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排序方式: 共有274条查询结果,搜索用时 62 毫秒
271.
Shahram Shakiba Zadeh Che Roos Saad Annie Christianus Mohd Salleh Kamarudin Kamaruzaman Sijam Mariana Nor Shamsudin Vasantha Kumari Neela 《Aquaculture International》2010,18(6):1017-1026
To conquer disease problem in shrimp industries, probiotic biocontrol is a well-known remedy now. The antagonistic ability
of separated isolates from different parts of juvenile P. monodon was screened against shrimp Vibrio pathogens, V. parahaemolyticus and V. alginolyticus. The most antagonistic effect was observed for an isolate that primarily identified as Shewanella algae using conventional method followed by Biolog GN and GP microplates. Since adaptability to the host optimum cultural condition
of the target organism is of the great importance, response surface methodology, with central composite design, was applied
to assess log cell count response of S. algae in different incubation conditions. Therefore, four independent variables were assumed as: temperature (10–50°C), pH (6–10),
NaCl concentration (0–50‰) and time (12–60 h). The coefficients of multiple determinations (R
2) for the responses log cell count of S. algae being 0.827. Temperature was the merely significant independent variable that affected the log cell count of the candidate
probiotic. The candidate probiotic was revealed a reasonable growth response in quite wide range of temperature, pH and NaCl
concentration in which the maximum levels were in same range of optimum shrimp culture. 相似文献
272.
273.
Md. Saiful Islam Irmawati Binti Ramli M. R. Hasan Md. Moynul Islam Kh. Nurul Islam Mahbub Hasan Ahmad Saffian Harmaen 《Fibers and Polymers》2017,18(1):116-121
Kenaf/empty fruit bunch/polylactic acid (kenaf/EFB/PLA) hybrid biocomposites were prepared using hot press technique. The ratio of fiber to polylactic acid was set at 60:40 with 1:1 ratio between kenaf and empty fruit bunch fibers. Physical, mechanical and thermal properties of hybrid biocomposites were subsequently characterized using Fourier transform infrared spectroscopy, scanning electron microscope, X-ray diffraction, thermogravimetric analysis, differential scanning calorimetry, tensile and water absorption tests. Test results indicated that mechanically stronger fiber was able to support the weaker fiber. Hybrid fiber biocomposite had higher crystallinity as compared to single fiber biocomposite. Water absorption of hybrid composite was higher as compared to single fiber composite. Thermal result revealed that hybridization of fiber was not significantly influence the thermal properties of composites. However, the presence of two different fibers proposed good wettability properties, which could reduce the formation of voids at the fibers-polymer interface and produce composites with high stiffness and strength. 相似文献
274.
Wendy Chui Phing Lau Mohd Y. Rafii Mohd Razi Ismail Adam Puteh Mohammad Abdul Latif Ramli Asfaliza Gous Miah 《Euphytica》2017,213(1):11
Fragrance in rice is an appealing attribute to consumers. The increasing demand for fragrant rice highlights the need to develop fragrant rice variety that suit the preference of local consumers in addition to reduce fragrant rice imports. Marker-assisted backcrossing (MABC) was employed to develop advanced fragrant rice lines from the cross between MR269 and Basmati 370. MR269 is a Malaysian high-yielding rice variety but non-fragrant and was used as recurrent parent whereas Basmati 370 is a well-known fragrant traditional rice variety and was used as donor parent for the fragrance gene. Two generations of backcrosses and a generation of selfing were conducted to introgress the fragrance gene and restore the recurrent parent genome in the backcross progenies. As a result, 14 advanced fragrant rice lines were developed. These advanced fragrant rice lines carried homozygous alleles for the fragrance gene, similar to Basmati 370. The average recovery of recurrent parent genome was 88.4%. Besides being fragrant, the advanced fragrant rice lines also had most of the morphological and agronomical traits similar to MR269. Grain quality of the advanced fragrant rice lines in terms of gelatinization temperature, amylose content and gel consistency are also similar to both parents. Besides, the advanced fragrant rice lines had 2-acetyl-1-pyrroline content similar to Basmati 370. MABC approach applied in this study has successfully introgressed the fragrance gene and accelerated the recovery of recurrent parent genome in advanced fragrant rice lines, therefore these lines can be delivered to the farmers and consumers for use in due time. 相似文献