Status, Distribution and Diversity of Invasive Forest Undergrowth Species in the Tropics: a Study from Northeastern Bangladesh

Md. Habibur Rahman,Mohammed Abu Sayed Arfin Khan,Most. Jannatul Fardusi,Bishwajit Roy 강원대학교 산림과학연구소 2010 Journal of Forest Science Vol.26 No.3

This paper analyzes data on the composition, status, diversity, and distribution pattern of invasive forest undergrowth species in a protected area (Khadimnagar National Park) of Northeastern Bangladesh. Assessment was done by means of stratified random sampling to diversify the invasive forest undergrowth species. For vegetation survey, 45 plots were taken randomly in (2 m × 2 m) circular plot from three topographical regions namely top of the hill, middle slope and plain land (15 plots from each region) and a total of 715 individuals, 22 invasive species belonging to 17 families were recorded from the study site. Among invasive species, shrubs constitute 10 species, herbs 9 species, and vines 3 species respectively. Mass number of invasive undergrowth species was grows in plain land (45.45%) followed by middle slope (31.82%). Based on the survey, invasive undergrowth plants of study areas were also categorized into three degrees of invasiveness e.g., highly invasive, moderately invasive and potentially invasive. Herbs, shrubs, and vines constitute the highest density at Chromolaema odorata (Linn.) King. (1.09), relative density at Chromolaema odorata (Linn.) King. 6.85%; highest and lowest frequency was calculated at Cassia alata L. (64.44%) and Diplazium esculentum (24.44%); for relative frequency the highest was Cassia alata L., which occupies 6.64%. Determination of the abundance of the different species revealed that Cassia alata L., constitutes (3.36) followed by Pteris cretica Wilsonii (3.14) of the area. The presence of invasive undergrowth species always reduced the number of associated species. Therefore, an extensive in-depth long-term investigation, proper policy formulation and management interventions and further study and continuous monitoring on their impacts need to be triggered targeting the control of the invasive undergrowth species of this protected area. In this aspect, national and international organization could help to conserve its biodiversity.

Ecotourism and Protected Area Conservation in Bangladesh: a Case Study on Understanding the Visitors Views on Prospects and Development

Rahman, Md. Habibur,Roy, Bishwajit,Anik, Sawon Istiak,Fardusi, Most. Jannatul Institute of Forest Science 2013 Journal of Forest Science Vol.29 No.1

Protected area based ecotourism is now the most interesting topic to the nature lover and policy maker throughout the world because of its linkage with economic benefits, protected area management and biodiversity conservation. Based on this premise our study explores the visitors' perception on the recreational potential of Kaptai National park and its potentiality in ecotourism development in Bangladesh. The field survey was carried out both in holidays and non-holidays of the week from the late winter season in 2009 to the spring season in 2010. A total of 118 visitors were interviewed with the help of a semi-structured questionnaire. Study findings revealed that about 62% male constitute the visitors group with the maximum number of visitors in the age of between 15-25 years (35.59%). The tourists were very much attracted by boat riding (93.22%) followed by scenic beauty of Rampahar-Sitapahar (85.59%). A major portion of about 57.14% tourists wished to visit the park within a year because they got a lot of pleasure from Natural and green environment (86.44%) followed by boating on Kaptai Lake (85.59%). Most of the visitors (36%) were happy about existing facilities but defined some problems such as tour guiding facility, food and drinking water supply, etc. About 71% and 66% respondents perceived that Kaptai National Park made them to be concerned and protective of nature and supports and sustains local ecosystem respectively and 43% respondents agreed that Kaptai National Park ensures the social equity and involve local people in ecotourism which are the most important elements of sustainable ecotourism. The present study results also predict that the park might be a good recreational area for enjoying with family members and group of friends through proper management and promoting the relationships among tourism, local people and biodiversity conservation.

Present Status of Rooftop Gardening in Sylhet City Corporation of Bangladesh: an Assessment Based on Ecological and Economic Perspectives

Rahman, Md. Habibur,Rahman, Mizanur,Kamal, Md. Mostafa,Uddin, Md. Jasim,Fardusi, Most. Jannatul,Roy, Bishwajit Institute of Forest Science 2013 Journal of Forest Science Vol.29 No.1

Present study analyzes the rooftop gardening status, floristic composition and cost and return of the rooftop garden in Sylhet City Corporation of northeastern Bangladesh. Data was collected from 450 rooftop gardeners randomly during July-September 2010. Study reveal that rooftop gardening is generally for mental satisfaction (95.3%) followed by leisure time activity (87.8%) in the study area and almost all the family members of gardeners' were involved; while collection of planting materials, sites preparation and marketing of products were reported to be carried out by males only (male 71.33%). Middle income classes were most interested in rooftop gardening (43.78%). The survey recorded 53 plant species (35 families) of which Cucurbitaceae family represented highest eight species. Shrubs (28%) were highest followed by herbs (26%) among agri-crops (36%) and flower species (30%). About 89% of the rooftop gardeners procured planting materials from nursery, market, fair, neighbor, relative and friends and they mostly prefer to use seedlings (48%) for roof gardening followed by direct seed sowing (21%). Gardeners sell products sporadically in different local markets, directly or through intermediaries, with no uniform pricing for system. Rooftop gardening improves the food security and meet nutritional deficiency to the gardeners. Survey revealed that generally very few people consider rooftop gardening commercially to get profit and from the cost-return analysis this gardening system can be economically viable if proper and scientifically managed. The study conclude that active government and NGOs could play vital role to increasing this activities by providing training and motivate people with technical aspects of rooftop gardening.

Convolutional Neural Network-Based UAV Classification Using RF Fingerprints

Md Habibur Rahman,Mohammad Abrar Shakil Sejan,Jung-In Baik,Md Abdul Aziz,Rana Tabassum,Hyoung-Kyu Song 한국통신학회 2024 한국통신학회 학술대회논문집 Vol.2024 No.1

Hypothalamic inflammation and malfunctioning glia in the pathophysiology of obesity and diabetes: Translational significance

Rahman, Md Habibur,Bhusal, Anup,Lee, Won-Ha,Lee, In-Kyu,Suk, Kyoungho Elsevier 2018 Biochemical pharmacology Vol.153 No.-

<P><B>Abstract</B></P> <P>Preclinical studies have suggested that chronic inflammation in the brain might be associated with multiple metabolic disorders, including obesity and diabetes. In particular, hypothalamic inflammation interferes with the endocrine system and modulates nutritional homeostasis, leading to metabolic alterations and consequent pathologies. With regard to the mechanisms underlying molecular and cellular pathogenesis, neurons, non-neuronal cells, and the crosstalk between them have gained particular attention. Specifically, malfunctioning glia have recently been implicated as an important component of pathological hypothalamic inflammation. Hypothalamic inflammation modulates food intake, energy expenditure, insulin secretion, hepatic glucose production, and glucose and fatty acid metabolism. Moreover, growing evidence suggests that hypothalamic inflammation is intrinsically associated with the pathogenesis of obesity, diabetes, and their dysfunctional consequences. However, the translational significance of hypothalamic inflammation has not yet been fully explored. In this review, we cover recent advances suggesting that hypothalamic inflammation and glia play a central role in the ontology of obesity, diabetes, and their complications. Finally, we explore the possibilities and challenges of targeting hypothalamic inflammation as a potential therapeutic strategy.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Safety Evaluation of Drinking Mineral Supplement Hypochlorous Acid Water on Helicobacter pylori-Infected C57BL/6 Mouse Model

Md. Habibur Rahman,Johny Bajgai,Ailyn Fadriquela,Subham Sharma,Trinh Thi Thuy,Seong-Hoon Goh,Cheol-Su Kim,Kyu-Jae Lee 한국물학회 2020 한국물학회지 Vol.8 No.1

Hypochlorous acid water can promote pruritus as an adverse effect under certain conditions, which should be taken into account to ensure safety. In recent days, Mineral Supplement Hypochlorous Acid Water (MS-HOCl) has received massive attention in research as a new-concept cleansing agent due to its high sterilizing properties, easy accessibility, and safety aspects. This present study was conducted to evaluate the drinking effects of MS-HOCl treatment of the Helicobacter pylori (H. pylori )-infected C57BL/6 mouse model to verify the safety effects. The experimental mice were divided into 3 groups: NC (Purified water + no infection), PW (Purified water + H. pylori infection), and MS-HOCL (MS-HOCl + H. pylori infection). Water was supplied through water bottle for mouse for 4 weeks, and changed once a day. We measured the bodyweight, and total WBC and its differential counts such as lymphocytes, monocytes, neutrophil, eosinophil and basophil. Besides that, we also tested biochemical markers such as reactive oxygen species (ROS), nitric oxide (NO), glutathione peroxides (GPx), and calcium activity in both serum and stomach lysate samples. Our results showed that daily oral administration of MS-HOCl water for 4 wk did not show any abnormal findings about hematological and biochemical parameters such as ROS, NO, GPx, and calcium activity in both serum and stomach lysate. There were no significant differences in bodyweight between the three groups. Overall, our results showed no negative effects of drinking MS-HOCl in the H. pylori -infected C57BL/6 mice model. However, more controlled studies are needed to determine the safety of drinking MS-HOCl.

Detection of OCT image Parameters Based on Deep Learning algorithm

Md Habibur Rahman(하비부르 라만),Hang Chan Jo(조항찬),Dong Jin Lee(이동진),Dae Yu Kim(김대유) 대한전자공학회 2021 대한전자공학회 학술대회 Vol.2021 No.6

In this article, we present a computerized detection of optical coherence tomography (OCT) image parameters using a deep learning method. To detect the parameters, Bruch’s membrane opening (BMO) and laminar cribrosa (LC) in OCT image, proposed system work with a convolutional neural network (CNN) algorithm. Herein, we designed detection method using YOLOv3 algorithm where darknet53 CNN used as a backbone network. We used OCT medical images for testing the detection performance. The excremental result for detection performance show that, 99.92% and 99.18% average detection precision of parameters BMO and LC, respectively on the testing image.

Characteristics and Anti-bacterial Effects of Mineral Supplement-Hypochlorous Acid Water on Human Pathogenic Bacteria

Md. Habibur Rahman,Johny Bajgai,Ailyn Fadriquela,Ailyn Fadriquela,Kyu-Jae Lee 한국물학회 2019 한국물학회지 Vol.7 No.1

Hypochlorous acid (HOCl) is a powerful oxidant and a bactericidal agent generally produced by electrolysis, which is much more effective and safer than NaOCl. Recently mineral supplement-treated HOCL (MS-HOCl) water has received attention as a new-concept detergent due to high sterilization power, easy accessibility and safety. In this study we time-dependently investigated the physiochemical properties of MS-HOCl water depending on the kind of diluting agents (tap water, low concentration mineral water and high concentration mineral water), and confirmed anti-bacterial effect of MS-HOCl water according to the ACC level compared to electrolyzed acidic water. Weak acid electrolyzed water (EW-HOCl) was used as a positive control. We evaluated the pH, oxidation reduction potential (ORP), available chlorine concentration (ACC) and total dissolved solid particles (TDS) level to detect physiochemical properties of various kind of MS-HOCl waters. To investigate the bactericidal effects of these experimental waters, 5 different strains of aerobic and anaerobic human pathogenic bacteria (Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Streptococcus mutans and Helicobacter pylori) were used. Three MS-HOCl waters according to ACC levels were prepared through 2-fold serial dilution, and compared with tap water, 70% ethyl alcohol and EW-HOCl. In results, MS-HOCl water had similar physiochemical properties compared to EW-HOCl water. Moreover, MS-HOCl treatment showed excellent bactericidal effect against all five human pathogenic bacterial strains compared to TW and 70% alcohol, and showed similar anti-baterial effect with EW-HOCl. Collectively, our study indicates that MS-HOCl water could be used as a efficient disinfectant alternative due to cost-effectiveness and easy accessibility in hospital settings, food process and poultry industries. However, further studies are required for its safety use.

Investigation of Different Herbicides on Weed Infestation and Yield Performance of Transplant Binadhan-14 (Oryza sativa L.) in Bangladesh

Md. Shahidul Islam,Md. Monjurul Islam,Md. Habibur Rahman,Sakina Khanam,Md. Shahidul Haque Bir,Le Thi Hien,Kee Woong Park 한국잡초학회·한국잔디학회 2020 Weed & Turfgrass Science Vol.9 No.3

This study was carried out at the agronomy farm of Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, Bangladesh, between November 2015 and May 2016, to investigate the weed control on rice growth and yield performance of transplant Binadhan-14 (boro rice). Six selected herbicides (H₁: bensulfuron methyl 4% + acetachlor 14% 18 wettable powder [WP] 500 g·ha<SUP>-1</SUP>, H₂: pyrazosulfuron-ethyl 10 WP 125 g·ha<SUP>-1</SUP>, H₃: metsulfuron-methyl 20 water dispersible granule [WDG] 50 g·ha<SUP>-1</SUP>, H₄: pretilachlor 500 emulsifiable concentrate [EC] 1 L·ha<SUP>-1</SUP>, H5: 2, 4 D amine 480 soluble liquid [SL] 1.8 L·ha<SUP>-1</SUP>, H6: butachlor 5 granule [G] 25 kg·ha<SUP>-1</SUP>) were tested along with two hand weedings. Weed density, fresh and dry weight of weeds were taken from eight weed species (Echinochloa colonum, Paspalums crobiculatum, Monochoria vaginalis, Leersia hexandra, Scirpus mucronatus, Digitaria sanguinalis, Cyperus rotundus and Eclipta alba Hassk) belonging to five families were found to grow in the experimental plots. Among the weed control treatments highest grain yield (5.00 T·ha<SUP>-1</SUP>) was obtained with the treatment pretilachlor 500 EC 1 L·ha<SUP>-1</SUP> followed by two hand weedings (4.97 T·ha<SUP>-1</SUP>). It was observed that yield was increased due to application of herbicide contributed mainly from increasing the yield contributing characteristics of rice like, number of total tillers and effective tillers per plant, filled grains per panicle and 1000-seed weight (g). Maximum benefit- cost ratio with pretilachlor 500 EC 1 L·ha<SUP>-1</SUP> suggested that this herbicidal treatment can be used for effective in controlling weeds as an alternative when labor was crisis in producing for better yield of transplant Binadhan-14 (Oryza sativa) rice cultivar.

Present Status of Rooftop Gardening in Sylhet City Corporation of Bangladesh: an Assessment Based on Ecological and Economic Perspectives

Md. Habibur Rahman,Most. Jannatul Fardusi,Mizanur Rahman,Md. Mostafa Kamal,Md. Jasim Uddin,Bishwajit Roy 강원대학교 산림과학연구소 2013 Journal of Forest Science Vol.29 No.1

Present study analyzes the rooftop gardening status, floristic composition and cost and return of the rooftop garden in Sylhet City Corporation of northeastern Bangladesh. Data was collected from 450 rooftop gardeners randomly during July-September 2010. Study reveal that rooftop gardening is generally for mental satisfaction (95.3%) followed by leisure time activity (87.8%) in the study area and almost all the family members of gardeners’ were involved; while collection of planting materials, sites preparation and marketing of products were reported to be carried out by males only (male 71.33%). Middle income classes were most interested in rooftop gardening (43.78%). The survey recorded 53 plant species (35 families) of which Cucurbitaceae family represented highest eight species. Shrubs (28%) were highest followed by herbs (26%) among agri-crops (36%) and flower species (30%). About 89% of the rooftop gardeners procured planting materials from nursery, market, fair, neighbor, relative and friends and they mostly prefer to use seedlings (48%) for roof gardening followed by direct seed sowing (21%). Gardeners sell products sporadically in different local markets, directly or through intermediaries, with no uniform pricing for system. Rooftop gardening improves the food security and meet nutritional deficiency to the gardeners. Survey revealed that generally very few people consider rooftop gardening commercially to get profit and from the cost-return analysis this gardening system can be economically viable if proper and scientifically managed. The study conclude that active government and NGOs could play vital role to increasing this activities by providing training and motivate people with technical aspects of rooftop gardening.