A Simple Dry Sectioning Method for Obtaining Whole-Seed-Sized Resin Section and Its Applications

10.3791/61822 ◽  
2021 ◽  
Author(s):  
Jiajing Qiu ◽  
Yinhui Ren ◽  
Lingxiao Zhao ◽  
Biao Zhang ◽  
Cunxu Wei
Keyword(s):  
Sectioning Method ◽  
Whole Seed

Deposited emulsion particles in the pores of aluminum oxide film

1978 ◽  
Vol 36 (1) ◽  
pp. 450-451
Author(s):  
Michio Ashida ◽  
Yasukiyo Ueda
Keyword(s):  
Oxide Film ◽  
Acid Solution ◽  
Barrier Layer ◽  
Colloidal Particles ◽  
Oxalic Acid Solution ◽  
Anodic Oxide ◽  
Anodic Oxide Film ◽  
Carbon Replica ◽  
Sectioning Method ◽  
Thin Sectioning

An anodic oxide film is formed on aluminum in an acidic elecrolyte during anodizing. The structure of the oxide film was observed directly by carbon replica method(l) and ultra-thin sectioning method(2). The oxide film consists of barrier layer and porous layer constructed with fine hexagonal cellular structure. The diameter of micro pores and the thickness of barrier layer depend on the applying voltage and electrolyte. Because the dimension of the pore corresponds to that of colloidal particles, many metals deposit in the pores. When the oxide film is treated as anode in emulsion of polyelectrolyte, the emulsion particles migrate onto the film and deposit on it. We investigated the behavior of the emulsion particles during electrodeposition.Aluminum foils (99.3%) were anodized in either 0.25M oxalic acid solution at 30°C or 3M sulfuric acid solution at 20°C. After washing with distilled water, the oxide films used as anode were coated with emulsion particles by applying voltage of 200V and then they were cured at 190°C for 30 minutes.

Seed dormancy and germination requirements in Angelica palustris (Besser) Hofm., a critically endangered plant

2018 ◽  
Vol 44 (4) ◽  
pp. 605-611
Author(s):  
Anca Manole ◽  
Cristian Banciu
Keyword(s):  
Endangered Plant ◽  
Seed Length ◽  
Maturation Period ◽  
Morphophysiological Dormancy ◽  
Whole Seed ◽  
Air Cavities ◽  
Germination Indices ◽  
Essential Oil Production ◽  
Germination Requirements ◽  
Seed Dormancy And Germination

The phenology of Angelica palustris seeds including maturation, germination requirements, and dormancy class, is still unknown. In opposite to the results reported from other species of Angelica, present findings showed that A. palustris produced seeds with embryo underdeveloped (the ratio between the embryo and the whole seed length was between 0.19 and 0.12) and physiologically dormant which corresponded to Morphophysiological Dormancy class. Dormancy breakdown requires a post maturation period (at least 30 days) at 18 - 20ºC for a complete embryo development, and also up to 30 days of cold stratification at 4°C. The best germination indices were obtained when fruit was removed. Germination energy (Ge) was achieved within 19 days after imbibition and was 25.8 + 0.03 and germination per cent (Gp) was achieved within 28 days and was 64.7 + 0.14. Fruit structure (lateral wings with air cavities) and physiology (essential oil production) are adaptations to facilitate seed dispersal and dormancy/germination balance.

Effects of developmental status and dehydration rate on characteristics of water and desiccation-sensitivity in recalcitrant seeds of Camellia sinensis

1993 ◽  
Vol 3 (3) ◽  
pp. 155-166 ◽  
Author(s):  
Patricia Berjak ◽  
Christina W. Vertucci ◽  
N. W. Pammenter
Keyword(s):  
Camellia Sinensis ◽  
Developmental Stages ◽  
Scanning Calorimetry ◽  
Tissue Water ◽  
Embryonic Axes ◽  
Freezable Water ◽  
Desiccation Sensitivity ◽  
Accumulation Phase ◽  
Whole Seed ◽  
Water Contents

AbstractThe effect of rate of dehydration was assessed for embryonic axes from mature seeds of Camellia sinensis and the desiccation sensitivity of axes of different developmental stages was estimated using electrolyte leakage. Rapidly (flash) dried excised axes suffered desiccation damage at lower water contents (0.4 g H2O (g DW)−1) than axes dried more slowly in the whole seed (0.9 g H2O (g DW)−1). It is possible that flash drying of isolated axes imposes a stasis on deteriorative reactions that does not occur during slower dehydration. Differential scanning calorimetry (DSC) of the axes indicated that the enthalpy of the melting and the amount of non-freezable water were similar, irrespective of the drying rate.Very immature axes that had completed morphogenesis and histodifferentiation only were more sensitive to desiccation (damage at 0.7 g H2O (g DW)−1) than mature axes or axes that were in the growth and reserve accumulation phase (damage at 0.4 g H2O (g DW)−1). As axes developed from maturity to germination, their threshold desiccation sensitivity increased to a higher level (1.3−1.4 g H2O (g DW)−1). For the very immature axes, enthalpy of the melting of tissue water was much lower, and the level of non-freezable water considerably higher, than for any other developmental stage studied.There were no marked correlations between desiccation sensitivity and thermal properties of water. Desiccation sensitivity appears to be related more to the degree of metabolic activity evidenced by ultrastructural characteristics than to the physical properties of water.

A survey of variation in the chemical composition of commercial canola meal produced in Western Canadian crushing plants

1991 ◽  
Vol 71 (2) ◽  
pp. 469-480 ◽  
Author(s):  
J. M. Bell ◽  
M. O. Keith
Keyword(s):  
Press Cake ◽  
Neutral Detergent Fiber ◽  
Canola Meal ◽  
Glucosinolate Content ◽  
Western Canada ◽  
Composition Variation ◽  
Gross Energy ◽  
The Mean ◽  
Whole Seed ◽  
Mineral Concentrations

Canola samples of whole seed, press cake and commercial meal (CM) were collected from seven canola-crushing plants in Western Canada over 4 successive weeks to assess nutrient and glucosinolate content and variability. The CM data are described in this report. The mean concentrations in CM (dry matter (DM) basis) were: in %, crude protein (N × 6.25) 41.85; ether extract 3.92; crude fiber 13.13; neutral detergent fiber 23.54; acid detergent fiber 19.09; and in MJ kg−1, gross energy 20.36. The mean mineral concentrations were, in percent, calcium 0.70; magnesium 0.57; phosphorus 1.13; potassium 1.35; sulfur 0.94; and in μg g−1, copper 6.34; iron 157; manganese 54.7; molybdenum 1.5; selenium 1.22; zinc 75.8. Total aliphatic glucosinolate concentrations (oil-free DM basis) ranged from 6.26 to 28.42 μmol g−1 for different plants, mean 16.20; indolyl glucosinolate concentrations were from 0.56 to 9.49 μmol g−1. Small and variable amounts of allyl and hydroxybenzyl glucosinolates due to weed seed contamination were found. Myrosinase activity (thioglucoside glucohydrolase EC 3.2.3.1) averaged 0.15% of that in the corresponding canola seed. Differences among crushing plants were due mainly to regional environmental factors, cultivars used and, for lysine and glucosinolates, processing conditions mainly in the desolventizer toaster stage. Key words: Canola, meal, composition, variation, regional, Western Canada

scholarly journals Impurity Diffusion in Lithium

1970 ◽  
Vol 25 (10) ◽  
pp. 1477-1483 ◽  
Author(s):  
Aadu Ott
Keyword(s):  
Thin Film ◽  
Impurity Atom ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Impurity Diffusion ◽  
Experimental Results ◽  
Vacancy Mechanism ◽  
Lithium Metal ◽  
Qualitative Explanation ◽  
Sectioning Method

Abstract The diffusion of 115mCd, 203Hg and 72Ga tracers in lithium metal has been studied, using a thin film deposition and sectioning method.The experimental results can be expressed by the following Arrhenius relations:These results, which do not agree with any established theory of impurity diffusion in a metallic lattice, are discussed together with data from previous experiments in terms of the systematics of the dependence of the diffusivity on the "ionizability" of an impurity atom in Li, and on the size of the impurity. In this way a qualitative explanation of the different diffusions rates can be obtained. The relatively large and electropositive impurities appear to diffuse mainly via a vacancy mechanism and the small and electronegative ones mainly as interstitials. The distinction substitutional-interstitial is less pronounced for very large impurities, which may also exhibit tendencies to be trapped at lattice defects.

scholarly journals Deep learning optical-sectioning method

2018 ◽  
Vol 26 (23) ◽  
pp. 30762 ◽  
Author(s):  
Xiaoyu Zhang ◽  
Yifan Chen ◽  
Kefu Ning ◽  
Can Zhou ◽  
Yutong Han ◽  
...  
Keyword(s):  
Deep Learning ◽  
Optical Sectioning ◽  
Sectioning Method

scholarly journals Determining the Best Sectioning Method and Intestinal Segment for Morphometric Analysis in Broilers

2015 ◽  
Vol 17 (2) ◽  
pp. 145-149 ◽  
Author(s):  
MS Gava ◽  
LB Moraes ◽  
D Carvalho ◽  
GZ Chitolina ◽  
LCB Fallavena ◽  
...  
Keyword(s):  
Morphometric Analysis ◽  
Intestinal Segment ◽  
Sectioning Method

scholarly journals Embryonic dormancy in seeds of Bactris gasipaes Kunth (peach-palm)

2017 ◽  
Vol 39 (2) ◽  
pp. 106-113 ◽  
Author(s):  
Patricia Nazário ◽  
Sidney Alberto do Nascimento Ferreira ◽  
Eduardo Euclydes de Lima Borges
Keyword(s):  
Latin America ◽  
The Other ◽  
Economic Interest ◽  
Bactris Gasipaes ◽  
Embryo Germination ◽  
Sand Mixture ◽  
Half Strength ◽  
Whole Seed ◽  
Amazonas State ◽  
Embryonic Dormancy

Abstract: Bactris gasipaes is a domesticated palm whose fruits are of great importance for the Amazonian people and whose heart of palm is also receiving economic interest in other brazilian and Latin America regions. The aim of this study was verify embryonic dormancy and its correlation with first cataphyll emergence in B. gasipaes seeds collected from four plants at Manaus city and four others at Coari city, both in the Amazonas state, Brazil. After extraction and cleaning, some of the seeds (4 replications of 25 per plant) were sown in a seedbed with a sawdust and sand mixture as substrate, and embryos (4 replications of 10 per plant), after extraction, were inoculated into half strength Murashige and Skoog cultures. Were used 100 seeds and 40 embryo per treatment. Whole seed and embryo germination varied between the different source plants and locations, with the greatest difference observed for the emergence of first cataphyll from seeds in the seedbed. For the most part of variables, results of seed and embryo were positively associated, namely, as one went up the other also, and vice versa. These results suggesting that, at least in part, seed dormancy in Bactris gasipaes is associated with embryonic dormancy.

Performance of Moringa oliefera as a biosorbent for chromium removal

2010 ◽  
Vol 62 (5) ◽  
pp. 1106-1111 ◽  
Author(s):  
K. Ghebremichael ◽  
N. Gebremedhin ◽  
G. Amy
Keyword(s):  
Waste Product ◽  
Chromium Concentration ◽  
Seed Processing ◽  
Metals Removal ◽  
Wastewater Systems ◽  
Seed Husk ◽  
Whole Seed ◽  
By Products ◽  
Moringa Oleifera Seed ◽  
Maximum Removal

This study investigated adsorption of chromium on to a bio-adsorbent, Moringa oleifera seed. Different by-products of the seed processing were used as adsorbents. These include: the Whole Seed Powder (WSP), the Residue after Coagulant Extraction (RaCE) and an Activated Carbon (AC) prepared from the seed husk. Adsorption studies for the removal of Cr(III) and Cr(VI) were carried out in batch experiments and the effects of adsorbent dosage, contact time, pH and initial chromium concentration were analysed. Experimental results showed that maximum removal of Cr(III) and Cr(VI) was observed at pH 7 and pH 2, respectively. The percentage removals of Cr(III) by WSP, RaCE and AC were: 97, 94 and 99.9%, respectively. And the percentage removals of Cr(VI) by RaCE and AC were 47 and 83.2%, respectively. RaCE showed similar adsorption capacity to the WSP, which indicates that it is possible to extract a coagulant and use the waste product for adsorption. By using the RaCE, residual dissolved organic carbon in the treated water was significantly reduced compared to using the WSP. These results indicate that biomaterials can be considered as potential adsorbents for heavy metals removal from water or wastewater systems.

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