Topography of ganglion cells in the retina of the duck (Anas platyrhynchos var. domesticus)     

Mohammad Lutfur RAHMAN  Masato AOYAMA  Shoei SUGITA 《Animal Science Journal》2007,78(3):286-292

The purpose of this study was to define ganglion cell density, size and topography in the retina of the mallard duck. After killing adult mallard ducks (Anas platyrhynchos var. domesticus), their eyes were removed using pentobarbital (30 mg/kg). The retinas were isolated, whole mount specimens were prepared by staining with 0.1% cresyl violet and then fixing the tissues for study. The retinal ganglion cells were counted, mapped and measured. The mean total number of ganglion cells was estimated at approximately 1.7 × 10⁶ and the retinal area centralis had the highest ganglion cell density with 15 820 cells/mm². The number of ganglion cell bodies was highest in the temporal area, followed by the nasal, dorsal and ventral areas. Ganglion cell size ranged from 56 to 406 μm². A population of small ganglion cells persisted into the central area just above the optic disc and the largest soma area was in the ventral zone of the retina. This localization of ganglion cells suggests that the quality of vision is not equal in all the areas of the duck retina and the central part may have the highest vision quality as a function of the retinal ganglion cells.  相似文献   

Metoclopramide protection of diazinon-induced toxicosis in chickens     

M. H. I. Al-Zubaidy  F. K. Mohammad 《Journal of veterinary science (Suw?n-si, Korea)》2007,8(3):249-254

  相似文献   

Prevalence and risk factors of Avian Influenza Viruses among household ducks in Chattogram,Bangladesh     

Rahman  Md. Ashiqur  Belgrad  Joseph P.  Sayeed  Md. Abu  Abdullah  Md. Sadeque  Barua  Shanta  Chisty  Nurun Nahar  Mohsin  Md. Abu Shoieb  Foysal  Mohammad  Hossain  Mohammad Enayet  Islam  Ariful  Akwar  Holy  Hoque  Md Ahasanul 《Veterinary research communications》2022,46(2):471-480

Veterinary Research Communications - Avian influenza viruses (AIV) increase commercial and backyard poultry mortality and morbidity, reduces egg production, and elevates public health risk....  相似文献   

Effects of urea-N fertilizer dosage supplemented with Ipil-Ipil tree litter on yield of rice and insect prevalence   总被引：2，自引：0，他引：2  

M. R. Abdullah  K. L. Hossain 《林业研究》2006,17(4):335-338

Introduction Leaf litter is a very important organic source of soil fertility. The decomposition of leaf litter influences the amount of N available for plant uptake. Leaf litter supplies carbon, nitrogen, phosphorus, potassium and other nutrients in the …  相似文献   

A new C-benzylated chalcone from Desmos chinensis   总被引：1，自引：0，他引：1  

Mukhlesur Rahman M  Qais N  Rashid MA 《Fitoterapia》2003,74(5):511-514

A new C-benzylated chalcone was isolated from the leaves of Desmos chinensis. Its structure was established as 2',4'-dihydroxy-3'-(2,6-dihydroxybenzyl)-6'-methoxychalcone on the basis of spectroscopic data.  相似文献   

E-octadec-7-en-5-ynoic acid from the roots of Capparis zeylanica   总被引：1，自引：0，他引：1  

Haque ME  Haque M  Rahman MM  Rahman MM  Khondkar P  Wahed MI  Mossadik MA  Gray AI  Sarker SD 《Fitoterapia》2004,75(2):130-133

A new fatty acid, E-octadec-7-en-5-ynoic acid (1), has been isolated from chloroform extract of the roots of Capparis zeylanica. The structure of this compound was established primarily by 1D and 2D-NMR spectroscopy.  相似文献   

Modeling frequency distributions of tree height,diameter and crown area by six probability functions for open forests of <Emphasis Type="Italic">Quercus persica</Emphasis> in Iran     

Mehrdad Mirzaei  Jalal Aziz  Ali Mahdavi  Asma Mohammad Rad 《林业研究》2016,27(4):901-906

The prediction of the distribution of quantitative variables in a forest stand is of great interest to forest managers, for the evaluation of forest resources and scheduling of future silvicultural treatments. The aim of this research was to model the distribution of quantitative variables for Quercus persica in open forests in Iran. To investigate the probability distribution of trees in natural stands, 642 trees were selected for measurement using a systematic random sampling method. Selected trees were measured and data were analyzed. Gamma, beta, normal,lognormal, exponential and Weibull probability distributions were fitted to the height distribution of trees. Variables of distribution functions were estimated using the maximum likelihood estimation method. Actual probability and probability which derived from functions was compared using Kolmogorov–Smirnov and Anderson–Darling tests. Beta, Weibull and Weibull probability distributions explained the distributions of tree height, DBH and crown area.  相似文献   

Flexural and visual characteristics of fibre-managed plantation Eucalyptus globulus timber     

Mohammad Derikvand  Nathan Kotlarewski  Michael Lee  Hui Jiao  Gregory Nolan 《Wood material science & engineering》2020,15(3):172-181

ABSTRACT

The main goal of this study was to investigate the visual characteristics, recovery rate, and flexural properties of sawn boards from a fibre-managed plantation Eucalyptus globulus resource as a potential raw material for structural building applications. The impacts of the visual characteristics, strength-reducing features, and variation in basic density and moisture content on the bending modulus of elasticity (MOE) and modulus of rupture (MOR) of the boards were investigated. The reliabilities of different non-destructive methods in predicting MOE and MOR of the boards were evaluated, including log acoustic wave velocity measurement and numerical modellings. The MOE and MOR of the boards were significantly affected by the slope of grain, percentage of clear wood, and total number of knots in the loading zone of the boards. The normal variation in basic density significantly influenced the MOE of the boards while its effect on the MOR was insignificant. The numerical models developed using the artificial neural network (ANN) showed better accuracies in predicting the MOE and MOR of the boards than traditional multi-regression modelling and log acoustic wave velocity measurement. The ANN models developed in this study showed more than 78.5% and 79.9% success in predicting the adjusted MOE and MOR of the boards, respectively.  相似文献   

Effect of pre-sowing treatments on germination and initial seedling development of Albizia saman in the nursery     

Mohammed Alamgir M．K．Hossain 《林业研究》2005,16(3):200-204

Albizia saman （Jacq.） F. Muell. commonly known as rain tree seeds were treated with five pre-sowing treatments to study the effect of pre-sowing treatments on germination and initial seedling development in the nursery.The experiment was established in the nursery of the Institute of Forestry and Environmental Sciences.University of Chittagong, Chittagong, Bangladesh. Results revealed that Nail clipping in one side of the seed （at the distal end of the seed） （T4） provides the highest （50%） seed germination. The second highest germination （42%） was obtained for the seeds treated with immersion in cold water for 24 h （T1）. Germination was completely inhibited when the seeds immersed in boiled water for 30 s followed in cold water soaking for 24 h. Other germination parameter and initial morphological growth and biomass production of the seedlings was also higher for the treatments T4and Ti in comparison to the control （Ta）treatment. Pre-sowing treatments of T4 e.g. Nail clipping in one side of the seed （at the distal end of the seed） and T1 （Seeds immersed in cold water for 24 h） may be recommended for maximum germination and initial vigorous seedlings growth of Albizia sarnan in the nursery.  相似文献   

孟加拉国丘陵地带桔园和灌木林地土壤物理性质的比较评价(英文)     

Mohammad Shaheed Hossain Chowdhury  Md. Abdul Halim  Shampa Biswas  S. M. Sirajul Haque  Nur Muhammed  Masao Koike Assistant Commissioner  Magistrate  Office of the Deputy Commissioner  Jamalpur-  Bangladesh M. Sc. student in Mountain Forestry  University of Natural Resources  Applied Life Sciences-BOKU  Vienna  Austria Professor 《林业研究》2007,(3)

对孟加拉国丘陵地带Mro部落经营的桔园与灌木林35%和55%两种坡地土壤物理性质进行了比较与评价。每一块用地内挖掘3个土壤剖面采集不同深度(0-5cm,5-15cm and 15-30cm)的土壤样品,测定土壤水分、有机质含量和土壤密度。最大持水量、田间持水量、干或湿土壤容重和土壤孔隙度的测定仅限于表层土壤。两种坡地桔园3个深度的土壤水分含量均显著高于灌木林地相同深度的土壤水分。桔园在55%坡地内土壤有机质含量低于林地含量值,而在35%坡地内的含量值则高于林地值。两块样地内上述两项测定值均在表层土壤中最高,且随土层深度的增加而降低。与灌木林地比较,桔园地表层土壤最大持水量、孔隙度和3个不同深度的土壤密度均较低。两块用地内不同坡地的表层土田间持水量有所差异,且桔园地干或湿表层土壤容重高于林地内的数值。表5参23。  相似文献