Present Experiments Research Articles

Effect of Foliar Application of Nano Urea, Boron and Zinc Sulphate on Growth, Yield and Quality of Guava (Psidium guajava L.) cv. Allahabad Surkha

The present experiment entitled “Effect of Foliar Application of Nano Urea, Boron and Zinc Sulphate on Growth, Yield and Quality of Guava (Psidium guajava L.) cv. Allahabad Surkha” was conducted at Department of Horticulture, Naini Agricultural Institute, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj during the session 2022 - 2024. The experiment was laid out in randomized block design with three replications, and the study consists of ten treatment combinations including control. The best treatment was T9 (Nano urea 2.0% + zinc sulphate 0.6% + boron 0.6%) & T8 (Nano urea 2.0% + zinc sulphate 0.4% + boron 0.4%) which shows the highest values in all the parameters viz., number of flower/tree (86.47), Days taken to fruit harvesting (49.19), fruit set (74.00%), Number fruit/tree (63.25), Fruit length (7.42 cm), fruit weight (178.73g), fruit diameter (7.12 cm), fruit yield/tree (11.29 kg). Increased flowering, fruit yield and quality might be due to the increased absorption of nutrients when given as foliar application.

Effects of intellectual humility in the context of affective polarization: Approaching and avoiding others in controversial political discussions.

Affective polarization, the extent to which political actors treat each other as disliked outgroups, is challenging political exchange and deliberation, for example, via mistrust of the "political enemy" and unwillingness to discuss political topics with them. The present experiments address this problem and study what makes people approach, and not avoid, potential discussion partners in the context of polarized political topics in Germany. We hypothesized that intellectual humility, the recognition of one's intellectual limitations, would predict both less affective polarization and higher approach and lower avoidance tendencies toward contrary-minded others. Across four preregistered online-survey experiments (N = 1,668), we manipulated how intellectually humble a target person was perceived and measured participants' self-reported (topic-specific) intellectual humility. Results revealed that participants' intellectual humility was consistently negatively correlated with affective polarization. Additionally, intellectual humility of both the target person and the participants was beneficial, and sometimes even necessary, to make participants approach, and not avoid, the target person. Intellectual humility was more important than moral conviction, opinion, and opinion strength. Furthermore, the effects on approach and avoidance were mediated by more positive expectations regarding the debate, and the effects on future willingness for contact by higher target liking. Our findings suggest that intellectual humility is an important characteristic to enable political exchange as it leads to seeing political outgroups more positively and to a higher willingness to engage in intergroup contact. Implications for intergroup contact of political groups as well as ideas for future research are discussed. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Evaluation of the Therapeutical Effect of Matricaria Chamomilla Extract vs. Galantamine on Animal Model Memory and Behavior Using 18F-FDG PET/MRI.

The memory-enhancing activity of Matricaria chamomilla hydroalcoholic extract (MCE) is already being investigated by behavioral and biochemical assays in scopolamine-induced amnesia rat models, while the effects of scopolamine (Sco) on cerebral glucose metabolism are examined as well. Nevertheless, the study of the metabolic profile determined by an enriched MCE has not been performed before. The present experiments compared metabolic quantification in characteristic cerebral regions and behavioral characteristics for normal, only diseased, diseased, and MCE- vs. Galantamine (Gal)-treated Wistar rats. A memory deficit was induced by four weeks of daily intraperitoneal Sco injection. Starting on the eighth day, the treatment was intraperitoneally administered 30 min after Sco injection for a period of three weeks. The memory assessment comprised three maze tests. Glucose metabolism was quantified after the 18F-FDG PET examination. The right amygdala, piriform, and entorhinal cortex showed the highest differential radiopharmaceutical uptake of the 50 regions analyzed. Rats treated with MCE show metabolic similarity with normal rats, while the Gal-treated group shows features closer to the diseased group. Behavioral assessments evidenced a less anxious status and a better locomotor activity manifested by the MCE-treated group compared to the Gal-treated group. These findings prove evident metabolic ameliorative qualities of MCE over Gal classic treatment, suggesting that the extract could be a potent neuropharmacological agent against amnesia.

Effect of Fruit Bagging on the Yield and Quality of Rainy Season Guava (Psidium guajava) cv Allahabad Safeda

The present experiment was conducted at Department of Horticulture, Naini Agricultural Institute, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj during the session 2022 - 2024. The experiment was laid out in randomized block design, and the study consists of eight treatments with three replications including control. From the present investigation, it was concluded that bagging had significant effect on fruit characters in guava. The best treatment was T3 (Yellow Polythene) which shows highest values in all the parameters viz fruit characters (fruit weight-192.09g, fruit girth- 6.39 cm, fruit diameter-6.53cm, pulp weight-74.91g, pulp percentage-89.06%, seed weight-6.22g, seed percentage-5.71% & specific gravity-1.23), quality attributes (TSS -15.32 0Brix, acidity- 0.40%, vitamin C- 161.99 mg/100g, TSS/acid ratio-37.64). Increased fruit yield and quality might be due to the increased absorption of sunlight & favorable microclimate created due to bagging.

STUDY OF THE INFLUENCE OF CONSERVATION TREATMENT ON THE CHROMATIC CHARACTERISTICS OF ARABIC MANUSCRIPTS

In the present experiment, a study was conducted to investigate the effect of conservation treatment of an Arabic manuscript on its chromatic characteristics. For this purpose, extremely valuable, unrestored manuscripts (18 - 19th century) were selected from the archives of the National Library “St. St. Cyril and Methodius”, on which spectrophotometric chromatic characteristics were measured. The research was conducted at the restoration center of the National Library. The following processes were applied to the manuscript: mechanical cleaning anddeacidification. Measurements of color characteristics were taken indifferent parts of the manuscript after each stage of the treatment: before treatment, after mechanical cleaning, after deacidification. The following parameters - CIE Lab, CIE Lch, ∆Eab, ∆E2000, ∆L, ∆c, ∆h was calculated. Based on the results obtained, the changes and effects of each of the chromatic parameters were determined.

Initiation and Carbene Induced Radical Chain Reactions in CH2F2 Pyrolysis.

High temperature dissociations of organic molecules typically involve a competition between radical and molecular processes. In this work, we use a modeling, experiment, theory (MET) framework to characterize the high temperature thermal dissociation of CH2F2, a flammable hydrofluorocarbon (HFC) that finds widespread use as a refrigerant. Initiation in CH2F2 proceeds via a molecular elimination channel; CH2F2→CHF+HF. Here we show that the subsequent self-reactions of the singlet carbene, CHF, are fast multichannel processes and a facile source of radicals that initiate rapid chain propagation reactions. These have a marked influence on the decomposition kinetics of CH2F2. The inclusion of these reactions brings the simulations into better agreement with the present and literature experiments. Additionally, flame simulations indicate that inclusion of the CHF+CHF multichannel reaction leads to a noticeable enhancement in predictions of laminar flame speeds, a key parameter that is used to determine the flammability of a refrigerant.

Neutrino Lorentz invariance violation from cosmic fields

From a cosmological perspective, scalar fields are well-motivated dark matter and dark energy candidates. Several possibilities of neutrino couplings with a time-varying cosmic field have been investigated in the literature. In this work, we present a framework in which violations of Lorentz invariance (LIV) and CPT symmetry in the neutrino sector could arise from an interaction among neutrinos with a time-varying scalar field. Furthermore, some cosmological and phenomenological aspects and constraints concerning this type of interaction are discussed. Potential violations of Lorentz and CPT symmetries at present and future neutrino oscillation experiments such as IceCube and KM3NeT can probe this scenario.

Visual behavior of racing bike cyclists in multi-tasking situations

Distracted biking can have serious repercussions for the rider such as accidents. The purpose of the present experiment was to determine the effect of visually monitoring two parameters, the cadence, and the heart rate on a bike computer fixed on a racing bike, and simultaneously detect hazardous traffic situations. Individuals (n = 20) were instructed to ride a racing bike that was fitted onto a roller trainer. After conducting a bicycle step test to assess the maximal heart rate (HFmax), participants were assigned to a within subject-design on a separate day. They were instructed to perform the riding task in two single-task conditions (only watching the traffic at the video with occluded or without occluded bike computer), two multi-tasking conditions (monitoring the cadence of 70 RPM or 90 RPM, monitoring the heart rate, and observing the traffic) and one control condition (no instructions). Percentage dwell time of the eye movements, the constant error from the target cadence, keeping the heart rate in an interval of 50% - 70% of the HFmax, and percentage of the recognized hazard traffic situations were analyzed. The analysis indicated that monitoring the parameters on the bike computer induced no significant decline in perceived hazardous traffic situations.

The benefits of item-method-directed forgetting

ABSTRACT The present experiments examined the encoding and retrieval conditions in an item-method-directed forget (IMDF) study that included a novel control condition. In the IMDF condition, half of the items were followed by a remember cue whereas the other half were followed by a forget cue. In a remember-both control condition, half of the items were followed by an item identifier called Set A; whereas the other half of the items were followed by a Set B identifier. At the test, items were recalled as a function of the instruction cue or the set identifier. Across two experiments, directed-forgetting effects and associated benefits were found. Further, results from both studies revealed a new way to demonstrate the benefit of IMDF – directed-forgetting participants made more correct source attributions compared to remember-both participants. These benefits were obtained using a within-subjects IMDF paradigm (Experiment 1) as well as a between-subjects IMDF paradigm (Experiment 2). These patterns of results are consistent with several current theories of item-method-directed forgetting.

Performance of Enriched Organic Manures on Head Quality, Yield, Nutrient Uptake and Economics of Sprouting Broccoli (Brassica oleracea Var. italica)

The present field experiment was carried out to study the performance of enriched organic manures containing farmyard manure, vermicompost and poultry manure on head quality, nutrient uptake and economics of sprouting broccoli during 2018-19 and 2019-20 at UBKV, West Bengal, India, which comprised of 8 treatment combinations in randomized block design with 3 replications. The results of the field experiment showed that the use of Azophos biofertilizer enriched vermicompost @ 2.5 t/ha along with Azophos biofertilizer enriched poultry manure @ 2.5 t/ha as basal + top dressing of Azophos biofertilizer enriched vermicompost @ 0.5 t/ha along with Azophos biofertilizer enriched poultry manure @ 0.5 t/ha each (T7) significantly improved the head yield (20.47 t/ha) and superior head quality in terms of the maximum TSS (8.14°Brix), vitamin A (288.97 IU/100 g) and vitamin C (90.00 mg/100 g) of organic broccoli. The greatest benefit to cost ratio (1.93) was also obtained from the treatment T7. Hence, the treatment T7 can be recommended for sustainable production of organic sprouting broccoli under terai region of West Bengal.

Effect of Different Spacing and Corm Size on Growth and Corm Production of Gladiolus (Gladiolus grandiflorus L.) cv Punjab Dawn under Malwa Plateau of Madhya Pradesh

The present experiment was carried out at Bahadari research farm of College of Horticulture, Mandsaur (Madhya Pradesh) during rabi season of 2020-21 with an aim to find out the effect of different spacing and corm size on growth and corm production of gladiolus, using the three spacing’s (S1 30 × 30 cm, S2 30 × 20 cm and S3 20 × 20 cm) and three corm sizes (C1 <3.0 cm, C2 3.0-4.0 cm and C3 >4.0 cm). The experiment was laid out in Factorial Randomized Block Design (FRBD) with three replications. The result revealed that, the plant produced from wider spacing with larger corm size (30 × 30 cm + >4.0 cm) was superior in days taken to sprouting (9.07 days), number of sprouts per hill (3.07), plant height at 60 DAP (62 cm), number of leaves per hill at 60 DAP (20.73), length of longest leaf at 60 DAP (46.47 cm), width of longest leaf at 60 DAP (2.85 cm), number of corms per hill (3.47) and weight of corms per hill (71.20 g) at maturity stage.

Target Tracking Systems on a Sphere With Topographic Information.

We consider the target tracking problem on a sphere with topographic structure. For a given moving target on the unit sphere, we suggest a double-integrator autonomous system of multiple agents that track the given target under the topographic influence. Through this dynamic system, we can obtain a control design for target tracking on the sphere and the adapted topographic data provides an efficient agent trajectory. The topographic information, described as a form of friction in the double-integrator system, affects the velocity and acceleration of the target and agents. The target information required by the tracking agents consists of position, velocity, and acceleration. We can obtain practical rendezvous results when agents utilize only target position and velocity information. If the acceleration data of the target is accessible, we can get the complete rendezvous result using an additional control term in the form of the Coriolis force. We provide mathematically rigorous proofs for these results and present numerical experiments that can be visually confirmed.

Which factors are related to crossing speed and road violations? A virtual reality study on young people’s crossing behavior.

In the literature, numerous studies examined pedestrian behavior within road environments, aiming to contribute to injury prevention. Nevertheless, significant gaps remain, particularly concerning the behavior of young individuals. The present Virtual Reality experiment aimed at two main objectives: (1) understanding the factors associated with the likelihood of young people violating traffic laws and (2) identifying factors influencing their crossing speed, who faced various pedestrian crossing scenarios designed to induce violations are administered to 63 participants aged 11-17. Three main factors are considered in the analysis: socio-economic characteristics, travel patterns, and behavioral tendencies while walking. The results reveal that students who commute on foot and those residing in larger cities are less inclined to violate traffic laws. Furthermore, individuals who report frequent real-life misconduct are more likely to disregard red lights when crossing a signalized crosswalk in the virtual environment. Differences in average crossing speeds are observed between middle school and high school students, as well as between one-lane and two-lane crossing speeds.

Biological mitigation of soil nitrous oxide emissions by plant metabolites.

Plant metabolites significantly affect soil nitrogen (N) cycling, but their influence on nitrous oxide (N2O) emissions has not been quantitatively analyzed on a global scale. We conduct a comprehensive meta-analysis of 173 observations from 42 articles to evaluate global patterns of and principal factors controlling N2O emissions in the presence of root exudates and extracts. Overall, plant metabolites promoted soil N2O emissions by about 10%. However, the effects of plant metabolites on N2O emissions from soils varied with experimental conditions and properties of both metabolites and soils. Primary metabolites, such as sugars, amino acids, and organic acids, strongly stimulated soil N2O emissions, by an average of 79%, while secondary metabolites, such as phenolics, terpenoids, and flavonoids, often characterized as both biological nitrification inhibitors (BNIs) and biological denitrification inhibitors (BDIs), reduced soil N2O emissions by an average of 41%. The emission mitigation effects of BNIs/BDIs were closely associated with soil texture and pH, increasing with increasing soil clay content and soil pH on acidic and neutral soils, and with decreasing soil pH on alkaline soils. We furthermore present soil incubation experiments that show that three secondary metabolite types act as BNIs to reduce N2O emissions by 32%-45%, while three primary metabolite classes possess a stimulatory effect of 56%-63%, confirming the results of the meta-analysis. Our results highlight the potential role and application range of specific secondary metabolites in biomitigation of global N2O emissions and provide new biological parameters for N2O emission models that should help improve the accuracy of model predictions.

Do pictures' emotional valence and arousal affect younger and older adults' narratives?

Emotional content, specifically negative valence, can differentially influence speech production in younger and older adults' autobiographical narratives, which have been interpreted as reflecting age differences in emotion regulation. However, age differences in emotional reactivity are another possible explanation, as younger and older adults frequently differ in their affective responses to negative and positive pictures. The present experiment investigated whether a picture's valence (pleasantness) and arousal (intensity) influenced older adults' production of narratives about those pictures. Thirty younger and 30 older participants produced narratives about pictures that varied in valence (positive, negative, and neutral) and arousal (high, low). Narratives were recorded via Zoom, transcribed, and analyzed with Linguistic Inquiry and Word Count-22 to get measures of emotional word use, disfluencies, and linguistic distance. Results showed that negative valence increased age differences in speech production independent of picture arousal: Relative to younger adults, older adults used more positive words, fewer negative words, and had more silent pauses when telling narratives about negative pictures. In contrast, high arousal decreased age differences such that older adults used fewer positive words in narratives about positive pictures and more linguistically distant words evidenced by fewer present-tense verbs, relative to narratives about low-arousal pictures. Contrary to an explanation of enhanced regulation or control over emotions in older adulthood, these findings support the idea that older adults' speech production is influenced by their reactivity or affective response to emotional stimuli even when the task is not to communicate one's emotions. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Prenatal transportation stress and sex influence the metabolomic profile of the liver of 28-day-old Brahman bulls and heifers

Prenatal transportation stress (PNS) reportedly induced differential DNA methylation of genes related to behavior, immune function, stress response, and metabolism in Brahman heifer and bull calves (doi:10.1093/jas/skz368). The objective of the present experiment was to conduct a metabolomics analysis of liver samples of 25-day-old beef calves to identify biochemicals and determine effects of PNS and sex classification. Mature Brahman cows artificially inseminated to the same Brahman sire were assigned to be either Control (n=35; not transported) or PNS (n=37; 2 h of transportation at 60, 80, 100, 120, and 140±5 d of gestation). Livers were obtained from 16 Control (8 bulls and 8 heifers) and 16 PNS (8 bulls and 8 heifers) calves that were humanely euthanized at 25±2 d of age. Liver samples (200 mg) were submitted to Metabolon, Inc. to identify metabolites by ultra-high-performance liquid chromatography/tandem high resolution/accurate mass spectrometry chromatography methods. An estimate of the false discovery rate was calculated and following log transformation, two-way ANOVA was used to identify significant interactions and biochemicals that differed significantly ( p ≤ 0.05). Principal component analysis (PCA) was also used to compare PNS and sex effects. A total of 851 biochemicals were identified and categorized; this report emphasizes energy pathways and lipid mediators of inflammation. PNS increased 45 metabolites and decreased 21 whereas 23 were increased and 30 decreased in bulls versus heifers. Significant interaction of PNS and sex was noted for 33 metabolites. Glucose did not differ due to PNS; however, it was increased in bulls versus heifers. Maltotriose and maltose were higher in PNS, and it was greater in heifers than bulls. Lactate was higher in bulls than heifers. Lipid mediators of inflammation were elevated in PNS calves. to our knowledge this is the first report on the liver metabolome of prenatally stressed calves. These observations suggest an influence of prenatal stress and sex on liver metabolomics within 1 month of age in cattle. USDA NIFA Award No. 2019-67015-29573. This is the full abstract presented at the American Physiology Summit 2024 meeting and is only available in HTML format. There are no additional versions or additional content available for this abstract. Physiology was not involved in the peer review process.

Standardized ileal digestible methionine requirements for 22 to 29-d-old male broilers based on the growth performance and feather development.

The aim of the present experiment was to determine the standardized ileal digestible (SID) methionine (Met) requirement during the grower phase (22 to 29 days). A total of 192 Ross 308 male broilers (745 ± 50.5 g) were assigned to six dietary treatments in a randomized complete block design, with eight replicate cages per treatment. The experimental diets were formulated based on corn, soybean meal, and synthetic amino acids (AA), with different levels of dietary SID Met ranging from 0.40% to 0.65%, in increments of 0.05%. Individual body weight and feed intake per cage were measured at the beginning and end of the experimental period. Weight gain (g/bird), feed intake (g/bird), gain-to-feed ratio (g/kg), feather weight (g), and relative feather percentage (% of body weight) were analyzed for linear or quadratic responses using orthogonal polynomial contrasts. Final body weight, weight gain, and feed intake increased quadratically as dietary SID Met concentration increased (p < 0.05). However, the composition of AA in the feathers showed no quadratic or linear effect based on dietary SID Met concentrations, except for Ile (p = 0.05; quadratic). The SID Met requirements for optimum and maximum weight gain of 22 to 29-days-old male broilers were estimated using the broken-line and quadratic-line models to 0.45% and 0.55%, respectively.

Evaluation of intrinsic and extrinsic factors affecting pregnancy rate in dual-purpose cows under tropical conditions.

Embryo transfer (ET) in bovines was created with the purpose of increasing the pregnancy rate (PR) of animals with high genetic value; however, multiple factors have been found to affect the success of this reproductive biotechnology. These factors are frequently grouped in intrinsic and extrinsic factors. Thus, the objective of the present experiments was to assess the effect of intrinsic and extrinsic factors on the pregnancy rate under tropical conditions. To do this a total of 648 embryo transfer (ET) procedures were performed between January and December 2021. The intrinsic factors were size and location of the corpus luteum, body condition, genetic group, age and parity; while extrinsic factors were location of the farm, environmental comfort, season in which the ET was carried out, prevailing weather conditions, and the preservation, quality, and the development stage of embryos at the time of ET. A χi2 was used for analysis of main effects, and logistic regression analysis to calculate the probability of pregnancy and the association between intrinsic or extrinsic factors; additionally, a multivariate analysis of data clusters was used to find a linkage between the effects. While recipient female age had a negative effect (Odds ratio = 0.345-0.871) on PR (p < 0.05), being higher in younger cows, the rest of the intrinsic factors did not affect the PR. The significant (p < 0.05) extrinsic factors were THI category, season of year and type of embryo preservation, showing that the highest PR (p < 0.05) was obtained in the comfort THI category, during the winter season and using fresh embryos for transfer. The clustering analysis did not show any linkage between PR and intrinsic factors, while a linkage (p < 0.05) was found with season of the year and embryo preservation as extrinsic factors. It is concluded that age of the recipient cow and environmental conditions at the time of the embryo transfer are key factors to be considered for a successful pregnancy rate from in-vitro ET programs using dual-purpose cows under tropical conditions.

Principles of the experiment design

Reference books usually present experiment designs as recipes, one of which should be chosen for each experiment. This approach extends to teaching and leads the researcher to understand that he is limited to the use of these experiment designs. The consequences are the adaptation of research plans to this restrict set of designs and the adoption of inappropriate designs to achieve research objectives. This approach arose from the relatively simple calculations required to analyze the results of experiments with those designs at a time when computing resources were precarious. The evolution of computing resources no longer justifies the restriction to experiment designs that require easy calculations. These resources made possible the elaboration of designs with properties appropriate for efficient experiments. This article considers the properties that constitute principles of the experiment design that must be considered when planning the experiment. Compliance with these principles allows the researcher to elaborate the most appropriate experiment design for each experiment.

Optimization Analysis of the Arrangement of the Submerged Floating Tunnel Subjected to Waves

The motion responses, mooring tensions, and submergence depth are the dominant factors for the arrangement of the Submerged Floating Tunnel (SFT) subjected to waves. Generally, the maximum values of motion responses, mooring tensions, and absolute submergence depth are mainly focused on. In the present study, experiments are implemented to measure the motion responses and mooring tensions of the SFT with different mooring patterns and submergence depths under waves with different characteristic wave heights and periods. In order to evaluate the arrangement of the SFT more effectively and comprehensively, besides the maximum values, several new characteristic parameters are introduced. Such parameters account for the motion responses in the frequency domain, the uniformity of the tension distribution, the length of time during which the cable reaches a relaxed condition during wave action, the KC number, the dimensionless period, the wave height, and the submergence depth. The results from the optimization analysis show the following: according to the characteristic values of motion responses and mooring tensions, the pattern of diagonal cables is better than that of diagonal cables + vertical cables; and within the range of the present experiments, there are optimal dimensionless parameters—the dimensionless submergence depth d0/LP ≥ 0.15, the KC number ≤ 0.8, or the dimensionless wave height Hs/d0 ≤ 0.10—for the condition of which the dynamic responses and mooring tensions vary slightly.