The communicability of the journal Acta Botanica Croatica over the 1991–2000 period

The papers published in the journal Acta botanica croatica in the period from 1991 to 2000 are analysed from a scientometric point of view. The purpose of this article is to determine the communicability of this journal through parameters such as the extent to which institutions and countries are represented in the authors of the papers, the number of citations per year measured in the SCI (Web of Science), the age of the literature quoted in terms of years, the distribution of and list of journals that cite Acta botanica croatica, and the geographical origin of the journals that cite it. Acta botanica croatica is read and available in 24 countries, it has been cited by 101 journals covered in the SCI; since 1998 original scientific papers have been written in English, and the potential accessibility of the journal has been increased. In 2000 the percentage of foreign authors publishing in the journal rose to 57%

Orthodontic Treatment of Dentofacial Deformities

Međučeljusni nesklad stvara velike probleme pacijentima i estetski i funkcionalno. Razlog dolaska pacijenata u Kliniku uglavnom je estetske naravi, jer se radi o mlađim osobama, a funkicionalne su smjetnje u drugome planu. Uzimanje hrane, govor i disanje u takvih su osoba znatno otežani. Prikazat ćemo jedan od slučajeva liječenje kombiniranoga dentofacijalnog deformiteta: PROGNATHISMUS ET LATEROGNATHISMUS MANDIBULARIS. Pacijentica, 34 godine. Iz anamnestičkih podataka nismo saznali da sličnih problema ima u obitelji. Motiv dolaska na Kliniku bio je estetske naravi, premda se je pacijentica žalila na bolove u oba čeljusna zgloba, otežano uzimanje hrane i na nešto teži izgovor pojedinih glasova. Plan liječenja donesen je na osnovi sljedećih potanko provedenih postupaka: • raščlamba lica rađena je na osnovi fotogarafija napravljenih iz profila i en face • raščlamba okluzije učinjena je na studijskim modelima • rentgenkefalometrijska raščlamba profilnog i AP kraniograma učinjena računalom i ručno samo je potvrdila već spomenutu dijagnozu Liječenje je provedeno isključivo intraoralnom i ekstraoralnim ortodontskim napravama te smo smatrali korisnim iznijeti naša iskustva ovakvim načinom liječenja. Izgled pacijentice nakon liječenja vidi se na slikama. Ponovne kefalometrijske raščlambe rađene su nakon završetka liječenja. Svi parametri su u granicama normale, kako se vidi iz tabele s prikazanim vrijednostima prije i poslije liječenja. Raščlambe mekih česti pacijentice također pokazuju znatne promjene, a odnosi nos, gornja usnica, donja usnica i brada veoma su dobri. Dentofacijalni deformiteti danas se vrlo uspješno rješavaju. Dobre studijske raščlambe, na osnovi kojih se određuje plan liječenja, jamstvo su uspješnoga liječenja. Vrlo malo je ostalo tajni u liječenju dentofacijalnih deformiteta, ali ona od terapeuta traži visoku profesionalnost i učinkovitost.Disharmony of the jaws presents a great aesthetic and functional problem for patients. The reason for reporting to a clinic is mainly of an aesthetic nature, since most commonly young people are involved, while functional disturbances remain secondary. Such persons have difficulty eating, speaking and breathing. We will present one case of combined dentofacial deformity: PROGNATHISMUS ET LATEROGNATHISMUS MANDIBULARIS. Female patient, 34 years old. From anamnestic data we did not find out whether there were similar problems in the family. The motive for reporting to the clinic was aesthetics, although the patient complained of pain in both temporomandibular joints, difficulty eating and somewhat more difficult pronunciation of certain vocals. A treatment plan was based on: • Analysis of the face, based on profile and en face photographs. • Analysis of occlusion, based on study models. • Roentgen-cephalometry of the profile and AP craniogram, performed on a computer as well as manually, confirmed the above mentioned diagnosis. The treatment was performed exclusively with intraoral and extraoral orthodontic appliances, and we therefore believe that it would be useful to present our experience with such a treatment method. The appearance of the patient after treatment can be seen on the photographs. Repeated cephalometric analyses were performed after completion of the treatment. All parameters were within normal limits, as can be seen from the table presenting pre- and post treatment values. Analysis of the soft tissues also shows significant changes, and relations between the nose, upper lip, lower lip and chin are very good. Today dentofacial deformities are successfully solved. Good study analyses, which serve as the base for planning treatment, guarantee successful treatment. There are very few secrets in ortognatic treatment, but it still requires high professionalism and effectivness

Artemisinin Story from the Balkans

The isolation is reported of artemisinin (qinghaosu), a drug remarkably effective against malaria, from the aerial parts of Artemisia annua L. (sweet wormwood) at the Department of Chemistry, University of Belgrade (now Faculty of Chemistry), Serbia by the end of 1970, almost two years before the isolation of the same compound in China

On parameterized stabilization of networked dynamical systems

The problem of stabilizing networked dynamical systems (NDS) in a scalable fashion is addressed. As a first contribution, an example is provided to demonstrate that the standard NDS stabilization methods can fail even for simple linear time-invariant systems. Then, a solution to this issue is proposed, in which the controller synthesis is decentralized via a set of parameterized local functions. The corresponding stability conditions allow for max-type construction of a Lyapunov function (LF) for the full closed-loop system, while neither of the local functions is required to be a local LF. It is shown that the provided approach is non-conservative in the sense that it is able to find a stabilizing control law for the motivating example network, whereas state-of-the-art non-centralized Lyapunov techniques fail. For input-affine NDS and quadratic parameterized local functions, the combined LF synthesis and control scheme can be formulated as a set of low-complexity semi-definite programs that are solved on-line, in a receding horizon manner

Protection of stored plant products from rodent pests using chlorophacinone

Apart from some preventive measures, advisably taken during construction of storage facilities or at the time of product storage, treatments with chemical rodenticides have been the most widely practiced method of controlling commensal rodents. Their control in storages is normally carried out after animal presence has been observed, and treatments from early autumn onwards, throughout the season, provide the best effect. The paper shows the effects of baits with lower content of the active ingredient chlorophacinone than recommended for protecting stored plant products from rodents. The experiments were set up using the relevant OEPP/EPPO method. Different contents (0.005% and 0.0075%) of the active ingredient chlorophacinone were used in a ready for use (RB) paste bait formulation. Baits were laid in boxes along rodent routes, underneath pallets with sacks and in places where major damage was observed. Baits for house mice were placed at a rate of 10-20 g per 1-3 m, while 30-50 g of baits for brown rats were laid at specific points. Daily bait intake was monitored over a period of 10 d and the portions were replaced with new ones as needed. Placebo baits were laid in identical boxes for 4 d before the experiment began. The abundance of house mice was estimated based on the highest and lowest daily intake of bait divided by the species’ daily food requirement. The data in this experiment show that 0.005% and 0.0075% chorophacinone contents in RB baits changed neither palatability nor bait efficacy in controlling house mouse and brown rat indoors. The average efficacy of chorophacinone was 87-93% against house mouse and 90-100% against brown rat. Keywords: Chlorophacinone, Rodent, Storage, Efficac

Orthognathic Surgery - Our Concept

Ortognatska kirurgija spada u skupinu estetsko-funkcionalnih operacija. Većina naših bolesnika dolazi na prvi pregled zahtijevajući promjenu izgleda. Prvi pregled je razgovor s bolesnikom i na njemu se uvijek nazočni ortodont i maksilofacijalni kirurg. Uzimaju se otisci fotografija an face i profila te telerendgen snimke. Na osnovi dobivenih podataka stvara se okvirni plan liječenja. Na drugome pregledu iznosi se plan liječenja i potanko se objašnjavaju postupci ortodontskog i kirurškog liječenja i moguće komplikacije. U razgovoru se rabi baza podataka ortognatskih zahvata i računalna simulacija. Bolesnici donose konačnu odluku te se na trećemu pregledu dogovara liječenje. Aktivno liječenje rijetko počinjemo prije sedamnaeste godine. Ovisno o planu, uključuje se oralni kirurg i počinje se s ortodontskim tretmanom. Kada je priprema za zahvat završena, ponavlja se razgovor s bolesnikom i dogovara se termin primitka. Bolesnik dolazi na bolničko liječenje pripremljen i s obavljenim anesteziološkim pregledom. Operacija je najčešće na dan primitka, a bolesnik u bolnici boravi 3 do 5 dana. Na primjerima vraćanja i izvlačenja donje i gornje čeljusti te bimaksilarnih zahvata prikazati ćemo naš pristup ortognatskoj kirurgiji.Orthognathic surgical treatment is both functional and esthetic. For most of our patients the reason for the first visit is esthetics. The first appointment is made in the combined maxillofacial and orthodontics clinic. During the first appointment we talk to the patient to get a general idea of his/her wishes and medical photographs, jaw models and X-rays are taken. After collecting all data a general plan for the treatment is made. During the second appointment we discuss our treatment plan together with details of both orthodontic and surgical therapy with the patient. In this discussion we use photographs from our data base and computer simulation. After the final patient’s decision is made, we start with the treatment. Depending on the treatment plan, it starts with either oral surgery or orthodontics. For most of the patients we do not start with treatment before seventeen years of age. After presurgical treatment is finished, we again discuss details of the operation with the patient and a hospital appointment is made. The operation is usually performed on the day of admission, and the hospital stay is 3 to 5 days. We discuss our treatment concept based on patients with the different types of skeletal deformities

Investigation of formation processes of porous biocompatible materials based on silicon doped and undoped α-calcium-phosphate and hydroxyapatite

Poslednjih nekoliko decenija, velika pažnja usmerena je na razvoj biomaterijala koji bi imali potencijal da reparišu ili zamene oštećenenih delova koštanog tkiva, pospeše funkcionisanje postojećeg ili ubrzaju stvaranje novog tkiva. Klinička primenana biomaterijala zavisi pre svega od fizičkih i hemijskih svojstava materijala. U savremene sintetičke biomaterijale se ubrajaju ex vivo ćelijama zasejani skafoldi, in vivo resorbilni koštani cementi, prevlake koje pospešuju stvaranje veze između prirodne kosti i implanta, različite forme implantnih proteza i dr. Bioaktivna keramika na bazi kalcijum-fosfata (hidroksiapatit: HA; α-kalcijum-fosfat: α-TCP; β-kalcijum-fosfata; β-(TCP) zauzima značajno mesto zbog strukturne i hemijske sličnosti sa neorganskom komponentom prirodne kosti. Jedno od najvažniji područja inženjerstva koštanog tkiva pretstavlja dizajniranje i procesiranje skafoldnih materijala po strukturi sličim kostima koji bi omogućili vaskularizaciju i urastanje koštanog tkiva. Tokom prve dekade 21. veka velika pažnja je usmerena na razvoj treće generacije bioaktivnih materijala koji bi stimulisali specifičan ćelijski odgovor. Značajnu grupa biomaterija čine materijali na bazi bioaktivnog stakla koji otpuštanjem jona u rastvoru stimulišu faktore rasta koji na kontrolisan način aktiviraju ćelijske funkcije. Cilj ove teze pretstavlja razvoj skafolda na bazi silicijumom dopiranih α-kalcijum-fosfata i hidroksiapatita za supstituciju i reparaciju koštanog tkiva koji bi kontrolisanim otpuštanjem jona silicijuma i kalcijuma i fosfatnih jona povoljno uticali na adheziju i diferencijaciju ćelija i gensku ekspresiju. U tom cilju sa procesiranje skafolda hidrotermalnim postupkom sintetisane su nedopirane i silicijumom dopirane čestice HA različite morfologije (sferne i vlaknaste). Kao polazna jedinjenja za sintezu stehiometrijskog hidroksiapatita (Ca/P = 1,67) i hidroksiapatita sa odnosom Ca/P = 1,50 korišćeni su Ca(NO3)2•4H2O, (NH4)2HPO4•2H2O, Na2EDTA (poslednje jedinjenje je korišćeno za sintezu sfernih čestica) i urea. Silicijumom dopirani hidroksiapatiti su sintetisani za odnos Ca/P = 1,50 korišćenjem tetraetil-ortosilikata (TEOS) kao izvora silicijumovih jona. Dopiranje silicijumom pri odnosu Ca/P = 1,50 je izvšeno u cilju favorizovanja formiranja silicijumom stabilisanog α-TCP i poboljšanja bioaktivnih svojstava u odnosu na stehiometrijski hidroksiapatit. Uticaj stepena supstitucije silicijumom na morfologiju, faznu transformaciju i bioaktivnost sintetisanih sfernih i vlaknastih čestica, kao i skafolda dobijenih od nedopiranih i silicijumom dopiranih čestica analiziran je rendgenskom difrakcijom (XRD), skenirajućom elektronskom mikroskopijom (SEM), transmisionom elektronskom mikroskopijom (TEM), visokorezolucionom transmisionom elektronskom mikroskopijom (HRTEM), energetskom disperzionom rendgenskom fluorescentnom spektroskopijom (EDXRF), infracrvenom spektroskopijom (IC) i u in vitro testovima u kulturi SaOs2, L929 i MRC-5 ćelija. XRD i EDXRF analiza je pokazala različiti nivo supstitucije silicijumom pri istim uslovima sinteze na sfernim i vlaknastim česticama. Takođe, utvrđeno je da dopiranje silicijumom dovodi do snižavanja temperature fazne transformacije HA u α-TCP. Ovaj efekat je izraženiji kod silicijumom dopiranih čestica HA sferne morfologije...During recent decades, a great attention has been focused on research and development of biomaterials that are exploited to replace missing body structures, to enhance functions of existing ones or promote the new tissue formation. The clinical success outcome of biomaterial used in tissue engineering applications depends critically upon physical and chemical properties of tested materials. The synthetic materials, capable of supporting the natural process of bone re-modeling, include the ex vivo generation of cell-scaffold complexes, in vivo resorbable bone cements, coatings that enhance the bonding between natural bone and implant, various forms of implantable prostheses, bone-repair agents etc. Synthetic bioactive ceramics such as certain forms of calcium-phosphate (hydroxyapatite: HA; α-tricalcium phosphate: α-TCP; β-tricalcium phosphate: β-TCP) and combinations of them have been widely studied due to their structural and chemical similarity with the inorganic components of natural bone. One of the most important stages of bone tissue engineering is to design and process scaffold materials aiming to, as high as possible, the in-growth of blood vessels, and to guide the growth of bone in a natural manner mimicking the structure of human compact bone. During the first decade of the twenty-first century third-generation of biomaterials has been designed to stimulate specific cellular responses at the level of molecular biology. Certain formulations of bioactive materials such as bioactive glasses release chemicals in the form of ionic dissolution products, or governing macromolecular growth factors, which at controlled rates, activate the cell functions. The goal of the thesis was to develop three-dimensional scaffolds based on silicon doped HA/α-TCP specifically designed for application in bone tissue engineering where, through controlled release rate of Si, Ca and P, one assure optimal influence at the biological response of material and invoke enhanced cell adhesion, differentiation and gene expression. Therefore, for scaffolds preparations silicon doped and un-doped HA particles were synthesized having different morphologies (spherical and whisker-like) using hydrothermal method. Appropriate quantities of the reactants Ca(NO3)2•4H2O, (NH4)2HPO4•2H2O, Na2EDTA (the last one being used for synthesis of spherical-like particles) and urea were used to prepare stoichiometric hydroxyapatite (Ca/P = 1.67) and hydroxyapatite of Ca/P molar ratio that approaches 1.50. The silicon-substituted apatites were prepared using a Ca/P molar ratio approaching 1.50 by adding two different quantities of tetraethyl orthosilicate (TEOS) as the source of silicon ions. Lower Ca/P ratio and doping with silicon were used in order to enhance formation of silicon-stabilized α-TCP and improve the bioactivity when compared to pure hydroxyapatite. The influence of silicon substitution level in spherical-and whisker-like particles on the morphology, phase transformations and bioactivity of the obtained powders and scaffolds based on these particles was investigated by x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), energy dispersive x-ray fluorescence spectroscopy (EDXRF), Fourier transform infrared (FTIR) spectroscopy and in in vitro test performed on SaOs2, L929 and MRC-5 cells. The investigations showed different degree of silicon substitution under the same synthesis conditions on spherical- and whisker-like particles revealed by XRD and EDXRF analyses, where higher content of added silicon enhanced phase transformation from HA to a-TCP at lower temperatures. These transformations are more pronounced on spherical particles..

Promene na jetri i bubrezima pilića hranjenih visokim nivoima natrijum selenita ili seleniziranog kvasca

The experiment was carried out with 260 chickens divided into 13 groups, for 6 weeks. All chicken groups were fed with commercial mixtures, and selenium was added in their feed in the form of sodium selenite or selenized yeast at following concentrations: 0, 2, 5, 10, 15, 20 or 30 mg Se/kg. Three birds from each group were sacrificed on the 10th, 24th and 42nd days of the experiment. All internal organs were inspected and parts of the liver and kidneys were subsequently taken for pathohistological investigations. In birds fed with 2 and 5 mg Se/kg feed in the form of sodium selenite neither pathomorphological nor pathohistological alterations in the liver or kidneys were noticed at any of the monitoring intervals. In birds fed with the higher rates of inorganic selenium (10, 15, 20 or 30 mg Se/kg feed) certain pathohistological alterations occured that were more marked with the higher concentrations of selenium in the feed or after longer duration of intake. No alterations were noticed in the mentioned organs from chickens supplied with 2, 5, 10 or 15 mg Se/kg feed in the form of selenized yeast. Alterations of liver and kidneys were encountered only in birds treated with exceptionally high levels of organic selenium (20 or 30 mg Se/kg feed). In chickens fed with 10, 15, 20 or 30 mg Se/kg feed in the form of Na2SeO3, the liver was enlarged and of a lighter coloration, while pathohistological evidence varied between intracellular edema and necrotic changes. In kidneys, edema of the renal tubules was noticed and at the highest levels vacuolization and ballooning dystrophy of cells with loss of nuclei was found. In chickens supplied with 20 or 30 mg Se/kg feed in the form of selenized yeast pathohistological changes were less marked than in those fed with the same amounts of Se in the form of Na2SeO3.Ogled je izveden na 260 pilića Hybro provenijence podeljenih u 13 grupa, u trajanju od 6 nedelja. Sve grupe pilića hranjene su komercijalnim smešama, a selen je dodavan u hranu u formi natrijum selenita ili seleniziranog kvasca u količini od 0, 2, 5, 10, 15, 20 ili 30 mg/kg. Po tri životinje iz svake grupe su žrtvovane 10., 24. i 42. dana ogleda. Izvršen je pregled svih unutrašnjih organa, a potom su uzimani delovi jetre i bubrega za patohistološka istraživanja. Kod pilića hranjenih sa 2 i 5 mg Se/kg hrane u obliku natrijum selenita nisu uočene patomorfološke ni patohistološke promene na jetri i bubrezima ni u jednom od ispitivanih vremenskih intervala. Kod pilića hranjenih sa višim nivoima neorganskog selena (10, 15, 20 ili 30 mg Se/kg hrane) uočene su određene patohistološke promene koje su bile izraženije sa povećanjem koncentracije selena i dužinom konzumiranja. U pilića koji su dobijali 2, 5, 10 ili 15 mg Se/kg hrane u obliku seleniziranog kvasca nisu ustanovljene promene na pomenutim organima. Promene na jetri i bubrezima su se javljale samo kod životinja tretiranih izuzetno visokim nivoima organskog selena (20 ili 30 mg Se/kg hrane). U pilića hranjenih sa 10, 15, 20 ili 30 mg Se/kg hrane u obliku natrijumselenita, jetra je bila uvećana i svetlije boje a patohistološki nalaz se kretao od intracelularnog edema do nekrotičnih promena. Na bubrezima je uočen edem bubrežnih kanalića, a pri najvišim dozama ustanovljena je vakuolizacija i balonirajuća distrofija ćelija sa gubitkom jedara. U pilića koji su dobijali 20 ili 30 mg Se/kg hrane u obliku seleniziranog kvasca, patohistološke promene su bile manje izražene nego kod onih hranjenih sa istim nivoima Se u obliku natrijum-selenita

The possibility of use of some essential oils in rodenticidal baits

Jokić, G., Vukša, M., Đedović, S., Stojnić, B., Kataranovski, D

Low temperature electron-spin relaxation in the crystalline and glassy states of solid ethanol

X-band electron paramagnetic resonance (EPR) spectroscopy was used to study the spectral properties of a nitroxide spin probe in ethanol glass and crystalline ethanol, at 5 - 11.5 K. The different anisotropy of molecular packing in the two host matrices was evidenced by different rigid limit values for maximal hyperfine splitting in the signal of the spin probe. The significantly shorter phase memory time, , for the spin probe dissolved in crystalline ethanol, as compared to ethanol glass, was discussed in terms of contribution from spectral diffusion. The effect of low-frequency dynamics was manifested in the temperature dependence of and in the difference between the data measured at different spectral positions. This phenomenon was addressed within the framework of the slow-motional isotropic diffusion model [S. Lee, and S. Z. Tang, Phys. Rev. B 31, 1308 (1985)] predicting the spin probe dynamics within the millisecond range, at very low temperatures. The shorter spin-lattice relaxation time of the spin probe in ethanol glass was interpreted in terms of enhanced energy exchange between the spin system and the lattice in the glass matrix due to boson peak excitations.Comment: 16 pages, 4 figures, 36 reference