The possibility of attenuation of microseismic waves due to the presence of an upward folding of the ocean bottom into the liquid is discussed in this paper. The upward folding of the ocean bottom has been idealized by means of an irregularity in the form of a rectangle intruding into the liquid and the evaluation of the displacement component at any point of the solid medium has been carried out in two stages. First, the change in the incident mode of the surface wave due to the presence of the rectangular irregularity has been determined, and second, the subsequent change of the resulting displacement components due to the termination of the liquid layer and the step change in elevation of the solid medium at the continental margin has been discovered. Finally, numerical calculation has been made to determine the attenuation of the microseismic waves of different periods due to the presence of the rectangular irregularity at the ocean bottom.

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The ability of Climacodon septentrionalis to immobilize and kill a mycophagous nematode (Aphelenchoides sp.) in vitro is described for the first time. Two isolates produced droplets (20–45 μm in diameter) that formed at the apices of tall, stalked, and branching secretory cells (700–

,500 μm tall). On 2% modified malt extract agar, nematodes became enveloped in the droplets, which restricted their ability to move and resulted in complete immobilization and death within several hours of contact. The rate of decomposition of the nematodes varied considerably, with most individuals persisting for weeks whereas others were degraded within several days and appeared to be colonized by dense hyphal growth. This study provides the first documentation of a non-agaricoid fungus producing secretory cells that are able to immobilize nematodes.

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The effect of composition and controlled thermomechanical process parameters on the mechanical properties of HSLA steels is modelled using the Widrow-Hoff's concept of training a neural net with feed-forward topology by applying Rumelhart's back propagation type algorithm for supervised learning, using a Petri like net structure. The data used are from laboratory experiments as well as from the published literature. The results from the neural network are found to be consistent and in good agreement with the experimented results.

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An unsupervised learning technique and an associative memory have been used for encoding weights by a special type of Petri network named Petri neural net for modelling the influence of alloying elements on the final property of the high strength low alloy steel. The combined effects of alloying elements for different strengthening mechanisms is predicted when weights and threshold values are chosen on the basis of metallurgical understanding. The technique is found to be effective to create an associative memory of input-output relations in unknown data sets so that the same can be subsequently be used as a predictive tool.

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Primarily from the point of view of improvement of yield strength due to additions of niobium, titanium and boron in HSLA steels, the experimental steels are divided into five classes. The data are then supplied for learning a Self Organising Map (Kohonen network). It is found that the network with six neurons possesses better capacity of prediction with unknown data. Another effort of clustering the steels according to its major strength contributing mechanisms is also made. But the capacity of the network to cluster unknown data is found to be rather poor and has failed to follow from the metallurgical principles. To avoid this limitation, Learning Vector Quantisation method is adopted to impart a certain amount of supervision in the learning process and it is found that the training pattern of the network attains a good convergence thereby leading to a good predictive ability.

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A boron treated copper bearing HSLA steel containing austenite formers like manganese and nickel, somewhat lower in amount than that in HSLA 100 variety of steel is chosen for the study. The role of thermomechanical processing on the microstructure and mechanical properties of the above steel has been investigated. Differential scanning calorimetric study is carried out for understanding the precipitation behaviour of copper in HSLA steel under the influence of boron. The microstructure of the experimental steel is found to consist of laths of martensites and bainite. MA constituents of ribbon like morphology are observed at the lath boundaries. Higher strength properties of the steel are attributed to the presence of finely distributed precipitates of copper and microalloy carbides.

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Horizontal plate anchors are widely used in civil engineering constructions to resist vertical pulling loads. The available theoretical model suggested by Vesic to estimate the breakout resistance of plate anchors is in significant error, particularly for dense sandy soils. A theoretical model assuming a curved surface of failure through the surrounding soil, to evaluate the ultimate breakout resistance of horizontal plate anchors, has been proposed. It successfully brings out the concept of characteristics relative depth beyond which the breakout factor reaches a constant final value. It is capable of predicting breakout factors for wide range of values of angle of shearing resistance of sand.

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Simultaneous measurements of the total geomagnetic field intensity by the same type of the proton precession magnetometers at two stations in NW Turkey have been taken cooperatively by a research group since December 1970. Up to the end of July 1971 mainly three probable local magnetic changes were observed. It was seen that after a decrease in the local field at a magnetic station (Erdek) a few earthquakes occured at either nearly N or S of that station, and after an increase in the local field an earthquake took place nearly W of the same station. In this paper the data and some results of the first part of observations are given.

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Nine isoquinoline alkaloids belonging to the protoberberine, proaporphine and bisbenzyl-isoquinoline series were isolated from Caryomene olivascens (Menispermaceae). Four compounds are new : (-)-2-norlimacine (4), (-)-caryolivine (), (+)-, 2-dehydro-2-norlimacusine (9) and N-formylstepharine (). The last one is the first N-formyl derivative to be reported in the proaporphine group. Its biogenetic origin is discussed. Structures were established on the basis of 360 MHz (FT) nuclear magnetic resonance measurements and also by chemical correlation in the case of .

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The gamma-ray spectrum and the conversion-electron spectrum are measured in the decay of the ^116mIn activity. Directional correlations are also measured for 818–1293 and 1097–1293 keV cascades. The M-2 mixing ratio δ, and the -2 mixing ratio μ_k are obtained for 818. keV +→2₁⁺ transition to be δ=−+, and μ_k≤.×10⁻⁴ respectively. The 2 branching ratio (2; +→+): (2; +→2₁⁺): (2; +→0₁⁺) is determined to be .0158:.:.86.

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The phase diagrams of the Ni-Mo- and Ni-W- ternary systems in the region of less than 50mol% were constructed by thermodynamic calculation, based on the data obtained by thermodynamic measurement of the related materials. We found three ternary eutectic points and three or two ternary peritecto-eutectic points as follows:
:L (1365K, 71.mol%Ni-.mol%Mo-.mol%)=(Ni)++
:L (1355K, 62.mol%Ni-2.mol%Mo-30.mol%)=++
:L (1445K, 42.mol%Ni-30.mol%Mo-10.mol%)=(Ni)+NiMo+
:L (1812K, 34.9mol%Ni-42.mol%Mo-.mol%)+MoB=+
P₂:L (1633K, 42.mol%Ni-40.4mol%Mo-17.mol%)+Mo=+
:L (1812K, 53.mol%Ni-33.mol%Mo-12.mol%)+Mo=NiMo+
:L (1622K, 51.mol%Ni-31.mol%W-17.4mol%)=(Ni)+W+
:L (1260K, 71.mol%Ni-.mol%W-.mol%)=(Ni)++
:L (1291K, 65.4mol%Ni-4.mol%W-29.mol%)=++
:L (2115K, 23.mol%Ni-43.mol%W-33.mol%)+WB=+
P₂:L (1657K, 48.9mol%Ni-33.mol%W-18.mol%)+=W+
The calculated phase diagrams are expected to be useful for the development of new Ni-based heat-, corrosion- or wear-resistance alloys.

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The gamma-ray spectrum and the conversion-electron spectrum are measured in the decay of the Tb¹⁵² activity. The L-subshell electron lines of the 586. keV +→2₁⁺ transition are separated by the ion-free beta-ray spectrometer. The M-2 mixing ratio, δ², and the dimensionless ratio X of -2 mixing of the 586. keV transition are obtained to be δ²≤.16 and .034≤X≤.038, respectively. The 2 branching ratio (2; +→+): (2; +→2₁⁺): (2; +→0₁⁺) is determined to be .023 : . : ..

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Pharmacokinetics and bioavailability of 2 multivitamin preparations including _, _, _<12> and/or were studied in human male volunteers. The same dosage of 100 mg thiamine tetrahydrofurfuryl disulfide (_) was included in both preparations. However, one preparation (Alinamin EX^<(R)>) included high amounts of 100 mg pyridoxine hydrochloride (_), 1500 μg hydroxocobalamin (_<12>) and 100 mg d, l-α-tocopherol succinate (). The other (Alinamin A50^<(R)>) included 10 mg riboflavin (_2), 10 mg pyridoxine hydrochloride (_), 20 μg cyanocobalamin (_<12>). the results were as follows : ) _ : No difference was observed between AUC of both preparations. T_<max> tended faster in Alinamin EX^<(R)>. 2) _ : AUC by administration of Alinamin EX^<(R)> was 9 times larger than in Alinamin A50^<(R)>. ) _<12> : AUC by administration of Alinamin EX^<(R)> was 4 times larger than in Alinamin A50^<(R)>. 4) : A significant increase in plasma was observed by administration of Alinamin EX^<(R)>. AUC represents the area under curve obtained from the blood drug concentration of the time course.

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Bacterial resistance to already present antibiotics demands for new approaches in field of medicine. Scientists prefer nanoparticles (NPs) due to their promising potential in many applications. Two bacterial strains, Escherichia coli and Bacillus subtilis were used for biogenic synthesis of NPs. Characterization of prepared NPs was accomplished using UV-vis spectroscopy and fourier transform infrared spectroscopy (FTIR). The prepared NPs were confirmed by the color change from pale yellow to having white deposition for Zn NPs while from dark green to light green for Ni NPs. UV-vis spectroscopy of

. coli and

B

. subtilis based ZnNPs showed highest peak at 354nm and 362nm, respectively. Likewise,

E

. coli and

B

. subtilis NiNPs showed peaks at 246 nm and 238 nm, respectively. Antibacterial activity of

B

. subtilis based ZnNPs showed significant (p ≤ .05) zone of inhibition (ZOI; 27.±.) against

B

. subtilis and 26.66±.67 against

E

. coli at 100 mg/mL. Antibacterial activity of

E

. coli based ZnNPs showed .±. ZOI against

B

. subtilis and .±. ZOI against

E

. coli while NiNPs showed (25.±. mm) (ZOI) against

B

. subtilis and (25. ± . mm) against

E

. coli. Minimum inhibitory concentration (MIC) of

E

. coli ZnNPs showed values of .±. μg/mL for

E

. coli and 4.±. μg/mL for

B

. subtilis. MIC of

B

. subtilis ZnNPs showed .±. μg/mL for

E

. coli and .±. μg/mL for

B

. subtilis while NiNPs showed 33.±. μg/mL against

E

. coli and 24.±. μg/mL against

B

. subtilis as effective inhibitory concentrations. Minimum bactericidal concentration (MBC) of

E

. coli ZnNPs showed .±. μg/mL for

E

. coli and .±. μg/mL for

B

. subtilis. MBC of

B

. subtilis ZnNPs showed .±. μg/mL for

E

. coli and .±. μg/mL for

B

. subtilis while NiNPs showed 45.±. μg/mL against

E

. coli and 33.±. μg/mL against

B

. subtilis as effective inhibitory concentrations. It was concluded from the current study that biogenically synthesized ZnNPs and NiNPs are effective as promising antibacterial agents and have potential applications in biomedical fields.

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