Plants release a blend of volatile defense compounds in response to herbivore feeding. Whereas some of these volatiles act as direct deterrents, others serve as indirect defense signals that attract natural enemies of the foraging herbivores (reviewed in Dicke et al., 2003). For instance, the signal emitted from maize leaves damaged by lepidopteran larvae attracts parasitic wasps that deposit t...

The essential oil obtained by steam distillation of dried aerial parts of Ambrosia trifida L. from Northeast China was analyzed by GC and GC-MS. The essential oil yield based on dried plant material was 0.12% and thirty-five compounds (corresponding to 86.7% of the total weight) were identified. The main components were: bornyl acetate (15.5%), borneol (8.5%), caryophyllene oxide (8.3%), alpha-...

المرفق العام نظرية قضائية من نظريات الاجتهاد الإداري الفرنسي ، حظي باهتمام كبير طرف فقهاء القانون و نظرا لأهميته اعتباره أداة استيراتيجية في يد الحكومات فقد تنبه المشرع الجزائري لذلك وضع له ضوابط إطار قانوني سنة 2015 خلال المرسوم الرئاسي 15 / 247  المتضمن الصفقات العمومية تفويضات ليضبط بعدها اتفاقيات تفويض التنفيذي رقم 18 199 المتعلق بتفويض الذي أصبح مصدر أساس كل اتفاقية تبرم تسيير .

the chemical composition of the essential oils of flower at the pre-flowering, full-flowering and post-flowering stage of a. annua was analyzed by gc and gc/ms and sixty-two components were identified. the main compounds in the pre-flowering oil were β-myrcene (37.71%), 1, 8-cineole (16.11%) and camphor (14.97%). the full-flowering oil contained predominantly caryophyllene (19.4%), germacrene d...

Natural bicyclic sesquiterpenes, β-caryophyllene (BCP) and β-caryophyllene oxide (BCPO), are present in a large number of plants worldwide. Both BCP and BCPO (BCP(O)) possess significant anticancer activities, affecting growth and proliferation of numerous cancer cells. Nevertheless, their antineoplastic effects have hardly been investigated in vivo. In addition, both compounds potentiate the c...