scholarly journals On the question of the peripheral innervation of the rectum. Critical and experimental research

2021 ◽  
Vol XII (1) ◽  
pp. 1-57
Author(s):  
A. V. Vishnevskiy
Keyword(s):  
Experimental Research ◽  
Negative Pressure ◽  
External Sphincter ◽  
Peripheral Innervation ◽  
Simultaneous Registration ◽  
Spinal Roots ◽  
In The Beginning

All experiments were made by you 56. Of these, 10 experiments with negative pressure, 8 experiments with double registration (according to Courtade and Guyon` y), 15 with simultaneous registration of three bowel sections (colonis, recti and sphinct. Inter.), 4 experiments with irritation spinal roots, 2 experiments for examining the external sphincter. The remaining 17 embrace the usual experiments of investigating the movements of the recti under the influence of the irritated intestinal nerves according to the method indicated by us in the beginning of our work; this also included 5 experiments with combined irritations n. erigentis and n. hypogastrici.

Behavior of clayey soils on drying–wetting paths

1993 ◽  
Vol 30 (2) ◽  
pp. 287-296 ◽  
Author(s):  
Jean-Marie Fleureau ◽  
Siba Kheirbek-Saoud ◽  
Ria Soemitro ◽  
Said Taibi
Keyword(s):  
Experimental Research ◽  
Negative Pressure ◽  
Unsaturated Soils ◽  
Liquid Limit ◽  
The Other ◽  
Clayey Soils ◽  
Initial State ◽  
Stress Increase ◽  
Negative Pressures ◽  
Clayey Materials

Experimental research was carried out on 11 different clayey materials to determine the main characteristics of the drying and wetting paths and the influence of initial state and other factors. Normally consolidated paths are shown to have a large saturated domain, in which a negative pressure is equivalent to an isotropic stress increase; such paths can be derived from correlations with the liquid limit. On the other hand, the behavior of overconsolidated or dried samples is largely dependent on the range of stresses and negative pressures. Key words : suction, unsaturated soils, drying, wetting, correlations, models.

Theoretical and Experimental Research on Sequential RPP Manipulator

2014 ◽  
Vol 1036 ◽  
pp. 726-731
Author(s):  
Constantin Ovidiu Ilie ◽  
Dănuț Grosu ◽  
Oana Mocian ◽  
Florin Constantin-Oloeriu ◽  
Valentin Vânturiș
Keyword(s):  
Experimental Research ◽  
Characteristic Point ◽  
Type System ◽  
Simulation Software ◽  
Industrial Robots ◽  
Driving System ◽  
End Effectors ◽  
In The Beginning ◽  
And Control ◽  
Command And Control System

The paper deals with the analysis of a RPP sequential manipulator designed to be used for handling different loads, bringing them to a preset position. This manipulator is used to automating the store and transfer loads for improving working condition, avoid using human operations that require low-skills and reducing the risk of accidents. In the beginning, we performed a structural analysis of the manipulator. It has all the features of any industrial robots. Afterwards, we carried out a study of kinematics and dynamics for this RPP manipulator, using a simulation software package. The simulation results can be used for various purposes such as: trajectory calculation of characteristic point depending of variable couplings; determining whether to change the parameters of particular joint for achieving a certain trajectory of characteristic point; finding the force needed in joints to achieve a certain end-effectors trajectory; finding the kinematics of joint according to the driving force. This study is necessary to command and control system in order to obtain the desired motion. It also allows the choice of actuators of the manipulators. An experimental research was further conducted with the main goal to determine the motion law for the manipulator cinematic joints. We used Hottinger equipment consisting of transducers, amplifiers and a computer, using a parallel connection, data acquisition, type system. Eventually, with respect to the simulation and experimental research, we provide an algorithm for analyzing a sequential manipulator. It can be used to determine the forces that should act within the cinematic joints in order to get a certain trajectory of a characteristic point (that allows choosing the driving system during the design phase of manipulators or checking the driving system if the manipulator is already manufactured).

Human Neurofibromas in Co-Culture with Mouse Neurons

1982 ◽  
Vol 40 ◽  
pp. 194-195
Author(s):  
R.L. Martuza ◽  
T. Liszczak ◽  
A. Okun ◽  
T-Y Wang
Keyword(s):  
Schwann Cell ◽  
Schwann Cells ◽  
Genetic Disorder ◽  
Cranial Nerves ◽  
Sympathetic Nerves ◽  
Acoustic Neuromas ◽  
Spinal Roots ◽  
Neural Crest Origin ◽  
Multiple Abnormalities ◽  
Other Neoplasms

Neurofibromatosis (NF) is an autosomal dominant genetic disorder with a prevalence of 1/3,000 births. The NF mutation causes multiple abnormalities of various cells of neural crest origin. Schwann cell tumors (neurofibromas, acoustic neuromas) are the most common feature of neurofibromatosis although meningiomas, gliomas, and other neoplasms may be seen. The schwann cell tumors commonly develop from the schwann cells associated with sensory or sympathetic nerves or their ganglia. Schwann cell tumors on ventral spinal roots or motor cranial nerves are much less common. Since the sensory neuron membrane is known to contain a mitogenic factor for schwann cells, we have postulated that neurofibromatosis may be due to an abnormal interaction between the nerve and the schwann cell and that this interaction may be hormonally modulated. To test this possibility a system has been developed in which an enriched schwannoma cell culture can be obtained and co-cultured with pure neurons.

Drug Induced Changes in Cell Organelles

1968 ◽  
Vol 26 ◽  
pp. 110-111
Author(s):  
Sarah A. Luse
Keyword(s):  
Clinical Medicine ◽  
Cell Organelles ◽  
Riboflavin Deficiency ◽  
Drug Induced ◽  
New Era ◽  
Health And Disease ◽  
In The Beginning ◽  
Cellular Pathology ◽  
Induced Changes ◽  
The Impact

In the mid-nineteenth century Virchow revolutionized pathology by introduction of the concept of “cellular pathology”. Today, a century later, this term has increasing significance in health and disease. We now are in the beginning of a new era in pathology, one which might well be termed “organelle pathology” or “subcellular pathology”. The impact of lysosomal diseases on clinical medicine exemplifies this role of pathology of organelles in elucidation of disease today.Another aspect of cell organelles of prime importance is their pathologic alteration by drugs, toxins, hormones and malnutrition. The sensitivity of cell organelles to minute alterations in their environment offers an accurate evaluation of the site of action of drugs in the study of both function and toxicity. Examples of mitochondrial lesions include the effect of DDD on the adrenal cortex, riboflavin deficiency on liver cells, elevated blood ammonia on the neuron and some 8-aminoquinolines on myocardium.

A View of the Lexical–Grammatical Link in Young Latinos With Specific Language Impairment Using Language-Specific and Conceptual Measures

2019 ◽  
Vol 62 (6) ◽  
pp. 1775-1786 ◽  
Author(s):  
Lucía I. Méndez ◽  
Gabriela Simon-Cereijido
Keyword(s):  
Low Income ◽  
Language Impairment ◽  
Specific Language Impairment ◽  
L2 Acquisition ◽  
Cross Sectional ◽  
Specific Language ◽  
Vocabulary Skills ◽  
In The Beginning ◽  
Study Participants ◽  
L1 And L2

Purpose This study investigated the nature of the association of lexical–grammatical abilities within and across languages in Latino dual language learners (DLLs) with specific language impairment (SLI) using language-specific and bilingual measures. Method Seventy-four Spanish/English–speaking preschoolers with SLI from preschools serving low-income households participated in the study. Participants had stronger skills in Spanish (first language [L1]) and were in the initial stages of learning English (second language [L2]). The children's lexical, semantic, and grammar abilities were assessed using normative and researcher-developed tools in English and Spanish. Hierarchical linear regressions of cross-sectional data were conducted using measures of sentence repetition tasks, language-specific vocabulary, and conceptual bilingual lexical and semantic abilities in Spanish and English. Results Results indicate that language-specific vocabulary abilities support the development of grammar in L1 and L2 in this population. L1 vocabulary also contributes to L2 grammar above and beyond the contribution of L2 vocabulary skills. However, the cross-linguistic association between vocabulary in L2 and grammar skills in the stronger or more proficient language (L1) is not observed. In addition, conceptual vocabulary significantly supported grammar in L2, whereas bilingual semantic skills supported L1 grammar. Conclusions Our findings reveal that the same language-specific vocabulary abilities drive grammar development in L1 and L2 in DLLs with SLI. In the early stages of L2 acquisition, vocabulary skills in L1 also seem to contribute to grammar skills in L2 in this population. Thus, it is critical to support vocabulary development in both L1 and L2 in DLLs with SLI, particularly in the beginning stages of L2 acquisition. Clinical and educational implications are discussed.

Secondary Transfer Effect of Contact

2009 ◽  
Vol 40 (2) ◽  
pp. 55-65 ◽  
Author(s):  
Thomas F. Pettigrew
Keyword(s):  
Cognitive Dissonance ◽  
Experimental Research ◽  
Intergroup Contact ◽  
Transfer Effect ◽  
Evaluative Conditioning ◽  
Transfer Effects ◽  
Secondary Transfer ◽  
Primary Reduction

This paper reviews the evidence for a secondary transfer effect of intergroup contact. Following a contact’s typical primary reduction in prejudice toward the outgroup involved in the contact, this effect involves a further, secondary reduction in prejudice toward noninvolved outgroups. Employing longitudinal German probability samples, we found that significant secondary transfer effects of intergroup contact exist, but they were limited to specific outgroups that are similar to the contacted outgroup in perceived stereotypes, status or stigma. Since the contact-prejudice link is bidirectional, the effect is inflated when prior prejudice reducing contact is not controlled. The strongest evidence derives from experimental research. Both cognitive (dissonance) and affective (evaluative conditioning) explanations for the effect are offered.

In the Beginning Was Aggression

1980 ◽  
Vol 25 (6) ◽  
pp. 462-463
Author(s):  
NORMAN A. MILGRAM
Keyword(s):  
In The Beginning
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