Showing papers by "Cairo University published in 1970"
TL;DR: In this paper, local heat transfer coefficients along a flat plate in natural convection in air were measured using Boelter-Schmidt type heat flux meters, and the results were presented in terms of local Nusselt number as a function of the local Grashof number "tangential component".
111 citations
TL;DR: Cephalosporium maydis infects young maize plants easily, but as plants age fewer are infected and none after approx.
Abstract: SUMMARY
Cephalosporium maydis infects young maize plants easily, but as plants age fewer are infected and none after approx. 50 days from sowing. The mesocotyl and seminal, fibrous and adventitious roots are attacked, especially when there is damage or much inoculum. Most penetration occurs where roots are elongating and emerge from the mesocotyl or from fibrous roots. At first the fungus grows superficially on roots, producing hyphae with short, brown, thick-walled, and swollen cells. After penetrating, the fungus spreads towards the xylem, where it grows slowly at first but after 5 weeks grows faster upwards.
C. acremonium causes black-bundle disease of maize. It seems to infect plants growing in unfavourable conditions but the details remain uncertain. The percentage of plants infected was not related to the amount of inoculum and the fungus may not be a primary parasite. The sterile culture filtrate of the fungus produces vascular discoloration and wilt of maize seedlings.
49 citations
TL;DR: The cervix is the commonest site in the female genital tract to be affected by bilharziasis, and the clinico‐pathological peculiarities of bilharZial carcinoma of the cervix are described.
33 citations
TL;DR: The competitive saprophytic ability (CSA) of Cephalasporium maydis was smaller at 30 dC when measured by the agar-plate modification than by the original Cambridge method.
Abstract: SUMMARY
The competitive saprophytic ability (CSA) of Cephalasporium maydis was smaller at 30 dC when measured by the agar-plate modification than by the original Cambridge method. The agar-plate method suggested that C. maydis was a less competitive saprophyte than C. acremonium although both were low in CSA.
C. acremonium grows and sporulates well on organic and synthetic media. C. maydis grows faster but is more exacting nutritionally and is less able to decompose cellulose or maize straw than C. acremonium. Neither fungus produced pectolytic culture filtrates and both were susceptible to antibiotics produced by soil micro-organisms.
C. maydis survived on maize straw much longer than C. acremonium. In field soils C. maydis colonized and survived in supplemented wheat bran poorly and not below the top 20 cm of soil.
30 citations
30 citations
TL;DR: This previously undescribed complication of intestinal schistosomiasis may lead to serious depletion of the body albumin in patients with concomitant protein malnutrition.
26 citations
23 citations
TL;DR: In this paper, a separable expansion for the t -matrix is developed for repulsive cores and the resulting Faddeev equations form a set of coupled equations in one continuous variable, and the three body binding energy is calculated using a Gaussian form for the repulsive and attractive parts of the potential.
21 citations
TL;DR: New mothers delivered by cesarean section were divided into four groups, and were given either placebo, estrogen, progestogen, or a combination of these daily for 14 days, starting on the second day postpartum.
21 citations
TL;DR: In this article, the variation of lower yield stress with grain size has been established in niobium of two different levels of impurity, and the results obey closely the Hall-Petch relationship, σy=σi + Kyd−12, with Ky⋍1.1 kg mm−32.
20 citations
TL;DR: Follow-up studies including pyelography, blood chemistry, proctography and proctometry showed this procedure to have many of the features of an ideal diversion and this method is recommended.
Abstract: SUMMARY
Sixty-four patients undergoing cystectomy and diversion for carcinoma of the bladder are reported. Construction of a rectal bladder and left iliac colostomy was the means of diversion. The post-operative mortality was 17-1 per cent. and there were 28 complications in 17 patients.
Follow-up studies including pyelography, blood chemistry, proctography and proctometry showed this procedure to have many of the features of an ideal diversion and this method is recommended.
TL;DR: The embryonic osteocranium of the elapid snake, Naja haje (Egyptian cobra) has been studied and the osteocr skull of the 166-mm embryo has been graphically reconstructed and described in detail.
Abstract: The embryonic osteocranium of the elapid snake, Naja haje (Egyptian cobra) has been studied. The osteocranium of the 166-mm embryo has been graphically reconstructed and described in detail. Those of younger and older embryos as well as the just-hatched young have been also investigated. The membrane-bones make their appearance before any sign of ossification in the cartilaginous cranium. The maxillary, palatine and pterygoid premordia have an earlier appearance than the other bony premordia.
The fused premaxillae arise beneath the antero-medial part of the solum nasi of the nasal capsules. They send dorsally the rudiment of the processus nasalis and posteriorly two small processes. The nasal develops as a protecting bony roof for the cartilaginous nasal capsule. It possesses a median descending portion which penetrates deeply between the capsules. The frontal arises at first over the fenestra olfactoria advehens and the planum antorbitale, then extends posterioly. Its median descending portion has not yet ossified. The prefrontal embraces the posterolateral surface of the nasal capsule. It is perforated by the foramen of the lacrymo-nasal duct, the lacrymal bone is completely absent. The parietal is very long forming the incomplete roof and the side wall of the temporal region. It is quite apart from the frontal. The cranial roof between the two frontals and two parietals is bridged by connective tissue. Both the frontal and parietal bones form well developed lateral down-growths. The postfrontal is present, lying just lateral to the anterior part of the descending process of the parietal, but the postorbital is completely lacking.
There is only one temporal bone which is regarded as the supra-temporal. This bone arises just lateral to the auditory capsule, its posterior part is intercalated between the quadrate and the capsule. The squamosal, tabular, jugal and quadratojugal are totally absent. The maxilla arises directly below the anterior half of the eye. It sends inwards a well developed palatal process. The rudiments of the maxillary teeth, including those of the poisonous fangs, have not yet been attached to the bone. The prevomer forms the medial wall and floor of the bony capsule which surrounds Jacobson's organ. It consists of a medial portion which extends nearly vertically and a ventral one which extends horizontally. The septomaxilla forms the lateral wall and a part of the floor of Jacobson's organ bony capsule. It possesses a very long posterior projection. The palatine arises medial to the maxilla, posteriorly it is about to touch the anterior tip of the pterygoid. The pterygoid is very long, occupying about half the total length of the palate. Both the palatine and pterygoid carry teeth which have not yet been completely attached to the bones. The ectopterygoid arises lateral to the hind extremity of the palatine and the anterior half of the pterygoid. The parasphenoid is a narrow elongated bone which arises in between the anterior halves of the trabeculae cranii. It is completely separate from the lateral down-growths of the frontals and from the basisphenoid.
Other than the cartilage-bone, the articular, each ramus of the lower jaw is composed of the following membrane-bones: dentary, splenial, angular, and the combined supra-angular and prearticular. The fusion between the supra-angular and prearticular takes place in late embryos.
As regards the cartilage-bones, the basioccipital ossifies perichondrally in the posterior part of the basal plate, behind the basicranial fenestra. The exoccipital ossifies in the occipital arch, and spreads medially forming a center in the posterior part of the tectum synoticum. The basisphenoid ossifies in the anterior region of the basal plate (including the crista sellaris) and the posterior ends of the trabeculae cranii. The basicranial fenestra is still present in its center. The supraoccipital arises from a pair of perichondral lamellae formed on the dorsal and ventral surfaces of the anterior part of the tectum synoticum. Laterally, on either side, it extends slightly in the roof of the auditory capsule, but this lateral part must not be considered as an epiotic since its independent ossification is not observed. The opisthotic arises from two perichondral lamellae on the outer and inner surfaces of the postero-lateral part of the auditory capsule. It is quite separate from the exoccipital. The prootic ossifies perichondrally in the anterior portion of the auditory capsule, as far backwards as the anterior margin of the fenestra ovalis. The epipterygoid is completely lacking. The quadrate bone is formed by the perichondral ossification of the quadrate cartilage and the intercalare. The stapes and the shaft of the columella auris ossify perichondrally, but the processus dorsalis is still cartilaginous.
The laterosphenoid bone is wedged between the auditory capsule and the basisphenoid, it is completely fused with the prootic. It is of double origin; its ventral part arises by the perichondral ossification of the laterosphenoid cartilage while its dorsal part arises without cartilaginous preformation. The articular arises perichondrally round the hind part of Meckel's cartilage, it is distinct from the combined supra-angular and prearticular. No ossification occurs in the hyoid apparatus.
TL;DR: It appears that oral niridazole is equal to sodium antimony tartrate in the treatment of S. haematobium infection in young patients, and in 5 young patients radiological and functional improvement occurred.
Abstract: 17 male farmers aged 9–18 years infected with S. haematobium were treated with oral niridazole (Ambilhar). The daily dose was 25 mg. per kg. body weight in divided doses for 6 days. Bell's egg-count technique was used to assess intensity of infection and percentage reduction of egg excretion after treatment. The criterion of cure was the absence of live eggs in the urine 3 months after treatment. All patients were cured, side effects were minimal, and in 5 young patients radiological and functional improvement occurred. It appears that oral niridazole is equal to sodium antimony tartrate in the treatment of S. haematobium infection in young patients.
TL;DR: A rapid and sensitive two-dimensional TLC-colorimetric method for the simultaneous determination of khellin and visnagin in Ammi visnaga fruits, extracts, and formulations is presented.
TL;DR: In this article, the authors used the reversible permability of magnetic domain walls to study the interaction behavior of dislocation and dislocations with migrating domain walls under low magnetic fields in pure nickel and found that increasing the dislocation density by cold working decreased the initial permiability and increased the coercive force.
TL;DR: The Mannich reaction on 3-oxo-5,6-diphenyl-2,3-dihydro-1,2,4-triazine (1) and on 3,5-dioxo-6-phenyl, 2,3,4,5,tetrahydro, 1.4, and 3.4 triazin (4) using piperidine or morpholine together with formaldehyde, leads to the formation of 5a, b and 6a, respectively, b, respectively.
TL;DR: In this paper, the identification of the clay minerals in some Nile Delta sediments were based upon the X-ray diffraction characteristics of the −5 μ e.s.d. fractions and their response to glycerol and heat treatments.
TL;DR: In this paper, a reaction of 3-Methyl-1-phenyl-pyrazolone (1, R = H) with sodium α-anilinobenzylsulfonate leads to 4-[α-Anilino-benzyl]- derivative.
TL;DR: In this article, the parameters of the electrocapillary maximum of mercury, γmax and Emax were determined in aqueous sodium azide solutions of concentration ranging between 0.05 and 2.0 M at 25°C.
TL;DR: In this article, the hybrid-pi equivalent circuit for small-signal representation of junction transistors in the normal domain is extended to cover sinusoidal voltages of large amplitudes.
Abstract: The well-known hybrid- \pi equivalent circuit for small-signal representation of junction transistors in the normal domain is extended to cover sinusoidal voltages of large amplitudes. The effective parameters thus obtained as the result of the inherent exponential nonlinearities are expressed in terms of the small-signal parameters and the amplitude. Both resistive and reactive parameters are considered. The proposed effective equivalent circuit serves as the basis for the design of a large class of LC sinusoidal oscillators, mixers, tuned power amplifiers, and harmonic generators, and also as the basis for computing the terminal parameters as functions of amplitude. In the event that small-signal terminal parameters constitute the only data available on the device, a method is given to compute from these data the small-signal hybrid- \pi parameters required for the effective parameters.
TL;DR: The Warburg's manometric technique was used to measure the rate of oxygen consumption of the second generation of laboratory-reared snails, Biomphalaria alexandrina and Bulinus truncatus at two temperatures of 25° and 30°C to clarify the metabolism of both schistosome-infected and uninfected snails.
Abstract: The Warburg's manometric technique was used to measure the rate of oxygen consumption of the second generation of laboratory-reared snails, Biomphalaria alexandrina and Bulinus truncatus at two temperatures of 25° and 30°C. The individual weight of the experimental snails ranged between 40 and 78 mg for B. alexandrina, between 60 and 90 mg for B. truncatus.
TL;DR: In this paper, the electron transfer of the chloride, azide and bromide ions at 1 M concentration during reduction of Zn 2+, Cd 2+, Pb 2+ and In 3+ at the dme has been examined with faradaic impedance measurements.
TL;DR: Grignard reagents add to the exocyclic C C-bond in 2-arylidene-2,3-dihydro-thiazolo[3,2-a]-benzimidazol-3-ones as mentioned in this paper.
TL;DR: Details of three sets of onjoin d twins living within 2 y ar in an obstetric service of 4,500 deliveries per are presented, attributing the rise to increasing availability of tatis tical and med ical information from Asia and Africa and to an increasing incid nee of ucce ful separation of conjoined twin.
TL;DR: In this paper, a new method for calculating the corona current and its effect on high voltage travelling surges is presented, which is computed using the known theories of corona discharges for different surge voltages and conductor sizes.
Abstract: A new method for calculating the corona current and its effect on high voltage travelling surges is presented. The corona current is computed using the known theories of corona discharges for different surge voltages and conductor sizes. The calculated corona current wave per meter of the line conductor is used in computing the distortion of the voltage surges as they travel along overhead transmission lines. The calculated current and distortion generally agree with previous experimental findings.
TL;DR: In this paper, the galvanostatic relations during anodic polarization to the O2-evolution potential, followed by cathodic polarization in the H2evolutions potential were measured by measuring galvanostactic relations, and the effect of pH on the potential E of two anodic arrests was given by dE/dpH = -70 to -75 mV.
TL;DR: In this article, the absorption spectra of Co(ClO 4 ) 2 ·6H 2 O were scanned in a number of organic solvents and different transition probabilities between the states of the same parity were computed.
TL;DR: In this paper, the differential capacitance of aqueous sodium azide solutions was measured at 25°C as a function of polarization with respect to the Ag/AgN 3 electrode in the same solution.
TL;DR: Moderator variable analysis was carried out and was shown to reveal interaction effects among personality variates in determining creativity test scores.