Ecology and population studies of land slug, laevicaulis alte in shahada region

The land slug, Laevicaulis alteis very commonly found in and around shahada tehsils. These are hermaphrodite and reproduce by cross fertilization. The annual reproductive cycle passes through three phases. The pre-reproductive phase is the preparatory phase in which accumulation of various nutritive molecules occurs.The preparatory phase occurs before onset of monsoon. The monsoon is the breeding phase in which availability of water and moisture in the environment influences the breeding activities.They lay about 22-26 eggs in a chain of mucus like jelly found in humus or under any substratum and decaying leaves in and around moist area. Slugs in Dongargaon (Site-A) and Manarad (Site-B) habitat were observed in Shahada city area.The population correlation studies between alkaline nature (pH) of soil and number of slugs in Site-A is r²=0.13 and in Site-B isr²= 0.61.The rainfall in the season is the prime factor that might causes fluctuations in the breeding activities. The population and breeding behaviour of Laevicaulis alteis studiedin shahada area. In present work the correlation of ecological changes and breeding cycle of a land slug Laevicaulis alteis studied during June 2015 to March 2016.

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Miten roskan lukeminen laajentaa kirjallisuuden opetuksen mahdollisuuksia?

Ainedidaktiikka ◽

10.23988/ad.97366 ◽

2020 ◽

Vol 4 (3) ◽

Author(s):

Päivi Koponen

Keyword(s):

Basic Education ◽

Literature Teaching ◽

Ecological Changes ◽

The Pacific ◽

Human Material ◽

Plastic Bag ◽

Material Turn ◽

A Chain ◽

Pedagogy Literature ◽

Environmental Pedagogy

Vaikka kestävän kehityksen tavoitteet ovat keskeinen osa nykyisiä opetussuunnitelmauudistuksia, hakevat ympäristöpedagogiset käytännöt yhä monessa oppiaineessa muotoaan. Tarkastelen peruskoulun ja lukion äidinkielen ja kirjallisuuden oppiaineen sisällä tapahtuvan kirjallisuuden opetuksen ympäristöpedagogisia mahdollisuuksia. Tuon 2000-luvun filosofisen ja ihmistieteellisen tutkimuksen materiaalisen käänteen vuoropuheluun monilukutaidon pedagogiikan kanssa. Aineistonani luen Rachel Hope Allisonin "mykkää” sarjakuvaromaania I’m not a plastic bag, joka kuvaa ihmisperäisen jätteen päätymistä Tyyneen valtamereen. Alkaa ekologisten muutosten ketju, jossa pelkästään ihmisen toiminta ei ole maailmaa muuttavaa; myös ei-inhimillinen toimii ja tuottaa toimijuutta. Tavoitteenani on tuoda kirjallisuuden opetuksen käyttöön tietoa siitä, miten ei-inhimillistä, materiaalista ja vaikeasti kielen tasolla tulkittavaa toimijuutta on mahdollista lukea. Tuloksia on mahdollista hyödyntää ympäristöpedagogisen kirjallisuuden opetuksen kehittämisessä. How reading waste expands the possibilities of literature teaching? “Non-interpretable” matter and its reading in the development of environmental pedagogy literature teaching Abstract Although education for sustainable development is a key part of current curriculum reforms, many subjects do not yet have enough environmental pedagogy practices. I study how environmental pedagogy can be put into practice in compulsory basic education and general upper secondary school literature teaching within the subject of Finnish language and literature. I want to bring the material turn within 21st century philosophical and humanistic research into a dialogue with multiliteracy/multiliteracies pedagogy. I read Rachel Hope Allison’s “mute” graphic novel I’m not a plastic bag, which represents human waste ending up in the Pacific Ocean. A chain of ecological changes begins, in which human activity alone is not changing the world; also non-human acts and produces agency. My aim is to bring forth an understanding of how non-human, material and linguistically difficult-to-interpret agency can be read within literature teaching. The results can be used in developing environmental pedagogy literature teaching. Keywords: Material turn, multiliteracy/multiliteracies, environmental pedagogy literature teaching

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Effect of altered thyroid and adrenal activity on the seasonal reproduction of the Indian palm squirrel, Funambulus pennanti

Canadian Journal of Zoology ◽

10.1139/z93-220 ◽

1993 ◽

Vol 71 (8) ◽

pp. 1558-1561 ◽

Cited By ~ 1

Author(s):

A. B. Singh ◽

Chandra Mohini Chaturvedi

Keyword(s):

Adrenal Glands ◽

Optimal Level ◽

Gonadal Development ◽

Breeding Cycle ◽

Inhibitory Effects ◽

Annual Reproductive Cycle ◽

Natural Conditions ◽

Breeding Condition ◽

Corticosterone Treatment ◽

Altered Thyroid

Thiouracil and metyrapone administered during the progression phase of the annual reproductive cycle inhibited gonadal development in the Indian palm squirrel, Funambulus pennanti. In a further experiment, these drugs led to normal gonadal regression during the late breeding phase. Thyroxine and corticosterone treatment, on the other hand, maintained the gonads continuously in breeding condition, unlike those of controls, which exhibited characteristic post-reproductive regression. Since hypofunction of the thyroid and adrenal glands had inhibitory effects on the initiation of seasonal gonadal growth, and hyperactivity affects post-reproductive regression, it is suggested that an optimal level of hormones is required for the normal breeding cycle in this subtropical mammal. The results are discussed in terms of an interrelationship between the seasonal thyroid, adrenal, and gonad cycles under natural conditions.

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Observation of Atom Rows in Thorium Pyromellitate Using a Field Emission STEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010007802x ◽

1977 ◽

Vol 35 ◽

pp. 80-81

Author(s):

H. Todokoro ◽

S. Nomura ◽

T. Komoda

Keyword(s):

Field Emission ◽

Amorphous Carbon ◽

Carbon Film ◽

Dark Field Image ◽

Dark Field ◽

Amorphous Carbon Film ◽

Atomic Size ◽

Wide Range ◽

A Chain

It is interesting to observe polymers at atomic size resolution. Some works have been reported for thorium pyromellitate by using a STEM (1), or a CTEM (2,3). The results showed that this polymer forms a chain in which thorium atoms are arranged. However, the distance between adjacent thorium atoms varies over a wide range (0.4-1.3nm) according to the different authors.The present authors have also observed thorium pyromellitate specimens by means of a field emission STEM, described in reference 4. The specimen was prepared by placing a drop of thorium pyromellitate in 10-3 CH3OH solution onto an amorphous carbon film about 2nm thick. The dark field image is shown in Fig. 1A. Thorium atoms are clearly observed as regular atom rows having a spacing of 0.85nm. This lattice gradually deteriorated by successive observations. The image changed to granular structures, as shown in Fig. 1B, which was taken after four scanning frames.

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SEM and TEM observations of sperm development in the testis of the freshwater fish Oreochromis mossambicus

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100157838 ◽

1990 ◽

Vol 48 (3) ◽

pp. 58-59

Author(s):

Daryl A. Cornish ◽

George L. Smit

Keyword(s):

Morphological Characteristics ◽

Oreochromis Mossambicus ◽

Breeding Cycle ◽

Limited Information ◽

North West ◽

The North ◽

Sem And Tem ◽

Sperm Development ◽

Ultrastructural Characteristics ◽

The University

Oreochromis mossambicus is currently receiving much attention as a candidater species for aquaculture programs within Southern Africa. This has stimulated interest in its breeding cycle as well as the morphological characteristics of the gonads. Limited information is available on SEM and TEM observations of the male gonads. It is known that the testis of O. mossambicus is a paired, intra-abdominal structure of the lobular type, although further details of its characteristics are not known. Current investigations have shown that spermatids reach full maturity some two months after the female becomes gravid. Throughout the year, the testes contain spermatids at various stages of development although spermiogenesis appears to be maximal during November when spawning occurs. This paper describes the morphological and ultrastructural characteristics of the testes and spermatids.Specimens of this fish were collected at Syferkuil Dam, 8 km north- west of the University of the North over a twelve month period, sacrificed and the testes excised.

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Time-Resolved Cryo-Electron Microscopy of Oscillating Microtubules

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100181269 ◽

1990 ◽

Vol 48 (1) ◽

pp. 502-503

Author(s):

Eva-Maria Mandelkow ◽

Ron Milligan

Keyword(s):

Electron Microscopy ◽

Dynamic Instability ◽

Entire Solution ◽

Reaction Scheme ◽

Time Resolved ◽

X Ray ◽

X Ray Scattering ◽

A Chain ◽

Ray Scattering

Microtubules form part of the cytoskeleton of eukaryotic cells. They are hollow libers of about 25 nm diameter made up of 13 protofilaments, each of which consists of a chain of heterodimers of α-and β-tubulin. Microtubules can be assembled in vitro at 37°C in the presence of GTP which is hydrolyzed during the reaction, and they are disassembled at 4°C. In contrast to most other polymers microtubules show the behavior of “dynamic instability”, i.e. they can switch between phases of growth and phases of shrinkage, even at an overall steady state [1]. In certain conditions an entire solution can be synchronized, leading to autonomous oscillations in the degree of assembly which can be observed by X-ray scattering (Fig. 1), light scattering, or electron microscopy [2-5]. In addition such solutions are capable of generating spontaneous spatial patterns [6].In an earlier study we have analyzed the structure of microtubules and their cold-induced disassembly by cryo-EM [7]. One result was that disassembly takes place by loss of protofilament fragments (tubulin oligomers) which fray apart at the microtubule ends. We also looked at microtubule oscillations by time-resolved X-ray scattering and proposed a reaction scheme [4] which involves a cyclic interconversion of tubulin, microtubules, and oligomers (Fig. 2). The present study was undertaken to answer two questions: (a) What is the nature of the oscillations as seen by time-resolved cryo-EM? (b) Do microtubules disassemble by fraying protofilament fragments during oscillations at 37°C?

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Do Event-Related Brain Potentials Reflect Mental (Cognitive) Operations?

Journal of Psychophysiology ◽

10.1027//0269-8803.16.3.129 ◽

2002 ◽

Vol 16 (3) ◽

pp. 129-149 ◽

Cited By ~ 13

Author(s):

Boris Kotchoubey

Keyword(s):

Cognitive Processes ◽

Point Of View ◽

Internal Variables ◽

Brain Potentials ◽

Cognitive Operations ◽

External Variables ◽

Series Of Experiments ◽

Mental Operations ◽

A Chain ◽

Processing Mechanisms

Abstract Most cognitive psychophysiological studies assume (1) that there is a chain of (partially overlapping) cognitive processes (processing stages, mechanisms, operators) leading from stimulus to response, and (2) that components of event-related brain potentials (ERPs) may be regarded as manifestations of these processing stages. What is usually discussed is which particular processing mechanisms are related to some particular component, but not whether such a relationship exists at all. Alternatively, from the point of view of noncognitive (e. g., “naturalistic”) theories of perception ERP components might be conceived of as correlates of extraction of the information from the experimental environment. In a series of experiments, the author attempted to separate these two accounts, i. e., internal variables like mental operations or cognitive parameters versus external variables like information content of stimulation. Whenever this separation could be performed, the latter factor proved to significantly affect ERP amplitudes, whereas the former did not. These data indicate that ERPs cannot be unequivocally linked to processing mechanisms postulated by cognitive models of perception. Therefore, they cannot be regarded as support for these models.

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Right-Hemisphere Specialization for Contour Grouping

Experimental Psychology (formerly Zeitschrift für Experimentelle Psychologie) ◽

10.1027/1618-3169/a000252 ◽

2014 ◽

Vol 61 (5) ◽

pp. 331-339 ◽

Cited By ~ 1

Author(s):

Gregor Volberg

Keyword(s):

Right Hemisphere ◽

Contour Detection ◽

Global Processing ◽

Detection Accuracy ◽

Frequency Spectra ◽

Visual Hemifield ◽

Spatial Frequencies ◽

A Chain ◽

The Right ◽

Hemisphere Specialization

Previous studies often revealed a right-hemisphere specialization for processing the global level of compound visual stimuli. Here we explore whether a similar specialization exists for the detection of intersected contours defined by a chain of local elements. Subjects were presented with arrays of randomly oriented Gabor patches that could contain a global path of collinearly arranged elements in the left or in the right visual hemifield. As expected, the detection accuracy was higher for contours presented to the left visual field/right hemisphere. This difference was absent in two control conditions where the smoothness of the contour was decreased. The results demonstrate that the contour detection, often considered to be driven by lateral coactivation in primary visual cortex, relies on higher-level visual representations that differ between the hemispheres. Furthermore, because contour and non-contour stimuli had the same spatial frequency spectra, the results challenge the view that the right-hemisphere advantage in global processing depends on a specialization for processing low spatial frequencies.

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