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Open Access Article
1 - Metal ions binding study on human growth hormone by isothermal titration calorimetric method
A.A. Saboury MS. Atri -
Open Access Article
2 - Thermodynamic of Interaction between Some Water-Soluble Porphyrins and DNA by Titration Microcalorimetry
M. Keshavarz K. Zare M. Akbarzadeh M.R khoshchehreh A.F.B Mahdavi -
Open Access Article
3 - The pH effect on complexation of Alkali metal cation by p-sulfonatocalix (4) arene in aqueous solution
K. Zare N. Osouleddini -
Open Access Article
4 - Increasing the shelf life of Iranian caviar by nano silver packaging basis TIO2 and determination of residue by titration
S. Moradi, A. Motallebi, A. Anvar, H. Ahari, H. Beheshty Shirazi, N. Rokni, نکیسا Sohrabi Haghdoost, A. Mokhtari, S. Vahid, H. Rahmannya, نیوشا Alimohammadi,Nano-packaging is among the novel packaging technologies used for increasing the quality andsafety of food materials. Nano-coating used in Nano-packaging is an enormous revolution in theexport of spoilable products.In this research, 38 caviar packs (5 gr) including 4 na MoreNano-packaging is among the novel packaging technologies used for increasing the quality andsafety of food materials. Nano-coating used in Nano-packaging is an enormous revolution in theexport of spoilable products.In this research, 38 caviar packs (5 gr) including 4 nano-freecoating packs, 4 nano-silver based 6000 ppm coating packs, 4 nano-silver based 5000 ppmcoating packs, 4 nano-silver based 4000 ppm coating packs, 4 nano-silver based 2000 ppmcoating packs, and 4 nano-silver based 1000 ppm coating packs were dually inspected forbacteria and fungi. After microbial examinations and spread preparation and gram coloring anddetecting the gram bacteria in terms of morphology, further inspection for detecting the bacteriaand fungi in specific environments was attempted. After a 24-hour inspection, Staphylococcusaureus and Escherichia coli and Aspergillus flavus and Penicillium were detected in nano-freecoated samples. However, there has been a considerable decrease in fungi and bacterial growthin 5000 and 6000 ppm coatings. Eventually, the silver quantity in caviar packs were measuredby means of titration method and by applying tirazol and concentrated sulphuric acid, and zerosilver leftover content was detected. Moreover, 5000 and 6000 ppm coatings with P<0.05considerably decreased fungi and bacterial growth.As a conclusion, with respect to the achieved results and based on the fact that there is nopenetration of nano particles into caviar, the implemented technology can be used to increase thepreservation of valuable products and enhance the export industry. Manuscript profile -
Open Access Article
5 - Quantitative Changes in Ascorbic Acid and Chlorophyll Contents of Parsley (Petroselinum crispum) and Dill (Anethum graveolens) Harvested in Three Consecutive Months of Spring
F. Mirmohammadmakki M. Gharachorloo M. Ghavami V. Abdossi R. Azizinezhad -
Open Access Article
6 - Interaction of Human Serum Albumin with Ethyl 2-[2-(dimethylamino)-4-(4-nitrophenyl)-1,3-thiazole-5-yl]-2-oxoacetate as a Synthesized Ligand
Mahboube Eslami Moghadam Maryam Saidifar Faramarz Rostami-Charati Zinatossadat Hossaini Maryam Ghadamgahi -
Open Access Article
7 - Evaluation of sodium hydrosulfite residue in sugar crop in Zanjan province and investigation the new alternative method for determination
مهران Mohseni A.A Zamani کوروش Kamali عادل Mirza Alizadeh Sodium hydrosulfite/blanket is used as a decolorizing agent for the bleaching of produced sugar in the sugar industry. Due to sensitivity of using this chemical substance with defined allowed range in sugar product, the sensitive and exact method of voltamm More Sodium hydrosulfite/blanket is used as a decolorizing agent for the bleaching of produced sugar in the sugar industry. Due to sensitivity of using this chemical substance with defined allowed range in sugar product, the sensitive and exact method of voltammetry/polarography was used to measure the residual blanket in this product and moreover, its results were compared with titration method as a common method for measurement of this substance in reference laboratories. Among the active sugar plants in Zanjan province, three different samples of loaf sugar batch were selected from each production unit based on sampling method of Standard and Industrial Research of Iran and all samples were evaluated using polarography 797 VA Computrace. Then, some of the samples evaluated by the polarography method were also checked with titration method and the results of the two methods were compared with each other. Statistical analysis of obtained data from polarography method shows that various sugar factories have different average sugar content values in blanket residual. Comparative system shows that titration method gives a more than usual response to the amount of blanket residual. Polarography method shows that the dithionite content in the samples ranged from <1.40 to 13.24 ppm. However, in 6 percent of obtained samples from different plants, amount of blanket is more than allowable maximum (10 ppm). Comparing the results obtained from assessment of blanket residual amount in polarography method with titration method, shows significant differences between methods. Manuscript profile -
Open Access Article
8 - Investigation of buffering capacity of some buffer additives and an optimized buffer and its effect on gas production parameters of diets with different concentrate levels
Vahid Shahsanam Saeed Sobhanirad Kamran Reza Yazdi Parham Moslehifar In this study, the buffering resistance pattern of sodium bicarbonate, sodium sesquicarbonate, magnesium oxide, magnesium carbonate, sodium bentonite, and zeolite were statistically compared by plotting the titration curve and comparing the slope of the curves. Ac More In this study, the buffering resistance pattern of sodium bicarbonate, sodium sesquicarbonate, magnesium oxide, magnesium carbonate, sodium bentonite, and zeolite were statistically compared by plotting the titration curve and comparing the slope of the curves. According to the results of the buffer capacity, raw materials and their percentages were determined to produce the optimized multi-component buffer. The produced buffer acid-pH curve slope was compared with other slopes. No significant difference was observed in the slope of the optimized buffer with sodium bicarbonate (p <0.05). To ensure optimal buffer performance under ruminal conditions, experimental diets of low concentrate diet without buffer additive (CF), high concentrate diet without buffer additive (CC), low concentrate diet + 1% sodium bicarbonate (NF), high concentrate diet + 1% sodium bicarbonate (NC), low concentrate diet + 1% optimized buffer (BF) and high concentrate diet + 1% optimized buffer (BC), were examined with gas production test at 2, 4, 6, 8, 12 24, 48, 72 and 96 after incubation in ruminal fluid. The use of buffer additives has positive effects on maintaining acid-base balance in the rumen and thus improving the ecology of rumen microorganisms, which was accompanied by a significant increase in gas production (p <0.05). The use of buffer supplements will improve the fermentation process and can significantly increase the digestibility of organic matter and feed metabolizable energy (p <0.05). In addition, the results showed that the optimized buffer has a similar function to sodium bicarbonate and can be used as a suitable alternative. Manuscript profile