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Talukder M. A. H.,Islam M. K.,Munir M. S.,Salahuddin M. 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.83 No.1
The photoelectric efects on the instability of the current-driven dust ion-acoustic (DIA) waves in a collisional and streaming dusty plasmas are theoretically investigated using fuid model with dust charge fuctuation considering dust grains as negatively charged. It is found that the photoelectric efects through dust charge fuctuation give the growth of the DIA waves beside the damping efects of collision and streaming of the plasma species. Growth rate of the DIA waves are numerically investigated using the values of appropriate plasma parameters.
Talukder, Anup Kumar,Rahman, Md. Ataur,Islam, Md. Taimur,Rahman, Abu Nasar Md. Aminoor The Korean Society of Embryo Transfer 2015 한국동물생명공학회지 Vol.30 No.1
This study was aimed to determine the biometry of genital organs, incidence of gynecological disorders and pregnancy loss in Black Bengal goat (Capra hircus). Genitalia of 118 does were collected from local abattoirs. Biometric parameters of genital organs were measured and gross and histopathological examinations were carried out for detection of abnormalities. For gravid uterus, age of the fetus was determined by measuring crown-rump length. There was no significant difference in the length, width and weight of right and left ovaries (P>0.05). However, the number of follicles between left ($5.3{\pm}2.3$) and right ovaries ($7.4{\pm}2.7$) varied significantly (P<0.05). The mean length of right fallopian tube and uterine horn were not varied with those of left fallopian tube and uterine horn. The length of uterine body, cervix and vagina were $1.3{\pm}0.1cm$, $3.3{\pm}0.5cm$ and $6.8{\pm}1.3cm$, respectively. Overall, 29 (24.6%) genitalia had abnormalities. Fifteen genitalia (12.7%) had ovarian abnormalities including ovaro-bursal adhesions (6.8%), parovarian cyst (5.1%) and follicular cyst (0.9%). Uterine abnormalities were found in 12 genitalia (10.2%) and predominant uterine lesion was endometritis (6.8%) followed by adenomyosis (1.7%), hemorrhagic lesion on endometrial surface (0.9%) and cyst in broad ligament (0.9%). In addition, cyst in fallopian tube (0.9%) and vagina (0.9%) were recorded. The proportion of slaughtered pregnant goats was 15.3% (18/118). The pregnancy wastage was highest in the first month (50.0%) followed by second (33.3%) and third (16.7%) month. It can be concluded that ovaro-bursal adhesions, parovarian cyst and endometritis are the gynecological disorders of major concern in Black Bengal goat.
Talukder, Niladri,Lee, Ki Yong Elsevier 2018 Fuel Vol.234 No.-
<P><B>Abstract</B></P> <P>Laminar flame speeds and Markstein lengths of methyl decanoate (MD)-air mixtures were measured within a range of equivalence ratio at different elevated pressures and temperatures using outwardly propagating spherical flames developed inside a constant volume combustion chamber. Shadowgraph technique was employed to observe the temporal evolution of flame fronts. A numerical scheme was used to justify all the experimental data of laminar flame speeds. The numerical scheme was developed based on a short mechanism of methyl decanoate oxidation. A sound agreement was observed between the numerical predictions and experimentally obtained data of laminar flame speeds. Markstein lengths were calculated to quantify the effect of stretch on the flame front at different initial conditions. The study provided viable data of laminar flame speeds and Markstein lengths of methyl decanoate-air flames at different initial conditions which were also well conforming to the established theories of conventional fuels regarding of the effects of equivalence ratio, pressure, and temperature variation on laminar flame speed.</P>
Normal and Abnormal Fertilisation of Zebu Cattle Oocytes In Vitro
Talukder, Anup Kumar,Shamsuddin, Mohammed,Rahman, Mohammad Bozlur,Bari, Farida Yeasmin,Parish, John J 韓國受精卵移植學會 2009 한국동물생명공학회지 Vol.24 No.2
Successful in vitro embryo production heavily relies on the normal maturation and fertilisation of oocytes. We examined the normal and abnormal fertilisation of zebu cattle oocytes matured in vitro. Immature cumulus oocyte complexes (COCs) from zebu cattle ovaries at slaughter were matured in vitro (IVM) for 24 h. The oocytes were either fixed, stained and examined for nuclear changes or fertilised in vitro (IVF) with Percoll-separated, heparintreated spermatozoa (1.0 /mL) of zebu (n = 7) and crossbred bulls (n = 7). After 18 h of sperm-COCs co-incubation at C with 5% in humidified air, the presumptive zygotes were fixed, stained and examined for pronuclei. The number of oocytes retrieved per ovary was 5.4 0.7. The percentage of matured oocytes was 73.0. The difference in motility of spermatozoa before and after Percoll seperation was significant (p<0.001). The percentages of normal and abnormal fertilisation (polyspermia and oocytes with one pronucleus) varied significantly depending on individual bulls (p<0.05). A protocol for IVF of IVM oocytes in Bangladeshi zebu cattle is developed. A future study may elucidate the capacity of such IVM-IVF oocytes to develop to the blastocyst stage for transfer to surrogate mother.
Himel Talukder,Sejuti Das Tinni,Jahid Hasan Tipu 한국동물유전육종학회 2020 한국동물유전육종학회지 Vol.4 No.4
Objectives:This study was undertaken on Japanese quails to evaluate their productive and reproductive performance in Sylhet Sadar Upazilla, Sylhet. Materials and Methods:Total 942 quails and 250 eggs of different private farms of Sylhet Sadar Upazilla were observed and studied. The traits studied include body weight, morphological traits, and reproductive traits. Results:Results showed that, mean hatch weight and mature body weight (20 weeks) of Japanese quails were 5.74±1.14gm and 170.02±5.85gm respectively. At adult age (12 weeks) mean shank length, body length, wing length and breast girth were 3.91±0.16, 18.05±1.02, 15.20±0.95, 7.30±0.12cm respectively. Mean age at sexual maturity, was 54.06±1.78 days while weight of first egg and average egg weight were 7.72±0.18 and 12.72±1.95gm respectively. Henday egg production and Hen-housed egg production were 5.64±1.41% and 11.49±4.96%, respectively. Percentage mean fertility was 78.40±4.05 while that of the percentage mean hatchability of eggs was 63.59±5.08. Percentage mean reproductive capacity was 70.28±3.53 and mean embryonic mortality was 26.82±2.94%. Conclusions:It was concluded that given the productive and reproductive estimates, Japanese quail can serve as an alternate livestock species that canameliorate shortage of protein intake in environment studied.