"أهتم هذا البحث بدراسة نبات "بوزويزة" Perralderia garamantum Ascherson) ) التابع للفصيلة المركبة والمتوطن ومحدود التوزيع في ليبيا . المسح الكيميائي للنبات أظهر أنه يحتوي على مركبات قلويدية و مركبات فلافونولية . وعند دراسة التأثير المثبط لمستخلصات النبات (مستخلص بتروليم ايتر , ايثايل اسيتيت , الايثانول) وبتركيزات (3.125%,6.25%, 12.5%, 25% , 50% , 100%) على بكتيريا Bacillus subtilis , Salmonella ,Escherichia coli , Staphylococcus. aureus تبين أن مستخلص البتروليم ايتر لم يكن له تأثير على أي من الأنواع البكتيرية الأربعة , مستخلص الايثايل اسيتيت كان له تأثير على الأنواع البكتيرية المدروسة , والحد الأدنى للتركيز المثبط MICهو 3.125 ملجم/مل على البكتيريا B. subtilis . مستخلص الايثانول لم يكن له تأثير على نمو بكتيريا E. Coli, بينما أعطى تأثير على نمو الأنواع الثلاثة الأخرى والحد الأدنى للتركيز المثبط MIC لنمو البكتيريا B. subtilis, S. aureus هو12.5 ملجم/مل. فصل مستخلص الايثايل اسيتيت بطريقة كروماتوجرافيا العمود ومن تم بطريقة بايوتوجرافيا للحصول على المركب الذي له تأثير في تثبيط نمو البكتيريا B. Subtilis بشكل نقي لم تعطي نتائج. وقد فسرت النتيجة على أساس انه قد يكون تركيز المركب في العينة ضعيف , أو أن المركب يفقد القدرة على التأثير عند فصله عن باقي المركبات , أو لأسباب تقنية. السمية الخلوية لمستخلصات النبات على الخلايا البائية السرطانية عرفت من خلال تجربة انكسين ڤ للكشف على حصول الموت المبرمج للخلايا من عدمه. مستخلص الايثايل اسيتيت كان له تأثير سلبي على موت الخلايا المبرمج عند التركيزين 10 و 20 ملجم/مل . كلا من مستخلص بتروليم ايتر و الايثانول كان لهما تأثير موجب على موت الخلايا المبرمج عند التركيزين 10 و20 ملجم/مل ، وهذه النتائج مشجعة على الاستمرار في البحث مع هذا النبات الواعد.  Abstract This research has been concerned with the study of the plant Perralderia garamantum Ascherson, an endemic species to Libya. Phytochemical screening indicated that the plant species is containing alkaloids and flavonoids. The examination of plant extracts using petroleum ether ,ethyl acetate , and ethanol with the concentrations 3.125%,6.25%,12.5%,25%,50% and100% which run against four bacterial species: S. aureus, E. coli , Salmonella sp., B. subtilis. The results revealed that petroleum ether extract does not have any effect on these four species. Ethyl acetate extract have an effect on the four bacterial species , and the MIC value of ethyl acetate extract was 3.125 mg/ml when applied on B. subtilis. Ethanol extract has no effects on bacterial growth of E. coli while affected the growth of other three species. The MIC value of ethanol extract was 12.5 mg/ml when applied on B. subtilis and S. aureus. The separation of ethyl acetate extract by column chromatography then by bioautography to obtain the pure compound which inhibited the bacterial growth of B. subtilis gave no result. These was interpreted as the concentration of the compound in the sample was too weak or may be the compound lost its efficacy when separated from other compounds or may be due to technical reasons. Cytotoxicity of plant extracts on malignant B cells lymphocyte explained by Annexin v apoptosis did not occur on applying of ethyl acetate extract with 10 and 20 mg/ml concentrations, while apoptosis occurred on applying of petroleum ether and ethanol extracts with concentration 10 and 20 mg/ml."
عفاف عمر التركي (2014)

In this study, the linear structural relationship model’s slope parameter is determined by using the proposed robust nonparametric method based on trimmed mean. This method is an upgrade to the nonparametric method that was put forward by Al-Nasser and Ebrahem (2005) by employing trimmed mean for all likely paired slopes rather than median slopes. Simulation study and real data were used to compare the proposed method’s performance versus the traditional maximum likelihood method. In the simulation study, based on both methods’ mean square error, it was inferred that the MLE method breaks down due to the presence of outliers even though its functioning was not affected when there was no outlier in the data set. Based on the real life example, it can be concluded that the performance of our proposed method was quite well in determining slope parameter
Amel Saad Alshargawi, (1-2022)

Abstract The permittivities and dielectric losses of 2-Piperedone, -Caprolactam, 2-Azacyclooctanone and 2-Azacyclononanone have been studied in chloroform solutions. They have been measured using Q meter at frequency range 150KHz to 15MHz.Both 2-Piperedone and -Caprolactam solutions were studied at concentration range 0.05 to 0.25M and over temperatures range of -10 to 45 and. The dielectric studies of 2-Azacyclooctanone solutions cover a concentration range 0.05 to 0.125M and over temperature range of -10 to 45, while that of 2-Azacyclononanone solutions were studied at concentration range 0.01 to 0.075M and over temperature range of -10 to 45. The permittivities at higher concentrated solutions up to 1.5M of 2-Pipere-done, -Caprolactam and 2-Azacyclononanone were also measured at 2MHz using dipole meter DM01 over the temperature rang -10 to 45.The static permittivities for the four systems were discussed as the affect concentration, temperature and the number of CH2 group in the cyclic amides. All show normal behaviour except that the CH2 does not show clear affect. Single relaxation process were observed for the studied compound in the chloroform solutions ( =10-9 sec). All cases, the presence of a relaxation process was established at frequencies higher than used here. These relaxation processes were discussed in terms of their relation to concentration and the number of CH2 group. The dielectric activation energies were calculated using Eyring equation. The obtained values were discussed also in terms of concentration affect. A dependence of on concentration was observed. The dipole moments for the four studied compounds in solutions were evaluated using of Cole-Cole a semicircle plots, which considered to be associated with the relaxation process and other dipole moments were evaluated using =. This was assigned as an apparent dipole moment. All these dipole moments were discussed in terms of concentration and temperature affect. The obtained dipole moments in all studied case were much larger than those expected for planer dimers association. So they assigned to the presence of dimers and trimer or tetramers association in the studied solutions.Kirkwood correlation factor for the studied systems were calculated and discussed as a function of concentration. All values of g are less than unity and were assigned to a cyclic association form.
لطفية صادق حسن المجدوب (2010)