Abstract This study was carried out to evaluate the exposure of lead (Pb) to some workers in Ash-Shoula lead acid battery Factory, Tajoura, Libya on the basis of concentrations of Pb in blood, hair, and nails. This study was done to explain, if accumulation of Pb could affect the concentration of essential liver enzymes, renal excretion, and some of hematological parameters. Study samples were based on, the number of years of work in battery manufactory, six work periods were constituted (< 5, 6-10, 11-15, 16-20, 21-25, >25 years). Workers were selected from seven different departments of the battery manufactory. Pb concentration in the collected samples were measured by using atomic absorption Spectroscopy. The statistical analysis were performed using SPSS software, version 20. The parametric tests (one-way ANOVA, t-test, and 2-tailed person Correlations) where P-value ≤ 0.05 was considered significant.Blood lead level was found high ranging from 9.9-60.3 μg/dl with a mean of 25.3 μg/dl and was found to be less in control group, ranging from 2.5-24.6 μg/dl with a mean of 11.8 μg/dl. The values of hair lead level were found to be ranging from 8.2-36.8 μg/g, with a mean of 21.1 μg/g and this was significantly higher than the control group (P
يوسف مسعود العزابي (2015)

Abstract This study is to identify some mutations in exons 23, 24, 26 A+B, and 26 A of the factor VIII gene that causes hemophilia A among Libyan patients. Forty-three patients (40 males, 3 females), 10 carrier, and 10 control (8 males, 2 females) were enrolled in this study. The total number were 63 samples for each exon. Blood samples were collected from Libyan patients (Department of Paediatric Hematology, Tripoli Medical Center), and kept in freezer at -20 Cº. The blood samples were transported to DNA laboratory in the Genetic Engineering Department and Human Tissues Department Biotechnology Research Center, Twesha- Libya. Genomic DNA was extracted from whole blood and DNA was visualized by Agarose Gel Electrophoresis, and DNA concentration was measured by Spectrophotometer. DNA was amplified by polymerase chain reaction (PCR) technique. Mutations were identified by restriction enzymes Taq I and Xba I. Taq I was used to detect nonsense mutations in Exon 23, 2147 [ Arg Stop codon (Term)], Exon 24, 2209 [ Arg Stop codon (Term)], and Exon 26 A+B, 2307 [ Arg Stop codon (Term)]. Our result showed no mutations were detected by using restriction enzyme Taq I in Exons 23, codon 2147, Exon 24, codon 2209, and Exon 26A+B, codon 2307. But by using restriction enzyme Xba I, we found six insertion mutations in Exon 26A, 3919 (ins GA) 11.3 % of 53 patients, and two partial deletion mutations in Exon 23 (3.8 % of 53 patients) refer to area failed to be amplified by PCR.
نادية نور الدين الصربوط (2010)

Efficient extraction of genomic DNA (gDNA) from biological materials found in harsh environments is the first step for successful forensic DNA profiling. This study aimed to evaluate two methods for DNA recovery from animal tissues (livers, muscles), focusing on the best storage temperature for DNA yield in term of quality, quantity, and integrity for use in several downstream molecular techniques. Six male Swiss albino mice were sacrificed, liver and muscle tissues (n=32) were then harvested and stored for one week in different temperatures, -20C, 4C, 25C and 40C. The conditioned animal tissues were used for DNA extraction by Chelex-100 method or NucleoSpin Blood and Tissue kit. The extracted gDNA was visualized on 1.5% agarose gel electrophoresis to determine the quality of gDNA and analysed spectrophotometrically to determine the DNA concentration and the purity. Both methods, Chelex-100 and NucleoSpin Blood and Tissue kit found to be appropriate for yielding high quantity of gDNA, with the Chelex100 method yielding a greater quantity (P < 0.045) than the kit. At -20C, 4C, and 25C temperatures, the concentration of DNA yield was numerically lower than at 40C. The NucleoSpin Blood and Tissue kit produced a higher (P=0.031) purity product than the Chelex-100 method, particularly for muscle tissues. The Chelex-100 method is cheap, fast, effective, and is a crucial tool for yielding DNA from animal tissues (livers, muscles) exposed to harsh environment with little limitations.
Huda H. Al-Griw, Zena A. Zraba, Salsabiel K. Al-Muntaser, Marwan M. Draid, Aisha M. Zaidi, Refaat M. Tabagh , Mohamed A. Al-Griw(8-2017)