ◽

Cited By ~ 3

Author(s):

Smita Singh ◽

M.U. Aswath ◽

R.V. Ranganath

Keyword(s):

Mechanical Properties ◽

Acetic Acid ◽

Fly Ash ◽

Red Mud ◽

Acetic Acid Solution ◽

Strength Loss ◽

Acid Solutions ◽

Test Results ◽

Acid Attack ◽

Geopolymer Paste

The present investigation is on the effect of red mud on the mechanical properties and durability of the geopolymer paste in sulphuric and acetic acid solution. Red mud and fly ash were used to form the geopolymer paste along with the alkalies. The variation of red mud in the paste composition was from 0% to 90%. Cylindrical shaped specimens of 1 inch diameter and 1 inch height were prepared. The specimens were immersed in 5% sulphuric acid and 5% acetic acid for 1, 7, 14, 28, 56 and 84 days and tested for weight loss, visual deformation, strength loss and colour of the solvent, based on the procedure specified by ASTM C 267 – 01. SEM/EDX Tests were performed on the geopolymer specimens. Test results show that initially, the strength of the geopolymer increased upon the addition of red mud. The strength was maximum when the percentage of red mud was 30%. The maximum strength obtained was 38 MPa for the paste containing 30% red mud using 10M alkali solution as against 31.69 MPa, when only fly ash was used. Geopolymer paste containing 30% and 50% red mud showed better resistance to acid attack. The strength loss was minimum for the samples containing 30% red mud in both inorganic and organic acid i.e. sulphuric and acetic acid.

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