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Anther Culture in Crop Plants: Progress and Perspectives
M. Thoihidul Islam(M. Thoihidul Islam ),Mohammad Rashid Arif(Mohammad Rashid Arif ),Md. Toufiq Hasan(Md. Toufiq Hasan ),Arif Hasan Khan Robin(Arif Hasan Khan Robin ) 한국육종학회 2023 Plant Breeding and Biotechnology Vol.11 No.2
A resurrection has started in haploid and double haploid research in the twenty-first century. The haploid and double haploid could be achieved through in vivo and in vitro anther and microspore culture techniques. Fixing the homozygosity is the most striking benefit of androgenesis. Various factors like genotypic dependency, growth condition, developmental stage of the microspore, pre-treatment, culture media, regeneration media, growth hormones, and various chemicals have a direct effect. Wheat, rice, Brassica, and tobacco are the notable crops where anther and microspore culture has been utilized. These haploidy and double haploidy through anther culture served many purposes of basic and applied research. Especially, double haploid cultivars have been cultivating around the globe. In addition, for chromosome mapping, QTL mapping, marker-assisted selection, marker-assisted backcrossing, mutation breeding, genome-wide association study, genomic engineering, and genome editing, androgenesis based haploid and double haploid plants have been exploited due to the effectiveness. Recently, researchers are trying to explain albinism that happens during anther culture from an epigenetic perspective. Further prospects of haploid and doubled haploid research through anther culture have been described in this review.
Arif, M.,Ahmad, N.,Shahab, M.,Arslan, M. Asian Australasian Association of Animal Productio 1991 Animal Bioscience Vol.4 No.1
Responsiveness of the testis to pregnant mare's serum gonadotropin (PMSG) was studied in immature Nili-Ravi buffalo bulls. Four month old bull calves weighing between 66 to 100 kg raised under uniform condition, were treated with 1000 IU PMSG or vehicle, daily, for six days. PMSG induced an increase in the size of the testis, enlargement of the seminiferous tubules and activation of the spermatogonia. The number of differentiated Leydig cells in the testis of gonadotropin treated animals increased considerably over that of the control testes. A significant increase in plasma testosterone concentrations was observed 24 h following the first injection of PMSG and the levels continued to increase until day 6. In vehicle treated animals plasma testosterone levels remained more or less at pretreatment values. The data suggest that buffalo bull testis is functionally responsive to gonadotropin at an early stage of prepubertal development.
Analysis of Aging Effect on Human Walking Gait Using Detrended Fluctuation Analysis Technique
M. Arif,Y. Ohtaki,T. Ishihara,H. Inooka 한국과학기술원 인간친화 복지 로봇 시스템 연구센터 2002 International Journal of Assistive Robotics and Me Vol.3 No.4
Movement of center of gravity of the human body plays a crucial part in the stability of the human walking. In this paper, we have investigated the effect of aging on the acceleration of center of gravity using a portable 3D acceleration measurement system. Acceleration of the center of gravity data of young and elderly subjects is analyzed during normal walking using detrended fluctuation analysis technique. It was observed that the scaling exponents of elderly subjects in short term region are less than young subjects. It shows that walking of elderly subjects is less correlated in the short-term region putting them on more risk of falls.
M.S. Yaseen,G. Murtaza,Rana M. Arif Khalil 한국물리학회 2018 Current Applied Physics Vol.18 No.10
Structural, electronic, optical, and thermoelectric aspects of chalcopyrite LiGaX2 (X=S, Se and Te) compounds have been investigated by density functional theory (DFT) based Wien2k simulator. The optimized ground state parameters are calculated by Wu-Cohen generalized gradient approximation (WC-GGA) and electronic structures, which have been further improved by modified Becke-Johnson (mBJ) potential. Moreover, a comparative study is given among the contribution of three anions (S, Se and Te) in the same symmetry of tetragonal phase. The calculated band gaps of the studied compounds are 3.39, 2.83, and 1.96 eV for LiGaS2, LiGaSe2 and LiGaTe2, respectively. The observed band gaps consider the studied compounds are potential materials for optoelectronic devices. In addition, the optical response of the studied materials has been analyzed in terms of dielectric constants, refraction, absorption, reflectivity and energy loss function. We have also reported the thermoelectric properties like Seebeck coefficient, thermal and electrical conductivities, and figure of merit as function of temperatures by using BoltzTrap code. The high thermal efficiency and absorption spectra in the visible region make the studied materials multifunctional for energy applications.
Arif, Abu S.M.,Hashim, M.A.,Runa, R.A.,Chowdhury, E.H.,Rahman, Md Siddiqur,Song, Hee-Jong The Korean Society of Veterinary Service 2010 韓國家畜衛生學會誌 Vol.33 No.3
This study was conducted in the saltwater crocodile (Crocodylus porosus) for the occurrence of various surgical affections with their clinical management. During the period of January 2006 to June 2008, a total of 68 adult crocodiles were considered as reference population from the Reptiles Farm Ltd. at Bhaluka, Mymensingh. The occurrence of surgical affections of adult female (88.9%) was significantly (P<0.01) higher than male (11.1%). Prevalence of common surgical affections were wound: 72.2%, fibroma: 11.1% abscess: 5.6%, fracture: 5.6%, tail necrosis: 2.8%, myiasis: 2.8%. Wound was the highest among the affections. Among the identified wounds, biting wound was higher. In summer (57.7%) the occurrence of wound was higher compared to other seasons. In winter season (7.7%) the occurrence of abscess, myiasis, fibroma were higher compared to other seasons. Wounds and fibroma are the major surgical affections in salt water crocodile. The most common site of surgical affection was recorded in crocodile's tail (30.6%). It was suggested that minimal stress, allowing constant and easy access to water, removal of roots of the tree in the basking land of crocodiles pen, basking land of the pen is better filling up by sand, clinical surgical managements are essential for better health and production.
Investigation of half metallicity in Fe doped CdSe and Co doped CdSe materials
Suneela Arif,B. Amin,Iftikhar Ahmad,M. Maqbool,R. Ahmad,M. Haneef,N. Ikram 한국물리학회 2012 Current Applied Physics Vol.12 No.1
The objective of the present work is to evaluate half metallicity and spin dependent transport properties of iron doped CdSe and cobalt doped CdSe compounds. The spin-polarized band structures (semiconductor in one spin state and conductor in the other spin state) predict that Cd0.875Fe0.125Se and Cd0.875Co0.125Se are half metals. The calculated crystal filed splitting energy show larger energy gap between eg and t2g for Fe than Co doped CdSe compound. Furthermore, magnetization, exchange coupling and band-gap increase with decrease in the lattice constant. Overall, Cd0.875Fe0.125Se and Cd0.875Co0.125Se in the zinc-blend phase show half-metallic ferromagnetic nature and are expected to be potential materials for spintronic devices.
Renal Failure in a Female Muskrat
H M Arif Ullah(울라아리프),A. K. Elfadl(아메드 엘파들),SunYoung Park(박선영),Myung-Jin Chung(정명진),Ji-Yoon Son(손지윤),Hyun-Ho Yun(윤현호),Jae-Min Park(박재민),Jae-Hyuk Yim(임재혁),Seung-Jun Jung(정승준),Jin-Kyu Park(박진규),Kyu-Shik 한국생명과학회 2020 생명과학회지 Vol.30 No.7
야생 포유류의 신부전 증후군은 거의 보고가 없다. Muskrat (Ondatra zibethicus)는 중간 크기의 설치류이며 많은 질병을 가지고 있으나, 신부전 증후군은 보고된 바가 없으며, 본 케이스는 병리학적 진단을 위해 6개월령 암컷사향쥐의 다른 임상증후군 없는 상태로 부검을 실시하였다. 요관, 신장결석과 수진증을 관찰하였고, 결석에 의한 심각한 신장 손상과, 뇌 손상을 포함한 전신 출혈과 석회화가 관찰되었고, 이는 신장 손상으로 인한 요로결석과 장기 손상에 기인한 것이다. 괴사 및 미세석회화는 신장 피질 및 수질에서, 특히 근위 곡 세뇨관 및 신장의 수집관에서 검출되었다. 사구체의 초자양변성이 크게 관찰되었으며 이는 만성 신염을 나타내며. 이러한 소견은 특히 신장에 대한 진균성 독성 효과를 나타내는 것으로 사료된다. 또한, 폐에서 호중구 및 단핵 세포의 침윤이 관찰되었고, 비장에서도 만성 염증세포인 형질세포의 침윤이 관찰되었다. 본 소견에서는 사향쥐 신부전에 따른 사인은 오염된 사료섭취로 의심되는 것으로 판단된다. Renal failure syndrome in wild mammals is infrequently reported. Muskrat (Ondatra zibethicus) is a medium-sized rodent known to carry many diseases but rarely exhibiting renal failure. A six-month old female muskrat was submitted to our laboratory for pathological diagnosis, and necropsy revealed severe renal damage with sand-like lithiasis in the ureter, renal calculi, and hydronephrosis. All major organs, including the cerebrum, also showed systemic hemorrhage and calcification which may have been due to uremia induced by renal failure. Histopathologically, necrosis and microcalcification were detected in the renal cortex and the medulla, especially in the proximal convoluted tubules and collecting ducts of the kidney. Significant hyalinization of the glomeruli was also observed, and this suggested chronic nephritis. These findings would support mycotoxic effects, particularly on the kidney. Moreover, infiltration of neutrophils and mononuclear cells was observed in the lung and of plasma cells in the spleen. The definitive cause of the toxic effects in this case of muskrat renal failure could be attributed to contaminated food.