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A taxonomic survey of pteridophytic flora of Lalmai Pahar and Mainamati of Cumilla district, Bangladesh 孟加拉国库米拉县 Lalmai Pahar 和 Mainamati 的翼手目植物区系分类调查
Pub Date : 2024-04-08 DOI: 10.3329/dujbs.v33i1.72494
N. Tabassum, Momtaz Begum
This study aims to investigate the pteridophytic flora of the Lalmai Pahar, Mainamati, located at the Cumilla district of Bangladesh. Despite the absence of extensive pteridophyte surveys in this hilly forest, it is known to harbour a diverse range of pteridophyte species. This study presents a survey of the pteridophyte diversity within the specified area, documenting a total of 27 taxa. The voucher specimens have been deposited at the Salar Khan Herbarium, Department of Botany at the University of Dhaka.Dhaka Univ. J. Biol. Sci. 33(1): 1-21, 2024 (January)
本研究旨在调查位于孟加拉国库米拉地区曼纳马蒂(Mainamati)的拉尔迈帕哈(Lalmai Pahar)的翼手目植物区系。尽管没有对这片丘陵森林进行广泛的翼手目植物调查,但众所周知,这里蕴藏着多种多样的翼手目植物物种。本研究对指定区域内的翼手目多样性进行了调查,共记录了 27 个分类群。凭证标本已存放在达卡大学植物学系萨拉尔汗标本馆。33(1):1-21, 2024 (January)
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引用次数: 0
Exopolysaccharide producing bacteria of Sundarban Mangrove Forest soil and their antibiotic sensitivity profile 孙德班红树林土壤外多糖产菌及其抗生素敏感性分析
Pub Date : 2023-07-20 DOI: 10.3329/dujbs.v32i2.67683
Zennathara, S. Afrin, Mohammad Ali, M. Islam, M. Saha
This study focused on the investigation of Exopolysaccharide (EPS) producing bacteria from Sundarbans mangrove forest (SMF) soil, Bangladesh. The heterotrophic bacterial loads in the soil samples varied from 0.44×107 to 4.2×107 cfu/g indicating high bacterial load even under hostile environment. Fifteen EPS producing bacterial isolates were identified provisionally where thirteen isolates belonged to the genus Bacillus including B. badius (n=1, 6.67%), B. subtilis (n=3, 20.0%), B. pumilus (n=3, 20.0%), B. brevis (n=2, 13.33%), B. stearothermophilus (n=2, 13.33%), B. sphaericus (n=1, 6.67%) and B. alcalophilus (n=1, 6.67%). The remaining two isolates were recognized as the genus Micrococcus sp. (n=2, 13.33%). The genus Bacillus was predominant representing 86.67% abundance frequency. The LB medium was proven to be the most suitable medium for the growth of EPS producing bacterial isolates. 16S rDNA sequence analysis was conducted for three EPS producing bacterial isolates and they were identified as Bacillus subtilis, B. strearothermophilus and Micrococcus sp. The antibiogram profile of this study revealed streptomycin as the most effective antibiotic to control the growth of bacteria. The presence of antibiotic resistance bacteria in SMF soil is alarming for human health associated with this marine ecosystem. The multidrug resistance bacteria may come to the soil of SMF through the untreated discharged wastewaters and agricultural runoff from adjacent areas.Dhaka Univ. J. Biol. Sci. 32(2): 243-255, 2023 (July)
本研究对孟加拉国孙德尔本斯红树林(SMF)土壤中产胞外多糖(EPS)细菌进行了研究。土壤样品中的异养细菌负荷从0.44×107到4.2×107 cfu/g不等,表明即使在恶劣环境下细菌负荷也很高。初步鉴定出15株产EPS细菌,其中13株属于芽孢杆菌属,包括坏芽孢杆菌(n=1, 6.67%)、枯草芽孢杆菌(n=3, 20.0%)、矮芽孢杆菌(n=3, 20.0%)、短芽孢杆菌(n=2, 13.33%)、嗜脂热芽孢杆菌(n=2, 13.33%)、球芽孢杆菌(n=1, 6.67%)和嗜酸芽孢杆菌(n=1, 6.67%)。其余2株经鉴定为微球菌属(n=2, 13.33%)。芽孢杆菌属为优势菌属,丰度频率为86.67%。结果表明,LB培养基是EPS产菌分离株生长最适宜的培养基。对3株EPS产菌进行16S rDNA序列分析,鉴定为枯草芽孢杆菌(Bacillus subtilis)、嗜流热杆菌(B. strearotherophilus)和微球菌(Micrococcus sp)。本研究的抗生素谱图显示链霉素是控制细菌生长最有效的抗生素。SMF土壤中抗生素耐药细菌的存在对与该海洋生态系统相关的人类健康构成了威胁。多药耐药细菌可能通过邻近地区未经处理的排放废水和农业径流进入SMF土壤。达卡大学。科学通报,32(2):243- 255,2023 (7)
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引用次数: 0
Relapse of psychiatric patients during Covid- 19 pandemic Covid- 19大流行期间精神病患者的复发
Pub Date : 2023-07-20 DOI: 10.3329/dujbs.v32i2.67674
Liza Akter, Farah Deeba
Relapse is a highly burdensome phenomenon in mental health care as it creates distress not only in the individual but also in the family and society. Therefore, detecting factors that are potential to develop relapse and the management measures for a psychiatric patient after relapse are very much important. The study was carried out to know whether different types of psychiatric patients were experiencing relapse due to the outbreak of the COVID-19 pandemic. A survey with telephonic interviews was conducted with 55 mental health professionals of Bangladesh. A total of 250 psychiatric patients’ information was collected. It was found that 56.40% of them relapsed after outbreak of the COVID-19 and most of them were females and young adult patients. Patients reported of suffering from anxiety disorders, depressive disorders, and obsessive-compulsive disorders before the COVID-19 relapsed more than the other disorders. The most reported causes of their relapse were fear of having COVID-19, feeling frightened and anxious due to uncertainty in the COVID-19 situation, feeling depressed due to social isolation and adjustment problems, and conflicts with family members. Relapsed patients had taken services mostly through telemedicine and tele-counseling rather than face-to-face services. Recommendations to the management of relapse of psychiatric patients in a pandemic based on the results of the study are discussed.Dhaka Univ. J. Biol. Sci. 32(2): 149-157, 2023 (July)
复发是精神卫生保健中一种非常繁重的现象,因为它不仅给个人而且给家庭和社会造成痛苦。因此,发现潜在复发的因素和对精神病患者复发后的管理措施是非常重要的。这项研究是为了了解不同类型的精神病患者是否因新冠肺炎疫情的爆发而复发。对孟加拉国55名心理健康专业人员进行了电话访谈调查。共收集了250例精神病患者的信息。结果发现,新冠肺炎暴发后复发率为56.40%,以女性和青壮年患者居多。在新冠肺炎之前,患者报告的焦虑症、抑郁症、强迫症的复发率高于其他疾病。报告的复发原因最多的是对新冠病毒的恐惧、对新冠病毒形势的不确定性感到恐惧和焦虑、因社会孤立和适应问题而感到沮丧、与家人的矛盾。复发患者大多通过远程医疗和远程咨询接受服务,而不是面对面的服务。根据研究结果,讨论了对大流行中精神病患者复发管理的建议。达卡大学。科学通报32(2):149-157,2023 (7)
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引用次数: 0
Plankton seasonality and its relationship with some physicochemical factors in south-eastern coasts of Bay of Bengal, Bangladesh 孟加拉孟加拉湾东南海岸浮游生物季节性及其与某些理化因子的关系
Pub Date : 2023-07-20 DOI: 10.3329/dujbs.v32i2.67673
P. K. Mozumder, Bipul Chandra Biswas, Md Abdur Rob Mollah
This study was conducted between January and December, 2014 in four sampling stations of the Bay of Bengal, namely Teknaf beach, Inani beach, St. Martin’s Island and Sonadia Island. A total of 39 plankton species were recorded from 4 stations. Among those, 8, 3,2,14 and 2 species belonged to algae, protozoa, rotifera, copepods, and ostracods respectively. Copepoda was the most abundant zooplankton at all stations. The highest monthly density of plankton was 111.2 ind./l at Teknaf beach and the lowest was 5.6 ind./l at Sonadia Island of the Bay of Bengal. Some species such as, Biddulphia sp., Coscinodiscus centralis, copepod nauplii, Canthocalanus pauper, Acrocalanus spp., Clausocalanus spp., Oithona spinirostris were more abundant than other plankton. The plankton population showed positive correlation with physicochemical factors like water temperature and air temperature whereas negatively correlated with pH, DO, CO2, salinity, acidity and alkalinity with a few exceptions.Dhaka Univ. J. Biol. Sci. 32(2): 135-148, 2023 (July)
本研究于2014年1月至12月在孟加拉湾的Teknaf海滩、Inani海滩、St. Martin 's Island和Sonadia Island四个采样站进行。4个监测站共记录浮游生物39种。其中藻类8种,原生动物3种,轮虫2种,桡足类14种,介形虫2种。桡足类浮游动物数量最多。月浮游生物密度最高的是Teknaf海滩,为111.2 ind./l,最低的是孟加拉湾Sonadia岛,为5.6 ind./l。其中,Biddulphia sp.、Coscinodiscus centralis、naupl桡足类、Canthocalanus pauper、Acrocalanus spp.、Clausocalanus spp.、Oithona spinirostris等浮游生物数量最多。浮游生物种群与水温、气温等理化因子呈显著正相关,与pH、DO、CO2、盐度、酸碱度呈显著负相关,但有少数例外。达卡大学。科学通报32(2):135- 148,2023 (7)
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引用次数: 0
Distinctive feature training in Bangla consonants: distinguishing learning and working memory 孟加拉语辅音特征训练:区分学习与工作记忆
Pub Date : 2023-07-20 DOI: 10.3329/dujbs.v32i2.67684
Tanzila Pias, Fariea Bakul, Mst Sonia Islam Nisha, Shahin Ahmed
Like other languages, Bangla has some phonetically distinct letters that make it difficult for young children to learn and pronounce. As a result, they make mistakes in the articulation of those letters. Results from earlier studies suggest that phonemes that are similar in sound become confusing for each other in short-term memory, which can create a barrier for learning and retention in long-term memory. However, any comprehensive study of the distinctive features of the Bangla alphabet has yet to be carried out. The goal of the current study was to determine whether there are any differences between the two independent groups' levels of learning and working memory (the training/experimental group, which received training in phonetic distinctive features, and the non-training/control group, which received no training). Children between seven and eight years of age were selected as participants in the study. The result of this experiment shows a clear connection between distinctive feature training and articulation. Specific training in some alphabet letters in Bangla helps the children in their letter learning and working memory. For children with articulation problems, distinctive feature training can bring about significant developments in terms of the number of errors and sound precision.Dhaka Univ. J. Biol. Sci. 32(2): 257-263, 2023 (July)
像其他语言一样,孟加拉语有一些语音上不同的字母,这使得幼儿很难学习和发音。结果,他们在这些字母的发音上犯了错误。早期的研究结果表明,发音相似的音素在短期记忆中会相互混淆,这可能会对长期记忆的学习和保留造成障碍。然而,对孟加拉字母的独特特征还没有进行任何全面的研究。本研究的目的是确定两个独立组(训练组/实验组接受语音特征训练,非训练组/对照组未接受任何训练)的学习和工作记忆水平是否存在差异。7至8岁的儿童被选为研究的参与者。实验结果表明,特征训练与发音之间存在明显的联系。对一些孟加拉语字母的具体训练有助于孩子们的字母学习和工作记忆。对于有发音问题的儿童,特征训练可以在错误数量和发音精度方面带来显著的发展。达卡大学。科学通报32(2):257-263,2023 (7)
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引用次数: 0
Soil organic carbon stocks in the blue carbon habitats of Bangladesh 孟加拉国蓝碳栖息地的土壤有机碳储量
Pub Date : 2023-07-20 DOI: 10.3329/dujbs.v32i2.67677
Md. Jashim Uddin, Arafat Rahman, A. M. E. Kibria, Ahmz Ali
A study was conducted in the coastal blue carbon habitats of Bangladesh regarding soil organic carbon (SOC) stocks. Fifty soil samples covering 10 soil profiles at five different depths level up to 1 m was considered to complete the above research. In the salt marsh sites, SOC ranged from 13.1 to 45.7 g/kg with a mean value of 27.5 g/kg. In the mangrove sites, SOC varied from 14.1 to 46.3 g/kg with a mean value 26.4 g/kg. In Mangrove ecosystem soils, clay contents showed a very strong positive correlation with SOC (r = 0.901 and p < 0.01) whereas silt showed a significant positive correlation with the SOC (r = 0.691 and p< 0.05) in the salt marsh sites. As the mangrove ecosystem holds more clay than the salt marsh ecosystem so it may be said that mangrove soils are more potential for carbon storage than salt marsh soils. The study revealed that both of these ecosystems hold more carbon than the threshold level (20.0 g/kg). It is suggested to protect and regenerate the blue carbon habitats in the coastal ecosystem considering the present findings to tackle climate change and other sudden disasters.Dhaka Univ. J. Biol. Sci. 32(2): 179-188, 2023 (July)
对孟加拉国沿海蓝碳栖息地土壤有机碳(SOC)储量进行了研究。为了完成上述研究,我们考虑了50个土壤样本,覆盖了5个不同深度的10个土壤剖面,最高可达1米。盐沼样地土壤有机碳含量在13.1 ~ 45.7 g/kg之间,平均值为27.5 g/kg。红树林样地土壤有机碳含量变化范围为14.1 ~ 46.3 g/kg,平均值为26.4 g/kg。在红树林生态系统土壤中,粘土含量与有机碳呈极显著正相关(r = 0.901, p< 0.01),淤泥含量与有机碳呈极显著正相关(r = 0.691, p< 0.05)。由于红树林生态系统比盐沼生态系统含有更多的粘土,因此可以说红树林土壤比盐沼土壤具有更大的碳储存潜力。研究表明,这两个生态系统的碳含量都超过了阈值水平(20.0 g/kg)。建议在此基础上,对沿海生态系统中的蓝碳生境进行保护和再生,以应对气候变化和其他突发性灾害。达卡大学。科学通报32(2):179- 188,2023 (7)
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引用次数: 0
Self-compassion and interpersonal reactivity among Bangladeshi University students 孟加拉大学生自我同情与人际反应
Pub Date : 2023-07-20 DOI: 10.3329/dujbs.v32i2.67686
Masuda Afrin, Roufun Naher, M. R. Rabby
Abstract not availableDhaka Univ. J. Biol. Sci. 32(2): 271-276, 2023 (July)
哈达大学生物学报。科学学报,32(2):271-276,2023 (7)
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引用次数: 0
Mental health and perceived stress in relation to personality traits among Bangladeshi University students 孟加拉国大学生的心理健康和感知压力与人格特征的关系
Pub Date : 2023-07-20 DOI: 10.3329/dujbs.v32i2.67682
Joyonto Dasgupto, Zinnatul Borak, M. R. Rabby
While attending university is a conceivably stressful situation, there is growing evidence that a sizable proportion of students suffer from mental health issues. The present study aims to observe the mental health issues, perceived stress, and personality traits among Bangladeshi university students well as to identify whether personality traits are associated with mental health status or perceived stress among university students. 300 conveniently sampled university students participated in a web-based cross-sectional survey that collected demographic information as well as results from the Bangla GHQ-12, Bangla PSS-10, and Bangla BFPT-44 scales. The average score of mental health-related issues and perceived stress was 15.91 and 20.20, respectively. Neuroticism was significantly associated with mental health issues (B = .473, AR2 = .423, 95% CI: .450 to .690) as well as with stress (B = .401, AR2 = .222, 95% CI: .211 to .382). Agreeableness, extraversion, and conscientiousness were also found to be significantly associated with mental health issues and stress (p<.001). Since neuroticism is associated with a higher risk of mental health issues and higher levels of perceived stress in students, and extraversion, conscientiousness, and agreeableness are associated with a lower risk, this information can be used to design preventative and educational programs that focus on these specific personality traits.Dhaka Univ. J. Biol. Sci. 32(2): 233-241, 2023 (July)
虽然上大学是一个压力很大的环境,但越来越多的证据表明,相当一部分学生患有心理健康问题。本研究旨在观察孟加拉大学生的心理健康问题、感知压力和人格特质,以及人格特质是否与大学生的心理健康状况或感知压力相关。300名方便抽样的大学生参加了一项基于网络的横断面调查,该调查收集了人口统计信息以及孟加拉国GHQ-12、孟加拉国PSS-10和孟加拉国BFPT-44量表的结果。心理健康问题和感知压力的平均得分分别为15.91分和20.20分。神经质与心理健康问题(B = .473, AR2 = .423, 95% CI: .450至.690)以及压力(B = .401, AR2 = .222, 95% CI: .211至.382)显著相关。宜人性、外向性和尽责性也被发现与心理健康问题和压力显著相关(p< 0.001)。由于神经质与较高的心理健康问题风险和较高的学生感知压力水平相关,而外向性,尽责性和亲和性与较低的风险相关,这些信息可以用于设计针对这些特定人格特征的预防和教育计划。达卡大学。科学通报32(2):233-241,2023 (7)
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引用次数: 0
Psychological well-being and coping strategies of the forcefully displaced Rohingya refugees 被迫流离失所的罗兴亚难民的心理健康和应对策略
Pub Date : 2023-07-20 DOI: 10.3329/dujbs.v32i2.67675
Mehrin Mostafa Mumu, M. R. Rabby, Parveen Huque
Despite the immensity and severity of the Rohingya refugee crisis, information on their psychological well-being and coping mechanisms are limited. This work aims to synthesize research on the mental health and coping strategies of Rohingya refugees. Forty-four purposely sampled refugees completed a cross-sectional survey in the form of a structured interview, providing demographic information as well as responses on the Bangla Psychological well-being measure and the Bangla coping scale. The mean score for respondents' psychological well-being was 246.9 (SD = 25.39), while the mean score for adaptive coping was 35.93 (SD = 4.64) and the mean score for nonadaptive coping was 26.29 (SD = 3.76). Results showed a statistically significant difference (t= -2.185, p<.05) in adaptive coping scores between single/unmarried and married participants. Awareness of past traumatic experiences needs to be harmonized with consideration of existing stressors and factors pertaining to future concerns. It is imperative to construct mental health interventions that mobilize the individual and community capabilities of Rohingya refugees.Dhaka Univ. J. Biol. Sci. 32(2): 159-166, 2023 (July)
尽管罗兴亚难民危机规模巨大且严重,但有关他们心理健康和应对机制的信息有限。这项工作旨在综合研究罗兴亚难民的心理健康和应对策略。44名有目的地抽样的难民以结构化访谈的形式完成了一项横断面调查,提供了人口统计信息以及对孟加拉心理健康测量和孟加拉应对量表的回应。被调查者心理幸福感平均得分为246.9分(SD = 25.39),适应性应对平均得分为35.93分(SD = 4.64),非适应性应对平均得分为26.29分(SD = 3.76)。结果显示,单身/未婚与已婚受试者的适应应对得分差异有统计学意义(t= -2.185, p< 0.05)。对过去创伤经历的认识需要与对现有压力源和与未来关切有关的因素的考虑相协调。必须制定精神卫生干预措施,调动罗兴亚难民的个人和社区能力。达卡大学。科学学报,32(2):159- 166,2023 (July)
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引用次数: 0
Determination of antibiotic resistance pattern of bacteria isolated from livestock feces 家畜粪便中分离细菌的抗生素耐药性模式测定
Pub Date : 2023-07-20 DOI: 10.3329/dujbs.v32i2.67685
Sahri Rahman, A. Noman, M. Islam, S. Ahsan
In Bangladesh, antibiotics are given to animals in order to improve their health and productivity. This can, however, lead to development of antibiotic resistance in the bacteria and subsequent transfer of the resistance property to human. Twenty one bacteria were isolated from five livestock fecal samples collected from Chankharpul, Sadarghat and Savar. Seven of the most commonly used antibiotics (Streptomycin, Chloramphenicol, Ciprofloxacin, Azithromycin, Oxytetracycline, Co-trimoxazole and Erythromycin) in animal feed in Bangladesh were tested. All (100%) the isolates were sensitive to Chloramphenicol and Tetracycline. Highest resistance was shown to Oxacillin (52.38%) followed by Erythromycin (33.33%) and Streptomycin (33.33%), Azithromycin (23.81%), Oxytetracycline (19.05%) and Ciprofloxacin (19.05%) and finally Co-trimomoxazole (14.29%). Four (19%, n = 21) of the bacteria were resistant to three or more antibiotics and were hence multidrug resistant. All isolates from Chankharpul were resistant to Streptomycin, Erythromycin and Oxacillin whereas all were sensitive to Chloramphenicol and Tetracycline. In case of Sadarghat, highest resistance (67%) was shown to Azithromycin and least (0 %) to Oxytetracycline, Streptomycin and Tetracycline. Isolates from Savar showed highest resistance (87.5%) to Oxacillin and all were sensitive to Chloramphenicol. Based on the findings of this study, we recommend the use of Chloramphenicol and Tetracycline for the treatment of livestock. High resistance to Streptomycin, Erythromycin, Oxacillin and Azithromycin suggests that the use of these antibiotics must be restricted in animal feed.Dhaka Univ. J. Biol. Sci. 32(2): 265-269, 2023 (July)
在孟加拉国,给动物注射抗生素是为了改善它们的健康和生产力。然而,这可能导致细菌产生抗生素耐药性,并随后将耐药性转移给人类。从Chankharpul、Sadarghat和Savar采集的5份牲畜粪便样本中分离出21种细菌。对孟加拉国动物饲料中最常用的七种抗生素(链霉素、氯霉素、环丙沙星、阿奇霉素、土霉素、复方新诺明和红霉素)进行了测试。所有菌株(100%)对氯霉素和四环素敏感。耐药最高的是奥西林(52.38%)、红霉素(33.33%)、链霉素(33.33%)、阿奇霉素(23.81%)、土霉素(19.05%)、环丙沙星(19.05%),最后是复方三甲恶唑(14.29%)。4个(19%,n = 21)细菌对3种或3种以上抗生素耐药,因此具有多重耐药。所有菌株均对链霉素、红霉素和奥西林耐药,对氯霉素和四环素敏感。在Sadarghat病例中,对阿奇霉素的耐药性最高(67%),对土霉素、链霉素和四环素的耐药性最低(0%)。沙瓦尔分离株对奥西林的耐药性最高(87.5%),对氯霉素均敏感。根据这项研究的结果,我们建议使用氯霉素和四环素来治疗牲畜。对链霉素、红霉素、奥西林和阿奇霉素的高耐药性表明,必须限制在动物饲料中使用这些抗生素。达卡大学。科学通报,32(2):265- 269,2023 (7)
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引用次数: 0
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Dhaka University Journal of Biological Sciences
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