Zjawiska miksoploidalności u Narcissus poeticus L. [Sur la mixoploïdie chez Narcissus poeticus L.]

Two new alkaloids from Narcissus serotinus L.

The Amaryllidaceae family is well known for the presence of an exclusive group of alkaloids with a wide range of biological activities. Narcissus serotinus L. is a plant belonging to this family and its geographical distribution is mainly located along the Mediterranean coast. In the present work, specimens collected near Casablanca (Morocco) were used to study the alkaloid content of this spec...

بررسی آلکالویید‌های گیاه نرگس (Narcissus tazetta L.)

مقدمه: گیاه نرگس متعلق به خانواده Amaryllidaceae گیاهی است تک لپه، پایا و دارای پیاز. این گیاه زینتی معطر، دارای آلکالوییدهای متنوعی است که خواص ضدتوموری، ضدویروسی و آنتی‌کولینرژیک دارند. هدف: این تحقیق به منظور شناسایی آلکالویید‌های موجود در پیاز‌های گیاه نرگس متعلق به استان گیلان در مرحله پس از گل‌دهی صورت گرفته است. روش بررسی: از پیازهای گیاه نرگس ابتدا یک عصاره اتانولی تهیه شد. این عصاره...

Sur l ’ équation div u = f

The main result is the following. Let be a bounded Lipschitz domain in Rd , d 2. Then for every f ∈ Ld( ) with ∫ f = 0, there exists a solution u ∈ C0( ) ∩ W1,d ( ) of the equation divu= f in , satisfying in addition u= 0 on ∂ and the estimate ‖u‖L∞ + ‖u‖W1,d C‖f ‖Ld , where C depends only on . However one cannot choose u depending linearly on f . To cite this article: J. Bourgain, H. Brezis, C...

Virus Diseases of Narcissus

Narcissus: Visualising Information

It is becoming increasingly important that support is provided for users who are dealing with complex information spaces. The need is driven by the growing number of domains where there is a requirement for users to understand, navigate and manipulate large sets of computer based data; by the increasing size and complexity of this information and by the pressures to use this information efficie...