43 research outputs found
Ichthyologists of Argentina: Stella Maris Refi
No full textThis series will include all those people who, by means of their contributions, great and small, played a part in the consolidation of ichthyology in Argentina.The general plan of this work consists of individual factsheets containing a list of works by each author, along with reference bibliography and, whenever possible, personal pictures and additional material.The datasheets will be published primarily in chronological order, although this is subject to change by the availability of materials for successive editions.This work represents another approach for the recovery and revalorization of those who set the foundations of Argentine ichthyology while in diverse historical circumstances.I expect this to be the beginning of a major work that achieves the description of such a significant part of the history of natural sciences in Argentina.ProBiota: Programa para el estudio y uso sustentable de la biota australDebe citarse:
LÓPEZ, H. L & J. PONTE GÓMEZ. 2013. Ictiólogos de la Argentina: Stella Maris Refi. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 14(43): 1-30. ISSN 1515-9329
Penggunaan Media Audiovisual untuk Meningkatkan Motivasi Belajar PKN siswa SD
No full textRiset ini bertujuan untuk mengetahui pengaruh penggunaan media audiovisual dalam meningkatkan motivasi belajar siswa pada mata pelajaran Pendidikan Kewarganegaraan di Sekolah Dasar. Riset ini menggunakan metode kualitatif deskriptif dengan mengumpulkan data melalui angket daring (online) yang disebarkan kepada guru kelas di Sekolah Dasar. Hasil riset menunjukkan bahwa penggunaan media audiovisual dapat meningkatkan motivasi belajar siswa dan keterlibatan mereka dalam proses pembelajaran. Media audiovisual juga dapat membantu siswa memahami materi yang lebih kompleks dan meningkatkan kemampuan berbahasa lisan mereka. Namun, terdapat beberapa kendala yang teridentifikasi saat guru menggunakan media audiovisual, seperti masalah teknis dan keterbatasan sumber daya. Riset ini menegaskan bahwa media audiovisual memiliki potensi besar dalam meningkatkan kualitas pembelajaran dan motivasi belajar siswa. Oleh karena itu, diperlukan upaya bersama untuk meningkatkan kualitas pendidikan PKN agar lebih efektif dalam mencapai tujuannya. Riset ini juga menyarankan agar sekolah dan pihak terkait memberikan dukungan berupa perangkat yang lebih baik serta pelatihan yang memadai bagi guru agar dapat mengatasi kendala yang ad
Ictiólogos de la Argentina: Stella Maris Refi
No full textThis series will include all those people who, by means of their contributions, great and small, played a part in the consolidation of ichthyology in Argentina.
The general plan of this work consists of individual factsheets containing a list of works by each author, along with reference bibliography and, whenever possible, personal pictures and additional material.
The datasheets will be published primarily in chronological order, although this is subject to change by the availability of materials for successive editions.
This work represents another approach for the recovery and revalorization of those who set the foundations of Argentine ichthyology while in diverse historical circumstances.
I expect this to be the beginning of a major work that achieves the description of such a significant part of the history of natural sciences in Argentina
Graphene phytotoxicity in the seedling stage of cabbage, tomato, red spinach, and lettuce
No full textThe effects of graphene on root and shoot growth, biomass, shape, cell death, and reactive oxygen species (ROS) of cabbage, tomato, red spinach, and lettuce, were investigated using a concentration range from 500 to 2000 mg/L. The results of the combined morphological and physiological analyses indicate that after 20 days of exposure under our experimental conditions, graphene significantly inhibited plant growth and biomass compared to a control. The number and size of leaves of the graphene-treated plants were reduced in a dose-dependent manner. Significant effects also were detected showing a concentration-dependent increase in ROS and cell death as well as visible symptoms of necrotic lesions, indicating graphene-induced adverse effects on cabbage, tomato, and red spinach mediated by oxidative stress necrosis. Little or no significant toxic effect was observed with lettuce seedlings under the same conditions. The potential effect of graphene largely depends on dose, exposure time, and plant species and deserves further attention
PROSOCIAL BEHAVIOR IN ISLAMIC PSYCHOLOGY
No full textNowadays, there has been a decline in morality toward others. It is resulting in various problems, such as bullying, theft, promiscuity, alcohol, drugs, death due to social media violence, and anxiety. The variety of conflicts that occur means that prosocial behavior is needed to minimize the conflicts that arise. Prosocial behavior is defined as behavior that positively impacts the individual himself or others. This research aims to find out how prosocial behavior is from the perspective of Islamic psychology. This research uses a literature study type of research (literature review). This research uses books and articles relevant to the author\u27s discussion as the primary data sources for obtaining research related to prosocial behavior. This research shows that in Islamic psychology, prosocial behavior is in the form of helping; in surah al-maida verse 2, the words birr and piety are mentioned. Where birr means all good deeds, taqwa means fear of Allah, avoiding Allah\u27s prohibitions, and carrying out Allah\u27s commands
Understanding the intrinsic antibiotic resistance in Lysobacter enzymogenes, a ubiquitous environmental bacterium
No full textAntibiotics are one of the most important tools in modern medicine. Unfortunately, due to frequent use of antibiotics in clinical and agricultural areas, more bacterial strains in diverse environmental settings have been found to be resistant to many antibiotics, resulting in multidrug resistance (MDR). Increased understanding of antibiotic resistance in environmental bacteria provides new targets for discovery of novel therapeutics. However, little is known about the antibiotic resistance of the vast majority of environmental bacteria. The ubiquitous Gram-negative Lysobacter bacteria, as promising biocontrol agents, confer intrinsic antibiotic resistance and could be used as a model in understanding antibiotic resistance in non-clinical environments. First, to fill a critical knowledge gap in the prevalence and diversity of MDR in Lysobacter, we compared two strains of Lysobacter species, i.e., LeC3 and LaATCC29479, and determined their resistance to 12 common antibiotics. Our results revealed that both strains exhibited high level of MDR, and in comparison to LaATCC29479, LeC3 exhibited even higher levels of resistance against most antibiotics tested compared to LaATCC29479. Comparative resistomic analyses identified the core resistome of Lysobacter and also revealed potential genes related to the antibiotic resistance profiles in LeC3 and LaATCC29479. Second, screening two Tn5 transposon mutant libraries of LeC3 recovered 12 and 19 mutants with decreased ampicillin and spectinomycin resistance, respectively. Further characterization of selected mutants showed that cell permeability, β-lactamase activity and transport contributed to high level of resistance to ampicillin in LeC3; whereas high level of resistance to spectinomycin in LeC3 was mostly due to its ribosomal RNA target as well as related to cell-wall recycling and purine biosynthesis. Third, we demonstrated that the post-transcriptional regulator CsrA not only conferred MDR, but also contributed to biocontrol activity in LeC3. Furthermore, two putative small regulatory RNAs (sRNAs), referred to as csrB and csrC, were identified in the genome of LeC3. Double mutation of csrB and csrC in LeC3 led to increased resistance to nalidixic acid, rifampicin, and kanamycin. Collectively, this project paves the way for further MDR studies using Lysobacter bacteria.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-08-01The student, Menghao Yu, accepted the attached license on 2020-06-29 at 15:38.The student, Menghao Yu, submitted this Dissertation for approval on 2020-06-29 at 15:58.This Dissertation was approved for publication on 2020-07-10 at 08:50.DSpace SAF Submission Ingestion Package generated from Vireo submission #15477 on 2020-10-02 at 15:49:41Made available in DSpace on 2020-10-07T22:48:10Z (GMT). No. of bitstreams: 2
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Characterization of PPO-inhibitor resistance in waterhemp (Amaranthus tuberculatus) and Palmer amaranth (Amaranthus palmeri)
No full textWaterhemp and Palmer amaranth are two of the most troublesome weed species in the Midwest. The overuse of acetolactate synthase (ALS), photosystem II, and 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) inhibitors to control these species led to the evolution of resistance to these herbicides and, thus, protoporphyrinogen oxidase (PPO) inhibitors were used to help control these resistant weeds. Waterhemp was the first weed species to evolve resistance to PPO inhibitors, and Palmer amaranth evolved resistance ten years later. The first known mechanism for this resistance involves the deletion of a glycine codon corresponding to the 210th amino acid position (dG210) of the PPO enzyme (PPX2). Chapter 1 includes a literature review of the PPO enzyme, the mode of action of PPO-inhibiting herbicides, the biology of waterhemp and Palmer amaranth, and an overview of PPO-inhibitor resistance in these two species. Chapter 2 explores how resistance to PPO inhibitors evolved in a population each of waterhemp and Palmer amaranth growing in the same field. The results indicate that they did not hybridize with one another to pass on resistance, but that they each evolved resistance to PPO inhibitors independently via two different forms of convergent evolution. Chapter 3 further analyzes PPO-inhibitor-resistance evolution in these two species by characterizing the relative level of resistance to PPO inhibitors in Palmer amaranth and waterhemp conferred specifically by the dG210 mutation. The results suggested that Palmer amaranth is naturally more tolerant to PPO inhibitors than waterhemp when treated POST, giving it less of a selective advantage to evolve resistance. This could be why Palmer amaranth took long to evolve resistance to PPO inhibitors. Three different amino acid changes at a homologous site of PPX2 have conferred resistance to PPO-inhibiting herbicides in two weed species. Chapter 4 is aimed at exploring additional amino acid substitutions that could occur at this site to determine whether they can also confer resistance to PPO inhibitors. The effect of these substitutions coupled with the dG210 mutation was also tested. In vitro PPO enzyme assays were carried out to determine the level of resistance conferred by these modifications. Inhibitors used were lactofen, fomesafen, saflufenacil, and trifludimoxazin. Although some modifications rendered the enzyme inactive, most did not. The dG210 mutation and the double mutants conferred the highest levels of resistance to all of the inhibitors, and the single mutants all exhibited varying levels of resistance to the inhibitors. A transgenic E. coli cell line was used to test these enzyme modifications in a living system. It was found that all of the modifications were active when tested in vivo. The fifth and final chapter discusses concluding remarks and future research.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2021-05-01The student, Kathryn Lillie, accepted the attached license on 2019-04-23 at 14:05.The student, Kathryn Lillie, submitted this Thesis for approval on 2019-04-23 at 14:15.This Thesis was approved for publication on 2019-04-23 at 17:12.DSpace SAF Submission Ingestion Package generated from Vireo submission #13845 on 2019-08-22 at 15:07:53Made available in DSpace on 2019-08-23T20:36:07Z (GMT). No. of bitstreams: 2
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Monographic study of the museum complex of monuments as a means of unsubjecting of historical memory (using as an example medieval swords from the National Museum of Military History of Ukraine)
No full textСтаття присвячена специфіці монографічного дослідження музейних пам’яток із застосуванням мультидисциплінарного підходу. Автор розкриває історико-культурну інформацію, що несуть середньовічні шаблі: уточнює датування, висуває і обґрунтовує гіпотези щодо їхньої етнокультурної приналежності й особливостей бойового використання.Статья посвящена специфике монографического исследования музейных памятников, используя мультидисциплинарный подход. Автор раскрывает историко-культурную информацию, содержащуюся в средневековых саблях: уточняет их датировку, выдвигает
и обосновывает гипотезы их этнокультурной принадлежности и боевого использования.The article is devoted to speci fi city of monographic investigation of museum memorials
with using multidisciplinary approach. The author reveals the historical and cultural content of
medieval sabers: refi nes the age of these museum values, brings and substantiates the hypothesis
about their ethnical specifi city and combat using
Monographic study of the museum complex of monuments as a means of unsubjecting of historical memory (using as an example medieval swords from the National Museum of Military History of Ukraine)
No full textСтаття присвячена специфіці монографічного дослідження музейних пам’яток із застосуванням мультидисциплінарного підходу. Автор розкриває історико-культурну інформацію, що несуть середньовічні шаблі: уточнює датування, висуває і обґрунтовує гіпотези щодо їхньої етнокультурної приналежності й особливостей бойового використання.Статья посвящена специфике монографического исследования музейных памятников, используя мультидисциплинарный подход. Автор раскрывает историко-культурную информацию, содержащуюся в средневековых саблях: уточняет их датировку, выдвигает
и обосновывает гипотезы их этнокультурной принадлежности и боевого использования.The article is devoted to speci fi city of monographic investigation of museum memorials
with using multidisciplinary approach. The author reveals the historical and cultural content of
medieval sabers: refi nes the age of these museum values, brings and substantiates the hypothesis
about their ethnical specifi city and combat using
