Boron-Calcium Synergically Alleviates Aluminum Toxicity in Wheat Plants (Triticum aestivum L.)     

A. K. M. Zakir Hossain  Md. Ali Asgar  M. Alamgir Hossain  Toshihiko Tosaki  Hiroyuki Koyama  Tetsuo Hara 《Soil Science and Plant Nutrition》2005,51(1):43-49

The effects of B and Ca treatments on root growth, nutrient localization and cell wall properties in wheat ( Triticum aestivum L.) plants with and without Al stress were investigated. Seedlings were grown hydroponically in a complete nutrient solution for 7 d and then treated with B (0, 40 μM), Ca (0, 2,500 μM), and Al (0, 100 μM) in a 500 μM CaCl₂ solution for 8 d. The cell wall materials (CWM) were extracted with a phenol: acetic acid: water (2:1:1 w/v/v) solution and used for subsequent pectin extraction with trans -1,2-diami-nocyclohexane- N,N,N,N -tetraacetic acid (CDTA) and Na₂CO₃ solutions. Boron, Ca, and B + Ca treatments enhanced root growth by 19.5, 15.2, and 27.2%, respectively, compared to the control (pH 4.5). Calcium and B+Ca treatments enhanced root growth with Al stress by 43 and 54%, respectively, while B did not exert any effect. The amounts of CWM and pectin per unit of root fresh weight increased by Al treatment, whereas the Ca and B+Ca treatments slightly reduced the contents of these components. Seventy-four percent of total B, 69% of total Ca, and 85% of total Al were located in the cell wall in the B, Ca, and Al treatments, respectively and 32% of total B, 33% of total Ca, and 33% of total Al were located in the CDTA-soluble and Na₂CO₃-soluble pectin fractions. A more conspicuous localization of B was observed in the presence of Al. Aluminum treatment markedly decreased the Ca content in the cell wall as well as pectin fractions, mainly in the case of the CDTA-soluble pectin fraction. Boron + Ca treatment decreased the Al content in the cell wall and pectin fractions compared to the Ca treatment alone in the presence of Al. It is concluded that the B+Ca treatment enhanced root growth and, B and Ca uptake, and helped to maintain a normal B and Ca metabolism in the cell walls even in the presence of Al.  相似文献   

Optimization of Compatible Mixed Cultures for Liquid State Bioconversion of Municipal Wastewater Sludge     

Alam  Md. Zahangir  Fakhru'l-Razi  A.  Abd-Aziz  Suraini  Molla  Abul H. 《Water, air, and soil pollution》2003,149(1-4):113-126

The filamentous fungal strains such as Penicillium corylophilum (P), Aspergillus niger (A), Trichoderma harzianum (T) and Phanerochaete chrysosporium (PC) isolated from its relevant sources (wastewater, sewage sludge and sludge cake) were selected for compatible/incompatible mixed cultures. Six combinations of P. corylophilum and A. niger (P/A); P. corylophilum and P. chrysosporium (P/PC); P. corylophilum and T. harzianum (P/T); A. niger and T. harzianum (A/T); A. niger and P. chrysosporium (A/PC); T. harzianum and P. chrysosporium (T/PC) were used to evaluate their potential performance as compatible/incompatible mixed culture for the treatment of municipal wastewater sludge in a bioconversion process. The results of the present study showed that the combinations of P/A, P/PC and A/PC showed compatible growth and the rest of the combinations (P/T, A/T and T/PC) were incompatible cultures. A maximum production of dry biomass and dry filter cake were recorded in the compatible mixed culture of P. corylophilum and A. niger (P/A). A maximum reduction of COD (90%) and a decreased filtration time of treated sludge was observed in the case of P/A microbial mixed culture. The pH value was also affected by the fungal cultures. Effective results were observed by using microbial mixed culture after four days of treatment compared to other treatments (2 and 6 days).  相似文献   

Extended glucuronidation is another major path of cyanidin 3-O-beta-D-glucopyranoside metabolism in rats     

Ichiyanagi T  Shida Y  Rahman MM  Hatano Y  Konishi T 《Journal of agricultural and food chemistry》2005,53(18):7312-7319

We previously determined that five rather hydrophobic metabolites appeared in blood plasma after oral administration of cyanidin 3-O-beta-D-glucopyranoside, but a group of hydrophilic metabolites still remained unidentified. In the present study, 12 hydrophilic metabolites found were collected from urine and plasma samples by high-performance liquid chromatography (HPLC) and then analyzed by tandem MS spectrometry. From the MS spectra, four metabolites out of 12 were assigned as glucuronides of cyanidin 3-O-beta-D-glucopyranoside and six out of 12 were glucuronides of the primary metabolites of cyanidin 3-O-beta-D-glucopyranoside (O-methyl cyanidin 3-O-beta-D-glucopyranoside). Extended glucuronides of cyanidin 3-O-beta-D-glucopyranoside and O-methyl cyanidin 3-O-beta-D-glucopyranoside showed their maximum plasma concentrations at 15 and 60 min (or 30 min) after oral administration, respectively. Their maximum plasma concentrations ranged from 15 to 70 nM. From the profile of urinary-excreted anthocyanins after intravenous administration, it was deduced that extended glucuronides of cyanidin 3-O-beta-D-glucopyranoside and O-methyl cyanidin 3-O-beta-D-glucopyranoside were mainly produced in the liver rather than by intestinal flora. The area under the plasma concentration curve was 0.25 micromol min/L for extended glucuronides of cyanidin 3-O-beta-D-glucopyranoside and 0.14 micromol min/L for O-methyl cyanidin 3-O-beta-D-glucopyranoside, respectively, when evaluated as cyanidin 3-O-beta-D-glucopyranoside equivalent, indicating that extended glucuronidation is a critical pathway in cyanidin 3-O-beta-D-glucopyranoside metabolism in rats.  相似文献   

Prevalence of larval taeniids in goats in Bangladesh     

Md. Jahurul Karim  Hefazuddin Shaikh  Md. Mozzammel Huq 《Tropical animal health and production》1982,14(3):166-166

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Effect of season and bacterial contamination on semen quality, freezability, and fertility of Hungarian Simmental artificial insemination bulls     

M A Ibrahim  H Abdel Rahman  B L Tóth  M Abdin 《Acta veterinaria Hungarica》1983,31(1-3):81-85

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Gastrointestinal Strongyloides in cattle: strategic treatment of grazing calves in early summer and following stabling     

H J Bürger  A Pfeiffer  M S Rahman 《Berliner und Münchener tier?rztliche Wochenschrift》1970,83(17):329-335

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Seasonal variations in the numbers of trichostrongylid nematode eggs and their larvae in the faeces of farmed goats in Malaysia.     

W A Rahman 《Veterinary parasitology》1992,42(1-2):163-166

Faecal worm egg counts of goats from two farms in Penang Island, West Malaysia, were monitored over a period of 14 months. The faecal egg count pattern followed that of total rainfall. The humid tropical environment was favourable for the development of various species of trichostrongylid nematodes, namely Haemonchus contortus, Trichostrongylus spp., Oesophagostomum spp. and Cooperia spp. Generally, H. contortus was observed to be the predominant species, more so in the monsoon months of the year.  相似文献   

Survey for drug-resistant trichostrongyle nematodes in ten commercial goat farms in west Malaysia     

Wahab A. Rahman 《Tropical animal health and production》1994,26(4):235-238

Summary The prevalence of drug-resistant parasites in goats in West Malaysia has rarely been reported. Ten commercial goat farms were surveyed for resistance to anthelminthics by measuring the reduction in faecal egg counts (FECs) after treatment with levamisole, pyrantel pamoate and fenbendazole. Resistance to fenbendazole was seen in most farms; there was no evidence of resistance to levamisole but some resistance to pyrantel pamoate was detected on one farm. The significance of the findings are discussed.

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Monitoreo Para Resistencia A Los Antihelminticos De Nematodos Trichoestrongiloides En Granjas Comerciales Caprinas En Malasia Occidental

Resumen Se ha informado pocas veces de la existencia de resistencia a los antihelmínticos en cabras en Malasia Occidental. Debido a esto, se monitorearon 10 granjas comerciales, midiendo la reducción en el conteo fecal de huevos después del tratamiento con levamisol, pamoato de pirantel y fenbendazol. La resistencia contra fenbendazol fue evidente en todas las granjas; no hubo evidencia de resistencia a levamisol, pero se encontró alguna resistencia a pamoato de pirantel en una de las granjas estudiadas. Se discuten el significado de estos hallazgos.

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Enquete Sur Des Nematodes Trichostrongles Resistant Aux Medicaments Chez Les Chevres De Dix Fermes Commerciales Dans L'Ouest De La Malaisie

Résumé La prévalence de parasites résistant aux médicaments chez des chèvres a rarement été rapportée en Malaisie. Une enquête a été réalisée sur les chèvres de dix élevages commerciaux pour déterminer la résistance aux anthelminthiques en mesurant la réduction du nombre d'oeufs dans les fèces après traitement avec du levamisole, du pamoate de pyrantel et du fenbendazole. Les animaux de la plupart des élevages ont montré une résistance au fenbendazole mais non au levamisole alors que ceux d'un élevage ont résisté à l'action du pamoate de pyrantel. Les raisons de ces observations sont discutées.

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Tsetse and trypanosomiasis survey of southern darfur province,Sudan     

M. J. R. Hall  S. M. Kheir  A. H. A. Rahman  S. Noga 《Tropical animal health and production》1983,15(4):191-206

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Corynebacterium equi in mastitis in a buffalo (Bubalus bubalis)   总被引：1，自引：0，他引：1  

H Rahman  K K Baxi 《The Veterinary record》1983,112(9):208-209

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