EFFECT OF SEVERE COLD (−5 °C) ON THE ENDOCRINE FUNCTION OF THE TESTIS IN THE ALBINO RAT

1962 ◽  
Vol 40 (1) ◽  
pp. 1717-1724
Author(s):  
M. J. Perrault ◽  
L. P. Dugal
Keyword(s):  
Cold Exposure ◽  
Morphological Characteristics ◽  
Time Limit ◽  
Endocrine Function ◽  
Morphological Data ◽  
Male Rat ◽  
Albino Rat ◽  
Organ Weights ◽  
Histological Appearance ◽  
Physiological Information

Cryptorchism, caused surgically, and cold exposure have been studied separately and in combination: the morphological characteristics, organ weights, and histological appearance of the testes and of the main sexual accessories have been evaluated. Physiological information derived from morphological data reveals that the effect of cold is twofold: (a) somatic or non-endocrine and (b) purely endocrine; the two effects are superimposed and additive, but distinct. Thus, the gonadal response of the male rat to cold, within the time limit of the present investigation, assumes the appearance of a "physiological castration".

EFFECT OF SEVERE COLD (−5 °C) ON THE ENDOCRINE FUNCTION OF THE TESTIS IN THE ALBINO RAT

1962 ◽  
Vol 40 (12) ◽  
pp. 1717-1724 ◽  
Author(s):  
M. J. Perrault ◽  
L. P. Dugal
Keyword(s):  
Cold Exposure ◽  
Morphological Characteristics ◽  
Time Limit ◽  
Endocrine Function ◽  
Morphological Data ◽  
Male Rat ◽  
Albino Rat ◽  
Organ Weights ◽  
Histological Appearance ◽  
Physiological Information

Cryptorchism, caused surgically, and cold exposure have been studied separately and in combination: the morphological characteristics, organ weights, and histological appearance of the testes and of the main sexual accessories have been evaluated. Physiological information derived from morphological data reveals that the effect of cold is twofold: (a) somatic or non-endocrine and (b) purely endocrine; the two effects are superimposed and additive, but distinct. Thus, the gonadal response of the male rat to cold, within the time limit of the present investigation, assumes the appearance of a "physiological castration".

scholarly journals First bioacoustic and morphological data for the presence of Pelophylax bedriagae in Bulgaria

2018 ◽  
Vol 5 (1) ◽  
pp. 54-63
Author(s):  
Simeon Lukanov ◽  
Georgi Popgeorgiev ◽  
Nikolay Tzankov
Keyword(s):  
Morphological Characteristics ◽  
Morphological Data ◽  
Marsh Frog ◽  
Water Frog ◽  
Pelophylax Ridibundus ◽  
Mating Calls ◽  
The Town ◽  
Pelophylax Bedriagae ◽  
Made In

AbstractWater frog mating calls from two localities were studied and analyzed. Recordings were made in the summer of 2010 at the Arkutino swamp near the town of Primorsko and at the Vurbitza River near the town of Momchilgrad. A total of 154 calls were analyzed and the results suggested the presence of both the Marsh frog (Pelophylax ridibundus) and the Levant frog (Pelophylax bedriagae) in both sites, with the former being more frequent in Vurbitza River, and the latter – in Arkutino. At Vurbitza, we also captured and measured 2 specimens, which morphological characteristics differed from P. ridibundus and matched those of P. bedriagae. These are the first localities for P. bedriagae in Bulgaria.

Euphorbia mongoliensis (Euphorbiaceae), a new species from Inner Mongolia, China

Phytotaxa ◽  
2021 ◽  
Vol 501 (1) ◽  
pp. 151-161
Author(s):  
ER-HUAN ZANG ◽  
MING-XU ZHANG ◽  
WEN-LE WANG ◽  
CHUN-HONG ZHANG ◽  
MIN-HUI LI
Keyword(s):  
New Species ◽  
Geographical Distribution ◽  
Inner Mongolia ◽  
Pollen Morphology ◽  
Morphological Characteristics ◽  
Euphorbia Esula ◽  
Morphological Data ◽  
New Taxon ◽  
Flora Of China ◽  
A New Species

In May 2020, a new taxon of Euphorbia, Euphorbiaceae was collected from a dry hillside of Dongsheng District, Ordos City, Inner Mongolia. The morphological characteristics of the specimens analyzed differ from those of the known Euphorbia species from this region; therefore, we suspected this may be a new species, and we set to analyze the ITS2 sequences of some Euphorbia species. The results show that the new taxon belongs to the sect. Esula of Euphorbia subg. Esula. It is similar to Euphorbia esula (description from Flora of China) but does not belong to the same species. Concomitantly, plant morphological data and pollen morphology results show significant differences between the new taxon, E. esula and E. caesia, a finding that supports the delimitation of this new taxon, which is named Euphorbia mongoliensis in accordance with its geographical distribution.

scholarly journals Study morphology of loquat plants (Eriobotrya Japonica Lindl.) from Karo, Dairi, and Simalungun Districts, North Sumatra

2021 ◽  
Vol 912 (1) ◽  
pp. 012103
Author(s):  
Elimasni ◽  
R A Nasution
Keyword(s):  
Binary Data ◽  
Morphological Characteristics ◽  
Morphological Characters ◽  
Seed Morphology ◽  
Flowering Plant ◽  
Morphological Data ◽  
Eriobotrya Japonica ◽  
Morphological Observation ◽  
Limited Information ◽  
The Public

Abstract Abstrak. Loquat (Eriobotrya japonica Lindl.) is a flowering plant that belongs to the Rosacea family. The loquat has many health benefits. Cultivation and information about loquat plants in Indonesia are still limited, so they are rarely found and known by the public. Limited information and data regarding loquat plants is also an obstacle to the development of loquat plants. Research on loquat plants aims to analyze the morphological characters in three districts, namely, Karo, Dairi, and Simalungun districts. This research was conducted using a descriptive method. The analysis of the morphological characteristics of loquat plants using morphological data scoring into binary data. The similarity between individuals was analyzed using clusters with the NTSYS program version 2.0 with the UPGMA method of the SimQual function. Morphological Observation Results Loquat plants (Eriobotrya japonica Lindl.) in Karo, Dairi, and Simalungun Districts have uniform characters in the morphology of stems, leaves, and flowers. However, the observed fruit and seed morphology showed different characters. Different characters exist in the shape of the fruit and seeds. The morphological similarity level of loquat plants was grouped at a similarity coefficient value of 95%. Clusters I and II have the highest similarity with a coefficient value of 100%. Cluster III has the lowest similarity with a coefficient value of 97%.

The genus Cystoseira s.l. (Ochrophyta, Fucales, Sargassaceae) in the Black Sea: morphological variability and molecular taxonomy of Gongolaria barbata and endemic Ericaria crinita f. bosphorica comb. nov.

Phytotaxa ◽  
2021 ◽  
Vol 480 (1) ◽  
pp. 1-21
Author(s):  
SOFIA S. SADOGURSKA ◽  
JOÃO NEIVA ◽  
ANNALISA FALACE ◽  
ESTER A. SERRÃO ◽  
ÁLVARO ISRAEL
Keyword(s):  
Mediterranean Sea ◽  
Black Sea ◽  
Molecular Taxonomy ◽  
Morphological Variability ◽  
Morphological Characteristics ◽  
Molecular Data ◽  
Morphological Data ◽  
The Black Sea ◽  
Morphological Identification ◽  
Additional Tool

Brown algae of the genus Cystoseira sensu lato form the most diverse and productive marine ecosystems throughout the Mediterranean Sea and have equal roles also in the Black Sea where they have been decreasing in the recent years. The taxonomy of Cystoseira s.l. taxa from the Black Sea is still not well understood, and questions arise when related taxa have to be delimited. In addition to morphological descriptions, this study provides for the first time molecular data of the Black Sea Cystoseira s.l. distinct morphologies as an additional tool to clarify their identities and phylogenetic affinities. The analysis of two mitochondrial markers (cytochrome oxidase subunit 1—COI, and 23S-tRNAVal intergenic spacer—mt-spacer) showed that Cystoseira s.l. specimens from the Black Sea belong to two recently resurrected genera, namely Gongolaria and Ericaria. Molecular data confirm the morphological identification of G. barbata, which is characterized by high morphological plasticity in the Black Sea. The morphological data presented in this study support the transition of G. barbata to the genus Gongolaria, which was previously proposed based solely on genetic data. For the Black Sea endemic taxon C. bosphorica, sequence divergence suggests conspecificity with Mediterranean Sea species E. crinita and E. barbatula. However, considering original morphological characteristics of the taxon, its geographical isolation, and endemism, the new combination Ericaria crinita f. bosphorica comb. nov. is proposed.

scholarly journals TIG Stainless Steel Molten Pool Contour Detection and Weld Width Prediction Based on Res-Seg

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1495
Author(s):  
Yiming Wang ◽  
Jing Han ◽  
Jun Lu ◽  
Lianfa Bai ◽  
Zhuang Zhao
Keyword(s):  
Edge Detection ◽  
Molten Pool ◽  
Morphological Characteristics ◽  
Semantic Segmentation ◽  
Morphological Data ◽  
Generative Adversarial Networks ◽  
Pool Data ◽  
Data Set ◽  
Weld Width ◽  
Detection Algorithms

As the basic visual morphological characteristics of molten pool, contour extraction plays an important role in on-line monitoring of welding quality. The limitations of traditional edge detection algorithms make deep learning play a more important role in the task of target segmentation. In this paper, a molten pool visual sensing system in a tungsten inert gas welding (TIG) process environment is established and the corresponding molten pool image data set is made. Based on a residual network, a multi-scale feature fusion semantic segmentation network Res-Seg is designed. In order to further improve the generalization ability of the network model, this paper uses deep convolutional generative adversarial networks (DCGAN) to supplement the molten pool data set, then performs color and morphological data enhancement before network training. By comparing with other traditional edge detection algorithms and semantic segmentation network, it is verified that the scheme has high accuracy and robustness in the actual welding environment. Moreover, a back propagation (BP) neural network is used to predict the weld width, and a fitting test is carried out for the pixel width of the molten pool and its corresponding actual weld width. The average testing error is less than 0.2 mm, which meets the welding accuracy requirements.

scholarly journals Morphological Assessment of Cultivated and Wild Amaranth Species Diversity

Agronomy ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 272 ◽  
Author(s):  
Ranjita Thapa ◽  
Matthew Blair
Keyword(s):  
Morphological Traits ◽  
Plant Genetic Resources ◽  
Morphological Characteristics ◽  
Germplasm Conservation ◽  
Germplasm Collection ◽  
Flower Color ◽  
Leafy Vegetables ◽  
Morphological Data ◽  
Significant Difference ◽  
Blade Shape

Amaranthus L. is genus of C4 dicotyledonous herbaceous plants comprising approximately 70 species, with three subgenera, which contains both cultivated and wild types, where cultivated ones are used for food grains, leafy vegetables, potential forages and ornamentals. Grain amaranth are pseudocereals from three species domesticated in North and South America and are notable for containing high amount of protein and minerals and balanced amino acid in their small seeds. Genetic diversity analysis of amaranths is important for development of core set of germplasm with widely diverse population and effective utilization of plant genetic resources. In this study, we evaluated a germplasm collection of 260 amaranth accessions from United State Department of Agriculture (USDA) and 33 accessions from Seed Savers’ Exchange (SSE). We evaluated morphological traits like blade pigmentation, blade shape, petiole pigmentation, branching index, flower color, stem color, inflorescence density, inflorescence shape, terminal inflorescence attitude, plant height and yield characteristics across all 293 accessions. We compared clustering within the USDA and SSE collection and across both collections. Data analysis of morphological data showed significant difference of petiole pigmentation, stem color, blade pigmentation, blade shape and flower color across different clusters of accessions of USDA unlike among different clusters of SSE where we found significant difference of only blade pigmentation, blade shape and flower color. The relationship depicted by neighbor-joining dendogram using the morphological markers was consistent with some but not all of the differences observed between species. Some divisions were found between cultivated and weedy amaranths that was substantiated by morphological characteristics but no separation of South and Central American species was observed. Substantial phenotypic plasticity limits the use of morphological analysis for phylogenetic analysis but does show that important morphological traits such as inflorescence type and plant architecture can cross species boundaries. Similarly, color variants for leaves, flowers and seeds are not exclusive to one cluster in our study nor to one species and can be used widely for breeding any of the cultigens, but not to species identification. Our findings will help in germplasm conservation of grain amaranths and facilitate in this crop’s improvement. It will also help on developing effective breeding programs involving different plant characteristics and morphological traits of Amaranths.

Chronic Sodium Chloride Toxicity in the Albino Rat. III. Maturity Characteristics, Survivorship, and Organ Weights

1957 ◽  
Vol 12 (2) ◽  
pp. 182-189 ◽  
Author(s):  
R. G. Tucker ◽  
C. O.T. Ball ◽  
W. J. Darby ◽  
W. R. Early ◽  
R. C. Kory ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Albino Rat ◽  
Organ Weights ◽  
Chloride Toxicity
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