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- 저자 : Md. Sazzad Hossain (검색결과 3 건)
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Hossain Md. Sazzad,Oluwajuwon Tomiwa V.,Ludgen Afentina N.,Hasert David P.,Sitanggang Marisa,Offiah Chinedu 한국산림과학회 2023 Forest Science And Technology Vol.19 No.4
The forests in Central Kalimantan, Indonesia have been heavily impacted by logging, mining, fires, and other degradation activities for over 30 years. To address this, the Indonesian gov- ernment has promoted community-based forest management schemes. One such scheme, called Hutan Kemasyarakatan (HKm), has introduced Sengon (Paraserianthes falcataria) in smallholder plantations in Rungan Barat, Gunung Mas, Central Kalimantan. However, accur- ate estimation of biomass is crucial for carbon sequestration credits, but there are no specific allometric models for estimating Sengon above-ground biomass (AGB) in this area. To create a site-specific AGB allometric model for Sengon, 23 trees were felled to collect fresh biomass data. Various tree variables, such as diameter at breast height: 1.3 m (DBH), total height, mer- chantable height, and stem bole volume were measured for each sample tree. The average wood basic density of Sengon at the study site was also calculated. A total of nine alterna- tive candidate regression equations were fitted and tested to select the best-fit AGB allomet- ric model. Also, to assess the adaptedness of the identified AGB allometric model, comparisons with the models from literature, and comparisons between two interchange- able methodologies (i.e. direct biomass allometric model and biomass expansion factor (BEF)-based biomass estimation) were undertaken. This study has developed a regression function, denoted as Y ¼ 0:08062 �DBH2:36816 , to estimate the AGB of Sengon trees in smallholder plantations in Central Kalimantan, Indonesia. The formulated regression function demonstrated better estimation performance compared to common pantropical and regional AGB allometric models. In terms of the BEF-biomass approach, the AGB estimation derived from Smalian’s volume was relatively accurate, close to the mean AGB obtained by the formulated model in this study. In summary, this study proposes using the developed model, based solely on DBH, to accurately estimate AGB and carbon sequestration potential in Sengon trees. The accurate estimation of AGB using this model has additional advantages, including facilitating carbon credit acquisition and informing long-term management decisions.
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A. F. M. Mahmudul Islam,Md. Farhan Khalik,Nizam Uddin,Md. Sazzad Hossain,Md. Monir Hossain,Md. Mahadi Hasan,S. M. Fahad,Pijus Saha 한국약제학회 2015 Journal of Pharmaceutical Investigation Vol.45 No.2
The aim of this study was to scrutinize thephysicochemical and qualitative microbial examination of 30 different (of various dosage forms) herbal medicinalproducts marketed by pharmaceutical and herbal manufacturersin Bangladesh. The microbial evaluation includedtotal viable aerobic bacteria, Escherichia coli, fungi andStaphylococcus aureus count; physicochemical propertieslike weight variation, hardness, disintegration time, friabilityand density. The IMViC (indole, methyl red, Voges–Proskauer and citrate utilization) tests were frequentlyemployed for identification of E. coli and S. aureus. Totalviable aerobic bacterial counts in the samples analyzed wereranged from 3.8 × 10⁴ to 3.2 × 108 CFU/ml or CFU/g and 36.67 % were within BP standard limit. S. aureus wasdetected in 53.33 % (16) of the samples, ranged from anestimated 3 × 10² to 9.2 × 106 CFU/ml or CFU/g whichwere above the USP standard. E. coli was detected in 40 %(12) of the samples, ranging from 1 × 10² to 4.8 × 10⁴CFU/ml or CFU/g that were above the USP standard. Theranges of the fungi counts were 3.4 × 10³ – 3.1 × 106 CFU/ml or CFU/g and 46.67 %of which were within BP standard. Physicochemical properties of herbal products manufacturedby pharmaceutical manufacturers were found betterthan that of the herbal manufacturers. From the label andpack insert of herbal products, definite release patterninformation weren’t obtained and the majority of herbalproducts showed scattered disintegration time. In order toreduce the potential health related complications, there isnecessity of constant monitoring and control of the standardsof herbal medicine products available in the Bangladeshimarket.
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