bluuebunny/crossref_metadata_2025_split huggingface dataset:
Plant growth promoting effects of indigenous rhizosphere and endophytic bacteria on soil fertility and black pepper (Piper nigrum) yield at Bangka Belitung
Authors: Gusmaini  , Kartikawati A , Nurhayati H , Sarwendah M 
Published: January 2020

Abstract
Black pepper cultivation in Bangka Belitung is commonly followed a shifting cultivation method. This is due to the low soil fertility. The study aimed to obtain the best combination and concentration of indigenous rhizosphere and endophytic bacteria to improve soil fertility and enhanced growth and yield of black pepper. The study was set up in a complete randomized block design, 9 treatments and 3 replications. The treatments were the combinations of the types and concentrations of the bacterial isolates, i.e. (1) Control, (2) Endophytic bacteria A, (3) Combination of Endophytic bacteria B + Bb. chosinensis+ Rhizobacteria A, (4) Combination of Rhizobacteria B + Endophytic bacteria A+ Endophytic bacteria C, (5) Combination of Endophytic bacteria B + Endophytic bacteria C + Endophytic bacteria D at 105 and 108 cpu ml−1 respectively. Endophytic bacteria were capable to boost the growth and yield of black pepper, also improved the soil chemical properties. The best treatment combinations were the mixture of of bacteria, i.e. (1) Psedomanas sp.+ Brevibacillus sp+Mesorhizobium sp., (2) Bb. sp1 +Bb. sp2+Bacillus sp., and (3) Brevibacillus sp +Bb sp1+Bacillus sp. The study implies that rhizosphere and endophytic bacteria are potential to be developed for reducing fertilizer use in black pepper cultivation.
Heterosis for number of fruits and seed yields in jatropha (Jatrophacurcas L.)
Authors: Purwati R D , Anggraeni T D A , Marjani  
Published: January 2020

Abstract
Jatropha production is still low, thereforedevelopment of high-yielding varieties by hybridization is needed This study aimed to determine heterosis and heterobeltiosis in jatropha and estimate the mode of gene action. The hybridizations were carried out between two improved population and one provenance, well known as high yield genotypes as female parents, and 18 provenances indicating high oil content as male parentsat Karangploso Experimental Station, Malang, East Java in 2010. In 2011, F1 seeds were planted in Asembagus Experimental Station, Situbondo, East Java and then were selected with criteria high fruit number and seed yield. The selected F1, were clonally multiplied using stem cutting and were planted in 2012 for evaluation purposes. The results showed that theheterosis and heterobeltiosis values from hybrid jatrophawere varied. The crossing between HS49 X SP65, HS49 X SP54, HS49 X SP103, IP3P X SP7, IP3A X SP65 and IP3A X Sp 89 demonstrated high significant positive heterosis and heterobeltiosis values. These hybrids could be used as materials for developinghigh-yielding varieties. The potence ratio of jatrophahybridwas found positively overdominance gene action which could be useful information for future jatropha breeding program.
The relationship of some characteristics of peat with oil palm basal stem rot (BSR) caused by Ganoderma in peatlands
Authors: Supriyanto  , Purwanto  , Poromarto S H , Supyani  
Published: January 2020

Abstract
Indonesia as the largest palm oil producer in the world, has the large percentage of oil palm on peatland, always associated with the issue of global warming that has triggered climate change. The serious problems of cultivating oil palm on peatland is the presence of BSR disease caused by Ganoderma. There are no effective methods to control this disease. Biological control is an environmentally friendly alternative method focus, but on peatland, the development of this method is constrained by lack of information about the effect of peat environmental factors. This study aims to determine the effect of the characteristics and biological environment of peat on the intensity of Ganoderma attacks on oil palm. The relationship between the intensity of Ganoderma attacks, characteristics of peat, and biological properties of peat was carried out by correlation test. The correlation analysis showed that the groundwater level and the pH has correlated with Ganoderma attacks. While the biological properties showed no significant correlation, except Summed Dominant Ratio of vegetation which tends to positively correlate to the number of Ganoderma antagonists. These results indicate that peatland water table management and vegetation management by maintaining the diversity of vegetation around oil palm can help reduce Ganoderma attacks.
Soil chemical properties affecting GHG emission from paddy rice field due to water regime and organic matter amendment
Authors: Ariani M , Pramono A , Purnariyanto F , Haryono E 
Published: January 2020

Abstract
Paddy rice field is the main contributor of greenhouse gas (GHG) (CH4 and N2O) emissions in Indonesia. The actions to mitigate these emissions and maintain yield have being a serious concern. This study aims to investigate the emission of CH4 and N2O and determine the limiting factors of CH4 and N2O emission due to water regime and organic matter (OM) amendment in inceptisol soil. Treatments consist of two factors, the first factor was water regime, e.g., 1) continuously flooded, and 2) Alternate wetting-drying (AWD). The second factor was organic matter amendment, e.g., 1) with OM 3 t ha-1, and 2) without OM. The results showed that the addition of organic matter to the soils alongside managing its water regime with AWD resulted in low daily CH4 emissions compare to continuous flooded. No significant difference (p<0.05) in daily N2O emission between AWD and continuous flooded. The dynamic of C-org, Eh, Fe2O3, MnO2 in the soil due to water regime were affected daily CH4 emissions, while pH, NO3 and NH4 were affected daily N2O emissions. Results of this study can be used for further research and development of a model on CH4 emission from rice fields to determine feasible soil management in GHG mitigation.
Traditional development of water conservation based on local knowledge: coping with climate change impacts in rural areas
Authors: Kristiyanto  
Published: January 2020

Abstract
The aim of this research is more to understand how to local people in strengthening the capability of water scarcity to availability, mainly in hilly areas is the one place that susceptible to climate change impacts, which drought is the one problem on the dry season in rural areas. The “Jamban systems” is the one model type developed as adaptation process in meeting the demand of family or social community-scale, which each of the people tried of taking advantage water scarcity optimally, where they were tried to be managed of the water scarcity in the surroundings of their dwelling finely and continually. A qualitative research study and purposive sampling were used to data collection, alongside reinforced by the direct observation and in-depth individual interview method, which were at least 25 respondent and it’s based on ecosystem types. The result of this research shown that the most of local people have utilized water kindly, optimal, and sustain in their alive, which it’s also optimized used to water scarcity by employing of type, alongside its part of adapting and mitigating process to climate change impacts dynamically.
On tuning the cytotoxicity of Ti3C2 (MXene) flakes to cancerous and benign cells by post-delamination surface modifications
Authors: Jastrzębska A M , Szuplewska A , Rozmysłowska-Wojciechowska A , Chudy M , Olszyna A , Birowska M , Popielski M , Majewski J A , Scheibe B , Natu V , Barsoum M W 
Published: January 2020

Abstract
Despite intensive research on the application of two-dimensional (2D) materials, including MXenes, in nanomedicine, the knowledge concerning the mechanisms responsible for their observed bio-effects is far from being understood. Here we present insight into the mechanism of toxicity in vitro of the 2D Ti3C2 MXene. The most important results of this work are that using simple, inexpensive, post-delamination treatments, such as ultrasonication or mild thermal oxidation it is possible to ‘tune’ the cytotoxicity of the Ti3C2T
z
flakes. Sonication of Ti3C2T
z
flakes, or sonication followed by mild oxidation in the water at 60 °C, renders them selectively toxic to cancer cells as compared to non-malignant ones. It relates to the appearance of superficial titanium (III) oxide (Ti2O3) layer corresponding to the type of post-treatment. The presence of surface-Ti2O3 results in a noticeably higher generation of oxidative stress compared to pristine 2D Ti3C2. Our findings give evidence that the sonication and thermal treatments were successful in changing the nature of the surface terminations on the Ti3C2T
z
surfaces. This study makes a significant contribution to the future rationalized surface-management of 2D Ti3C2 MXene as well as encourages new rationalized applications in biotechnology and nanomedicine.
Bullet points:
1. First study on 2D Ti3C2 MXene superficially oxidized to titanium (III) oxide i.e. Ti2O3.
2. By sonication Ti3C2Tz MXene flakes followed by mild thermal oxidation in the water at 60 °C for 24 h, it is possible to ‘tune’ the toxicity of the flakes to cancerous cell lines.
3. Decreases in cell viabilities were dose-dependent.
4. Highest cytotoxic effect was observed for thermally oxidized samples.
5. The thermally oxidized samples were also selectively toxic towards all cancerous cell lines up to 375 mg l−1.
6. Reactive oxygen species generation was identified as a mechanism of toxicity.
A mathematical modelling of preheated accumulative roll bonded Al-Al2O3 composite sheet
Authors: Younis Abdelrahman , Farahat Ahmed I Z , Abu-Oqail Ahmed , Essa A R S , EL-Nikhaily A E , El-Shenawy Eman H 
Published: January 2020

Abstract
Accumulative roll bonding (ARB) technique is used in this paper to produce aluminum/alumina composite sheets. Alumina content was added as 1,3 and 5wt%. The produced Al/Al2O3 composite sheets are piled up and processed by accumulative roll bonding (50% reduction) after preheating at 280 °C with different regimes (2–8 cycles). Statistical design analysis was applied to examine the effects of alumina content and no. of accumulative roll bonding cycles on the ultimate tensile strength for aluminum/alumina composite sheets. Empirical formulas were deduced to recognize key parameters that controlling tensile behavior. XRD detection was carried out to explore dominant planes controlling plasticity Al/Al2O3 composites. In general, addition of alumina and proceeding different cycles increases strength. FE-SEM microstructure showed that alumina plays important roll on the aluminum sheets during ARB process where the metal of aluminum flow among them producing highly sheared matrix.
Exploring the effect of Co concentration on magnetic hyperthermia properties of CoxFe3−xO4 nanoparticles
Authors: Yasemian Ahmad Reza , Almasi Kashi Mohammad , Ramazani Abdolali 
Published: January 2020

Abstract
Although enhanced ferrite nanoparticles (NPs) have been envisioned for use in future biomedical applications, less attempt has been made to tailoring and optimizing their detailed magnetic properties and specific loss power (SLP) values. Herein, CoxFe3−xO4 (0 ≤ × ≤ 1) NPs are synthesized using a co-precipitation method at 80 °C in the presence of air atmosphere. The effect of varying Co concentration on crystalline, morphological, magnetic and hyperthermia properties is also investigated in detail. Hysteresis loop measurements showed an increase in coercivity (Hc) from 7.75 to 340.50 Oe, and a decrease in saturation magnetization (Ms) from 59.10 to 32.70 emu g−1 with increasing x = 0 (pure magnetite) to x = 1 (pure Co ferrite), respectively. In addition to confirming the hysteresis loop results, first-order reversal curve (FORC) analysis estimated a 52% decrease in superparamagnetic (SP) fraction. Hyperthermia measurements carried out under an alternating magnetic field with intensity of 400 Oe and a frequency of 400 kHz showed an increase in SLP from x = 0 to x = 0.4, and a decrease in SLP for 0.4 < × ≤ 1. SLP was maximized at 395 W g−1 for the intermediate concentration of x = 0.4. The optimized heat generation of Co0.4Fe2.6O4 NPs comprising approximately 50%–50% SP–ferromagnetic fractions may result from the simultaneous contribution of the three following mechanisms: hysteresis loop loss, Brownian and Neel relaxation together with relatively high Hc and moderate Ms.
Selection criterion of material filling in ridge grooves for reducing cross-sectional deformation of double-ridged rectangular bent tube
Authors: Liu Chunmei , Liu Yuli 
Published: January 2020

Abstract
In order to satisfy the further improvement of new communication equipment, filling the ridge grooves on side walls with fillers is the effective method to improve the quality of double-ridged rectangular bent tube in H-typed rotary draw bending. However, how to choose appropriate material filling in ridge grooves to reduce deformation more effectively is a critical issue. Therefore based on the reliable FE models of H-typed rotary draw bending and twice-springback of double-ridged rectangular tube with fillers with different material parameters, a selection criterion of the material of filler to minimize the cross-sectional deformation of bent tube was studied. The selection criterion is that only the height size accuracy of filler should be made sure to be consistent with that of the ridge groove. The strength coefficient K of filler should be considered firstly, and the larger K can reduce the deformation more effectively. The yield strength σ
s and hardening exponent n can be considered secondly, and filler with higher σ
s or smaller n can be selected as far as possible. Elastic modulus E may not be taken into account. The reliability of this selection criterion is verified by using 65Mn spring steel filler.
Effect of substrate temperature on structure, magnetic and electrical transport properties of Mn1.60Ga films
Authors: Zhang Yumei , Yang Chaoqun , Wang Li , Bai Yidan , Liu Sitong , Li Haibo 
Published: January 2020

Abstract

L10-MnGa alloys have great application potential in the fields of permanent magnet and spintronics. L10-Mn1.60Ga thin films were prepared on MgO (100) substrates by magnetron sputtering under different substrate temperatures ranging from 200 to 600 °C, and the effect of the substrate temperature on the structure, magnetic and electrical transport properties of the films were observed. The results show that the films deposited at 300–600 °C substrate have good (001) orientation. The coercivity and effective anisotropy of film are enhanced at 400 °C substrate temperature, because the large tensile stress/strain induces a large coercivity and high effective anisotropy. When the substrate temperature increases to 500 °C, and the abnormal Hall resistivity of the film reaches the maximum value. The magnetic and electrical transport properties of the L10-Mn1.60Ga film are improved effectively with an appropriate substrate temperature.
Study of milling process basics for the biocompatible PEEK material
Authors: Li Yang , Cheng Xiang , Ling Siying , Zheng Guangming , Liu Huanbao , He Lei 
Published: January 2020

Abstract
Polyetheretherketone (PEEK) material has attracted attentions and studies in the medical field due to its excellent properties suitable for orthopedic, dental, and implant applications. In order to acquire the needed geometrical accuracy and surface finish for individual customizations of components made of PEEK material, milling process basics for PEEK material have been studied in this paper. The influences of milling parameters on milling forces and surface roughness are discussed based on single-factor and orthogonal milling experiments. It shows that the effects of cutting parameters on cutting forces are basically in accordance with that in the classical metal cutting theory. But the effects of cutting parameters on the surface roughness are different. Also the significance sequences of the key milling parameters on milling forces and surface roughness are identified. Furthermore, a finite element simulation model to estimate the milling force is established and successfully evaluated for customized applications.
High coherence collapse of a hybrid III–V/Si semiconductor laser with a large quality factor
Authors: Gomez S , Huang H , Duan J , Combrié S , Shen A , Baili G , de Rossi A , Grillot F 
Published: January 2020

Abstract
The high-speed dynamics of a hybrid distributed feedback semiconductor laser heterogeneously integrated onto silicon is experimentally investigated in the presence of external optical feedback. The laser fabrication relies on a proper modal engineering in which light is generated in the III–V material and stored in the low-loss silicon region in order to substantially enhance the quality factor of the cavity resonator. In this work, the hybrid laser is found to be insensitive to parasitic reflections leading to a 10 Gbps floor-free transmission with a power penalty no greater than 1.5 dB at room temperature. As a conclusion, owing to the large quality factor, a high coherence collapse level is unveiled in such laser indicating its vast potential to serve as an alternative solution for the development of isolator-free applications in future photonics integrated circuits. A qualitative interpretation is also provided by linking the standard feedback equations to the quality factor of the resonator.
PISA-SPARKY: an interactive SPARKY plugin to analyze oriented solid-state NMR spectra of helical membrane proteins
Authors: Weber Daniel K , Wang Songlin , Markley John L , Veglia Gianluigi , Lee Woonghee 
Published: January 2020

Abstract

Motivation
Two-dimensional [15N-1H] separated local field solid-state nuclear magnetic resonance (NMR) experiments of membrane proteins aligned in lipid bilayers provide tilt and rotation angles for α-helical segments using Polar Index Slant Angle (PISA)-wheel models. No integrated software has been made available for data analysis and visualization.

Results
We have developed the PISA-SPARKY plugin to seamlessly integrate PISA-wheel modeling into the NMRFAM-SPARKY platform. The plugin performs basic simulations, exhaustive fitting against experimental spectra, error analysis and dipolar and chemical shift wave plotting. The plugin also supports PyMOL integration and handling of parameters that describe variable alignment and dynamic scaling encountered with magnetically aligned media, ensuring optimal fitting and generation of restraints for structure calculation.

Availability and implementation
PISA-SPARKY is freely available in the latest version of NMRFAM-SPARKY from the National Magnetic Resonance Facility at Madison (http://pine.nmrfam.wisc.edu/download_packages.html), the NMRbox Project (https://nmrbox.org) and to subscribers of the SBGrid (https://sbgrid.org). The pisa.py script is available and documented on GitHub (https://github.com/weberdak/pisa.py) along with a tutorial video and sample data.

Supplementary information
Supplementary data are available at Bioinformatics online.
Sex differences and higher upper normal limits for left atrial end-systolic volume in individuals in their mid-60s: data from the ACE 1950 Study
Authors: Rønningen Peter Selmer , Berge Trygve , Solberg Magnar Gangås , Enger Steve , Nygård Ståle , Pervez Mohammad Osman , Orstad Eivind Bjørkan , Kvisvik Brede , Aagaard Erika Nerdrum , Røsjø Helge , Tveit Arnljot , Steine Kjetil 
Published: January 2020

AbstractAimsThe current study aimed to describe normal values of left atrial (LA) volumes and LA emptying fraction (LAEF) in a large sample in their mid-60s from the general population and to explore sex differences.Methods and resultsIn the Akershus Cardiac Examination (ACE) 1950 Study, body surface area-indexed LA maximum (LAVimax) and minimum (LAVimin) volumes and LAEF were measured in 3489 individuals aged 63.9 ± 0.6 years from the general population. A healthy group of 832 individuals was defined. Data are presented as mean ± standard deviation (SD) and a normal range of mean ± 2 SD. T-tests were used for comparisons. In the healthy group, mean LAVimax was 25.5 ± 6.2 mL/m2 and the normal range was 13.1–37.9 mL/m2. Men had significantly larger body surface area-indexed volumes than women, but there was no difference in LAEF. The mean LAVimax for healthy men was 26.4 ± 6.5 mL/m2, for healthy women 24.9 ± 5.8 mL/m2 (P &lt; 0.001) and the upper normal limits were 39.4 and 36.5 mL/m2, respectively. In the healthy group, 13.0% of all men and 5.4% of all women had LAVimax above the current upper normal limit of 34 mL/m2.ConclusionA large proportion of healthy individuals, in particular men, had LAVimax &gt;34 mL/m2. Our findings suggest that the recommended cut-off may be too low at the age of 65 years and above and that sex-specific cut-offs should be considered.
Serial changes of tricuspid regurgitation after anatomic repair for congenitally corrected transposition
Authors: Furuya Tsubasa , Hoashi Takaya , Shimada Masatoshi , Imai Kenta , Komori Motoki , Kurosaki Kenichi , Fujimoto Kazuto , Ichikawa Hajime 
Published: January 2020

Abstract

OBJECTIVES
The aim of this study was to reveal the serial changes in tricuspid regurgitation (TR) after anatomic repair for congenitally corrected transposition of great arteries.

METHODS
Between 1995 and 2018, 48 patients underwent anatomic repair (atrial/arterial switch in 14 patients, atrial switch and Rastelli in 34 patients). The mean age and weight of the patients during anatomic repair was 33 (interquartile range 21.8–62.1) months and 12 (10.3–16.3) kg. The preoperative TR was less than mild in 15 patients (31.3%), mild-to-moderate in 29 patients (60.4%) and more-than-moderate in 4 patients (8.3%). Ebsteinoid dysplasia of the tricuspid valve (TV) was observed in 7 patients (14.6%). During the study period, no patient underwent TV surgery or bidirectional Glenn anastomosis at the time of anatomic repair.

RESULTS
There was 1 in-hospital death and 1 late death. The follow-up was completed by other surviving patients, with a median follow-up period of 12.1 years (5.9–18.1). The overall survival, reoperation-free survival and freedom from permanent pacemaker implantation rate at 15 years were 94.3%, 74.3% and 81.5%, respectively. The mean TR grade was 2.0 (1.0–2.6) preoperatively, 2.0 (1.0–2.0) at 1 year, 2.0 (2.0–2.0) at 5 years and 2.0 (2.0–2.0) at 10 years after anatomic repair. A Cox proportional hazards model showed that association of Ebsteinoid dysplasia of the TV, type of anatomic repair and previous pulmonary artery banding did not affect freedom from death or the more-than-moderate TR rate. There were 2 patients who underwent TV surgery after the anatomic repair for severe TR; TV repair was successfully done for 1 patient, the other required semi-closure of TV and one and one-half ventricle conversion.

CONCLUSIONS
TR remained subclinical or improved in the majority of patients after anatomic repair without TV repair. However, there were a few patients whose TR progressed to severe or massive, then required TV surgery after anatomic repair. Although exposure was difficult, TR was sometimes repairable following atrial switch, otherwise, one and one-half ventricle repair conversion would be the choice of treatment.