منابع مشابه
Volvox
What is Volvox? The name comes from the Latin volvere, to roll, and ox, as in atrox, fierce. Volvox is a spherical multicellular green alga, which contains many small biflagellate somatic cells and a few large, non-motile reproductive cells called gonidia, and swims with a characteristic rolling motion. Ever since van Leeuwenhoek first viewed these algal ‘fierce rollers’ with utter fascination ...
متن کاملImmunohistochemical demonstration of dopamine receptor D2R in the primary cilia of the mouse pituitary gland.
Dopamine regulates the synthesis and secretion of prolactin and α-MSH/β-endorphin in lactotrophs and melanotrophs, respectively. While a predominant dopamine receptor, D2R, is known to be expressed in both the anterior and intermediate lobes of the pituitary gland, no previous immunohistochemical studies have shown the existence of D2R in the plasma membrane of pituitary endocrine cells. The pr...
متن کاملSexual Induction in Volvox Carteri
The study of the dependence of reactions on the concentration of various compounds is often of great value in determining reaction mechanisms . In chemical kinetics, it is often found that, according to van't Hoff's rule, the order of dependence of a reaction on the concentration of some compound involved in that reaction is equal to the number of molecules of the compound involved in each reac...
متن کاملDelineating a New Heterothallic Species of Volvox (Volvocaceae, Chlorophyceae) Using New Strains of “Volvox africanus”
The volvocine algae represent an excellent model lineage in which to study evolution of female and male genders based on comparative analyses of related species. Among these species, Volvox carteri has been extensively studied as a model of an oogamous and complex organism. However, it may have unique derived features that are not present in other species of Volvox. Therefore, information regar...
متن کاملClinical Demonstration and Results of Tuberculosis in People With AIDS
گزارشهای سازمان استاندارد ملی در آمریکا از سال ۱۹۵۳ بیانگر کاهش درصد مرگ و میر ناشی از سل و ابتلا به آن بوده است. حتی در اواخر ۱۹۷۰ با افزایش مهاجرت از کامبوج، لائوس و ویتنام به سایر نقاط جهان کاهش درصد ابتلا به سل نشان داده شده است. در طی سالهای ۸۷- ۱۹۸۵ افزایش موارد ابتلا به سل در سیاه پوستان /۶ ٪۳ در اسپانیائیها ۱۲/۷ ٪و در سفید پوستان غیر اسپانیایی ٪۴ / ۸ تخمین زده شده است. از سال ۱۹۹۰ اپید...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: New Phytologist
سال: 1914
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.1914.tb05761.x