Exomorphic Characters of Seeds of Some Species of Capparaceae Family in Taif, KSA

Seed Coat ◽

Seed Shape ◽

Specific Level ◽

Coarse Texture ◽

Wide Range ◽

Capparis Decidua ◽

Sem Investigation ◽

Seed exomorphic characters of six species belonging to four genera of family Capparaceae were studied using light microscope (LM) and scanning electron microscopy (SEM) in order to determine the importance of seed features as taxonomic evidence. These species are Cadaba farinosa Forssk, Capparis decidua (Forssk). Edgew, Capparis cartilaginea Decne, Dipterygium glaucum Decne, Maerua crassifolia Forssk and Maerua oblongifolia (Forssk.) A. Rich. The diagnostic characters at level of the general and specific level are shape of seed, size, color, texture and seed coat surface. There is a wide range of variations of seed shape among the studied species. LM revealed that the studied seeds are mostly varying from ovate to globose or cardiac- shape. All of the seeds lack wings except Dipterygium glaucum Decne. and most of the seed is coarse texture. There are six main types of seed surface sculptures revealed by SEM investigation at higher magnifications; reticulate, rugose-striate, winding undulate, ribbed and papillate.

Seed morphology of Epilobium and Chamaenerion (Onagraceae) in Turkey

Phytotaxa ◽

10.11646/phytotaxa.331.2.2 ◽

2017 ◽

Vol 331 (2) ◽

pp. 169 ◽

Cited By ~ 1

Author(s):

KAMİL COŞKUNÇELEBİ ◽

SERDAR MAKBUL ◽

SEDA OKUR

Keyword(s):

Electron Microscopy ◽

Seed Morphology ◽

Morphological Features ◽

Seed Shape ◽

Generic Level ◽

Specific Level ◽

Periclinal Wall ◽

First Time ◽

Macro- and micro-morphological features of seeds belonging to 26 taxa from Turkey were observed under the light and scanning electron microscopy. Present findings partly agree with segregation of Epilobium and Chamerion at generic level. The members of the genus Epilobium were distinguished by seeds with conical, semispherical, cylindrical or crest-like papillae or without papillae, granulate periclinal surfaces, papillae with parallel, radial, irregular or spirally furrow and the members of Chamerion were distinguished by seeds crest-like papillae or without papillae and without granulate periclinal surfaces and without furrow. The results also showed that seed shape, presence/absence of papillae and beak, papillae shape and ornamentation, and periclinal wall features are valuable for delimiting the examined taxa specific level within both genera. A key to Turkish Epilobium and Chamerion taxa based on seed morphology is presented for the first time

Taxonomic application of macro and micro morphological characters of seeds in Astragalus L. (Galegeae, Fabaceae) in India

Phytotaxa ◽

10.11646/phytotaxa.502.2.8 ◽

2021 ◽

Vol 502 (2) ◽

pp. 191-207

Author(s):

SHIVANI KASHYAP ◽

CHANDAN KUMAR SAHU ◽

ROHIT KUMAR VERMA ◽

LAL BABU CHAUDHARY

Keyword(s):

Electron Microscopy ◽

Light Microscopy ◽

Seed Coat ◽

Morphological Plasticity ◽

Morphological Characters ◽

Individual Species ◽

Large Size ◽

The Individual ◽

Due to large size and enormous morphological plasticity, the taxonomy of the genus Astragalus is very complex and challenging. The identification and grouping of species chiefly based on macromorphological characters become sometimes difficult in the genus. In the present study, the micromorphology of the seeds of 30 species belonging to 14 sections of Astragalus from India has been examined applying scanning electron microscopy (SEM) along with light microscopy (LM) to evaluate their role in identification and classification. Attention was paid to colour, shape, size and surface of seeds. The overall size of the seeds ranges from 1.5–3.2 × 0.8–2.2 mm. The shape of the seeds is cordiform, deltoid, mitiform, orbicular, ovoid and reniform. The colour of seeds varies from brown to blackish-brown to black. Papillose, reticulate, ribbed, rugulate and stellate patterns were observed on the seed coat surface (spermoderm) among different species. The study reveals that the seed coat ornamentations have evolved differently among species and do not support the subgeneric and sectional divisions of the genus. However, they add an additional feature to the individual species, which may help in identification in combination with other macro-morphological features.

Micromorphological observation of seed coat of Eucalyptus species (Myrtaceae) using scanning electron microscopy technique

Microscopy Research and Technique ◽

10.1002/jemt.23099 ◽

2018 ◽

Vol 82 (2) ◽

pp. 75-84 ◽

Cited By ~ 8

Author(s):

Muhammad Luqman ◽

Muhammad Zafar ◽

Mushtaq Ahmad ◽

Munir Ozturk ◽

Shazia Sultana ◽

...

Keyword(s):

Electron Microscopy ◽

Seed Coat ◽

Eucalyptus Species ◽

Scanning Electron Microscopy Technique ◽

Microscopy Technique ◽

Delamination Behavior of Cu-Low-k Stack Under Different Slurries

MRS Proceedings ◽

10.1557/proc-767-f7.3 ◽

2003 ◽

Vol 767 ◽

Author(s):

A. K. Sikder ◽

S. Thagella ◽

P. B. Zantye ◽

Ashok Kumar

Keyword(s):

Electron Microscopy ◽

Chemical Mechanical Polishing ◽

Wear Behavior ◽

Polished Surface ◽

Cu Metallization ◽

Wide Range ◽

Low K ◽

Delamination Behavior ◽

AbstractLower mechanical strength, reduced cohesive strength and lack of compatibility with other interconnect materials, are the major challenges involved in chemical mechanical polishing (CMP) of Cu metallization with ultra low-k materials as interlayer dielectrics. In this study we have investigated the polishing behavior of patterned Cu samples with underneath different low-k materials using two different slurries and a wide range of machine parameters. CMP micro tribometer was used to polish the samples with different rotations of platen (50 to 250 RPM) and down forces (1-6 PSI). Friction co-efficient and wear behavior were also investigated at different conditions. Optical and scanning electron microscopy was used to investigate the polished surface. It was observed that the two different Cu slurries used for polishing have marked effects on the polishing of Cu-low-k stack with respect to wear and delamination.

Dry Sliding Tribological Properties of a Hard Anodized AA6082 Aluminum Alloy

Metals ◽

10.3390/met10020207 ◽

2020 ◽

Vol 10 (2) ◽

pp. 207

Author(s):

Eleonora Santecchia ◽

Marcello Cabibbo ◽

Abdel Magid Salem Hamouda ◽

Farayi Musharavati ◽

Anton Popelka ◽

...

Keyword(s):

Electron Microscopy ◽

Wear Behavior ◽

Structure Characterization ◽

Dry Sliding Wear ◽

Dry Sliding ◽

Alumina Layer ◽

Wide Range ◽

Wear Tests ◽

The applications of aluminum and its alloys are still limited by low hardness and low wear resistance properties. Surface modifications, such anodizing and plasma electrolytic oxidation, represent a feasible way to overcome these drawbacks. In this study, discs of AA6082 were subjected to the so-called G.H.A. hard anodizing process leading to an anodized layer having a honeycomb-like structure. Samples having alumina layer thicknesses of 10, 50 and 100 μm were subjected to unidirectional dry sliding wear tests, using bearing steel and silicon nitride as counterbody materials. Surface and structure characterization of the samples were performed before and after the tribological tests, using a wide range of techniques; atomic force microscopy and scanning electron microscopy techniques were used before the wear tests. The wear scars were characterized by scanning electron microscopy, energy dispersive spectroscopy and Fourier transform infrared spectroscopy techniques. Results show that the different thickness of the anodized layer does not affect the pores dimensions but has an influence on the micrometric domains in which the pores are divided. These features coupled with the wear test conditions, show to have a strong influence on the wear behavior. The thinnest sample showed also the best performance against the ceramic counterbody.

Seed morphology and anatomy of Hypericum elegans Steph. ex Willd.

Biodiversity Research and Conservation ◽

10.2478/biorc-2014-0017 ◽

2014 ◽

Vol 35 (1) ◽

pp. 15-18

Author(s):

Piotr Szkudlarz

Keyword(s):

Electron Microscopy ◽

Eastern Europe ◽

Seed Coat ◽

Central And Eastern Europe ◽

Seed Morphology ◽

Seed Sample ◽

Cell Layers ◽

Mature Seeds ◽

Abstract Hypericum elegans is a rare perennial distributed primarily in Central and Eastern Europe. Seed morphology and anatomy in H. elegans was studied on the basis of a seed sample from its only locality in Poland. Scanning electron microscopy revealed that the seed coat of mature seeds is composed basically of 3 cell layers: epidermal, subepidermal and sclerenchymatic. They are documented graphically here.

Seed morphology of perennial taxa of Euphorbia section Pithyusa (Euphorbiaceae) in Turkey

Phytotaxa ◽

10.11646/phytotaxa.336.3.4 ◽

2018 ◽

Vol 336 (3) ◽

pp. 263

Author(s):

İLKER GENÇ ◽

ŞÜKRAN KÜLTÜR

Keyword(s):

Electron Microscopy ◽

Light Microscopy ◽

Seed Morphology ◽

Seed Shape ◽

Seed Surface ◽

Surface Ornamentation ◽

Seed Characteristics ◽

Scanning Electron ◽

Comprehensive Study

A comprehensive study based on seed morphology of perennial Euphorbia (Euphorbiaceae) sect. Pithyusa species occurring in Turkey is presented. A total of 14 species were studied. Seed characteristics were examined using scanning electron microscopy (SEM) as well as dissecting light microscopy. Significant features are: seed size, seed shape, shape of caruncle and seed surface ornamentation. Three different seed surface types (smooth, pitted, and wrinkled) were observed. Four main seed shapes (ovoid, oblong, quadrangular, and globose), as well as seven types of seed coat ornamentation (reticulate-areolate, areolate, alveolate, falsifoveate, pusticulate, colliculate and smooth) were found. The number of testa cells per 100 µm2 and also its range, from 8–12 to 57–63, are given.

Synthesis of Fe2O3/CNTs for the Fast Removal of Tetracycline from Aqueous Solutions

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.915-916.933 ◽

2014 ◽

Vol 915-916 ◽

pp. 933-941 ◽

Cited By ~ 3

Author(s):

Zhong Jie Zhang ◽

Chang Yu Lu ◽

Wei Huang ◽

Wei Sheng Guan ◽

Yue Xin Peng

Keyword(s):

Electron Microscopy ◽

Magnetic Measurements ◽

Ferrite Nanoparticles ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

Wide Range ◽

Fast Removal ◽

The effective remove to tetracycline still remains a big challenge for scientists. In this work, we used a new method for preparing functional magnetic CNTS with ferrite nanoparticles. A wide range of techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and magnetic measurements were applied to characterize the obtained Fe2O3/CNTs. Moreover, we have also studied the properties of adsorbent to tetracycline. In addition, we have found that the Fe2O3/CNTs are better reusable adsorbent than other traditional adsorbents by magnetic separation recycling method.