Anesthesia and acoustic stress-induced intra-uterine growth retardation in mice   总被引：2，自引：0，他引：2  

Haque SF  Izumi S  Aikawa H  Suzuki T  Matsubayashi H  Murano T  Kika G  Ikeda M  Goya K  Makino T 《The Journal of reproduction and development》2004,50(2):185-190

Stress interferes with reproduction, adversely influencing implantation and fetal growth, and sometimes even leading to abortion. Here, we attempted to evaluate the early gestational effects of uncomfortable sound on pregnant mice and their offspring. Ten-week-old pregnant Jcl:ICR mice were exposed to sound (100 dB, random frequency between 9-34 kHz) for 8 hours on the 3(rd), 5(th) and 7(th) gestational days (GD). The effects of general anesthesia were also investigated, with or without acoustic stress. All groups were examined on the 18(th) GD for fetal growth. Fetal weight, number of ossified sacrococcygeal vertebrae and placental weight were all significantly reduced (P<0.0001) when stress was induced on the 7(th) GD, but not on the 3(rd) or 5(th) GD. This intra-uterine growth retardation (IUGR) was significantly inhibited by general anesthesia (P<0.0001), although general anesthesia alone induced significant IUGR (P<0.0001) when compared with control mice. This suggests that acoustic exposure indirectly exerts an effect on fetal growth, possibly via a psycho-maternal pathway. We also found that analysis of the number of ossified sacrococcygeal vertebrae is the most sensitive tool for the study of IUGR.  相似文献   

Model fitting for visco-elastic creep of Pinus radiata during kiln drying     

M. N. Haque  T. A. G. Langrish  L.-B. Keep  R. B. Keey 《Wood Science and Technology》2000,34(5):447-457

This work examines the applicability of mathematical models for correlating the visco-elastic strains during kiln drying of radiata pine (Pinus radiata D. Don) sapwood at various temperatures and moisture contents. The eventual aim is to use a mathematical model incorporating these strains to optimise the drying schedules and minimise the degradation. Data sets from previous experiments (Keep 1998) obtained at temperatures from 20 to 140 °C for sapwood at 5, 15 and 20% moisture contents (dry basis) were analysed. The data were fitted for various theoretical models, namely the Maxwell, Kelvin and Burgers models, and the Bailey-Norton equation. The parameter values and standard errors for the above models over the range of experimental data have been determined. The results indicate that the Maxwell model did not fit the experimental data well, having only one parameter. In most cases, the Bailey-Norton equation was inadequate, as it is a power-law model with a predicted continuous increase in creep with time and does not predict a plateau in the creep strain, as has been observed for most of Keep's (1998) data. The Kelvin model gave a better fit than the Bailey-Norton equation for most of the data sets. From visual inspection of the plots for the experimental data and the model predictions with time, it was found that both the Kelvin and Burgers models fitted the data satisfactorily. However, the three-parameter Burgers model was not a significant improvement over the two-parameter Kelvin model at the 0.01 level of significance, as shown by an analysis of variance. Received 2 November 1998  相似文献   

Anti-anaphylactic effect of Euphorbia hirta     

Youssouf MS  Kaiser P  Tahir M  Singh GD  Singh S  Sharma VK  Satti NK  Haque SE  Johri RK 《Fitoterapia》2007,78(7-8):535-539

The Euphorbia hirta ethanolic extract (EH A001) was found to possess a prominent anti-anaphylactic activity. A preventive effect of EH-A001 given by oral route at dose from 100 to 1000 mg/kg was observed against compound 48/80-induced systemic anaphylaxis. At the same range of dose, EH-A001 inhibited passive cutaneous anaphylaxis (PCA) in rat and active paw anaphylaxis in mice. A suppressive effect of EH-A001 was observed on the release of TNF-alpha and IL-6 from anti-DNP-HSA activated rat peritoneal mast cells.  相似文献   

Tree assemblages and diversity patterns in Tropical Juri Forest,Bangladesh     

Swapan Kumar Sarker  Muhammad Nur-Un-Nabi  Md.Mohasinul Haque  Mahmuda Sharmin  Sanjay Saha Sonet  Sourav Das  Niamjit Das 《林业研究》2015,(1):159-169

Juri is a biodiversity-rich primary forest in Bangladesh, which remains ecologically unexplored. We identified tree species and examined the richness, alpha(a)diversity and floristic similarity patterns within the identified communities. Vegetation and environmental data were sampled in 120(0.04 ha) study plots. Tree communities were delimited by two-way indicator species analysis(TWINSPAN). In total, 78 tree species of 35 families and58 genera were identified. TWINSPAN identified six tree communities: A—Tricalysia singularis; B—Kydia calycina-Castanopsis tribuloides; C—Polyalthia simiarum-Duabanga grandiflora; D—Ficus roxburghii; E—Artocarpus lacucha; F—Artocarpus lacucha. Mean richness, Shannon and Gini-Simpson indices were highest for the Polyalthia simiarum-Duabanga grandiflora community, while Ficus roxburghii showed lowest diversity. Significant differences(p = 0.05) in three diversity indices were recorded between Polyalthia simiarum-Duabanga grandiflora and Ficus roxburghii. Tree compositional similarity was greatest between Kydia calycina-Castanopsis tribuloides and Polyalthia simiarum-Duabanga grandiflora(0.712).  相似文献   

Inheritacne of submergence tolerance in rice     

Q. A. Haque  D. Hille Ris Lambers  N. M. Tepora  Q. D. dela Cruz 《Euphytica》1989,41(3):247-251

Summary Inheritance of submergence tolerance in rice (Oryza sativa L.) was investigated in an 8×8 diallel cross. Duration to 50% mortality of the diallel populations (F₁'s + parents) under completely submerged conditions at the seedling stage was used to characterize submergence tolerance instead of the usual submergence survival percentages.A strong prepotency of parents was found in transmitting the character to their offspring. Additive and nonadditive gene effects were highly significant. Parents highly tolerant to submergence also had high gca effects, and F₁'s between two tolerant parents were found to be the most tolerant of the diallel combinations. A high narrow-sense heritability was also observed.The additive-dominance model was found valid for this diallel cross. Submergence tolerance was partially dominant over susceptibility and recessive alleles were more concentrated in the susceptible parents IR42 and IR11288-B-B-69-1.  相似文献   

Water quality of Kaptai reservoir in Chittagong Hill Tracts of Bangladesh   总被引：1，自引：0，他引：1  

Shyamal Karmakar  S. M. Sirajul Haque  M. Mozaffar Hossain  M. Shafiq 《林业研究》2011,21(1):87-92

A study was conducted in Kaptai reservoir, one of the largest man-made freshwater lakes of South-east Asia, to determine present status of water quality and its suitability for fishing and other uses. Water samplings were from middle part of the reservoir at 0.2 and 0.8 fractional depths at five different locations from upstream to downstream viz. Burburichara, Maichchari, Subolong, Basanthakum, and Rangamati. Water analyses show that concentrations of NO3-N, K+ and total P, and suspended solid at all the sampling stations were beyond the recommended values for fish culture. Concentrations of Na+, Ca2+, Mg2+, SO42-, Cl-, total dissolved solid (TDS), dissolved oxygen (DO) and chemical oxygen demand (COD) were within the standards for aquaculture. Concentrations of NO3-N, SO42-, K+ and total P showed no definite trend with depths, locations as well as rainy and dry seasons. Water pH, conductivity, Na+ and HCO3- contents were lower in rainy season, and DO and COD higher at almost all the locations in both the depths, compared with dry season. Total solids and concentrations of TDS, DO, COD, Ca2+, Mg2+ and Na+ were higher in upstream and decreased gradually towards downstream in the reservoir. Concentrations of DO and Ca2+ and pH were higher and Mg2+ less at 0.2-fractional depth than those at 0.8-fractional depth at almost all the locations. The reservoir is in mesotrophic condition containing high concentration of NO3-N and total P, in alarming status with the presence of excessive suspended solids from urban pollution around the town. It is necessary to adopt measures for protecting water quality in the reservoir due to such deteriorations.  相似文献   

Development and Validation of SCAR Markers Co-Segregating with an Agropyron Elongatum Derived Leaf Rust Resistance Gene Lr24 in Wheat   总被引：1，自引：0，他引：1  

S. K. Gupta  A. Charpe  S. Koul  Q. M. R. Haque  K. V. Prabhu 《Euphytica》2006,150(1-2):233-240

Summary An Agropyron elongatum-derived leaf rust resistance gene Lr24 located on chromosome 3DL of wheat was tagged with six random amplified polymorphic DNA (RAPD) markers which co-segregated with the gene. The markers were identified in homozygous resistant F₂ plants taken from a population segregating for leaf rust resistance generated from a cross between two near-isogenic lines (NILs) differing only for Lr24. Phenotyping was done by inoculating the plants with pathotype 77-5 of Puccinia triticina. To enable gene-specific selection, three RAPD markers (S1302₆₀₉, S1326₆₁₅ and OPAB-1₃₈₈) were successfully converted to polymorphic sequence characterized amplified region (SCAR) markers, amplifying only the critical DNA fragments co-segregating with Lr24. The SCAR markers were validated for specificity to the gene Lr24 in wheat NILs possessing Lr24 in 10 additional genetic backgrounds including the Thatcher NIL, but not to 43 Thatcher NILs possessing designated leaf rust resistance genes other than Lr24. This indicated the potential usefulness of these SCAR markers in marker assisted selection (MAS) and for pyramiding leaf rust resistance genes in wheat.  相似文献   

Genetic analysis of pod quality characteristics in vegetable cowpea (Vigna unguiculata L. Walp.)     

P. Umaharan  R.P. Ariyanayagam  S.Q. Haque 《Scientia Horticulturae》1997,70(4):281-292

A preliminary study of consumer preferences for pod characteristics in vegetable cowpea showed a general preference for greener, longer, fleshier pods that are less seedy. Methods of quantitatively assessing these traits were developed and used in understanding the inheritance of pod quality traits. Combining ability analysis, involving a 6 × 6 diallel mating design, showed that GCA effects were predominant for all pod characteristics. The additive effects were especially high for pod seediness. The dominance effect was, nevertheless, significant for all the characters. The dominance effects were unidirectional in the case of pod wall thickness and were in the direction of the thin walled parent. Dominance was ambidirectional for the other characteristics investigated. The study showed that it is relatively easy to improve these characters by carefully selecting the parents in hybridisation programmes.  相似文献   

Management of type 2 diabetes mellitus by lifestyle, diet and medicinal plants     

Haque N  Salma U  Nurunnabi TR  Uddin MJ  Jahangir MF  Islam SM  Kamruzzaman M 《Pakistan journal of biological sciences: PJBS》2011,14(1):13-24

Globally, the prevalence of chronic, noncommunicable diseases is increasing at an alarming rate and diabetes is one of them. If diabetes is not controlled then a lot of complication like coronary artery disease, cerebrovascular disease, peripheral vascular disease, retinopathy, nephropathy and neuropathy arise in diabetic patients and causes morbidity and/or mortality. Diabetes is increasing at an epidemic form and in near future the largest increases will take place in the regions dominated by developing economies. So, it will be a great social and economical burden to developing countries as well as the developed. But if we be aware about our diet and lifestyle and take proper medication we may prevent and reduce the prevalence of diabetes. Oral medicine plays an important role in management of diabetes. But most of the oral drugs are costly and have a lot of side effects. For this it is also necessary to take medicines with fewer or no side effects. And antidiabetic medicinal plants may play an important role in this case. In this article we have tried to describe how diet and lifestyle with using medicinal plants may help to prevent or maintain diabetes and help to reduce the mortality and morbidity due to diabetes or complication related to it.  相似文献   

Management strategy,uptake and translocation of nitrogen in tidal flooded rice ecosystem     

Md. Abdullah Al Mamun  M. Moynul Haque  M. Abu Saleque  Qazi Abdul Khaliq  A. J. M. Sirajul Karim  Md. Arifur Rahman Khan 《Journal of plant nutrition》2020,43(14):2186-2199

Abstract

Enhancing rice yield is a great challenge for rice growers in the tidal flooded ecosystem, where poor agronomic management is one of the major constrains. Improve management practice (IMP) was compared with traditional farmers’ practice (TFP) in evaluating rice productivity, nutrient uptake, translocation and farm income in tidal flooded ecosystem. Results revealed that, IMP significantly produced higher number of panicles m^?2, more grain panicle^?1 and better grain filling. The rice cultivars produced 2.0 to 2.5 t grain ha^?1 with TFP, while 3.0 to 4.0 t ha^?1 with IMP. In different rice cultivars, the grain yield in IMP increased 12 to 60% over TFP. Similarly, the grains in IMP treatment absorbed 21.41 to 57.03?kg N ha^?1 whereas only 15.85 to 46.94?kg N ha^?1 in TFP plot. However, higher nitrogen (N) transfer from shoot to grain in IMP also suggests that the amount of N in soil was too low to meet the plant demand in TFP. Although, the IMP involved additional cost, but it gave significantly higher gross return (438 to 954?US$ha^?1) and margin (397 to 913?US$ha^?1) which added farm income upto 225?US$ha^?1 over TFP. Hence, it could be concluded that IMP is a potential option for increasing grain yield and farm income during aman season in the tidal flooded ecosystem.  相似文献