183 research outputs found
Correction to: A study of plithogenic graphs: applications in spreading coronavirus disease (COVID-19) globally (Journal of Ambient Intelligence and Humanized Computing, (2022), 10.1007/s12652-022-03772-6)
No full textIn this article the author name 'Tauseef Ahmad' was incorrectly written as 'Tauseef Ahmed’
p53
No full textp53 is a protein that plays an important role in the regulation of cell division and thereby offers protection to the cell against malignant transformation. This is the most well-studied and most appreciated role of p53, due to which the protein is famously known as the “guardian of the genome.” It is the most studied protein in all forms of cancer research, with much of this research investigating p53’s role in tumor suppression. However, research has also shown that p53 plays a role in a wide range of other cellular functions, like serving as a biomarker for environmental pollution. Even as a tumor suppressor and transcription factor, many aspects of p53 function are still obscure, and research in the field is continually attempting to shed light on these functions. This book examines and discusses the myriad roles of p53 and different aspects of its functions. Chapters examine p53 in cancer prevention, DNA repair, gene regulation, and more
Role of biocontrol agents in weed management – recent developments and trends
Full text linkWithin integrated pest management programs, biological control of unwanted plants has remarkable capacity to provide viable, effective, and economic control of weeds. When using bio-herbicides, crop production and quality improve with virtually no damage to the ecosystem. Bioherbicides are target-specific, destroy only selected weeds that have been sprayed for and do not cause harm to non-target plants. Bio-herbicides can be quickly incorporated into weed control programs, which can reduce chemical herbicide dependence. We are also raising the chance of environmental pollution by pesticides. There are only a few bio-herbicides available on commercial bases although work began earlier in the 1940s. Sources of commercialized bioherbicides include Phytophthora palmivora (Devine), Collectotrichum gleosporiodes (Collego), Colletotrichum gloeosporioides (Binomial) and Streptomyces viridochromogenes (Bialaphos and Glufosinate). Virulence for pathogens and their environmental requirement are major constraints for bioherbicide development. Specific bio-herbicides should be useful in finding position in irrigated fields, wildlife while thriving weeds with pests or resistant weed control.Within integrated pest management programs, biological control of unwanted plants has remarkable capacity to provide viable, effective, and economic control of weeds. When using bio-herbicides, crop production and quality improve with virtually no damage to the ecosystem. Bioherbicides are target-specific, destroy only selected weeds that have been sprayed for and do not cause harm to non-target plants. Bio-herbicides can be quickly incorporated into weed control programs, which can reduce chemical herbicide dependence. We are also raising the chance of environmental pollution by pesticides. There are only a few bio-herbicides available on commercial bases although work began earlier in the 1940s. Sources of commercialized bioherbicides include Phytophthora palmivora (Devine), Collectotrichum gleosporiodes (Collego), Colletotrichum gloeosporioides (Binomial) and Streptomyces viridochromogenes (Bialaphos and Glufosinate). Virulence for pathogens and their environmental requirement are major constraints for bioherbicide development. Specific bio-herbicides should be useful in finding position in irrigated fields, wildlife while thriving weeds with pests or resistant weed control
Phytotoxic Activity of Bioactive Compounds from Four Plants against Selected Weeds in Agriculture
Full text linkAim of the study:
Heavy doses of synthetic weed control chemicals have caused herbicide resistance in weeds. Natural compounds produced by living organisms constitute a wide field for ecologically safe herbicides. The current investigation was directed to test allelopathic potential of hexane extracts of selected plants against common weeds of agriculture.
Material and methods:
Allelopathic potential of Carica papaya, Rhazya stricta, Lantana camara and Pinus roxburghii hexane extracts against weeds viz. Euphorbia helioscopia, Rumex dentatus, Phalaris minor, Avena fatua and Chenopodium album was determined at 100%, 75% and 50% concentration on soil, filter paper and agar. Parameters for assessing allelopathic potential were the germination (%), plumule and radicle size (cm). Data analysis was performed using the software STATISTIX 9.
Results and conclusions:
Based on the findings, it was determined that R. stricta, C. papaya, L. camara and P. roxburghii hexane extract possesses possible suppression effects among which L. camara had the most conspicuous inhibition effects on selected weeds. The inhibitory effects of germination and growth were establishing in order R. stricta > L. camara > C. papaya > P. Roxburghii. Field analysis to assess the phytotoxic ability of these species to be used as herbicide is recommended
Epigenetics to Optogenetics
No full textEpigenetics, which deals with the study of heritable gene expression that takes place independent of changes in DNA sequence, and optogenetics, which deals with the study of genes expressed under the influence of light, are two emerging areas of study and research that have contributed immensely to our current knowledge of mechanisms and disease processes in humans. These disciplines are interrelated in the broader picture of biology and one can be used to change or modify the other. The complexity of the techniques involved in these disciplines often leads to a lack of proper understanding by researchers from other disciplines and the scientific community at large. As such, this book provides simple and easy-to-follow explanations of some of the most exciting areas of research in these disciplines
Isolation of vitexin as natural bio-herbicide from Lantana camara leaves
No full text‘Yield maximization’ is the last word of modern agriculture for food security of ever increasing population of the world. Maximizing world’s agricultural efficiency depends largely on controlling a variety of pests and diseases. Among pests, weeds have largest negative impact on crop productivity. Among main strategies used to control weeds (i.e., physical, mechanical, chemical and biological) the chemical method is most popular for decreasing negative effects of weeds in crops. But, herbicide-resistant weeds have been emerging due to extensive use of synthetic chemical herbicides, and public concerns over impact of synthetic herbicidal chemicals on environment and human health are increasing. Natural compounds, known as “bio-herbicides” pose a big area for environmentally safe herbicides, based on compounds produced by living organisms. In current study, crude methanol extract of invasive toxic plant Lantana camara leaves was prepared by cold maceration technique and was subjected to fractionation. Fractionation resulted in three organic (ethyl acetate, chloroform and n-hexane) and one aqueous fraction for the crude extract. Bioassays were performed at 10,000ppm, 1,000 ppm and 500ppm concentration against selected weed test species (monocot: Avena fatua and Phalaris minor; Dicot: Rumex dentatus and Chenopodium album). Chloroform fraction was selected on the basis for its highest herbicidal activity. Silica gel was used for column chromatography. Sample was loaded after adsorption on silica gel by making a uniform and even layer. Mobile phase of Hexane: Ethyl acetate (60:40) was used based on TLC profiling. A total of 31 elusions were collected in small column vials. They were left overnight to make them concentrated and were again subjected to Thin Layer Chromatography (TLC). Vanillin TLC stains was used for visualization purpose. Fractions with similar TLC pattern were combined and bio-assayed against radish seeds at 1mg/mL. Sub-fraction (iii) of fraction 23 showed highest growth inhibition therefore selected for further analysis. GC-MS (Shimadzu GC-MS-QP2010 ultra) with Helium gas as carrier was used to find out purity of compound and possible compound identification. GCMS analysis showed the compound as Vitexin (C21H20O10) (flavone glucoside). To the best of our knowledge Lantana camara leaves have not been previously reported to possess flavonoid compound ‘vitexin’ and tested against weeds of wheat crop
FACTS device control strategy using PMU
No full textSummaryThe laying and commissioning of new transmission line is very difficult due to socio-economic problems, like environmental clearances, right of way, etc. Therefore, there is an emphasis on better utilization of available transmission infrastructure. FACTS devices can provide reactive power compensation, transmission capability enhancement, and voltage and stability improvement. FACTS devices operate under the command of system operator who analyses its demand by the data acquired through traditional SCADA system, state estimation algorithms and PMUs. SCADA together with PMU give accurate information about the operational state of power system. This paper proposes a scheme to automate the FACTS devices in collaboration with PMUs in a more efficient way. Highly precised data from PMUs can be fed to intelligent controllers for effective analyzing and automating the FACTS device through control command. Thus, this combination can provide real time control of reactive power, together with enhancement of power handling capability and stability improvement
An investigation on directionally dependent fracture toughness behavior of monolithic nickel gradient material synthesized from electroplating
No full text
- …
