Antimicrobial and cytotoxic constituents of Loranthus globosus   总被引：2，自引：0，他引：2  

Sadik G  Islam R  Rahman MM  Khondkar P  Rashid MA  Sarker SD 《Fitoterapia》2003,74(3):308-311

(+)-Catechin, 3,4-dimethoxycinnamyl alcohol and 3,4,5-trimethoxycinnamyl alcohol were isolated from the barks of Loranthus globosus. All compounds showed significant antimicrobial and cytotoxic activities.  相似文献   

树木-水稻农林系统中害虫的侵害     

K. K. Islam G. M. M. Rahman A. T. M. Rafiqul Hoque 《林业研究》2006,17(1):44-46

本文比较研究了10种水稻害虫在3个树种(Akashmoni,Jhau和Albida)与稻子混栽的农-林复合生态系统中的发生情况,通过3个树种的冠幅大小、透光率以及害虫发生程度相比较,提出农-林复合生态系统中,水稻害虫的发生与树冠的透光率呈密切的负相关关系。  相似文献   

Structural identification of anthocyanins and analysis of concentrations during growth and flowering in buckwheat (Fagopyrum esculentum Moench) petals     

Suzuki T  Kim SJ  Mohamed ZI  Mukasa Y  Takigawa S  Matsuura-Endo C  Yamauchi H  Hashimoto N  Noda T  Saito T 《Journal of agricultural and food chemistry》2007,55(23):9571-9575

The anthocyanin profiles and variety/breeding-line differences of anthocyanin concentrations in petals of common buckwheat flowers have been studied. Four anthocyanins, cyanidin 3-O-glucoside, cyanidin 3-O-rutinoside, cyanidin 3-O-rhamnoside, and cyanidin 3-O-galactosyl-rhamnoside were isolated from the petals of common buckwheat (Fagopyrum esculentum Moench), separated using high performance liquid chromatography and identified using reversed-phase liquid chromatography-electrospray ionization-tandem mass spectrometry techniques. In every variety/breeding line tested, cyanidin 3-O-rutinoside was detected as the major anthocyanin and the next is cyanidin 3-O-glucoside whereas cyanidin 3-O-rhamnoside and cyanidin 3-O-galactosyl-rhamnoside were trace or not detectable in white and pink flowered buckwheat. Of all the varieties/breeding lines tested, Gan-Chao, a Chinese variety, contained the highest amount of anthocyanins. The largest part of cyanidin moiety was presented as a proanthocyanidin form (PAs-Cy). Anthocyanins and PAs-Cy in petals were increased along with increase of flower development stages. Therefore, fully developed petals of red flowered buckwheat, especially Gan-Chao, are promising as a new anthocyanin-rich material for food processing.  相似文献   

Economic contribution of participatory agroforestry program to poverty alleviation: a case from Sal forests, Bangladesh   总被引：2，自引：0，他引：2  

K. K. Islam  Marjanke Hoogstra  M.O. Ullah  Noriko Sato 《林业研究》2012,23(2):323-332

In the Forest Department of Bangladesh, a Participatory Agroforestry Program (PAP) was initiated at a denuded Sal forests area to protect the forest resources and to alleviate poverty amongst the local poor population. We explored whether the PAP reduced poverty and what factors might be responsible for poverty alleviation. We used three poverty measurement methods: the Head Count Index, the Poverty Gap Index and the Foster-Greer-Thorbecke index to determine the extent poverty reduction. We used a linear regression model to determine the possible differences among factors in poverty reduction. Data were collected through semi-structured questionnaires and face to face interviews within the study area. PAP proved effective at poverty alleviation, considerably improving the local situation. The linear regression model showed that PAP output explained the income differences in poverty reduction. Participants identified bureaucracy and illegal money demands by forest department officials, an uncontrolled market system, and underdeveloped road infrastructure as the main obstacles to reduction of poverty. Overall, PAP is quite successful in alleviating poverty. So this program might be ofinterest at other degraded forest areas as a tool to alleviate poverty.  相似文献   

Non-escaping frost tolerant QTL linked genetic loci at reproductive stage in six wheat DH populations     

Jingjuan Zhang  MD Shahidul Islam  Yun Zhao  Masood Anwar  Zaid Alhabbar  Maoyun She  Rongchang Yang  Angela Juhasz  Guixiang Tang  Jiansheng Chen  Hang Liu  Yanjie Jiang  Shengnan Zhai  Xin Hu  Junkang Rong  Yingquan Zhang  Yebo Qin  Qier Liu  Zitong Yu  Yujuan Zhang  Sadegh Balotf  Mirza Dowla  Sonia Afrin  Nandita Roy  Md Resad Mallik  Md Atik Us Saieed  Shanjida Rahman  Nigarin Sultana  Sarah Al-Sheikh Ahmed  Chris Florides  Kefei Chen  Darshan Sharma  Nathan Height  Ben Biddulph  Meiqin Lu  Jorge EMayer  Wujun Ma 《作物学报(英文版)》2022,(1):147-165

Reproductive stage frost poses a major constraint for wheat production in countries such as Australia.However,little progress has been made in identifying key genes to overcome the constraint.In the present study,a severe frost event hit two large-scale field trials consisting of six doubled haploid(DH)wheat populations at reproductive stage(young microspore stage)in Western Australia,leading to the identification of 30 robust frost QTL on 17 chromosomes.The major 18 QTL with the phenotype variation over 9.5%were located on 13 chromosomes including 2 A,2 B,2 D,3 A,4 A,4 B,4 D,5 A,5 D,6 D,7 A,7 B and7 D.Most frost QTL were closely linked to the QTL of anthesis,maturity,Zadok stages as well as linked to anthesis related genes.Out of those,six QTL were repetitively detected on the homologous regions on 2 B,4 B,4 D,5 A,5 D,7 A in more than two populations.Results showed that the frost damage is associated with alleles of Vrn-A1 a,Vrn-D1 a,Rht-B1 b,Rht-D1 b,and the high copy number of Ppd-B1.However,anthesis QTL and anthesis related genes of Vrn-B1 a and Ta FT3-1 B on chromosomes 5 B and 1 B did not lead to frost damage,indicating that these early-flowering phenotype related genes are compatible with frost tolerance and thus can be utilised in breeding.Our results also indicate that wild-type alleles Rht-B1 a and Rht-D1 a can be used when breeding for frost-tolerant varieties without delaying flowering time.  相似文献   

A study of phosphate adsorption by four Bangladesh soils     

Mesbahul Karim  Farrukh Ahmed  Aminul Islam 《Geoderma》1973,9(3):221-227

The adsorption curves for four soils were divided into segments I, II and III. Segment I ($\text{< 2}\text{μg P/ml equil. concn.}$) and segment II (2–150 μg P/ml equil. concentr.) conformed to the Langmuir equation similar to that of pure materials like gibbsite, pseudoboehmite and kaolinite, whereas segment III $\text{(> 75–150 μ}\text{g P/ml equil. concn.}\text{)}$ conformed to the Freundlich equation and was unlike the previous finding of linear relationship for pure materials.  相似文献   

Polyculture of Thai pangus (Pangasius hypophthalmus,Sauvage 1878) with carps and prawn: a new approach in polyculture technology regarding growth performance and economic return     

Md Sherazul Islam  Khandaker Anisul Huq  Md Anisur Rahman 《Aquaculture Research》2008,39(15):1620-1627

An experiment was conducted during May to December 2002 to determine growth performance, the highest economic return and suitable species composition in the polyculture of Thai pangus (Pangasius hypophthalmus) with carps (catla, Catla catla and rohu, Labeo rohita) and freshwater giant prawn (Macrobrachium rosenbergii) using low‐cost formulated feed. Three treatments (T₁, T₂ and T₃) were conducted with three replications. The treatment T₁ was designed as a monoculture of pangus with a stocking density of 17 500 individual ha^?1. The other two treatments (T₂ and T₃) were designed as polyculture and stocked with pangus, catla, rohu and prawn with densities of 10 000, 2500, 5000, 3750 ha^?1; and 10 000, 5000, 2500, 3750 ha^?1 in T₂ and T₃ respectively. The net weight gain and production of pangus were significantly different (P>0.05) between monoculture and polyculture but were not different within the two polyculture systems. The production of catla and rohu were significantly different (P>0.05) in both treatments where prawn was not. Though the gross production (8.53 ton ha^?1) was significantly (P>0.05) higher in T₁, the higher gross net profit (Tk 154 201 ha^?1) was in T₂. Thus, the polyculture of pangus is more profitable than its monoculture and the species composition in T₂ is more suitable than other composition.  相似文献   

The effect of selenium and vitamin E on the lymphocytes and immunoglobulin-containing plasma cells in the lymphoid organ and mucosa-associated lymphatic tissues of broiler chickens     

Khan MZ  Akter SH  Islam MN  Karim MR  Islam MR  Kon Y 《Anatomia, histologia, embryologia》2008,37(1):52-59

The present research has been designed to understand the effect of selenium and vitamin E on the lymphocyte and changes in the frequency of Ig-containing plasma cells in the lymphatic organ and ileum (representative organ for mucosa-associated lymphatic tissues) of different postnatal stages of Kasilla broiler chickens. A routine haematoxylin and eosin (H and E) stain were used to study the histology of the lymphocytic changes, and indirect immunoperoxidase staining method was performed for the study of the distributional and dynamical changes of the Ig-containing plasma cells within the lymphatic tissues and in the ileum of control broilers and in the broilers supplemented with different concentration of selenium and vitamin E in the diet. Histologically, the population of lymphocytes decreased in the lobules of the thymus, medulla of bursal follicles, splenic masses, lymphatic nodules of the cecal tonsil, and villi of the ilium in 0.1 mg and 0.5 mg selenium supplemented broilers in comparison with the control. The population of these cells was found to increase in 150 mg and 300 mg vitamin E supplemented chickens in the present study. In the spleen IgG- and the IgM-containing plasma cells were more than IgA-containing plasma cells. In contrast, in the cecal tonsil and ileum IgA-containing plasma cells were more than IgG- and IgM-containing plasma cells. The frequency of these immunopositive cells were decreased in 0.1 mg and 0.5 mg selenium supplementated chickens, and increased their frequency in the chickens supplemented with 150 mg and 300 mg vitamin E. In the spleen the frequency of IgM-containing plasma cells and both in the cecal tonsil and ileum, the IgG-containing plasma cells were more decreased by selenium supplementation which restored in their population by vitamin E supplementation.  相似文献   

Hydatid disease in goats in Bangladesh     

A.W.M. Shamsul Islam 《Veterinary parasitology》1980,7(2):103-107

A total of 12 344 goats of different ages from various localities of Bangladesh were examined for the presence of hydatid disease and 1024 (8.29%) were found to be infected. The incidence of infection by organ was: liver 36.72%, lungs 32.03%, spleen 4.69%, heart 3.13%, kidney 1.56%, omentum 0.78%, and both liver and lungs 21.09%. The severity of infection was: weak (84.56% and 86.55%), medium (13.32% and 11.87%) and heavy (2.12 and 1.58%) in the liver and lungs respectively. Of the 1792 cysts examined, 175 (9.76%) were fertile, 1342 (74.89%) were sterile, 206 (11.50%) were calcified, 47 (2.62%) were supporative and 22 (1.23%) were undeveloped. The incidence of infection by age of host was: 0.63% between 0 and 1 year, 2.48% between 1 and 2 years, 5.53% between 2 and 3 years, 16.80% between 3 and 5 years and 21.64% for 5 years old and above.  相似文献   

Molecular and antigenic characterization of Bangladeshi isolates of infectious bursal disease virus demonstrate their similarities with recent European, Asian and African very virulent strains     

Islam MR  Zierenberg K  Eterradossi N  Toquin D  Rivallan G  Müller H 《Journal of veterinary medicine. B, Infectious diseases and veterinary public health》2001,48(3):211-221

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