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The general formulas for both 4-port magnetic-resonator circulators and 2-port magnetic-resonator bandpass filters (BPF's) are given. The effects of the circuit structure and the physical properties of the resonator on the characteristics of the circuit are investigated. The maximum dissipation loss of the resonator is just one half of the input power. Contrary to the results shown in previous reports, it is understood that for a given resonator, there exists an optimum value of the external Q of the circuit and also that a polycrystalline magnetic resonator may be useful for the nonreciprocal circuit, if the product of unloaded Q and saturation magnetization has a sufficiently large value. The requirements for the insertion loss (IL), the reverse loss (RL), and the reflection at the center frequency are introduced, and then the necessary conditions of resonator loss and the limitations of 3-dB bandwidth and available range are clarified.

Ovariotomy in 8 week-old, specific pathogen free ICR/JCL mice was effective in securing a marked thymus regeneration following a single whole body irradiation with 300 rads of X-ray. Recovery of the bone marrow cell counts, especially of the lymphoid cells, preceded the thymus regeneration and was more marked in spayed mice than in the sham-operated. On the basis of these results, it is suggested that ovarian hormones play a role in the thymic lymphopoiesis by affecting the dynamics of the lymphoid stem cells in the bone marrow and/or the lymphopoietic microenvironments in the thymic cortex.

The reactions of poly(vinyl chloride) (PVC) with some nucleophiles such as azide, thiophenoxide and dithiocarbamate ions do not take place in water. These heterogeneous reactions are remarkably catalyzed by cationic surfactants. Urea and methanol which destroy hydrophobic bondings inhibit the reaction. On the basis of the experimental data it was assumed that the cationic surfactants are adsorbed on the surface of the suspended PVC powder and that the positive charges attract the nucleophiles.

Ninety-seven young children were tested their hearing acuities by the behavioral tests and the evoked response audiometry in sleep in 1969. Most of their age ranged from 1 to 3 years old. The chlorpromazine and monosodium trichlorethyl phosphate syrup were given to induce sleep. Ten cases failed to sleep for the first test, but they succeded to sleep for the second test. Fifty-five cases showed their P2 latencies around 200msec, 15 cases around 250msec and 12 cases 300msec or more.ERA thresholds of 59 cases were compared with behavior thresholds. The threshold differences revealed that 68% of them were within ±10dB.Our cases included mentally retarded children, which affected the results of the behavioral tests, and 10 cases showed the lower threshold of more than 10dB in ERA. No conclusion was made about in what degree ERA threshold gave higher threshold than those of the behavioral tests.

Experimental results of the 4-port nonreciprocal band-stop-pass filter and the tunable resonance type circulator with the properties of the 4-port filter are reported, and the theory of the new nonreciprocal circuit is discussed. The filter operates over a two-octave frequency range and the over about a one-octave frequency range.

An electromagnetic wave absorber utilizing ferrite or rubber ferrite composed of ferrite powder and rubber is described. In our investigation, the existence of a matching frequency f/sub m/ and a matching thickness t/sub m/ has been found. The terms f/sub m/ and t/sub m/ mean that the ferrite which is backed with a conducting plate can be a perfect absorber only under the conditions that the frequency of the incident wave is f/sub m/ and that the thickness of the ferrite is t/sub m/.Each ferrite has two matching frequencies f/sub m1/, f/sub m2/, (f/sub m1

The development of a system which provides power-constant loci on a Smith chart automatically is presented. The system consists of phase shifters terminated with p-i-n diodes, and a network analyzer.

In order to make clear the characteristics of transpiration of head forming vegetables such as lettuce, cabbage and chinese cabbage, their transpiration amount was measured by the transpiration chamber method in Taketoyo fields, Aichi prefecture in 1962. This paper deals mainly with the transpiration of lettuce. Varieties used were Great Lakes 659 (head lettuce) and Kakichisha (asparagus lettuce). The results obtained are as follows.1. Transpiration amout and water requirement of head lettuce were less than those of asparagus lettuce. This tendency was found as well in the other heading vegetables as shown in Table 2. This is due to the fact that either amount of transpiration per unit dry matter weight or per unit leaf area of head lettuce was less than that of asparagus lettuce as shown in Tables 2 and 4.2. Moisture content of heading lettuce was normally 2-3% higher than that of asparagus lettuce, owing to the higher moisture content of its heading parts as shown in Table 1. So it may be said that heading vegetables require less water than non-he ading ones.2. The maximum transpiration amount per plant per day (from 6 a. m. to 6 p. m.); 322g in head lettuce and 462g in asparagus lettuce, appeared on May 30 when it was fine all day. The maximum relative transpiration rate appeared on July 8, when the lettuce was in the midst of heading or 15 days after the start of heading, as shown in Table 4. These facts suggest us that the transpiration amount per plant will be highest on a fine day when the lettuce is in the midst of heading.3. Transpiration amount increased usually with the growth of plant, until the heading stage of head lettuce as shown in Table 4 and Fig. 3. Decrease of the transpiration after head formation might be due to the low transpiring power of old outer-leaves and of heading part in head lettuce. Young leaves transpired more water than old ones as shown in Table 3, when the transpiration was measured by the chamber method as shown in Fig. 2.4. Among many characters of a plant, leaf area highly correlated with transpiration amount per plant in usual. Particularly, in the case of head lettuce, area of outer old leaves had the highest correlation with transpiration per plant as in Table 5.5. Among meteorological factors, solar radiation had the highest correlation with transpiration amount as shown in Table 6.

The general formula for 4-port nonreciprocal circuit is given. The effects of structures and physical properties of resonator on the characteristics of the circuit are investigated. The limitations of available frequency range are clarified.