هذه الدراسة تتناول تأثير نبات مسك الليل على السلوكيات لفئران التجارب؛ النبات يسمى محليا نبات مسك اليل واسمه العلمي Cestrum nocturnum من العائلة Solanaceae البيتنجانية؛ وهو يستخدم لاضطرابات مختلفة في الطب الشعبي؛ في هذا البحث تم استخلاص النبات بطريقة النقع باستخدام الكحول الميثيلي. كما خضع نبات مسك اليل لدراسة كيميائية مبدئية لمعرفة المكونات الفعالة للنبات. أظهرت النتائج وجود العديد من المكونات العضوية وغير العضوية؛ كما تم اجراء العديد من التجارب الفارماكولوجية على مستخلص النبات باستخدام فئران التجارب (Albino mice) لدراسة تأثير النبات على الجهاز العصبي المركزي. بعد اجراء اختبارات السمية و تقدير LD50 (1361,758 mg/Kg)؛ تم اختيار الجرعات المستخدمة خلال هذه الدراسة وهي (1000, 500, 250, 125 mg/Kg). وقد درس اختبار اروين (Irwin) باستخدام اربع جرعات مختلفة (1000, 500, 250, 125 mg/Kg)؛ وكشفت النتائج تغير في بعض العوامل المقاسة في هذه التجربة مع زيادة الجرعة المستخدمة وهي: الإدراك والسلبية؛ والنشاط الحركي العفوي؛ والاستجابة للألم؛ والمشي الغير طبيعي؛ وقوة التمسك ووضعية الجسم؛ وفتحة الجفن. وفي هذه الدراسة تم توجيه الانتباه لبعض التغيرات؛ وتمت دراسة تأثير النبات على النشاط الحركي باستعمال الحلبة المفتوحة (Open feild) وقد تبين ان الجرعتين (500, 250 mg/Kg) أظهرت نقص في النشاط الحركي المتنقل وغير المتنقل.وتم أيضا اختبار القلق والسلوك باستعمال جهاز (Plus-maze) وأظهرت الدراسة عدم التأثير على القلق بينما أثبتت أن هناك نقص في النشاط الكلي. كما أثبتت الدراسة أنه ليس لنبات مسك الليل أي تأثير على السلوك الاجتهادي في اختبار(Forced swimming test ) أيضا تضمنت الدراسة البحث في امكانية تأثير النبات كمسكن للألم باستعمال طريقتين لإحداث الألم. 1) الطريقة الحرارية (Hot plate method) للكشف عن المسكنات التي تعمل على الجهاز المركزي. 2) الطريقة الكيميائية (Acetic acid induce writhing reflex method) احداث الألم بواسطة حقن حمض الخليك في تجويف بطن الحيوانات؛ للكشف عن المسكنات التي تعمل على الجهاز الطرفي. وبذلك أظهرت الدراسة أن الجرعات (1000, 500, 250, 125 mg/Kg) من مستخلص نبات مسك الليل لها تأثير مسكن للألم. ومن المثير للاهتمام في هذه الدراسة أن تأثير النبات كمسكن للألم كان أكثر من تأثير الأسبيرين (Aspirin) وذلك لجميع الجرعات المستخدمة؛ وأيضا أثبتت الدراسة أن النبات له تأثير مسكن بعمله على الجهاز الطرفي وعدم تأثيره على الجهاز المركزي . وبذلك أثبتت نتائج الاختبارات التي اجريت في هذه الدراسة أن نبات مسك الليل قد يكون له تأثير منوم وأيضا مسكن قوي للألم. ولكن لا ينصح باستعمال المستخلص الخام للنبات لتجنب السمية المصاحبة للتأثير العلاجي. وعليه نأمل اقامة العديد من الدراسات اللازمة لتحديد مكونات النبات المسئولة على العديد من التأثيرات الفارماكولوجية المفيدة. Abstract Cestrum nocturnum, locally named “Mesk El-lail” is a garden shrub belongs to the family Solanaceae. Cestrum nocturnum is used as a remedy for different health disorders. The aim of present work was to investigate the pharmacological action of Cestrum nocturnum methanolic extract on behavior; also, the plant was subjected to preliminary toxicity study to evaluate the acute toxic effect of the Cestrum nocturnum extract in mice. Doses used throughout this work, was adapted according to toxicity studies and estimation of the LD50 (1361.8 mg/kg). Irwin test was studied using four different doses (125, 250, 500 and 1000 mg/kg). Data revealed changing in some parameters with an increase in the doses of Cestrum nocturnum extract; parameters observed and reported included alertness, passivity, spontaneous motor activity, touch response, pain response, abnormal gait, grip strength, body posture and palpebral opening. In the present study, spontaneous motor activity was studied using photoelectrical cell test; two doses (250 and 500mg/kg) of Cestrum nocturnum extract were used and data showed decrease in: horizontal; ambulatory non-ambulatory movement; and number of movement of the mice. Elevated Plusmaze was used to investigate the effect of Cestrum nocturnum extract on anxiety and to ensure the effect of Cestrum nocturnum on the motor activity. In present work Cestrum nocturnum did not affect anxiety measure but showed decrease in the motor activity. Cestrum nocturnum did not demonstrate any stress related behavioral alteration in forced Swimming test. In this current study, the analgesic effect of the plant extract was studied in mice using two methods of pain induction: i) thermal method, using Hot Plate for investigation of centrally acting analgesics; ii) chemical method, provoked by acetic acid induced abdominal writhing reflexes for investigation of peripherally acting analgesics. Regarding the peripheral analgesic activity, statistical analysis of the results revealed that the doses of 125, 250, 500 and 1000 mg/Kg of Cestrum nocturnum extract provoked significant peripheral analgesic activity; but data obtained in this work, showed that all the four different doses of Cestrum nocturnum extract which were administered to mice, did not induce any central analgesic activity when compared with the control group. In conclusion, Cestrum nocturnum demonstrated sedative effect and strong dose dependent peripheral analgesic activity; however, it is not recommended to use the crude extract of the plant in order to avoid toxicity that may accompany its clinical use.The plant is rich in active constituents and needs further studies for isolation, investigation and identification of the active constituents which may contribute to its beneficial effects.
امينه ميلود الشريف (2014)

Caffeine is the most commonly used psychoactive substance throughout the world. It is found in coffee, black tea, and chocolate, as it is produced naturally in the beans and leaves of the plants used to manufacture these products. This study aimed to make a survey study among children 2-11 years in some Tripoli, Libya schools to determine caffeine concentration in number of beverages and foods consumed by studied children. About 313 copies of the questionnaire were distributed to students to be filled by their parents. Caffeine was extracted from samples using dichloromethane. Purity of isolated caffeine was estimated by using TLC method.Quantitative analysis of caffeine was performed by using a UV-Visible spectrophotometer. Chocolate biscuits, chocolate cake, cocoa milk and chocolate ice cream were the highest consumed products among the studied children (81%, 79%, 67% and 63% respectively). The highest side effects of caffeine consumption was hyperactivity was the highest side effect in children (76%). Some children also suffered from severe side effects such as panic attack (14%). Naseem ice cream sample showed the highest caffeine content (28 mg/serving) among solid samples.Whereas in the beverages, energy drink samples Red pull, XIR and Shark were 268, 262 and 250 mg/serving respectively. In conclusion, there was excessive consumption of caffeine among the studied group of children and some of them showed side effects and even severe side effects. Variety of tested foods and beverages under the study contained uncontrolled concentrations of caffeine. In addition, chocolate milk (Al Rayhan), contained no caffeine. arabic 15 English 97
Sakina S. Saadawi, Khairi A. Alennabi, AMAL .A ABOALLA AMMAR, , , ٍSuhera Mehemed Abdulsalam Aburawi(9-2019)

More than 2000 cultivars of Phoenix dactylifera L. are known to grow around the world. Date is an essential fruit in North Africa, and in Libya in particular, it represents an important national food resource. Recently, researchers discovered the medicinal value of different parts of palm tree beside the well known nutritional value of the fruit edible part. In this study five Libyan date seeds (Bestian, Deglet, Abel, Khadrai and Hamrai) were collected from Aljofra region and were screened for phytochemical components and their antimicrobial activity. The phytochemical analysis of methanolic extract of five different Libyan date palm seeds showed the presence of aflavnoids, glycosides, phytosterols, phenolic compound, tannins, and fixed oil, absences of alkaloids and saponine. The susceptibility of bacterial species to five methanolic extracts of Phoenix dactylifera L seeds by cup-cut agar method exhibited Inhibition zones (IZD). That inhibition zone diameters are vary from 15.0 0.3 to 3.02 0.01 against MRSA; 16.040.1 to 6.0  0.7 against Pseudomonas aeruginosa; 14.2 0.1 to 6.00.7 against Proteus vulgaris; 18.3 0.2 to 6.0 0.1 against Staphylococcus aureus; 14.04 0.2 to 2.0 0.02 against E. coli; and 18.0 0.1 to3.2 0.02 against Klebsiella pneumonia. The results of current study shows the antibacterial properties of five Libyan samples of date seed extract against a wide spectrum of bacteria. arabic 21 English 126
Basma Doro, Nahla Labyad, Fadia Gafri(1-2020)