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( Kamal ),( Ahmed ),( Anver Basha Shaik ),( C. Ganesh Kumar ),( Poornima Mongolla ),( P. Usha Rani ),( K. V. S ),( Rama Krishna ),( Suman Kumar Mamidyala ),( Joveeta Joseph ) 한국미생물 · 생명공학회 2012 Journal of microbiology and biotechnology Vol.22 No.1
In an ongoing survey of the bioactive potential of microorganisms from Ladakh, India, the culture medium of a bacterial strain of a new Pseudomonas sp., strain ICTB-745, isolated from an alkaline soil sample collected from Leh, Ladakh, India, was found to contain metabolites that exhibited broad-spectrum antimicrobial and biosurfactant activities. Bioactivity-guided purification resulted in the isolation of four bioactive compounds. Their chemical structures were elucidated by 1H and 13C NMR, 2D-NMR (HMBC, HSQC, 1H,1H-COSY, and DEPT- 135), FT-IR, and mass spectroscopic methods, and were identified as 1-hydroxyphenazine, phenazine-1-carboxylic acid (PCA), rhamnolipid-1 (RL-1), and rhamnolipid-2 (RL-2). These metabolites exhibited various biological activities like antimicrobial and efficient cytotoxic potencies against different human tumor cell lines such as HeLa, HepG2, A549, and MDA MB 231. RL-1 and RL-2 exhibited a dose-dependent antifeedant activity against Spodoptera litura, producing about 82.06% and 73.66% antifeedant activity, whereas PCA showed a moderate antifeedant activity (63.67%) at 60 μg/cm2 area of castor leaf. Furthermore, PCA, RL-1, and RL-2 exhibited about 65%, 52%, and 47% mortality, respectively, against Rhyzopertha dominica at 20 μg/ml. This is the first report of rhamnolipids as antifeedant metabolites against Spodoptera litura and as insecticidal metabolites against Rhyzopertha dominica. The metabolites from Pseudomonas sp. strain ICTB-745 have interesting potential for use as a biopesticide in pest control programs.
Nominal flexural strength of high-strength concrete beams
Al-Kamal, Mustafa Kamal Techno-Press 2019 Advances in concrete construction Vol.7 No.1
The conventional ACI rectangular stress block is developed on the basis of normal-strength concrete column tests and it is still being used for the design of high-strength concrete members. Many research papers found in the literature indicate that the nominal strength of high-strength concrete members appears to be over-predicted by the ACI rectangular stress block. This is especially true for HSC columns. The general shape of the stress-strain curve of high-strength concrete becomes more likely as a triangle. A triangular stress block is, therefore, introduced in this paper. The proposed stress block is verified using a database which consists of 52 tested singly reinforced high-strength concrete beams having concrete strength above 55 MPa (8,000 psi). In addition, the proposed model is compared with models of various design codes and proposals of researchers found in the literature. The nominal flexural strengths computed using the proposed stress block are in a good agreement with the tested data as well as with that obtained from design codes models and proposals of researchers.
Nominal axial and flexural strengths of high-strength concrete columns
Mustafa Kamal Al-Kamal 사단법인 한국계산역학회 2019 Computers and Concrete, An International Journal Vol.24 No.1
The ACI building code is allowing for higher strength reinforcement and concrete compressive strengths. The nominal strength of high-strength concrete columns is over predicted by the current ACI 318 rectangular stress block and is increasingly unconservative as higher strength materials are used. Calibration of a rectangular stress block to address this condition leads to increased computational complexity. A triangular stress block, derived from the general shape of the stressstrain curve for high-strength concrete, provides a superior solution. The nominal flexural and axial strengths of 150 highstrength concrete columns tests are calculated using the proposed stress distribution and compared with the predicted strength using various design codes and proposals of other researchers. The proposed triangular stress model provides similar level of accuracy and conservativeness and is easily incorporated into current codes.
Kamal Kolasangiani,Mahmoud Shariati 한국강구조학회 2017 International Journal of Steel Structures Vol.17 No.2
In this research, ratcheting behavior of SS304L cylindrical shells under cyclic combined and uniaxial loadings was studied. Experimental tests were carried outby a servo-hydraulic INSTRON 8802 machine and the shells were fixed normal and oblique at angle of 20° with respect to the longitudinal direction of the shell. Force-control loadings were applied and the effect of length, angle of cylindrical shell and loading history on ratcheting behavior were examined.It was shown as the angle of cylindrical shell increases, due to increase of bending moment, accumulation of plastic deformation increases.Also, linear relation was observed between plastic energy and rate of plastic deformation which shows the rigidity of fixtures used in tests. Cutout effect on cylindrical shells under these kinds of loading has been studied and it was observed that creating cutout increases the plastic deformation and its rate.
Kamal, A.H.M.,Uddin, K.H.,Islam, M.M.,Mondal, M.M.H. Asian Australasian Association of Animal Productio 1996 Animal Bioscience Vol.9 No.5
The studies on the prevalence of ixodid ticks during July 1991 to June 1992 in five thanas of Chittagong hilly area in Bangladesh revealed that 65.45% cattle and 44.4% goats were infested with Boophilus microplus, Rhipicephalus appendiculatus and Haemaphysallis bispinosa. Aside these, only 4.62% cattle were found infested with Amblyomma sp. The tick infestation was highest in summer and declined gradually through rainy season to lowest in winter.
( Kamal Javanmard ),( Hamideh Namdar Mohammadi ) 세계문화관광학회 2016 International Journal of Culture and tourism Resea Vol.9 No.1
Media is a unique world in history of human civilization. There has never been such a fast change within history of human life because technology of communications not only has changed the world into a small village but also modernity waves have destroyed structures of societies and have created new insights and dimensions. In this direction, change of life style is considered as one of main indices of modernity. Life style forms personal identity, personality, attitude and approaches. The main objective of the present research is to recognize the effect and function of satellite channels on life styles of female students of Letters faculty of Islamic Azad University of Kerman. After testing hypotheses, it was found that there is a significant relationship between watching a Persian language satellite channel (GEM) and precocious puberty, kind of dressing, fidelity to beliefs, traditions and values. Also this channel affects considerably life style, identity and socio-cultural capital of students.
Cleanness of skew generalized power series rings
Kamal Paykan 대한수학회 2020 대한수학회보 Vol.57 No.6
A skew generalized power series ring $R[[S, \omega]]$ consists of all functions from a strictly ordered monoid $S$ to a ring $R$ whose support contains neither infinite descending chains nor infinite antichains, with pointwise addition, and with multiplication given by convolution twisted by an action $\omega$ of the monoid $S$ on the ring $R$. Special cases of the skew generalized power series ring construction are skew polynomial rings, skew Laurent polynomial rings, skew power series rings, skew Laurent series rings, skew monoid rings, skew group rings, skew Mal'cev-Neumann series rings, the ``untwisted" versions of all of these, and generalized power series rings. In this paper we obtain some necessary conditions on $R$, $S$ and $\omega$ such that the skew generalized power series ring $R[[S,\omega ]]$ is (uniquely) clean. As particular cases of our general results we obtain new theorems on skew Mal'cev-Neumann series rings, skew Laurent series rings, and generalized power series rings.
Proteomic Analysis of Stress Responses Protein in Wheat (Triticum aestivum L)
Kamal, Abu Hena Mostafa,Kim, Ki-Hyeon,Shin, Kwang-Hyun,Seo, Hyeong-Seok,Shin, Dong-Hoon,Hong, Lan-Seon,Park, Cheol-Soo,Jong, Young-Keun,Heo, Hwa-Young,Song, Beom-Heon,Lee, Chul-Won,Woo, Sun-Hee The Korean Society of Crop Science 2009 Korean journal of crop science Vol.54 No.1