Browsing by Author "MD. AL-AMIN"

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All-Optical Sorting and Separation of Rayleigh Objects from an eight-particle cluster
(North-south University, 2021-04-30) Musayed Ahmed; Musa Talukder; MD. AL-AMIN; Dr. Mahdy Rahman Chowdhury
In this paper we try to sort three different types of particles. Mainly we take 3 types of particles and total particles are 8, all with a radius of 100nm. Those particles are chiral, dielectric and plasmonic material on nanometer scale. We put the particles in two different optical set-ups. After falling light particles showing their characteristics. The incident light for both cases was projected from above with an incident angle of 45 degrees with horizontal x-axis. Under the influence of plane waves, our study shows that some particles are getting pulling force, some particles are pushing force and some particles are getting lateral force. Therefore, they are being trapped. And we can easily find out the particles. The light scattering was 45 degrees. Understanding the sort of particles from an eight particles cluster based on distinctive optical forces has not been detailed so distant. Such an identification of the sorts of diverse particles is called optical sorting. In most of the set ups, optical sorting has been detailed for sweep based sorting of Rayleigh sized single particles. In expansion, the thought of all optical sorting has never been connected to sort and partition Rayleigh objects from a blend of particles. In this report, two distinctive optical setups have been proposed. Enlightened by a directly polarized plane wave in a molecule cluster developed with chiral, plasmatic, and dielectric nanoparticles in an air medium (optical set-up 1), half drenched in water (optical set-up 2). At to begin with, by shifting the light wavelengths, we have appeared that optical sorting isn't conceivable for eight particles cluster when they are put oppositely beneath the light. Afterward, in the same molecule cluster in all setups light was illuminated at an angle of 𝜃 = 40 along the +X axis. By varying the wavelength of the light, it has been observed that the dielectric get counter-intuitive pulling constrain because of the current density of the nearby plasmonic particle changing from chaotic to linear state, plasmonic getting pushing constrain due to the transferred momentum of photon and chiral get lateral drive mainly due to the induced magnetic dipole on the chiral nanoparticle. Such optical sorting by utilizing three totally diverse strengths without using any chemical may open a totally novel way for molecule discovery, accumulation and the organization of layouts for organic and colloidal science within the close future
EFFECT OF DIFFERENT COMBINATION OF BIOCHAR AND VERMICOMPOST ON YIELD AND SEED QUALITY OF LENTIL
(INSTITUTE OF SEED TECHNOLOGY, 2021) MD. AL-AMIN
The pot experiment was conducted at the farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207 during the period of October 2019 to February 2020 to study the effect of different combination of biochar and vermicompost on yield and seed quality of lentil. Two factors viz., Factor A: two lentil varieties; V 1 (BARI masur-6) and V 2 (BARI masur-7) and Factor B: Biochar + vermicompost (6 levels); T 1 (0 ton biochar ha ii -1 + 0 ton vermicompost ha ), T 2 (5 ton biochar ha -1 + 0 ton vermicompost ha -1 ), T 3 (0 ton biochar ha -1 + 5 ton vermicompost ha -1 ), T 4 (1 ton biochar ha -1 + 4 ton vermicompost ha -1 ), T 5 (4 ton biochar ha +1 ton vermicompost ha -1 ) and T 6 (2.5 ton biochar ha -1 +2.5 ton vermicompost ha ) were considered for the present study. The experiment was laid out in a randomized complete block design (RCBD) with three replications. BARI masur-6 (V 1 ) and BARI masur-7 (V 2 ) showed non-significant difference between them for most of the yield and seed quality parameters. Treatment T 5 (4 ton biochar ha -1 +1 ton vermicompost ha -1 ) showed the best performance on seed yield and quality and gave the highest dry weight plant -1 (10.16 g), number of pods plant -1 (63.08), number of seeds pod (1.79), number of seeds plant -1 (113.50), seed yield plant -1 (2.82 g), stover yield plant (3.57 g), biological yield plant -1 (6.38 g), harvest index (44.17%) seed germination (91.50%), shoot length (5.32 cm) and root length (3.22 cm) of seedlings after 12 days of germination and seed vigor index (781.00) compared to other treatments including control. treatment combination of V 2 T 5 registered the highest dry weight plant (10.24 g), number of pods plant -1 (63.40), number of seeds pod -1 (1.80), number of seeds plant -1 (114.70), seed yield plant -1 (2.86 g), stover yield plant -1 (3.59 g), biological yield plant -1 (6.6.45 g), harvest index (44.47%), seed germination (92.00%), shoot length (5.36 cm) and root length (3.26 cm) of seedlings after 12 days of germination and seed vigor index (793.00) compared to other treatment combinations. So, the treatment combination, V 2 T 5 (BARI masur-7 with 4 ton biochar ha + 1 ton vermicompost ha combinations.
YIELD PERFORMANCE OF WHITE MAIZE (SAUWM 9-3-3) UNDER VARYING FERTILIZER LEVELS AND SPACINGS IN KHARIF-2 SEASON
(DEPARTMENT OF AGRONOMY, 2020) MD. AL-AMIN
An experiment was conducted during May to September 2019 at Sher-e-Bangla Agricultural University, Dhaka-1207 to evaluate the yield performance of white maize as influenced by different levels of fertilizer under different spacing. The experiment comprised two different factors; (1) three levels of fertilizer application viz. F 1 (Recommended doses of fertilizer (RDF), F 2 ii (25% less than RDF) and F 3 (25% higher than RDF); and (2) three different plant spacing viz. S 1 (60 cm × 25 cm), S 2 (50 cm × 25 cm) and S 3 (40 cm × 25 cm). Both the fertilizer dose and spacing level along with their interactions had significant effect on almost all vegetative and reproductive parameters. The highest stover yield(14.8 t ha 1 ) was obtained from F 2 S 3 -1 ) and the lowest stover yield (5.83 t ha (25% less than RDF and 40 cm × 25 cm) and F 3 (25% higher than RDF and 60 cm × 25 cm) treatment combinations, respectively. The F 2 (25% less than RDF) in combination with S 2 (50 cm × 25 cm) performed the best and obtained the highest cob length (18.45 cm), number of rows cob -1 (13.67), number of grains row -1 (25.89) number of grains cob -1 (354.54), weight of grains cob (89.56 g), weight of cob (118.56 g), 100- grain weight ( 35.70 g) which contributed to obtain the highest grain yield (8.44 t ha -1 ) as well as biological yield (22.08 t ha -1 )