| seasonal changes in energy reserves in the common frog, rana tigrina. | liver glycogen and lipid, ovarian glycogen, and lipid index were used as criteria to elucidate energy changes associated with reproduction and biphasic pattern of dormancy (summer and winter) in the female forg, rana tigrina. liver glycogen showed 2 peaks; the ovarian glycogen showed reciprocal relationship with that of liver. the liver lipid and glycogen showed parallel trend. | 1989 | 2632907 |
| temperature and adrenoceptors in the frog heart. | 1. cardiac adrenergic receptors in a frog, rana tigrina, were examined in winter and summer months using isolated atria preparation maintained at 24 degrees, 14 degrees and 6 degrees c. treatments included an examination of the atrial responses to selective alpha and beta adrenergic agonists (phenylephrine and isoproterenol respectively) and antagonists (phentolamine and propranolol). 2. basal atrial beating rates differed between summer and winter months and increased with temperature. 3. pheny ... | 1989 | 2576728 |
| ultimobranchial body and parathyroid gland of the frog, rana tigrina in response to calcitonin administration. | the effects of salmon calcitonin (0.25 mrc mu/g body wt) on the serum calcium and phosphate levels as well as on the activity of ultimobranchial body and parathyroid glands was investigated in the frog, rana tigrina for 15 days. the hormone evokes hypocalcemia (on day 1 and day 3) which is followed by a significant hypercalcemia on day 10. thereafter, the level of calcium decreases again on day 15. calcitonin induces hypophosphatemia (on day 3 and day 5). thereafter, hyperphosphatemia is recorde ... | 1989 | 2486619 |
| larval energetics of rana tigerina (daud.). | | 1988 | 3397112 |
| physiological correlates of surfacing behaviour--effect of aquarium depth on surfacing, growth and metamorphosis in rana tigrina. | rana tigrina were reared from hatching to metamorphosis in aquaria containing different depths but equal volume of water. to exchange atmospheric air, tadpoles in the shallow aquarium surfaced less frequently, travelled shorter distance at less metabolic energy cost and hence grew larger (3.1 g) at a higher (25%) efficiency than those (2.5 g; 19% efficiency) reared in the deepest aquarium. aquarium depth is a more potent factor than po2 in the regulation of surfacing behaviour. the significant a ... | 1985 | 4095179 |
| effect of photic manipulation on the level of melatonin in the retinas of frogs (rana tigrina regulosa). | the level of melatonin in the frog (rana tigrina regulosa) retina was studied at midlight and middark in a 12l:12d cycle and under different lighting conditions. it was found that the frog displayed a diurnal rhythm of melatonin in the retina with high levels in the dark period. when the animal was subjected to an extended dark period, the level of retinal melatonin was significantly (p less than 0.05) increased. in addition, the normal low level of retinal melatonin in the light period was sign ... | 1985 | 4007481 |
| effects of ionophore a23187 and lanthanum on pepsinogen secretion from frog esophageal mucosa in vitro. | the role of ca2+ in the mediation of pepsinogen secretion from frog esophagus was investigated by means of ionophore a23187 and lacl3. the esophageal mucosa from asian bullfrog rana tigerina was mounted in a double-chamber system to preserve its polarity and was incubated in a medium containing 1.5 mm cacl2. pepsinogen secreted was measured and expressed as % of total. the basal secretion averaged 3.5%/h. bethanechol (25 microm), dibutyryl-camp (10 mm), ionophore a23187 (30 microm) and 3-isobuty ... | 1985 | 2579675 |
| acute and chronic effect of carbaryl on survival, growth, and metamorphosis in the bullfrog (rana tigrina). | | 1983 | 6411006 |
| role of cholinergic receptors in melanophore responses of amphibians. | responses of isolated skin melanophores of rana tigerina and bufo melanostictus to cholinergic drugs were studied using the mean melanophore size index assay to explore the nature and role of cellular receptors in melanophore regulation activity. acetylcholine (ach) in a concentration of 10(-7) to 6.4 x 10(-6) g/ml caused dispersion of the skin melanophores of r. tigerina and b. melanostictus. these effects were blocked by both atropine and hyoscine in a concentration of 8 x 10(-6) g/ml each. es ... | 1995 | 8714764 |
| comparative effects of mast cell degranulators on perfused systemic blood vessels of bufo melanostictus and rana tigrina. | three agents known to induce release of mast cell constituents, viz. polymyxin, compound 48/80 and polysorbate-80, were evaluated for effect on perfused blood vessels of r. tigrina and b. melanostictus. the mast cell degranulators caused vasoconstriction in frog and toad, except that for p-80 whose responses in toad were equivocal. toads showed a general low responsiveness in comparison to frogs. pharmacologic intervention with pheniramine, metergoline, hydergine, atropine and mecamylamine, resp ... | 1992 | 1338198 |
| histochemical study of normal & denervated gastrocnemius muscle of frog rana tigrina & toad bufo melanostictus. | | 1977 | 892871 |
| tyrosine and melanin contents in liver of tadpoles at various stages of development (bufo melanostictus and rana tigrina). | | 1968 | 4972845 |
| blood glucose and pancreatic islets in frogs afer streptozotocin treatment. | as to alloxan, the frog rana tigrina was found to be sensitive to streptozotocin also. an intravenous injection of 200 mg/kg body weight streptozotocin caused a delayed hyperglycemia which returned to normal levels after 120 hrs of the injection. the beta-cells of the endocrine pancreas underwent degranulation and necrosis and the hyperglycemia seems to be due to the deficiency of insulin. there was no visible effect on the alpha-cells, however. unlike alloxan, streptozotocin did not induce neph ... | 1981 | 6458222 |
| 203hg binding in the liver and kidney of the frog, rana tigrina. | following a single i.p. dose of the radioisotope, 203hg was found to accumulate in both the high and low molecular weight (mw) fractions of the kidney and liver of the frog. the course of 203hg appearance in the 2 fractions varied in the liver; 203hg was exclusively associated with the higher mw fractions at 2 days whereas the radiotracer appeared in both low and high mw fractions at 4 and 7 days after administration. in the kidneys, however, 203hg was associated with high and low mw fractions a ... | 1980 | 7423543 |
| effect of testosterone & clomiphene on seminiferous tubules of the indian bull frog rana tigerina (daud) during pre-spawning period. | | 1980 | 7429568 |
| vascular responses to eserine in the frog (rana tigrina). | | 1980 | 7390604 |
| hind limb regeneration capacity in tadpoles of the indian bull frog rana tigerina daud. | | 1980 | 7399594 |
| effects of cyproterone acetate, cyproterone and testosterone on hcg induced spermatogenesis in the indian bullfrog rana tigerina (daud) during postbreeding regression phase. | | 1985 | 2939026 |
| on the action and mechanism of withaferin-a from withania somnifera, a novel and potent melanin dispersing agent in frog melanophores. | the present work was carried out to determine the effects of lyophilized root extracts of withania somnifera along with pure withaferin-a, on the isolated skin melanophores of frog, rana tigerina which are disguised type of smooth muscle cells and offer excellent in vitro opportunities for studying the effects of pharmacological and pharmaceutical agents. the lyophilized extract of w. somnifera and its active ingredient withaferin-a induced powerful dose-dependent physiologically significant mel ... | 2011 | 21848494 |
| absence of kin discrimination in cannibalistic anuran tadpoles of the frog hoplobatrachus tigerinus (daudin). | kin discrimination was tested in the cannibalistic h. tigerinus tadpoles to know whether cannibalism is selectively directed towards non-kin members or it is indiscriminate. the association choice tests were conducted using satiated as well as starved subjects with the assumption that they will associate near non-sibs rather than near sibs with the intention of preferentially cannibalizing them. however, test tadpoles, fed or starved showed a random association choice with sibs and non-sibs, as ... | 2011 | 21615061 |
| histoenzymological analysis of mesencephalic auditory, tegmental and cranial nerve nuclei in the frog (rana tigrina). | the distributions of acid and alkaline phosphatases, 5-nucleotidase, atpase, non-specific esterase, specific cholinesterase, succinic dehydrogenase and beta-galactosidase are described in the mesencephalic auditory, tegmental and cranial nerve nuclei of the frog (rana tigrina). the main results of the study are as follows: the laminar, principal, and magnocellular nuclei of the torus semicircularis, which are associated with auditory functions, show intense activity of specific cholinesterase. o ... | 1978 | 214417 |
| effect of seasonal variations and cold acclimation on serum transaminase activity of common indian frog rana tigrina. | a definite seasonal change is observed in 2 transaminases, sgot and sgpt of r. tigrina. cold acclimation significantly depresses transaminase activity of serum. | 1978 | 720502 |
| tissue catecholamines in rana tigrina and effects of reserpine. | | 1978 | 702951 |
| life history & pesticide susceptible embryonic stages of the indian bull frog rana tigrina daudin. | | 1978 | 568117 |
| interaction of acetylcholine and caffeine on the isolated rectus abdominis of frog (rana tigrina). | | 2014 | 151667 |
| histoenzymological study of the gastrocnemius muscle of the common frog rana tigrina (daud.) during various stages of development. | | 1978 | 680811 |
| hematology of the common indian frog rana tigrina. iii. hemoglobin and hematocrit. | the hemoglobin and hematocrit values studied in two years averaged 6.22 and 3.87 g/100 ml and 31.8 and 19.5 percent in female and male rana tigrina respectively. the peak values in females and males are observed in may and june respectively. the breeding season is characterized by low hemoglobin and hematocrit values. the starvation upto 28 days is observed to cause a decrease in hemoglobin level. | 1978 | 646126 |
| plasma membrane electron transport in frog blood vessels. | in an attempt to see if frog blood vessels possess a plasma membrane electron transport system, the postcaval vein and aorta isolated from rana tigrina were tested for their ability to reduce ferricyanide, methylene blue, and 2,6-dichloroindophenol. while the dyes remained unchanged, ferricyanide was reduced to ferrocyanide. this reduction was resistant to inhibition by cyanide and azide. heptane extraction or formalin fixation of the tissues markedly reduced the capability to reduce ferricyanid ... | 2009 | 20093738 |
| insulin administration in the frog rana tigrina: studies on the blood glucose and the histology of the endocrine pancreas. | the effect of various doses of insulin (25-, 50-, and 150 u/kg body weight) on the blood glucose level and islet-cytology of the frog rana tigrina was studied until 96 h. following the hormonal administration the frogs exhibited hypoglycemia, abnormal neuromuscular activity and degranulation of both the insulin secreting beta- and glucagon secreting alpha-(alpha2-) cells of the pancreatic islets. the action of insulin was dose and temperature dependent; the higher the dose and temperature, the g ... | 1978 | 369939 |
| influence of alloxan administration on the blood glucose, islets of langerhans and some other tissues of the frog, rana tigrina. | like majority of other vertebrates, the frog rana tigrina belongs to the alloxan sensitive group. alloxanization at doses of 300 and 500 mg/kg caused selective degenerative changes in the pancreatic beta-cells and a deficiency of insulin, which, in turn, provoked elevation of normal plasma glucose levels. the alpha-cells retained their normal structure. with the lower dose (200 mg/kg), however, many islets remained unaffected and there was no hyperglycemia. the fatal effect of alloxan on rana ti ... | 1978 | 356673 |
| chemoarchitectonics of the optic tectum of frog (rana tigrina). | | 1978 | 152668 |
| histoenzymological mapping on the distribution of beta-galactosidase in the central nervous system of frog (rana tigrina). | | 1978 | 99238 |
| effect of the essential oil (e.o.) of psoralea corylifolia (linn) (p.c.) on isolated rectus abdominis of frog (rana tigrina). | | 2014 | 407154 |
| effect of progesterone administration on the distribution of oviductal carbohydrates in rana tigrina. | our aim has been to determine whether carbohydrate distribution in the oviducts of progesterone-treated animals is comparable with that of seasonal breeders in rana tigrina. like many other anurans, r. tigrina oviduct exhibits a short straight portion (pars recta, pr) at the beginning followed by a long, highly coiled portion (pars convoluta, pc). histologically, the oviduct of this species revealed some unique features, one of which was intense toluidine blue staining, specifically in the upper ... | 2009 | 19340461 |
| inherent rhythmicity and interstitial cells of cajal in a frog vein. | interstitial cells of cajal are responsible for rhythmic contractions of the musculature of the gastrointestinal tract and blood vessels.the existence of these cells and spontaneous rhythmicity were noticed in amphibian vein and the findings are reported in this paper.the postcaval vein was identified in the frog, rana tigrina and was perfused with amphibian ringer solution after isolation.contractile activity was recorded through a tension transducer connected to a polygraph.the isolated postca ... | 2008 | 19179763 |
| effect of acetylcholine on melanophores of rana tigrina. | acetylcholine produced melanin aggregation and blanching of skin colour in rana tigrina, the common indian frog. the effects were more prolonged in frogs pretreated with an anticholinesterase agent. acetylcholine effects were not antagonized by either m-cholinolytic (atropine) or n-cholinolytic (pentolinium) agents, but were markedly inhibited by procaine. the results have been discussed in the light of the well-known membrane-stabilizing effect of procaine. | 1976 | 955014 |
| effect of catecholamines on melanophores of rana tigrina. | | 1976 | 992813 |
| effect of beta-cyclodextrin compounds on the solubilization of three selected pesticides and their toxicity with methyl parathion to rana tigrina tadpoles. | | 2003 | 12719827 |
| pesticide impact on excretory physiology of the common frog, rana tigrina (daud) tadpoles. | | 2002 | 12068930 |
| effect of calcium and calmodulin antagonists on metamorphosis in the anuran tadpole, rana tigerina. | the fact that calcium ions regulate the secretion of thyroid hormones could be extended to explore how the mechanisms of anuran metamorphosis is controlled by thyroid hormones. in the present study, an attempt was made to investigate the effects of both calcium channel blocker, diltiazem (dt) and calmodulin inhibitor, trifluoperazine (tfp) on metamorphosis and various developmental stages of the anuran tadpole, rana tigerina. both dt (25 microm) and tfp (2 microm) treatments caused total inhibit ... | 1993 | 7949401 |
| histophysiology of the pancreatic islets of rana tigrina, treated with glucagon. | the effect of mammalian crystalline glucagon (0.5 mg and 2.0 mg/kg) on the blood glucose level and pancreatic islets of rana tigrina was studied at different stages after its treatment. this frog is moderately sensitive to glucagon and exhibits hyperglycemia and regressive changes, primarily in the beta- and secondarily in the alpha-cells of the islet tissue. the effectiveness of the hormone depends upon the dose employed. the restricted damage in only a fraction of the alpha-cells indicates tha ... | 1976 | 801307 |
| effect of glucose administration on the blood sugar and pancreatic islets of the frog, rana tigrina. | glucose evoked significant hyperglycemia in the frog, rana tigrina, 0.5 h after the injection and it took a longer time to regain normoglycemia than mammals, thus exhibiting a low glucose tolerance. the islet tissue of injected animals showed degranulation and atrophy of beta-cells only, the alpha-cells remained almost normal. this damage suggests that the beta-cells of this frog are functionally like those of mammals and other vertebrates, and secrete insulin. a single dose of glucose was found ... | 1976 | 785932 |
| some aspects of vascular pharmacology of frog (rana tigrina). | vascular autonomic receptors in amphibians exhibit difference from more evolved mammalian species. vascular perfusion studies in frog indicate constrictions by prominent muscarinic but rudimentary nicotinic constrictive regulation by cholinergic systems. difference from classical effect-patterns of pharmacological interventions, observed in the study, make room to visualise complexity of additional regulatory mechanisms. | 1992 | 1350773 |
| studies on the life-cycle of pleurogenoides ovatus rao, 1977 (trematoda: pleurogenetinae). | the life-cycle of pleurogenoides ovatus rao, 1977, infecting the frogs, rana tigrina and r. cyanophlyctis has been elucidated. all the life-cycle stages from egg to egg-producing adults were successfully established in the laboratory. the life-cycle took about 80 days for completion. cercariae were found in the freshwater snail. digoniostoma pulchella, collected from paddy fields at chelembra, malappuram district of kerala, during the monsoon months. cercariae are of the virgulate xiphidiocercou ... | 1991 | 2050984 |
| seasonal changes in the cytomorphology of hypophyseal acth cells in relation to the reproduction cycle of the female of the frog rana tigerina (daud.). | the hypophyseal acth (basophil type 3 or b3), cells of r. tigerina display seasonal changes in cytomorphology (nuclear, cytoplasm and cell area), staining intensity and cytoplasmic granulation. the cytoplasmic granules are fine and stain blackish purple with mcconaill's lead haematoxylin, with herlant's ab and the pas and og techniques they stain brownish red. the tinctorial response of their cytoplasm is pas- and og-positive and ab-negative. the b3 cells are low columnar or cuboidal in form and ... | 1991 | 1665370 |
| multiple electrophoretic bands of serum albumin in rana tigrina. | | 1974 | 4435151 |
| adrenoceptors in the heart of rana tigrina. | | 2013 | 4157019 |
| spontaneous regeneration of the gastrocnemius muscle of the frog. rana tigrina. | | 1974 | 4833678 |
| histochemical mapping of the distribution of adenosine triphosphatase, succinic dehydrogenase and non-specific esterase in the fore-brain of frog (rana tigrina). | | 1974 | 4280401 |
| proceedings: the use of rana tigrina for experiments on dorsal and ventral spinal nerve roots. | | 1973 | 4767056 |
| histamine librators and vasoconstriction in frog (rana tigrina). | | 1973 | 4128931 |
| lipid changes in the tadpoles of rana tigrina during growth and metamorphosis. | | 1973 | 4709978 |
| cellular composition of the pancreatic islets of the common indian frog, rana tigrina. | | 1973 | 4594553 |
| -glucuronidase in the excreta of tadpoles of rana tigrina during growth and metamorphosis. | | 1972 | 5032166 |
| dual cytologic localization of -glucuronidase in some organ-tissues of the frog (rana tigrina). | | 1972 | 5066106 |
| histoenzymology of -glucuronidase in the leydig cells of testes of the frog (rana tigrina) and its relation to their annual secretory cycle. | | 1972 | 5052934 |
| beta-glucuronidase in testes and ovaries of frogs (rana tigrina): a correlation of observations on histochemistry and biochemistry. | | 1972 | 4115324 |
| effects of some indole-3-alkylamines on the melanophores of rana tigrina. | | 1971 | 4111403 |
| beta-glucuronidase in alimentary canal of tadpoles of rana tigrina during growth and metamorphosis. | | 1971 | 5317794 |
| histoenzymorphology of -glucuronidase in the resorbing tails of tadpoles of rana tigrina at metamorphosis. | | 1971 | 5004765 |
| effect of varying environmental temperature on blood glucose level in indian frog, rana tigrina. | | 1970 | 5533835 |
| insulin, tolbutamide, phenformin and blood sugar of rana tigrina. | | 1970 | 5526140 |
| beta-glucuronidase in liver of tadpoles of rana tigrina during growth and metamorphosis. | | 1970 | 5440926 |
| cytochemical study of glycoproteins in summer cells of adrenal of frogs (rana tigrina). | | 1970 | 5423337 |
| hemoglobin polymorphism in indian frog (rana tigrina). | | 1969 | 5382967 |
| seasonal changes in the lipids of the liver of the frog. rana tigrina. | | 1968 | 5750468 |
| action of magnesium sulphate on melanophores of rana tigrina. | | 1968 | 5737359 |
| mechanism of insulin secretion in beta cells of pancreatic islets of the frog, rana tigrina. | | 1968 | 4883079 |
| nature of adrenergic receptors on the skin melanophores of rana tigrina. | | 1967 | 4383700 |
| histamine liberators and melanophores of rana tigrina. | | 1967 | 4382178 |
| studies on the carotid body in the frog rana tigrina daud. | | 1966 | 5990651 |
| component fatty acids of body, depot, liver & visceral fats of indian frog (rana tigrina). | | 1966 | 5977567 |
| a study on the cranio vertebral joint in the vertebrates. iv. in the amphibia as illustrated by its structure and development in rana tigrina. | | 1966 | 5987190 |
| haemoglobins of indian frog (rana tigrina). | | 1965 | 5860845 |
| chemical sterilization of male frogs (rana tigrina daud.). | | 1964 | 14202674 |
| induction of ovulation in frogs (rana tigrina daud) by copper sulphate. | | 1963 | 14154191 |
| a note on the suitability of the indian frog (rana tigrina) for the biological assay of tincture of digitalis. | | 1958 | 13514622 |
| the response of nucleus preopticus neurosecretory cells to ovarian pressure in the frog, rana tigrina. | intraovarian pressure (iop) of 5, 15, and 25 mm hg was administered in the frog, rana tigrina, and the response of the nucleus preopticus (npo) pars magnocellularis was investigated with aldehyde fuchsin (af) stain and immunocytochemical method using neurophysin (np) antisera. the 5 mm hg iop treatment resulted in cell and cell nuclear hypertrophy (p less than 0.001); discrete signs of de novo synthesis of af-positive and np-immunoreactive material in the perikarya and remarkable increases in th ... | 1990 | 2289685 |
| neurohypophysial hormones and cardiac activity in the frog, rana tigrina, and in the snake, ptyas mucosa. | the cardiac effects of neurohypophysial hormones (nh) in the frog, rana tigrina, and in the snake, ptyas mucosa, were studied in isolated atrial preparations. arginine vasopressin (avp), vasotocin (avt), isotocin (isn), mesotocin (msn), and oxytocin (oxy) produced dose-related positive chronotropic and inotropic responses in the frog atria. avt was the most potent. in the snake, avp, avt, msn, and oxy produced dose-related positive inotropic but not chronotropic changes. oxy was the most potent. ... | 1990 | 2332147 |
| inhibition of acetylcholinesterase in the central nervous system of rana tigrina by an organophosphate. | | 1990 | 2402003 |
| variation of ascorbic acid content in the different tissues of the frog rana tigrina as a function of season. | ascorbic acid concentrations of the liver, thigh, and cardiac muscles, ventral and dorsal skin, as well as muscles of the frog rana tigrina were higher during summer and lower in winter. ascorbate concentration also showed another high peak in february. the cardiac ascorbate showed minimal seasonal fluctuations. | 1990 | 2273642 |
| kinetics of acetyl coenzyme a:arylamine n-acetyltransferase from rapid and slow acetylator frog tissues. | n-acetyltransferase (nat) activity was determined in 100 frog (rana tigrina) livers using 2-aminofluorene and p-aminobenzoic acid as substrates. overall, the liver nat activity of the 50 females was higher than the liver nat activity of the 50 males. the activities (mean +/- sd) of nat from the bladder, blood, colon, and liver of males was 0.30 +/- 0.11, 0.05 +/- 0.03, 0.09 +/- 0.05, and 0.93 +/- 0.56 nmol/min/mg protein for the acetylation of aminofluorene and 0.29 +/- 0.06, 0.36 +/- 0.04, 0.26 ... | 1996 | 8742223 |
| phosalone poisoning on the cation-linked atpases of central nervous system of rana tigrina (daudin). | an acute dose of phosalone, an organophosphate pesticide, widely used in crop fields, injected to rana tigrina, intraperitoneally, inhibited the different inorganic ion linked atpase enzymes of the central nervous system (cns). six discrete cns compartments, namely telencephalon, mid-brain, rhombencephalon, cervical spinal cord, thoracic spinal cord and lumbar spinal cord showed markedly diminished atpase activity. atpases inhibition affected the neuronal activity and muscular coordination leadi ... | 1995 | 8564785 |
| distribution of corticotropin-releasing factor immunoreactive neurons in the brain of the tigerfrog, rana tigrina. | the distribution of immunoreactive (ir) neurons containing corticotropin-releasing factor (crf) is described in the brain of the tigerfrog, rana tigrina. the olfactory bulb, medial pallium, nucleus of the diagonal band of broca and medial area of the amygdala of the telencephalon showed ir-crf perikarya. the anterior and ventromedial thalamic nuclei, and the magnocellular nucleus preopticus (npo) revealed several ir cells; a few npo neurons were cerebrospinal fluid contacting in nature. the nucl ... | 1993 | 8361644 |
| tuberculosis in the frog rana tigerina (daud). | | 1983 | 6662562 |
| serum calcium and inorganic phosphorus level of rana tigrina in response to glucagon administration. | in rana tigrina, i.p. injection of glucagon (1 mg/kg/day) evokes a progressive hypocalcemia up to day 3 which declines after day 5. it also induces hypophosphatemia which continues throughout the experiment. | 1983 | 6825780 |
| effect of electrical stimulation of the testis on the nucleus praeopticus pars magnocellularis of the frog, rana tigrina. | the changes in the nucleus praeopticus (npo) pars magnocellularis of the frog rana tigrina were studied after electrical stimulation of the left testis. after a 3-min stimulation, the neurones of the nucleus showed a statistically significant increase in the nuclear and cellular diameters. the lateral neurones in particular showed a complete loss of nissl substance and other acute chromatolytic changes. in the aldehyde fuchsin stained preparations, however, the perikarya appeared filled with clu ... | 1982 | 7094013 |
| neuroglia in amphibian (rana tigrina) central nervous system. | neuroglia in the vertebrates are primarily classified as (i) ependymal and (2) non-ependymal gliocytes. in the present study neuroglia in the brain and spinal cord of frog (rana tigrina) has been studied under the light microscope using rapid golgi, holzer, and luxol fast blue-neutral red staining methods. ependymal glial cells with long processes having vascular and/or superficial terminal contacts, non-ependymal primitive glial cells (unipolar and bipolar) and phylogenetically more mature non- ... | 1981 | 7276540 |
| comparative studies of blood coagulation in hibernating and non-hibernating frogs (rana tigrina). | 1. during hibernation in frogs (rana tigrina) there occurs prolongation of several clotting tests, viz, whole blood clotting time, plasma recalcification time, cephalin time and prothrombin time. 2. the ambient body temperature of the frog during winter hibernation is low and the retarded blood clotting at lower temperature may play an important protective role against intravascular thrombosis. 3. shorter plasma recalcification time in low-spun plasma as compared to high-spun plasma indicated th ... | 1979 | 505409 |
| gel filtration behaviour of arginase in frog liver and kidney extracts. | the molecular weight of arginase, determined by gel filtration of frog (rana tigerina) liver and kidney extracts, varied with the protein concentration. it increased from about 25-27 kda in dilute solutions to about 92-96 kda in concentrated extracts. in addition, an arginase with a molecular weight of 45-49 kda appeared at intermediate concentrations. the results suggest the probable aggregation of arginase monomers to yield the dimeric and tetrameric forms of the enzyme at high protein concent ... | 2006 | 7689359 |
| seasonal variations in the drug-interactions on blood vessels of the frog (rana tigrina). | | 1979 | 40873 |
| reserpine-resistant adrenergic mechanisms in the cardiovascular system of the frog (rana tigrina). | | 2013 | 480982 |
| a note on the limb nerves of the frog (rana tigrina). | in the frog (rana tigrina) the mean length of the brain was 17.5 mm and that of the spinal cord 61 mm. the weight of the brain and spinal cord (together) was 389 mg. the fascicular number, fascicular area, total number of fibres and their density were studied in the left and right brachial nerves, left and right sciatic nerves and the sympathetic trunk (nerve). the largest number of nerve fascicles (12) was noticed in the sympathetic trunk while the right brachial nerve comprised of only one ner ... | 1978 | 646124 |
| hematology of the common indian frog rana tigrina. ii. leucocytes. | a study extending over a period of two years has been made on leucocytes differential count in common indian frog r. tigrina. as the values of differential count are almost similar in males and females, the data obtained for the two sexes have been pooled together. a table is given to compare the values of different leucocytes in r. tigrina with the values reported in other species of rana. the month to month variation has been recorded in various counts and an inverse relationship is observed i ... | 1977 | 907186 |
| haematology of the common indian frog rana tigrina i. erythrocytes. | a study of erythrocyte count and size in rana tigrina has been made over a period of two years. the erythrocyte count exhibits a wide range showing a month to month variation in both the sexes. an average count of 15,93,600 in females and 10,29,700 per mm3 in males is recorded. these values are appreciably high from march to july with a peak in may and june for males and females respectively. the starvation brings about a decrease in counts generally from 12th day onwards. the size of erythrocyt ... | 1977 | 883672 |
| effects of co60 gamma radiations on the conduction properties of frog sciatic nerves. | the effect of co60 gamma radiations on the amplitude, detection period and duration of the action potential of sciatic nerves of rana tigrina frogs have been studied. dose levels of up to 120 kr were employed. irradiation of the nerves with dose levels upto 30 kr does not seem to affect the action potential profiles. the amplitude falls rapidly therafter, registering less than 5% of the orginal value after irradiation by a dose of 120 kr. qualitatively similar behaviour is seen in the case of de ... | 2014 | 1222995 |
| seasonal variation in the structure & function of testis & thumb pad in the frog rana tigrina (daud.). | | 1975 | 1218897 |
| studies on sterol/steroid biosynthesis from 3:4 dihydroxy phenyl alanine. | homogenated tissue of gonads of rana tigrina were incubated in young's ringer solution containing 5 mg of 3:4 dihydroxy phenylalanine. an increase in the cholesterol and neutral-17-ketosteroids was found when compared with the control. perfusion of ovary with dopa gave similar results. however, there was a sharp drop (greater than 50%) in the cholesterol contents of the kidney and suprarenal under similar conditions. a postulated scheme of steroid biosynthesis from dopa is given. | 1975 | 814771 |
| a comparative study of histochemical mapping on the distribution of acid phosphatase and 5-nucleotidase in the forebrain of frog (rana tigrina). | the four well defined dorsal, lateral, medial and intermediate olfactory tracts of the frog have been studied. during their courses they become intermingled with fibers related to the primordial septum, the primordial hippocampus, the primordial dorsal pallium and the primordial piriform areas. in acid phosphatase preparations all these tracts are completely negative, and, therefore, are not identifiable. however, these tracts have intense staining reaction to 5-nucleotidase throughout their cou ... | 1976 | 1087927 |
| effect of cadmium on the testis of the indian bull-frog, rana tigrina daud. | | 1976 | 992158 |