bluuebunny/crossref_metadata_2025_split huggingface dataset:
ANTIADJACENCY MATRICES FOR SOME STRONG PRODUCTS OF GRAPHS
Authors: Sutjijana Aluysius , Azka Dea Alvionita 
Published: December 2023

Let G be an undirected graphs with no multiple edges. There are many ways to represent a graph, and one of them is in a matrix form, by constructing an antiadjacency matrix. Given a connected graph G with vertex set $V$ consisting of n members, an antiadjacency matrix of the graph G is a matrix B of order n \times n such that if there is an edge that connects vertex v_i to vertex v_j (v_i \sim v_j ) then the element of i^{th} row and b^{th} column of B is 0, otherwise 1. In this paper we investigate some properties of antiadjacency matrices for some strong product of two graphs. Our results are general forms of the antiadjacency matrix of the strong product of path graphs P_m with P_n for m, n\ge 3, and cycle graphs C_m with C_m for m \ge 3.
Studi Mikrofasies dan Diagenesis Batugamping Formasi Paciran, Desa Tegaldowo, Kecamatan Gunem, Kabupaten Rembang, Provinsi Jawa Tengah
Authors: Putri Salsabila Prihandoko , Hidajat Wahju Krisna , Setyawan Reddy 
Published: December 2023

Proses pembentukan batugamping ditentukan oleh proses geologi yaitu sedimentasi, morfologi bawah permukaan, pola struktur, keadaan pasca pengendapan dan lingkungan diagenesis, sehingga batugamping cukup bervariasi. Maka dari itu, penting untuk mengetahui proses diagenesis dan mikrofasies batugamping. Lokasi penelitian merupakan salah satu daerah yang memiliki keterdapatan batugamping Formasi Paciran. Hal ini menjadi dasar dilakukannya studi mengenai mikrofasies dan diagenesis batugamping pada daerah tersebut. Penelitian dilakukan dengan tujuan untuk mengetahui kondisi geologi lokasi penelitian serta determinasi mikrofasies batugamping dan proses diagenesis beserta lingkungannya. Metode yang dilakukan dalam penelitian ini meliputi studi pustaka dan pengumpulan data primer dan sekunder. Data primer berupa sampel dari pemetaan yang kemudian dianalisis geokimia dengan metode XRF dan analisis petrografi. Berdasarkan hasil penelitian didapatkan bahwa daerah penelitian tersusun atas Wackestone dan Packstone. Analisis petrografi dilakukan untuk mendeterminasi mikrofasies batugamping pada daerah penelitian yang mana termasuk dalam dua Standard Microfacies Type (SMF) yaitu SMF 10 (Bioclastic packstone grainstone with coated and abraded skeletal grains) dan SMF 8 (Wackestone and Floatstone with whole fossils and well preserved infauna and epifauna) yang merepresentasikan lingkungan pengendapan Fasies Zone 7 (Open Marine). Studi diagenesis menunjukan bahwa batugamping Formasi Paciran lokasi peneliatian telah mengalami sementasi, replacement, disolusi, kompaksi, rekristalisasi dan dolomitisasi dengan lingkungan diagenesis laut dan lingkungan burial.
SOUTHERN TASIKMALAYA ANCIENT SUBMARINE VOLCANO: VESTIGES OF ERUPTIONS AND THEIR DIVERSITY AS GEOLOGICAL HERITAGE
Authors: Djafar Agustina , Suharyogi Ifan Yoga Pratama , Sari Rahajeng Ayu Permana , Jayanti Anita Galih Ringga , Sipayung Andhy Darmeidi , Pratomo Indyo 
Published: December 2023

In the southern Tasikmalaya area West Java Province, Indonesia, there are Tertiary volcanic rocks, with an east-west trending distribution pattern. Physiographically, this area is included in the southern mountain zone of West Java and is generally composed of tuff and polymic breccias with intercalated of lava and limestone which are grouped into the Jampang Formation and Genteng Members Jampang Formation. The existence of these volcanic and sedimentary rocks of Oligocene – Middle Miocene in the area is an indication of submarine volcano. The purpose of this paper to identify traces of eruptions and submarine volcano products found in the southern Tasikmalaya area, for further assessment of the geological diversity potential as a geological heritage. The method used are field data collection and quantitative data analysis, namely identification of geological heritage based on "Technical Guidelines for the Assessment of Geological Heritage Resources". The submarine volcano products which found in this area are peperite, and basaltic andesite lava at Karang Tawulan Beach, traces of alteration, and hydrothermal mineralization like jasper Panca Tengah, and Cipatujah volcanogenic massive sulphide. This shows that volcanic activities in the southern Tasikmalaya took place continuously from Oligocene to Middle Miocene. From the results of the assessment, the geological diversity in this area has a scientific value of "medium-high".
Development of cPCR technique for detection and enumeration of Prevotella bryantii
Authors: TEPŠIČ Katarina , AVGUŠTIN Gorazd 
Published: December 2023

Competitive PCR (cPCR) system for the detection and enumeration of Prevotella bryantii cells in rumen samples was developed. PBB14 primer, specific for P. bryantii was used as the reverse PCR primer and EUB 338 bacterial primer as the forward primer. An internal DNA control, containing primer specific sequences at 5’ and 3’ ends, but lacking 41 bp at the middle of the sequence, was constructed. C-PCR products were quantified by capillary electrophoresis and the results were calculated with regression equation (Reilly and Attwood, 1998). By coamplification of P.bryantii B14 genomic DNA extracted from known numbers of cells and internal control, standard curve was constructed which enables quantification of P.bryantii cells in the range of 2.15 x 103 to 4.3 x 104 cells.
effect of ensiled maize grains on laying of hens
Authors: TKALČIČ Eva , STEKAR Jasna M.A. , KOVAČ Milena , HOLCMAN Antonija 
Published: December 2023

In the feeding trial with 600 laying hens of ISA Brown provenance the effect of ensiled maize grains on laying was examined. The laying was monitored since the age 21 weeks. At the age 32 weeks from the flock of 1400 hens 600 animals were chosen at random and divided in six groups. Trial rations were started at age 40 weeks when the hens reached the peak production. The trial had lasted for 154 days when the laying capacity started to decrease considerably. Two maize hybrids Raissa and Lotus were compared. In the ration there were 40% of dry matter from ensiled grains or 60% respectively. Supplemental feeding mixture was equal in both cases. Control animals were fed with complete feeding mixture ad libitum. Other groups fed with silage as well as one group of laying hens fed with complete feeding mixture were given restricted rations. Results of laying before and during the trial were processed by statistical package SAS/STAT (1990). There were no significant differences between the hybrids. Groups with 40% dry matter from the silage had significantly lower laying than the control group, which can be explained by lower energy content. Groups with 60% of dry matter from the silage had better laying than the groups with less silage as well as better laying in comparison with the control groups. Groups with higher metabolic energy content in trial ration had better laying. Energy and protein consumption for egg production differed a lot between the groups due to different contents of protein and energy in the rations and, hence, to diverse number of laid eggs.
Kometni preskus v modelni prehranski raziskavi
Authors: MARINŠEK-LOGAR Romana , PAJK Tanja , SALOBIR Karl 
Published: December 2023

Prehrana je pomembno povezana z nastajanjem prostih radikalov v organizmu in zaščito pred njimi. Tako na primer večkrat nenasičene maščobne kisline povečujejo obremenitev organizma s prostimi radikali. Antioksidativne snovi proste radikale nevtralizirajo. Uvedli smo kometni test (elektroforeza posameznih celic v gelu) za in vivo testiranje poškodb jedrne DNK pri laboratorijskih miših. Poskusne živali štirih skupin in kontrolne skupine so dobivale krmo enake osnovne sestave, toda vsaka z drugo vrsto maščob: 1) 10% sončničnega olja, bogatega z oleinsko kislino, 2) 10% sončničnega olja, 3) 10% ogrščičnega olja, 4) 10% svinjske masti, 5) kontrola, 2% sončničnega olja bogatega z oleinsko kislino. Oljem, masti in krmi nismo dodali nobenih antioksidantov. Energijski delež maščob v krmi je bil pri kontrolni skupini 16%, pri ostalih skupinah pa 32%. V poskusu smo ugotovili različne stopnje poškodb levkocitne DNK. Največjo stopnjo poškodb DNK (2,72) so imele miši prve skupine, ki so dobivale sončnično olje, bogato z oleinsko kislino. V kontrolni skupini je bila stopnja poškodb DNK najmanjša (1,56). Podatki so bili obdelani s programskim paketom SAS/STAT (1990). Rezultati so pokazali, da je s kometnim testom mogoče razlikovati kakovost prehranskih maščob z vidika nastajanja prostih radikalov.
Bibliometrijska analiza revije “Zbornik Biotehniške fakultete Univerze v Ljubljani. Kmetijstvo. Zootehnika”: primerjava obdobij 1986–1987 in 1996–1997
Authors: GRBEC Cvetka , JUŽNIČ Primož 
Published: December 2023

Osnovna značilnost znanstvenega obveščanja in sporočanja je objavljanje znanstvenih raziskovalnih rezultatov pretežno v znanstvenih revijah. Bibliometrija in njene metode s sistematičnim zbiranjem podatkov merijo in analizirajo te objave. Osrednji del članka zato prinaša podatke o kvantitativno merljivih lastnostih Zbornika Biotehniške fakultete Univerze v Ljubljani. Kmetijstvo. Zootehnika. Primerjalna analiza obdobij 1986–1987 ter 1996–1997 je pokazala relativno veliko število člankov s samo enim avtorjem (34,8 %, 30,3 %). V Zborniku objavljajo predvsem slovenski avtorji, ki pa v zadnjem obdobju objavljajo predvsem v angleškem jeziku (56 %, 80 %). Analiza navajanih virov kaže, da to ni edina razlika med obdobjema. Avtorji navajajo vse novejše vire, pretežno članke iz uglednih mednarodnih revij. Skoraj polovica navedenih virov v zadnjem obdobju je mlajših od pet let. Tudi obseg revij iz katerih so navedeni članki, je vse večji. Analiza navajanja kaže na večjo vključenost revije v mednarodno znanost. Vprašanje nadaljnjega razvoja revije, vzporednosti objav v slovenskem in tujem jeziku in morebiti tudi drugačnega naslova so predlogi, avtorjev uredništvu Zbornika. Dobljene rezultate bi morebiti preverili z obdelavo podatkov za širše obdobje in primerjali s podobnimi mednarodnimi revijami.
Mycoplasma synoviae haemagglutination involves immunodominant surface membrane proteins undergoing phase- size- and antigenic-variation
Authors: BENČINA Dušan , NARAT Mojca 
Published: December 2023

In the majority of Mycoplasma synoviae (MS) strains their VLHA haemagglutinins cleave into N-terminal and C-terminal parts. In MS strain ULB 925 (clone KF9) it was found that monoclonal antibodies (mAbs) 3E10, 5G6 and 4G2 recognise the C-terminal parts of its haemagglutinin, designated pMSA, as integral membrane proteins of 51 and 53 kDa. In the same MS clone mAb 125 recognized the N- terminal parts, designated pMSB, as integral membrane proteins of 47 and 49 kDa. However, in MS strain K1723 mAbs 3E10, 5G6 and 125 reacted with an uncleaved VLHA haemagglutinin of about 90 kDa. In MS strain ULB 925 clones their haemagglutinin- positive (HA+) and haemadsorption- positive (HAD+) phenotypes synthesised pMSA defined by mAbs. About 1 % of the populations which ceased to produce pMSA and produced truncated pMSB1 forms (of 27 to 30 kDa) lost the HA+ and HAD+ phenotype. The switching of the synthesis of pMSA proteins was heritable and usually reversible. In strain ULB 925 (clone KF9) certain populations which ceased to produce pMSA defined by mAb 3E10 started to produce pMSB antigenic variant, recognised by another mAb. In MS strains, besides antigenic- variation of pMSA and pMSB, their size- variants were also observed and they were recognised by antibodies of chickens infected with MS.
Determination of chemical composition, in vitro dry matter digestibility and in vitro gas production of forage by near-infrared reflectance spectroscopy
Authors: LAVRENČIČ Andrej , STEFANON Bruno , TOSO Barbara , SUSMEL Piero 
Published: December 2023

One hundred dried samples of forage, harvested three or four times during 1997 and 1999 in different morphological stages were analysed for chemical composition, in vitro dry matter digestibility (IVDMD; Tilley and Terry, 1963) and in vitro gas production (Menke and Steingass, 1988) by laboratory methods and by near infrared reflectance spectroscopy (NIRS). NIRS predicted the main chemical components, such as crude protein, crude fibre, neutral detergent fibre, acid detergent fibre, with a very high degree of accuracy (i.e. the determination coefficient (R2) varied from 93.5 % for ADF to 98,2 % for NDF), while the coefficients of determination of crude ash, ether extract and acid detergent lignin were 79.6, 85.1 and 82.3 %, respectively, with standard errors of cross validation (SECV) exceeding 9.0 %. The IVDMD was also determined with a high degree of accuracy (R2 = 94.3 %; SECV = 4.3 %), such as parameters of gas production "B" (total gas production) and "A" (constant factor describing the decay in specific gas production rate), estimated with the Gompertz model, which have R2 and SECV values of 93.0 and 3.8 % and 94.5 and 8.0 %, respectively. The parameter "C" (the specific fermentation rate) was predicted with a somewhat lower degree of accuracy (R2 = 78.3 and SECV = 9.6 %).
Butyrivibrio strains – important butyrate producing bacteria from animal gastro-intestinal tract and current taxonomic status of strains in this genus
Authors: ČEPELJNIK Tadej , MARINŠEK-LOGAR Romana 
Published: December 2023

Bacteria belonging to or resembling the genus Butyrivibrio represent a significant proportion of bacterial isolates from different mammalian gastro-intestinal tracts from all over the world. The main characteristic of this genus is production of butyric acid, which has an important role in maintaining colonic health. The rumen strains – B. fibrisolvens are also known producers of conjugated linoleic acid (CLA), bacteriocins and several hydrolytic enzymes that contribute to effective forage digestion. Genus Butyrivibrio contains isolates that are very diverse in both genomic and phenotypic properties. Different researchers have proposed the grouping of isolates on the basis of some specific characteristics but up to now none was recognised as a new species. Therefore, a complex approach is needed to set basis for new species delineation and characterisations and to define a set of reasonable diagnostic methods for their discrimination.
influence of various fiber supplements on quantity of microbial biomass in digestive tract of piglets determined by ATP-luciferase assay
Authors: FAJDIGA Sana , NEKREP Franc V. , ZRIMEC Alexis , SALOBIR Janez , MARINŠEK-LOGAR Romana 
Published: December 2023

Dietary fibre has positive effects on digestion and on gastrointestinal tract of pigs. Pigs do not possess indigenous enzymes for its digestion. Fibre is fermented by gastrointestinal microflora. The influence of different fibre sources on quantity of microbial biomass in gastrointestinal tract (GIT) of weaned piglets was studied in our experiment. First we introduced ATP-luciferase assay with pure E. coli culture, mixture of E. coli and somatic cells and samples from small and large intestine. The proper protocol for preparation of samples from GIT for ATP-luciferase assay was established. Twenty four weaned piglets, divided into four groups, were fed the same feed except the included fibre: carboxymethylcellulose (group CMC), lignified cellulose (group LIG) and pure cellulose (group CEL). The control group received starch instead of fibre (group KON). Piglets were sacrificed after 13 days of feeding and digesta samples were taken from: stomach, proximal part of small intestine, distal part of small intestine, caecum, colon and rectum together. The quantity of microorganisms in different parts of GIT was estimated by ATP-luciferase assay. The highest concentration (conc.) of microbial ATP was found in large intestine in all groups. Statistically significant effect of different fibres on conc. of microbial ATP in different parts of GIT was not demonstrated. The experiment did not provide evidence that the soluble dietary fibre (carboxymethylcellulose) would enable more intensive microbial fermentation in weaned pigs than insoluble fiber. The reason was probably in big variability and nonhomogenity of samples from GIT.
Vpliv prisotnosti zunajceličnih polisaharidov na občutljivost celic Lactococcus lactis za bakteriofagno okužbo
Authors: MIKLIČ Andreja , ROGELJ Irena 
Published: December 2023

Nekatere mlečnokislinske bakterije tvorijo zunajcelične polisaharide (EPS) z različno sestavo in strukturo. EPS so pomembni v zaščiti mikrobnih celic pred izsušitvijo, fagocitozo, antibiotiki ali drugimi škodljivimi snovmi ter fagnim napadom. Proučevali smo vpliv prisotnosti zunajceličnih polisaharidov sedemnajstih sevov Lactococcus lactis, izoliranih iz treh slovenskih mlekarn, na pripenjanje bakteriofagov. Da bi ugotovili ali imajo prisotni EPS vpliv na pripenjanje fagov, smo celice obdelali z različnimi kemičnimi sredstvi. Po obdelavi s 25 mM NaOH je bila večina izolatov občutljivih za večje število fagov kot pred njo. Ugotovili smo, da v EPS, ki jih proizvajajo proučevani izolati, prevladujejo galaktoza, glukoza in ksiloza. Največjo koncentracijo sladkorjev smo ugotovili pri izolatu PT19 (130,6 μM galaktoze in 146,9 μM ksiloze), ki je bil občutljiv le za fag ΦPT19. Domnevo, da izolati MB18, KR7, PT4, PT13 in PT19 tvorijo EPS, ki prekrijejo receptorje za fagno pripenjanje, bomo skušali potrditi v nadaljnjih raziskavah.
Nutrition of lactating women in Slovenia
Authors: ŠIRCA-ČAMPA Andreja , FIDLER MIS Nataša , HREN Irena , SEDMAK Marjeta , BRECELJ Jernej , KRŽIŠNIK Ciril , KOLETZKO Berthold 
Published: December 2023

The dietary intake during lactation plays an important role. Till now 40 lactating Slovenian women at 1–3.5 month post partum participated in the study. Dietary intakes were assessed by7-day weighted protocols and evaluated by Prodi 4.5 expert plus computer programme. The preliminary results were compared with the central European reference values for nutrient intakes (D-A-CH, 2000). We observed a too low average daily carbohydrate intake by 31 % and a too low average daily protein and fat intake by 24 %. This reflected in a relatively low daily energy intake, which was by 27 % below the recommended Central European referential values . Intakes of Mg (88 %), Fe (67 %), I (52 %), F (41 %), Vit.A (48 %), D (53 %), E (88 %), B1 (78 %), C (75 %) and folic acid (42 %) were below the D-A-CH recommended values. The ratio between SFA, MUFA and PUFA was 2.5 : 2.1 : 1. The energy intake was too low; whereas the proportion between macronutrients was adequate. The absolute and proportional intake of dietary fibre, Mg, Fe, I, F, vitamins A, D, E, B1, C and folic acid was too low, whereas the intake of saturated fatty acids was too high. Our preliminary results suggest that the diet of lactating women in Slovenia needs further attention and should be studied in more detail.
effect of fertigation on yield and quality of four white cabbage (Brassica oleracea var. capitata L.) cultivars
Authors: KACJAN-MARŠIĆ Nina , OSVALD Jože 
Published: December 2023

The influence of fertigation and broadcast mineral fertilization on yield and quality of 4 cabbage cultivars (Brassica oleracea var. capitata L.) was studied in a field trial in Ljubljana. Five treatments were formed: K – classical fertilization with 150 kg N ha-1 (broadcast incorporated); FNPK – all nutrients (NPK) were applied via fertigation; FN – P, K were added by classical methods and total N by fertigation; FNPK/30% - 30% of total N was incorporated before transplanting, total P and K and remaining N were applied via fertigation; FN/30% - total P and K and 30% of total N were incorporated before transplanting, the remainig N was applied via fertigation. During the harvest, the height and width of the cabbage, the length of stalk, weight of head with leaves and without leaves, height and width of cleaned head, firmness of head and core length were measured and the number of external trimmed leaves was counted. The largest average marketable yield was achieved by fertigation with soluble nutrients, combined with pre-plant broadcast nitrogen incorporation, with each individual cultivar as follows: Hermes F1 (38.7 t ha-1), Parel F1 (71.1 t ha-1) and Tropicana F1 (70.7 t ha-1) and the lowest by fertigation with N, where the total amount of P and K were pre-plant broadcast incorporated, with cultivars as follows: Hermes F1 (20.9 t ha-1) and Parel F1 (50.4 ha-1) and Tropicana F1 (63.0 t ha-1) and Fieldwinner F1 (66.1 t ha-1). The firmness of cabbage heads was also influenced by the method of nutrient application.
Primerjava poškodb sesajočih škodljivcev in ozona na listih klonov plazeče detelje (Trifolium repens 'Regal')
Authors: MIKUŠ Tina , GOMBOC Stanislav , BATIČ Franc , MILEVOJ Lea 
Published: December 2023

Žuželke in pršice povzročajo podobne poškodbe kot jih povzroča tudi troposferski ozon (O3) na indikatorski rastlini plazeči detelji (Trifolium repens 'Regal'). Zastavili smo poskuse v katerih smo natančno popisovali in fotografirali poškodbe 6 različnih vrst sesajočih žuželk in pršic na plazeči detelji, ki smo jih primerjali s poškodbami na listih plazeče detelje, ki so nastale kot posledica velikih koncentracij ozona. Listne poškodbe v obliki nekroz smo opazovali na občutljivih in odpornih klonih plazeče detelje na Laboratorijskem polju Biotehniške fakultete v Ljubljani od maja do septembra 1998. V laboratoriju Inštituta za fitomedicino, na Biotehniški fakulteti, v Ljubljani, smo od avgusta do konca oktobra 2001 gojili žuželke in pršice in opazovali poškodbe zaradi sesanja živalic. V poskusu so bile: navadna pršica (Tetranychus urticae Koch), tobakov resar (Thrips tabaci Lindeman), vrsta uši Nearctaphis bakeri Cowen, dve vrsti stenic Halticus apterus Linnaeus in Trigonotylus coelestialium Kirkaldy in dvopikčasti škržatek (Cicadella viridis Linnaeus). Fotografije in natančne opise poškodb, zaradi različih vrst živalic in ozona, smo primerjali, med seboj. Poškodbe, bele kloroze, ki jih povzroča stenica Halticus apterus Linnaeus so bile največje med poškodbami preučevanih škodljivcev, hkrati pa so tudi najbolj podobne poškodbam, ki nastanejo zaradi velikih koncentracij ozona. Vsi ostali preučevani organizmi povzročajo drugačne vrste poškodb.
response of sunflower to acute disturbance in water availability
Authors: GERM Mateja , URBANC BERČIČ Olga , KOCJAN AČKO Darja 
Published: December 2023

The influence of disturbance in water availability to electron flow in photosystem II was studied in five cultivars of sunflower. The results showed unaffected optimal quantum yield of photosystem II in the plants exposed to limited water supply, indicating the short-term tolerance of photosynthetic processes to acute water deficiency. Effective quantum yield of photosystem II was affected by interruption of water flow through the plants. Cultivar Labud exhibited the greatest sensitivity to water deficiency.