Scientific Journal for Faculty of Science-Sirte University

Effect of Immersion Time and Kinetin Growth Regulator on Micro Tuber Formation for Spunta Potato

2025-10-11T14:06:06+00:00

This study was conducted at plant Tissue culture department which, belongs to Biotechnology research center located in Tripoli . In this study, micro tubers of Spunta potato variety were obtained through use of liquid culture medium by using temporary immersion system (RITA). The effect of liquid medium immersion time on plant growth was studied, as well as the effect of adding the kinetin growth regulator at 5 mg / l with 8% sugar on number and weight of formed tubers was also studied. The results showed that increase of immersion time from 1 minute to 2.5 minutes has a significant effect on increasing number and weight of formed tubers in each treatment. The average of number of tubers increased from 8.42 to 17.14 and 21.14 tuber in the vessel respectively. The total mean number of tubers in each pot was also increased when the kinetin growth regulator was added from 20.28 to 28.85 and 32.71 tuber per pot respectively. The average of tubers weight in each jar was also increased from 4.10 to 9.92g when the kinetin growth regulator was added.

Evaluation Role of Activated Charcoal and Growth Regulators on Enhancement of Thymus Capitatus Micropropagation

2025-09-03T16:13:13+00:00

Due to the presence of bioactive compounds that have medicinal uses, the thyme plant (Thymus capitatus) is under increasing pressure. The population has continuously declined due to this pressure, which puts it at risk of depletion and extinction. The aim of this study is to identify effective ways to preserve this plant in vitro using plant tissue culture technique, as well as to pinpoint the key factors that contributed to its successful vegetative propagation, rooting, and acclimatization. Plant materials were collected from the Al-Shaafiyin region, followed by surface sterilization. They were then cultured on a medium supplemented with a combination of the growth regulators BA and NAA along with activated charcoal for vegetative propagation, another combination of IBA, NAA, and activated charcoal for rooting, and a separate formulation for plant acclimatization. The results showed that the best treatment for obtaining vegetative growth was the use of activated charcoal, which significantly outperformed all other treatments in terms of plant height, number of leaves, and number of branches, recording values of 3.03 cm, 76.4 leaves, and 5.5 branches, respectively.

This is attributed to its ability to absorb growth-inhibiting substances. The results also indicated that activated charcoal was the most effective treatment for root development, showing a significant superiority over the other treatments, with an average of 5 roots and a root length of 6.2 cm. Activated charcoal improved the properties of the growth medium by adsorbing inhibitory compounds and providing a phenol-free environment conducive to root development. Furthermore, the experiment demonstrated that a 1:1 (v/v) mixture of soil and peat moss resulted in the highest plant survival rate (80%), which is likely due to the balanced physical and chemical properties of the mixture. The use of activated charcoal in micropropagation programs is recommended due to its effectiveness in enhancing both shoot and root development, thereby creating a more favorable environment for plant tissue growth. It is also advisable to avoid culture media lacking activated charcoal. For the acclimatization stage, a 1:1 (v/v) mixture of soil and peat moss is recommended, as it provides adequate aeration, moisture retention, and essential nutrients necessary for plant survival.

Effect of Magnetized Water on Imbibition, Germination, Macronutrient Content (N, P, K) and Yield of Zucchini (Cucurbita pepo L.)

2025-10-10T06:36:43+00:00

Water scarcity and the deterioration of its quality represent the main obstacles to agricultural development in Libya, in addition to other challenges. This work was undertaken to investigate the effect of irrigation with magnetized water on the growth and productivity of zucchini plants (Cucurbita pepo L.). Three experiments were carried out: a laboratory experiment with three replicates per treatment, a plastic pot experiment with four replicates per treatment, and a field experiment with twelve replicates per treatment. Plants were watered with either magnetized or non-magnetized water, using a Completely Randomized Design (CRD). The research focused on seed imbibition and germination percentage, the plant’s content of macronutrients (N, P, K), and total production. The outcomes found that irrigation with magnetized water had a significant effect on the mean ultimate yield of the harvest, 2.8692 kg compared to 1.279 kg for the non-magnetized. Regarding the average seed imbibition and germination percentage, as well as macronutrient content, the outcomes showed differences between the two treatments in favor of the magnetized treatment; however, these variances were not statistically significant. Based on these findings, it appears that this method has a promising role in improving certain plant growth traits, making it worthy of further investigation. Moreover, it may represent a new approach toward the optimal use of saline irrigation water in agricultural production.

Theoretical Study of Electron – Phonon Interactions Using Linear Response Theory

2025-06-16T21:01:05+00:00

This work presents a theoretical investigation of electron–phonon interactions in transition metals using linear response theory, with the aim of evaluating the agreement between ab initio calculations and experimental data. The study focuses on aluminium (Al), molybdenum (Mo), and niobium (Nb), utilizing a wave-vector-dependent approach to calculate the electron–phonon coupling. The linear muffin-tin orbital (LMTO) method combined with the local density approximation (LDA) was employed to evaluate the screening of the one-electron potential within the framework of linear response theory. From these calculations, key physical parameters, including electron–phonon coupling strengths and transport coefficients, were extracted. The theoretical results show a strong correspondence with experimental measurements, demonstrating the reliability of the linear response approach in capturing electron–phonon coupling behaviour in these metals. These findings support the broader applicability of first-principles methods in the study of phonon-mediated transport phenomena in metallic systems.

Characteristics of Forward-Backward Shower Particle Production from the Interactions of 28Si With Emulsion Nuclei at High Energy

2025-08-02T14:36:06+00:00

This study investigates the characteristics of shower particles emitted in both forward and backward directions resulting from the interactions of ²⁸Si nuclei with nuclear emulsion at relativistic energies of 4.5 and 14.5 A GeV c⁻¹. The primary objective is to examine the mean multiplicities, multiplicity distributions, forward–backward correlations, and pseudorapidity distributions of these particles to gain deeper insight into the mechanisms of hadron production in high-energy nucleus–nucleus collisions. By comparing particle emissions in the forward region (θ < 90°) and backward region (θ > 90°), the study reveals clear differences in their dependence on projectile energy and mass. Forward particle multiplicities increase with both projectile mass and energy, while backward particle production remains largely independent of these factors, suggesting that backward emission is primarily influenced by the number of nucleons directly involved in the collision. In addition, pseudorapidity analysis demonstrates that forward distributions shift toward higher values with increasing energy, reflecting stronger longitudinal momentum transfer. These results contribute to understanding the dynamics of relativistic heavy-ion interactions, the role of participant–spectator matter, and the conditions that may lead to quark–gluon plasma formation

Textural Analysis and Clay Mineralogy of Sabkha Sediments in Wadi El-Sahal and Wadi El-Suwani, Tobruk City, Libya

2025-07-10T15:36:13+00:00

This study compares sediment characteristics of Wadi Elsahal and Wadi Al-Suwani sabkhas. This study sheds light on the grain size analysis and clay minerals, using the carbonate-sand-mud separation method, the sand-silt-clay method, and X-ray diffraction (XRD) to determine the proportions of clay minerals. In the intertidal zone, Wadi El-Suwani has a higher carbonate content (54.66%) than Wadi Elsahal (46.16%) and a slightly lower sand content (32.16% vs. 37%). The mud content is similar with Wadi El-Sahal slightly higher at 16.83%. In the supratidal zone, Wadi Elsahal shows higher carbonate (51.66%) and clay (29%), while Wadi El-Suwani has more sand (15%) and mud (47%). Both sabkhas show similar silt content (~69%). Clay mineral analysis from Wadi Elsahal reveals kaolinite ranging between 51–63% and illite from 37–49%. These differences reflect variations in depositional energy, with Wadi Elsahal indicating a stable carbonate-rich environment, while Wadi El-Suwani suggests more episodic energy events like wind or floods. Based on sediment and mineral composition, Wadi Elsahal represents a stable intertidal sabkha dominated by biogenic carbonates and fine sediments, while Wadi Al-Suwani reflects a dynamic supratidal sabkha environment influenced by variable energy and sediment supply. This study provides valuable insights into the sedimentary and mineralogical differences between Wadi ElSahal and Wadi El-Suwani sabkhas, contributing to a deeper understanding of coastal depositional processes in eastern Libya. The findings are significant for identifying stable versus dynamic sabkha environments, offering useful implications for sedimentology, geomorphological mapping, and environmental planning in arid coastal regions. There is a lack of detailed comparative studies focusing on the sediment and clay mineral characteristics of adjacent sabkha environments in eastern Libya especially between Wadi Elsahal and Wadi ElSuwani. This study aims to analyze and compare grain size and clay minerals in both sabkhas identify the dominant depositional processes and evaluate the environmental stability of each sabkha zone.

Temporal Trends and Inter-Annual Variability of Iron, Vitamin B12, and Vitamin D Deficiencies in Ajdabiya, Libya (2022–2025)

2025-09-09T18:00:46+00:00

Micronutrient deficiencies continue to pose a significant global health challenge, especially in areas grappling with socioeconomic constraints and poor dietary diversity. This study examined shifts in serum concentrations of iron (Fe), Vitamin B12 (vit B12), and vitamin D (vit D), spanning 2022 to 2025 among residents of Ajdabiya, Libya. The findings revealed notable year-to-year fluctuations. Fe levels peaked in 2022 (M = 75.06 µg/dL) but significantly dropped in 2023 (M = 45.19 µg/dL), experiencing a gradual recovery through 2024 and 2025. In contrast, vit B12 showed the lowest mean value in 2022 (M = 402.49 pg/mL) before surging to its highest level in 2023 (M = 524.16 pg/mL) and stabilizing thereafter. Vit D concentrations rose significantly in 2023 (M = 32.90 ng/mL) but experienced a modest decline over the subsequent two years. Elevated standard deviations for all biomarkers highlighted marked individual variability. Despite these inter-annual dynamics, deficiencies in Fe, vit B12, and vit D remain prevalent among the population of Ajdabiya. These findings underline the critical need for targeted nutritional interventions, diversification of diets, strategic supplementation, and proactive detection measures to combat micronutrient insufficiencies and reduce their potential health consequences over time.

Ecological Assessment of Water Quality and Aquatic Biodiversity in Macferson Lake, Prayagraj, Uttar Pradesh

2025-09-15T05:30:26+00:00

Abstract
In this study, the physico-chemical parameters as well as the biological diversity of Macferson Lake, Allahabad (Prayagraj), Uttar Pradesh, India was studied during the period June, 2022 to May 2023. Seasonal sampling covered the inspecting of temperature, pH, dissolved oxygen (DO), biochemical oxygen demand (BOD), total dissolve solids (TDS), electrical conductivity (EC), hardness and alkalinity and other parameters. Simultaneous biological studies determined phytoplankton, zooplankton, benthic macro invertebrates, fishes and aquatic macrophytes. The outcomes showed moderate and poor quality of water, demonstrating the eutrophication process, and the presence of eichhornia crassipes as well as fish and invertebrates resistant to pollution. Possible strategies of conserving and restoring lakes are then mentioned.