نتایج جستجو برای: nutlet micromorphology
تعداد نتایج: 898 فیلتر نتایج به سال:
Based on the suggestion that flower and fruit are integrally evolving structures, we aimed to reveal floral traits persisting in structure Iris pseudacorus, a widely distributed riparian species Ukraine. We intended compare results with other studied previously constancy of micromorphological features interior structure. revealed exomorphological peculiarities fruiting ovary using model vertica...
The morphology of 11 species of the genus Vicia from Iran was studied using Scanning Electron Microscopy (SEM). The main pattern in seed coat sculpturing in the species was papillose, but the size and the number of side ribs in papillae and the density of papillae, were different in various species. Four morphological characters of seeds: relative hilum length and shape, relative position of th...
global warming is claimed to be the cause of climate change, which is often held responsible for water shortage. let geopedology represents the complex process of soil formation, out of which much can be learnt about paleoecology; soil formation being a dynamic interaction between the atmosphere, biosphere, lithosphere, and the hydrosphere. in a multidisciplinary sustainability-oriented study ...
میکرومورفولوژی هفده گونه متعلق به جنس قاصدک (تیره آفتابگردان) با استفاده از میکروسکوپ الکترونی مورد بررسی قرار گرفت. در این مطالعه دوازده صفت کمی و کیفی از قبیل طول، عرض و رنگ فندقه، نوع و اندازه تزئینات بدنه فندقه، طول منقار، طول و رنگ پاپوس بررسی شد. آنالیز خوشهای و آنالیز مولفه اصلی دادهها نشان داد که میکرومورفولوژی فندقه در تفکیک گونه ها از یکدیگر نقش مهمی داشته در حالیکه جداسازی در سطح ب...
جنس nonea medik. با حدود 35 گونه ، یکی از بزرگترین جنسهای خانوادۀ boraginaceae، قبیلۀ boragineae، در جهان است. در این بازبینی، بیشتر ازصفات زایشی، که عموماً کمتر تحت تأثیر محیط قرار می گیرند، استفاده شده است. صفات زایشی مورد نظر شکل کلاله، موقعیت کلاله نسبت به بساکها، شکل فلس گلوگاه، رنگ، شکل و تقارن گل و صفات مربوط به مریکارپ نمونه ها بوده است. همچنین کلید شناسایی گونه ها بر اساس صفات ساختاری...
nonea medik. is a genus of the boraginaceae tribe boragineae, with approximately 35 species worldwide. examination of their palynological characters supported the separation of taxa, which is usually based on morphological and micromorphological reproductive features. pollen grains of 10 taxa representing three groups of taxa in iran, the n. caspica group, the n. persica group and the n. lutea ...
Examination of sealants recovered at their moment of failure offers clues to factors which played a role in failure. The fitting surfaces of 10 failed sealants recovered immech’ately after placement, and 14 winch had failed after several months in the mouth were examined by scanning electron microscopy. Large areas of the fitting surfaces were smooth, with only localized regions showing evidenc...
Structural integrity of bone tissue plays an important role in daily activities of humans. However, traumatic incidents such as sports injuries, collisions and falls can cause bone fracture, servere pain and mobility loss. In addition, ageing and degenerative bone diseases such as osteoporosis can increase the risk of fracture [1]. As a composite-like material, a cortical bone tissue is capable...
BACKGROUND Wet snuff is commonly used by both males and females in different parts of Pakistan. Apart from other ingredients, tobacco is the major component of snuff. Adverse effects of smoking on morphology of human placenta have been shown by some previous studies. But snuff is not considered as dangerous as smoking during pregnancy. This study was designed to see the effects of snuff on morp...
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