Cuvinte cheie. Filtre, microstrip, cuplaje încrucişate, optimizare. Rezumat. Articolul prezintă un studiu asupra posibilităţilor de îmbunătăţire a proiectării filtrelor trece-bandă de microunde cu cuplaje încrucişate, utilizând o procedură hibridă de optimizare. În acest fel toate caracteristicile filtrului, incluzând aici şi localizarea în frecvenţă a polilor de atenuare, pot fi precis control...

Common ivy (Hedera helix subsp. helix) is a well-known native and ornamental plant in Europe. Reports on contact dermatitis from ivy have regularly appeared since 1899. Recently, it has been suggested that allergic contact dermatitis from the plant may be under-diagnosed, partly due to lack of commercial patch test allergens. The objective of the article is to present the results of aimed patch...

The begomoviruses (family Geminiviridae) associated with cotton leaf curl disease (CLCuD) pose a major threat to cotton productivity in South-East Asia including Pakistan and India. These viruses have single-stranded, circular DNA genome, of ∼2800 nt in size, encapsidated in twinned icosa-hedera, transmitted by ubiquitous whitefly and are associated with satellite molecules referred to as alpha...

BACKGROUND Cutaneous leishmaniasis (CL) is common and endemic in many areas of Iran, caused by species of a protozoan parasite belonging to the genus Leishmania. There is not any effective vaccine against leishmaniasis; so, therapy is important for prevention and separation of disease. Herbal extract for treatment of CL is cost-effective, applicable topically to lesions, and can avoid the devel...

BACKGROUND The use of medicinal plants is an option for livestock farmers who are not allowed to use allopathic drugs under certified organic programs or cannot afford to use allopathic drugs for minor health problems of livestock. METHODS In 2003 we conducted semi-structured interviews with 60 participants obtained using a purposive sample. Medicinal plants are used to treat a range of condi...

BACKGROUND It is well known that the naturally occurring modified triterpenes in plants have a wide diversity of chemical structures and biological functions. The lupane-, oleanane-, and ursane-type triterpenes are the three major members of natural triterpenes with a wide range of biological properties. A systematic approach is necessary to review their structures and biological activities acc...

Gulma merupakan tumbuh-tumbuhan yang keberadaanya tidak diharapakan dan tumbuh secara liar di lahan budidaya. Pertumbuhan gulma menyebabkan permasalahan pada perkebunan kakao karena menggangu hasil produktivitas, sehingga perlu dilakukan pengendalian. Tujuan dari penelitian ini yaitu mengetahui efektivitas herbisida berbahan aktif 2,4 – D Dimetil Amina tanaman menghasilkan PTPN XII Kendenglembu...