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In Vitro Propagation of Three Strawberry Cultivars through Runner Tips Culture

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American Journal of Plant Sciences 2023年第11期14卷 1296-1304页

作者： Sussmita Karmaker md. Mukhtar Hossain md. aminul Hoque md. Abdul Kaium md. al amin md. Saidul Islam Department of Agronomy and Agricultural Extension Faculty of Agriculture Rajshahi University Rajshahi Bangladesh Department of Crop Science and Technology Faculty of Agriculture Rajshahi University Rajshahi Bangladesh

At the Genetics and Plant Breeding Laboratory of the Department of Agronomy and Agricultural Extension, University of Rajshahi, Bangladesh, strawberry in vitro propagation was done. Five Benzylaminopurine (BAP) concentrations were utilized for shoot induction—0.0 mg/L (Control), 0.5 mg/L, 1.0 mg/L, 1.5 mg/L, and 2.0 mg/L and five Indole Buteric Acid (IBA) concentrations—0.0 mg/L(Control), 0.5 mg/L, 1.0 mg/L, 1.5 mg/L, and 2.0 mg/l—were used for the induction of the root. The highest mean amount of shoots (eight) and length of the shoot (3.40 cm) were observed at a concentration of BAP of 0.5 mg/L. Festival also had the highest mean amount of leaves (6) when we used the identical concentration, while RABI-3 and Camarosa did the least well. The IBA of 0.5 mg/L concentration of rooting performed the best across all metrics tested among the five concentrations. The longest (3.3 cm) roots and most roots (7) were likewise obtained from this concentration in Festival. However, RABI-3 and Camarosa performed worse than Festival in the same concentration. Half-strength MS media without IBA concentration showed no response regarding root induction for each of the three cultivars.

关键词： Strawberry Proliferation Propagation Shoot Induction Root Induction

Evaluation of Genetic Divergence in Various Potato Genotypes Grown in Bangladesh through Different Traits Assessment

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American Journal of Plant Sciences 2023年第11期14卷 1235-1247页

作者： md. Mukhtar Hossain md. Abdul Kaium md. al amin Tabaraka Binte ali Nusrat Jahan md.Nasim Uddin Department of Crop Science and Technology Faculty of Agriculture Rajshahi University Rajshahi Bangladesh

The goal of the study was to quantify the genetic diversity of different potato varieties. Five groups were named to classify the 25 genres of potatoes as: Cluster I (Lalpakri, Diamond), Cluster II (Hagrai, Green Mountain, G.M.O., Elvera), Cluster III (Atlantic, Shepody, Raja, Fundy, Multa, Granulla, Shibilati, Japanese Red), Cluster IV (Atlas, Brondy, Yucon Gold, Monona, Petrones, Cheroki), and Cluster V (Calwhite, Prelude, allblue, Russet, Burbank, TPS-67). The highest and lowest genotypes are found in Clusters III and I, respectively. The two groups’ maximum inter-cluster distance (the cluster’s distance between them) demonstrates the enormous diversity between Clusters II & III. Cluster III had the greatest intra-cluster distance (distance within a set), whereas Cluster V had the smallest. In most cases, the distance between gaps was more significant than the distance within the holes, showing greater genetic diversity between different groups’ genotypes. The highest, second highest, and third highest eigenvalues, accompanying the positive canonical values for Vectors I and II of three characteristics: average tuber weight in each plant, the tubers number in each plant, and the eyes number in each tuber, showed the most outstanding contribution to the complete difference between genotypes. Of the nine features, the smaller leaves number in each plant, the shorter plant height, the more minor genotypes, the fewer eyes per tube generated from Cluster I, the maximum height of the plants, the high-quality tubers in each plant, the tubers number in each plant, the fresh weight in each plant, and the leaf number in each plant from Cluster II could be chosen in the role of parents in this program for hybridization. Given the size of the genetic distance, the various characteristics that contribute to the overall difference, and the average population size, Hagrai, Green Mountain, O.M.G., Elvera Cluster II and Cluster I, Lalpakri, and Diamond genotypes can be regarded a

关键词： Genetic Divergence Potato Genotypes Different Traits Cluster Analysis Principal Component Analysis

Nutritional, Textural, Sensory Properties and Storage Stability Evaluation of Newly Formulated Strawberry Bar

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Food and Nutrition Sciences 2023年第4期14卷 287-299页

作者： Nargis Akter md. Sajib al Reza md. Esrafil md. al amin Sonyia Akter Neaz Morshed Reza md. Nazmul Huda Nasim Pratima Roy Dina Department of Food Technology and Nutritional Science Faculty of Life Science Mawlana Bhashani Science and Technology University Santosh Bangladesh Department of Biological Sciences Graduate School of Science Tokyo Metropolitan University Hachioji Japan Department of Chemistry and Biochemistry The University of Texas at Arlington Arlington USA

An analytical study was conducted to develop a strawberry bar and analysis of the nutritional quality and storage stability of a newly formulated strawberry bar. In proximate analysis moisture, ash, pH, acidity, vitamin C, total phenolic content, and antioxidant of strawberry pulp were found 82%, 0.5%, 2.57, 1.38%, 49 mg/100g, 0.33%, 75.17% whereas, in the strawberry bar, it was found 18%, 0.71%, 2.10, 1.10%, 22 mg/100g, 0.14%, 56.13% respectively. For textural properties analysis, the textural profile of the strawberry bar such as hardness, factorability, viscosity, cohesiveness, adhesiveness, springiness, gumminess, chewiness, probe diameter, threshold, filtering range of strawberry bar was found 5.538 × 104 N/m, 0.000 N/m2, 1.687 × 104 N/m2, 0.6636, 2.908 × 103 J/m3, 0.8664, 3.675 × 104 N/m2, 3.184 × 104 N/m2, 20.000 mm, 5 N, 0.4 N respectively whereas the maximum level was 17.4 N at 29.628 seconds and the minimum level was -5.3 N at 30.166 seconds. The sensory evaluation of the strawberry bar was conducted based on nine-point hedonic scales. The sensory evaluation results indicated that the appearance of the strawberry bar was liked very much and the taste, texture, color, aroma, and overall acceptability of the strawberry bar were liked moderately by panelists. In microbiological analysis, the Total Viable Count (TVC) and Total Coliform Count (TCC) of the strawberry bar were found safe levels for up to third days. But on the sixth day, the TCC of the strawberry bar was not found and the TVC of the strawberry bar was found 17 × 104 cfu/g respectively which is higher than the permitted value (Gulf Standard: 105 cfu/g). From the microbial point of view, the newly formulated strawberry bar was safe to consume for up to 3 days but not for 6 days.

关键词： Strawberry Pulp Strawberry Bar Antioxidant Sensory Evaluation Texture Gallic Acid

Consumer Acceptance and Physicochemical Properties of Developed Carambola (Averrhoa carambola) Candy

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World Journal of Engineering and Technology 2022年第2期10卷 458-471页

作者： Most. Jesmin Akhter md. Mojaffor Hosain md. Abdul Halim Mehar Prabin Shanaz Parvin Ayesha Siddika Fatehatun Noor md. al-amin Department of Food Processing and Preservation Faculty of Engineering Hajee Mohammad Danesh Science and Technology Uni-versity Dinajpur Bangladesh Department of Food Science and Nutrition Faculty of Engineering Hajee Mohammad Danesh Science and Technology University Dinajpur Bangladesh

The acceptability and physicochemical qualities of carambola candy were evaluated in order to increase fruit consumption. The goal of this investigation was to see whether there were any techniques to preserve carambola in the form of candy. Sugar in various forms (white sugar, corn syrup, icing sugar, and molasses) was employed in candy making process in this study. Moisture, protein, fat, ash, vitamin C, total sugar content, organoleptic quality and microbial status of the prepared candy were analyzed. Protein, fat, vit-C, and total sugar content of carrambola candy were found to be higher with white sugar solution but moisture and ash content was found to be higher with molasses. On the microbiological analysis, total fungal growth was tested visually at 0 to 90 days and compared with refrigeration and room temperature. Fungal growth was found at 90 days at room temperature for all types of carambola candy. Sensory attributes revealed that sample 2 (corn syrup-based candy) was most delicious and appreciated among other samples. The best characteristic of carambola candy was found with white sugar solution, with sufficient nutrient and lowest fungal growth than candy prepared with corn syrup, icing sugar solution and molasses.

关键词： Carambola Candy Proximate Composition Organoleptic Properties Shelf-Life Stability

Quality Study of Rice Husk Ash (RHA) Brick Using Neutron Radiography Technique

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Journal of Building Construction and Planning Research 2015年第3期3卷 127-135页

作者： md. Khurshed alam md. Moniruz Zaman md. al amin Scientific Information Division Bangladesh Atomic Energy Commission Dhaka Bangladesh Institute of Glass and Ceramic Research and Testing (IGCRT) Bangladesh Council of Scientific and Industrial Research (BCSIR) Dhaka Bangladesh Department of Physic Jahangirnagar University Dhaka Bangladesh

A powerful non-destructive testing (NDT) technique is adopted to study the quality of RHA brick-1 and RHA brick-2. In that case, rice husk ash has been utilized for the preparation of bricks in full replacement of clay. In these studies, homogeneity of elemental distribution, water absorption and size and shape of the pores have been observed. From the studies, it was observed that elemental distribution is very good at various level, large number of porosity is presented with little bit size, initial rate of absorption (IRA) due to first five minutes immersion of water is higher compared to other immersion time (>5 minute), incremental water intrusion area increases very slowly with the increasing immersion time and the water absorption for RHA brick-2 becomes saturated very early than that of the RHA brick-1.

关键词： Neutron Radiography RHA IRA and Water Absorption Behavior

Structural and Mechanical Properties of alumina-Zirconia (ZTA) Composites with Unstabilized Zirconia Modulation

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Materials Sciences and Applications 2021年第11期12卷 542-560页

作者： md. Abdul Gafur md. al-amin md. Saifur Rahman Sarker md. Zahangir alam Pilot Plant & Process Development Centre Bangladesh Council of Scientific and Industrial Research Dhaka Bangladesh Department of Applied Chemistry and Chemical Engineering Dhaka University Dhaka Bangladesh Kurigram Govt. College Kurigram Rangpur Bangladesh

Zirconia toughened alumina (ZTA) ceramics are very promising materials for structural and biomedical applications due to their high hardness, fracture toughness, strength, corrosion and abrasion resistance and excellent biocompatibility. The effect of unstabilized ZrO2 on the density, fracture toughness, microhardness, flexural strength and microstructure of some Zirconia-toughened alumina (ZTA) samples was investigated in this work. The volume percentage of unstabilized ZrO2 was varied from 0% - 20% whereas sintering time and sintering temperature were kept constant at 2 hours and 1580°C. The samples were fabricated from nanometer-sized (α-al2O3: 150 nm, monoclinic ZrO2: 30 - 60 nm) powder raw materials by the conventional mechanical mixing process. Using a small amount of sintering aid (0.2 wt% MgO) almost 99.2% of theoretical density, 8.54 MPam? fracture toughness, 17.35 GPa Vickers microhardness and 495.67 MPa flexural strength were found. It was observed that the maximum flexural strength and fracture toughness was obtained for 10 vol% monoclinic ZrO2 but maximum Vickers microhardness was achieved for 5 vol% ZrO2 although the maximum density was found for 20 vol% ZrO2. It is assumed that this was happened due to addition of denser component, phase transformation of monoclinic ZrO2 and the changes of grain size of α-al2O3 and ZrO2.

关键词： Zirconia Toughened alumina (ZTA) Mechanical Properties Toughening XRD SEM Grain Size

Non-Negative Integer Solutions of Two Diophantine Equations 2^x + 9^y = z² and 5^x + 9^y = z²

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Journal of Applied Mathematics and Physics 2016年第4期4卷 762-765页

作者： md. al-amin Khan Abdur Rashid md. Sharif Uddin Department of Mathematics Jahangirnagar University Dhaka Bangladesh

In this paper, we study two Diophantine equations of the type px + 9y = z2 , where p is a prime number. We find that the equation 2x + 9y = z2 has exactly two solutions (x, y, z) in non-negative integer i.e., {(3, 0, ... 详细信息

关键词： Exponential Diophantine Equation Integer Solutions

Design of a Multiband Patch Antenna for 5G Communication Systems

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Open Journal of Antennas and Propagation 2018年第1期6卷 1-14页

作者： Atik Mahabub md. Mostafizur Rahman md. al-amin md. Sayedur Rahman md. Masud Rana Department of Electronics and Communication Engineering KUET Khulna Bangladesh Department of Electrical and Electronic Engineering KUET Khulna Bangladesh

Currently, communication system requires multiband small antennas for 5G mobile applications. Driven this motivation, this paper proposes a multiband patch antenna for Wi-Fi, WiMAX and 5G applications. The proposed antenna can effectively operate at 2.4 GHz as Wi-Fi, 7.8 GHz as WiMAX and 33.5 GHz as 5G communication purposes. The proposed antenna arrays have given directional radiation patterns, very small voltage standing wave ratio, high gain (VSWR) and directivity for each aforementioned systems operating frequency. This antenna is made for multiband purpose which can be effective for not only Wi-Fi and WiMAX but also 5G applications.

关键词： 5G Communication Systems Multiband Patch Antenna Wi-Fi and WiMAX Systems

Analysis of Rate One Quasi-Orthogonal Space-Time Block Coding over Rayleigh Fading Channel

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International Journal of Communications, Network and System Sciences 2014年第6期7卷 196-202页

作者： md. Abdullah al amin Ranju Ragib Shakil Rafi Electronics & Communication Engineering Khulna University Khulna Bangladesh

Full-rate is very important in any data transmission coding. For transmitting data at low bit rate than full-rate code, higher modulation scheme is required. But it is impossible to design full rate orthogonal designs with complex constellation for more than two transmit antennas. Only alamouti code provides full-rate for two transmit antennas. In this paper, Bit Error Rate (BER) is calculated for Quasi-Orthogonal Space-time Block Coding (QOSTBC). Here we work with Rayleigh fading channel. We consider the codes which decodes pairs of symbols instead of simple separate decoding like Orthogonal Space-Time Block Coding. In Quasi-Orthogonal Space-time Block Code full-rate is achieved but full-diversity is sacrificed. Diversity is the most important techniques for providing reliable communication over fading channels. One of the diversity techniques that uses multiple transmit and/or receive antennas is space diversity. Multiple antenna technique provides a space diversity to struggle with the fading without necessarily sacrificing bandwidth resources, so the excellent solutions of removing the fading of the channel for broadband wireless communications is using space diversity. Then, with the constellation rotation of the symbol, rotated version of Quasi-Orthogonal Space-Time Block Code is generated. It provides full diversity. We simulate BER for QOSTBC, rotated QOSTBC, orthogonal STBC and for uncoded system. The simulation result shows that QOSTBC and rotated QOSTBC perform better than other systems. It shows that QOSTBC provides a full transmission rate but that rotated QOSTBC provides the full rate with the full diversity.

关键词： Orthogonal Space-Time Block Coding Quasi-Orthogonal Space-Time Block Coding Rayleigh Fading Rotated Quasi-Orthogonal Space-Time Block Coding