Journal of the Asiatic Society of Bangladesh, Science最新文献

{"title":"Estimation of Carbon Stock in the Peat Soils of Bangladesh","authors":"M. Uddin, A. Mohiuddin","doi":"10.3329/jasbs.v45i1.46574","DOIUrl":"https://doi.org/10.3329/jasbs.v45i1.46574","url":null,"abstract":"There are a very few study on the estimation of carbon stocks in the peat soils of Bangladesh. There are three categories of peat soils in Bangladesh: Sapric peat, Hemic peat and Fibric peat. A study was conducted in these three kinds of peat soils at 100 cm depths regarding their stock. The study shows that the carbon in peat soils is about 0.12 Pg whereas it was about 0.25 Pg during 1970s. So, it was found that soil organic carbon loss is alarming and it has been reduced by half during 50 years of agricultural intensification in Bangladesh. These peat soils are losing their carbon due to the decrease of inundation level by climate change, intensive agricultural use and even fuel use for cooking purposes by the local stakeholders. So, it is very much urgent to take steps in preserving the peat soils of Bangladesh. \u0000Asiat. Soc. Bangladesh, Sci. 45(1): 127-136, June 2019","PeriodicalId":186946,"journal":{"name":"Journal of the Asiatic Society of Bangladesh, Science","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123940440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanism of the Absorption of CO2 in Ionic Liquid Dimer","authors":"K. Dhar","doi":"10.3329/jasbs.v45i1.46575","DOIUrl":"https://doi.org/10.3329/jasbs.v45i1.46575","url":null,"abstract":"The density functional theory (DFT) calculations with the modern continuum solvation model (IEFPCM-SMD) was used to study the mechanism of CO2 absorption at room temperature using ionic liquid such as, [EMIM][BF4] (1-ethyl-3-methylimidazolium tetrafluoroborate) monomer and dimer ionic liquid [IL] dimer comprises two couple of anions and cations, so that more intermolecular interactions are established than in the single IL pair. In this paper, we determined the minimum energy structures and to determine the possible binding sites for CO2 absorption in [EMIM][BF4] monmer and dimer; by comparing the relative minimum energy of [EMIM][BF4] in the presence and in absence of CO2. It was found that CO2 is stabilized by the multiple interactions with several anions. When CO2 penetrates the IL monomer or dimer, through gas-to-liquid diffusion, the O-C-O (CO2)-BF4 intermolecular bond is likely to be formed immediately and bind the CO2 molecule. This result suggests that ionic liquid dimer is suitable for the absorption of CO2. \u0000Asiat. Soc. Bangladesh, Sci. 45(1): 137-144, June 2019","PeriodicalId":186946,"journal":{"name":"Journal of the Asiatic Society of Bangladesh, Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116030519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In Vitro Screening of Fungicides and Plant Extracts Against Colletotrichum Gloeosporioides (Penz.) Sacc. the Causal Agent of Anthracnose Disease of Rauwolfia Serpentina (L.) Benth Ex Kurz","authors":"Zuhra Yasmin, S. Shamsi","doi":"10.3329/jasbs.v45i1.46568","DOIUrl":"https://doi.org/10.3329/jasbs.v45i1.46568","url":null,"abstract":"Ten fungicides viz., Amcogin 50 WP, Autostin 50 WDG, Capvit 77 WP, Dithane M 45, Greengel 72 WP, Haybit 80 WG, Oxivit 40 SC, Ridomil Gold MZ, Sulcox 50 WP and Tilt 250 EC at 100, 200, 300, 400 and 500 ppm concentrations were tested against, Colletotrichum gloeosporioides (Penz.) Sacc., the causal agent of anthracnose disease of Rauwolfia serpentina (L.) Benth ex Kurz following poisoned food technique. Amcogin, Autostin and Tilt showed complete growth inhibition of C. gloeosporioides at 100 ppm concentration. Ethanol extracts of ten plants viz., Adhatoda vesica, Azadirachta indica, Citrus limon, Curcuma longa, Lantana camara, Moringa oleifera, Ocimum sanctum, Psidium guajava, Thuja orientalis and Vitex negundo were selected to evaluate their efficacy at 5, 10, 15 and 20% concentrations against the same pathogenic fungus. Out of the ten plant extracts, Azadirachta indica, Citrus limon, Moringa oleifera and Psidium guajava showed complete radial growth inhibition of C. gloeosporioides at 20% concentration. Amcogin, Autostin, and Tilt are suggested as best inhibiting chemical fungicides for C. gloeosporioides. Extracts of A. indica, C. limon, M. oleifera and Psidium guajava were also found to be superior to other plant extracts tested in controlling the test pathogen. \u0000Asiat. Soc. Bangladesh, Sci. 45(1): 35-43, June 2019","PeriodicalId":186946,"journal":{"name":"Journal of the Asiatic Society of Bangladesh, Science","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127434195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Floristic Study in Lalpur Upazila of Natore District, Bangladesh: Identification, Distribution and Economic Potential","authors":"M. Rahman, Sharika Hassan, M. Begum","doi":"10.3329/jasbs.v45i1.46571","DOIUrl":"https://doi.org/10.3329/jasbs.v45i1.46571","url":null,"abstract":"Floristic study in Lalpur Upazila of Natore district has identified 216 species distributed in 173 genera and 72 families, of which Magnoliopsida (Dicotyledons) is represented by 188 species under 147 genera and 60 families, while Liliopsida (Monocotyledons) is constituted by 28 species under 26 genera and 12 families. In Magnoliopsida, Asteraceae is the largest family represented by 16 species, whereas in Liliopsida, Poaceae is the largest family consisting of 8 species. The genus Solanum is the largest in Magnoliopsida, whereas Cyperus is the largest genus in Liliopsida. Habit analysis reveals that herbs are represented by 118 species (55%), shrubs by 32 species (15%), trees by 50 species (23%) and climbers by 16 species (7%). Potential of the angiospermic flora has been recognized by the occurrence of 57 medicinal plant species which are used over 30 diseases for the primary health care of the local people of Lalpur Upazila. Though the study area is floristically rich, some plant species are under threats. The rare and medicinally as well as economically important species to this area need to be conserved through both in-situ and ex-situ approaches for sustainable development. \u0000Asiat. Soc. Bangladesh, Sci. 45(1): 71-91, June 2019","PeriodicalId":186946,"journal":{"name":"Journal of the Asiatic Society of Bangladesh, Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131036825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geological and Geophysical Observations to Determine the Gas Seepage Source of Titas Gas Field Region, Bangladesh","authors":"Sourov Datta Bijoy, Yousuf Gazi, S. Kabir, Badrul Imam","doi":"10.3329/jasbs.v45i1.46572","DOIUrl":"https://doi.org/10.3329/jasbs.v45i1.46572","url":null,"abstract":"Titas Gas Field, the largest gas field in Bangladesh, has been encountering gas seepages in numerous points at the surface in an area of about 7 sq. km. at the southeastern part of the field since 2006. Gas has been seeping through the water wells, small and large holes in the fields including agricultural lands, in the river and through the cracks in the ground. The present research attempts to point out the source of the gas seepages based on the field studies, wireline log analyses and other available borehole data. A reconnaissance resistivity survey has been carried out around the high seepages area to detect any evidence of shallow subsurface fault. No fault was detected by resistivity survey in the shallow depth in the seepage area and thus fault as a conduit for the seepage could not be confirmed. Primarily, all wells of Titas Well Location (TWL-C) (Titas-06, 08, 09 and 10) were suspected as possible source wells as the surface distribution of seepages generally clusters around TWL-C. Titas-06 and Titas-08 were taken out of suspect list as the gas seepage distributions do not follow well path and cement bonding against reservoir sands including ‘A’ sand in these two wells are also good. Gas seepages follow the well trajectories of Titas-09 and 10 wells but cement bonding against ‘A’ gas sand in Titas-09 also discarded the well as a probable source of the gas seepage. Also, the suggestion that Titas well-03 could be a source of gas seep is also ruled out because of the fact that it is located 3 km away from the seepage area, there is no evidence of any seepage in between the well 3 and the seepage area, and the gas sands are also well protected. The above evidences turned the whole focus onto Titas-10. Gamma ray, resistivity, density, sonic and neutron log signatures recorded initially in the Titas-10 well strongly indicated a major gas sand and has been designated ‘A1’ gas sand. On the basis of various logs including CBL/VDL log it is evident that about 23 meters (3157-3180-meter MD) gas sand at the top which is not protected by cement. It is most likely source of gas seeps in Titas gas field is the gap in the cement protection at the top of A sand in Titas-10 well. \u0000Asiat. Soc. Bangladesh, Sci. 45(1): 93-109, June 2019","PeriodicalId":186946,"journal":{"name":"Journal of the Asiatic Society of Bangladesh, Science","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117253977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impacts and Challenges Associated With Shrimp Cultivation in Parulia Union, Satkhira, Bangladesh: an Empirical Study","authors":"S. Prodhan, Bivuti Bhushan Sikder, Mahbuba Nasreen","doi":"10.3329/jasbs.v45i1.46570","DOIUrl":"https://doi.org/10.3329/jasbs.v45i1.46570","url":null,"abstract":"This paper offers an overview of an empirical study conducted at Parulia union in Satkhira district, Bangladesh on unplanned shrimp culture, practiced by masses that ultimately led to serious environmental degradation and socioeconomic consequences such as salinity intrusion, decline in water and soil qualities, reduction in agricultural productions, decrease in cattle production, migration, and human health hazards. The real scenarios give evidences of the impacts of imposed shrimp cultivation and the associated challenges faced by the communities including reduction in cultivable land area (59.8%), increase of Gher area (48.0%), increase of soil salinity (74.5%), reduction in vegetable production (67.6%), reduction in agriculture farming (67.6%), reduction in freshwater fish culture (63.7%), impacts on livelihood patterns and reduction in local varieties of crops, fruit trees, and plants. Major challenges identified by the respondents are: reduction in soil quality (41.2%), reduction in water quality (38.2%), social problems (20.6%), problems in getting safe drinking water (19.6%), landlessness (35.3%), migration (34.4%), outbreak of common diseases (19.6%) etc. Urgency of a national policy framework addressing the issue holistically is of grave importance to solve the problem. \u0000Asiat. Soc. Bangladesh, Sci. 45(1): 55-69, June 2019","PeriodicalId":186946,"journal":{"name":"Journal of the Asiatic Society of Bangladesh, Science","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133430974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pesticide Residue Analysis in Pond and Canal Water Samples From the Coastal Region of Bangladesh","authors":"M. A. Uddin, M. H. Rashid, N. Chowdhury, M. Nesha, M. Choudhury, Miftahur Rahman","doi":"10.3329/jasbs.v45i1.46576","DOIUrl":"https://doi.org/10.3329/jasbs.v45i1.46576","url":null,"abstract":"Abstract Not Available \u0000Asiat. Soc. Bangladesh, Sci. 45(1): 145-149, June 2019","PeriodicalId":186946,"journal":{"name":"Journal of the Asiatic Society of Bangladesh, Science","volume":"147 20","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114060334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development, Host Preference and Leaf Consumption of the Lime Swallow Tail Butterfly, Papilio Polytes Romulus Cramer (Papilionidae: Lepidoptera) on Citrus","authors":"Mmh Khan, M. Molla, Mushfika Rahman","doi":"10.3329/jasbs.v45i1.46573","DOIUrl":"https://doi.org/10.3329/jasbs.v45i1.46573","url":null,"abstract":"Studies were conducted to know the developmental period and host preference of the lime swallow tail butterfly, Papilio polytes romulus Cramer and leaf consumption by its larvae on citrus in the laboratory. Ten Citrus host plants such as Kagoji lime-BAU-1, BAU-2, BAU-3, BAU-4, BARI kagoji, elachi lime, sweet orange, orange, jamir and Pumelo were used as study materials. Results revealed that the most preferred host of Papilio polytes romulus L. was Elachi followed by BAU-3 and Orange while the least preferred host was Pumelo. Eggs were pale yellow and spherical. The average length of newly hatched caterpillars, 2nd, 3rd, 4th and 5th instar larvae were 2.32 mm, 10.75 mm, 14.50 mm, 24.80 mm and 39.50 mm, respectively. The mean duration of 1st, 2nd, 3rd, 4th, 5th instar larvae and pre-pupa were 2.20, 2.15, 2.35, 2.25, 2.35 and 1.0 days, respectively. The average length of the pupal stage, adult male and female butterfly were 29.50, 24.00 and 25.75 mm, respectively. The mean longevity of female and male was 6.5 and 3.9 days. The percentage of leaf area consumed was increased with increasing the age of larvae. The highest percentage of leaf area was consumed by the 5th instar larva (100) followed by 4th instar (75) while the lowest percentage of leaf area was consumed by the 1st instar larva (15) in 72 hours after release. \u0000Asiat. Soc. Bangladesh, Sci. 45(1): 111-125, June 2019","PeriodicalId":186946,"journal":{"name":"Journal of the Asiatic Society of Bangladesh, Science","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132773929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Breeding Birds at the Chittagong University Campus of Chittagong in Bangladesh","authors":"M. F. Ahsan, Manirul Islam","doi":"10.3329/jasbs.v45i1.46566","DOIUrl":"https://doi.org/10.3329/jasbs.v45i1.46566","url":null,"abstract":"A study on the breeding birds in the Chittagong University Campus (CUC) of Chittagong, Bangladesh was carried out, through direct field observations during January to Junee 2011. Fifty-five species of birds belonging to 27 families under 11 orders were observed to breed in the CUC. A total of 819 breeding pairs of birds were recorded, of which 25 (45.45%) species were passerines and 30 (54.55%) nonpasserines. Among the breeding birds, the Asian pied starling (Gracupica contra) was the highest in number/frequency, comprised 128 (15.63% of the total) pairs and yellow footed green pigeon (Treron phoenicopterus) was the lowest, 1 (0.12% of the total) pair. Among the 27 families, Family Corvidae comprised the highest number of breeding species (7, 12.73%); Family Sturnidae and Passeridae had 4 species each (7.27%); while 4 families included 3 (5.46%), 7 families had 2 (3.64%) and 14 families had only 1 (1.82%) breeding species each. The maximum nest building was recorded in April 276 (33.70%) and minimum in January 31 (3.78%). The highest number of nests were built in plants 370 (45.18%) and among the rest 279 (34.06%) in buildings, 116 (14.16%) in hill slopes, 46 (5.62%) in lampposts and 8 (0.98%) in the ground. The birds were recorded to use 32 species of plants under 20 families, of which 21 (65.63%) were indigenous and 11 (34.37%) were exotic species for breeding purpose only. Mango (Mangifera indica) supported the highest number of bird species for nesting about 59 (15.94%) while the second highest was coconut (Cocos nucifera) 52 (14.05%), and plant species like Bhadi (Garuga pinnata) and Pitraj (Aphanamixis polystachya) was the lowest species of only 1 (0.27%). Among the 370 nests, 295 (79.73%) were recorded in the indigenous plants and the rest 75 (20.27%) were in the exotic species. Habitat degradation and destruction, pollution in and around CUC, planting exotic species, human settlements, collection of litters and firewood, and occasional fires are hampering breeding activities of birds in the CUC. Necessary steps are to be taken to overcome the problems and protect their breeding and feeding habitats, and further study is needed to know detail of their breeding behaviour \u0000Asiat. Soc. Bangladesh, Sci. 45(1): 1-14, June 2019","PeriodicalId":186946,"journal":{"name":"Journal of the Asiatic Society of Bangladesh, Science","volume":"38 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121167025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Sodium Chloride Salinity on Water Relations and Ion Accumulation in Two Mungbean Varieties Differing in Salinity Tolerance","authors":"Mst Shahnaz Sultana, M. A. Halim, F. Hossain, M. A. Karim, M. Hossain","doi":"10.3329/jasbs.v45i1.46569","DOIUrl":"https://doi.org/10.3329/jasbs.v45i1.46569","url":null,"abstract":"Salt tolerance in relation to water status and plant nutrients of two mungbean varieties, BARImung 2 (salinity sensitive) and BUmung 2 (salinity tolerant) was evaluated. The seeds were grown in pots and treated with NaCl levels of 0 (control), 100 and 200 mM. Different parameters related to water relations as well as mineral nutritients were measured. The exudation rate and relative water content were decreased but water saturation deficit was increased by salinity in both the varieties. In BARImung 2 plants, the exudation rate and relative water content were lower but water saturation deficit was higher than those in BUmung 2 at both 100 and 200 mM NaCl levels. Salinity also influenced the accumulation of Na, K, Ca and Mg in leaves, stems and roots of the two said mungbean varieties. Sodium accumulation was inceseased in all the plant-parts of both the varieties in the order of stem > root > leaf but in BUmung 2 the accumulation was lower than that of BARImung 2 except in root. Potassium accumulation deceresed in all parts of both the mungbean varieties but that was lower in BUmung 2 than that of BARImung 2. The contents of Ca and Mg in all the plant-parts increased more in BUmung 2 than those of BARImung 2 with the increase of salinity levels. All these results indicated that high salt tolerance in BUmung 2 was associated with its better water status, more or less uniform mineral nutrient (Ca and Mg) distribution in different plantparts than that in BARImung 2. \u0000Asiat. Soc. Bangladesh, Sci. 45(1): 45-54, June 2019","PeriodicalId":186946,"journal":{"name":"Journal of the Asiatic Society of Bangladesh, Science","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128474308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}