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Growth performance of Avicennia officinalis L. and the effect of spacing on growth and yield of trees planted in the Western coastal belt of Bangladesh

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Journal of Forestry Research 2014年第4期25卷 835-838页

作者： Md. abdul quddus Miah Sk. Ahiul Islam Md. Ahsan Habib Md. Golam Moula Plantation Trial Unit Division Bangladesh Forest Research Institute Rupatoli Barisal-8206 Bangladesh

A trial ofAvicennia officinalis L. with five different spacings was conducted in the newly accreted lands along the western coastline （Patuakhali district） of Bangladesh since 1993 to assess growth perform- ance and the effect of spacing on tree growth. Data on tree density, height, diameter, bole height, crown diameter were recorded and ana- lyzed when the stand was 19 years old. Mean height ranged from 12.89-13.52 m and diameter at breast height （dbh） from 26.57-32.16 cm in plots of different spacings. The mean annual height increment ranged from 0,67-0.71 m, mean annual diameter increment from 1.40-1.69 cm and wood volume from 6.02-10.04 ***＇*** in different treatments. Significantly greater diameter （32.16 cm） and wood volume （10.04 ***.a-1） were obtained with wider （2.13 m × 2.13 m） spacing than with closer spacings. But tree growth was unaffected by other spacings. Growth data were also recorded from other .4. officinalis plantations raised by Forest Department （FD） on different islands in Patuakhali and Bhola districts of Bangladesh. At these sites, mean annual height incre- ment ranged from 0.33-0.62 m, mean annual diameter increment from 0.72-1,37 cm and wood volume from 1.55-5.73 m3·ha-1·a·-1. The growth performance of A. offindicated that the newly aecreted lands along the western shoreline may be suitable for raising Avicennia planta- tions for the enrichment of coastal vegetation.

关键词： growth Avicennia officinalis plantation spacing coastal belt

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Assessment of spermatogenesis in camels via seminiferous tubule staging and testosterone profiling

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Asian pacific Journal of Reproduction 2024年第3期13卷 133-142页

作者： Saif Ullah abdul quddus Quanwei Wei Wael Ennab Sheeraz Mustafa Jiahao Sun Rahmani Mohammad Malyar abdul Baseer Dagan Mao Fangxiong Shi College of Animal Science and Technology Nanjing Agricultural UniversityNanjing 210095China Faculty of Veterinary and Animal Sciences Lasbela University of Agriculture Water and Marine SciencesBalochistanPakistan Faculty of Veterinary and Animal Sciences Ziaddin University Karachi Pakistan

Objective:To investigate the successive morphological stages of spermatogenesis,hormonal regulation,and testosterone profile in dromedary camel ***:Testicular tissue samples were obtained from 12 dromedary bull camels aged 7 to 8 at a local *** histological assessment involved tissue processing,hematoxylin and eosin(H&E)staining,and examination under a *** analysis,germ cell identification,and assessment of seminiferous tubules and maturation were *** assay was performed by radioimmunoassay using blood samples collected at regular ***:The study revealed 12 phases of the dromedary camel's seminiferous epithelium cycle,highlighting distinct morphological characteristics and cellular *** migration,maturation,cap formation,and the Golgi-mediated synthesis of proacrosomal vesicles were also explained in dimension,as were the steps of acrosome *** and mature sperm cells were present when spermatogenesis phases were *** analysis of the dimensions of seminiferous tubules revealed specific measures for diameter,area,and epithelial height about luminal ***,there were noticeable variations in the serum testosterone concentrations during the study period,indicating temporal ***:This study outlines the spermatogenesis process in dromedary camels across 12 stages,emphasizing cellular dynamics and acrosomal *** also provides seminiferous tubule measurements and observes seasonal testosterone fluctuations,offering insights into reproductive regulation and potential strategies for camel breeding conservation.

关键词： Spermatogenesis Camel Testosterone profile Morphological staging

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Convection Heat Transfer from Heated Thin Cylinders Inside a Ventilated Enclosure

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Semiconductor Science and Information Devices 2022年第2期4卷 10-16页

作者： Ali Riaz Adnan Ibrahim Muhammad Sohail Bashir Muhammad abdullah Ajmal Shah abdul quddus Department of Mechanical Engineering Pakistan Institute of Engineering and Applied SciencesIslamabad45650Pakistan School of Engineering Science University of Science and Technology of ChinaHefeiAnhui230027China Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Soft Matter ChemistryDepartment of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui230026China

Experimental study was conducted to determine the effect of velocity of axial fan,outlet vent height,position,area,and aspect ratio(h/w)of ventilated enclosure on convection heat *** wooden ventilated enclosure having top and front transparent wall was made up of Perspex for visualization,and internal physical dimensions of box were 200 mm×200 mm×400 *** vent was at bottom while outlet vents were at the side and top *** heated cylindrical heat source having 6.1 slenderness ratio was fabricated and hanged at the centre of the *** calculate heat transfer rates,thermocouples were attached to the inner surface of heat source with silica *** source was operated at constant heat flux in order to quantify the effect of velocity of air on heat *** was observed that average Nusselt number was increased from 68 to 216 by changing velocity from 0 to 3.34 m/s at constant modified Grashof number i.e.5.67E+*** variation in outlet height at the front wall did not affect heat transfer in forced convection ***,Nusselt number decreased to 5%by changing the outlet position from top to the front wall or by 50%reduction in outlet area during forced *** rise in temperature of enclosure increased from 8.19 K to 9.40 K by increasing aspect ratio of enclosure from 1.5 to 2 by operating heat source at constant heat flux i.e.541.20 w/m^(2).

关键词： Experimentation Ventilated enclosures Convection heat transfer Dimensionless data

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Outcome of Long Segment Transpedicular Screw Fixation in Unstable Thoracolumbar Spine Injury with Incomplete Neurological Deficit

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Journal of Biosciences and Medicines 2020年第3期8卷 166-187页

作者： Shah Md. Rezaul Karim A. K. M. Shahidur Rahman Syed Abdus Sobhan Md. Shahidul Islam Akon Muhammad Akter Hossain Ashraf Ali Shah Newas Md. Ruhul quddus Md. Moshiur Rahman Mollick Department of Surgery Sheikh Hasina Medical College Hospital Habiganj Bangladesh Department of Nephrology Bangabandhu Sheikh Mujib Medical University (BSMMU) Dhaka Bangladesh Department of Orthopaedic Surgery Dhaka Medical College Hospital (DMCH) Dhaka Bangladesh Department of Anatomy Chandpur Medical College Chandpur Bangladesh Department of Cardiology Abdul Malek Ukil Medical College Hospital Noakhali Bangladesh Department of Orthopaedic Surgery National Institute of Traumatology and Orthopedic Rehabilitation (NITOR) Dhaka Bangladesh Department of Biochemistry Pabna Medical College Pabna Bangladesh Department of Orthopaedic Surgery Sheikh Hasina Medical College Hospital Habiganj Bangladesh

Background: Long segment transpedicular screw fixation in thoracolumbar spine injury has gained popularity in the last decades as it provides immediate stability, prevents further risk of complications and allows early mobilization of patient. Objectives: Evaluation of clinical and functional outcome after long segment transpedicular screw fixation in unstable thoracolumbar spine injury with incomplete neurological deficit patients. Methods: This quasi experimental study was conducted at Dhaka Medical College and Hospital (DMCH), Dhaka, Bangladesh from January 2016 to December 2017. A total of twenty four (24) patients with traumatic unstable fracture of the thoracolumbar spine with incomplete neurological deficit underwent long segment transpedicular screw fixation were included in this study. Clinical and radiologic outcomes were assessed pre-operatively and post-operatively. Results: A total of 24 patients aged between 20 - 60 years of both sexes (Male-21, Female-03) were included in this study. Their mean (±SD) age was 33.12 (±8.57) years. Most of them were farmer [09 (37.5%)] and day labour [08 (33.33%)]. Motor vehicle accidents were the most common [16 (66.67%)] cause of injury and then fall from height [08 (33.33%)]. The most common level of injury involved was L1-10 (41.67%) patients, followed by L2-07 (29.17%), T12-05 (20.83%) and T11-02 (8.33%) of the study patients. Burst fracture was the commonest [22 (91.67%)] type of fracture followed by Chance fracture [02 (8.33%)]. Pre-operative mean (±SD) Cobb angle, Kyphotic deformation of vertebral body, Beck index and vertebral compression deformity were 21.83 ± 4.5 degrees, 22.09 ± 4.40 degrees, 0.78 ± 2.65 and 0.18 ± 0.93 mm respectively, after procedure which were significantly (p Conclusions: Long segment transpedicular screw fixation is an effective method of treatment in patients having thoracolumbar spine injury with incomplete neurological deficit.

关键词： Neurological Deficit Transpedicular Screw Fixation Unstable Thoracolumbar Spine Injury

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