RIULS (Repository of Iași University of Life Sciences)
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Research on the influence of the use of some oenological products on the ageing on lees of white and rosé wines, obtained in the IasiCopou vineyard
No full textGrowth analysis of Cineraria maritima plants in green façade systems: Northeastern Romania climate study
No full textGreen facades are gradually gaining popularity and may become a modern architectural solution for higher microclimate quality and better urban comfort in densely populated urban areas. This study aimed to monitor the behaviour of Cineraria maritima planted in green facade systems oriented towards four cardinal points in the specific climatic conditions of northeastern Romania in order to test its adaptability and growth in this system. Comparisons were made of its behaviour between the facades of the experimental structure, and between the facades of the experimental structure and the traditional ‘planted in soil’ variant (control variant). Cineraria maritima exhibited good adaptability to vertical cultivation, maintaining its aesthetic properties throughout the growing season. All specimens that overwintered on the facades successfully survived the cold season of 2021–2022 without requiring any cutting or protection measures
Statistical analysis of preliminary studies for hemp concrete
No full textWaste is a major worldwide problem and its recycling has become mandatory in the current context of the decrease in natural resources. The management of recyclable waste improves the efficiency of any economic activities and the impact on the environment decreases proportionally to the quantities reused. With a significant impact on carbon dioxide emissions, the construction sector is one of the largest consumers of energy and raw materials. Hemp, and other biomass waste, are by-products in agriculture, making important contributions to the development of ecological materials by incorporating important quantities of such recyclable waste. This paper presents a series of different hemp concrete compositions that aim to obtain the optimum ratio between the binder and hemp shiv, in order to determine the inflection point towards which the delimitation can be made between insulating materials and materials with improved mechanical resistance. The importance of the work is given by the fact that, until now, the optimal proportion between the binder and hemp wood chips has not been demonstrated. This turning point must be justified by a variation of the mechanical resistance or a variation of the heat transfer coefficient, through the conductivity of the obtained samples. After preliminary testing, the statistical analysis will allow identification of the specific quantities needed to improve the physical-mechanical performance of the hemp-concrete recipe. Thus, by adding a justified amount of binder, an ecological material based on vegetable waste from agricultural crops is obtained. The material will have thermo-mechanical properties designed for a specific situation, required by the minimum performance imposed by the destination for which it will be made
A Combinatorial Study for the Distribution of Phenotypes
No full textIn this paper we consider the cases of simple dominance for dihybrid cross, trihybrid cross and the 4− hybrid cross, in order to notice that the distribution of phenotypes forms a lattice. Moreover, the lattice has an interesting property: it is isomorphic with the lattice of the divisors of 2, being a nonzero natural number
The effectiveness of heat treatment processes applied to sour cream for the production of butter, validated by enzymatic methods
No full textThe purpose of this article was to evaluate the efficacy of heat treatment procedures used on sour cream, a raw material used to make butter. To investigate the safety of sour cream, 25 samples of unpasteurized sour cream, 25 samples of pasteurised sour cream, and 25 samples of butter were evaluated. The samples were then subjected to enzymatic and biochemical analysis. The titratable acidity of unpasteurized sour cream resulted was 19.84±0.10 °T. All 25 samples tested positive for peroxidase activity. The titratable acidity of pasteurised sour cream was 20.24°T, although the peroxidase activity was negative. Using the reductase test with methylene blue, the samples of unpasteurized sour cream ranged in the second quality class, with a discoloration interval of samples substrate till 289.60±3.49 minutes. The titratable acidity of the butter was 2.59±0.04°T, and the peroxidase activity was negative in all 25 samples. The sour cream heat treatment techniques have been validated, with the examination of the two dairy products yielding good findings in compliance with standards
The acidity in the must of the feteasca alba variety, in relation to fertilization and the content of macroelements in the plant
Get PDFThe research focused on the analysis of the impact of these macroelements, used in different doses and ratios, on the accumulations in the plant and on the production quality, respectively on the varied acidity of Fetească albă must. The analysed Fetească albă variety is one of the predominant varieties of the Sorogari wine-growing center, belonging to the Iasi vineyard. The soils of the area under study are part of the group of anthropogenic soils, such as cambic cherno-zones, forest ash and regosols, with uneven fertility. Values of the content in the plant of 2. 2% N, 0. 83% P, 0.883 K as well as acidity values of 5.27 g/l H2SO4, by applying fertilizers in the minimum necessary doses, certify that they can be at the level statistical assurances It can be stated that the use of doses of fertilizers according to the criterion of sufficiency, in the analysed agro-eco-pedological context, ensures that the optimal experimental doses, optimal contents in the plant of macronutrients and implicitly, the nutrition environment is protected from pollution
Identification of sunflower genotypes tolerant at drought
No full textSunflower represents the main oil crop in Romania and is considered a moderately crop drought tolerant but in years
with low precipitations seed yield is affected. In recent years, the temperature increased by 2-3 degrees Celsius
compared to multi-year average over 60 years. In south-eastern of Romania (agricultural area Fundulea), in 2020, the
average annual temperature was 13.5°C, in 2021, it was 12.1°C and in 2022, it was 13.3°C compared with multi-year
average over 60 years who was 10.9°C. Rainfalls decreased in last four years from value of 303.3 mm, multi-year
average over 60 years total from months April to August in South eastern of Romania, to a total of 180 mm in years
2020 and 2022, 269 mm in year 2021 and a total of 200 mm in 2023. In conditions of water stress and global warming
we must identify sunflower genotypes with tolerance at drought and heat. In this paper we present results regarding
resistance at water stress through observations development root system of sunflower genotypes under artificial
condition in greenhouse and behavior in non-irrigated field in Calarasi county (Fundulea area) and Braila, in year 2023.
Sunflower genotypes, S 23-5, S 23-6 and S 23-7 with very developed root system in water stress conditions was
obtained thought interspecific hybridization with wild annual specie Helianthus argophyllus and with wild perennial
species Helianthus tuberosus and Helianthus maximiliani
Application of Agri-Food By-Products in the Food Industry
No full textEvery year, the global food industry produces a significant number of wastes and by-products from a variety of sources. By-products from the food-processing sector are produced in large quantities, and because of their undesirable qualities, they are frequently wasted, losing important resources. In order to pursue a circular economy that refers to waste reduction and effective waste management, by-products valorization recently received increased interest. By-products are rich in bioactive compounds and can be used in various industrial applications for health promotion and nutritional benefits. A novel step in its sustainable application is the use of these inexpensive waste agri-food by-products to create the value-added products. The present review intended to summarize the different types of agro-industrial by-products and their properties and highlight their nutritional composition and potential health benefits. Applications of agri-food by-products in foods as well as the potential health and sustainability implications of by-products in food products were also covered. According to research, agri-food by-products can be added to a variety of food to increase their bioactive profile, fiber content, and antioxidant capacity while maintaining good sensory acceptability. Overall, the sustainability of the agri-food chain and consumer health can both benefit from the use of agri-food by-products in food formulation
Smoking Temperature Characteristics and Influence of Quality Indicators on Phytophagus Fillet (Hypophthalmichthys Molitrix)
No full textThe evolution of modern technologies for preserving fish and fish products has led to the eclipse of the preservation properties of many traditional methods, including the smoking method. Nowadays, the main purpose of smoking has been redirected towards highlighting the sensory quality rather than its preserving effect. The main aim of this paper is to highlight the physicochemical, sensory, and color characteristics of smoked phytophagous fillets. To produce the necessary products, nine specimens of phytophagous (Hypophthalmichthys molitrix) were harvested from the fish farm "Piscicola Vlădeni, CC&C PES SRL" Iasi, which were processed and prepared in the Microproduction Workshops of the Iasi University for Life Sciences "Ion Ionescu de la Brad". Three different smoking methods were applied to the fillets resulting from the phytophagous processing; hot smoking, semi-hot smoking, and cold smoking. From a physicochemical point of view, in the case of the batch with hot smoking quantity, a lipid content of 1.76±0.024% was recorded, higher compared to the L2ASC (0.94±0.04%) and L3AR (0.86±0.024%) batches. As regards protein content, the highest value was also found in lot L1AC (22.2±0.083%), followed by lot L2ASC (22.18±0.02%), with the lowest value in lot L3AR (21.96±0.024%). The most appreciated fillets were those processed by heat treatment with semi-warm and warm smoking