http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Patel Arvind Kumar (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Patel Priya,Singh Shailesh,Patel Arvind Kumar,Kumar Bhupendra,Singh Arvind Kumar,Kumar Dinesh 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.2
Parthenium hysterophorus L. (Asteraceae) is a toxic weed of agricultural farms, pastures and wastelands with a pan-tropical distribution. The weed causes a reduction in crop production of agricultural fields and severe health problems in humans. The Mexican beetle, Zygogramma bicolorata Pallister (Coleoptera: Chrysomelidae) is among the most promising candidates for the weed biocontrol. However, no previous study has evaluated assimilation of nutrients in this beetle. In the present study, feeding attributes and assimilation of nutrients by larvae of Z. bicolorata were assessed on the weed. Results revealed that the first larval instars of Z. bicolorata exhibited lowest consumption rates, and accumulated minimum concentrations of glucose, proteins and triglycerides in their body. They showed compensatory feeding, and displayed highest food utilization efficiencies and developmental rates. In contrast, the fourth larval instars exhibited higher food consumption rates and conversion efficiencies, but displayed lowest developmental rates. Accumulation of food reserves was also recorded maximum for the fourth larval instars. Overall, the findings may aid current mass-rearing efforts for Z. bicolorata in laboratories, but field trials are still needed to strengthen the present findings.
-
Mayank Patel,Akash Aggarwal,Arvind Kumar 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.8
The processing of high-strength Al7075 alloy through the laser powder bed fusion process is challenging because of crackingsusceptibility. In this work, an experimental study has been carried out to understand the defects formation and to predict theoptimum conditions for defect-free parts by varying process parameters such as laser power, scanning speed, base-plate heatingtemperature, remelting speed, and powder composition. A detailed mechanical and microstructural characterization hasbeen carried out to investigate porosities, cracks, microstructure, grain structure, and mechanical properties. It was observedthat the single-melting-based fabrication of Al7075 samples results in excessive porosities and solidification cracks alongthe build direction. The cracks are due to the insufficient liquid back-filling of the long columnar-dendritic grains during thesolidification. The ramped-down high-speed remelting eliminates the balling defect, decreases the porosity percentage, andreduces surface roughness. The base plate heating of 473 K and 573 K reduces the extent of porosity and crack formation. Adding 4 wt% nano-TiC reinforcement to the Al7075 matrix eliminates the porosity and solidification cracks due to the veryfine equiaxed grain because of heterogeneous nucleation.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
