bluuebunny/crossref_metadata_2025 huggingface dataset:
Seni Problem Focused Coping pada Remaja: Peran Locus of Control dan Optimisme
Authors: Mujidin Mujidin , Rustam Husnul Khotimah , Nugroho Baharuddin Susilo
Published: December 2023

The absence of parents causes problems for teenagers, especially coping strategies that are not well formed. Teenagers are less able to respond to problems adaptively, such as being more aggressive, and not being able to work together. The aim of this research is to determine the role of locus of control and optimism on problem-focused coping in adolescents in orphanages. Population of this study was 129 teenagers from 3 orphanages in Yogyakarta. Sample was taken using quota sampling, amount of 59 participants (average 50.84 aged 17 years). Data was collected using three questionnaires, (1) Problem-Focused Coping Scale, (2) Locus of Control Scale, (3) Optimism scale. Data was analyzed descriptively, and statistical analysis (hypothesis testing) was carried out using multiple regression procedures with the SPSS v.23 program. The results of this study indicate that there is a role of locus of control and optimism in problem-focused coping with an effective contribution. amounting to 30.8%. Specifically, the effective contribution of locus of control is 21.9%, while the effective contribution of optimism to problem-focused coping is 15.9%. These findings provide evidence that internal locus of control and optimism are internal factors that can predict problem-focused coping ability. Ketidakhadiran orang tua di samping anak dapat menimbulkan masalah pada remaja khususnya strategi coping yang tidak terbentuk dengan baik. Remaja kurang mampu merespon masalah dengan adaptif seperti lebih agresif, tidak dapat bekerja sama dengan baik dan lainnya. Oleh karena itu, tujuan penelitian ini adalah untuk mengetahui peran locus of control dan optimisme terhadap problem focused coping pada remaja di panti asuhan. Populasi penelitian ini sebanyak 129 remaja dari 3 panti asuhan di Yogyakarta. Sampel diambil dengan quota sampling sebanyak 59 remaja (rata-rata 50,84 usia 17 tahun).  Data dikumpulkan dengan menggunakan tiga kuesioner, (1) Skala Problem Focused Coping, (2) Skala Locus of Control, (3) Skala Optimism. Data dianalisis secara deskriptif dan analisis statistik (pengujian hipotesis) dilakukan dengan prosedur regresi berganda dengan program SPSS v.23. Hasil penelitian ini menunjukkan bahwa terdapat peran locus of control dan optimisme pada problem-focused coping dengan kontribusi efektif. sebesar 30,8%. Secara spesifik, sumbangan efektif locus of control sebesar 21,9% sedangkan sumbangan efektif optimisme terhadap problem-focused coping sebesar 15,9%. Temuan ini memberikan bukti bahwa internal locus of control dan optimisme merupakan faktor internal yang dapat memprediksi problem-focused coping ability.
Assessing Faculty and Institutional Readiness for e-Learning at the University of Gondar
Authors: Abera Tadesse , Melese Tesfahun , Abera Hawltie , Worku Mustofa
Published: December 2023

The study aims to investigate whether the University of Gondar was ready for e-Learning. The study conducted a cross-sectional survey with faculty members and administrative staff. Findings showed that faculty members demonstrated readiness in technological access, confidence, and training, as well as positive attitudes towards online teaching. However, institutional readiness lacked in ICT infrastructure, administrative support, and resource support.
Izkušnje in doživljanje mater v zvezi z dojenjem in podpora diplomirane medicinske sestre v patronažnem varstvu
Authors: Berlec Valentina , Ramšak Pajk Jožica
Published: December 2023

Uvod: Prva izkušnja z dojenjem je za mater soočanje s svojim telesom, občutki in učenje ob lastni izkušnji. V tem procesu mati potrebuje podporo in zdravstvenovzgojne  nasvete zdravstvenih delavcev. Namen raziskave je bil raziskati doživljanja in izkušnje mater pri vzpostavljanju in vzdrževanju dojenja ter kako so ob tem doživljale podporo diplomirane medicinske sestre v patronažnem varstvu.Metode: Uporabljena je bila kvalitativna opisna raziskava. Na namenskem vzorcu osmih mater, ki so dojile in katerih  otroci so bili stari vsaj štiri mesece, vendar ne več kot dve leti, z različnimi poteki dojenja, so bili opravljeni intervjuji z delno strukturiranim vprašalnikom. Intervjuvanke so bile v povprečju stare 30 let. Pridobljeni podatki so bili analizirani z vsebinsko analizo.Rezultati: Identificirane so bile tri kategorije: (1) doživljanje in izkušnje mater; (2) podpora pri dojenju in (3) vključevanje diplomiranih medicinskih sester v patronažnem varstvu. Ugotovljeno je bilo, da so predstave, ki jih imajo matere o dojenju, pogosto idealizirane, in da za vzpostavitev ter vzdrževanje dojenja potrebujejo strokovno podprte informacije in podporo.Diskusija in zaključek: Matere dojenje doživljajo zelo raznoliko in individualno, predvsem pa zelo čustveno in psihično stresno, ko ne poteka, kot bi si želele. Strokovna  pomoč diplomirane medicinske sestre v patronažnem varstvu pri podpori dojenja se jim zdi zelo pomembna. Ključno je, da si ta vzame dovolj časa, da mater vodi in jo uči, kako postati samostojna pri dojenju.
ANOTHER LOOK AT A POLYNOMIAL SOLUTION FOR ALTERNATING POWER SUMS
Authors: Casinillo Leomarich F
Published: December 2023

This paper aims to provide a new general explicit polynomial solution on power sums of consecutive positive integers under alternating signs. Moreover, it examines the solution under odd and even number of terms in the series and provides some examples.
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.
A BACKTRACKING APPROACH FOR SOLVING PATH PUZZLES
Authors: Sakti Joshua Erlangga , Arzaki Muhammad , Wulandari Gia Septiana
Published: December 2023

We study algorithmic aspects of the Path puzzle--a logic puzzle created in 2013 and confirmed NP-complete (Non-deterministic Polynomial-time-complete) in 2020. We propose a polynomial time algorithm for verifying an arbitrary Path puzzle solution and a backtracking-based method for finding a solution to an arbitrary Path puzzle instance.To our knowledge, our study is the first rigorous investigation of an imperative algorithmic approach for solving Path puzzles. We prove that the asymptotic running time of our proposed method in solving an arbitrary Path puzzle instance of size $m \times n$ is $O(3^{mn})$. Despite this exponential upper bound, experimental results imply that a C++ implementation of our algorithm can quickly solve $6 \times 6$ Path puzzle instances in less than 30 milliseconds with an average of 3.02 milliseconds for 26 test cases. We finally prove that an $m \times n$ Path puzzle instance without row and column constraints is polynomially solvable in $O(\max\{m,n\})$ time.
EXPLORING PHYSICS-INFORMED NEURAL NETWORKS FOR SOLVING BOUNDARY LAYER PROBLEMS
Authors: Pratama Muchamad Harry Yudha , Gunawan Agus Yodi
Published: December 2023

In this paper, we explore a cutting-edge technique called as Physics- Informed Neural Networks (PINN) to tackle boundary layer problems. We here examine four different cases of boundary layers of second-order ODE: a linear ODEwith constant coefficients, a nonlinear ODE with homogeneous boundary conditions, an ODE with non-constant coefficients, and an ODE featuring multiple boundary layers. We adapt the line of PINN technique for handling those problems, and our results show that the accuracy of the resulted solutions depends on how we choose the most reliable and robust activation functions when designing the architecture of the PINN. Beside that, through our explorations, we aim to improve our understanding on how the PINN technique works better for boundary layer problems. Especially, the use of the SiLU (Sigmoid-Weighted Linear Unit) activation function in PINN has proven to be particularly remarkable in handling our boundary layer problems.
MATHEMATICAL MODEL OF MEASLES DISEASE SPREAD WITH TWO-DOSE VACCINATION AND TREATMENT
Authors: Manaqib Muhammad , Yuliawati Ayu Kinasih , Zulkifli Dhea Urfina
Published: December 2023

This study developed a model for the spread of measles based on the SEIR model by adding the factors of using the first dose of vaccination, the second dose of vaccination, and treatment. Making this model begins with making a compartment diagram of the spread of the disease, which consists of seven subpopulations, namely susceptible subpopulations, subpopulations that have received the first dose of vaccination, subpopulations that have received the second dose vaccination, exposed subpopulations, infected subpopulations, subpopulations that have received treatment, and subpopulations healed. After the model is formed, the disease-free equilibrium point, endemic equilibrium point, and basic reproduction number (R_0) are obtained. Analysis of the stability of the disease-for equilibrium point was locally asymptotically stable when (R_0)<1. The backward bifurcation analysis occurs when (R_C) is present and R_C<R_0. Numerical simulations of disease-free and endemic equilibrium points are carried out to provide an overview of the results analyzed with parameter values from several sources. The results of the numerical simulation are in line with the analysis carried out. From the model analysis, the disease will disappear more quickly when the level of vaccine used and individuals who carry out treatment are enlarged.
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".
Analisis Hidrogeokimia Air Tanah di Kabupaten Rembang Bagian Barat, Jawa Tengah, Indonesia
Authors: Putri Maya Aiko Salsabila , Hartanto Fandika Virgiawan , Fadilah Amar Jihad , Putranto Thomas Triadi
Published: December 2023

Kabupaten Rembang merupakan sebuah kabupaten yang terletak di pesisir Provinsi Jawa Tengah yang tersusun atas Aluvium, Formasi Lidah, Anggota Selorejo, Formasi Paciran, Formasi Mundu, Formasi Ledok, Formasi Wonocolo, Formasi Bulu, Formasi Ngrayong, dan Formasi Tawun. Kabupaten Rembang dan sekitarnya berada pada Zona Non CAT, yang tersusun oleh badan air permukaan, dan beberapa lapisan akuifer. Penelitian ini bertujuan untuk menganalisis hidrogeokimia air tanah di Kabupaten Rembang. Analisis hidrogeokimia dilakukan pada 30 titik minatan, meliputi 8 mata air, 14 sumur bor, 8 sumur gali. Hasil pengujian hidrogeokimia di laboratorium menunjukkan nilai pH air tanah sebesar 7.0 – 7.9. Nilai DHL air tanah sebesar 518 – 7290 μS/cm. Nilai TDS sebesar 345–4860 mg/L. Hasil plot Diagram Stiff menunjukkan adanya enam tipe air tanah (Kalsium Bikarbonat, Natrium Bikarbonat, Natrium Klorida, Magnesium Bikarbonat, Kalsium Sulfat, dan Kalsium Klorida), sedangkan hasil plot Diagram Piper menunjukkan bahwa seluruh sampel masuk ke dalam fasies alkaline earth water predominantly hydrocarbonate. Hasil plot Diagram Gibbs menunjukkan bahwa seluruh sampel masuk ke dalam kategori rock dominance. Berdasarkan analisis hidrogeokimia air tanah, daerah penelitian memiliki kualitas air tanah yang baik untuk digunakan dalam kegiatan sehari-hari.
SENZORIČNE LASTNOSTI CELIH TOPLOTNO OBDELANIH PIČANCEV RAZLIČNIH PROVENIENC
Authors: ŽLENDER Božidar , HOLCMAN Antonija , RAJAR Alenka , VADNJAL Robert , KOVAČ Milena
Published: December 2023

Namen raziskave je bil proučiti vpliv provenience pitovnih piščancev in spola živali na senzorično kakovost celih piščancev po toplotni obdelavi. Za poskus smo odbrali po osem piščancev (4 jarkice in 4 petelinčke) treh tujih provenienc: arbor acres (AA), avian (A), ross (R) in dva križanca domače provenience: prelux-bro1 (PB1) in prelux-bro2 (PB2). Po zakolu in zmrzovanju smo piščance toplotno obdelali s postopkom pečenja pri 190o C do središčne temperature v prsih Ts=80o C, nakar je bila opravljena senzorična analiza celih piščancev: barva, tekstura, mastnost in aroma kože, ter skupni vtis po kompletni analizi mesa beder in prsi. Rezultati so pokazali, da provenienca piščancev značilno vpliva na barvo in skupni vtis, deloma tudi na mastnost kože. Najboljšo barvo imajo piščanci A, najslabšo PB1, ki so bili hkrati najmanj mastni. Na teksturo in aromo kože pečenih piščancev provenienca ni vplivala. Petelinčki so za večino senzoričnih lastnosti značilno višje ocenjeni kot jarčke, z izjemo arome kože, ki se med spoloma ni razlikovala. Očiten je tudi značilen vpliv ocenjevalcev na ocene senzoričnih lastnosti.
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.
Uporaba oligonukleotidnih sond in pretočne citometrije za analizo bakterijske združbe v bioloških čistilnih sistemih
Authors: LIPOGLAVŠEK Luka , AVGUŠTIN Gorazd
Published: December 2023

Proučevanje združbe mikroorganizmov v aktivnem blatu z obstoječimi mikrobiološkimi metodami predstavlja nerešljiv problem, kadar želimo ugotavljati ne le število vseh mikroorganizmov v vzorcu temveč tudi število bakterij specifičnih bakterijskih subpopulacij. Opisali smo metodo za hitro analiziranje aktivnega blata z uporabo dveh različno označenih oligonukleotidnih sond in pripadajočih detektorjev fluorescence pretočnega citometra. S pomočjo sond EUB338-Cy3 in fD1-FITC, specifičnih za vse bakterije, smo postavili model in ga preizkusili s 16S rRNK sondo NSO190-FITC, specifično za kemolitotrofne oksidatorje amonija iz b - podskupine proteobakterij. Ugotovili smo, da je bilo v vzorcu 16,3% bakterij, ki jih prepozna omenjena sonda. Kot možno izboljšavo smo preizkusili učinek tripansko modrega na avtofluorescenco in fluorescenco s sondami hibridiziranih celic. Tripansko modro zniža raven zelene avtofluorescence in nespecifične fluorescence, ne vpliva pa na fluorescenco specifično hibridiziranih celic.
25th aniversary of research rept. of the Biotechnical fac. of Univ. of Ljubljana. Agricultural issue. Zootechny
Authors: STEKAR Jasna M.A.
Published: December 2023

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Modeli z naključno regresijo
Authors: MALOVRH Špela , KOVAČ Milena
Published: December 2023

Proizvodnost plemenskih živali je pogosto merjena v zaporednih intervalih, kot so lastnosti mlečnosti, rasti, zauživanje krme in zunanjost. Meritve, zbrane ob različnem času ali na različnem mestu, so med seboj odvisne. Njihova povprečja in standardni odkloni se s časom spreminjajo in korelacije so odvisne od oddaljenosti med meritvami. Modeli z naključno regresijo (MNR), ki opisujejo proizvodne funkcije, v povezavi s kovariančnimi funkcijami, ki zajamejo časovno oz. prostorsko odvisnost komponent (ko)variance, so najprimernejši za analizo take vrste podatkov. MNR smo primerjali z modeli za laktacijske zaključke, modeli z intervali in z modeli s sistematsko regresijo po virih. Za ponazoritev smo uporabili podatke slovenske populacije črno-belih krav. MNR boljše opišejo biološko ozadje proizvodnosti živali v času in omogočajo selekcijo tako na raven kot obliko proizvodnih funkcij. Dovoljujejo gibljivejši postopek preskusa in s tem znižanje stroškov pri zbiranju podatkov. Plemenske vrednosti lahko napovemo pred koncem laktacije, kar skrajšuje generacijski interval, pogostejši izračuni pa so lahko tudi v pomoč pri vodenju reje.
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.
Razvojni trendi v slovenskem kmetijstvu
Authors: KOVAČIČ Matija , UDOVČ Andrej
Published: December 2023

V prispevku so predstavljeni razvojni trendi v slovenskem kmetijstvu na podlagi statističnih podatkov popisa prebivalstva v letu 1991 in popisa kmetijstva v letu 2000. Predstavljena so predvidevanja o trendih gibanja števila kmetij ter razvoju velikostne, socio-ekonomske in proizvodne strukture kmetij po letu 2010. Razvojni scenarij predvideva nadaljnje zmanjševanj števila kmetij in ob tem povečevanje njihove velikosti, ki pa bo še vedno daleč pod EU povprečjem. Ravno tako se predvideva oblikovanje štirih skupin kmetij: čiste profesionalne kmetije, klasične mešane kmetije, kmetije z dopolnilno dejavnostjo in dopolnilne kmetije.
Mikrorajonizacija vinorodnega okoliša Goriška brda
Authors: RUSJAN Denis , KOROŠEC-KORUZA Zora
Published: December 2023

Mikrorajonizacija je pomembnejši ukrep za izkoriščanje pozitivnih ter blaženje negativnih vplivov podnebnih razmer pri gojenju vinske trte. Vinorodno območje s tradicionalnim gojenjem vinske trte ter z značilnimi podnebnimi razmerami lahko poimenujemo 'terroir'. V okolišu Goriška brda smo v letih 2000 in 2001 spremljali vremenske in ovrednotili podnebne razmere ter njihove indekse in koeficiente. Povprečne vrednosti heliotermičnega indeksa po Huglin (2457), vsote efektivnih temperatur po Winkler (4002), heliotermičnega koeficienta po Branas (5,9), termičnega koeficienta po Kerner (11,9), hidrotermičnega koeficienta po Seljaninov (2) in bioklimatskega indeksa (3) potrjujejo primernost območja Brd za gojenje vinske trte. Okoliš je trenutno razdeljen na 16 vinorodnih krajev in 2 legi. Predlagamo razdelitev na največ 4 vinorodne kraje in sicer Dobrovo, Neblo, Vipolže ter Cerovo-Kojsko. Za posamezno sorto moramo znotraj posameznega vinorodnega kraja ovrednotiti optimalen način gojenja. Glede na rezultate lahko vinorodni okoliš Goriška brda poimenujemo s 'terroir'.
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.
Milena Perušek (1893-1978) - prva slovenska uradno nastavljena fitopatologinja
Authors: MAČEK Jože
Published: December 2023

V sestavku je na kratko prikazano življenje in delo prve slovenske, uradno nastavljene (banovinske) fitopatologinje Milene Perušek (1893-1978), ki je bila doslej v biografskem slovstvu (razen imena in priimka) docela, v fitopatološkem slovstvu pa tudi skoraj docela prezrta. Njeno fitopatološko delo je bilo sicer večinoma rutinsko, bila pa je zanesljivo med prvimi slovenskimi ženami, ki je dosegla doktorat filozofije, ki je tedaj veljal tudi za naravoslovne znanosti.
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.
Identifikacija potencialnih nosilcev razvoja sadjarstva v Sloveniji
Authors: VADNAL Katja , ALIČ Vesna , ZIHERL Petra
Published: December 2023

Prispevek predstavlja rezultate empirične raziskave, katere cilj je bil ugotavljanje razlik v ocenjevanju  pomena ključnih dejavnikov odločanja (poslovni cilji, zaznavanje tržnih razmer in vzvodov ter dejavnikov konkurenčnosti) med slovenskimi sadjarji. Raziskava je bila izvedena po metodi ankete z osebnim spraševanjem vseh, v register sadovnjakov vpisanih pravnih in fizičnih oseb. Z metodo faktorske analize so identificirali ključne spremenljivke pri opazovanih indikatorjih, na podlagi katerih so z metodami razvrščanja v skupine identificirali tipične skupine opazovanih sadjarjev. Rezultati kažejo, da se glede na cilje sadjarji delijo v dve skupini: ciljno orientirani in ciljno dezorientirani. Njihove zaznave tržnih razmer in trga določajo trije faktorji: trženjska konkurenčnost, organizacija pridelovalcev in tržna moč kupcev, po katerih jih je mogoče deliti v tri skupine: pristaše organizacije pridelovalcev, usmerjene h kupcu in netržno usmerjene. Razumevanje dejavnikov konkurenčnosti pojasnjujeta dva faktorja, upravljanje in sredstva, ki delita opazovane sadjarje v tri skupine: sadjarji tradicionalisti, sadjarji previdneži in sadjarji podjetniki. Potencialni nosilci razvoja so sadjarji podjetniki, ki so ciljno orientirani in usmerjeni h kupcu ali k organizaciji pridelovalcev. Teh je 38 % vseh sadjarjev, vpisanih v register sadovnjakov.
Modeliranje fenološkega razvoja pri rastlinah
Authors: ČREPINŠEK Zalika , KAJFEŽ-BOGATAJ Lučka
Published: December 2023

Proučevali smo možnosti napovedovanja fenološkega razvoja gojenih in samoniklih rastlin na osnovi meteoroloških spremenljivk v Sloveniji za obdobje 1955-2000. Povezanost med fenološkim razvojem in meteorološkimi spremenljivkami smo proučevali s korelacijsko analizo in z multiplo linearno regresijo. Vrednosti korelacijskih koeficientov med nastopom fenofaz ter povprečji temperatur zraka dveh ali treh zaporednih mesecev pred nastopom fenofaz so bile visoke (0,60 do 0,85). Statistično značilne so bile tudi korelacije med zimskim indeksom severno atlantskega nihanja in povprečno temperaturo zraka od decembra do marca ter nastopom pomladanskih fenofaz, na čas pojava večine fenofaz v obravnavanih letih količina padavin ni imela značilnega vpliva. Spodnjo temperaturo praga za izračun termalnega časa smo določili s statistično metodo najmanjšega standardnega odklona temperaturnih vsot; variabilnost izračunanih vsot med leti je bila velika (10% do 30%). Uporaba fototermalnega časa za Ljubljano je značilno izboljšala delež pojasnjene variabilnosti v primerjavi s termalnim časom. Z metodo multiple linearne regresije smo oblikovali fenološke in fenoklimatske modele za napoved nastopa fenofaz. Izmed obravnavanih rastlin so bili najboljši fenološki indikatorji breza, regrat ter divji kostanj. S fenološkimi modeli smo lahko pojasnili med 50% in 79%, s fenoklimatskimi pa v povprečju 86% variabilnosti. V fenoklimatskih modelih so bile največkrat vključene meteorološke pojasnjevalne spremenljivke termalni čas, povprečne mesečne temperature ter za Ljubljano v vseh primerih fototermalni čas. Izdelane modele smo preverili z metodo navzkrižnega preverjanja, modelne napovedi so bile dokaj natančne in možne za najmanj pet dni vnaprej.
case study of Chinese agro-technical extension system
Authors: MEI Linhai
Published: December 2023

The purpose of the paper is to provide a better understanding of organizational patterns and service functions of Chinese AES (Agriculture Extension System) through dissecting the real live situations of extension organization at county level. By analyzing present institution and organizational constitution, the following points are discovered: extension system at county level is completed in organization and strong in functions. Administrative interventions in most extension activities and financial deficiency are primary barriers to develop client-orient extension methods. Too fragmented system and inflexible methods are principal reasons for lowering efficiency and effectiveness of extension performance. Improving farmers’ decision-making ability and promoting farmers’ participation in extension activities are expected.
Cross compliance of the Water Framework and Nitrate directives in Slovenia
Authors: GLOBEVNIK Lidija , PINTAR Marina , BREMEC Urška
Published: December 2023

We describe the first characterisation of the Slovene waters and show cross compliance of the Nitrate and Water Framework Directives in Slovenia. Point and disperse sources of pollution are identified, hydrological and morphological pressures to surface water bodies evaluated and impact of all pressure to water bodies analysed. Agricultural activities in Slovenia are described and results of calculation of nitrogen and phosphorus balance in the catchment areas of the water bodies presented. The analyses show that hydro-morphological and chemical pressures from point pressures and diffused pollution from agriculture are the main reasons for the non-attainment of environmental objectives. Though consumption of mineral fertilisers and plant nutrients in Slovenia has reached more or less steady state in the last years, the quantities are still too high to reduce the risk to water environment. Therefore, the measures for reasonable fertiliser applications should be developed into more details as to give more directions for a farm level management. Miscellaneous instruments should also be developed to initiate overall sustainable use of fertilisers and plant nutrients in agriculture.
Slovene guidelines for expert based fertilization in a light of cross compliance rules
Authors: MIHELIČ Rok , SUŠIN Janez , JAGODIC Anton , LESKOŠEK Mirko
Published: December 2023

Slovenian rules and regulation concerning fertilization are briefly presented. Current use of fertilizers, manures and compost, as well as nitrogen and humus balances in Slovene agriculture, and soil supply level with phosphorus and potassium dependent on various soils uses is given and critically stressed. Target values and fertilization norms for major plant nutrients as well as basic set of parameters and methods for national soil fertility- and fertilization control are proposed.
Legal frame of water protection in Slovakia
Authors: GABORIK Stefan , TORMA Stanislav
Published: December 2023

It is necessary to invest the maximal effort for protection of all elements of environment including water for securing of quality living conditions for next generations. Each country creates its own legislative background that tries to regulate the actions, which cause or can cause an unasked status in water quality and quantity. Except this it is necessary to monitor also the areas that can influence the water quality. The agriculture production belongs to these actions that really can pollute the water sources, especially when the farmers do not respect the specific rules in farming, mainly in the areas in so-called vulnerable zones. Therefore it was created the set of rules and principles that have their substance in laws and acts. The scope of these rules is gradually to reach the wanted status in water protection in two ways – form of controls and form of farmer education