Найдено 124
URBAN AREA EXTRACTION AND LAND USE LAND COVER MONITORING OF CHARSADDA DISTRICT, PAKISTAN
Ilyas M., Yasir M., Hossain M.S., khan S.
Earth Science Malaysia, 2022, цитирований: 1,
open access Open access ,
doi.org, Abstract
The research of land use and land cover (LULC) changes aids in the management of environmental sustainability. The study investigates fluctuations in urban development, LULC, and the advancement of an environmentally sound area of Charsadda in Pakistan’s Khyber Pakhtunkhwa province. The method of classification algorithm of maximum likelihood for Landsat 7 and 8 obtained from 2007 to 2019 has been evaluated and carried out for a period of 12 years using a geographic information system and remote sensing data. For the extraction of the urban area and calculating changes in the composite of classed images, the raster Boolean approach has been utilized. To reduce negligible noise objects, post-classification filtering methods have been used. According to the classification findings from 2007 to 2013, the built-up area increased by 13.76 percent. Barren land has seen a 10.12% decline and vegetation has had a 3.73 percent gain, while aquatic bodies have seen a 0.08 percent increase. During the six-year period between 2013 and 2019, the built-up area increased by 11.52 percent, although vegetation (2.49 percent) and bare land decreased rapidly (8.90 percent). Water bodies also decreased by 0.12% at this time. The study’s findings suggest that the most significant changes have been found in built-up land, which increased by 25.29 percent overall between 2007 and 2019, despite a significant reduction in the vegetation zone and bare land. For the years 2007, 2013, and 2019, the total accuracy of land use and land cover classification has been 0.78 percent, 0.79 percent, and 0.76 percent, respectively. The study’s findings reveal a number of important changes in land-use and land-cover patterns in the studied area, which can be used to make recommendations and serve as a foundation for urban planning.
EVALUATION OF TOXIC ELEMENTS IN GROUNDWATER IN THE INDUSTRIES AREA OF NNEWI NORTH SOUTH-EASTERN NIGERIA
K.A I., C.M. O., A. O.
Environmental Contaminants Reviews, 2022, цитирований: 3, Обзор, doi.org, Abstract
Due to the unregulated flow of industrial wastes into the environment, industrial pollution is a major environmental issue in South-eastern Nigeria. It became critical to examine the influence of industrial activity on groundwater quality for home use. Following conventional protocols, twenty-two groundwater water samples were obtained inside the study region. Atomic Absorption Spectroscopy, method was used to determine the chemical compositions of all the samples collected. Groundwater Quality index was employed to evaluate the laboratory result. Potential Toxic Element concentrations in Groundwater for Cr, Fe, Ni, As, Cd, Hg and Al ranged from (0.00 to 0.83ppm, 0.32 to 0.56ppm 0.10 to 0.38ppm, 0.00 to 0.32ppm, 0.00 to 0.01ppm, 0.13 to 0.35ppm, and 0.00 to 1.21ppm) respectively. The various guidelines for water quality and the index revealed that the groundwater was contaminated, basically from anthropogenic sources. It´s recommended that the groundwater should be treated before consumption.
A COMPARATIVE STUDY OF ENVIRONMENT RISK ASSESSMENT GUIDELINES FOR GENETICALLY ENGINEERED PLANTS OF DEVELOPING AND DEVELOPED COUNTRIES INCLUDING BANGLADESH
Mimmi S.F., Islam A.
Science Heritage Journal, 2021, цитирований: 8,
open access Open access ,
doi.org, Abstract
Genetically Engineered (GE) plants are the demand of time for increased need of food. The regulation system, followed from the development of a GE plant to its release into the environment is categorized into separate stages for maintaining the proper biosafety including Environmental Risk Assessment (ERA). ERA identifies potential risks and its impacts through science based evaluation process where it follows a case by case study. All the countries dealing with GE plants follow specific guidelines to conduct a successful ERA. In this study, ERA guidelines of 4 developing and 4 developed countries including Bangladesh were compared in terms of required data and information against ten criteria. Surprisingly, an adequate amount of data and information requirements (e.g. if the intended modification has been achieved or not, growth habit of GE plants, potential adverse effects on the human health etc.) matched between all the countries. However, a few differences of data requirement such as agronomic conventions of non-transformed plants, clear description of experimental procedures followed etc. were also observed in the study. Moreover, the result indicates that only a few countries provide instructions on the quality of the data used for ERA. Thus, if the similarities are recognized in a more framed manner then the approval pathway of GE plants can be shared.
ANTIMICROBIAL RESISTANCE (AMR)-FORECAST FOR 30 COUNTRIES IN EUROPE
M. Jaffar M.Z., N. Zailan A.
Science Heritage Journal, 2021, цитирований: 5,
open access Open access ,
doi.org, Abstract
Antimicrobial resistance (AMR) has emerged among the most serious public health issues, prompting the creation of worldwide implementation strategies. In this study, the application of seasonal or time-series approaches was suggested for forecasting the unknown percentages of resistance towards other microbial groups for seven microorganisms. Annual data between 2012 and 2019 were acquired from European Centre for Disease Prevention, and Control (ECDC) reports. Microsoft Excel’s function, ‘FORECAST.ETS’, was used for prediction purposes. Then, a brief analysis was done on the forecasted results. Forecasting AMR’s percentage makes it possible to develop a strategy for dealing with any situation that may emerge.
BIOLOGICAL TRAITS OF BEAN FLOWER THRIPS, Megalurothrips usitatus (THYSANOPTERA: THRIPIDAE) REARED ON MUNG BEAN
Yasmin S., Ali M., Rahman M.M., Akter M.S., Latif M.A.
Science Heritage Journal, 2021, цитирований: 3,
open access Open access ,
doi.org, Abstract
The bean flower thrips, Megalurothrips usitatus is a major pest of mung bean that causes flower dropping and significant yield loss of the crop. M. usitatus demonstrated to have variable lifespan when reared on different leguminous hosts but on mung bean, an important pulse crop in Bangladesh, is unknown. The experiment was conducted to determine the biological attributes of M. usitatus on mung bean in a climate control chamber at 26 ± 1°C, 75 ± 3% RH, and 16:8 hours L:D in the laboratory. The results revealed that the incubation period, first instar larva, second instar larva, prepupa, and pupal period of M. usitatus were 3.13 ± 0.06, 1.48 ± 0.05, 2.30 ± 0.08, 1.30 ± 0.07, and 2.26 ± 0.13 days, respectively. The combined developmental period from egg to adult was 10.54 ± 0.15 (mean ± SE) days. The larvae of M. usitatus were similar in appearance to the adults, but they lacked wings and were smaller and different in color. The first instar was pale yellow, while the second instar was darker and larger, ranging from deep yellow to orange-red. The wing pads of the prepupae were shorter than that of the pupae. The antennae of the prepupa were straight, but they were bent in the pupa. In the case of pre-adult mortality of M. usitatus, the mortality of the first instar larva was 14.41%, second instar larva 22.77%, prepupa 14.10%, and pupa 65.67%. The pre-adult mortality was 80.51% overall. Adult males had lower longevity (6.42 ± 0.44 days) than females (12.07± 1.56 days). The developmental period of M. usitatus on mung bean indicated the suitability of the leguminous crop as a potential host, as well as the need for information on the pest’s various growth stages in order to design effective management strategies.
A STUDY ON SELECTION OF BALLAST WATER TREATMENT TECHNOLOGIES TO MEET BWM 2004 CONVENTION
Nguyen T.H., Le T.H., Dong T.M., Le V.V.
Q3
Water Conservation and Management, 2021, цитирований: 2, doi.org, Abstract
Ballast water is essential for ship operation. However, it also carries potential risks of contamination and disease transmission. The Ballast Water Management Convention (BWMC) was introduced by the International Maritime Organization (IMO) to minimize the transfer of pathogenic microorganisms to ecologically sensitive marine areas, through ballast of ocean-going ships. Therefore, thorough research and analysis of ballast water treatment technologies are essential. This paper summarizes the existing technologies applied for ballast water treatment. These technologies can be port-based or ship-based, with the latter being easier to implement. Particular attention is given to onboard processing methods, which can be classified as physical separation, mechanical or chemical methods. This work describes recent ballast water treatment studies from the scientific and academic communities since the last IMO Convention in 2004, and the treatment methods that have been approved by the IMO substantially and ultimately. We have examined the various methods currently available in scientific means for ballast water treatment and we conclude that standardization of ballast water treatment still has to be done to ensure IMO Standards.
FOOD WASTAGE: CAUSES, IMPACTS AND SOLUTIONS
Pandey A.
Science Heritage Journal, 2021, цитирований: 14,
open access Open access ,
doi.org, Abstract
Each year one third of all the produced food for human consumption is lost or wasted. Food wastage scales up the number of hungry people throughout the world and impairs the global food security. Food wastage not only decreases the availability of food, it also reduces the resources needed to produce food for future generation. In many low-income countries, there is considerable loss due to poor storage facilities and lack of capacity to transport produced food immediately after harvesting. Confusion arising from the existence and poor understanding of different food date labels are a major indirect causes of food wastage in developed countries. The quantitative and qualitative impacts of food wastage can be addressed through food wastage footprint. The total food wastage accounts for 3.3Gtonnes of CO2 equivalent. Globally, the blue water footprint of food wastage is about 250km3 equivalent to three times the volume of Lake Geneva. Produced but uneaten food occupies almost about 1.4 billion hectares of land; this represents close to 28% of the world’s agricultural land area. It is difficult to estimate the impact on biodiversity at global level. The impacts are assessed through deforestation due to agricultural expansion and species threatened during agricultural practices. Food wastage also leads to loss of economic value of food entities. Each year, 1 trillion USD is lost through food loss and waste at global level. The broad level of causes and impacts enable us to identify number of solutions to reduce food wastage. Improved practices at harvest and post-harvest stages by adopting new technical innovations could be the best way to mitigate losses in developing countries. Consumer’s behavior should be modified to reduce waste at down-stream level. The government and development partners have to develop sustainable initiatives through effective policies and raise awareness among the people to solve food wastage problem.
GENOME SIZE DETERMINATION OF CUCUMBER (CUCUMIS SATIVUS), HONEYDEW (CUCUMIS MELO INODORUS) AND ROCK MELON (CUCUMIS MELO CANTALUPENSIS) VIA FLOW CYTOMETRY
Yumni R.M., Karim M.F., Midin M.R.
Science Heritage Journal, 2021, цитирований: 5,
open access Open access ,
doi.org, Abstract
The family of Cucurbitaceae consists of species with economical and nutritional value. Morphologically, there are only few differences between Cucumis species. The interspecific and intraspecific variation in the genome size of the Cucumis species are not discovered yet. Due to this, this study aims to determine the genome size of C. sativus, C. melo inodorus and C. melo cantalupensis using flow cytometry (FCM) method. Nuclei suspension of selected Cucumis species were extracted using LBO1 lysis buffer by manual chopping technique and stained by propidium iodide priot to FCM analysis. Genome size of C. sativus, C. melo inodorus (Honeydew) and C. melo cantalupensis (Rockmelon) were determined by using Glycine max (Soybean) as an external reference standard (2C = 2.5 pg). This study found that the genome size of C. sativus, C. melo inodorus and C. melo cantalupensis estimated to be 2.83 pg, 3.00 pg and 3.47 pg respectively. The genome size data obtained from this study can be used in future genome studies as well as species characterization.
MADRE DE CACAO (Gliricidia sepium) AND BOTTLEBRUSH (Callistemon viminalis) LEAVES EXTRACT AS MOSQUITO LARVICIDE
M. De Leon J., B. Ison M.J., V. Maningas R.
Science Heritage Journal, 2021, цитирований: 2,
open access Open access ,
doi.org, Abstract
Mosquitoes are major disease vectors, therefore keeping them under control is essential for human health. Insecticides have been shown to be effective at controlling mosquito populations, but insecticide resistance and environmental concerns are increasing. Looking for the health and environment hazards and cost of synthetic insecticides, there is a need to find a safe, practical and effective alternatives. This study aimed to determine the level of effectiveness and the presence of phytochemical analysis of Gliricidia sepium and Callistemon viminalis leaves extracts. It also included the larvicidal effect from the different extract formulations of Madre de Cacao and Bottlebrush at different instar stage of mosquito larvae. It further investigated whether there is no significant difference in the effectivity among the five different formulations of leaves extract. Results of the experiment revealed that 100% Madre de Cacao formulation were found to be very effective in killing mosquito larvae followed by 75%:25%, 50%:50%, 25%:75% while 100% Bottlebrush formulation came out as less effective. Likewise, Madre de Cacao and Bottlebrush contain sterols, flavonoids, alkaloids, saponins, glycosides, tannins and triterpene that have larvicidal impact on mosquito. Finally, a significant difference exists among the different treatments. Madre de Cacao and Bottlebrush maybe recommended as home-based mosquito larvicide which were found to be not hazardous to the health of people in extracting the leaves. A community may build and designate a certain area for plantation and development of Madre de Cacao tree and other plants that potentially source of insecticides specially mosquito larvae that can lessen the harmful effects of using commercial pesticides in controlling mosquitoes.
COPING PRACTICES OF COASTAL FISHERMEN IN RESPONSE TO CLIMATE CHANGE FOR SOUTHERN COASTAL BELT OF BANGLADESH
Barua P.
Social Values and Society, 2021, цитирований: 1, doi.org, Abstract
Climate change impact over the fishermen of an coastal river that flowing over the southern coast of Bangladesh are suffering the increased vulnerability in terms of less stable livelihoods, decreases in the availability of fish catch, and safety risks due to fishing in harsher weather conditions. This study highlights the river-based livelihood and economies of local communities along the Sangu River basin inside Bangladesh in response to climate change induced problem. Adaptation practices by the fishermen of Sangu river was investigated by triangulating semi-structured interviews, household survey data, while the different environmental variables and their fluctuations at five year’s time scales had been compared to detect the bio-physical changes. About 20% fisheries productivity reduced and the annual yield dropped to 162 MT from 850 MT in last fifteen years, which lead to BDT 280 million (80%) revenue loss. Socioeconomic impacts were felt through changes in capture, production and over all income, and possible increases in risks of damage or loss of fishing gears and crafts. Due to the low adaptive capacity, fishers tend to be poorer, more marginalized and losing their occupation.
AUGMENTATION OF SOLAR WATER DISTILLER PERFORMANCE WITH PV/T
Viet Linh Le N., Hieu Le T., Hao Dong T.M., Vang Le V., Tung D.
Q3
Water Conservation and Management, 2020, цитирований: 3, Обзор, doi.org, Abstract
Recently, due to global warming and urbanization, there are many major cities that may face the challenge of day zero next decades. Obviously, water is an indispensable component for maintaining life on the earth. Although portable water is required of the hour, the quantity of available freshwater is impacted significantly by sea-level rise and pollution from industrialization. As a consequence of the global water crisis, different methods for clean water production from brackish water have been studied and developed in practice, however, the solar distillation of water is the most economical and desirable approach due to this method utilize solar energy that is the environmentally friendly and economical resource. Over the last 15 years, the impressive price drop of the photovoltaic solar collector (PV/T) makes them popular and easy to access. As a result, the employment of PV/T in solar stills is emerging as a potential device for water distillation. Therefore, in this paper, an active solar distiller combined with a photovoltaic panel has been reviewed for improvement of the distillate yield and effectiveness of solar photovoltaic. This review work presents a variety of studies on various types of solar still (for example conventional solar still (CSS), double slope solar still (DSSS), stepped solar distiller, and cascade solar still) couples with different solar water collectors (such as flat plate collector (FPC) and evacuated tubes collector (ETC)) and solar photovoltaic modules. It is obtained that the hybrid PV/T active solar still improves the distillate yield, energy efficiency, and exergy efficiency as compared to passive mode. The cooling method enhances the performance of the photovoltaic solar collector as well as the productivity of solar still. Moreover, the environmental economic estimation reveals that the solar still coupled with the PV/T mitigated considerably the amount of CO2. It can be stated that it is suitable to commercialize the hybrid PV/T active solar still for supplying not only electricity but drinking water also. Finally, this review paper also suggests the scope for the research in the future.
SEDIMENTARY ARCHITECTURAL ELEMENTS AND SANDY BRAIDED FLUVIAL SUCCESSIONS IN AJALI SANDSTONE RIDGES, WESTERN AFIKPO BASIN, UTURU, NIGERIA
Oyanyan R.O., Ohaegbulem M.C., Agbo C.C., Iloanya N.S.
Earth Science Malaysia, 2020, цитирований: 1,
open access Open access ,
doi.org, Abstract
Lithofacies, bounding surfaces and sedimentary architectural elements exposed in two ridges at Uturu being quarried for construction sands were analysed to determine the paleoenvironment of deposition and the factors that control the deposition of sand units. Mainly outcropped is Ajali Formation overlying locally exposed Mamu Formation in Western Afikpo basin. Lithofacies identified include: Trough cross bedded medium- to coarse-grained (St), Planar cross bedded fine- to coarse-grained sandstone (Sp), Small scale planar cross bedded sandstone (SSp), Lenticular mudstone (Fm), Heterolithic sandstone/mudstone (Fsm), Horizontal stratified sandstone (Sh), Cross ripple laminated sandstone (Sr), Reddish muddy sand (Fl), Siltstone (SSm) and Shale (Fsh). The associations of lithofacies and bounding surfaces gave four fluvial and one marine architectural element. The fluvial elements which mainly characterized the Ajali Formation include: Channel-fill (CH), Macroforms Accretion (MA). Flood-Plain Fines (FF) and Channel Abandonment Fines (CAF). Offshore-shoreface fines (OSF) element defined marine Mamu Formation. The profiles of the ridges show dominance of MA followed by CH while FF is limited in occurrence and in some zones pinch-out to lenticular inter-bar mudstone. The MA is characterized by planar cross beddings, reactivation surfaces, internal grading, steep dipping ferruginized accretion surfaces and abrupt flat top which indicate mid-channel bars deposition in typical sandy braided fluvial depositional system. Generally, there is vertical aggradation/ amalgamation of channel deposits and dominance of sheet alluvial architecture. Low rate of channel avulsion, moderate rate of lateral migration and aggradation, variable discharge rate and high rate of sediment supply and subsidence were considered as factors that controlled the deposition and preservations of sand units. This study provided an understanding of mesoscopic heterogeneities and compartmentalization style inherent in hydrocarbon bearing sandy braided reservoirs which can be used as analog model for its development.
LAND USE AND LAND COVER CHANGE DETECTION BY USING REMOTE SENSING AND GIS TECHNOLOGY IN BARISHAL DISTRICT, BANGLADESH
Salman M.A., Nomaan M.S., Sayed S., Saha A., Rafiq M.R.
Earth Science Malaysia, 2020, цитирований: 3,
open access Open access ,
doi.org, Abstract
Barishal has recently gone through intense land use and land cover changes (LULC). This study aims to assess the changes of land use of Barishal, which were surveyed from 2000 to 2020 by utilizing Landsat TM, ETM + & OLI-TIRS imageries. The ArcGIS-10.4 & the ERDAS-14 Imagine software were used to deal with satellite images and surveyed measurable data for land cover change evaluation of the study area. Both pre- and post-classification change detection scenarios and NDVI analysis were observed to assess the change result from 2000 to 2020. Maximum likelihood classification was utilized to create unsupervised land cover category (water body, urban, fallow, agriculture, vegetation and lowland). After ensuring acceptable value for each classified image (82.16% for 2020, 76.15% for 2010 & 70.96% for 2000 with Kappa values of 0.64, 0.62 & 0.62 for 2020, 2010 and 2000), a change detection study was performed. This study discovered that the highest growth 69.22% of urban area has been improved within 20 years followed by 49.75% and 21.74% of water bodies, fallow lands; whereas the annual change rate was 14.95%, 7.91% and 10.31% respectively. In contrast, 16.28%, 10.48% and 37.20% of vegetation, agriculture and lowland had been reduced and an (-) annual change rate of 16.03%, 7.15% and 9.99% respectively. In addition, NDVI analysis was also observed a decreasing trend of the vegetation and agricultural lands. The results of this assessment could be supportive to design and appliance significant managing appraisals to protect the agricultural degradation, fruitless urbanization of Barishal district.
A PRELIMINARY REVIEW ON THE METALLOGENY OF SEDIMENT-HOSTED PB-ZN DEPOSITS IN BALOCHISTAN, PAKISTAN
waliArain A.Y., Mastoi A.S., Daahar Hakro A.A., Rajper R.A., Jamali M.A., Bhatti G.R., Bhatti W.
Earth Science Malaysia, 2020, цитирований: 2,
open access Open access ,
Обзор, doi.org, Abstract
Lead and Zinc deposits are very much important economic booster for the country all over the world. Economic geologists are engaged in the search of these economy booster minerals and rocks for three decades. Lead and zinc are profuse resources in the Lasbela-Khuzdar belt of Balochistan province of Pakistan, with reserves of about 50 million tons all over the country. In this paper, we have presented field observations of the Dudder mine area and summarised the work of earlier papers to provide the salient features of these ore mineralizations and deposits. The tectonic settings and important ore controls have been discussed based on field observations and previous work. The Pb-Zn dominantly occupied by exposures of rocks of the Ferozabad Group of Jurassic age in the Mor range, which is comprised of Lower-Middle-Upper Jurassic carbonates and deep-marine siliciclastics rock sequence. This group contains syngenetic and epigenetic Pb-Zn mineralization classified as a stratiform replacement, and vein-type fissure fillings observed at various places of Duddar, Gunga, and Surmai deposit areas. Generally, these deposits are hosted pyrites nuggets with fine-grained sphalerite matrix with galena in black shale, argillaceous limestone, and mudstone. We construct a Pb-Zn deposit predictive tectonic model that regards mineralization as the primary factor and the ore rock as secondary. The tectonics were more active when sedimentation of the Anjira Formation started in a disturbing third-order basin. The Hydrothermal solution comes into the basin along faults and gave rise to syngenetic mineralization of sulfides in the Anjira Formation, and epigenetic one in the underlying Spingwar and Loralai Formations. These deposits are considered as SEDEX deposits according to the distribution of Pb-Zn deposits, we concluded that a multi-period, multi-cycle orogenic environment is the most positive for lead-zinc deposit growth. With this, we analyze the association between tectonic evolution, geological mineralization, and Pb-Zn metallogenic epoch. The tectonic and mineralization mechanism models are expected to ease the detailed study on the geological and geochemical conditions of mineralization in the Ferozabad Group and economic assessment of the resources.
GEOCHEMICAL INVESTIGATION OF THE EARLY EOCENE LAKI FORMATION SHALES IN THE SELECTED REGIONS OF SOUTHERN INDUS BASIN PAKISTAN
Asghar H., Khan M.S., Abbas S., Hussain G., Ahmed W., Ali A., Ali M., Hassnain M.
Earth Science Malaysia, 2020, цитирований: 1,
open access Open access ,
doi.org, Abstract
A systematic geochemical investigation of the Laki Formation from the selected regions of Southern Indus Basin Pakistan Basin has been carried out. This paper presents the characterization of hydrocarbon potential, type of kerogen, thermal maturity, the origin of organic matter, depositional environment, and bulk mineralogy of the Laki Formation shales. The total organic carbon (TOC) content of the Laki shale ranges from 0.53 to 2.66 wt. %. The values indicate that Laki shales have fair to very good hydrocarbon potential. Type III kerogen is identified in the Laki shale based on TOC and residual potential (S2) data. Maturity parameters (Tmax & Methyl phenanthrene index) suggest that Laki shales are thermally immature for the generation of hydrocarbons. Normal alkane data and stable carbon (δ13C) isotopic value (-9.67 ‰ PDB) of the Laki shale indicates the predominantly marine origin of the organic matter. Dibenzothiophene/phenanthrene (DBT/P) ratio (0.08), Phytane (Ph)/n-C18 versus Pristane (Pr)/n-C17, and Pr/Ph versus DBT/P data suggest a marine environment of the Laki shale. The marine setting of the Laki Formation shale is further evident by coralline algae and Alveolina oblonga. X-ray diffraction (XRD) data reflect that Laki shale is brittle since it is dominated by high quartz and carbonates.
THE INITIAL ION EFFECT OF HEAVY METALS ADSORPTION BY USING HYDROTHERMAL CARBONIZATION BANANA PEELS
Said Mohd N., Mohamed R.M.
Environmental Contaminants Reviews, 2020, цитирований: 2, Обзор, doi.org, Abstract
Accumulation of heavy metals in water is of particularly important because it can impact upon human health through possible contamination of food. The use of banana peel was investigated. Hydrothermal carbonization (HTC) was chosen as alternative process. The objective of this project is to synthesize banana peel hydrochars adsorbent via HTC process and to evaluate the heavy metals adsorption performance of banana peel hydrochars adsorbent. Conventional methods in removal of heavy metals require high operational cost, need highly skilled labour, and generate sludge at the end of the operation. Compared to other techniques, banana peel absorbent is a cost- effective adsorbent, easy to operate, environmentally safe and no health risk for the operator. Besides, large quantity of banana peel waste contributes to its significant disposal problem. Thus, this study is expected to solve problems of banana peel, by preparing banana peel adsorbent through hydrothermal carbonization. There are three phases in this project, phase 1 which is synthesis of banana peel based on hydrochars, banana peel was chopped the peels into small pieces. It was then soaked in KOH solution for 2hours and transferred into PTFE and heat for 2hours at 230°C. For phase 2, physico-chemical characterization of banana peels hydrochars by using FTIR. The result obtained shown that all of the content in banana peels will activate the surface of banana peel to enhance the adsorption of the heavy metals. For the final phase, by using AAS, the initial and final concentration of the metals was tested to determine the removal of heavy metals by the prepared hydrochars. The results showed that the removal capacity of the hydrochars increased when the initial concentration of the metals increased. From the research, it can be concluded that, as the initial concentration of the metals higher, the ability of the hydrochars to remove the metals also higher and stronger.
PHYTOCHEMICALS FROM MYRISTICA DACTYLOIDES GAERTN
Sathasivampillai S.V., Rajamanoharan P.R., Varatharasan S.
Science Heritage Journal, 2020, цитирований: 4,
open access Open access ,
doi.org, Abstract
Myristica dactyloides Gaertn. is an endemic plant species to Sri Lanka and it belongs to Myristicaceae family. M. dactyloides is a medicinal plant that is used to treat various illnesses in traditional medicine in Sri Lanka. There is no review published for M. dactyloides. Thus, this works aims summarize and present a comprehensive review including the phytochemistry of this plant species. This work would provide a foundation for further studying the phytochemistry and pharmacological activities of M. dactyloides. Web of Science (an electronic database) was utilized to identify relevant published work. A sum of 21 compounds have been found in various parts of M. dactyloides belong to classes like arylalkanone and lignan. More compounds were identified from stem bark. Compounds including Malabaricone A have been identified in both seed and stem bark. On the other hand, this is no scientific evidence available for any pharmacological activity study for ethnomedical uses. This work provides a basis for further studying the phytochemistry and pharmacological activities of this plant.
MAIZE (ZEA MAYS) PRODUCTION UNDER DIFFERENT IRRIGATION TREATMENTS: INVESTIGATING THE GERMINATION AND EARLY GROWTH
Noor R.S., Hussain F., Saad A., Umair M.
Science Heritage Journal, 2020, цитирований: 1,
open access Open access ,
doi.org, Abstract
Maize (Zea mays) is one of Pakistan’s most important cereal crops and is widely used both for human consumption and for livestock feed. Seed germination, its morphological growth and yield depends on irrigation sequence. Rainfall is the only source of irrigation in Potohar region, Rawalpindi which mainly restrained sustainable agricultural practices. Therefore, a study was planned to investigate the effect of different irrigation frequencies (1-day, 3-days and 5-days interval) on germination and early growth of maize at Koont research station, PMAS-Arid Agriculture University, Rawalpindi during 2019 and 2020 crop seasons. The results elucidated that the continuous application of enough moisture via irrigation in 3-day interval enhance relatively higher (50%) percentage of germination followed by one day interval (43.75%). The enough moisture at five-day interval enhanced germination performance (68.75%). No significance effect was found on number of maize seedlings emergence while a considerable variation was observed on their emergence date, that the early emergence of maize seeds was enhanced in 1-day interval. As irrigation frequency decreased from 1 to 5 days interval, seedling emergence was delayed significantly (p<0.05). This indicated that a continuous application of enough water to the soil and maintaining soil moisture enhance the emergence of maize seeds to be takes placed earlier.
GEOCHEMICAL ASSESSMENT OF TRACE METALS IN SOIL, STREAM WATER AND SELECTED FOOD CROPS AT KIBI GOLDFIELDS ENVIRONMENT, GHANA
Siaw D.B., Gidigasu S.S., Andrews A., Gikunoo E., Foli G.
Earth Science Malaysia, 2020, цитирований: 5,
open access Open access ,
doi.org, Abstract
This study assesses environmental receptors impacted by alluvial gold mining at Kibi Goldfields Limited in the Eastern region of Ghana to establish trace metals contamination risk. Specific objectives are to determine concentrations of (1) As, Cr, Ni and Pb in soils, drainage and food crops, using X-ray fluorescence, (2) Cl- in drainage using standard methods. Mean concentrations of As, Cr and Ni in soils are higher at impacted sites than control sites; while Pb and As concentrations in drainage exceeds the maximum contamination guideline values in drinking water. Using Cl- as a conservative tracer, As and Pb are adsorbing from water, while Cr and Ni are desorbing into water. In the food crops, bioaccumulation factors of As and Ni are profound at the impacted site than control sites; Except Cr in cocoyam at impacted sites, translocation factors are negligible in the food crops. Cr bioaccumulates in in cocoyam and plantain at the control site, while Ni bioaccumulates in only plantain at the impacted sites. Overall, the metal contamination is of concern in the receptors, except Pd in plants. Results from this study can be used for trace metals risk assessment in the environment.
MOLECULAR DIAGNOSTIC APPROACHES FOR PLANT PATHOGENS DETECTION AND DISEASE MANAGEMENT
Paudel M., Parajuli K., Parajuli S., Regmi S.
Science Heritage Journal, 2020, цитирований: 1,
open access Open access ,
doi.org, Abstract
Every year huge crop losses occur due to different pathogens and disease. The traditional method of pathogen detection, which is still in practice, through visual examination is not always precise. Early detection of plant pathogens prior to severe infection is very crucial which is possible through molecular diagnostic approaches and nucleic acid-based tests. As the genetic materials are the ultimate information storage sites in living organism, their exploration through the use of nanotechnology provides the path forward for the three Ds of genomic analysis of pathogens: Diversity, Detection, and Disease diagnosis. Molecular detection method is not only precise and accurate but also faster and easier approach. Pathogen detection through PCR based tests, microarray technology, multiplexing, gene sequencing, genetic markers play a pivotal role in timely detection of causatives and take proper action to prevent the pandemic in plant population and safeguard against possible risks and famine. It is of utmost importance to prioritize such methods to detect plant pathogens, to increase our understanding of ecology and epidemiology and to prevent the spread of inoculum prior to disease spread. The application of novel diagnostic methods to inoculum detection will guide towards better understanding of the temporal and spatial dynamics of epidemic development, and open up new opportunities for disease forecasting and management.
AN EXPLORATION OF LAND ZONING OF CORAL ISLAND OF BANGLADESH FOR REDUCING THE VULNERABILITY OF CLIMATE CHANGE
Barua P., Rahman S.H., Mitra A., Zaman S.
Earth Science Malaysia, 2020, цитирований: 4,
open access Open access ,
doi.org, Abstract
Saint Martin is an only tropical island of Bangladesh having coral and adjacent rich biodiversity which is built of organic material derived from associate organism of coral ecosystem. Present study was conducted to developed the exclusive zoning plan that based on the specific goal of managing natural resources of St.Martin’s island. . The authors mentioedn that it is important to recognize that the current zoning plan is based on the assumption that conservation and sustainable use of natural resources are the primary objectives. This is found that climate Change is now affecting the biodiversity of ST. Martin island and coral reef diversity hampering due to vulnerability of environmental degradation and climate change. The authors mentioned that, participation and involvement of island inhabitants should required to prime concern for successful implementation of the effective zoning management plan. Desired level of usage can be achieved through interventions, but only in consultation and active cooperation and participation with local communities, with a clear recognition that additional environmental, biological, socioeconomic and sociopolitical data are required for an effective management and conservation of corals and other marine biodiversity of St. Martin’s island through proper implementation of zoning and Marine Protected Area.
A PRACTICAL STUDY ON THE CONSTRUCTION OF HIGH-QUALITY MEDICAL HUMANITIES GOLD COURSE UNDER INTERNET BACKGROUND
Shi T., Li C., Zhang X., Cui X., Wang F.
Social Values and Society, 2020, цитирований: 1, doi.org, Abstract
With the development of the Internet, modern educational technology has brought about great changes in educational ideas and methods. Medical humanities course is an important part of medical curriculum. How to give full play to the advantages of the Internet and promote the quality of medical humanities courses is related to the training quality of modern medical talents. From the perspective of the advantages of Internet background, teaching design and teaching form, this paper discusses how to build internet medical humanities course, which aims to improve the quality of medical humanities course construction.
GEOCHEMICAL CHARACTERISTICS OF GOLD-BEARING GRANITOIDS AT AYANFURI IN THE KUMASI BASIN, SOUTHWESTERN GHANA: IMPLICATIONS FOR THE OROGENIC RELATED GOLD SYSTEMS
K. Agbenyezi T., Foli G., Gawu S.K.
Earth Science Malaysia, 2020, цитирований: 6,
open access Open access ,
doi.org, Abstract
This study investigates auriferous granitoids from the Esuajah and Fobinso pits within the Ayanfuri environment in the Paleoproterozoic Kumasi basin. The aim is to establish the geochemical characteristics of the granitoid gold ores and the possible deposit type which may influence mineral project development. 13 major and 51 trace elements were analyzed using XRF and ICP-MS devices, respectively. The granitoids are mainly classified as granodiorite that crystallized from a calc-alkaline magma series. The Fobinso granodiorite derived from the partial melting of the Birimian metasedimentary rocks, while the Esuajah granitoid derived from igneous rock melts. The granitoid are linked to magma source depleted in mantle material that contains crustal components through subduction processes. Major oxides of the granitoid vary lowly from the average background values derived for basin type granitoid in such terrains. Generally, the granitoid are enriched in Large Ion Lithophile Elements (LILE), while High Field Strength Elements (HFSE) and base metals are within background values when compared to Primitive Mantle (PM) values. Gold mineralisation is associated with Ag, As, Bi, Sb, Te, Pb and S in the peraluminous granitoids. Geochemical characteristics and field observations identify the deposit style as an orogenic related gold deposit type.
PETROGRAPHY AND GEOCHEMISTRY OF SOME PALEOPROTEROZOIC GRANITOIDS AT THE NORTH-EASTERN MARGIN OF THE KUMASI BASIN IN GHANA
A. Brako B., Foli G., Ansah K.A., Aikins D., Dery S., Gawu S.K.
Earth Science Malaysia, 2020, цитирований: 2,
open access Open access ,
doi.org, Abstract
This study investigates basin-type granitoid samples from the north-eastern margin of the Kumasi Basin in Ghana to establish their source and geodynamic setting. Petrographic analysis, TAS and A/NK-A/CNK plots classify the granitoids as metaluminous quartz diorite, metaluminous granodiorite, and peraluminous monzogranite; and exhibiting I-type signatures. These rocks are formed by magma differentiation and/or partial melting at various stages. Distribution patterns of incompatible elements and the positive Eu/Eu* anomalies of 1.15 and 1.47 exhibited by quartz diorite and granodiorite, respectively, the values suggest the rocks crystallized from melts formed in a water-saturated environment. The negative Eu/Eu* anomaly exhibited by monzogranite indicate fractionation of plagioclase in the final stages of the magma evolution. The water-rich environment is probably due to dewatering of the basin’s foreland volcaniclastic sediments during regional subsidence, burial and metamorphism. K2O enrichments and wide variations suggest that the granodiorite and monzogranite are formed from fractional crystallization and/or crustal assimilation of the continental crust by under-plating dioritic magma. The higher Al2O3/TiO2 enrichment and the shift from metaluminous to peraluminous in the monzogranite suggest a longer residence time within the continental crust, during which fractional crystallization and the assimilation of pre-existing crustal components into the dioritic magma that resulted in the formation of the monzogranite. The study requires replication at other areas within the basin to generate enough data to enhance metallogenic studies in the terrain.
LAND USE CLASSIFICATION AND MAPPING USING LANDSAT IMAGERY FOR GIS DATABASE IN LANGKAWI ISLAND
A. Z., A. N.S., M. R. N.S., M. M.Z.
Science Heritage Journal, 2020, цитирований: 2,
open access Open access ,
doi.org, Abstract
This study examined the land use changes in Langkawi Island for over 12 years. Land use maps were derived by analysing temporally available satellite imageries of that area. Subsequent Landsat imageries of the years 2006, 2014 and 2018 were processed in Environment for Visualising Images (ENVI) software using Normalize Differences Built-Up Index (NDBI) and supervised classification. The land use classes obtained were categorised according to the Soil and Water Assessment Tool (SWAT) land use classification namely URLD, URMD, URHD, FRSE, UINS, UIDU, URTN, RICE, AGRR, and WATR. The analysis of the land use maps provides a comparison for the area of land use class around Langkawi Island based on the Rancangan Kawasan Khas 2020 (RKK). This study will give an overview of the stakeholder on the current land use of Langkawi Island for future land use planning. Moreover, the land use map generated in this study can be used as a functional land use input for the SWAT model and provide a temporal Geographic Information System (GIS) database on the land use of the Langkawi Island.
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