PARTICULARITIES OF DIVERSE EGG DEPOSITION PHENOMENA CHARACTERIZING CARNIVOROID HYMENOPTERA (WITH MORPHOLOGICAL AND PHYSIOLOGICAL CORRELATIONS)

1973 ◽  
Vol 105 (9) ◽  
pp. 1175-1187 ◽  
Author(s):  
S. E. Flanders
Keyword(s):  
Sex Differentiation ◽  
The Body ◽  
Larval Stages ◽  
Egg Deposition ◽  
First Instar ◽  
Haploid Male ◽  
Mode Of Life ◽  
Specific Organ ◽  
The Moment ◽  
The Individual

AbstractEntomophagous carnivoroids, especially those in which the development of the individual (ontogeny) is effected by its subsistence on the body fluids and the flesh of one host individual, show an extreme diversity in form and habit whereby their embryonic and larval stages are adapted for a highly specialized mode of life.One of the more interesting of these adaptations is exhibited by biparental species of Hymenoptera in the placement of their haploid and diploid eggs in a particular organ or tissue of the host species. This adaptation may or may not be correlated with sex differentiation in host relations, a reproductive habit characterized either by differing oviposition responses that segregate haploid (male) and diploid (female) eggs to different kinds of hosts or, lacking such responses, by differing developmental mechanisms that segregate first instar males from first instar females.The available information regarding the occurrence of the obligatory associations between the hymenopterous egg and a specific organ or tissue of the host, their characteristics, and pertinent physiological prerequisites are summarized.Basically, these associations appear to be dependent on (1) the gravid carnivoroid usually being free of any physiological pressure (or urge) to oviposit despite the presence of eggs ready for deposition in the ovary and/or stored in the oviduct and (2) the limitation of egg deposition to the moment when the tip of the female’s ovipositor makes contact with a host or the spoor of the host. Freedom from oviposition pressure derives from the female’s ability to dispose of her "ripe" ovarian eggs by methods other than deposition, that is, either by storage in enlarged oviducts or by resorption into the bloodstream.

Biology, morphology and anatomy of aphidophagous syrphid larvae

Parasitology ◽  
1939 ◽  
Vol 31 (1) ◽  
pp. 78-120 ◽  
Author(s):  
Madan Lal Bhatia
Keyword(s):  
Comparative Morphology ◽  
The Body ◽  
Individual Species ◽  
Larval Stages ◽  
The Third ◽  
Third Stage ◽  
Mode Of Life ◽  
Pass Through ◽  
The Individual ◽  
Syrphid Larvae

The paper deals with the biology, morphology and anatomy of seven species of syrphid larvae viz. Syrphus luniger Meig., S. balteatus De Greer, S. ribesii Linne, Catabomba pyrastri Linne, Sphaerophoria flavicauda Zett., Sph. scripta Linne, and Platychirus scutatus Meig.The habitat, mode of progression, aphidophagous habits and characteristic coloration are described for each species.It is shown that the larvae of all the above species, like larvae of other cyclorrhaphous Diptera, definitely pass through three stages separated by two moults. The mode of dehiscence of the puparium is described briefly.Each of the species, except Catabomba pyrastri, has three generations in the breeding season which lasts from May to October. Platychirus scutatus hibernates only in the larval stage, but the other species may be found in both the larval and pupal stages during the winter.The larvae of all the above species, except Syrphus balteatus, are commonly parasitized by ichneumonid larvae.The morphology of the egg, the three larval stages and the puparium of S. luniger is described in detail.The characters common to the third stage larvae of all the species dealt with are summarized and short descriptions of the third stage larvae and puparia of the individual species are given. The general appearance of the living larvae and details of the buccopharyngeal armature, spiracles and puparia of each of the species is represented in figures.In connexion with the pupae a number of new structures are described and it is suggested that some of them are concerned with the formation of the characteristic shape of the puparium and with the dehiscence of the puparium.Internal pupal spiracles are present in all the species dealt with, but external pupal spiracles are present only in Platychirus scutatus.The anatomy of P. scutatus is described and figured, an account being given of all the structures except the musculature of the body wall. Study of the anatomy affords evidence as to the carnivorous mode of life of the larvae and also indicates that the larvae have evolved from aquatic forms.The comparative morphology of the Syrphinae is discussed with respect to the relationship of the Syrphinae to other Aschiza and to the cyclorrhaphous Diptera.

scholarly journals Cerebral and gonadal aromatase expressions are differently affected during sex differentiation of Pleurodeles waltl

2004 ◽  
Vol 33 (3) ◽  
pp. 717-727 ◽  
Author(s):  
Sandra Kuntz ◽  
Amand Chesnel ◽  
Stéphane Flament ◽  
Dominique Chardard
Keyword(s):  
Sex Differentiation ◽  
Temperature Sensitive ◽  
Aromatase Activity ◽  
Gonadal Differentiation ◽  
Aromatase Expression ◽  
Larval Stages ◽  
Exon 1 ◽  
The Individual ◽  
Pleurodeles Waltl ◽  
The Brain

In vertebrates, sex is determined essentially by two means, genetic factors located on sex chromosomes and epigenetic factors such as temperature experienced by the individual during development. Steroids, especially estrogens, are clearly involved in gonadal differentiation in non-mammalian vertebrates. In this regard, the expression of the estrogen-producing enzyme, aromatase, has been shown to be temperature-sensitive in species where temperature can reverse sex differentiation, especially in our model, the amphibian Pleurodeles waltl. We investigated here the regulation of aromatase expression in the brain during sex differentiation in Pleurodeles. We first isolated a brain isoform of aromatase mRNA which differs in its 5′ untranslated region from the isoform previously isolated from adult gonads. In adult Pleurodeles, the brain isoform is mainly expressed in brain tissue while the other isoform is gonad specific. Thus, regulation of aromatase expression in P. waltl could occur by alternative splicing of non-coding exon 1 as previously described in mammals. We then investigated aromatase expression in the brain of male and female larvae and found no differences with regard to sex. Measures of aromatase activity in the brain also showed no differences between sexes at larval stages whereas activity markedly increases in the ovary concomitant with the start of gonadal differentiation. These results support the hypothesis that aromatase could be a target of a temperature-sensitive sex-reversing effect in the gonads but not in the brain.

The spatial relationship between the musculature and the 5-HT and FMRFamide immunoreactivities in cercaria, metacercaria and adult Opisthorchis felineus (Digenea)

2010 ◽  
Vol 55 (2) ◽  
Author(s):  
Oleg Tolstenkov ◽  
Nadezhda Terenina ◽  
Elena Serbina ◽  
Margaretha Gustafsson
Keyword(s):  
Nervous System ◽  
Body Wall ◽  
General Pattern ◽  
Spatial Relationship ◽  
The Body ◽  
Muscle Fibres ◽  
Neuromuscular System ◽  
Opisthorchis Felineus ◽  
Larval Stages ◽  
The Individual

AbstractThe organisation of the neuromuscular system in cercariae, metacercariae and adult Opisthorchis felineus was studied. The patterns of nerves immunoreactive (IR) to antibodies towards serotonin (5-HT) and FMRFamide are described in relation to the musculature, stained with TRITC-conjugated phalloidin. The general organisation of the musculature in the body wall, suckers, pharynx, intestine and sphincter of the excretory pore remains the same from the larval stages to the adult worms. However, the diameter of the individual muscle fibres increases distinctly in the adult worms. The general pattern of 5-HT IR fibres in cercariae, metacercariae and adult O. felineus remains the same. Despite the large increase in body size, the number of 5-HT IR neurones remains almost the same in the cercariae and metacercariae and only a modest increase in number of neurones was observed in the adult worms. Thus the proportion of 5-HT IR neurones/body mass is greatest in the actively moving cercariae. Anti-FMRFamide stains the nervous system strongly.

scholarly journals The Pathological Effects of Phthirus pubis

Parasitology ◽  
1918 ◽  
Vol 10 (3) ◽  
pp. 375-382 ◽  
Author(s):  
George H. F. Nuttall
Keyword(s):  
Skin Irritation ◽  
The Body ◽  
Negative Results ◽  
Febrile Condition ◽  
Infective Disease ◽  
Specific Sign ◽  
Altered Blood ◽  
The Moment ◽  
The One ◽  
The Individual

Phthirus pubis is not known to serve as a vector of any infective disease.The pathological effects of its parasitism on man are on the whole of slight degree. Some persons are more sensitive than others to its presence; on the one hand the louse may produce no reaction by its bite or it may be tolerated upon the person for years, on the other hand it may induce pruritus of a more or less severe character, especially in parts of the body that are most infested and where the skin is most delicate, i.e. about the genitalia, the axillae, and eyelids. All grades of pruritus are observable, scratching of which the individual is unconscious may occur, or in the severest cases the scratching goes on day and night, so that by day it may be evident to spectators and aid in diagnosis. The scratching may only begin from the moment when a person realizes that he is infested.The pale bluish-grey maculae are a specific sign of the presence of Phthirus upon man, but they are not always present. They are induced by the adult louse, are few in number, painless, deep seated, do not disappear on pressure, and measure 0·2–3 cm. in diameter. The maculae mark the site of the insect's bite; they appear 8–24 hours after the louse commences to feed on the spot affected. The bites of P. humanus do not produce maculae caeruleae. The salivary glands of Phthirus and Pediculus give correspondingly positive and negative results when inoculated subcutaneously. The maculae disappear usually within a week after the removal of the offending parasite, and they disappear more rapidly when the skin is irritated. The nature of the maculae remains to be determined, they may be due to extravasated and altered blood.Apart from the maculae, Phthirus, like P. humanus, fleas and mosquitoes, may cause a febrile condition owing to skin irritation, although this appears to be rare; with the removal of the lice, the fever promptly subsides. Papular eruptions and eczematous inflammation may supervene upon the presence of the louse, but they appear to be largely due to the added insult of scratching the infested skin. The melanism is of non-specific origin, being due to continued scratching which leads to hyperaemia, pigmentation and desquamation. The lesions induced thereby may lead to secondary skin infection with pyogenic bacteria.

scholarly journals Perbedaan kadar hemoglobin pada mahasiswa Fakultas Kedokteran Universitas Sam Ratulangi berdasarkan kualitas tidur

e-CliniC ◽  
2016 ◽  
Vol 4 (2) ◽  
Author(s):  
Lillian Sarjono ◽  
Karel Pandelaki ◽  
Jeffry Ongkowijaya
Keyword(s):  
Biological Process ◽  
Medical Faculty ◽  
The Body ◽  
Human Beings ◽  
Quality Of Sleep ◽  
Cross Sectional ◽  
Quality Sleep ◽  
The Moment ◽  
The Individual

Abstract: Sleep is defined as a subconscious condition when the individual may be arose from sleep by giving him or her with stimulation which is a crucial process for human beings in the formation of new body cells, the improvement of damaged cells, and to maintain the balance of body metabolism and biochemistry. The quality of sleep described by less time of sleep have impact on the body, as biological process taking place at the moment of sleep would be disturbed. One of them is disturbance in the formation of hemoglobin in which a change shall be occurring where the content of hemoglobin is lower than its normal value. This study is analytical descriptive using a cross-sectional approach. Of 78 samples under study, the good quality sleep is 7 persons (9.0%) and the bad is 71 persons (91.0%). Normal content of hemoglobin is 40 person (51.3%) and abnormal is 38 persons (48,7%). The good quality sleep and normal content of hemoglobin is 4 persons (57.1%) and abnormal is 3 persons (42.9%). The bad quality sleep and normal content of hemoglobin is 36 persons (50.77%) and abnormal is 35 persons (49.3%). Conclusion: Most of students at Faculty of Medicine, Sam Ratulangi University, have bad quality sleep and normal content of hemoglobin. There are no differences between the content of hemoglobin from the 5th semester student in Medical Faculty student with who has good and bad sleep quality.Keywords: quality of sleep, hemoglobin Abstrak: Tidur didefinisikan sebagai suatu keadaan bawah sadar saat orang tersebut dapat dibangunkan dengan pemberian ransangan yang juga merupakan proses yang sangat dibutuhkan manusia untuk pembentukan sel-sel tubuh yang baru, perbaikan sel-sel tubuh yang rusak maupun untuk menjaga keseimbangan metabolisme dan biokimiawi tubuh. Kualitas tidur yang digambarkan dengan waktu tidur yang kurang akan membawa dampak bagi tubuh karena proses biologis yang terjadi saat tidur akan ikut terganggu. Salah satunya adalah pembentukan kadar hemoglobin yang terganggu dimana akan terjadi perubahan dimana kadar hemoglobin menjadi lebih rendah dari nilai normalnya. Penelitian ini bersifat deskriptif-analitik dengan pendekatan potong lintang. Dari 78 sampel pemelitian, kualitas tidur yang baik sebanyak 7 orang (9,0 %) dan yang buruk sebanyak 71 orang (91,0 %). Kadar hemoglobin normal sebanyak 40 orang (51,3 %) dan tidak normal sebanyak 38 orang (48,7 %). Kualitas tidur baik dengan kadar hemoglobin normal adalah 4 orang (57,1 %) dan kadar hemoglobin tidak normal adalah 3 orang (42,9 %). Kualitas tidur buruk dengan kadar hemoglobin normal adalah 36 orang (50,7 %) dan kadar hemoglobin tidak normal adalah 35 orang (49,3 %). Simpulan: Sebaigan besar mahasiswa Fakultas Kedokteran Unsrat mempunyai kualitas tidur yang buruk dan mempunyai kadar hemoglobin yang normal. Tidak terdapat perbedaan kadar hemoglobin pada mahasiswa semester 5 Fakultas Kedokteran Unsrat dengan kualitas tidur yang baik dan yang buruk. Kata kunci: kualitas tidur, hemoglobin

Influence of stable iodine on the uptake of the thyroid – model vs. experiment

2001 ◽  
Vol 40 (01) ◽  
pp. 31-37 ◽  
Author(s):  
U. Wellner ◽  
E. Voth ◽  
H. Schicha ◽  
K. Weber
Keyword(s):  
Time Course ◽  
Compartment Model ◽  
The Body ◽  
Iodine Uptake ◽  
Model Calculations ◽  
Physiological Conditions ◽  
Iodine Supply ◽  
Predicted Values ◽  
The Individual ◽  
Stable Iodine

Summary Aim: The influence of physiological and pharmacological amounts of iodine on the uptake of radioiodine in the thyroid was examined in a 4-compartment model. This model allows equations to be derived describing the distribution of tracer iodine as a function of time. The aim of the study was to compare the predictions of the model with experimental data. Methods: Five euthyroid persons received stable iodine (200 μg, 10 mg). 1-123-uptake into the thyroid was measured with the Nal (Tl)-detector of a body counter under physiological conditions and after application of each dose of additional iodine. Actual measurements and predicted values were compared, taking into account the individual iodine supply as estimated from the thyroid uptake under physiological conditions and data from the literature. Results: Thyroid iodine uptake decreased from 80% under physiological conditions to 50% in individuals with very low iodine supply (15 μg/d) (n = 2). The uptake calculated from the model was 36%. Iodine uptake into the thyroid did not decrease in individuals with typical iodine supply, i.e. for Cologne 65-85 μg/d (n = 3). After application of 10 mg of stable iodine, uptake into the thyroid decreased in all individuals to about 5%, in accordance with the model calculations. Conclusion: Comparison of theoretical predictions with the measured values demonstrated that the model tested is well suited for describing the time course of iodine distribution and uptake within the body. It can now be used to study aspects of iodine metabolism relevant to the pharmacological administration of iodine which cannot be investigated experimentally in humans for ethical and technical reasons.

Ayurveda dietary guidelines during Covid-19 Pandemic

2020 ◽  
Vol 11 (SPL1) ◽  
pp. 1477-1481
Author(s):  
Ishwari Gaikwad ◽  
Priyanka Shelotkar
Keyword(s):  
Dietary Habits ◽  
Relevant Literature ◽  
Dietary Guidelines ◽  
The Body ◽  
Daily Regimen ◽  
Web Page ◽  
Healthy State ◽  
Health Disorders ◽  
The Individual ◽  
The Right

The current world situation is both frightening and alarming due to the massive disruption caused by the Covid-19 pandemic. The next few days are censorious as we need to be very precautious in our daily regimen as well as dietary habits. Ayurveda offers knowledge about food based on certain reasoning. Indecent food custom is the chief cause for the rising development of health disorders in the current era. In classical texts of Ayurveda, the concept of diet explained well, ranging from their natural sources, properties and specific utility in pathological as well as physiological manner. In this work, the review of the relevant literature of Ahara (Diet) was carried out from Charak Samhita and other texts, newspapers, articles, web page related to the same.  Every human being is unique with respect to his Prakriti (Physical and mental temperament), Agni (Digestive capacity), Koshtha  (Nature of bowel) etc. For that reason, the specificity of the individual should be kept in mind. Ahara, when consumed in the appropriate amount at the right moment following all Niyamas (Guidelines) given in Ayurveda texts, gives immunity and keeps the body in a healthy state during pandemics such as Covid-19. Ultimately, this will help the human body to maintain its strength for life. This article reviews the concept of diet viz. combination of foods, their quantity and quality, methods of preparation and processing, which are to be followed during pandemics and are essential in maintenance and endorsement of health and preclusion of diseases.

Physiological and Hereditary Hyperbilirubinemia in Athletes: Role in Reducing Efficiency and Correction Methodology

2020 ◽  
Vol 5 (5) ◽  
pp. 386-393
Author(s):  
L. M. Gunina ◽  
◽  
Kazys Mylashyus ◽  
Voitenko V. L. ◽  
◽  
...  
Keyword(s):  
Physical Activity ◽  
Functional State ◽  
Oxygen Demand ◽  
Diagnostic Algorithm ◽  
Drug Prevention ◽  
The Body ◽  
Erythrocyte Membranes ◽  
Pharmacological Agents ◽  
Bilirubin Metabolism ◽  
The Individual

Under high-intensity loads, the athlete's bodies take place a number of biochemical reactions and physiological processes that can lead to hyperbilirubinemia. The factors that can initiate the onset of this phenomenon include the syndrome of micro-damage muscle, violation of the integrity of erythrocyte membranes, decreased blood pH, malnutrition and increase oxygen demand of the body. Degree of expression of manifestations of physiological bilirubinemia depends on the level of adaptation of the athlete to the physical activities offered. Hyperbilirubinemia in athletes can be one of the components of the deterioration of the functional state, forming the symptoms of endogenous intoxication. The relevance of this problem in sport lies in the relatively low detection rate of hyperbilirubinemia due to the lack of regular screening studies. However, in drawing up a plan of nutritional- metabolic support for training and competitive activity and recovery measures, must not only the individual reaction of the athlete body to physical activity, but also the severity of shifts in the indicators of bilirubin metabolism and their ratio. The article describes the reasons for the increase in bilirubin levels, which can be caused by both the effect of physical activity and by the presence of pathological processes in athletes. The factors influencing the blood serum’s bilirubin content are also highlighted, which include the state of erythrocyte cell membranes and the rate of hemoglobin destruction, the functional state of the liver, the specifics of physical loads and the use of ergogenic pharmacological agents by athletes. Particular accent has been placed on the illumination of hereditary hyperbilirubinemias, which may have been detected at the stage of selection of athletes. The most common phenomenon is Gilbert's syndrome, which occurs in 2-5% of cases in the general population, is characterized in the clinic by a benign flow and is manifested by episodes of jaundice and an increase in total bilirubin content to moderate values due to indirect. The frequency of detection of hyperbilirubinemias in the population of athletes is 4.68%, among which Gilbert's disease accounts for almost half (48.7%). Conclusion. The work highlighted the pathogenesis and diagnostic algorithm of Gilbert's disease, and also emphasized that its drug prevention and correction in athletes to maintain functional and physical fitness should be carried out taking into account anti-doping rules, which requires upon diagnosis timely receipt of a therapeutic exclusion

Erfahrung ohne Erfahrenden

2009 ◽  
Vol 2009 (1) ◽  
pp. 61-78
Author(s):  
Petr Kouba
Keyword(s):  
Phenomenological Approach ◽  
Work Of Art ◽  
New Beginning ◽  
Individual Structure ◽  
The World ◽  
Il Y A ◽  
Individual Existence ◽  
The Moment ◽  
The Individual ◽  
Intentional Structure

This article examines the limits of Heidegger’s ontological description of emotionality from the period of Sein und Zeit and Die Grundbegriffe der Metaphysik along the lines outlined by Lévinas in his early work De l’existence à l’existant. On the basis of the Lévinassian concept of “il y a”, we attempt to map the sphere of the impersonal existence situated out of the structured context of the world. However the worldless facticity without individuality marks the limits of the phenomenological approach to human existence and its emotionality, it also opens a new view on the beginning and ending of the individual existence. The whole structure of the individual existence in its contingency and finitude appears here in a new light, which applies also to the temporal conditions of existence. Yet, this is not to say that Heidegger should be simply replaced by Lévinas. As shows an examination of the work of art, to which brings us our reading of Moravia’s literary exposition of boredom (the phenomenon closely examined in Die Grundbegriffe der Metaphysik), the view on the work of art that is entirely based on the anonymous and worldless facticity of il y a must be extended and complemented by the moment in which a new world and a new individual structure of experience are being born. To comprehend the dynamism of the work of art in its fullness, it is necessary to see it not only as an ending of the world and the correlative intentional structure of the individual existence, but also as their new beginning.

Differenzierungen im Begriff, Gegenwart‘ bei Husserl und Merleau-Ponty

2017 ◽  
Vol 2017 (1) ◽  
pp. 39-54
Author(s):  
Jörg Zimmer
Keyword(s):  
Modern Philosophy ◽  
The Body ◽  
Fundamental Concept ◽  
Phenomenological Description ◽  
Philosophy Of Time ◽  
Phenomenology Of Perception ◽  
The World ◽  
Classical Philosophy ◽  
The Moment ◽  
Empty Time

In classical philosophy of time, present time mainly has been considered in its fleetingness: it is transition, in the Platonic meaning of the sudden or in the Aristotelian sense of discreet moment and isolated intensity that escapes possible perception. Through the idea of subjective constitution of time, Husserl’s phenomenology tries to spread the moment. He transcends the idea of linear and empty time in modern philosophy. Phenomenological description of time experience analyses the filled character of the moment that can be detained in the performance of consciousness. As a consequence of the temporality of consciousness, he nevertheless remains in the temporal conception of presence. The phenomenology of Merleau-Ponty, however, is able to grasp the spacial meaning of presence. In his perspective of a phenomenology of perception, presence can be understood as a space surrounding the body, as a field of present things given in perception. Merleau-Ponty recovers the ancient sense of ‘praesentia’ as a fundamental concept of being in the world.

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