Accelerated aging test in amaranth (Amaranthus cruentus L.) seeds

Martins, Andréa Bicca Noguez; Costa, C. J.; Xavier, Fernanda da Motta; Brunes, André Pich; Dias, Letícia Winke; Radke, Aline Klug; Eberhardt, Paulo Eduardo da Rocha; Cavalcante, Jerffeson Araújo; Vera, Maria Johana Gonzales; Tunes, Lílian Vanussa Madruga de; Moraes, Dário Munt de

doi:10.21475/ajcs.18.12.03.pne890

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…The 32-hour period, on the other hand since it ranked the safflower seed lots at three levels of vigor. Martins et al (2018) also succeeded in stratifying amaranth seed lots at different vigor levels. Based on the results obtained by the principal component analysis (Table 5), it was verified the need for three components, since these effectively summarize the total sample variance and can be used to study the data set, since according to Hongyu et al (2016) the eigenvalues of these components were higher than 1.…”

Section: Resultsmentioning

confidence: 96%

Accelerated aging test in the determination of safflower seeds vigor

Coelho

Silva

et al. 2022

Biosci. J.

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In assessing the quality of seed lots, the vigor tests are complementary to the germination test and they identify differences in the degree of deterioration of the lots. For safflower, there is little information regarding these tests. In this way, the intention of this study was to adapt the accelerated aging test methodology to assess the physiological potential of safflower seeds (Carthamus tinctorius). For this purpose, 12 seed lots were evaluated for thousand-seed weight, germination, first germination count, seedling emergence test (emergence percentage, emergence speed index, relative emergence frequency and the initial, final and mean times) and accelerated aging. For the accelerated aging test, the traditional and saline methods were used. For this, the samples were conditioned in periods of 0, 8, 16, 24, 32 and 48 hours at 42 °C. Afterwards, they were submitted to the germination test, with evaluation of normal seedlings on the 3rd day. The 12 lots were evaluated within each period, in independent experiments. The data were submitted to analysis of variance and the means were compared using the Scott-Knott clustering method at 5% probability. In the traditional accelerated aging test the periods of 16, 24, 32 and 48 hours were more efficient in differentiating the lots in vigor levels, as they stratified the lots in three classes and the time of 8 hour classified the lots in two levels of vigor. In the accelerated saline aging method the time 32 hours were more efficient since it ranked seed lots at three levels of vigor and the periods of 8, 16 and 24 hour stratified the lots in two levels. In results obtained by the principal component analysis it was verified. The variables traditional accelerated aging for 24 and 32 hours correlated with emergence in the field. Therefore, the traditional accelerated aging test at 42 °C for 24 hours are promising for evaluating the physiological quality of safflower seeds.

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Section: Resultsmentioning

confidence: 96%

Accelerated aging test in the determination of safflower seeds vigor

Coelho

Silva

et al. 2022

Biosci. J.

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Human Immunodeficiency Virus infection associated with crack cocaine use: the impact on perinatal transmission among 890 pregnancies in Brazil

Carvalho,

Berti,

Rauen

et al. 2021

J Bras Doenças Sex Transm

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Introduction: Human Immunodeficiency Virus infection is a prevalent infection occurring during pregnancy. The implementation of a program to screen and prevent vertical transmission is highly important in Public Healthcare. Pregnant crack users could face difficulties to test and adhere to the Highly Active Antiretroviral Therapy. Objective: The purpose of this research paper was to investigate whether crack cocaine abuse increases Human Immunodeficiency Virus perinatal transmission rates, as well as to evaluate the risk factors associated with such an increase. Methods: Design: A retrospective study. Setting: Department of Obstetrics and Gynecology, General Hospital of Universidade Federal do Paraná. Population: pregnancies of Human Immunodeficiency Virus-positive women who were using crack cocaine (n=64) were compared with that of non-users (n=826) from 2005 to 2013. Prenatal medical records, delivery records, and newborn records were analyzed. Main Outcome Measures: The vertical transmission of Human Immunodeficiency Virus in the group of crack cocaine users was 9.37% (6) versus 2.54% (21) among non-users (p=0.009744). Results: Over the years of the study, there was a decrease in the vertical transmission rate in non-users, while this number remained constant in the group of users. When analyzing the cases of perinatal transmission, it was found that 83.34% (5) had inadequate prenatal care, and 100% (6) had inadequate Human Immunodeficiency Virus treatment, compared to the group in which there was no vertical transmission, where 65.52% (38) had inadequate prenatal care and 70.86% (41) had inadequate treatment. Conclusion: Vertical transmission is higher among crack cocaine users and did not decrease over the years of the study, as occurred among non-users. Trends that explain this increase were non-adherence to adequate prenatal care, Human Immunodeficiency Virus diagnosis during pregnancy, irregular treatment, absence of intrapartum antiretroviral prophylaxis, and vaginal delivery route.

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Accelerated aging test in amaranth (Amaranthus cruentus L.) seeds

Cited by 2 publications

References 6 publications

Accelerated aging test in the determination of safflower seeds vigor

Accelerated aging test in the determination of safflower seeds vigor

Human Immunodeficiency Virus infection associated with crack cocaine use: the impact on perinatal transmission among 890 pregnancies in Brazil

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