bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study of exotic decay of Cs isotope close to the proton drip line
Authors: Das P. , Dattaf Ushasi , Chakraborty S. , Rahman A. , Borge M.J.G. , Tengblad O. , Andreyev A. N. , Becerril A. , Bhattacharya P. , Bhattacharyya A. , Cederkall J. , Witte H. De , Fraile L. M. , Gottberg A. , Greenlees P. T. , Harkness-Brennan L.J. , Huyse M. , Judson D.S. , Konki J. , Kurcewicz J. , Kowalska M. , Lazarus I. , Lica R. , Mandal S. , Madurga M. , Marginean N. , Marginean R. , Mihai C. , Morroquin I. , Nacher E. , Negret A. , Page R. D. , Pascu S. , Perea A. , Pucknell V. , Rahkila P. , Rapisarda E. , Rotaru F. , Ray J. , Sotty C. O. , Duppen P. Van , Vedia V. , Warr N. , Stora T. , Wadsworth R. 
Published: December 2020

Abstract
The neutron-deficient 115Cs was produced at ISOLDE, CERN by spallation reaction using 1.4 GeV proton on LaC2 target. The exotic decay modes were studied by using a charged particle array (DSSD and pad detectors) and a γ-detector array (four Clovers) at the ISOLDE decay station (IDS). In this report, results on observed β-delayed particle emission from 115Cs, a nucleus close to proton drip line, is presented. By measuring the time distribution in the delayed proton spectrum, the half-life of the ground state of 115Cs was extracted. The obtained half-life is in agreement with previous reported value. For the first time, the p-unbound states of 115Xe, obtained by measuring beta-delayed protons from 115Cs is reported.
A High-Resolution Study of the 110Tc → 110Ru → 110Rh → 110Pd Decay Chain with the GRETINA Array
Authors: Jazrawi S. , Doherty D.T. , Allmond J.M. , Regan P.H. , Janssens R.V.F. , Korten W. , Zhu S. , Zielińska M. , Radford D. , Ansari S. , Auranen K. , Bucher B. , Carpenter M.P. , Catford W.N. , Hadyńska-Klek K. , Henderson J. , Hendricks M. , Komorowska M. , Kondev F.G. , Lauritsen T. , Li J. , Lotay G. , Napiorkowski P.J. , Padilla-Rodal E. , Pardo R.C. , Rasco B.C. , Reviol W. , Sarantites D.G. , Seweryniak D. , Santiago-Gonzalez D. , Savard G. , Singh P. , Stolze S.M. , Vondrasek R. , Wilson G. , Wu C.Y. , Wu J. 
Published: December 2020

Abstract
Spectroscopic data, such as precise γ-ray branching and E2/M1 multipole-mixing ratios, provide vital constraints when performing multi-dimensional Coulomb-excitation analyses. Consequently, as part of our new Coulomb-excitation campaign aimed at investigating the role of exotic non-axial (triaxial) deformations in the unstable refractory Ru-Mo isotopes, additional beta-decay data was obtained. These measurements make use of ANL’s CARIBU facility, which provides intense beams of radioactive refractory isotopes along with the excellent efficiency and angular resolution of the GRETINA γ-ray tracking array. In this article, we report on the analysis of the A = 110 decay chain, focussing on the identification of previously unreported states in 110Ru following the decay of 110Tc.
Fine structure of the isoscalar giant monopole resonance in 48Ca
Authors: Olorunfunmi S.D. , Usman I.T. , Carter J. , Pellegri L. , Molema P.T. , Sideras—Haddad E. , Neveling R. , Smit F.D. , Adsley P. , Donaldson L.M. , Pellegri L. , Steyn G.F. , von Neumann-Cosel P. , Pietralla N. , Arsenyev N.N. , Papka P. , Li K.C.W. , Brümmer J.W. , O’Neill G. G. , Pesudo V. , Marín—Lámbarri D.J. , Fujita H. , Tamii A. 
Published: December 2020

Abstract
Experiments investigating the fine structure of the IsoScalar Giant Monopole Resonance (ISGMR) of 48Ca were carried out with a 200 MeV alpha inelastic-scattering reaction, using the high energy-resolution capability and the zero-degree setup at the K600 magnetic spectrometer of iThemba LABS, Cape Town, South Africa. Considerable fine structure is observed in the energy region of the ISGMR. Characteristic energy scales are extracted from the experimental data by means of a wavelet analysis and compared with the state-of-the-art theoretical calculations within a Skyrme-RPA (random phase approximation) approach using the finite-rank separable approximation with the inclusion of phonon-phonon coupling (PPC). Good agreement was observed between the experimental data and the theoretical predictions.
Recent progress on hypernuclei
Authors: Gal Avraham 
Published: December 2020

Abstract
Some of last year’s progress made in hypernuclear physics is reviewed as follows: (i) resolving the

∧
5

He overbinding problem in single-Λ hypernuclei [1]; (ii) arguing that the onset of binding double-Λ hypernuclei is most likely at A=5, with the neutral systems

n

∧∧
3

and

n

∧∧
4

unbound by a large margin [2]; and (iii) revising the calculated value of the loosely bound

∧
3

H

lifetime to a level of ∼20% shorter than the free Λ lifetime [3], given recent claims from relativistic heavy ion experiments that τ(

∧
3

H

) is shorter than τΛ by as much as ≈(30±8)%. Also discussed briefly in this context is the lifetime expected for the questionable

∧
3

n

hypernucleus.
Probing low-energy QCD with kaonic atoms at DAΦNE
Authors: Tüchler M , Zmeskal J , Amirkhani A , Amsler C , Baniahmad A , Bazzi M , Bosnar D , Bragadireanu M A , Bühler P , Cargnelli M , Carminati M , Clozza A , Curceanu C , Del Grande R , De Paolis L , Fabbietti L , Fiorini C , Guaraldo C , Iliescu M , Iwasaki M , Levi Sandri P , Marton J , Miliucci M , Moskal P , Niedzwiecki S , Okada S , Piscicchia K , Scordo A , Silarski M , Sirghi D , Sirghi F , Skurzok M , Spallone A , Vazquez Doce O , Widmann E 
Published: December 2020

Abstract
X-ray spectroscopy of kaonic atoms provides a versatile tool to study the strong interaction at low energies via a direct observation of its influence on the ground state of kaonic hydrogen atoms. The SIDDHARTA experiment provided precise results on the energy shift and width of the kaonic hydrogen 1s state induced by the strong interaction. To enable the extraction of the antikaon-nucleon scattering lengths a0
and a1, SIDDHARTA-2 aims to determine the energy shift and width in kaonic deuterium with precisions of 30 eV and 75 eV, respectively. This measurement is aggravated by the low kaonic deuterium X-ray yield and a high background environment and will only be possible by implementing a severe upgrade on the SIDDHARTA apparatus.
Insights into the Origin of Mass
Authors: Roberts Craig D. 
Published: December 2020

Abstract
Atomic nuclei are the core of everything we can see. At the first level of approximation, their atomic weights are simply the sum of the masses of all the nucleons they contain. Each nucleon has a mass mN
≈ 1 GeV, i.e. approximately 2000-times the electron mass. The Higgs boson produces the latter, but what produces the nucleon mass? This is the crux: the vast bulk of the mass of a nucleon is lodged with the energy needed to hold quarks together inside it; and that is supposed to be explained by quantum chromodynamics (QCD), the strong-interaction piece within the Standard Model. This contribution canvasses the potential for a coherent effort in QCD phenomenology and theory, coupled with experiments at existing and planned facilities, to reveal the origin and distribution of mass by focusing on the properties of the strong-interaction Nambu-Goldstone modes. Key experiments are approved at JLab 12; planned with COMPASS++/AMBER at CERN; and could deliver far-reaching insights by exploiting the unique capabilities foreseen at an electron ion collider.
Simulation of a Neutron Source at the KFSH&RC CS-30 Cyclotron
Authors: Alsaidan S. , Akhdar H. , Alrumayan F. , Kezzar K. 
Published: December 2020

Abstract
The aim of this work is to optimize the parameters of the CS-30 cyclotron neutron source at King Faisal Specialist Hospital & Research Center (KFSH&RC). The CS-30 cyclotron is a positive ion machine capable of accelerating protons with internal and extracted beam currents up to 100μA and 60μA respectively. Geant4 simulation toolkit based on Monte Carlo methods was used to study and compare the energy spectra and the angular distributions of the neutrons resulting from a 26.5 MeV proton beam on a 0.5 cm thick target Beryllium-9 with a 0.15 cm Copper-63 back stop.
Slow deformation waves in an elastoplastic medium with faults
Authors: Kazakbaeva A A , Smolin I Yu 
Published: December 2020

Abstract
Slow deformation waves are excited mainly by natural processes in the Earth’s crust and lithosphere and are manifested in changes in the seismic regime and geophysical fields. There are two main types of slow deformation waves: inter-fault and intra-fault. The principal difference in the nature of the propagation of these zones is that in the case of transmission of deformation excitation from fault to fault (inter-fault wave) the speed value is in the range from 20 km/year to 30 km/year or more. If the excitation of processes occurs within a single fault zone (intra-fault wave) the speed varies from 10 km/year to 4 km/year or less. Structural maps of the model medium with faults were used to study the generation and propagation of inter-fault slow deformation waves. A mathematical model proposed by P. V. Makarov was used to perform test calculations for the generation and propagation of slow deformation waves in nonlinear elastic-plastic media. The features of the propagation of deformation waves are investigated for different fault positions in the calculation region. It is shown that the propagating fronts of slow perturbations in the medium have different shapes depending on the location of the faults in the calculation regions. The zigzag nature of the wave front is revealed in a medium with faults in the center. When fault ends are located near the boundary of the calculation region, they have a quasi planar shape.
Mathematical modeling of the formation and decomposition of a metastable product during MSHS
Authors: Lapshin O V 
Published: December 2020

Abstract
Synthesis and decomposition of nonequilibrium phases are studied in a thin-layer gas-free system that forms metastable products, using a developed mathematical model and numerical methods. The model uses the chemical transformation equation, which takes into account the possibility of the formation and decomposition of a metastable product, as well as the energy equation with the possibility of external heating and cooling of the reaction sample. The development of a chemical reaction is considered under two extremely different conditions: wave synthesis and thermal explosion. Characteristic modes of the process are found. The possibility of multiple synthesis of a metastable product, determined by external heat input and heat removal in a reacting condensed system, is shown. It is revealed that for the reaction wave propagation, three modes of formation and decomposition of metastable phases can take place: breaking, merging, and quenching.
Coated electrospun polyamide-6/chitosan scaffold with hydroxyapatite for bone tissue engineering
Authors: Niu Xiaolian , Qin Miao , Xu Mengjie , Zhao Liqin , Wei Yan , Hu Yinchun , Lian Xiaojie , Chen Song , Chen Weiyi , Huang Di 
Published: December 2020

Abstract
Polyamide-6 (PA6) is a synthetic polymer that bears resemblance to collagen in its backbone and has excellent stability in human body fluid. Chitosan (CS) with the similar structure to that of the polysaccharides existing in the extracellular matrix (ECM), has a more suitable biodegradation rate for the formation of new-bone. Electrospun fiber have nanoscale structure, high porosity and large specific surface area, can simulate the structure and biological function of the natural ECM. To meet the requirements of mechanical properties and biocompatibility of bone tissue engineering, electrospun PA6/CS scaffolds were fabricated by electrospinning technology. The mineralized PA6/CS scaffolds were obtained through immersion in 1.5× simulated body fluid (1.5SBF), which allowed the hydroxyapatite (HA) layer to grow into the thickness range under very mild reaction conditions without the need of a prior chemical modification of the substrate surface. The results showed that electrospun PA6/CS fibrous scaffolds in the diameter range of 60–260 nm mimic the nanostructure of the ECM. The tensile strength and modulus of 10PA6/CS fibrous scaffolds reach up to 12.67 ± 2.31 MPa and 95.52 ± 6.78 MPa, respectively. After mineralization, HA particles uniformly distributed on the surface of PA6/CS fibrous scaffolds in a porous honeycomb structure, and the content of mineral was about 40%. In addition, cell culture study indicated that the mineralized PA6/CS composite scaffolds were non-cytotoxic, and had a good biocompatibility and an ability to promote MC3T3-E1 cell attachment and proliferation.
Comparing productivity and feed-use efficiency between organic and conventional livestock animals
Authors: Gaudaré Ulysse , Pellerin Sylvain , Benoit Marc , Durand Guillaume , Dumont Bertrand , Barbieri Pietro , Nesme Thomas 
Published: December 2020

Abstract
Livestock animals play a key role in organic farming systems by providing nutrients for croplands through manure production and nutrient-dense food for human consumption. However, we lack global, synthetic view about livestock productivity in organic farming and about its differences with conventional farming. Here we fill this important gap of knowledge by providing a first global comparison highlighting differences between organic and conventional farming on animal productivity, feeding strategy and feed use efficiency in dairy cattle, pigs and poultry (both layers and broilers). We found (a) a 12% lower animal productivity under organic treatment, (b) significant differences in feeding strategy, especially for organic dairy cattle fed with a lower proportion of concentrate and food-competing feed than in conventional systems, (c) an overall 14% lower feed-use efficiency under organic treatment (−11% and −47% for organic dairy cattle and poultry broilers, respectively) compensated by (d) a 46% lower human-food vs animal-feed competition in organic dairy cattle. These results provide critical information on the sustainability of organic livestock management. They are also key for modelling global organic farming expansion while avoiding overestimation of organic farming production in upscaling scenarios.
Features of the structure and spread of the root system of wild species of legumes and their reaction to the level of groundwater
Authors: Abdushaeva Ya M , Shtro O V 
Published: December 2020

Abstract
Improving the feed base in the North-West region is a priority for providing farm animals with complete feeds. Perennial legumes contain nutrients that are necessary to increase the productivity of farm animals and adapted to the soil and climatic conditions of the region. Legume plants in the composition of grass mixtures form high and stable yields, are characterized by intensive growth rates after the next alienation, and are resistant to intensive hay or pasture use. Each plant species has different requirements for the biological characteristics of growth and development to the growing conditions, therefore, monitoring of species is relevant for their further conservation. For the successful realization of the potential capabilities of perennial leguminous plants, it is necessary to effectively use their gene pool of wild and cultivated species that grow in the flora of the Novgorod region. The article studies the biological and economic properties and characterizes perennial leguminous plants for cultivation in the North-West region of Russia. Laws of transformation of matter and energy within the agrogeosystem and methods for their improvement. Plant communities were identified in which perennial leguminous plants grow, which have selection value as a source material for selection. The structural features of root systems, the reaction to the groundwater level were studied, and their ecological plasticity was revealed.
The problem of vegetable protein and its solutions
Authors: Abdushaeva Ya M 
Published: December 2020

Abstract
The article provides data on improving the raw material base for high protein feeds production on the example of perennial legumes – bird’s foot trefoil, sickle alfalfa, and meadow and hybrid clover. The studied cultures are compared in terms of their vegetation phases, mowing period, chemical composition, yield of green and dry mass. The time and conditions to obtain the highest content of vegetable proteins is indicated.
Method of casein obtaining from skimmilk using oligochitosans
Authors: Alieva L R , Evdokimov I A , Lodygin A D , Sushinskaia N V , Kurchenko V P , Permyakov A V 
Published: December 2020

Abstract
The interaction of milk proteins and oligochitosans is based on formation of electrostatic complex between negatively charged casein micelles and positively charged polysaccharide groups. At low concentrations of oligochitosans, partial interaction with milk proteins occurs. Maximum protein coagulation (90 %) is achieved in equivalence zone at the concentration of oligochitosans: 45.3 kDa-0.88×10−4 M; 25.4 kDa-1.57×10−4 M; 7.7 kDa – 5.19×10−4 M; 1.5 kDa-26.67×10−4 M. In these concentrations, taking into account the molecular weight and degree of deacetylation of oligochitosans, the total content of protonated amino groups is equal 2.4×10−4 M. When t protein content in skimmed milk is 3.0 % - 3.2%, oligochitosans of any molecular weight and degree of deacetylation can be used for casein coagulation, important that the final concentration of amino groups should be 2.4×10−4 M. It was determined that the use of the studied samples of oligochitosan allows to obtain coacervate where 1 g of oligochitosan binds 6.0 – 6.2 g of milk proteins.
Monitoring the degree of contamination of milk with residual amounts of antibiotics by manufacturers
Authors: Artyukhova S I , Tolstoguzova T T , Gunkova P I , Ushakova S G , Luneva O N , Voskanyan O S 
Published: December 2020

Abstract
Over the past 20 years, there has been an increase in demand for organic agriculture products in Russia, which is associated with an increase in the popularity of healthy lifestyle. The general public is showing an increasing interest in their health and healthy nutrition, one of the important components of which is the use of environmentally friendly products. Milk and dairy products are traditionally included in the list of daily foods consumed in a “healthy” diet. The increased use of antibiotics in animal husbandry as therapeutic, prophylactic and growth-stimulating agents and non-observance of the rejection period of milk after treatment of animals are the reasons that certain lots of raw milk contain residual amounts of medicinal preparations in excess of the norm. Periodically published results of inspections by Rospotrebnadzor confirm that such excess occurs in finished dairy products of certain manufacturers. The article presents the results of a study of the safety of milk in the Omsk region, which is supplied for processing using a universal express method, which makes it possible to efficiently detect simultaneously antibiotics of four groups in raw milk in accordance with the requirements of the Technical Regulations. 3.653 samples from farms supplying raw milk from 5 districts of the Omsk region were checked; the share of rejected raw milk samples for 12 months of the study was 0.7% of all analyzed samples, this is more than 2 batches of milk per month, most of the rejected batches of milk (65%) are characterized by a higher content of the antibiotic tetracycline.
Optimization of extraction parameters of biologically active substances from dried biomass of callus, suspension cells and root cultures in vitro
Authors: Asyakina L K , Babich O O , Pungin A V , Prosekov A Yu , Popov A D , Voblikova T V 
Published: December 2020

Abstract
Objects of research are the parameters of the extraction of biologically active substances from the dried biomass of callus, suspension cells and root cultures in vitro. The goal of the work was to optimize the parameters of the extraction of biologically active substances from the dried biomass of callus, suspension cells and root cultures in vitro. Organic solvents, a water module, the duration and temperature of the extraction of biologically active substances from the dried biomass of callus, suspension cells and root cultures in vitro were studied. It was found that the optimal parameters for the extraction of biologically active substances from dried biomass of callus cultures of Rhaponticum carthamoides cells are the following: methanol as a solvent, water module 1:10, extraction temperature 60 ° C; for Rhodiola rosea: isopropanol as a solvent, water module 1:10, extraction temperature 60 ° C; for Scutellaria baicalensis: acetone as a solvent, water module 1:10, extraction temperature 50 ° C; for white cinquefoil: ethanol as a solvent, water module 1:20, extraction temperature 40 ° C; for ginseng: acetone as a solvent, water module 1: 5, extraction temperature 50 ° C. The extraction time for all medicinal plants was 60 minutes. The novelty of this work is to optimize existing modes of extraction of biologically active substances from dried biomass of callus, suspension cells and root cultures in vitro for more complete extraction and use.
On the history of forest-agrarian relations and modern socio-economic problems in the rural Novgorod region
Authors: Avdeev E A 
Published: December 2020

AbstractThe article provides historical information about the life and work of the peasant population from the middle of the 19th century reflecting significant demographic changes in the number of families of rural residents, as well as the structure of their income from various types of activities. The total income of peasant farms was not only agricultural, but also largely from trade and craft occupations, primarily from forestry. Diversification ensured year-round employment of the rural population and its sustainability. An analysis of legislative changes in recent decades has shown that a negative situation has arisen of alienation of the agricultural sector of the economy and rural residents from forest resources. They mainly began to be used only in the interests of large specialized enterprises for the harvesting and processing of wood under the auspices of a monopoly, self-controlling federal forestry agency. It is proposed to introduce a number of legislative amendments to the socio-economic life of rural residents, to restore the complexity of agriculture and forestry in the development of the provisions of the new Forest Code of the Russian Federation. It is advisable to use not only international but also historical domestic experience of self-sufficiency, self-financing, profitability of complex enterprises in agriculture and forestry that existed in the 60-70s of the 20th century, both in the Novgorod region and in other forest regions of the country.
Dynamics of symbiotic nitrogen fixation by meadow legumes at various development phases in the conditions of the Novgorod region of the North-West of Russia
Authors: Bevz S Y 
Published: December 2020

Abstract
The data on the study of the influence of the developmental phase of meadow legumes on their symbiotic nitrogen fixation are presented. It has been experimentally proved that the mowing time significantly affects the formation of the symbiotic apparatus and the accumulation of biological nitrogen. Due to symbiotic fixation on medium-acid soils of heavy texture in the first two years of life, Carmine meadow clover cultivated from the beginning of budding phase to the beginning of flowering, about 80–90 kg of nitrogen per 1 ha was accumulated, which corresponds to 57–67% of the total removal with the harvest. Such a symbiotic apparatus provided high protein feed from the main cut for hay without additional mineral nitrogen fertilizers in the range of 4.4–5.4 tons of dry weight or 19.3–22.2.2 tons of green mass per hectare. Later mowing of the grass stand led to a significant reduction in the use of biological nitrogen. The removal of biological nitrogen decreased by 1.8 times and amounted to only 45 kg per 1 ha.