印度高技术中心的激光与粒子加速器研究

在印度前总理英迪拉甘地亲自关心下建立的印度高技术中心,主要从事激光和粒子加速器研究.目前已建立了2×1012W的四路钕玻璃激光振荡放大链,用于激光等离子体研究;建立的两台同步辐射源,临界波长分别为3.8A和61A,主要用于显微照相,光刻和微型机械元件加工等领域.     

Occurrence of dictyosteliaceae in the rhizosphere of plants in Southern India

Zusammenfassung Sechs Arten von Dictycosteliaceae sind in Indien zum ersten Mal aus bebautem und unbebautem Boden isoliert worden. Ihr Vorkommen in nichtkultivierten Böden war bis jetzt unbekannt. Die Rhizosphäre der Pflanzen scheint ein wichtiges Habitat dieser Organismen zu sein.     

Occurrence of DDT and BHC residues in human milk in India

Summary Samples of human milk from Punjab, India have shown the presence of DDT and BHC residues in amounts greater than those reported from most of the other countries.This research has been financed in part by a grant made by the United States Department of Agriculture, Agricultural Research Service authorized by Public Law 480.     

Occurrence of DDT and BHC residues in human milk in India

The presence of pesticide residue of DDT and of BHC were determined in 1979 in samples of milk from 75 lactating mothers from Punjab, within a week after delivery. DDT and BHC residues were found present in all 75 samples collected. Recovery of isomers of BHC and metabolites/isomers of p.p'-DDT from the spiked samples was above 80%. The mean level of DDT residue was 0.51 ppm, which is more than the level reported from the U.S., Canada, Europe and Australia, but less than the level found in Guatemala. BHC residues also were higher than those found in other countries, with the exception of Japan. DDT level of 0.5 ppm in milk represents an infant intake of 0.09 mg/kg/day, which is 18 times the acceptable daily intake (0.005 mg/kg/day) recommended by the WHO. Acceptable daily intake of BHC has not yet been established.     

The problem of coincidences

Summary This paper deals with the origin, history and various appearances of the problem of coincidences (matches, rencontres) in the theory of probability.     

A new species of protomycopsis from India

Zusammenfassung Vergleichende Untersuchungen des auf Bl?ttern vonSesbania grandiflora Pers. vorkommenden PilzesProtomycopsis aus Varanasi (Indien) ergeben eine bisher unbeschriebene Art, die von uns alsProtomycopsis thirumalacharii Pavgi bezeichnet wird.      

The problem of confirmation in the Everett interpretation

I argue that the Oxford school Everett interpretation is internally incoherent, because we cannot claim that in an Everettian universe the kinds of reasoning we have used to arrive at our beliefs about quantum mechanics would lead us to form true beliefs. I show that in an Everettian context, the experimental evidence that we have available could not provide empirical confirmation for quantum mechanics, and moreover that we would not even be able to establish reference to the theoretical entities of quantum mechanics. I then consider a range of existing Everettian approaches to the probability problem and show that they do not succeed in overcoming this incoherence.     

Germ cell chromosomes in two species of terrestrial isopods from India

Summary In 2 species of terrestrial isopods, namelyPorcellio assamensis andP. laevis, the diploid and haploid numbers of chromosomes have been established to be 48 and 24 respectively for the former species and 50 and 25 respectively for the latter species. Female heterogamety of the ZW type has been found to exist inP. laevis.The authors express their sincere thanks to Prof. G.P. Sharma, and to Prof. S. Khera, Department of Zoology, Panjab University, Chandigarh, for the necessary laboratory facilities.     

Stysanus stemonites (Pers.) Corda on potato in cold store in India

Zusammenfassung Stysanus stemonites (Pers.) Corda wurde aus in Kälte gelagerten Kartoffelknollen isoliert. Kulturversuche zeigten, dass dieser Pilz unter Kältebedingungen auf den KnollenschädlingenPythium ultimum undFusarium coeruleum parasitiert.Stysanus stemonites ist ursprünglich ein Saprophyt, soll aber nach Berichten aus den USA auf Kartoffelknollen eine Fleckenoder Braunfäule verursachen. Möglicherweise wächst der Pilz aber auch in diesen Fällen nur als Hyperparasit auf andern Knollenfäuleerregern.     

White leaf disease ofCynodon dactylon Pers., a mycoplasmal disease in India

Summary White leaf disease of Bermuda grass (Cynodon dactylon Pers.) has been reported from a few countries to be caused by a mycoplasma-like organism. We have tried to observe the causal agent in white leaf diseased plants ofC. dactylon collected near Varanasi. Both tetracycline treatment and electron microscopy have revealed the presence of mycoplasma-like bodies in phloem cells of the diseased plants.     

The Duhem-Quine problem for equiprobable conjuncts

In this paper, we distinguish Quine’s thesis of holism from the related Duhem-Quine problem. We discuss the construal of holism which claims that the effect of falsification is felt on a conjunction of hypotheses. The Duhem-Quine problem claims that there is no principled way of knowing how falsification affects individual conjuncts. This latter claim relies on holism and an additional commitment to the hypothetico-deductive model of theory confirmation such that it need not arise in non-deductive accounts. While existing personalist Bayesian treatments of the problem make this point by assuming values of priors for the conjuncts, we arrive at the same conclusion without invoking such assumptions. Our discussion focuses on the falsification of equiprobable conjuncts and highlights the role played by their alternatives in ascertaining their relative disconfirmation. The equiprobability of conjuncts is discussed alongside a historical case study