INTERSECTIONS OF SURFACES OF REVOLUTION

In this paper, we deal with surfaces of revolution and their intersections. We start with the surfaces of revolution RS that have their axis along the x3–axis and find intersections with a line, a plane, and then intersection of two such RS. Furthermore, we apply formulas for the intersection with a line to determine the visibility of RS. Later we develop formulas for the intersection of two surfaces of revolution that have their axis along different arbitrary straight lines, and, as a special case, the intersections of two spheres and intersections of general surface of revolution with a sphere and a surface given by an equation. We apply our own software to the graphical representation of all the results we present

Polyphenolic profile and biochemical activity of extracts of selected plant species as a source of potential natural nutraceuticals

Ova doktorska disertacija je koncipirana sa ciljem da ispita polifenolni profil kao i potencijalna biohemijska dejstva ekstakata dobijenih različitim tehnikama ekstrakcije (konvencionalnim i nekonvencionalnim) odabranih biljnih vrsta Lavatera thuringiaca L., Erica carnea L. i Satureja hortensis L. Od konvencionalnih ekstrakcija su primenjene Soksletova (Soxlet) ekstrakcija i maceracija, a od savremenih ultrazvučna ekstrakcija, mikrotalasna ekstrakcija i subkritična ekstrakcija vodom. Takođe, ova istraživanja su usmerena u pravcu pružanja mogućnosti navedenih biljnih ekstrakata kao izvora potencijalnih prirodnih nutraceutika. U tom smislu, u ovoj doktorskoj disertaciji su prezentirani rezultati sledećih ispitivanja: • kvalitativna identifikacija komponenata ekstrakata biljnih vrsti L. thuringiaca L., E. carnea L. i S. hortensis L • kvantitativna analiza komponenata ekstrakata biljnih vrsti L. thuringiaca L., E. carnea L. i S.hortensis L • biohemijska aktivnost ekstrakata biljnih vrsta L. thuringiaca L., E. carnea L. i S. hortensis L • određivanje opšte toksičnosti i genotoksičnosti ispitivanih ekstrakata biljnih vrsta L. thuringiaca L., E. carnea L. i S. hortensis L., kako bi utvrdili mogućnost primene istih kao potencijalnih prirodnih nutraceutika. Na osnovu svih sprovedenih istraživanja,ekstrakti dobijeni iz biljnih vrsta L. thuringiaca L., E.carnea L. i S.hortensis L. su od neprocenjivog naučnog značaja. Oni predstavljaju smernice za dalje proučavanje i primenu ovih biljnih vrsta kao izvora prirodnih nutraceutika u preventivne i terapijske svrhe. Ujedno doprinos naučnom napretku na polju biohemije, medicine, farmacije, farmakoterapije u vidu proširenja saznanja o aktivnim sastojcima biljaka i njihovog pozitivnog delovanja u tretmanu različitih bolesti, ali i u profilaksi radi očuvanja zdravlja kao najvažnijeg resursa sa kojim čovek raspolaže.This doctoral dissertation is designed to examine the polyphenolic profile as well as the potential biochemical effects of extracts obtained by different extraction techniques (conventional and unconventional) of protected plants of the species Lavatera thuringiaca L. Erica carnea L. and Satureja hortensis L. Also, this research is aimed at providing the possibility of these plant extracts as a source of potential natural nutraceuticals. In that sense, in this doctoral dissertation the results of the following examinations are presented:In this sense, the paper presents the results of the following tests: • qualitative identification of components of extracts of plant species L. thuringiaca L., E. carnea L. and S. hortensis L, • • quantitative analysis of components of extracts of plant species L. thuringiaca L., E. carnea L. and S. hortensis L, • • biochemical activity of extracts of plant species L. thuringiaca L., E. carnea L. and S. hortensis L, • • determination of general toxicity and genotoxicity of tested extracts of plant species L. thuringiaca L., E. carnea L. and S. hortensis L., in order to determine the possibility of using them as potential natural nutraceuticals. • Based on all conducted research, extracts were obtained from plant species L. thuringiaca L., E. carnea L. and S. hortensis L. are of inestimable scientific importance. They represent guidelines for further study and application of these plant species as sources of natural nutraceuticals in preventive and therapeutic species. One contribution to scientific progress in biochemistry, medicine, pharmacy, pharmacotherapy in the form of expanding knowledge about the active ingredients of bioca and their positive effects is the beginning of the treatment of a large number of diagnostic tests

Samoprijavljene alergije na lijekove kod kirurških bolesnika u Srbiji

History of drug allergy is of major concern during perioperative period. Medical records usually lack documents confirming the stated allergy. This study aimed to investigate the prevalence of self-reported drug allergies and their characteristics in adult Serbian surgical population, and to analyze their influence on drug prescription during perioperative period. The study enrolled patients scheduled for general surgery during a one-year period at a tertiary care hospital. They were questioned using a structured questionnaire about the existence of drug allergy and its nature. Medical records were examined after discharge to assess medical prescription during hospitalization. Of 1126 patients evaluated during the study period, 434 (38.5%) reported a total of 635 drug reactions. The most common allergy claim was to antibiotics (68%), nonsteroidal antiinflammatory drugs (16.4%) and iodine (3.9%). Women, urban residents and herbal drug consumers were more likely to state an allergy. The majority of reported reactions were cutaneous (72%) and respiratory (34%), while anaphylaxis was reported by 3.2% of patients. Only 38 (8.7%) patients had previously undergone any allergology testing. Retrospective chart review revealed that 26 (6%) patients were administered the drug to which they had reported allergic reaction in the past, with no adverse effects. Drug allergies are frequently self-reported in surgical population in Serbia, which is in contrast to a very low rate of explored and documented allergies. In order not to deny an effective treatment or postpone a surgery, health care practitioners should pay more attention to an accurate classification of adverse drug reactions.Podatak o alergiji na lijekove je od velikog značenja u perioperacijskom razdoblju, a medicinska dokumentacija obično ne sadrži dokumente koji potvrđuju prijavljenu alergiju. Cilj ovoga istraživanja bio je ispitati učestalost i značajke samoprijavljenih alergija na lijekove od strane odraslih kirurških bolesnika u Srbiji i analizirati utjecaj takvog anamnestičkog podatka na propisivanje lijekova u perioperacijskom razdoblju. Studija je obuhvatila bolesnike podvrgnute elektivnim kirurškim intervencijama iz područja opće kirurgije tijekom jednogodišnjeg razdoblja u tercijarnoj zdravstvenoj ustanovi. Oni su ispitivani primjenom strukturiranog upitnika o postojanju alergija i njihovoj naravi. Medicinska dokumentacija je pregledana nakon otpusta iz bolnice kako bi se ispitalo propisivanje lijekova tijekom hospitalizacije. Od 1126 bolesnika evaluiranih tijekom studije, 434 (38,5%) ih je prijavilo ukupno 635 reakcija na lijekove. Najčešće samoprijavljene alergijske reakcije su bile na antibiotike (68%), nesteroidne protuupalne lijekove (16,4%) i jodni kontrast (3,9%). Samoprijavljivanje alergija je bilo češće kod žena, stanovnika urbanih područja i korisnika biljnih lijekova. Većinu prijavljenih reakcija su činile kožne (72%) i respiracijske (34%), dok je anafilaksu prijavilo 3,2% bolesnika. Samo 38 (8,7%) bolesnika je nakon reakcije podvrgnuto nekom alergološkom testiranju. Pregled povijesti bolesti je pokazao da je 26 (6%) bolesnika tijekom hospitalizacije primilo lijek na koji su prijavili alergijsku reakciju u prošlosti, što nije bilo praćeno neželjenim učincima. Samoprijavljivanje alergija na lijekove je veoma često kod kirurških bolesnika u Srbiji, što je u suprotnosti s niskom stopom ispitanih i dokumentiranih alergija. Kako se bolesnicima ne bi uskratila učinkovita terapija ili odlagala operacija, zdravstveni radnici bi trebali više pozornosti posvetiti preciznoj klasifikaciji neželjenih reakcija na lijekove

Comparative digestomics of Tropomyosin of vertebrates and invertebrates in real food matrix

Shellfish, is a highly nutritive food resource in the world, but also among the eight allergic food groups accounting for approximately 90% of all immunoglobulin E food allergies worldwide [1]. This work focuses on the only well-recognized major allergen muscle protein tropomyosin(TM) that is responsible for cross reactivity between shellfish and other invertebrates [2]. By contrary, TM of vertebrates (chicken, pig, cow) is not a prominent allergen. The stability of food allergens to digestion is an important factor contributing to their allergenicity. Most in vitro digestibility studies are based on the protein extract rather than whole food matrix thus overlooking its effect on TM stability [3]. Our objective was to primarily test the pepsin digestibility of invertebrates and vertebrates (raw and thermally treated based on their real life consumption modes) mimicking the gastric digestion under standardized conditions. To closely observe and compare the vertebrates’ and invertebrates’ TM stability, we aimed to perform the specific antibody based western blot analysis with two primary antibodies; ❶Rabbit anti shrimp TM antibody (invertebrates), and ❷ Rabbit anti human TM antibody (species reactivity to vertebrates). Methods: Thermal treatment of selected samples to compare TM heat stability, Standardized static in vitro methods of simulated gastric digestion[4] for the evaluation and comparison of TM resistance to pepsin, Sodium Dodecyl Sulfate-Polyacryl amide Gel Electrophoresis (SDS-PAGE) of digesta supernatant under reducing and non-reducing conditions to quantify proteins and compare thermally treated invertebrates and vertebrates protein profiles focusing on TM, specific antibody based semi dry Western blot analysis. Results and discussions: SDS-PAGE analysis of vertebrates and invertebrates’ samples showed a range of proteins in varied amounts between 10-250 kDa. Depending upon samples, varied numbers of prominent protein bands were observed including the distinct bands corresponding with the molecular weights of TM(37-39kDa). In agreement with publications, TM was, indeed, resistant against pepsin digestion as well as thermal treatment prominently in case of invertebrates. This was confirmed upon Ab based Western blot analysis. Our results show that, upon thermal treatment, TM is partially degraded as is observed in case of raw and cooked beef electrophoretic profile as well as WB analysis. Significantly, upon pepsin digestion, TM (allergen) is completely degraded in vertebrates in contrast to the invertebrates’ TM (which is pepsin resistant and heat stable). This result provides an insight on the differences in digestibility of allergenic versus non-allergenic TM in real food matrix and upon thermal treatments of solid food samples. Methods: Thermal treatment of selected samples to compare TM heat stability, Standardized static in vitro methods of simulated gastric digestion[4] for the evaluation and comparison of TM resistance to pepsin, Sodium Dodecyl Sulfate-Polyacryl amide Gel Electrophoresis (SDS-PAGE) of digesta supernatant under reducing and non-reducing conditions to quantify proteins and compare thermally treated invertebrates and vertebrates protein profiles focusing on TM, specific antibody based semi dry Western blot analysis. Results and discussions: SDS-PAGE analysis of vertebrates and invertebrates’ samples showed a range of proteins in varied amounts between 10-250 kDa. Depending upon samples, varied numbers of prominent protein bands were observed including the distinct bands corresponding with the molecular weights of TM(37-39kDa). In agreement with publications, TM was, indeed, resistant against pepsin digestion as well as thermal treatment prominently in case of invertebrates. This was confirmed upon Ab based Western blot analysis. Our results show that, upon thermal treatment, TM is partially degraded as is observed in case of raw and cooked beef electrophoretic profile as well as WB analysis. Significantly, upon pepsin digestion, TM (allergen) is completely degraded in vertebrates in contrast to the invertebrates’ TM (which is pepsin resistant and heat stable). This result provides an insight on the differences in digestibility of allergenic versus non-allergenic TM in real food matrix and upon thermal treatments of solid food samples

Comparative digestomics of Tropomyosin of vertebrates and invertebrates in real food matrix

Shellfish, is a highly nutritive food resource in the world, but also among the eight allergic food groups accounting for approximately 90% of all immunoglobulin E food allergies worldwide [1]. This work focuses on the only well-recognized major allergen muscle protein tropomyosin(TM) that is responsible for cross reactivity between shellfish and other invertebrates [2]. By contrary, TM of vertebrates (chicken, pig, cow) is not a prominent allergen. The stability of food allergens to digestion is an important factor contributing to their allergenicity. Most in vitro digestibility studies are based on the protein extract rather than whole food matrix thus overlooking its effect on TM stability [3]. Our objective was to primarily test the pepsin digestibility of invertebrates and vertebrates (raw and thermally treated based on their real life consumption modes) mimicking the gastric digestion under standardized conditions. To closely observe and compare the vertebrates’ and invertebrates’ TM stability, we aimed to perform the specific antibody based western blot analysis with two primary antibodies; ❶Rabbit anti shrimp TM antibody (invertebrates), and ❷ Rabbit anti human TM antibody (species reactivity to vertebrates). Methods: Thermal treatment of selected samples to compare TM heat stability, Standardized static in vitro methods of simulated gastric digestion[4] for the evaluation and comparison of TM resistance to pepsin, Sodium Dodecyl Sulfate-Polyacryl amide Gel Electrophoresis (SDS-PAGE) of digesta supernatant under reducing and non-reducing conditions to quantify proteins and compare thermally treated invertebrates and vertebrates protein profiles focusing on TM, specific antibody based semi dry Western blot analysis. Results and discussions: SDS-PAGE analysis of vertebrates and invertebrates’ samples showed a range of proteins in varied amounts between 10-250 kDa. Depending upon samples, varied numbers of prominent protein bands were observed including the distinct bands corresponding with the molecular weights of TM(37-39kDa). In agreement with publications, TM was, indeed, resistant against pepsin digestion as well as thermal treatment prominently in case of invertebrates. This was confirmed upon Ab based Western blot analysis. Our results show that, upon thermal treatment, TM is partially degraded as is observed in case of raw and cooked beef electrophoretic profile as well as WB analysis. Significantly, upon pepsin digestion, TM (allergen) is completely degraded in vertebrates in contrast to the invertebrates’ TM (which is pepsin resistant and heat stable). This result provides an insight on the differences in digestibility of allergenic versus non-allergenic TM in real food matrix and upon thermal treatments of solid food samples. Methods: Thermal treatment of selected samples to compare TM heat stability, Standardized static in vitro methods of simulated gastric digestion[4] for the evaluation and comparison of TM resistance to pepsin, Sodium Dodecyl Sulfate-Polyacryl amide Gel Electrophoresis (SDS-PAGE) of digesta supernatant under reducing and non-reducing conditions to quantify proteins and compare thermally treated invertebrates and vertebrates protein profiles focusing on TM, specific antibody based semi dry Western blot analysis. Results and discussions: SDS-PAGE analysis of vertebrates and invertebrates’ samples showed a range of proteins in varied amounts between 10-250 kDa. Depending upon samples, varied numbers of prominent protein bands were observed including the distinct bands corresponding with the molecular weights of TM(37-39kDa). In agreement with publications, TM was, indeed, resistant against pepsin digestion as well as thermal treatment prominently in case of invertebrates. This was confirmed upon Ab based Western blot analysis. Our results show that, upon thermal treatment, TM is partially degraded as is observed in case of raw and cooked beef electrophoretic profile as well as WB analysis. Significantly, upon pepsin digestion, TM (allergen) is completely degraded in vertebrates in contrast to the invertebrates’ TM (which is pepsin resistant and heat stable). This result provides an insight on the differences in digestibility of allergenic versus non-allergenic TM in real food matrix and upon thermal treatments of solid food samples

Fatty acids composition of the most common bivalves in Korean diet

Consumption of bivalve molluscs, such as oysters, mussels, clams and scallops, makes a significant part of the daily Korean diet. Bivalves provide high quality proteins with all the dietary-essential amino acids, lipids, vitamins, minerals and other bioactive nutrients, which offer a variety of health benefits to the consumer [1]. This food contains less than 5 percent of total fat, so it is considered a low-fat food. Beside the amount of total fat, the proportions of saturated, monounsaturated and polyunsaturated fatty acids (FA) (S, M and P, respectively), as well as ratio of n-3 (ω-3) and n-6 (ω-6) P in food are very important for the health diet [2]. Fourteen species of bivalves Anadara broughtonii (AB), Ruditapes philippinarum (Manila clam (RP)), Tegillarca granosa (TG), Pecten yessoensis (Yesso scallop (YS), Argopecten spp. (small scallop (SS), Chlamys farreri farreri (CF), Cyclina sinensis (CS), Leukoma jedoensis (LJ), Mytilus califorianus (MCa) Mytilus galloprovancialis (MG), Maretrix lusoria (ML), Mactra quadrangularis (MQ), Sinovacula constricta (SC) and Crassostrea gigas (Pacific oyster (PC)) were bought in two fish markets in Incheon, Korea, in order to determine FA composition using GC/EI-MS of fatty acid methyl esters (FAME). The FAME were identified by comparing their retention times with those of the FAME standards or by comparing their mass spectra with those stored in the NIST Mass Spectral Library. In the bivalve samples, 43 different FA were identified, of which 10 were S, 12 M and 13 P, other FA were 7 methyl-FA and 1 hydroxyl-FA. The P/S ratio and ω-6/ω-3 P ratio are the most significant markers of lipid composition in a healthy diet and both should be close to 1 [3]. Among analysed species, only YS and SS have P/S ratio close to 1 (1,20 and 1.16, respectively), while other species have value between 0.07 and 0.73. The obtained values for ω-6/ω-3 P ratio were from 0.008 to 0.55, which indicates that bivalve molluscs are the valuable source of ω-3 P (EPA and DHA). These ω-3 P play important roles in growth, development, and maintenance of health

Fatty acids composition of the most common bivalves in Korean diet

Consumption of bivalve molluscs, such as oysters, mussels, clams and scallops, makes a significant part of the daily Korean diet. Bivalves provide high quality proteins with all the dietary-essential amino acids, lipids, vitamins, minerals and other bioactive nutrients, which offer a variety of health benefits to the consumer [1]. This food contains less than 5 percent of total fat, so it is considered a low-fat food. Beside the amount of total fat, the proportions of saturated, monounsaturated and polyunsaturated fatty acids (FA) (S, M and P, respectively), as well as ratio of n-3 (ω-3) and n-6 (ω-6) P in food are very important for the health diet [2]. Fourteen species of bivalves Anadara broughtonii (AB), Ruditapes philippinarum (Manila clam (RP)), Tegillarca granosa (TG), Pecten yessoensis (Yesso scallop (YS), Argopecten spp. (small scallop (SS), Chlamys farreri farreri (CF), Cyclina sinensis (CS), Leukoma jedoensis (LJ), Mytilus califorianus (MCa) Mytilus galloprovancialis (MG), Maretrix lusoria (ML), Mactra quadrangularis (MQ), Sinovacula constricta (SC) and Crassostrea gigas (Pacific oyster (PC)) were bought in two fish markets in Incheon, Korea, in order to determine FA composition using GC/EI-MS of fatty acid methyl esters (FAME). The FAME were identified by comparing their retention times with those of the FAME standards or by comparing their mass spectra with those stored in the NIST Mass Spectral Library. In the bivalve samples, 43 different FA were identified, of which 10 were S, 12 M and 13 P, other FA were 7 methyl-FA and 1 hydroxyl-FA. The P/S ratio and ω-6/ω-3 P ratio are the most significant markers of lipid composition in a healthy diet and both should be close to 1 [3]. Among analysed species, only YS and SS have P/S ratio close to 1 (1,20 and 1.16, respectively), while other species have value between 0.07 and 0.73. The obtained values for ω-6/ω-3 P ratio were from 0.008 to 0.55, which indicates that bivalve molluscs are the valuable source of ω-3 P (EPA and DHA). These ω-3 P play important roles in growth, development, and maintenance of health

Bounded linear and compact operators between the Hahn space and spaces of strongly summable and bounded sequences

We establish the characterisations of the classes of bounded linear operators from the generalised Hahn sequence space hd, where d is an unbounded monotone increasing sequence of positive real numbers, into the spaces wp0, wp and wp∞ of sequences that are strongly summable to zero, strongly summable and strongly bounded by the Cesaro method of order one and index p for 1 ≤ p < ∞. Furthermore, we prove estimates for the Hausdorff measure of noncompactness of bounded linear operators from hd into wp, and identities for the Hausdorff measure of noncompactness of bounded linear operators from hd to wp0. We use these results to characterise the classes of compact operators from hd to wp and wp0. Finally, we provide an example for some applications of our results and visualisations in crystallography.Bulletin t. 153 de l'Académie serbe des sciences et des arts. Classe des sciences mathématiques et naturelles. Sciences mathematiques no 45

Effects of methimazole-induced hypothyroidism on immunohistochemical, stereomorphometric and some ultrastructural characteristics of pancreatic β-cells

The function of pancreatic β-cells is to produce and secrete insulin, a crucial hormone in carbohydrate metabolism. The transcription factor PDX1 is required for insulin gene transcription and mature β-cell function. Since this factor is regulated by triiodothyronine, a disturbance in insulin biosynthesis and/or secretion is usually related to a deficiency of this hormone. In the present study, we used methods of immunohistochemistry, stereology and electron microscopy to explore the correlation between altered thyroid status and insulin synthesis/secretion in a model of methimazole-induced hypothyroidism in rats. In hypothyroid animals fewer functional PDX1-positive β-cells were detected in the islets of Langerhans, while insulin immunostaining was stronger. Stereological analysis of β-cell granules revealed more numerous immature insulin granules in hypothyroid rats. Taken together, these data suggest that the applied treatment caused impaired insulin synthesis and secretion. Rare cells with granules characteristic for both α- and β-cells observed in hypothyroid animals could provide functional compensation for diminished insulin synthesis