Three 2,4-dichlorophenoxyacetic acid (2,4-D) -resistant root callus tissue lines of Glycine max L. Merrill var. Acme were derived by culturing callus tissue 2 to 6 months on 40 milligrams per liter 2,4-D and designated 40R, 40B, and 40C. Tissue line 40R had a lower level of 2,4-D uptake in 2-week-old tissue which disappeared in 3.5-week-old tissue and less free 2,4-D following incubation for 24...

Substantial evidence supports a critical role for the activation of the Raf-1/MEK/mitogen-activated protein kinase pathway in oncogenic Ras-mediated transformation. For example, dominant negative mutants of Raf-1, MEK, and mitogen-activated protein kinase all inhibit Ras transformation. Furthermore, the observation that plasma membrane-localized Raf-1 exhibits the same transforming potency as o...

Cryopreservation of pollen from two ginseng species —Panax ginseng L. and P. quinquefolium L.—was studied. Freezing anthers that served as pollen carriers to –40C before liquid N storage affected pollen viability little after liquid N storage. Anther moisture content affected pollen viability significantly when stored in liquid N. The ideal anther moisture content to carry pollen for liquid N s...

AbstmclIn this paper, a 400-pm x 40C-prn, 2-D eapacitive micromachined ultrasonic transducer array element is experimentally characterized, and the results are found to be in agreement with theoretical predictions. As a receiver the transducer has a 1.8 x lo-' n m / m displacement sensitivity, and, as a transmitter, it produces 16.4 kPa/V of output pressure at the transducer surface at 3 MHz. T...

Endophytic fungi generally reside asymptomatically in the tissues of higher plants and generally are source of original amidase group of enzymes. Asparaginase is an important anticancer enzyme, endophytic fungi Eurotium Sp. was isolated from rhizomes of Curcuma longa and evaluated for asparaginase production by qualitative plate assay on modified Czapex dox’s agar and quantitative analysis by N...

This paper presents an ultra low power clock source using a 1μW temperature compensated on-chip digitally controlled oscillator (OscCMP) and a 100nW uncompensated oscillator (OscUCMP) with respective temperature stabilities of 5ppm/C and 1.67%/C. A fast locking circuit re-locks OscUCMP to OscCMP often enough to achieve a high effective temperature stability. Measurements of a 130nm CMOS chip sh...

An alginate-degrading bacterium, identified as Ochrobactrum sp. on the basis of 16S rDNA gene sequencing, was isolated from brown algal samples collected from the waters in close vicinity to the Dongtou Isles in the East China Sea. The strain, designated WZUH09-1, is a short rod, gram-negative, obligatory aerobic, grows under the following conditions: 5-40C, pH 3-9, and 0-2 times of the seawate...

An investigation was performed on the possibilities for an alteration of the total solidification temperature when preserving concentrated salt media (BME, MEM, 199, HAM), used for the maintenance of animal viruses and cell cultures. It had been established that by the use of dextran 40000, this temperature could be increased with about 20C. A protection in 3.6 % concentration was recommended a...

abstract during a survey for detection of pvs in potato fields in northern khorasan province, some tubers from the plants which have been already marked and showing mosaic, rugosity, undulation on leaf margins, little leaf and slightly vein deepening, were collected in bodjunrd region, also, some tubers from potato fields of mashhad, chenaran, ghoochan, faruj and shirvan regions were randomly c...