Bamidele Samuel | Ladoke Akintola University of Technology (original) (raw)
Papers by Bamidele Samuel
Research Square, Feb 17, 2020
In this paper different scenarios for back protection of a canvas painting and their effect on th... more In this paper different scenarios for back protection of a canvas painting and their effect on the stability of the relative humidity behind the painting are tested. A painting on canvas, stretched on a wooden frame, was fitted with various styles of back protection and then exposed to a cycle of temperature variation at the back, with the front exposed to a constant room temperature. The painting was also exposed to a constant wall temperature and varying room temperature. The space between the canvas and the back board was fitted with temperature and relative humidity (RH) sensors. The sensors were used to provide the essential single-point data of temperature and RH at the given locations. For more comprehensive understanding of the rather confined space, further numerical simulation (computational fluid dynamics) was adopted as part of the investigation. The computational fluid dynamics was used to understand the natural convection within the microclimate through the depictions of temperature distribution, as well as the corresponding airflow. The unprotected painting suffered a large RH variation at its back, because of the varying canvas temperature interacting with the constant room air moisture content. Effective stabilisation of the RH behind the canvas against temperature variation was provided by a shiny aluminium alloy sheet sealed against the frame. The non-absorbent back board experienced a strong variation in RH, because of humidity buffering of the space by the painting canvas at a different temperature. Either a space or insulation between this back plate and the wall reduced the risk of condensation on the inner surface of the back plate. Insulation will however increase the risk of condensation on the wall surface behind the painting. An absorbent back board de-stabilised the RH at the painting canvas surface by providing a competing humidity buffer at a different temperature. To provide protection against moisture exchange with an unsuitable room RH, extra humidity buffer was placed 3 mm behind the painting canvas, kept close to the painting temperature by insulation between this buffer and the back board. This stabilised RH at the canvas surface but increased both the temperature and the RH variation at the back board and thus increased the risk of condensation on the inner surface of the back board. The RH and the temperature in the narrow spaces between the painting canvas and the wooden stretcher frame were always more nearly constant than in the open canvas area, which suggests an explanation for the widely observed better condition of the areas of canvas paintings which lie close over the support structure. Our conclusion is that a non-absorbent, impermeable back plate gives good RH stability against a changing temperature gradient between wall and canvas painting surface.
Edward Elgar Publishing, Apr 26, 2002
Persée - Portail des revues scientifiques en SHS, 1986
Representations of Hades, the Underworld, and the afterlife in ancient Greek literature have trad... more Representations of Hades, the Underworld, and the afterlife in ancient Greek literature have traditionally been studied from a religious or mythological perspective. Scholars have often tried to extrapolate historical practices and eschatological beliefs about life after death from accounts of rituals and myths surrounding funerary practices, cult beliefs, necromantic encounters, and descents by heroes to the Underworld. As a result of this focus, scholars have generally overlooked the narrative function of Underworld scenes. In this project, I examine ancient Underworld scenes from Homer to Plato as a type of literary device containing unique rhetorical features and functions. I argue that Underworld scenes are embedded authorial commentaries, which allow communication between author and audience in an exercise of narrative self-reflection. Underworld scenes condense the actions and themes of the main story into an abbreviated space while also situating their parent narratives within a dynamic historical and literary tradition. Through these scenes, authors and artists create networks of texts by including iii allusions and story patterns, which can activate similar tales of ghostly encounter (nekuia), underworld journeys (katabaseis), punishment for sinners, and rewards for the "blessed." Underworld scenes "open up" dialogues between texts and characters across time and space so they could engage with each other and their tradition. Thus, Homer could imagine Odysseus talking to the ghosts of Achilles and Agamemnon in the Odyssey as a contemplation of heroism, and Plato could imagine Socrates anticipating afterlife conversations about justice with Homer, Ajax and Orpheus in the Apology. Chapter 1 presents the parameters of Underworld scenes and the methodologies that will be used in analyzing these scenes. Chapter 2 examines the structure of Underworld scenes in early Archaic poetry as well as the distinct language and image set which allowed communication between authors and audiences. Chapter 3 shows how Greek epinician and lyric poets used Underworld scenes to assimilate their patrons to heroes who achieved a "blessed" afterlife. Chapter 4 focuses on the use of Underworld scenes on the dramatic stage and in funerary contexts in Classical Athens to portray and offer solutions to contemporary political and social issues. Finally, Chapter 5 explores famous Underworld episodes in Plato's dialogues and examines how Socrates uses Underworld scenes to overwrite traditional sources and redefine the afterlife as a stage of life, like childhood and old age.
Глобальный финансовый кризис 2007-2009 гг. привел к масштабным изменениям как мирового финансовог... more Глобальный финансовый кризис 2007-2009 гг. привел к масштабным изменениям как мирового финансового сектора в целом, так и отдельных его сегментов. Изменились направления движения финансовых потоков, структура рынка по инструментам, политика его участников. В статье автор анализирует важнейшие из этих изменений.Global financial crisis of 2007-2009 caused impressive changes of the world financial sector. Directions of international financial flows, structure of financial markets, preferences of market participants have changed. This article describes most important of this changes.
In recent years, machine learning and computer vision are very cooperative technologies. Combinin... more In recent years, machine learning and computer vision are very cooperative technologies. Combining these two technologies provides learning algorithms in images and videos, and this provides automated extracting meaningful data on a visual basis. The starting point of this project is also combining these two technologies. Object detection and recognition are widespread fields on computer vision recently. Feature detection algorithms do these. Combining them with the machine learning algorithm provides to the user to find the same or similar object in different images or different angles of a camera view. On this project, counting is added to that features. Counting is a bit challenging because after object recognition it should be compared again with the previous objects for it is a new object or not. If it is a new object, it will be counted, else vice versa. This process should be run very effectively. Because even one mismatch will cause failure of the target. Also, this project ...
The aim of this study is to expand the horizon and boundary of knowledge and understanding of the... more The aim of this study is to expand the horizon and boundary of knowledge and understanding of the workplace stress by investigating the effects of organisational culture and stress on employee commitment in the workplace. The attempt is to close the gap between organisational culture, workplace stress and employee commitment. Although the concepts of culture and stress have been well researched but few studies have provided detailed insight into the interplay between the concepts of organisational culture, workplace stress and commitment. This study therefore examined this interplay within the Test Development Division of the National Examination Council (NECO), Lagos, Nigeria. The instruments used to gather data from the staff of the department that make up Division was questionnaire survey. The results show that the departments have hierarchical culture that is unsupportive and that the staff of the departments have too much work to do with less time for the accomplishment. The as...
eL Bidayah: Journal of Islamic Elementary Education, 2020
This type of research is descriptive qualitative. According to Kirt and Miller in his book Lexy J... more This type of research is descriptive qualitative. According to Kirt and Miller in his book Lexy J. Moleong, "Qualitative research is that researchers have studied the phenomena studied by natural settings. Therefore, the data raised in the form of description with words, both oral and written language. While the data collection method uses observation, interviews / interviews and documentation. Then analyzed using descriptive / data exposure. From the results of data exposure, research findings and discussion can be seen that: {1} the increase in teacher independence in MI Al Munir Gadungan Village is seen in several activities, namely [a] through preparation of learning by preparing RPP in accordance with applicable SK and KD, [b] increase teacher creativity in developing learning strategies. [c] teacher creativity in choosing and using learning methods ,. [d] The creativity of the teacher in selecting and using learning media is very important to do, [e] the creativity of the...
Surgical Endoscopy, 2019
Background Acute diverticulitis (AD) presents a unique diagnostic and therapeutic challenge for g... more Background Acute diverticulitis (AD) presents a unique diagnostic and therapeutic challenge for general surgeons. This collaborative project between EAES and SAGES aimed to summarize recent evidence and draw statements of recommendation to guide our members on comprehensive AD management. Methods Systematic reviews of the literature were conducted across six AD topics by an international steering group including experts from both societies. Topics encompassed the epidemiology, diagnosis, management of non-complicated and complicated AD as well as emergency and elective operative AD management. Consensus statements and recommendations were generated, and the quality of the evidence and recommendation strength rated with the GRADE system. Modified Delphi methodology was used to reach consensus among experts prior to surveying the EAES and SAGES membership on the recommendations and likelihood to impact their practice. Results were presented at both EAES and SAGES annual meetings with live re-voting carried out for recommendations with < 70% agreement. Results A total of 51 consensus statements and 41 recommendations across all six topics were agreed upon by the experts and submitted for members' online voting. Based on 1004 complete surveys and over 300 live votes at the SAGES and EAES Diverticulitis Consensus Conference (DCC), consensus was achieved for 97.6% (40/41) of recommendations with 92% (38/41) agreement on the likelihood that these recommendations would change practice if not already applied. Areas of persistent disagreement included the selective use of imaging to guide AD diagnosis, recommendations against antibiotics in non-complicated AD, and routine colonic evaluation after resolution of non-complicated diverticulitis. Conclusion This joint EAES and SAGES consensus conference updates clinicians on the current evidence and provides a set of recommendations that can guide clinical AD management practice.
Xenotransplantation, 2019
Recently, Langin et al contributed an important paper to Nature 1 , in which they reported succes... more Recently, Langin et al contributed an important paper to Nature 1 , in which they reported successful pig orthotopic heart transplantation (OHT) in baboons, two of whom survived for 6 months. The authors are to be congratulated on advancing the field significantly. Their encouraging data, obtained in a challenging experimental model, support the results achieved in life-supporting pig-to-nonhuman primate kidney transplantation models, where graft survival has extended to many months or even longer than one year 2-5. The Munich group appears to have overcome-at least to a significant extent-two of the hurdles that limited success of pig OHT. We would like to make what we hope are constructive comments on these two topics.
Review of Palaeobotany and Palynology, 2018
Abstract Bamboos comprise the subfamily Bambusoideae distributed in all continents except for Ant... more Abstract Bamboos comprise the subfamily Bambusoideae distributed in all continents except for Antarctica and Europe. They occupy varied habitats and are sensitive to climate change. They have sporadic flowering and low rates of dispersal, which make them indigenous and characteristic of the continents in which they occur. Plate tectonics have also played an important role in their dispersal. The dependency of various organisms on bamboos as food source and their sensitivity to climate change make bamboos difficult to manage in terms of their sustainable use. Moreover, habitat polymorphism in bamboos poses difficulties when reconstructing their evolutionary ecology, diversification, and biogeography, though molecular phylogenetic data infer their evolution in a warm and mesic environment. We report two new fossil compressions/ impressions of bamboo culms, namely Bambusiculmus tirapensis sp. nov. and Bambusiculmus makumensis sp. nov. from the late Oligocene and two new impressions of bamboo leaves, namely Bambusium deomarense sp. nov. and Bambusium arunachalense sp. nov. from the late Miocene to Pliocene sediments of northeast India. The culm fossils reported here represent the earliest records of bamboos from Asia thereby indicating that bamboos probably dispersed to Asia from India after the establishment of land connections between the Indian and Eurasian plates. The Neogene bamboos indicate the diversification of their ecological niche during the Miocene in Asia. The present fossils also reveal their adaptation to a monsoonal climate since the late Oligocene.
International Journal of Indian Culture and Business Management, 2017
This study examines both the short-run and long-run relationship among information and communicat... more This study examines both the short-run and long-run relationship among information and communication technology (ICT), economic growth and electricity consumption using annual time-series data for India for the period 1991-2014. All the variables under study are I (1) as per Dickey-Fuller-Generalised least square unit root test results. For cointegration test and causality analysis, we have used autoregressive distributive lag (ARDL) bounds test and vector error correction model (VECM) Granger causality test respectively. ARDL test results suggest that ICT stimulates economic growth in the short-run but not in the long-run, whereas electricity consumption has significant and positive impact on economic growth in the long-run and short-run as well, which supports the energy-led growth hypothesis. However, there is no cointegration when electricity consumption becomes a dependent variable and other variables are independent. Economic growth does not Granger cause electricity consumption in the short-run. These findings suggest that India should focus on ICT expansion to accelerate economic growth in short-run and India should not follow energy conservation policies as it might adversely impact economic growth in both short- and long-run. Instead, India should focus on energy efficient policies. This study has crucial policy implications. Hence, proper balance and coordination among ICT policy, energy policy, and economic growth policy are recommended.
Chemischer Informationsdienst, 1976
Scientific reports, Jan 22, 2017
We report the release of catalytic DNA walkers from hydrogel microparticles and the detection of ... more We report the release of catalytic DNA walkers from hydrogel microparticles and the detection of those walkers by substrate-coated microparticles. This might be considered a synthetic biology analog of molecular signal release and reception. One type of particles was coated with components of a DNA one-step strand displacement (OSD) reaction to release the walker. A second type of particle was coated with substrate (or "track") for the molecular walker. We distinguish these particle types using fluorescence barcoding: we synthesized and distinguished multiple particle types with multicolor fluorescence microscopy and automated image analysis software. This represents a step toward amplified, multiplex, and microscopically localized detection based on DNA nanotechnology.
Journal of Interdisciplinary Histopathology, 2016
Background: Cadmium (Cd) is a toxic heavy metal of both environmental and occupational concerns. ... more Background: Cadmium (Cd) is a toxic heavy metal of both environmental and occupational concerns. The health impact of ethno-botanical approaches in attempts to ameliorate its deleterious effects in biological systems should be an area of scientific interest since established therapies are often burdened with undesirable side effects. Aim: To determine the effects of polyphenol-rich extract of the leaf of Vernonia amygdalina (PEVA) on Cd-induced testicular toxicity, oxidative stress, and histopathology in Wistar rats. Materials and Methods: A total of twenty five (25) male Wistar rats were divided into five groups as follows: Group 1 (Control) received distilled water (0.2 ml/100 g i.p.) for 5 consecutive days and thereafter left untreated for 28 days. Group 2 received Cd alone at 5 mg/kg (i.p.) for 5 consecutive days. Group 3 was pre-treated with Cd as Group 2 and thereafter left untreated for a period of 28 days, whereas Groups 4 and 5 were pre-treated with Cd as Group 2 and thereafter received PEVA (orally) at two dose levels (200 and 400 mg/kg, respectively) for 28 days. Results: Cd administration induced reproductive toxicity as evidenced by lowered level of follicle stimulating hormone, luteinizing hormone, and testosterone (P < 0.05); perturbation of sperm characterization (P < 0.05); deleterious disruptions of the antioxidant system as evidenced by lowered levels of reduced glutathione and superoxide dismutase as well as elevation in thiobarbituric acid reactive substances level (P < 0.05); decrease in relative testicular weight (P < 0.05); and severe disseminated necrosis of the seminiferous tubules with terminally undifferentiated/necrotic cells as revealed by the histopathological examination. These conditions were sustained following administration of the two dose levels of PEVA. Conclusion: PEVA administration is not a suitable therapeutic choice for fertility enhancement in male Wistar rat model of Cd-induced decline in reproductive function.
Officieel Orgaan Van De Historische Vereniging Vleuten De Meern Haarzuilens Jg 4 Nr 4 P 253 256, 1984
Research Square, Feb 17, 2020
In this paper different scenarios for back protection of a canvas painting and their effect on th... more In this paper different scenarios for back protection of a canvas painting and their effect on the stability of the relative humidity behind the painting are tested. A painting on canvas, stretched on a wooden frame, was fitted with various styles of back protection and then exposed to a cycle of temperature variation at the back, with the front exposed to a constant room temperature. The painting was also exposed to a constant wall temperature and varying room temperature. The space between the canvas and the back board was fitted with temperature and relative humidity (RH) sensors. The sensors were used to provide the essential single-point data of temperature and RH at the given locations. For more comprehensive understanding of the rather confined space, further numerical simulation (computational fluid dynamics) was adopted as part of the investigation. The computational fluid dynamics was used to understand the natural convection within the microclimate through the depictions of temperature distribution, as well as the corresponding airflow. The unprotected painting suffered a large RH variation at its back, because of the varying canvas temperature interacting with the constant room air moisture content. Effective stabilisation of the RH behind the canvas against temperature variation was provided by a shiny aluminium alloy sheet sealed against the frame. The non-absorbent back board experienced a strong variation in RH, because of humidity buffering of the space by the painting canvas at a different temperature. Either a space or insulation between this back plate and the wall reduced the risk of condensation on the inner surface of the back plate. Insulation will however increase the risk of condensation on the wall surface behind the painting. An absorbent back board de-stabilised the RH at the painting canvas surface by providing a competing humidity buffer at a different temperature. To provide protection against moisture exchange with an unsuitable room RH, extra humidity buffer was placed 3 mm behind the painting canvas, kept close to the painting temperature by insulation between this buffer and the back board. This stabilised RH at the canvas surface but increased both the temperature and the RH variation at the back board and thus increased the risk of condensation on the inner surface of the back board. The RH and the temperature in the narrow spaces between the painting canvas and the wooden stretcher frame were always more nearly constant than in the open canvas area, which suggests an explanation for the widely observed better condition of the areas of canvas paintings which lie close over the support structure. Our conclusion is that a non-absorbent, impermeable back plate gives good RH stability against a changing temperature gradient between wall and canvas painting surface.
Edward Elgar Publishing, Apr 26, 2002
Persée - Portail des revues scientifiques en SHS, 1986
Representations of Hades, the Underworld, and the afterlife in ancient Greek literature have trad... more Representations of Hades, the Underworld, and the afterlife in ancient Greek literature have traditionally been studied from a religious or mythological perspective. Scholars have often tried to extrapolate historical practices and eschatological beliefs about life after death from accounts of rituals and myths surrounding funerary practices, cult beliefs, necromantic encounters, and descents by heroes to the Underworld. As a result of this focus, scholars have generally overlooked the narrative function of Underworld scenes. In this project, I examine ancient Underworld scenes from Homer to Plato as a type of literary device containing unique rhetorical features and functions. I argue that Underworld scenes are embedded authorial commentaries, which allow communication between author and audience in an exercise of narrative self-reflection. Underworld scenes condense the actions and themes of the main story into an abbreviated space while also situating their parent narratives within a dynamic historical and literary tradition. Through these scenes, authors and artists create networks of texts by including iii allusions and story patterns, which can activate similar tales of ghostly encounter (nekuia), underworld journeys (katabaseis), punishment for sinners, and rewards for the "blessed." Underworld scenes "open up" dialogues between texts and characters across time and space so they could engage with each other and their tradition. Thus, Homer could imagine Odysseus talking to the ghosts of Achilles and Agamemnon in the Odyssey as a contemplation of heroism, and Plato could imagine Socrates anticipating afterlife conversations about justice with Homer, Ajax and Orpheus in the Apology. Chapter 1 presents the parameters of Underworld scenes and the methodologies that will be used in analyzing these scenes. Chapter 2 examines the structure of Underworld scenes in early Archaic poetry as well as the distinct language and image set which allowed communication between authors and audiences. Chapter 3 shows how Greek epinician and lyric poets used Underworld scenes to assimilate their patrons to heroes who achieved a "blessed" afterlife. Chapter 4 focuses on the use of Underworld scenes on the dramatic stage and in funerary contexts in Classical Athens to portray and offer solutions to contemporary political and social issues. Finally, Chapter 5 explores famous Underworld episodes in Plato's dialogues and examines how Socrates uses Underworld scenes to overwrite traditional sources and redefine the afterlife as a stage of life, like childhood and old age.
Глобальный финансовый кризис 2007-2009 гг. привел к масштабным изменениям как мирового финансовог... more Глобальный финансовый кризис 2007-2009 гг. привел к масштабным изменениям как мирового финансового сектора в целом, так и отдельных его сегментов. Изменились направления движения финансовых потоков, структура рынка по инструментам, политика его участников. В статье автор анализирует важнейшие из этих изменений.Global financial crisis of 2007-2009 caused impressive changes of the world financial sector. Directions of international financial flows, structure of financial markets, preferences of market participants have changed. This article describes most important of this changes.
In recent years, machine learning and computer vision are very cooperative technologies. Combinin... more In recent years, machine learning and computer vision are very cooperative technologies. Combining these two technologies provides learning algorithms in images and videos, and this provides automated extracting meaningful data on a visual basis. The starting point of this project is also combining these two technologies. Object detection and recognition are widespread fields on computer vision recently. Feature detection algorithms do these. Combining them with the machine learning algorithm provides to the user to find the same or similar object in different images or different angles of a camera view. On this project, counting is added to that features. Counting is a bit challenging because after object recognition it should be compared again with the previous objects for it is a new object or not. If it is a new object, it will be counted, else vice versa. This process should be run very effectively. Because even one mismatch will cause failure of the target. Also, this project ...
The aim of this study is to expand the horizon and boundary of knowledge and understanding of the... more The aim of this study is to expand the horizon and boundary of knowledge and understanding of the workplace stress by investigating the effects of organisational culture and stress on employee commitment in the workplace. The attempt is to close the gap between organisational culture, workplace stress and employee commitment. Although the concepts of culture and stress have been well researched but few studies have provided detailed insight into the interplay between the concepts of organisational culture, workplace stress and commitment. This study therefore examined this interplay within the Test Development Division of the National Examination Council (NECO), Lagos, Nigeria. The instruments used to gather data from the staff of the department that make up Division was questionnaire survey. The results show that the departments have hierarchical culture that is unsupportive and that the staff of the departments have too much work to do with less time for the accomplishment. The as...
eL Bidayah: Journal of Islamic Elementary Education, 2020
This type of research is descriptive qualitative. According to Kirt and Miller in his book Lexy J... more This type of research is descriptive qualitative. According to Kirt and Miller in his book Lexy J. Moleong, "Qualitative research is that researchers have studied the phenomena studied by natural settings. Therefore, the data raised in the form of description with words, both oral and written language. While the data collection method uses observation, interviews / interviews and documentation. Then analyzed using descriptive / data exposure. From the results of data exposure, research findings and discussion can be seen that: {1} the increase in teacher independence in MI Al Munir Gadungan Village is seen in several activities, namely [a] through preparation of learning by preparing RPP in accordance with applicable SK and KD, [b] increase teacher creativity in developing learning strategies. [c] teacher creativity in choosing and using learning methods ,. [d] The creativity of the teacher in selecting and using learning media is very important to do, [e] the creativity of the...
Surgical Endoscopy, 2019
Background Acute diverticulitis (AD) presents a unique diagnostic and therapeutic challenge for g... more Background Acute diverticulitis (AD) presents a unique diagnostic and therapeutic challenge for general surgeons. This collaborative project between EAES and SAGES aimed to summarize recent evidence and draw statements of recommendation to guide our members on comprehensive AD management. Methods Systematic reviews of the literature were conducted across six AD topics by an international steering group including experts from both societies. Topics encompassed the epidemiology, diagnosis, management of non-complicated and complicated AD as well as emergency and elective operative AD management. Consensus statements and recommendations were generated, and the quality of the evidence and recommendation strength rated with the GRADE system. Modified Delphi methodology was used to reach consensus among experts prior to surveying the EAES and SAGES membership on the recommendations and likelihood to impact their practice. Results were presented at both EAES and SAGES annual meetings with live re-voting carried out for recommendations with < 70% agreement. Results A total of 51 consensus statements and 41 recommendations across all six topics were agreed upon by the experts and submitted for members' online voting. Based on 1004 complete surveys and over 300 live votes at the SAGES and EAES Diverticulitis Consensus Conference (DCC), consensus was achieved for 97.6% (40/41) of recommendations with 92% (38/41) agreement on the likelihood that these recommendations would change practice if not already applied. Areas of persistent disagreement included the selective use of imaging to guide AD diagnosis, recommendations against antibiotics in non-complicated AD, and routine colonic evaluation after resolution of non-complicated diverticulitis. Conclusion This joint EAES and SAGES consensus conference updates clinicians on the current evidence and provides a set of recommendations that can guide clinical AD management practice.
Xenotransplantation, 2019
Recently, Langin et al contributed an important paper to Nature 1 , in which they reported succes... more Recently, Langin et al contributed an important paper to Nature 1 , in which they reported successful pig orthotopic heart transplantation (OHT) in baboons, two of whom survived for 6 months. The authors are to be congratulated on advancing the field significantly. Their encouraging data, obtained in a challenging experimental model, support the results achieved in life-supporting pig-to-nonhuman primate kidney transplantation models, where graft survival has extended to many months or even longer than one year 2-5. The Munich group appears to have overcome-at least to a significant extent-two of the hurdles that limited success of pig OHT. We would like to make what we hope are constructive comments on these two topics.
Review of Palaeobotany and Palynology, 2018
Abstract Bamboos comprise the subfamily Bambusoideae distributed in all continents except for Ant... more Abstract Bamboos comprise the subfamily Bambusoideae distributed in all continents except for Antarctica and Europe. They occupy varied habitats and are sensitive to climate change. They have sporadic flowering and low rates of dispersal, which make them indigenous and characteristic of the continents in which they occur. Plate tectonics have also played an important role in their dispersal. The dependency of various organisms on bamboos as food source and their sensitivity to climate change make bamboos difficult to manage in terms of their sustainable use. Moreover, habitat polymorphism in bamboos poses difficulties when reconstructing their evolutionary ecology, diversification, and biogeography, though molecular phylogenetic data infer their evolution in a warm and mesic environment. We report two new fossil compressions/ impressions of bamboo culms, namely Bambusiculmus tirapensis sp. nov. and Bambusiculmus makumensis sp. nov. from the late Oligocene and two new impressions of bamboo leaves, namely Bambusium deomarense sp. nov. and Bambusium arunachalense sp. nov. from the late Miocene to Pliocene sediments of northeast India. The culm fossils reported here represent the earliest records of bamboos from Asia thereby indicating that bamboos probably dispersed to Asia from India after the establishment of land connections between the Indian and Eurasian plates. The Neogene bamboos indicate the diversification of their ecological niche during the Miocene in Asia. The present fossils also reveal their adaptation to a monsoonal climate since the late Oligocene.
International Journal of Indian Culture and Business Management, 2017
This study examines both the short-run and long-run relationship among information and communicat... more This study examines both the short-run and long-run relationship among information and communication technology (ICT), economic growth and electricity consumption using annual time-series data for India for the period 1991-2014. All the variables under study are I (1) as per Dickey-Fuller-Generalised least square unit root test results. For cointegration test and causality analysis, we have used autoregressive distributive lag (ARDL) bounds test and vector error correction model (VECM) Granger causality test respectively. ARDL test results suggest that ICT stimulates economic growth in the short-run but not in the long-run, whereas electricity consumption has significant and positive impact on economic growth in the long-run and short-run as well, which supports the energy-led growth hypothesis. However, there is no cointegration when electricity consumption becomes a dependent variable and other variables are independent. Economic growth does not Granger cause electricity consumption in the short-run. These findings suggest that India should focus on ICT expansion to accelerate economic growth in short-run and India should not follow energy conservation policies as it might adversely impact economic growth in both short- and long-run. Instead, India should focus on energy efficient policies. This study has crucial policy implications. Hence, proper balance and coordination among ICT policy, energy policy, and economic growth policy are recommended.
Chemischer Informationsdienst, 1976
Scientific reports, Jan 22, 2017
We report the release of catalytic DNA walkers from hydrogel microparticles and the detection of ... more We report the release of catalytic DNA walkers from hydrogel microparticles and the detection of those walkers by substrate-coated microparticles. This might be considered a synthetic biology analog of molecular signal release and reception. One type of particles was coated with components of a DNA one-step strand displacement (OSD) reaction to release the walker. A second type of particle was coated with substrate (or "track") for the molecular walker. We distinguish these particle types using fluorescence barcoding: we synthesized and distinguished multiple particle types with multicolor fluorescence microscopy and automated image analysis software. This represents a step toward amplified, multiplex, and microscopically localized detection based on DNA nanotechnology.
Journal of Interdisciplinary Histopathology, 2016
Background: Cadmium (Cd) is a toxic heavy metal of both environmental and occupational concerns. ... more Background: Cadmium (Cd) is a toxic heavy metal of both environmental and occupational concerns. The health impact of ethno-botanical approaches in attempts to ameliorate its deleterious effects in biological systems should be an area of scientific interest since established therapies are often burdened with undesirable side effects. Aim: To determine the effects of polyphenol-rich extract of the leaf of Vernonia amygdalina (PEVA) on Cd-induced testicular toxicity, oxidative stress, and histopathology in Wistar rats. Materials and Methods: A total of twenty five (25) male Wistar rats were divided into five groups as follows: Group 1 (Control) received distilled water (0.2 ml/100 g i.p.) for 5 consecutive days and thereafter left untreated for 28 days. Group 2 received Cd alone at 5 mg/kg (i.p.) for 5 consecutive days. Group 3 was pre-treated with Cd as Group 2 and thereafter left untreated for a period of 28 days, whereas Groups 4 and 5 were pre-treated with Cd as Group 2 and thereafter received PEVA (orally) at two dose levels (200 and 400 mg/kg, respectively) for 28 days. Results: Cd administration induced reproductive toxicity as evidenced by lowered level of follicle stimulating hormone, luteinizing hormone, and testosterone (P < 0.05); perturbation of sperm characterization (P < 0.05); deleterious disruptions of the antioxidant system as evidenced by lowered levels of reduced glutathione and superoxide dismutase as well as elevation in thiobarbituric acid reactive substances level (P < 0.05); decrease in relative testicular weight (P < 0.05); and severe disseminated necrosis of the seminiferous tubules with terminally undifferentiated/necrotic cells as revealed by the histopathological examination. These conditions were sustained following administration of the two dose levels of PEVA. Conclusion: PEVA administration is not a suitable therapeutic choice for fertility enhancement in male Wistar rat model of Cd-induced decline in reproductive function.
Officieel Orgaan Van De Historische Vereniging Vleuten De Meern Haarzuilens Jg 4 Nr 4 P 253 256, 1984