Extraction of Invertase Enzyme from Selected Plants with Storage Roots and Investigation of Some of Its Properties

Huda Mohamed Kondi
Marwa Al-Areiq
Najat Ashour
Mawada Ahaddoud
Aliaa Al-Dhuwibi
The aim of this research was to extract the invertase enzyme from carrots, turnip and radish present in the local market and to determine some of its properties. The crude extract was prepared using an electric juicer and to get rid of sediments, the juice was centrifuged at 4000 revolutions / minute for 15 minutes, and using special solutions and equations that estimated the enzymatic activity. For invertase in the three plants, the carrot extract showed the highest enzymatic activity (28.8 u/ml) Therefore, the carrot plant was chosen to be the plant under study to characterize the invertase properties The enzyme is (35C), and the invertase enzyme has shown thermal stability at (60C) even after 15 minutes, then the enzymatic activity decreased, and through this study it was found that the invertase enzyme could not maintain its effectiveness when stored at room temperature for more than 5 days.

Testing the efficiency of baking yeast (Saccharomyces cerevisiae) on some characteristics of vegetative growth and productivity of bean plant Vicia faba L.

Awatf Ali Abuiflayjah
Ahlam Algamodi Zaet
Soad Mohamed Aboalgeat
This field study was conducted to test the efficiency of using a dry yeast solution on some characteristics of vegetative growth, such as plant height, number of branches, number and area of leaflets, shoot and root wet and dry weight, number of seeds, and productivity of bean plants. The plants were treated after 30, 40, and 50 days of cultivation with concentrations of 0%, 5%, and 10% by spraying on the leaves and irrigation around the roots, overlapping between them P= 0.002 10%, while there were no significant differences between concentrations of 5% and 10%, where the average stem length was 48.0 cm at concentration 5%, 48.67 cm at concentration 10%, and 44.50 cm at control, and it was also concluded that there were significant differences in leaf area. P= 0.016 Between the concentrations of 5 and 10% by 9.91 and 2.50, respectively, and the percentage of leaf area in the control was 7.42%, there was also a significant difference in the number of leaflets P= 0.057, as the average n.

Evaluation of the susceptibility of some olive cultivars to Pit scale, Cocta Pollinia pollini

Sana Taib Sherlala
Hatem Elhadi Abukraa
Amar Omran Alshamamm
Salem Khaleefh Asageer
Munsef Mohamed Alzantouti
This study was conducted to evaluate the susceptibility of five economic olive cultivars (Frentoi, Chemalali, Corantina, Leccino, and Endori) to infection by the stone scale insect Pollinia pollini Costa at the Sidi El-Masry Research Station in Tripoli during the year 2022 under the rain-fed system. Four trees of each species were chosen randomly, with four samples for each tree. The study showed that there were significant differences between the varieties for the numerical density of nymphs with a value of 0.007, the highest of which was the Frantoi variety with an average of 56.6 nymphs, followed by the Shamali, Quarentina, Leccino, and Endori varieties with averages of 23.6, 21.8, 16.8 and 4.5 nymphs, respectively. The significant differences in numerical density between the adult varieties were recorded at a value of 0.014, the highest being the Frantoi variety with an average of 50.7 nymphs, followed by the Chemalali, Quarantina, Andori, and Leccino varieties with averages of 22..

Application of Spatial Analysis Systems to Identify the Optimal Sites for Landfilling of Domestic Waste in the Municipality of Shatt, Libya

Hawa Abdul Daim Idris
Youssef Faraj Abdulrahman
In this study, geographic information system used in the field of environmental planning to choose the most appropriate sites for burying waste in the city of Shahat by applying spatial analysis systems and determining some environmental standards and criterion. Including land uses, where the land cover classified based on the satellite image (Sentinel 2) for the year 2022, from which a digital map produced and divided the study area into four categories: (forest, agricultural, bare, residential). Bare land given the highest value 2, while the rest of the other classifications given a value 1. The second criterion is the distance from residential complexes where the spatial buffer (Buffer) used to determine the distance from residential areas. Five levels were determined, and the most appropriate distance from residential complexes was from 2000-2500 meters and given the highest value of suitability degrees, while the worst was a distance of less tha.