Highly Efficient Photocatalytic Studies on Bi36 Fe2 O57 Ceramic Synthesized by Chemical Route

Manish Kumar Verma,Vinod Kumar,Upakar Patel,Vishnu Shankar Rai,Anup Kumar,Arup Kumar De,Aditya Kumar Prajapati,Dinesh Prajapati,Kedar Sahoo,Tapas Das,N. B. Singh,K. D. Mandal 한국전기전자재료학회 2023 Transactions on Electrical and Electronic Material Vol.24 No.5

Bi36 Fe2 O57 (BFO) polycrystalline ceramic was synthesized by economical chemical route. The single-phase formation of BFO ceramic was confirmed by powder X-ray diffraction studies. Nanosized formation of BFO ceramics established by XRD and TEM analysis. The bimodal distribution of grain size is observed with size ranging from 50 to 600 nm. It observed that the Bi36 Fe2 O57 photocatalyst exhibited higher catalytic activity for the degradation of Methylene Blue (MB) under visible-light irradiation The oxidation state of elements present in the BFO ceramic, was confirmed by XPS studies. The pseudocapacitive nature of BFO ceramic was observed by cyclic Voltammetry. The dielectric constant of BFO ceramic was found 375 at 1 kHz at 300 K. The dielectric loss was found 0.51 at 100 kHz and 300 K.

Normal and Abnormal Fertilisation of Zebu Cattle Oocytes In Vitro

Anup Kumar Talukder,Mohammed Shamsuddin,Mohammad Bozlur Rahman,Farida Yeasmin Bari,John J parish 사단법인 한국동물생명공학회 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 × 106/mL) of zebu (n = 7) and crossbred bulls (n = 7). After 18 h of sperm-COCs co-incubation at 39℃ with 5% CO2 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.

Prevalence of antibiotic resistance in lactic acid bacteria isolated from traditional fermented Indian food products

Anup Kumar Ojha,Nagendra Prasad Shah,Vijendra Mishra,Neela Emanuel,Neetu Kumra Taneja 한국식품과학회 2023 Food Science and Biotechnology Vol.32 No.14

The emergence of antimicrobial resistance (AMR) in lactic acid bacteria (LAB) raises questions on qualified presumptive safety status and poses challenge of AMR transmission in food milieu. This study focuses on isolation, identification and characterization of AMR in LAB prevalent in traditional fermented Indian food products. The analysis of 16SrRNA based phylogenetic tree showed placements of isolates among four different genera Lactobacillus, Enterococcus, Weissella and Leuconostoc. In E-strip gradient test of susceptibility to 14 different antibiotics, over 50% of isolates showed resistance to ampicillin, chloramphenicol, ciprofloxacin, erythromycin, kanamycin, linezolid, streptomycin, trimethoprim and vancomycin. A multivariate principal component analysis, an antibiogram and multiple antibiotic resistance index-values (> 0.2) indicated presence of multidrug-resistance among the isolates. This study reports prevalence of an alarmingly high rate of AMR LAB strains in traditional fermented foods and is important to regulators and public health authorities for developing strategies to control transmission in food systems.

Biometry of Genitalia, Incidence of Gynecological Disorders and Pregnancy Loss in Black Bengal Goat : An Abattoir Study

Anup Kumar Talukder,Md. Ataur Rahman,Md. Taimur Islam,Abu Nasar Md,Aminoor Rahman 한국수정란이식학회 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 ± 2.3) and right ovaries (7.4 ± 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 ± 0.1 cm, 3.3 ± 0.5 cm and 6.8 ± 1.3 cm, 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.

Biometry of Genitalia, Incidence of Gynecological Disorders and Pregnancy Loss in Black Bengal Goat : An Abattoir Study

Anup Kumar Talukder,Md. Ataur Rahman,Md. Taimur Islam,Abu Nasar Md.Aminoor Rahman 사단법인 한국동물생명공학회 2015 한국동물생명공학회지 Vol.30 No.1

This study was aimed to determine the biometry of genital organs, incidence of gynecological disorders and pregnancyloss in Black Bengal goat (Capra hircus). Genitalia of 118 does were collected from local abattoirs. Biometric parametersof genital organs were measured and gross and histopathological examinations were carried out for detectionof abnormalities. For gravid uterus, age of the fetus was determined by measuring crown-rump length. There was nosignificant difference in the length, width and weight of right and left ovaries (P>0.05). However, the number offollicles between left (5.3 ± 2.3) and right ovaries (7.4 ± 2.7) varied significantly (P<0.05). The mean length of rightfallopian tube and uterine horn were not varied with those of left fallopian tube and uterine horn. The length of uterinebody, cervix and vagina were 1.3 ± 0.1 cm, 3.3 ± 0.5 cm and 6.8 ± 1.3 cm, respectively. Overall, 29 (24.6%) genitaliahad abnormalities. Fifteen genitalia (12.7%) had ovarian abnormalities including ovaro-bursal adhesions (6.8%), parovariancyst (5.1%) and follicular cyst (0.9%). Uterine abnormalities were found in 12 genitalia (10.2%) and predominantuterine 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 firstmonth (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.

Biometry of Genitalia, Incidence of Gynecological Disorders and Pregnancy Loss in Black Bengal Goat : An Abattoir Study

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.

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.

STUDIES ON GRAVITY BLIND BACKFILLING FOR GROUND STABILIZATION ABOVE ABANDONED UNDERGROUND MINES

Samir Kumar Pal,Subir Kumar Mukhopadhyay,Susmita Panda,Anup Kumar Tripathi 한국암반공학회 2010 한국암반공학회 학술대회 및 세미나 자료집 Vol.2010 No.10

Blind hydraulic backfilling is a commonly adopted technique for subsidence control of the strata over unapproachable water-logged underground excavations, particularly in coal mining. There are three variants in blind backfilling, viz., the hydro-pneumatic, the pumped-slurry, and the simple gravity backfilling. This paper mainly describes investigations carried out on gravity blind backfilling technique on the experimental model as well as in the field, since it is the simplest and the easiest among the three methods which can be used for stabilization of ground over old abandoned water-logged mines. On examination of the filling process, it was revealed that the basic process of filling occurs by sand transportation along one or more meandering channels. In the study, the relative influence of sand, water and air flow rates on the area of filling from a single inlet point and the hydraulic pressure loss per unit length were studied in detail. Inlet pressure variation with time, known as pressure signature, have been used to study the changes in the physical filling phenomena inside meandering channels and pre-jamming phase of filling. This procedure has the potential to maximize the sand throughput from a single inlet pipe at minimum possible time. Of all the above mentioned methods, simple gravity backfilling was found to be economic as well as efficient, especially when the flow rates are high. Some empirical relationships developed using multiple regression technique for use by the practicing engineers for the process control while employing this process are also discussed in the paper.

Relationship between Semen Quality Parameters and Field Fertility of Bulls

Sushanto Kumar Rabidas,Anup Kumar Talukder,Md. Golam Shahi Alam,Farida Yeasmin Bari 사단법인 한국동물생명공학회 2012 한국동물생명공학회지 Vol.27 No.1

A study was conducted on four crossbred bulls, used as artificial insemination (AI) sires, to correlate their semen quality with their non return rate (NRR). Semen was collected once a week via an artificial vagina, diluted in egg yolk-citrate and maintained at +7℃ for three days. It was evaluated for sperm motility, viability, morphology immediately after collection and was examined daily for sperm motility, viability and morphology of acrosome, mid piece and tail for a total of three days. A total of 2016 cows were inseminated by two AI technicians. The proportions of sperm with normal heads were 83.4% (63.7~91.7%), the proportion of spermatozoa exhibiting normal morphology (acrosome, mid piece and tail), motility and viability were 89.2% (82.3~92.0%), 71.3% (61.7~75.0%) and 76.7% (65.7~85.0%), respectively in fresh ejaculates. Sperm motility and sperm viability was significantly (p<0.05) lower in Holstein-Friesian × Local bull than in other bulls during all three days of storage. The overall NRR for four bulls was 82.7% (72.9-87.5%). Bulls with higher sperm motility, viability and normal morphology of spermatozoa of individual bull had significantly (each p<0.05) higher NRR. The highest (p<0.01) NRR (87.5%) was observed in a Red Chittagong bull whose semen qualities were significantly (p<0.05) higher than Holstein-Friesian × Local bull (NNR 72.9%). The results of the present study concluded that NRR at 56 days post AI is related to parameters of semen quality. Therefore, semen evaluation may allow the discarding of bulls with poor fertility in an AI program

Relationship between Semen Quality Parameters and Field Fertility of Bulls

Rabidas, Sushanto Kumar,Talukder, Anup Kumar,Alam, Md. Golam Shahi,Bari, Farida Yeasmin 韓國受精卵移植學會 2012 한국동물생명공학회지 Vol.27 No.1

A study was conducted on four crossbred bulls, used as artificial insemination (AI) sires, to correlate their semen quality with their non return rate (NRR). Semen was collected once a week via an artificial vagina, diluted in egg yolk-citrate and maintained at for three days. It was evaluated for sperm motility, viability, morphology immediately after collection and was examined daily for sperm motility, viability and morphology of acrosome, mid piece and tail for a total of three days. A total of 2016 cows were inseminated by two AI technicians. The proportions of sperm with normal heads were 83.4% (63.7~91.7%), the proportion of spermatozoa exhibiting normal morphology (acrosome, mid piece and tail), motility and viability were 89.2% (82.3~92.0%), 71.3% (61.7~75.0%) and 76.7% (65.7~85.0%), respectively in fresh ejaculates. Sperm motility and sperm viability was significantly ( <0.05) lower in Holstein-Friesian Local bull than in other bulls during all three days of storage. The overall NRR for four bulls was 82.7% (72.9-87.5%). Bulls with higher sperm motility, viability and normal morphology of spermatozoa of individual bull had significantly (each <0.05) higher NRR. The highest ( <0.01) NRR (87.5%) was observed in a Red Chittagong bull whose semen qualities were significantly ( <0.05) higher than Holstein-Friesian Local bull (NNR 72.9%). The results of the present study concluded that NRR at 56 days post AI is related to parameters of semen quality. Therefore, semen evaluation may allow the discarding of bulls with poor fertility in an AI program.