نتایج جستجو برای: rock bolting

تعداد نتایج: 39317  

2000
Martin Zborovjan Igor Leššo Ľubomír Dorčák

Drilling into a rock massif is energetically extremely consumptive process. Hence the optimization of drilling regime with objective of energy consumption minimization, is very important. Proposed article discusses partial problem of this problem. During the drilling process it is useful to know the drilled rock type, whereas to particular drilled rock needs convenient drilling regime, which is...

2005
Weigang DUAN Shanzhi WANG Min CHEN Cuifen WANG Luyong ZHANG Jun LIU Lixin SUN

protein serine/threonine kinase (ROCK), is one of the central regulatory molecules for cytoskeleton control and cell adhesion process. ROCK also involves in other cell functions such as apoptosis and tumor invasiveness. Rho kinase is thought to play an important role in a variety of cellar functions such as stress fiber formation, focal adhesion formation, cell aggregation, cell morphology, cyt...

In this work, the effect of rock bolt angle on the shear behavior of Rock Bridges is investigated using the particle flow code in two dimensions (PFC2D) for three different Rock Bridge lengths. Firstly, the calibration of PF2D is performed to reproduce the gypsum sample. Then the numerical models with the dimensions of 100 mm * 100 mm are prepared. The Rock Bridge is created in the middle of th...

Journal: :The Plant Genome 2021

Genetic diversity is an important resource in crop breeding to improve cultivars with desirable traits. Selective can lead a reduction of genetic diversity. However, our understanding on this subject remains limited lettuce (Lactuca sativa L.). Genotyping-by-sequencing (GBS) provide reduced version the genome as cost-effective method identify variants across genome. We genotyped diverse set 441...

Journal: :Journal of the American Society for Horticultural Science 1996

2012
Phillip H. Larson Ronald I. Dorn

No prior research has documented the different types of rock coatings in Yosemite Valley, despite the evident black streaks down Yosemite Falls, the light granitic rock exposed by recent rock falls contrasting with dark rock coatings, and the millions of visitors who have photographed the coated rocks of Yosemite. This paper identifies the types of rock coatings found on Half Dome, in Yosemite ...

2003
A. F. C. Haldemann M. P. Golombek

Introduction: We have completed analysis of a new near-field rock count at the Mars Pathfinder landing site and determined that the previously published [1,2] rock count suggesting 16 % cumulative fractional area (CFA) covered by rocks is incorrect. The earlier value is not so much wrong (our new CFA is 20%), as right for the wrong reason: both the old and the new CFA’s are consistent with remo...

Journal: :journal of agricultural science and technology 0
e. shojaei department of biotechnology, bu-ali sina university, hamedan, islamic republic of iran. a. mirzaie-asl department of biotechnology, bu-ali sina university, hamedan, islamic republic of iran. s. b. mahmoudi sugar beet seed institute, agricultural research, education and extension organization (areeo) karaj, islamic republic of iran. s. nazeri department of biotechnology, bu-ali sina university, hamedan, islamic republic of iran.

transition from vegetative to reproductive growth is an important stage in plant’s life. flowering pathways including photoperiod, vernalization, gibberellins, and autonomous pathway are regulated by different genes. identification of flowering genes is essential for the development of bolting-resistant sugar beet cultivars. in this study, a set of 118 arabidopsis thaliana genes involved in flo...

Journal: :Journal of the Mining and Metallurgical Institute of Japan 1977

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