scholarly journals An algorithm for determination of the morphological characteristics of honey bees

2017 ◽  
Vol 18 (2) ◽  
pp. 305-308
Author(s):  
Zlatin ZLATEV ◽  
Veselina NEDEVA
Keyword(s):  
Honey Bees ◽  
Morphological Characteristics

scholarly journals Characterization of a new natural fiber extracted from Corypha taliera fruit

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Taslima Ahmed Tamanna ◽  
Shah Alimuzzaman Belal ◽  
Mohammad Abul Hasan Shibly ◽  
Ayub Nabi Khan
Keyword(s):  
Tensile Strength ◽  
Natural Fiber ◽  
Natural Fibers ◽  
Morphological Characteristics ◽  
Synthetic Fiber ◽  
X Ray Diffraction ◽  
Reinforced Composite ◽  
Potential Alternative

AbstractThis study deals with the determination of new natural fibers extracted from the Corypha taliera fruit (CTF) and its characteristics were reported for the potential alternative of harmful synthetic fiber. The physical, chemical, mechanical, thermal, and morphological characteristics were investigated for CTF fibers. X-ray diffraction and chemical composition characterization ensured a higher amount of cellulose (55.1 wt%) content and crystallinity (62.5%) in the CTF fiber. The FTIR analysis ensured the different functional groups of cellulose, hemicellulose, and lignin present in the fiber. The Scherrer’s equation was used to determine crystallite size 1.45 nm. The mean diameter, specific density, and linear density of the CTF fiber were found (average) 131 μm, 0.86 g/cc, and 43 Tex, respectively. The maximum tensile strength was obtained 53.55 MPa for GL 20 mm and Young’s modulus 572.21 MPa for GL 30 mm. The required energy at break was recorded during the tensile strength experiment from the tensile strength tester and the average values for GL 20 mm and GL 30 mm are 0.05381 J and 0.08968 J, respectively. The thermal analysis ensured the thermal sustainability of CTF fiber up to 230 °C. Entirely the aforementioned outcomes ensured that the new CTF fiber is the expected reinforcement to the fiber-reinforced composite materials.

P–311 Association between serum sex hormones (progesterone and estradiol) and endometrial morphology during the mid-luteal phase

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
D Parvanov ◽  
R Ganeva ◽  
M Handzhiyska ◽  
N Vidolova ◽  
G Stamenov
Keyword(s):  
Scoring System ◽  
Luteal Phase ◽  
Morphological Characteristics ◽  
Serum Estradiol ◽  
Serum Progesterone ◽  
Glandular Cells ◽  
Mean Size ◽  
Stromal Edema ◽  
Estradiol Levels

Abstract Study question Is there a relationship between the serum progesterone and estradiol levels and certain morphological characteristics of human endometrium during the mid-luteal phase? Summary answer Serum progesterone is associated with the stromal edema and the abundance and size of basal vacuoles in the endometrium of women during the mid-luteal phase. What is known already Progesterone and estrogen are essential hormones that are necessary to prepare the endometrium for pregnancy. Their serum concentrations during the mid-luteal phase are important criteria for prediction of successful embryo implantation. In addition, a variety of endometrial morphological markers, such as the presence of pinopodes, subnuclear and supranuclear vacuoles, glandular secretion, and stromal edema have been applied for determination of the window of implantation and endometrial receptivity. However, the relationship between these endometrial morphological characteristics and serum levels of progesterone and estradiol is still scarcely studied. Study design, size, duration This is an observational study of 98 women, 25 to 46 years of age (mean 37 years), who had a blood sample and an endometrial biopsy during the mid-lutheal phase (LH + 7) in a natural cycle. The study was conducted between August 2020 and November 2020. Participants/materials, setting, methods Serum progesterone and estradiol were measured by electrochemiluminescence immunoassay (ECLIA) on the Cobas e411 analyser (Roche Diagnostics, Germany). The following endometrial morphological characteristics were assessed using light microscopy: (1) basal vacuoles (mean size and percentage of vacuolated glandular cells) (2) apical vacuoles (mean size and percentage of vacuolated glandular cells), (3) pinopodes (percentage of luminal epithelium covered in pinopodes), (4) glandular intraluminal secretion (6-level scoring system), (5) stromal edema (6-level scoring system). Main results and the role of chance The serum progesterone levels ranged between 0.39 and 145.3 ng/ml, with a median of 24.36 ng/ml. The serum estradiol levels varied between 26.91 and 842.89 pg/ml with a median of 124.75 pg/ml. The percentage of cells with basal vaculoles ranged from 0 to 90%, with a median of 38.57%, apical vacuoles (0–50%, 16.83%), pinopodes (0–80%, 23.87%), glandular intraluminal secretion (0–80%, 28.57%), and stromal edema (1–6, 1.42). To examine the association between the serum progesterone and estradiol and the studied endometrial morphological characteristics, the Spearman’s Rho Correlation coefficient for non-paramentric data was used. No correlation was found between serum estradiol levels and the studied morphological variables (p > 0.05). In contrast, the serum progesterone concentration showed a significant negative correlation with the percentage of glandular epithelial cells with basal vacuoles (R= - 0.28; p = 0.03), the mean size of the basal vacuoles (R= - 0.24; p = 0.5) and a significant positive correlation with the stromal edema (R = 0.34; p < 0.01). Limitations, reasons for caution The study was limited in sample size. Wider implications of the findings: The results of this study revealed that serum progesterone is more strongly associated with the occurrence of certain endometrial morphological characteristics during the mid-luteal phase than serum estradiol. These findings are valuable for development of new methods for accurate determination of the window of implantation. Trial registration number Not applicable

scholarly journals Determination of the effect of some pesticides on honey bees

2018 ◽  
pp. 104-108
Author(s):  
Ahmed Karahan ◽  
Mehmet Ali Kutlu ◽  
İsmail Karaca
Keyword(s):  
Honey Bees

scholarly journals Avaliação da estabilidade de agregados e a vulnerabilidade à erosão ao longo de uma vertente no município de Araruna, região noroeste do Paraná-Brasil / Evaluation of aggregates stability and vulnerability to erosion along a shed in the municipality of Araruna, northwest region of Paraná-Brazil

2018 ◽  
Vol 28 (55) ◽  
pp. 845-862
Author(s):  
Fabiana Barros Medeiros ◽  
Francieli Sant'ana Marcatto ◽  
Hélio Silveira ◽  
MariaTeresa De Nóbrega
Keyword(s):  
Structural Analysis ◽  
Soil Cover ◽  
Morphological Characteristics ◽  
Soil Horizons ◽  
Water Flows ◽  
Sandstone Formation ◽  
The Stability ◽  
Northwest Region

Esta pesquisa tem como objetivo estudar a vulnerabilidade à erosão dos solos da zona de contato do arenito da Formação Caiuá com o basalto da Formação Serra Geral, no município de Araruna, Mesorregião Noroeste Paranaense, dando enfoque ao papel da estabilidade da estrutura atual dos solos, considerando-se as alterações produzidas pelas formas de uso e ocupação da área. A análise realizada também considerou as variações das características morfológicas dos solos em perfil e ao longo da litossequência (sistema pedológico), assim como os seus reflexos na geração de setores mais ou menos suscetíveis à erosão na vertente. Para o levantamento dos solos ao longo da vertente foram utilizados os procediments propostos pela Análise Estrutural da Cobertura Pedológica e a coleta de amostras para a determinação da granulometria e estabilidade de agregados. Os resultados indicaram a ação dos fluxos de água laterais e verticais, atuando na transformação dos horizontes dos solos ao longo da vertente e uma variação da estabilidade estrutural associada as características morfológicas dos solos e ao tipo de uso e manejo empregado. Os Argissolos apresentaram agregados pequenos e um gradiente textural entre o horizonte superficial e subsuperficial, lhe conferindo uma forte suscetibilidade a erosão. O Nitossolo não apresentou grande diferenciação no tamanho dos agregados, exceto no horizonte Bw, onde a redução no tamanho dos agregados se associaram a mudança morfológica da estrutura do solo.AbstractThis research aims to study the vulnerability to soil erosion of the contact zone of the sandstone Formation Caiuá with basalt of the Serra Geral Formation, in the municipality of Araruna, Paraná Northwest Region, giving focus to the role of the stability of the current structure of soils, considering the changes produced by the forms of use and occupation of the area. The analysis also considered variations of morphological characteristics of soils in profile and along the lithosactivity (pedological system), as well as your reflexes in the generation of sectors more or less susceptible to erosion in the shed. For the survey of the soils along the strand, the procedures proposed by the Structural Analysis of the Pedological Coverage and the collection of samples for the determination of the granulometry and stability of aggregates were used. The results indicated the action of the lateral and vertical water flows, acting on the transformation of the soil horizons along the slope and a variation of the structural stability associated with the morphological characteristics of the soils and the type of use and management used. The Argisols presented small aggregates and a textural gradient between the surface and subsurface horizon, giving it a strong susceptibility to erosion. The Nitossolo did not show great differentiation in the size of the aggregates, except in the Bw horizon, where the reduction in the size of the aggregates was associated to the morphological change of the soil structure.Keywords: structural analysis of the soil cover, stability of aggregates, susceptibility to erosion, pedological systems.

scholarly journals SCDMImage: um aplicativo para detecção de características morfológicas em produtos agrícolas

2021 ◽  
Vol 1 (53) ◽  
pp. 27
Author(s):  
Valnyr Vasconcelos Lira ◽  
Francisco Fechine Borges ◽  
Jéssica Cordeiro da Silva Santos ◽  
Antônio Pedro Gomes Tabosa ◽  
Mário Eduardo Rangel Moreira Cavalcanti Mata
Keyword(s):  
Fruits And Vegetables ◽  
Mangifera Indica ◽  
Digital Camera ◽  
Morphological Characteristics ◽  
Reliable Estimate ◽  
Continuous Growth ◽  
The Masses ◽  
Cultivation Techniques

<p><span class="fontstyle0">With the evolution of cultivation techniques, the world production of fruits and vegetables has been presenting a continuous growth. Despite the increase in production, a significant portion of the harvested products is mainly lost in the post-harvest due to several factors, such as inapropriate handling, transportation and conservation, lack of selection and classification, poorly sized packaging, among others. In general, the quality of fruits and vegetables is usually evaluated by the following parameters: size, shape, mass, color, firmness, ripeness, absence of bruises and pathologies.The objective of this work was to develop an application in Matlab to detect morphological characteristics (width, length, area, perimeter) of Mangifera indica L., ‘Tommy Atkins’ mangos from images, and using the same images, estimate its weigth. The images of the mangoes were acquired with a digital camera attached to an illuminated box and later processed in an application developed in Matlab. The images showed the morphological characteristics of the samples were obtained and an equation was determined to estimate their mass. The determination of the mass from the images had a 96% correlation with the actual mass measured with a scale and it was possible to obtain a reliable estimate of the masses of the mangoes from their images.</span></p>

Determination of Carbaryl Residues in Honey Bees

1965 ◽  
Vol 48 (4) ◽  
pp. 771-774
Author(s):  
D P Johnson ◽  
H A Stansbury
Keyword(s):  
Aqueous Solution ◽  
Acetic Acid ◽  
Quantitative Determination ◽  
Honey Bees ◽  
Methylene Chloride ◽  
Hydrolysis Product ◽  
Separate Analysis ◽  
Yellow Substance ◽  
Hydrolysis Of

Abstract A method has been developed for detecting residues of carbaryl (1-naphthyl methylcarbamate) as well as its hydrolysis product, 1-naphthol, in dead bees. The method is based on extraction of the bees with benzene, followed by a cleanup involving liquid partitioning and chromatography on Florisil. The quantitative determination involves hydrolysis of carbaryl to 1-naphthol and coupling of the latter with p-nitrobenzenediazonium fluoborate in acetic acid to form a yellow substance. For separate analysis, free 1-naphthol is separated from methylene chloride into a basic aqueous solution. The sensitivity of the method is about 0.1 ppm; recoveries averaged 85.6 ± 6.6% for 1- naphthol and 83.8 ± 2.7% for carbaryl.

Morphological characteristics for sexing living adults of Chaetoptelius vestitus (Coleoptera, Curculionidae)

2019 ◽  
Vol 69 (2) ◽  
pp. 173-181
Author(s):  
Ibtihel Ghrissi ◽  
Mohamed Braham ◽  
Imen Said ◽  
James R. LaBonte ◽  
Thomas Shahan
Keyword(s):  
Sex Determination ◽  
Bark Beetle ◽  
Morphological Characteristics ◽  
External Morphology ◽  
Specific Character ◽  
Morphological Criteria ◽  
Non Destructive ◽  
Gender Specific ◽  
Pistachio Trees

Abstract The pistachio bark beetle, Chaetoptelius vestitus (Mulsant & Rey, 1861) is a serious pest of pistachio trees. Despite its phytosanitary importance, some aspects of its biology are still unclear. For example, determining the sex of this beetle is usually complicated by the lack of a discrete, externally visible gender-specific character. Here, the morphological characteristics of C. vestitus were studied in order to detect discriminative features for sexing living beetles. The shape of the seventh visible tergite effectively enabled the separation of the sexes. This method can be quickly learned, is non-destructive and permits sex determination of living C. vestitus adults with 100% accuracy and without damaging the insects. Sex determination using external morphology was confirmed by dissection under a stereomicroscope and by rearing experiments. These morphological criteria were further successfully verified on insects collected on seven other sites in Tunisia.

scholarly journals A Probabilistic Statistical Method for the Determination of Void Morphology with CFD-DEM Approach

Energies ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 4041
Author(s):  
Yuanxiang Lu ◽  
Sihan Liu ◽  
Xinru Zhang ◽  
Zeyi Jiang ◽  
Dianyu E
Keyword(s):  
Probabilistic Method ◽  
Gas Injection ◽  
Morphological Characteristics ◽  
Packed Bed ◽  
Two Dimensional ◽  
Two Phase ◽  
Binary Images ◽  
Void Shape ◽  
Shape And Size

Voids that are formed by gas injection in a packed bed play an important role in metallurgical and chemical furnaces. Herein, two-phase gas–solid flow in a two-dimensional packed bed during blast injection was simulated numerically. The results indicate that the void stability was dynamic, and the void shape and size fluctuated within a certain range. To determine the void morphology quantitatively, a probabilistic method was proposed. By statistically analyzing the white probability of each pixel in binary images at multiple times, the void boundaries that correspond to different probability ranges were obtained. The boundary that was most appropriate with the simulation result was selected and defined as the well-matched void boundary. Based on this method, the morphologies of voids that formed at different gas velocities were simulated and compared. The method can help us to express the morphological characteristics of the dynamically stable voids in a numerical simulation.

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