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Artículos de revistas sobre el tema "Leaf specimens"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 20 de febrero de 2023

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1

Volkova, Polina A., Sof'ya A. Kasatskaya, Anna A. Boiko, and Alexey B. Shipunov. "Stability of leaf form and size during specimen preparation of herbarium specimens." Feddes Repertorium 121, no. 5-6 (December 2010): 219–25. http://dx.doi.org/10.1002/fedr.201000021.

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2

Beauvais, Marie-Pierre, Stéphanie Pellerin, Jean Dubé, and Claude Lavoie. "Herbarium specimens as tools to assess the impact of large herbivores on plant species." Botany 95, no. 2 (February 2017): 153–62. http://dx.doi.org/10.1139/cjb-2016-0206.

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Herbarium specimens can be used to reconstruct spatiotemporal changes in plant morphology caused by environmental pressures. The reliability of herbarium-derived data requires evaluation, because specimen collection is subject to biases. We used herbarium and field data to investigate the impact of large herbivore browsing on the size of a forb. White trillium (Trillium grandiflorum (Michaux) Salisbury) was studied because the impacts of white-tailed deer (Odocoileus virginianus Zimmermann) browsing on this species are well-known. A total of 692 herbarium specimens collected in Quebec (Canada)

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3

Ahlstrand, Gilbert G., and Richard J. Zeyen. "Bulk Specimen Preparation For X-Ray Microanalysis of Plant Cells." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 2 (August 12, 1990): 334–35. http://dx.doi.org/10.1017/s0424820100135277.

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Numerous plant pathological investigations have been published where pathologists determined elemental differences between diseased and healthy plant tissue using unfractured bulk specimens and energy dispersive x-ray microanalysis (EDX). In these studies effects of specimen preparation procedures were largely ignored (1). Our objective was to compare bulk specimen preparation procedures using healthy leaf epidermal (surface) cells of barley, Hordeum vulgare, (Fig. 1) to determine advantages and disadvantages of each procedure for reference to future pathological work using EDX. Three preparat

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4

Corney, David P. A., Jonathan Y. Clark, H. Lilian Tang, and Paul Wilkin. "Automatic extraction of leaf characters from herbarium specimens." TAXON 61, no. 1 (February 2012): 231–44. http://dx.doi.org/10.1002/tax.611016.

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5

Kim, Hyeree, XiaoXuan Du, Sungwook Kim, Pilun Kim, Ruchire Eranga Wijesinghe, Byoung-Ju Yun, Kyung-Min Kim, Mansik Jeon, and Jeehyun Kim. "Non-Invasive Morphological Characterization of Rice Leaf Bulliform and Aerenchyma Cellular Regions Using Low Coherence Interferometry." Applied Sciences 9, no. 10 (May 22, 2019): 2104. http://dx.doi.org/10.3390/app9102104.

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Non-invasive investigation of rice leaf specimens to characterize the morphological formation and particular structural information that is beneficial for agricultural perspective was demonstrated using a low coherence interferometric method called swept source optical coherence tomography (SS-OCT). The acquired results non-invasively revealed morphological properties of rice leaf, such as bulliform cells; aerenchyma, parenchyma, and collenchyma layer; and vascular bundle. Beside aforementioned morphologic characteristics, several leaf characteristics associated with cytological mechanisms of

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6

Kirker, Grant T., Amy Bishell, Jed Cappellazzi, Jonathan Palmer, Nathan Bechle, Patricia Lebow, and Stan Lebow. "Role of Leaf Litter in Above-Ground Wood Decay." Microorganisms 8, no. 5 (May 9, 2020): 696. http://dx.doi.org/10.3390/microorganisms8050696.

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The effects of leaf litter on moisture content and fungal decay development in above-ground wood specimens were assessed. Untreated southern pine specimens were exposed with or without leaf litter contact. Two types of leaf litter were evaluated; aged (decomposed) and young (early stages of decomposition). The moisture content of specimens was monitored, and specimens were periodically removed for visual evaluation of decay development. In addition, amplicon-based sequencing analysis of specimens and associated leaf litter was conducted at two time points. Contact with either type of leaf litt

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7

Petrulaitis, Lukas, and Zigmantas Gudžinskas. "What are We Conserving? A Case Study of Mentha longifolia and Allied Species from Lithuania." Botanica 24, no. 1 (June 1, 2018): 3–14. http://dx.doi.org/10.2478/botlit-2018-0001.

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AbstractAssessment of the conservation status of a species, first, should be based on its clearly defined taxonomic identity. Insufficient knowledge of certain taxonomic groups may lead to misidentifications, misinterpretations and become an obstacle for conservation. Mentha longifolia, listed as a protected plant species of Lithuania since 1981, belongs to a taxonomically complex group of species. The aim of this research was to examine available herbarium specimens of M. longifolia and verify their identification, specify distribution of this species in Lithuania and evaluate its conservatio

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8

Dacuan, Cecielle N., Virgilio Y. Abellana, and Hana Astrid R. Canseco. "Assessment and Evaluation of Blended Cement Using Bamboo Leaf Ash BLASH Against Corrosion." Civil Engineering Journal 7, no. 6 (June 1, 2021): 1015–35. http://dx.doi.org/10.28991/cej-2021-03091707.

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Concrete provides a high degree of protection against corrosion of embedded steel reinforcement. Owing to the harsh environmental conditions and the presence of aggressive elements from the marine environment, deteriorating corrosion affects the durability of reinforced concrete structures. This study evaluated the effectiveness of bamboo leaf ash BLASH as a supplementary cementing material or admixture with Portland cement to improve the durability of reinforced concrete structures. Specimens of 0, 10, 15, and 20% BLASH mixtures were prepared using 16, 20, and 25 mm steel reinforcements. A to

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9

Koponen, T. "Taxonomic Results of the BRYOTROP Expedition to Zaire and Rwanda 21. Mniaceae." Bryophyte Diversity and Evolution 8, no. 1 (December 31, 1993): 189. http://dx.doi.org/10.11646/bde.8.1.22.

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The specimen represents a rather typical African form of this taxon. The marginal teeth of the leaf are small and the leaf cells near isodiametric, but on the basis of the clearly differentiated juxtacostal cells, the specimen belongs to var. rhynchophyrum. Two other tropical African species are Plagiomnium cuspidatum (Hedw.) T. Kop. and P. undulatum (Hedw.) T. Kop. which differ by having an acute or cuspidate leaf apex, which in P. rhynchophorum tends to be emarginate and apiculate, and having sharper and larger projecting marginal teeth on their leaves. The distribution of P. rhynchophyrum i

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10

Kozlov, Mikhail V., Irina V. Sokolova, Vitali Zverev, and Elena L. Zvereva. "Changes in plant collection practices from the 16th to 21st centuries: implications for the use of herbarium specimens in global change research." Annals of Botany 127, no. 7 (February 9, 2021): 865–73. http://dx.doi.org/10.1093/aob/mcab016.

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Abstract Background and Aims Herbaria were recently advertised as reliable sources of information regarding historical changes in plant traits and biotic interactions. To justify the use of herbaria in global change research, we asked whether the characteristics of herbarium specimens have changed during the past centuries and whether these changes were due to shifts in plant collection practices. Methods We measured nine characteristics from 515 herbarium specimens of common European trees and large shrubs collected from 1558 to 2016. We asked botanists to rank these specimens by their scient

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11

Hill, RS, and MS Pole. "Leaf and shoot morphology of extant Afrocarpus, Nageia and Retrophyllum (Podocarpaceae) species, and species with similar leaf arrangement, from tertiary sediments in Australia." Australian Systematic Botany 5, no. 3 (1992): 337. http://dx.doi.org/10.1071/sb9920337.

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A cuticular micromorphological study confirms the separate generic status of Afrocarpus, Nageia and Retrophyllum and increases the number of available diagnostic characters. A re-investigation of fossil species previously assigned to this complex demonstrates that in all cases the generic designation was incorrect. Decussocarpus maslinensis from Eocene sediments at Mash Bay is transferred to the new genus Willungia; specimens from Eocene sediments at Anglesea referred to Decussocarpus brownei are transferred to Smithtonia victoriensis; Prumnopitys lanceolata and specimens assigned to P. aff. t

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12

Annisa, Mutiara, Puteri Aulia Rizqi Kanina, Nur Liyana Binti Hamid, and Archadian Nuryanti. "<strong>Effectiveness of green tea, bay leaf, and lime peel extracts as toothpastes active agents for extrinsic stain removal on teeth, artificial teeth, and denture base</strong>." Padjadjaran Journal of Dentistry 34, no. 1 (April 9, 2022): 47. http://dx.doi.org/10.24198/pjd.vol34no1.32236.

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Introduction: Tea consumption causes extrinsic stain formation on teeth and denture surfaces, affecting personal appearance. Herbal plants extract such as green tea, bay leaf, and lime peel are potentially active agents for extrinsic stain removal. This study aimed to analyse the effectiveness of green tea, bay leaf, and lime peel extracts as toothpaste active agents for extrinsic stain removal on teeth, artificial teeth, and denture base. Methods: Twenty-five post-extracted human permanent central incisors, 25 artificial teeth, and 25 heat polymerised acrylic resin denture base (20x20x10mm) w

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13

Mustapa, Mohammad Sukri, Saiful Din Sabdin, Abdul Latif M. Tobi, Md Saidin Wahab, Mohd Radzi Mohamed Yunus, and Yusri Yusof. "The Effects of Heat and Compression on Moisture Content and Water Absorption of PALF/Sugarcane Bagasse Composition in Disposable Plate Production." Applied Mechanics and Materials 773-774 (July 2015): 272–76. http://dx.doi.org/10.4028/www.scientific.net/amm.773-774.272.

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This paper presents the results of heat and compression effects on moisture content and water absorption properties in the manufacturing of disposable plate made from Pineapple Leaf Fiber-based material (PALF). The plate was made of PALF and sugarcane bagasse waste as an alternative to polystyrenes, designed to promote the green technology effort on food packaging material. Two different specimens were produced with different compositions of PALF/sugarcane bagasse series N2T8 ( 20 wt% of Pineapple leaf fiber and 80 wt% of sugarcane bagasse ) and series N8T2 ( 80 wt% of Pineapple leaf fiber and

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14

Kinoshita, Natsuko, Aki Sugita, Barry Lustig, Shigeyuki Betsuyaku, Tetsu Fujikawa, and Tatsuji Morishita. "Automating measurements of fluorescent signals in freely moving plant leaf specimens." Plant Biotechnology 36, no. 1 (March 25, 2019): 7–11. http://dx.doi.org/10.5511/plantbiotechnology.18.1002a.

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15

Kolesnikov, L. E., E. A. Vlasova, and Yu R. Sablina. "Monitoring the development of leaf rust pathogen on common wheat specimens." Russian Agricultural Sciences 34, no. 4 (August 2008): 230–33. http://dx.doi.org/10.3103/s106836740804006x.

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16

CUMMING, ROYCE T., JING V. LEONG, and DAVID J. LOHMAN. "Leaf insects from Luzon, Philippines, with descriptions of four new species, the new genus Pseudomicrophyllium, and redescription of Phyllium (Phyllium) geryon Gray, 1843, (Phasmida: Phylliidae)." Zootaxa 4365, no. 2 (December 17, 2017): 101. http://dx.doi.org/10.11646/zootaxa.4365.2.1.

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Examination of unidentified Phylliidae specimens revealed a number of undescribed species from the island of Luzon, Philippines. Morphological and molecular study of specimens from the obscure phasmid genus Microphyllium Zompro, 2001, revealed a new species, which we describe as Microphyllium haskelli Cumming sp. nov.. It is here described and differentiated from the two other species in the genus, both currently only known from adults of a single sex. Pseudomicrophyllium Cumming gen. nov. is described as a new genus within Phylliidae with the type species Pseudomicrophyllium faulkneri Cumming

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17

Mustapa, Mohammad Sukri, Saiful Din Sabdin, Erween Abdul Rahim, Md Saidin Wahab, and Yusri Yusof. "Effect of Heat Compression on the Tensile Strength of PALF/Sugarcane Bagasse for Disposable Plate." Applied Mechanics and Materials 660 (October 2014): 362–66. http://dx.doi.org/10.4028/www.scientific.net/amm.660.362.

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This paper presents the results of heat compression effect on tensile properties in manufacturing process of disposable plate from Pineapple Leaf Fibers (PALF) based material. The plate was made of PALF and sugarcane bagasse waste as alternatif to polystyrenes to promote the green technology efford on food packaging material. Two different spesimens were produced with different composition of PALF/sugarcane bagasse, N2T8 (20% Pineapple leaf fiber and 80% sugarcane bagasse and N8T2 (80% pineapple leaf fiber and 20% sugarcane bagasse). The specimens were produced on a hot press machine at differ

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18

HAKIMARA, MAHSA, KAMBIZ MINAEI, SABER SADEGHI, and LAURENCE MOUND. "A new species of Liophloeothrips (Thysanoptera, Phlaeothripidae) from leaf litter from Iran." Zootaxa 4571, no. 1 (March 25, 2019): 138. http://dx.doi.org/10.11646/zootaxa.4571.1.10.

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Of the 16 species listed in the genus Liophloeothrips (ThripsWiki 2018), 13 are known only from India, and all of these are phytophagous with some inducing galls in various plant families (Tyagi & Kumar 2011). However, the biology of the type species, L. glaber, as well as that of the other two species, L. hungaricus and L. pulchrisetis, remains in doubt. Each of these three species is from Europe, with L. pulchrisetis known from a single female, L. glaber from two specimens, and hungaricus recorded from Hungary, Finland and Iran on a very few individuals (Minaei & Mound 2014). The rec

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19

Ellis, R. P. "Leaf anatomy of the South African Danthonieae (Poaceae). XIV. Pentameris dregeana." Bothalia 16, no. 2 (October 28, 1986): 235–41. http://dx.doi.org/10.4102/abc.v16i2.1097.

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Transverse sections and abaxial epidermal scrapes of leaf blades of Pentameris dregeana Stapf, both of herbarium specimens and of freshly fixed material, were examined by light microscopy. The anatomical structure was found to be basically uniform in a representative sample. A few somewhat atypical specimens, how'ever, showed epidermal similarities with Pentaschistis colorata (Steud.) Stapf. A comparison with other danthonoid grasses revealed some specimens identified as Pentaschistis colorata var. polytricha Stapf which resemble Pentameris dregeana very closely in leaf anatomy. A definite gra

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20

Jordan, Gregory J. "Uncertainty in Palaeoclimatic Reconstructions Based on Leaf Physiognomy." Australian Journal of Botany 45, no. 3 (1997): 527. http://dx.doi.org/10.1071/bt96035.

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There are several methods of predicting terrestrial palaeoclimates from the size and shape of fossil leaves (foliar physiognomy). The assumptions and sources of uncertainty of these methods are considered and used to determine the true uncertainty. Their ability to predict mean annual temperature (MAT) is poor. The approximate standard errors for samples of living vegetation in North America are in the range of 1.7˚C to 2.5˚C, but the true uncertainty for fossil samples is higher. Specimens with very different physiognomy to typical specimens in the model have higher uncertainties. Besides the

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21

Guerin, Greg R., Haixia Wen, and Andrew J. Lowe. "Leaf morphology shift linked to climate change." Biology Letters 8, no. 5 (July 4, 2012): 882–86. http://dx.doi.org/10.1098/rsbl.2012.0458.

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Climate change is driving adaptive shifts within species, but research on plants has been focused on phenology. Leaf morphology has demonstrated links with climate and varies within species along climate gradients. We predicted that, given within-species variation along a climate gradient, a morphological shift should have occurred over time due to climate change. We tested this prediction, taking advantage of latitudinal and altitudinal variations within the Adelaide Geosyncline region, South Australia, historical herbarium specimens ( n = 255) and field sampling ( n = 274). Leaf width in the

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22

Wilf, Peter, Shengping Zhang, Sharat Chikkerur, Stefan A. Little, Scott L. Wing, and Thomas Serre. "Computer vision cracks the leaf code." Proceedings of the National Academy of Sciences 113, no. 12 (March 7, 2016): 3305–10. http://dx.doi.org/10.1073/pnas.1524473113.

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Understanding the extremely variable, complex shape and venation characters of angiosperm leaves is one of the most challenging problems in botany. Machine learning offers opportunities to analyze large numbers of specimens, to discover novel leaf features of angiosperm clades that may have phylogenetic significance, and to use those characters to classify unknowns. Previous computer vision approaches have primarily focused on leaf identification at the species level. It remains an open question whether learning and classification are possible among major evolutionary groups such as families a

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23

Franco, Celeste de Jesus Pereira, Oberdan Oliveira Ferreira, Ângelo Antônio Barbosa de Moraes, Everton Luiz Pompeu Varela, Lidiane Diniz do Nascimento, Sandro Percário, Mozaniel Santana de Oliveira, and Eloisa Helena de Aguiar Andrade. "Chemical Composition and Antioxidant Activity of Essential Oils from Eugenia patrisii Vahl, E. punicifolia (Kunth) DC., and Myrcia tomentosa (Aubl.) DC., Leaf of Family Myrtaceae." Molecules 26, no. 11 (May 29, 2021): 3292. http://dx.doi.org/10.3390/molecules26113292.

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Essential oils (EOs) were extracted from Eugenia patrisii, E. punicifolia, and Myrcia tomentosa, specimens A and B, using hydrodistillation. Gas chromatography coupled with mass spectrometry (GC/MS) was used to identify the volatile constituents present, and the antioxidant capacity of EOs was determined using diphenylpicryl-hydrazyl (DPPH) and trolox equivalent antioxidant capacity (TEAC) assays. For E. patrisii, germacrene D (20.03%), bicyclogermacrene (11.82%), and (E)-caryophyllene (11.04%) were identified as the major constituents of the EOs extracted from specimen A, whereas specimen B p

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24

Oza, Kavi K., Rinku J. Desai, and Vinay M. Raole*. "Digital Morphometrics: A Tool for Leaf Morpho-Taxonomical Studies." Indian Journal of Botany 1, no. 2 (October 10, 2021): 1–7. http://dx.doi.org/10.35940/ijb.b2001.101221.

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Leaves are most important part of the plant and can be used for the identification of a taxon. An appropriate understanding of leaf development in terms of shape and responsible abiotic factors is necessary for improvement in plant. Leaf shape variation could be evaluated successfully, and the symmetrical and asymmetrical elements of the overall shape variation could be detected. The aim of the present study was to establish a quantitative analysis method of leaf shape by elliptic Fourier descriptors and principal component analysis (EF-PCA). EF-PCA describes an overall shape mathematically by

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25

Oza, Kavi K., Rinku J. Desai, and Vinay M. Raole. "Digital Morphometrics: A Tool for Leaf Morpho-Taxonomical Studies." Indian Journal of Advanced Botany 1, no. 2 (October 10, 2021): 1–7. http://dx.doi.org/10.54105/ijab.b2001.101221.

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Leaves are most important part of the plant and can be used for the identification of a taxon. An appropriate understanding of leaf development in terms of shape and responsible abiotic factors is necessary for improvement in plant. Leaf shape variation could be evaluated successfully, and the symmetrical and asymmetrical elements of the overall shape variation could be detected. The aim of the present study was to establish a quantitative analysis method of leaf shape by elliptic Fourier descriptors and principal component analysis (EF-PCA). EF-PCA describes an overall shape mathematically by

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26

Kabíček, J. "Broad Leaf Trees as Reservoirs for Phytoseiid Mites (Acari: Phytoseiidae)." Plant Protection Science 39, No. 2 (November 25, 2011): 65–69. http://dx.doi.org/10.17221/3828-pps.

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The possibility that broad leaf trees can be reservoirs for phytoseiid mites was investigated by determining their occurrence and species diversity on common deciduous tree species. No phytoseiid mites were found on Betula pendula and Populus tremula. Altogether&nbsp; 280 specimens of phytoseiids belonging to six species (Neoseiulella ace-ri, N. tiliarum, Paraseiulus soleiger, Euseius finlandicus, Phytoseius severus, Typhlodromus rhenanus) were found on Acer platanoides, Fagus sylvatica, Quercus robur and Salix caprea. Ph. severus was the dominant phytoseiid species on S. caprea, while N.

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27

Catarino, Michel F., and Jansen Zuanon. "Feeding ecology of the leaf fish Monocirrhus polyacanthus (Perciformes: Polycentridae) in a terra firme stream in the Brazilian Amazon." Neotropical Ichthyology 8, no. 1 (March 2010): 183–86. http://dx.doi.org/10.1590/s1679-62252010000100022.

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Monocirrhus polyacanthus (Polycentridae) is a remarkable leaf-mimicking fish that inhabits streams, lake and river margins along the Amazon basin. Despite its obvious predatory habits and being frequently present in the international aquarium trade, little is known about its diet under natural conditions. We examined 35 specimens of leaf fish (28.5-82.0 mm SL), of which 19 had food the stomach. Thirty-three preys were found in the stomach contents, 19 of which were measured (2.0-33.0 mm total length). Up to five preys were found in the stomach contents of a single leaf fish specimen. The diet

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28

Chandra, Shaila, and K. J. Singh. "On Euryphyllum Feistmantel and its epidermal features." Journal of Palaeosciences 45 (December 31, 1996): 7–14. http://dx.doi.org/10.54991/jop.1996.1213.

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The leaf form genus Euryphyllum Feistmantel 1879 is known by two species, viz., E. whittianum Feistmantel 1879 E. obovatum Maithy 1970 from the Karharbari bed of Giridih Coalfield, India. Both these species are based on the external morphology only. For the first time epidermal features of this leaf are reported from the Early Permian beds of Talchir Coalfield and a new species– E. maithyi has been established. Besides, three specimens assignable to the type species of the genus E. whittianum are also recorded. All the specimens hitherto described and or transferred under this leaf genus have

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Everill, Peter H., Richard B. Primack, Elizabeth R. Ellwood, and Eli K. Melaas. "Determining past leaf-out times of New England's deciduous forests from herbarium specimens." American Journal of Botany 101, no. 8 (August 2014): 1293–300. http://dx.doi.org/10.3732/ajb.1400045.

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STUART, BRYAN L., and UWE FRITZ. "Historical DNA from museum type specimens clarifies diversity of Asian leaf turtles (Cyclemys)." Biological Journal of the Linnean Society 94, no. 1 (April 29, 2008): 131–41. http://dx.doi.org/10.1111/j.1095-8312.2008.00966.x.

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Evarte-Bundere, Gunta, and Pēteris Evarts-Bunders. "Use of leaf morphometric parameters for identification of the most common cultivated intraspecific taxa of Tilia platyphyllos." Botanica Lithuanica 19, no. 2 (December 1, 2013): 83–90. http://dx.doi.org/10.2478/botlit-2013-0011.

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Abstract Evarte-Bundere G., Evarts-Bunders P., 2013: Use of leaf morphometric parameters for identification of the most common cultivated intraspecific taxa of Tilia platyphyllos [Morfometrinių požymių panaudojimas dažniausiems kultūriniams Tilia platyphyllos vidurūšiniams taksonams apibūdinti]. - Bot. Lith., 19(2): 83-90. To determine variation of the most important morphological parameters of Tilia platyphyllos Scop., we studied four most frequently found in Latvia taxa: T. platyphyllos subsp. platyphyllos, T. platyphyllos subsp. cordifolia (Besser) C.K.Schneid., T. platyphyllos ‘Rubra’, T.

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32

RÊGO, MÉRCIA DE CARVALHO ALMEIDA, ANGELA CELIS DE ALMEIDA LOPES, ROSELI FARIAS MELO DE BARROS, ALONSO MOTA LAMAS, MARCONES FERREIRA COSTA, and REGINA LUCIA FERREIRA-GOMES. "MORPHOLOGICAL CHARACTERIZATION AND GENETIC DIVERSITY IN ORNAMENTAL SPECIMENS OF THE GENUS SANSEVIERIA." Revista Caatinga 33, no. 4 (October 2020): 985–92. http://dx.doi.org/10.1590/1983-21252020v33n413rc.

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ABSTRACT The aim of this study was to characterize and estimate genetic divergence among twelve specimens of the Sansevieria genus from the collection of the Universidade Federal do Piauí (UFPI). A completely randomized experimental design was used with three replicates, and the plot consisted of four plants. In morphological characterization, qualitative and quantitative descriptors of leaves were evaluated. Genetic divergence among the specimens was determined by the Tocher clustering method and the hierarchical UPGMA. There is genetic variation among specimens evaluated, which was also expr

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Puspitasari, Dewi, Maharani Laillyza Apriasari, Dewi Rahayu, and Priyawan Rachmadi. "THE EFFECT OF Musa acuminata AND Ocimum basilicum MIXED EXTRACTS TO THE SURFACE HARDNESS OF BIOACTIVE COMPOSITE RESIN." Dentino : Jurnal Kedokteran Gigi 5, no. 2 (August 15, 2020): 172. http://dx.doi.org/10.20527/dentino.v5i2.8970.

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ABSTRACTBackgrounds: The use of mouthwash daily may influence the mechanical properties of bioactive composite resin as a dental restoration, one of the mechanical properties is surface hardness. Herbal mouthwash can be used to minimize the side effect of mouthwash that contain alcohol. Mauli banana stem and basil leaf extracts can be produced into herbal mouthwash. Methods: Thirty specimens (10mm diameter x 2mm thick; n=5/group) bioactive composite resins were immersed in a mixed solution of Mauli banana and basil leaf extracts with concentration of 25%, 50%, 75 %%, 100%, the control group of

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Oh, Se Doo, Won Wook Jung, Dong Ho Bae, and Young Ze Lee. "Friction and Wear Characteristics for Automotive Leaf Spring Materials due to the Influence of the Residual Stress." Key Engineering Materials 297-300 (November 2005): 1388–94. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.1388.

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In this paper, the effects of the residual stresses on the life of structural engineering components were investigated to predict the wear-life. Residual stresses are usually created by the surface treatment, such as shot peening or deep rolling. The objective of the experimental investigation was focused on the influence of friction and wear characteristics due to the residual stress under dry sliding condition and the measurement of the interleaf friction. Test specimens were made of SUP9, the leaf spring material. The residual stresses were created on their surface by shot peening treatment

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Bergo, Maria C. J., Tereza C. M. Pastore, Vera T. R. Coradin, Alex C. Wiedenhoeft, and Jez W. B. Braga. "NIRS IDENTIFICATION OF SWIETENIA MACROPHYLLA IS ROBUST ACROSS SPECIMENS FROM 27 COUNTRIES." IAWA Journal 37, no. 3 (September 7, 2016): 420–30. http://dx.doi.org/10.1163/22941932-20160144.

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Big-leaf mahogany is the world’s most valuable widely traded tropical timber species and Near Infrared Spectroscopy (NIRS) has been applied as a tool for discriminating its wood from similar species using multivariate analysis. In this study four look-alike timbers of Swietenia macrophylla (mahogany or big-leaf mahogany), Carapa guianensis (crabwood), Cedrela odorata (cedar or cedro) and Micropholis melinoniana (curupixá) have been successfully discriminated using NIRS and Partial Least Squares for Discriminant Analysis using solid block and milled samples. Species identification models identi

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Ehleringer, James R., John F. Casale, Janet E. Barnette, Xiaomei Xu, Michael J. Lott, and Janet Hurley. "14C Calibration Curves for Modern Plant Material from Tropical Regions of South America." Radiocarbon 53, no. 4 (2011): 585–94. http://dx.doi.org/10.1017/s0033822200039060.

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Two Δ14C calibration curves have been produced that allow determination of the statistical average age of coca leaf and cocaine base specimens produced for the time period 1979–2009. These calibration curves are based on field collections of specimens in Bolivia, Colombia, Ecuador, and Peru. The coca leaf F14C and Δ14C calibration curves can be used to predict the ages of botanical tissues collected in tropical South America and possibly extended to other tropical locations. The cocaine F14C and Δ14C calibration curves can be used to predict the ages of seized cocaine specimens. Because the Δ1

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HE, XIAOLAN, and YU SUN. "Rare sporophyte found in Europe for Herbertus sendtneri with a range expansion to Africa and Malesia." Phytotaxa 324, no. 1 (October 6, 2017): 42. http://dx.doi.org/10.11646/phytotaxa.324.1.2.

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The sporophytes of the genus Herbertus are rare or completely absent in some areas. The first discovery of the sporophyte of Herbertus in Europe, on H. sendtneri from a herbarium specimen collected in Austria in 1851, is reported here. We report that finely papillose spores characterize Herbertus species which have originated in the Northern Hemisphere, whereas the spores of the species which have originated in the Southern Hemisphere are tuberculate or shortly spinulose. Based on morphological studies of over 600 herbarium specimens of Herbertus, supported by previously published molecular ph

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MOHAMEDSAID, MOHAMED S. "Aplosonyx amorphophallus, an interesting new species of Galerucinae from Timor, Indonesia (Coleoptera: Chrysomelidae)." Zootaxa 1910, no. 1 (October 20, 2008): 53–58. http://dx.doi.org/10.11646/zootaxa.1910.1.5.

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Aplosonyx amorphophallus, a new species of chrysomelid beetle of the subfamily Galerucinae is described and illustrated from Timor, Indonesia. An aroid plant, Amorphophallus muelleri Blume, is identified as the host plant. Live specimens of the new species are shiny bright yellow, whereas dried preserved specimens are dull, brownish, or yellowish. The feeding behaviour of the new species differs from other Aplosonyx that have been reported, where it feed from the leaf margin resulting semicircular cuts, not as round holes on the leaf of the host plant. Information on bionomics is provided.

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Milković, Matija, Mihajlo Stanković, Tatjana Gogić, Sara Rodić, and Aleksandra Konjević. "The first record on Xanthium strumarium and Helianthus decapetalus as host plants of ragweed leaf beetle (Ophraella communa L.) in Serbia." Biljni lekar 50, no. 1 (2022): 40–47. http://dx.doi.org/10.5937/biljlek2201040m.

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So far, the confirmed host plants of the ragweed leaf beetle in Serbia belonged to the genus Ambrosia (Ambrosia artemisifolia, A. trifida). At one locality Tošin bunar (Bežanija, Belgrade, Serbia) the first case of Ophraella communa adults feeding on leaves of Xanthium strumarium and Helianthus decapetalus was recorded in Serbia. The number of specimens of O. communa on H. decapetalus was ranging between 1 and 18 specimens per plant, while on X. strumarium it was up to 10 adult specimens. While the plants of ragweed had up to 100% damaged leaves, the leaves of X. strumarium and H. decapetalus

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Deranja, Maks, Niko Kasalo, Karmela Adžić, Damjan Franjević, and Josip Skejo. "Lepocranus and Valalyllum gen. nov. (Orthoptera, Tetrigidae, Cladonotinae), endangered Malagasy dead-leaf-like grasshoppers." ZooKeys 1109 (July 1, 2022): 1–15. http://dx.doi.org/10.3897/zookeys.1109.85565.

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Only two leaf-like pygmy grasshopper species and specimens are known from Madagascar: the Leatherback Pygmy Grasshopper (Lepocranus fuscus Devriese, 1991) —which has a relatively low median carina of the pronotum; and the Malagasy Litterhopper (Valalyllum foliumgen. et. sp. nov.), herein described — which has a high median carina. Lepocranus fuscus is known from the rainforests around Tampolo, Manakambahiny, and Mahavelona (Foulpointe). The new taxon, Valalyllum foliumgen. et. sp. nov. is known only from the Belanono forest. Both species inhabit northeastern Madagascar. The new species could b

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XU, DONG-XIAN, and QUAN-RU LIU. "Lectotypification of Spiraea yunnanensis Franchet var. siccanea W. W. Smith (Rosaceae)." Phytotaxa 267, no. 4 (July 13, 2016): 289. http://dx.doi.org/10.11646/phytotaxa.267.4.5.

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Spiraea yunnanensis Franchet (1890: 200) var. siccanea W. W. Smith (1917: 69) was described on the basis of two collections, G. Forrest 9912 and 9972, from Yunnan province, China, but without indicating the type. These specimens should be treated as syntypes in accordance with Article 9.5 of the ICN (McNeill et al. 2012). Rehder (1933: 205) treated it as a distinct species and considered it could be easily distinguished from S. yunnanensis by the leaf blades being adaxially glabrous (vs. pilose) and abaxially sparsely pilose (vs. densely white tomentose). Although this treatment is accepted by

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LI, QIANSHENG, JIE ZHANG, and ALLEN COOMBES. "Quercus lineata (Fagaceae): new distribution records from China and Vietnam and its leaf anatomical features." Phytotaxa 266, no. 3 (June 24, 2016): 226. http://dx.doi.org/10.11646/phytotaxa.266.3.7.

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Quercus lineata is native to Malaysia and Indonesia. During our studies on herbarium collections and field collections, two new distribution records of Q. lineata were found in Hainan island, South China and Central Vietnam. All the key diagnostic features of the specimens from China and Vietnam were consistent with the specimens collected from Malaysia. The leaf anatomical features of the populations of different regions were compared. We also addressed the conservation status and biogeographic implications of the distribution of Q. lineata.

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Aras, Sümer, Ahmet Duran, and Gülay Yenilmez. "Isolation of DNA for RAPD analysis from dry leaf material of someHesperis L. specimens." Plant Molecular Biology Reporter 21, no. 4 (December 2003): 461–62. http://dx.doi.org/10.1007/bf02772597.

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Li, Yaoqi, Dongting Zou, Nawal Shrestha, Xiaoting Xu, Qinggang Wang, Wen Jia, and Zhiheng Wang. "Spatiotemporal variation in leaf size and shape in response to climate." Journal of Plant Ecology 13, no. 1 (December 2, 2019): 87–96. http://dx.doi.org/10.1093/jpe/rtz053.

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Abstract Aims Morphological variation of leaves is a key indicator of plant response to climatic change. Leaf size and shape are associated with carbon, water and energy exchange of plants with their environment. However, whether and how leaf size and shape responded to climate change over the past decades remains poorly studied. Moreover, many studies have only explored inter- but not intraspecific variation in leaf size and shape across space and time. Methods We collected &gt;6000 herbarium specimens spanning 98 years (1910–2008) in China for seven representative dicot species and measu

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Loganathan, T. G., R. Krishna Murthy, and Chandrasekaran Kesavan. "Effect of Cyclic Loading Frequency on Flexural Modulus of GFRP Laminates with Resin Rich Intermediate Layers." Applied Mechanics and Materials 787 (August 2015): 543–47. http://dx.doi.org/10.4028/www.scientific.net/amm.787.543.

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The flexural modulus of composite laminates subjected to cyclic loads of varying cycle periods are experimentally investigated in this work. GFRP composite laminate specimen of configuration 0/R/0/0/0, 0/R/30/60/0, 0/R/90/90/0 and 0/R/45/-45/0 are prepared by hand lay-up technique with a uniquely processed resin-rich intermediate layer for the testing. Specimens are exposed to constant amplitude cyclic loading of frequencies 4.6 Hz and 8.6 Hz. A cantilever configuration of specimen with cyclic tip loading is considered to simulate the conditions of a leaf of a laminated automobile leaf spring.

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TUNGMUNNITHUM, DUANGJAI, THAWEESAKDI BOONKERD, SIRIPORN ZUNGSONTIPORN, and NORIO TANAKA. "Morphological variations among populations of Monochoria vaginalis s.l. (Pontederiaceae) in Thailand." Phytotaxa 268, no. 1 (July 15, 2016): 57. http://dx.doi.org/10.11646/phytotaxa.268.1.4.

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Monochoria vaginalis s.l. is an annual aquatic herb belonging to the family Pontederiaceae and having an extensive distribution in tropical and subtropical Asia, Africa, and Australia. The taxon is extremely variable and morphologically complicated. In Thailand, it is recognized as a monotypic species but displays great variations not only in vegetative but also in reproductive structures. Because of these variations, its taxonomic status and species boundary remain uncertain. Morphological investigation was conducted on 244 living specimens of M. vaginalis s.l. covering the current distributi

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Adwan, Rania, Ekhlas Edan Kader, and Lutfi Yousuf Zedan. "Experimental analysis of composite materials leaf spring used in automotive." Diyala Journal of Engineering Sciences 14, no. 4 (December 6, 2021): 26–36. http://dx.doi.org/10.24237/djes.2021.14403.

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product modifications or replacement of old products with new and improved material items. Vehicle suspension systems are another area where these developments are carried out on a regular basis. More efforts are being made to improve the user's comfort. Appropriate combination of comfort riding attributes and economics in leaf spring production becomes an evident requirement. Many changes have been made to the suspension system throughout time in order to enhance it. Some of the most recent suspension system innovations include the invention of the parabolic leaf spring and the usage of compo

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MINAEI, KAMBIZ, MAHMOOD ALICHI, LIDA FEKRAT, MARYAM ALEOSFOOR, and JALIL ALAVI. "Leaf-feeding Mycterothrips: two new species from southern Iran (Thysanoptera: Thripidae)." Zootaxa 4243, no. 1 (March 13, 2017): 195. http://dx.doi.org/10.11646/zootaxa.4243.1.11.

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Mycterothrips doostii sp. n. and Mycterothrips zagrosi sp. n. are described and illustrated from Fars province, southern Iran, on the basis of specimens collected on green leaves of Juglans regia and Amygdalus scoparia respectively. M. doostii is closely related to M. aureus and M. weii, whereas M. zagrosi resembles M. sanubari and M. glycines in color and structure.

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Collins, Timothy L., Rose L. Andrew, Ben W. Greatrex, and Jeremy J. Bruhl. "Reliable analysis of volatile compounds from small samples of Eucalyptus magnificata (Myrtaceae)." Australian Systematic Botany 31, no. 3 (2018): 232. http://dx.doi.org/10.1071/sb18005.

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Phytochemistry is a source of data for plant systematics. This tool has much more value if herbarium specimens can be used without major damage and if results are comparable with fresh samples. A modified method for the solvent extraction of eucalypt leaf oils for phytochemical analysis and chemotaxonomy studies, including historical herbarium samples by gas chromatography–mass spectrometry (GC-MS), has been statistically assessed using Eucalyptus magnificata L.A.S.Johnson &amp; K.D.Hill leaves. Leaf sample size was reduced by a factor of 250 to minimise damage to herbarium specimens, redu

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Jaworska, Maria. "Some Remarks on the Ivy Leaf Lamp Found in Ptolemais." Studies in Ancient Art and Civilisation 22 (January 31, 2019): 191–201. http://dx.doi.org/10.12797/saac.22.2018.22.08.

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During the Polish excavations in Ptolemais (Libya), a unique terracotta lamp top of the Cretan Ivy Leaf type was found. It is one of only few known specimens of that kind found on the site. The article provides a brief discussion on the Cretan influences seen in the lychnological material found in Ptolemais. It also draws attention to the problem of studying the relations between the two parts of the Roman province Crete and Cyrenaica.

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