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Plant fibrous suspensions require electrostatically cationic polymers to provide proper and strong structures during papermaking. The charge bearing naturally and synthetically polymers (Polyelectrolytes), are considered as the most chemicals used in cellulosic products mills, due to improvement in the fibrous suspension and network properties. For this, cationic acrylamide polymer (CPAM) and anionic nano cellulose (ANC) were added individually and in combination forms into the fibrous suspension recycled from brown packaging papers. Compared to the blank sample without any the polymeric additive, the polymeric contained suspensions and networks revealed improvements in fibrous suspension properties; i.e., retention, freeness and the solid materials loss during the network formation; and in the fibrous dried network, include density, tensile and burst strengths. Individually application of each CPAM and ANC increased the suspension retention (productivity) as 8% and 2%, resp. Fibrous suspension freeness and loss materials content continuously increased and decreased up to 47%, respectively that could provide significant technologically and economically benefits. Paper density (+5%), tensile (+17%) and burst (+27%) properties improved drastically compared to the blank. But, tear strength of fibrous network decreased (-4%) which could be attributed to the network higher fines contents and retention, originated from the acrylamide polyelectrolyte flocculation effect. Individually application of ANC also enhanced suspension retention, network density, tensile and burst strengths and declined network tear strength with lesser suspension freeness and loss. Anionic nature, high specific surface area and huge hydrogen bonding potential of ANC are the main reasons of the obtained results. ANC post addition to CPAM contained suspension resulted in tear reduction, but higher suspension retention and freeness, together with higher density, tensile and burst strength of cellulosic network. 

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The most important post harvesting factors that limiting grape berries after post harvesting are water losing and fungal decay. In this study, effect of titanium dioxide (TiO₂) and soy protein isolate edible coating against postharvest decay and increasing the storage life of table grape cultivar was investigated. Uniform clusters with no disease and physical damage were packed with coated and uncoated (control) TiO₂ nanoparticles. Then clusters were maintained for 31 days in cold storage at 0 ± 1 °C and RH 90 ± 5%. Grape berries abscission rate, total soluble solids (TSS), titratable acidity (TA), total phenolic content, color and clarity of grape berries, pH, antioxidant activity and total sugar characteristics were measured at intervals 6 days. The statistical analysis of results showed that the TiO₂ nanoparticles treatment had significant effects in cluster and grape berries weight losing, fungal infection, TA, total phenol content and coefficient of ripening. This treatment had best flavor, quality, appearance and marketability compared with the samples without TiO₂ nanoparticles treatment. In addition, the samples that treated with TiO₂ nanoparticles showed higher TSS, TA, antioxidant activity, total sugar and total phenolic content. In the present study, two varieties of grapes treated with TiO₂ nanoparticles in the comparison of control samples had higher quality at the end of the storage period.

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Today, consumption of milk and its products is one of the signs of development of human societies. Milk is a healthy, nutritious, delicious and thirsty drink that is consumed by a large group of people, especially children. Therefore, the aim of this study was using grape syrup as a flavoring in probiotic milk containing Bacillus coagulants and investigating effects of grape syrup on physicochemical and microbial properties of probiotic milk. For this purpose, two quantitative factors including grape syrup concentrations (0.17, 1, 3, 5 and 5.83 %) and storage time (0.96, 2, 4.5, 7 and 8.04 days) in five levels were evaluated by using a central composite design. The results showed that different concentrations of grape syrup and storage time on pH, acidity, dry matter, fat and viability of B. coagulation of probiotic flavored milk were significant (P<0.05). The optimum condition was obtained based on maximum pH and viability of B. coagulation and minimum acidity. The optimum condition was 1% grape syrup and 2 days’ storage time, which its total desirability was 95%.

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Background and Aim:  According to the widespread epidemic of the COVID-19 around the world and the irreparable damage in all aspects of human life, surveying coping methods with this epidemic is one of the research priorities of societies. The aim of this study was to find the factors that predict the severity of the disease and the resulting death.
Methods: This descriptive-analytical study was performed on patients with COVID19 admitted to Bu-Ali Sina hospital in Qazvin in March 2020. Epidemiological, clinical, laboratory, and radiological characteristics of patients was collected. Data were analyzed by independent t-test and Mann-Whitney U test (for normally and non-normally distributed quantitative variables, respectively) and chi-squared (for qualitative variables) on SPSS version 22. P<0.05 was considered significant.
Results: The study population included 119 admitted COVID-19 patients. 94 patients recovered and 25 patients died. The deceased patients were significantly older than recovered patients (P=0.0007).  The frequency of smoking in our study was 5.4% of patients. The deceased patients had higher lymphopenia (P=0.015), neutrophil number (P=0.009), blood urea nitrogen (P=0.012) and creatinine (P=0.032) were significantly higher and blood oxygen saturation (P=0.001) was significantly lower in deceased patients than those who recovered.
Conclusion: Percentages of smokers in hospitalized patients with COVID-19 disease was significantly lower than general population. If COVID-19 patients are in the high-risk group, including older people having sever hypoxia, lymphopenia, neutrophilia, impaired renal function and sever lung involvement in CT scan should be examined with extra care due to the increased chance of death in these patients.