Biological screening of Bangladeshi mango mistletoe bark extracts     

Islam R  Khurshid Alam AH  Hossain MA  Mosaddik MA  Sadik G 《Fitoterapia》2004,75(3-4):405-408

The ethyl acetate extract of the Bangladeshi mango mistletoe (Loranthus globosus) bark was found to be most effective against both Gram (+) and Gram (-) bacteria and it also showed good cytotoxicity with a LC50 10.83 microg/ml.  相似文献   

孟加拉国么偌(Mro)部落的房屋格局和饮食习性:一种依靠森林的观点(英文)     

Mohammad Shaheed Hossain Chowdhury  Md.Danesh Miah 《林业研究》2003,(3)

通过半探问的方式,采用不同的参与评估法对36户么偌人分3组进行了评估。么偌部落严重依赖森林资源,在房屋格局和饮食习性方面形成了特殊的本土文化。图2表2参31。  相似文献   

A water balance model to estimate groundwater recharge in Rechna doab,Pakistan     

Ghulam Zakir Hassan  Muhammad Nawaz Bhutta 《Irrigation and Drainage Systems》1996,10(4):297-317

The main objective of this study was to develop a procedure to evaluate various recharge components of a groundwater reservoir to estimate the long term average seasonal groundwater recharge in Rechna doab in the Punjab province of Pakistan. A regional lumped water balance model for the Rechna doab was developed and applied to estimate the long term a seasonal recharge to groundwater reservoir. For comparison, recharge was also estimated by a specific yield method from observed groundwater levels. A water balance study was conducted on seasonal basis (6 months) for a period of 31 years (1960–1990). Recharge estimated by the two methods was found to be in good agreement. The average value of net groundwater recharge during Kharif (April–September) season was found to be some 60 mm. No recharge occurred during Rabi (October–March), rather there was a depletion of the groundwater reservoir during the winter months. Long term average annual depletion of a groundwater reservoir was found to be greater than corresponding value of annual recharge. It was concluded that on a regional basis the groundwater reservoir was being depleted resulting in an average groundwater table of Rechna doab about 2.3 m fall over the 1960–1990 period.  相似文献   

Investigations into the causes of segregation of Ogura male sterility in Bangladeshi cultivars of radish     

M. A. Hossain    M. A. K. Mian    M. G. Rasul 《Plant Breeding》2002,121(4):354-356

In a series of three experiments during 1998‐99 and 1999‐2000 at Gazipur, Bangladesh, the causes of segregation of Ogura cytoplasmic genetic male sterility in local cultivars of radish were studied. Male‐sterile populations at the BC₅ and BC₆ generations were grown under a range of field temperatures for 2 years and the results on pollen fertility tests revealed that the expression of male sterility was not affected by temperature. Neither was a genotype‐year interaction found. The unexpected segregation observed in the male‐sterile backcross generations might be due to the presence of restorer alleles in the maintainer parents.  相似文献   

Selection in tetraploid rye. III. Frequency and performance of aneuploids     

M. Gul Hossain 《Euphytica》1978,27(1):137-143

Summary Aneuploidy was studied in populations selected for high seed-set with regular meiosis and low-seedset with irregular meiosis and an unselected population of the same origin. The frequency of aneuploids was significantly reduced in the high population that was characterised by increased bivalent frequency. In spite of a similar quadrivalent frequency in euploid plants of the low and the unselected population, the former population had a significantly higher frequency of aneuploids. However, there was no significant difference in the performance of aneuploid plants from the three populations. The results indicated that hyperaneuploid gametes were less functional than hypoaneuploid gametes but no significant difference was found in the performance of hypo- and hyperancuploids.  相似文献   

Effect of proteolytic squid protein hydrolysate on the state of water and dehydration-induced denaturation of lizard fish myofibrillar protein   总被引：1，自引：0，他引：1  

Hossain MA  Ishihara T  Hara K  Osatomi K  Ali Khan MA  Nozaki Y 《Journal of agricultural and food chemistry》2003,51(16):4769-4774

With the goal of preparing low-cost functional food, squid protein hydrolysate (SPH) was extracted from four squid species by protease treatment. Peptides are the major components (approximately 84-88%) of the SPH. The stabilization effects of 5% SPH (dried weight/wet weight) on the state of water and the denaturation of frozen lizard fish Saurida wanieso myofibrillar protein (Mf) were evaluated on the basis of desorption isotherm curves with respect to Ca2+-ATPase inactivation and the presence of unfrozen water, which was determined using differential scanning calorimetry during dehydration, and the effects were compared with those of sodium glutamate. The Mf with SPH was found to contain higher levels of monolayer and multilayer sorption water, resulting in decreased water activity and Ca2+-ATPase inactivation. The amount of unfrozen water in Mf with SPH increased significantly, suggesting that the peptides of SPH stabilized water molecules on the hydration sphere of Mf, which maintained the structural stability of Mf, and therefore suppressed dehydration-induced denaturation. The effect by SPH was less than that by sodium glutamate.  相似文献   

Methylene Blue Stainability of Root-Tip Protoplasts as an Indicator of Aluminum Tolerance in a Wide Range of Plant Species, Cultivars and Lines   总被引：2，自引：0，他引：2  

Tadao Wagatsuma  Md. Shahadat Hossain Khan  Idupulapati M. Rao  Peter Wenzl  Keitarou Tawaraya  Takanori Yamamoto  Takeshi Kawamura  Kazumi Hosogoe  Satoru Ishikawa 《Soil Science and Plant Nutrition》2005,51(7):991-998

We previously developed a new simple technique of methylene blue (MB) staining for the discrimination of aluminum (Al)-tolerant protoplasts from 4 plant species (rice, oats, maize and pea). The objectives of the present study were to confirm the applicability of this technique to a wider range of plant species, cultivars and lines, and to identify a common strategy for the early stage of Al tolerance. A total of 10 plant species, two Brachiaria spp., two Oryza spp., buckwheat, maize, pea, triticale, wheat and barley, corresponding to 18 different plant samples (species, cultivars, and lines), were used. Al tolerance (relative net root elongation of the longest root), which was screened at 20 μM AICI₃ in 0.2 mM CaCl₂ (pH 4.9) for 24 h, ranged widely from 10 to 88. Among cultivars and lines within the same species, Al accumulation in the root tip portion was higher in Al-sensitive plants, corresponding to more severe permeabilization of the plasma membranes (PM). Protoplasts isolated mainly from the epidermis, and outer and central parts of the cortex were stained to different degrees by MB, and the blue color was observed both on the surface and inside the protoplasts. Color pictures obtained after staining for 3 min with 0.1% MB were analyzed by Image Hyper II. The ratio of the heavily stained area at threshold 95 to the entire area stained with MB at threshold 125 was defined as MB stainability. MB stainability was negatively correlated with Al tolerance ( y = 48.6e^{−0.02 x} , R ²= 0.676**) suggesting the common importance of permeation characteristics of PM, in addition to PM negativity for Al tolerance in a wide range of plant species, cultivars and lines. Analysis of the PM lipid composition was proposed as an important topic for future studies on the negativity and permeation of PM.  相似文献   

Effects of day and night on swimming,grazing and social behaviours of rohu Labeo rohita (Hamilton) and common carp Cyprinus carpio (L.) in simulated ponds     

Mohammad Mustafizur Rahman  Marc Verdegem  Md Abdul Wahab  Md Yeamin Hossain  Qtae Jo 《Aquaculture Research》2008,39(13):1383-1392

Diel rhythmicity of grazing, swimming, resting and social interactions of rohu (Labeo rohita) (weight 66.5–68.3 g) and common carp (Cyprinus carpio) (79.9–82.0 g) were observed in 1 m² simulated ponds using video images. Fish behaviour was monitored during a full 24‐h period, starting at 08:00 hours with a 15‐min recording, which was repeated every 3 h. Rohu spent more time grazing during the day than at night. Grazing activity peaked at the beginning and at the end of the day. Grazing and resting of rohu were negatively correlated. Common carp grazed day and night, showing no distinct grazing peak. Considering the grazing time of rohu and common carp, a feeding schedule with two feeding times at 07:30 and 16:30 hours might be appropriate for better food intake and conversion in rohu–common carp polyculture system.  相似文献   

Water use — Yield relations for cowpea and maize     

H.O Fapohunda  P.O Aina  M.M Hossain 《Agricultural Water Management》1984,9(3):219-224

Three cowpea varieties and one maize variety were subjected to varying irrigation treatments, ranging from water deficits to over-irrigation, on a silty loam soil classified as an Alfisol at Ile-Ife, Nigeria. There was a strong curvilinear relation between cowpea yield and evapotranspiration (R² = 0.86 for dry matter yield and R² = 0.87 for dry seed yield). The values of the correlation coefficient dropped to 0.62 and 0.66 for dry matter and seed yields, respectively, when a linear relation was used. When data for over-irrigated fields were omitted from the calculation, a linear relationship yielded R² values close to unity (R² = 0.99). Similar results were obtained on maize dry matter and grain yields in relation to evaporation.  相似文献   

Genetic analysis of Lolium. I. Identification of linkage groups and the establishment of a genetic map   总被引：3，自引：0，他引：3  

M. D. Hayward    J. W. Forster    J. G. Jones    O. Dolstra    C. Evans    N. J. McAdam  K. G. Hossain    M. Stammers    J. Will    M. O. Humphreys  G. M. Evans 《Plant Breeding》1998,117(5):451-455

A genetic map of Lolium has been produced using isozyme, restriction fragment length polymorphism (RFLP) and random amplified polymorphic DNA (RAPD) markers applied to a segregating family derived from an F₁ hybrid plant of L. perenne × L. multiflorum provenance, crossed on to a doubled haploid L. perenne. A total of 106 markers, out of a total of 160 polymorphic loci analysed, have been ascribed to seven linkage groups covering a map distance of 692cM, Two of these groups may be allocated to chromosomes 2 and 6 of the Lolium genome. The remaining unallocated markers, the majority of which showed severe segregation distortion, could be associated into small groups of two or three markers which showed no linkage with the main groups at a LOD of 2.8 or, if associated, could not be mapped in a satisfactory manner. This high incidence of disturbed segregations could be accounted for by the use of an interspecific hybrid between two species of differing genome size, with consequent cytological imbalance.  相似文献