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2000

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Articles 1741 - 1770 of 2418

Full-Text Articles in Life Sciences

Robinia Pseudo-Acacia L. As A Posssible Biomonitor Of Heavy Metal Pollution In Kayseri, Ahmet Aksoy, Uğur Şahi̇n, Fati̇h Duman Jan 2000

Robinia Pseudo-Acacia L. As A Posssible Biomonitor Of Heavy Metal Pollution In Kayseri, Ahmet Aksoy, Uğur Şahi̇n, Fati̇h Duman

Turkish Journal of Botany

The leaves of Robinia pseudo-acacia L. (Fabaceae) were tested as a possible biomonitor of heavy metal pollution in Kayseri. Concentrations of Pb, Cd, Cu and Zn were determined in unwashed and washed leaves and soils collected from a wide range of sites with different degrees of metal pollution. Differences between the unwashed and washed samples varied according to the metal pollutant levels. Significant correlations were obtained between the heavy metal concentrations in surface soil and washed leaf samples. R. pseudo-acacia was found to be a useful biomonitor of the heavy metals investigated.

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A New Myxomycetes Record For The Turkish Mycoflora, C. Cem Ergül, Başaran Dülger Jan 2000

A New Myxomycetes Record For The Turkish Mycoflora, C. Cem Ergül, Başaran Dülger

Turkish Journal of Botany

The myxomycetes taxon Arcyria minuta Buchet is a new record for the Turkish Mycoflora.

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A New Record For The Flora Of Turkey Physalis Angulatal. (Solanaceae), Mehmet Kaya, Ayşegül Yildirim, F. Nezi̇hi̇ Uygur Jan 2000

A New Record For The Flora Of Turkey Physalis Angulatal. (Solanaceae), Mehmet Kaya, Ayşegül Yildirim, F. Nezi̇hi̇ Uygur

Turkish Journal of Botany

A new species, Physalis angulata L. (Solanaceae) is reported for the first time for the flora of Turkey. The specimens were collected from cotton, corn and soybean fields in the Ceyhan, Karataß, Kozan, Yumurtalık (C5) and Osmaniye (C6) districts of Adana, and the Tarsus district of İçel (C5).

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New Floristic Records For The Grid Square A3 (Kocaeli/Turkey), Şener Akinci, Engi̇n Özhatay Jan 2000

New Floristic Records For The Grid Square A3 (Kocaeli/Turkey), Şener Akinci, Engi̇n Özhatay

Turkish Journal of Botany

No abstract provided.

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New Floristic Records From Square B6 (Sivas/Kayseri), Erol Dönmez Jan 2000

New Floristic Records From Square B6 (Sivas/Kayseri), Erol Dönmez

Turkish Journal of Botany

No abstract provided.

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A Study Of Selected Isozymes In Capsicum Baccatum, Capsicum Eximium, Capsicum Cardenasii And Two Interspecific F_1 Hybrids In Capsicum Species, A. Naci̇ Onuş, Barbara Pickersgill Jan 2000

A Study Of Selected Isozymes In Capsicum Baccatum, Capsicum Eximium, Capsicum Cardenasii And Two Interspecific F_1 Hybrids In Capsicum Species, A. Naci̇ Onuş, Barbara Pickersgill

Turkish Journal of Botany

Selected isozymes were investigated in plants of Capsicum baccatum L. ( Solanaceae) accessions SA219 (P.G.Smith), Hawkes 6489 (P.G.Smith), Capsicum cardenasii Heiser and Smith accession SA268 (P.G.Smith), Capsicum eximium A.T.Hunz accession Hawkes 3860 (J.G.Hawkes) and two interspecific F1 hybrids, C. baccatum SA219 x C. eximium Hawkes 3860 and C. baccatum Hawkes 6489 x C. cardenasii SA 268. The standard technique of horizontal gel electrophoresis was employed. The gel was cut into several slices and stained for different enzyme systems (aconitase, alanin aminopeptidase, esterase, glutamic oxaloacetic transaminase, glycerate-2-dehydrogenases, isocitrate dehydrogenase, malate dehydrogenase, peroxidase, phosphoglucomutase, phosphoglucose isomerases and shikimate dehydrogenases). After fixing the …

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Monogenic Segregations In Backcross Progenies Of Capsicum Baccatumx Two Interspecific F_1 Hybrids And Some Possible Explanations For Distorted Segregation Ratios In Capsicum, A. Naci̇ Onuş, Barbara Pickersgill Jan 2000

Monogenic Segregations In Backcross Progenies Of Capsicum Baccatumx Two Interspecific F_1 Hybrids And Some Possible Explanations For Distorted Segregation Ratios In Capsicum, A. Naci̇ Onuş, Barbara Pickersgill

Turkish Journal of Botany

Monogenic segregations of certain morphological and isozymic characters were studied in backcross progenies of Capsicum baccatumL. ( Solanaceae) x two interspecific F_1 hybrids and distorted segregation ratios were noted. It was observed that isozyme markers Est-5, Idh-1, Pgm-2, and Pgi-2, and morphological marker gene P for fruit persistence showed distorted segregation ratios in the first backcross generation of both C. baccatumHawkes 6489 (P.G.Smith) x F_1 ( C. baccatum Hawkes 6489 x Capsicum cardenasii Heiser Smith) and C. baccatum SA219 (P.G.Smith) x F_1 ( C. baccatum SA219 x Capsicum eximiumA.T.Hunz). Both progenies and an excess of individuals carrying alleles inherited from …

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Germin-Like Oxalate Oxidase Activity Increase In Auxin-Treated Wheat Coleoptiles, Mahmut Çalişkan, Andrew C. Cuming Jan 2000

Germin-Like Oxalate Oxidase Activity Increase In Auxin-Treated Wheat Coleoptiles, Mahmut Çalişkan, Andrew C. Cuming

Turkish Journal of Botany

Oxalic acid or more commonly its salts, oxalates, are widely distributed throughout the plant kingdom. Oxalic acid is generally considered an inert product of metabolism and its accumulation is toxic to tissues. Therefore, the enzymes degrading oxalic acid have received considerable attention. Oxalate oxidase is an oxidoreductase which degrades oxalate into CO_2 and H_2O_2 . Recently, oxalate oxidase was shown to have high amino acid homology with germin proteins and at the same time cereal germin proteins were shown to have oxalate oxidase activity. Germin gene expression was shown to be auxin responsive. It was well demonstrated that coleoptile cells …

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Structure Of The Stigma And Style In Capsicum Eximiumand The Effects Of Pollination, A. Naci̇ Onuş Jan 2000

Structure Of The Stigma And Style In Capsicum Eximiumand The Effects Of Pollination, A. Naci̇ Onuş

Turkish Journal of Botany

Since the stigma surface provides the first point of contact for pollen grains, the initial pollen-pistil interaction takes place between these two structures. It is, therefore, important to understand the stucture of the stigma, as well as the style, in order to reveal the nature of pollen-pistil interaction. The aim of this study was to gather more information about interactions between pollen and pistil in Capsicum eximium A.T.Hunz Solanaceae by studying immature, mature unpollinated and mature pollinated styles. It was found that most features of the stigma and style of C. eximiumresembled those of other genera in the Solanaceae.

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An Autecological Study On Iris Histrioides Foster (Iridaceae) Distributed In The Central Black Sea Region, Nezahat Kandemi̇r, Ali̇ Engi̇n Jan 2000

An Autecological Study On Iris Histrioides Foster (Iridaceae) Distributed In The Central Black Sea Region, Nezahat Kandemi̇r, Ali̇ Engi̇n

Turkish Journal of Botany

Iris histrioides Foster, a Euxinian and endemic element, was investigated in terms of its phenological and ecological properties. Some elements taken from the above-and below-ground parts of the plant in the vegetative and generative growth periods have been analyzed. According to the results of the analysis, N%,P% and K% contets are high in above-ground parts during the vegetative growth phase. In addition, soil samples were collected from 0-20 cm depth and analyzed physically and chemically.

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Evidence That The Neurokinin 1 Receptor Is Expressed In Spinal Neurones Which Do Not Synthesize Nitric Oxide In The Rat, Mümtaz Nazli, Richard Morris Jan 2000

Evidence That The Neurokinin 1 Receptor Is Expressed In Spinal Neurones Which Do Not Synthesize Nitric Oxide In The Rat, Mümtaz Nazli, Richard Morris

Turkish Journal of Veterinary & Animal Sciences

The co-localization of the distribution of the neurokinin 1 receptor with nitric oxide was investigated in laminae I-II, III- IV, X and in the intermediolateral horn of the spinal cord in thirteen adult rats. Silver-intensified gold and standard immunocytochemical labelling or standard double immunocytochemical labelling were employed in 40µm-thick sections of the spinal cord. There were many NK1 receptor-expressing neurones in the dorsal horn of the spinal cord, but none of these expressed NOS. Although neurones expressing the NK1 receptor and NOS were in close proximity in LX and IML, co-localization of the NK1 receptor and NOS in single neurones …

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Epidermal Growth Factor Receptor (Egfr) Immunolocalization In The Male Rat Reproductive Tract During Pre-And Postnatal Periods, Celal Kaloğlu, Hüseyi̇n Eray Bulut, Bi̇lge Onarlioğlu Jan 2000

Epidermal Growth Factor Receptor (Egfr) Immunolocalization In The Male Rat Reproductive Tract During Pre-And Postnatal Periods, Celal Kaloğlu, Hüseyi̇n Eray Bulut, Bi̇lge Onarlioğlu

Turkish Journal of Veterinary & Animal Sciences

A number of recent studies suggest the effects of several growth factors as well as genetic factors on the development and differentiation of the testes and excretory ducts. One of the most important growth factors affecting the development and differentiation of the above-mentioned organs may be epidermal growth factor (EGF). Therefore, the aim of the present study was to investigate the effects of EGF on the development of the testes and excretory ducts of male rats by determining the immunolocalization of EGF receptors in these organs during foetal and postnatal periods. To do this, testicular and excretory duct tissue samples …

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A Study On The Effects Of Chilling On The Microbiological Quality Of Poultry Carcasses And Surface Decontamination With Lactic Acid, Hali̇l Tosun, Abdurrahman Üsame Tamer Jan 2000

A Study On The Effects Of Chilling On The Microbiological Quality Of Poultry Carcasses And Surface Decontamination With Lactic Acid, Hali̇l Tosun, Abdurrahman Üsame Tamer

Turkish Journal of Veterinary & Animal Sciences

Effects of immersion chilling on the microbiological quality of poultry carcasses and cross contamination of Salmonella were studied. Levels of aerobic mezophilic bacteria, coliform, Escherichia coli and the incidence of Salmonella were determined prechill and postchill. The level of coliform and E. coli were reduced by immersion chilling (P0.05) but there was an increase in Salmonella incidence in carcasses exiting the immersion chiller indicating that this may be the point of most significant cross contamination in broiler processing plants. Experiments on microbial decontamination of poultry carcasses with lactic acid were performed. The microbial levels of poultry carcasses were reduced significantly …

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Investigations On The Spermatological Characteristics Of Ram Semen Frozen In Liquid Nitrogen Vapour And Used For Insemination With Different Methods, Hazim Gökçen, M. Kemal Soylu, İbrahi̇m Doğan Jan 2000

Investigations On The Spermatological Characteristics Of Ram Semen Frozen In Liquid Nitrogen Vapour And Used For Insemination With Different Methods, Hazim Gökçen, M. Kemal Soylu, İbrahi̇m Doğan

Turkish Journal of Veterinary & Animal Sciences

In the first step, semen samples were diluted with Tris+Citric acid+Fructose+Egg yolk and Sadium citrate+Egg yolk diluents and were frozen in liquid nitrogen vapour. In the second step, 120 Merino ewes were synchronised with sponges, which contained flourogestone acetate, for 14 days. PMSG was injected into the ewes on the withdrawal day. Ewes were divided into groups and subgroups. Gn-RH was injected into half of the subgroup ewes at the beginning of their oestrus. Ewes were inseminated with fresh and frozen semen. Conception rates of ewes inseminated with fresh semen both at the beginning and at the end of the …

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Effects Of The Levels Of Astaxanthin In The Diet On The Flesh Pigmentation Of Rainbow Trout, Muammer Erdem, Sebahatti̇n Ergün Jan 2000

Effects Of The Levels Of Astaxanthin In The Diet On The Flesh Pigmentation Of Rainbow Trout, Muammer Erdem, Sebahatti̇n Ergün

Turkish Journal of Veterinary & Animal Sciences

A feeding trial was conducted to study the effects of dietary astaxanthin concentration on muscle pigmentation of rainbow trout ( Oncorhynchus mykiss) with a mean initial weight of 270 g fed diets supplemented with astaxanthin in diet concentrations of 60 (group II) and 90 mg/kg (group III) for 35 days. A control (I) group received a diet without astaxanthin. At the end of the experiment, the trout showed average body weight increases of 250.660g, 261.675 g and 234.410 g, and the flesh reached a level of 0.695 mg/kg, 10.539 mg/kg and 11.954 mg carotenoid/kg in groups I, II and III, …

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The Effect Of Modified Atmosphere Packaging (Map) On The Shelf? Life Of Marinated And Breaded Rainbow Trout, Nuray Erkan, Sühendan Mol, Candan Varlik, Taçnur Baygar, Özkan Özden, Hüseyi̇n Gün, Hani̇fe Kalafatoğlu Jan 2000

The Effect Of Modified Atmosphere Packaging (Map) On The Shelf? Life Of Marinated And Breaded Rainbow Trout, Nuray Erkan, Sühendan Mol, Candan Varlik, Taçnur Baygar, Özkan Özden, Hüseyi̇n Gün, Hani̇fe Kalafatoğlu

Turkish Journal of Veterinary & Animal Sciences

The rainbow trout has a great production capacity in Turkey. Marinated and breaded rainbow trout was prepared and the effect of the MAP technology on the shelf-life was studied. The samples were packaged and stored in 3 groups. These were the control (air), group A (5% O_2 + 35% CO_2 + 60% N_2 ), and group B (30% CO_2 + 70% N_2 ). According to the results of the sensory, physical, chemical and the microbiological analyses, the control group samples spoiled after the 90^{th} day and the A and B groups spoiled after the 120^{th} day of storage. The results …

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Estimation Of Milk Yield Losses From Subclinical Mastitis In Dairy Cows, Cengi̇z Yalçin, Yavuz Cevger, Kenan Türkyilmaz, Gül Uysal Jan 2000

Estimation Of Milk Yield Losses From Subclinical Mastitis In Dairy Cows, Cengi̇z Yalçin, Yavuz Cevger, Kenan Türkyilmaz, Gül Uysal

Turkish Journal of Veterinary & Animal Sciences

Multiple regression analysis was utililised to estimate the relationship between somatic cell counts (SCC) and milk yield using the data of 1687 quarter milk samples collected weekly from 20 cows at the Dairy Unit of A.U. Veterinary Faculty's Research Farm between May and October 1998. The findings of this study supported the results of similar previous studies on that there is a negative relationship between SCC and milk yield, the relationship between milk yield and lnSCC (natural logarithmic form) is not linear. It was found that milk yield loss from SCC vary considerably according to the level of SCC. The …

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New Rumen Ciliates From Turkish Domestic Cattle ( Bos Taurus L.): 2. Epidinium Graini N. Sp. (Ophryoscolecidae, Entodiniomorphida), Bayram Göçmen Jan 2000

New Rumen Ciliates From Turkish Domestic Cattle ( Bos Taurus L.): 2. Epidinium Graini N. Sp. (Ophryoscolecidae, Entodiniomorphida), Bayram Göçmen

Turkish Journal of Zoology

In the course of examining rumen contents obtained from 30 domestic cattle ( Bos taurus L.) in the vicinity of İzmir, Turkey, somewhat similar but unusual forms of epidinia were observed. These ciliated protozoa were observed in six of the animals with a frequency of 20.00%, and this study is concerned with their classification into a species, Epidinium graini n. sp. All the protozoa identified as belonging to this species were divided into three formae, E. graini f. graini n. f., E. graini f. caudatricoronatum n. f. and E. graini f. caudaquadricoronatum n. f.. These species have 2-4 transversally periplasmic …

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The Ciliate Fauna In The Digestive System Of Rana Ridibunda(Amphibia: Anura) I: Balantidium (Balantidiidae, Trichostomatida), Naci̇ye Gülkiz Şenler, İsmai̇l Yildiz Jan 2000

The Ciliate Fauna In The Digestive System Of Rana Ridibunda(Amphibia: Anura) I: Balantidium (Balantidiidae, Trichostomatida), Naci̇ye Gülkiz Şenler, İsmai̇l Yildiz

Turkish Journal of Zoology

Balantidium spp. living in the digestive system of Rana ridibunda in Van were determined. Five species belonging to the genus Balantidiumwere distinguished. Of these, one new species was recognized, described as Balantidium vanensisn. sp. This study reports for the first time the presence of B. helenae, B. claperedei and B. giganteumin the digestive system of R. ridibunda. These species are also new records for the protozoan fauna of Turkey. There was only B. duodeni in the duodenum and B. elongatum in the intestinal part next to the duodenum. The species of the genus Balantidium in the rectum constituted 50.21% of …

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A Study On The Fishes Of Edremit Bay (Aegean Sea)Hatice Torcu, Zeliha Aka, Hati̇ce Torcu, Zeli̇ha Aka Jan 2000

A Study On The Fishes Of Edremit Bay (Aegean Sea)Hatice Torcu, Zeliha Aka, Hati̇ce Torcu, Zeli̇ha Aka

Turkish Journal of Zoology

This investigation was carried out for the determination of fish species living in Edremit Bay (Aegean Sea). Morphometric and meristic characters of fishes caught by trawl and various nets from five stations determined in Edremit Bay in the years 1996- 1997 were examined. Some morphological and ecological properties, local names and distributions to stations of 68 determined species are given. These species are new records for Edremit Bay of Aegean Sea.

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A Taxonomical Study On The Rotifer Fauna Of Yedigöller (Bolu-Turkey), Ahmet Altindağ Jan 2000

A Taxonomical Study On The Rotifer Fauna Of Yedigöller (Bolu-Turkey), Ahmet Altindağ

Turkish Journal of Zoology

The study was carried out at Yedigöller (Turkey) between January and November, 1997. Thirty-one species of rotifers were identified, all of which were new for Yedigöller. Three species ( Dicronophorus caudatus, Synchaeta lokowitziana, Trichocerca bidens ) were new records for the Turkish fauna.

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A Preliminary Study On The Ostracoda (Crustacea) Fauna Of Lake Aksehir, Selçuk Altinsaçli, Mustafa Kiliç, Songül Altinsaçli Jan 2000

A Preliminary Study On The Ostracoda (Crustacea) Fauna Of Lake Aksehir, Selçuk Altinsaçli, Mustafa Kiliç, Songül Altinsaçli

Turkish Journal of Zoology

In this study, material was collected from Lake Aksehir in the years 1997 to 1999. The materials, collected from six localities, were evaluated and eleven speceis (Ilyocypris biplicata, Ilyocypris gibba, Candona angulata, Candona compressa, Candona neglecta, Eucypris zenkeri, Cyprinotus salinus, Heterocypris incongruens, Ilyodromus olivaceus, Cypridopsis vidua, Limnocythere inopinata) belonging to eight genera were determined.

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Freshwater Isopod Species (Crustacea) Of Turkish Thrace And Their Distribution, Belgi̇n Çamur Eli̇pek, Ti̇mur Kirgiz Jan 2000

Freshwater Isopod Species (Crustacea) Of Turkish Thrace And Their Distribution, Belgi̇n Çamur Eli̇pek, Ti̇mur Kirgiz

Turkish Journal of Zoology

This study was undertaken to determine the freshwater Isopod fauna of Turkish Thrace. Samples were collected during the years 1985-1987, 1989-1992 and 1994-1997. According to the results, Asellus (Asellus) aquaticus(L.) Racovitza, Asellus (Asellus) hilgendorfiBovallius, Asellus (Proasellus) infirmus Birstein belonging to the genus Asellus of the Asellidae family and Jaera (Jaera) sarsi Valkanov belonging to the genus Jaeraof the Janiridae family were determined. Of the species, Asellus (Asellus) hilgendorfi Bovallius, Asellus (Proasellus) infirmus Birstein and Jaera (Jaera) sarsi Valkanov are new records for Turkey. The worldwide distributions of these species are included.

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Compensatory Growth In Sea Bass ( Dicentrarchus Labrax), Sea Bream ( Sparus Aurata) And Rainbow Trout ( Oncorhynchus Mykiss), Temel Şahi̇n, Bi̇lal Akbulut, Muharrem Aksungur Jan 2000

Compensatory Growth In Sea Bass ( Dicentrarchus Labrax), Sea Bream ( Sparus Aurata) And Rainbow Trout ( Oncorhynchus Mykiss), Temel Şahi̇n, Bi̇lal Akbulut, Muharrem Aksungur

Turkish Journal of Zoology

The effects of a period of starvation and subsequent refeeding on the weight and length of sea bass, sea bream and rainbow trout reared at 17%o salinity and at different temperatures were investigated. The fish were starved for 3 weeks and then fed ad libitum by hand for 3 weeks in the 3 periods studied. The study provided evidence of the adaptation of the fish to starvation followed by what may be termed compensatory growth once feeding was resumed. The length changes of the fish indicate that the weight gains were due to grojth rather than increases in gut fat …

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The Role Of Phenotypic Plasticity In Host Race Formation And Sympatric Speciation In Phytophagous Insects, Particularly In Aphids, Gazi̇ Görür Jan 2000

The Role Of Phenotypic Plasticity In Host Race Formation And Sympatric Speciation In Phytophagous Insects, Particularly In Aphids, Gazi̇ Görür

Turkish Journal of Zoology

The genetic structure of aphid populations has received increasing attention as a result of the evolution of insecticide resistance, the appearance of biotypes overcoming plant resistance and the increasing spread of aphid-born viruses. How can they manage to use different hosts and overcome insecticide and plants' morphological barriers? Recently, plasticity has been given more attention in ecological and evolutionary contexts as a specific adaptation to environmental variability. Phenotypic variation is crucial to a comprehension of evolutionary mechanisms, especially phenotypic host race formation and sympatric speciation in aphids. It is becoming clear that phenotypic plasticity is a fundamental component of evolutionary …

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An Evaluation Of The Water Quality Of Yuvarlakçay Stream,In The Köycegiz-Dalyan Protected Area, Sw Turkey, Ni̇lgün Kazanci, Muzaffer Dügel Jan 2000

An Evaluation Of The Water Quality Of Yuvarlakçay Stream,In The Köycegiz-Dalyan Protected Area, Sw Turkey, Ni̇lgün Kazanci, Muzaffer Dügel

Turkish Journal of Zoology

The longitudinal and seasonal distribution of macroinvertebrates and the physical and chemical variables of Yuvarlak Stream in the Köycegiz-Dalyan Protected Area in South-Western Turkey were studied between April 1992 and April 1993. The diversity, frequency, dominance, abundance and similarity of macroinvertebrates through the year were recorded. In addition, the Belgian Biotic Index was used as a biological criterion for the assessment of water quality for the first time in Turkey. According to the physico-chemical variables and the distribution of benthic macroinvertebrates, continuous slight and moderate organic pollution exists in the stream. The monitoring of the water quality of Yuvarlakçay Stream …

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A Histochemical Study Of The Origin Regions Of The Triceps Muscle Of The Sparrow (Passer Domesticus), Fati̇me Geyi̇koğlu, Abdullah Özkaral Jan 2000

A Histochemical Study Of The Origin Regions Of The Triceps Muscle Of The Sparrow (Passer Domesticus), Fati̇me Geyi̇koğlu, Abdullah Özkaral

Turkish Journal of Zoology

The muscle fibers in the origin regions of the triceps muscle of Passer domesticuswere characterized histochemically on the basis of their myofibrillar adenosine triphosphatase (mATPase) activity after acidic and alkaline preincubations. Muscle fibers were identified as type II (alkaline-stable/acid-labile mATPase activity) and type III (alkaline-stable/acid-stable mATPase activity). The number of type II fibers was higher in the muscle studied (83%) and this was found to be significant.

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Some Reproduction Characteristics Of Capoeta Tinca (Heckel, 1843) Living In The Oltu Stream Of Çoruh Basin, Ayhan Yildirim, M. Sitki Aras Jan 2000

Some Reproduction Characteristics Of Capoeta Tinca (Heckel, 1843) Living In The Oltu Stream Of Çoruh Basin, Ayhan Yildirim, M. Sitki Aras

Turkish Journal of Zoology

913 specimens of Capoeta tinca (Heckel, 1843) were analysed in Oltu Stream-Çoruh Basin from August, 1994 to July, 1996. It was determined that the age distribution in the population varied between I and XII, but age group III was dominant in number. The sexual maturity of specimens in the population were complete at the age of II in males and III in females, and they spawned between May and July when water temperature was 16°C. Fecundity was on average 5561±833 eggs/female and was related to fork length, total weight, age and gonad weight.

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The Metabolism Of Oxalic Acid, Mahmut Çalişkan Jan 2000

The Metabolism Of Oxalic Acid, Mahmut Çalişkan

Turkish Journal of Zoology

Oxalic acid is a widely occurring natural product of animals, plants and other organisms. It sometimes occurs as a free acid, but more commonly as a calcium salt. Organisms exhibit various levels of oxalate content which even show fluctuations among the organs of the same individual. Although oxalate seems to engage in the metabolism and adaptation of animals, plants and fungi, its mechanism is far from being completely understood. There is now an appreciable body of information regarding the occurrence and significance of oxalic acid in living tissues but the data are widely scattered in various scientific areas due to …

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A Study On The Hibernation Of Spermophilus Xanthoprymnus (Bennet, 1835) (Mammalia: Rodentia) In Turkey, Nuri̇ Yi̇ği̇t, Ercüment Çolak, Mustafa Sözen, Şaki̇r Özkurt Jan 2000

A Study On The Hibernation Of Spermophilus Xanthoprymnus (Bennet, 1835) (Mammalia: Rodentia) In Turkey, Nuri̇ Yi̇ği̇t, Ercüment Çolak, Mustafa Sözen, Şaki̇r Özkurt

Turkish Journal of Zoology

In this study, the hibernation of ground squirrels ( Spermophilus xanthoprymnus) distributed in Central Anatolia were studied in laboratory and field conditions. According to our findings, the hibernation period of ground squirrels began at the end of August and terminated in mid February. The longest and shortest hibernation bouts of ground squirrels were found to be 100 and 21 days, respectively. In this period, the longest ununterrupted hibernation was 13 days. Ground squirrels gained weight during the early months of summer and then lost weight constantly throughout hibernation period. No marked periodic cycles were observed in the periods of weight …

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