Plants of the Past: A Popular Account of Fossil Plants
نویسندگان
چکیده
منابع مشابه
Fossil Plants of the Group Cycadofilices
filices " embraces a number of Paleozoic generic types combining structural characters of the ferns and of the gymnosperms. As originally established by Potonie 1 it was confined chiefly to genera founded on petrified trunks, petioles, and roots, with the provisional reference of several frond types. Subsequent research has established the correlation of the fronds of several of the members, an...
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in this work, a novel and fast method for direct analysis of volatile compounds (davc) of medicinal plants has been developed by holding a filament from different parts of a plant in the gc injection port. the extraction and analysis of volatile components of a small amount of plant were carried out in one-step without any sample preparation. after optimization of temperature, extraction time a...
Phylogenetic Analysis and Fossil Plants
Stein Jr., W.E., 1987. Phylogenetic analysis and fossil plants. Rev. Palaeobot. Palynol., 50:31 61. This paper presents a perspective on the relat ionship between cladistic methods and the study of fossil plants. Paleobotany has been slow in evaluat ing the potent ial of these and other explicit methods compared to other branches of systematics. However, the unique or part icular ly difficult p...
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در دوره های آموزش ترجمه استادان بیشتر سعی دارند دانشجویان را با انواع متون آشنا سازند، درحالی که کمتر به خطاهای مکرر آنان در متن ترجمه شده می پردازند. اهمیت تحقیق حاضر مبنی بر ارتکاب مکرر خطاهای ترجمانی حتی بعد از گذراندن دوره های تخصصی ترجمه از سوی دانشجویان است. هدف از آن تاکید بر خطاهای رایج میان دانشجویان مترجمی و کاهش این خطاها با افزایش آگاهی و هوشیاری دانشجویان از بروز آنها است.از آنجا ک...
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ژورنال
عنوان ژورنال: The Bryologist
سال: 1927
ISSN: 0007-2745
DOI: 10.2307/3238368