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The influence of the storage interval on quality of the apple stored under controlled storage condition
No full textApples, fruits that are characterized by taste qualities, nutritional, prophylactic and therapeutic value can be consumed in fresh condition for a long time when are stored under suitable conditions. Thus, it was aimed to identify the main organoleptic and phisico-chemical changes on the apples preserved within the Cerasus Grup Cotnari deposit by collecting samples represented by six apples varieties (Golden Reinders, Golden Delicious, Gala, Jonared, Idared și Braeburn) in two different intervals, respectively: November 2018 and January 2019. In terms of weight losses, it was
noted that these ranged between the minimum value of 5,8% for Gala variety and maximum of 15% for Golden Reinders variety. The value of the firmness decreases, the differences between the two collecting samples periods being between 0,7 kgF/cm2
(for Jonared variety) and a significant difference of 1,9 kgF/cm2 for Braeburn variety. Compared to the reference values that indicate an adequate storage at the values of firmness between 5 to 7 kgF/cm2 , it evidences indicates the urgency of the removal of the Braeburn variety from storage to marketing, which has a firmness value of
5,7 kgF/cm2 în January. The pH values were within the reference limits between 3,6 – 5 in both quality control intervals. There was a slight decrease on the pH values for all the varieties analyzed, an aspect closely correlated with the increase of the percentage of sugars by a 1% as a result of the hydrolysis of the starch and its transformation into
reducing carbohydrates during storage compared with the values obtain for the sampling from November. The results obtain for the vitamin C content for samples collected in November indicate a fall in the reference values (7 – 12 mg/100 g) for all varieties analyzed excepting the Golden Reiders variety which is lower (5,28 mg/100 g). Most
varieties evidence a decrease on vitamin C content by 2 mg/100 g in January, excepting the Golden Reinders and Gala varieties, who maintain their values constant. The results of the organoleptic and phytosanitary evaluation, pH values, iodine tests well as weight losses and firmness values have shown a major importance during the valorification of the
stored fruits because they can indicate exactly the optimal moment for marketing in terms of economic efficiency. drafted in English (10-15 rows, with special reference to research results)
Humanized mouse models and human viruses
No full textWell-developed mouse models are important for understanding the pathogenesis and progression of immunological
response to viral infections in humans. Moreover, to test vaccines, anti-viral drugs and therapeutic agents, mouse models
are fundamental for preclinical investigations. Human viruses, however, seldom infect mice due to differences in the
cellular receptors used by the viruses for entry, as well as in the innate immune responses in mice and humans. In other
words, a species barrier exists when using mouse models for investigating human viral infections. Developing transgenic
(Tg) mice models expressing the human genes coding for viral entry receptors and knock-out (KO) mice models devoid
of components involved in the innate immune response have, to some extent, overcome this barrier. Humanized mouse
models are a third approach, developed by engrafting functional human cells and tissues into immunodeficient mice.
With an increase in the advancement of modern techniques used for genetic manipulation, humanized mice have become
an important asset. They are becoming indispensable for analyzing human viral diseases since they nearly recapitulate
the human disease. These mouse models also serve to test the efficacy of vaccines and antiviral agents. The development
of humanized mouse models offers a preclinical in vivo platform for further characterization of human viral infections
and human immune responses triggered by these virus particles. This review highlights recent progress in utilizing
humanized mice to decipher human specific immune responses against viral tropism
Understanding the professional development of teachers in digital age
No full textThe present paper analyzes the importance of quality education and focuses on preparing teachers to delivery it. Today's society is characterized by its constant technological change. Today's students are increasingly aware of the world of technologies; That is why educators see the need to take advantage of this new source of intrinsic motivation using tools of this type and incorporate them in the development of activities that encourage students to take an active part in their learning processes. The use of these teaching mechanisms allows increasing the possibility of promoting new forms of learning oriented to the development of thinking strategies and interaction with other individuals while stimulating their level of personal activity. The use of technologies allows information to be acquired, processed, stored and disseminated, which contributes to the training of people so that they can adapt to new social challenges. In this sense, it is considered that educator training should be aimed at generating reflections on processes aimed at promoting the pedagogical use of tools, resources, programs, services and environments characterized by the use of technology. The 21st century teacher needs much more than a superficial or mechanical understanding of the fundamental ideas of a discipline. It must also penetrate the deep structures of knowledge and their relationships, as well as the methods of testing, evaluating and expanding them. They need pedagogical skills to make flexible use of knowledge, as this is how they can pay attention to the ideas that arise in the course of the learning process
Regimul hidric al solurilor în plantaţiile viticole din centrul viticol Copou Iaşi, din perioada 2016 – 2020
Get PDFThe multiannual average of the precipitations, for the Copou Iaşi
viticultural center, is of 579.6 mm (value calculated for the period 1981 - 2010),
out of which in the vegetation period (April-September) of 398.1 mm. From the
analysis of the data registered at SCDVV Iasi, in the last decades, it is found an
increased frequency of the dry years. Decreasing rainfall and high
temperatures have led to a sharp decline in soil moisture levels, well below the
optimal values for vines (50-80%) and increasing deficits. In the paper are
presented: the distribution of precipitation from 2016 to 2020, compared to the
multiannual average, accessible humidity and water deficit in the soil
Biomass yield enhancement of dhaincha (Sesbania species) through cultural practices
No full textThree separate field experiments were conducted to exploit biomass yield potential of dhaincha (Sesbania species) by different cultural practices. A total of six accessions from
three Sesbania species, viz. S. bispinosa (#05, 71, 77 and 109), S. cannabina (#28)
and S. sesban (#81), were used as experimental materials. Experimental treatments were population densities, viz. 180, 240 and 300 plants m-2; sowing dates, viz. 30 April, 15 May, 30 May and 15 June, and fertilizer doses, viz. 0 (without N/control), 10, 20 and
30 kg N ha-1. All the experiments were designed following randomized complete block design with three replications. Experiments on population density and sowing dates were conducted in control condition (without any fertilizer application). The N-fertilizer was applied as top dress at 30 days after sowing (DAS) and crops were harvested at 60DAS.
The maximum biomass (10.07 t ha-1) was obtained from 240 plants m-2. At 30 April
sowing, plants produced the tallest height (199.69 cm), widest base diameter (1.02cm),highest freshweight (62.07tha-1) and biomass yield (14.73 t ha-1). There
were no significant differences in biomass yield and yield contributing descriptors
between 20 and 30 kg N ha-1. Among the species, S. bispinosa was the best performer in terms of biomass yield and yield contributing descriptors. It may be concluded that S. bispinosa (accession #71) could be cultivated with the population density 240 plants m-2, at 30 April, without any fertilizer application. In case of later sowing/cultivation, the 20 kg N ha-1 could be applied for the maximization of biomass yield
Utilizarea aplicaţiilor in cloud pentru gestionarea şi interpretarea datelor în cadrul echipelor de cercetare
Get PDFCloud applications help research teams by providing the ability to
easily share experimental data, in real time, at any time of the day, on a wide
variety of terminals and from locations in different areas. Data storage is done
in an environment accessible to the entire team, removes the danger of data loss
due to human error or equipment failure.Data is also kept safe from cyberattacks.
The data analysis process is much faster, it can be done by several team
members simultaneously and the construction of research reports can be done
by combining the ideas of all members in an online discussion
Quality of raw milk obtained from brown breed exploited in Vrancea county
No full textHaving in view that, Brown breed have an important rate in cattle breed structure from Vrancea
County, we consider that it is opportune to carry out a study concerning the seasonal variation of
qualitative features of raw milk obtained from this breed, due to specific technologies and
technological factors management applied in the area.
The results of this research aim to complete the information regarding quality of raw milk
gathered from Brown breed cattle which are registered in Vrancea County Official Control of
productive performances. Research was carried out to determine the raw milk quality by specific
physical-chemical and microbiological analysis, for parameters such as: somatic cell count, dry
matter, fat, protein, lactose and casein content, urea, density and pH.
The mean values and variability estimators for somatic cell count ranged between 242600
(winter) and 573200 (summer), dry matter oscillated between 11.84% and 13.42%, the fat
percentage varied between 3.28% (spring) and 4.34% (winter), protein percentage recorded mean
values between 3.21% and 3.96% in autumn, respectively in winter; lactose content was between
3.78% and 4.87%, casein content ranged between 27.46 g/l and 29.29 g/l
Yield and Nutritional Response of Greenhouse Grown Tomato Cultivars to Sustainable Fertilization and Irrigation Management.
No full textTomato is considered one of the most important crops worldwide from nutritional and
economic standpoints, and, in this respect, sustainable production should be a prime objective, particularly in terms of fertilization and irrigation management. The aim of this study was to compare the effects of two fertilization types (chemical or organic) and two irrigation regimes (67% or 100% of evapotranspiration replenishment) on biometrical, biochemical, and yield parameters of three indeterminate cultivars of tomato grown in a greenhouse. The results showed that the effect of organic fertilization was better compared to chemical fertilization for lycopene accumulation and antioxidant activity, as well as for the lower concentrations of any of the macroelements in the tomato fruits;
therefore, organic fertilization can be used as an alternative to chemical fertilization in sustainable horticulture. In each cultivar under the same fertilization type, the e ect of irrigation was significant on yield and the number of fruits, but the 100% evapotranspiration restoration did not enhance the fruit concentration of all the macroelements and microelements compared to 67% irrigation regime.Higher concentrations of macro- and microelements in the chemically fertilized fruits compared
to the organic ones, regardless of the cultivar and the irrigation regime, suggest that the inorganic substances are more easily absorbed by plants under a protected environment. Organic fertilization positively affected the lycopene and antioxidant activities of tomato fruits, thus proving to be a valuable alternative to chemical fertilization in sustainable agriculture, although the product premium quality also depends on the cultivar used
Determination of total aflatoxins and aflatoxin B1 content in oleaginous seeds and dried fruits coming from supermarkets and small shops
No full textA very important category of mycotoxins are aflatoxins, made by Aspergillus fungi (A. flavus, A. parasiticus and A. nominus). From all aflatoxins, the following stand out: aflatoxin B1 (AFB1) - most toxic one, aflatoxin B2, G1 and G2 Study was conducted on 25 samples of fruit and seeds originating from supermarkets and small shops around
Transylvania. Organoleptic and mycotoxicological tests were performed for all samples. For mycotoxicological testing, RIDASCREEN®FAST Aflatoxin was used, an immunoenzymatic competitive test for quantitative determination of aflatoxins from aliments and cereals and RIDASCREEN AFLATOXIN B1, ELISA test for quantitative determination of Aflatoxin B1 from cereals and fodders. Upon organoleptic testing, 2 samples were noticed to have modified parameters.Mycotoxicological testing revealed 6 samples with higher than normal total aflatoxin content, and 1 sample contained aflatoxin B1 above the upper limit established by the European legislation. The highest total flatoxin and aflatoxin B1 levels were found in roasted corn (46.5 ppb for total aflatoxins, espectively 4.01ppb for Aflatoxin B1)
Capacitatea antiradicalică a unor vinuri roşii produse în podgoria Iaşi în relaţie cu conţinutul fenolic al acestora
Get PDFIn recent years great attention has been paid to food antioxidants and their association with multiple health benefits. Free radical scavenging activity is currently considered to be one of the most important characteristics of wine and is often associated with its polyphenolic content. The aim of this paper was the assessment of total phenolic compounds, anthocyanin and tannin contents of five wines (Cabernet Sauvignon, Merlot, Pinot gris, Arcaşand Busuioacă de Bohotin) produced in the NE of Romania -Iasi vineyard, from 2018 and 2019 harvests, in relation to their free radical scavenging activity (DPPH). High content of phenolic compounds (flavonoids and non-flavonoids) and their positive correlation with the free radical scavenging activity of the analysed samples suggests that rose and red winesareexcellent source of compounds with antiradical capacity