Lifestyle related causes of cancer and chemoprevention through phytonutrients     

Haque N  Salma U  Nurunnabi TR  Haque AK  Mukti IJ  Pervin S  Nahar R 《Pakistan journal of biological sciences: PJBS》2010,13(19):916-926

Cancer is a leading cause of death worldwide. There are a lot of cancer causing agents which are divided as physical carcinogens, chemical carcinogens and biological carcinogens. But most of the carcinogens or causes of cancer are related to our lifestyle like diet, habit, occupation, radiation and some infection, etc. Chemoprevention is highly necessary to prevent cancer related preterm death. For this besides avoiding the causes of cancer we should concentrate ourselves on our diet. Because, numerous phytochemicals derived from edible plants have been reported to interfere with a specific stage of the carcinogenic process. Many mechanisms have been shown to account for the anticarcinogenic actions of dietary constituents and recently attention has been focused on intracellular-signalling cascades as common molecular targets for various chemopreventive phytochemicals. In this study, we tried to describe lifestyle related causes of cancer and the molecular basis of cancer prevention through the phytochemicals.  相似文献   

孟加拉国库克斯巴扎(Cox's Bazar)和兰加马蒂(Rangamati)地区森林区和采伐区土壤属性比较   总被引：1，自引：0，他引：1  

M.A. Zaman  K.T. Osman  S. M. Sirajul Haque 《林业研究》2010,21(3):319-322

比较了天然林和森林采伐区土壤理化性质,评价了森林采伐对土壤的影响。采集了自然林和邻近的采伐林地三个土层（表层、中层和底层）土壤,对其属性进行了调查。森林土壤颗粒大小分布无显著变化。森林表层土和中层土体积密度存在显著差异。林地内表层土和中层土壤pH、表层土有机质和中层土有效磷均显著高于采伐林地的值。两块林地内可交换Na＋和阳离子交换能力没有变化。这些结果表明,两块林地内表层和亚表层土壤变化较明显。森林采伐降低土壤理化性质。  相似文献   

Phytophthora alni on Alnus glutinosa reported for the first time in Spain     

A. Solla  A. Pérez‐Sierra  T. Corcobado  M. M. Haque  J. J. Diez  T. Jung 《Plant pathology》2010,59(4):798-798

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Intermittent drainage in paddy soil: ecosystem carbon budget and global warming potential     

Md. Mozammel Haque  Jatish Chandra Biswas  Sang Yoon Kim  Pil Joo Kim 《Paddy and Water Environment》2017,15(2):403-411

Intermittent drainage of rice fields alters soil redox potential and contributes to the reduction of CH₄ emission and thus may reduce net global warming potential (GWP) during rice cultivation. Incorporation of green biomass helps maintaining soil organic matter, but may increase CH₄ emission. We investigated net ecosystem carbon budget (NECB) and net GWP under two water management regimes—continuous flooding and intermittent drainage—having four biomass incorporation levels (0, 3, 6 and 12 Mg ha^?1). Water management and biomass incorporation level demonstrated significant (P < 0.05) interaction effect on the NECB and GWP. Intermittent drainage decreased the NECB by ca. 6–46 % than continuous flooding under same rates of cover crop biomass (CCB) incorporation. Moreover, intermittent drainage reduced seasonal CH₄–C fluxes by ca. 54–58 % and net GWP by 35–58 % compared to continuous flooding. There was also no significant reduction in rice yield because of intermittent drainage under similar CCB. This implies that incorporation of 3 Mg ha^?1 CCB and intermittent drainage could be a good option for reducing net GWP and higher grain yield.  相似文献   

Binding of bis(p-chlorophenyl) acetic acid with bovine serum albumin     

R. Haque  J. Deagen  F.J. Biros  R.T. Ross 《Pesticide biochemistry and physiology》1976,6(2):170-174

The binding of bis(p-chlorophenyl) acetic acid with bovine serum albumin has been monitored by observing the changes in the relaxation times of bis(p-chlorophenyl) acetic acid proton magnetic resonance peaks. The addition of bovine serum albumin to an aqueous solution of bis(p-chlorophenyl) acetic acid increased linewidths in a manner suggesting rapid, reversible binding. Line broadening was found to be greater for the ring protons than for the benzylic proton, indicating that the ring presents the stronger binding site. The equilibrium constant has been approximated. The binding results are discussed in terms of environmental and toxicological considerations.  相似文献   

Deforestation effects on biological and other important soil properties in an upland watershed of Bangladesh     

S.M. Sirajul Haque  Sanatan Das Gupta  Sohag Miah 《林业研究》2014,25(4):877-885

Deforestation occurs at an alarming rate in upland watersheds of Bangladesh and has many detrimental effects on the environment. This study reports the effects of deforestation on soil biological properties along with some important physicochemical parameters of a southern upland watershed in Bangladesh. Soils were sampled at 4 paired sites, each pair representing a deforested site and a forested site, and having similar topographical characteristics. Significantly fewer(p≤0.001) fungi and bacteria, and lower microbial respiration, active microbial biomass, metabolic and microbial quotients were found in soils of the deforested sites. Soil physical properties such as moisture content, water holding capacity, and chemical properties such as organic matter, total N, available P and EC were also lower in deforested soils. Bulk density and pH were significantly higher in deforested soils. Available Ca and Mg were inconsistent between the two land uses at all the paired sites. Reduced abundance and biomass of soil mesofauna were recorded in deforested soils. However, soil anecic species were more abundant in deforested soils than epigeic and endogeic species, which were more abundant in forested soils than on deforested sites.  相似文献   

Role of PhoP–PhoQ two-component system in pellicle formation, virulence and survival in harsh environments of Dickeya dadantii 3937     

Md Manjurul Haque  Hisae Hirata  Shinji Tsuyumu 《Journal of General Plant Pathology》2012,78(3):176-189

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Effects of afforestation on ammonification and nitrification rates in former agricultural soils     

S.M.S. Haque  M.F. Billett  S. Grayston  B.G. Ord 《Soil Use and Management》1999,15(2):117-122

Abstract. The effects of afforestation on potential nitrification, nitrification and ammonification rates were studied at an experimental site in NE Scotland 4½ years after afforestation of former arable land. The site had been planted with three tree species (Sitka spruce, sycamore and hybrid larch) at three different planting densities, with half the plots treated with inorganic NPK fertilizer. Laboratory measurements of potential nitrification, nitrification and ammonification rates, measured using a perfusion system, were compared between the unforested control and combinations of the various treatments. Differences in soil pH and soil moisture content were also investigated.
Potential nitrification rates measured in plantation soils were significantly lower than in the unplanted control soil. Nitrification and ammonification rates were also consistently lower, although these differences were only significant in a few of the treatments. Soils planted with a normal tree density had a tendency to show higher nitrification rates compared to soils planted with a high tree density.
The results suggest that afforestation of former agricultural soils may cause changes in important parts of the soil N cycle soon after planting. At this early stage in the life of the plantation this appears to be unrelated to changes in soil pH or moisture content, even though soils beneath the trees are drier. The apparent change may be the result of differences in the soil microbial community associated with the type of organic matter substrate present in the unplanted and planted soils.  相似文献   

Brassica coenospecies: a rich reservoir for genetic resistance to leaf spot caused by Alternaria brassicae     

Girish Sharma  V. Dinesh Kumar  A. Haque  S.R. Bhat  Shyam Prakash  V.L. Chopra 《Euphytica》2002,125(3):411-417

Development of leaf spot resistant mustard cultivars is a relevant objective in view of heavy crop losses caused by this pathogen. Thirty-eight species belonging to 9 genera, including cultivated and wild allies, of the genus Brassica were evaluated under epiphytotic conditions for two years. Inoculations were done on whole plants (in vivo) and on detached leaves (in vitro). Data on incubation period, number of lesions per leaf, lesion size and leaf area covered by lesions were recorded. Species which never produced disease symptoms throughout the growing period in pots and until 72 hours after inoculation in detached leaf assays during both years were treated as resistant, while those that produced symptoms were classified as moderately resistant, susceptible or highly susceptible depending upon incubation period, size of lesions and leaf area covered by disease symptoms. Eight species (Brassica desnottesii, Camelina sativa, Coincya pseuderucastrum, Diplotaxis berthautii, D. catholica, D. cretacea, D. erucoides, and Erucastrum gallicum) were found completely resistant, whereas others were classified as moderately resistant (12), susceptible (11) or highly susceptible (9). Since resistance is unavailable within the cultivated species, these 8 resistant wild species could be used as donor parents for introgressing resistance to leaf spot disease in Indian mustard. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

Binding of DDT to lecithin     

I J Tinsley  R Haque  D Schmedding 《Science (New York, N.Y.)》1971,174(5):145-147

An interaction between DDT and lecithin is indicated by the reciprocal effects of each compound on the proton magnetic resonance spectrum of the other. The phosphoryl choline moiety of the lecithin and the benzylic proton of the DDT seem to be involved. The most pronounced response in the proton magnetic resonance spectrum of the lecithin produced by increasing concentration s of DDT was a change in the chemical shift of the resonance peak due to the protons of the choline methyl groups. Increasing concentrations of lecithin produced changes in the chemical shift of the resonance peaks of the benzylic proton and adjacent ring protons of the DDT. Equilibrium constant of 0.597 +/-0.015 molal(-1) was obtained for this interaction.  相似文献