Fold Test Research Articles

Consistency of spatial ability performance in children, adolescents, and young adults.

Spatial abilities are essential cognitive skills for many aspects of our everyday life that develop substantially throughout childhood and adolescence. While there are numerous measurement tools to evaluate these abilities, many of them have been designed for specific age groups hampering comparability throughout development. Thus, we determined test-retest-reliability and minimal detectable change for a set of tests that evaluate spatial ability performance in their variety in youth and compared them to young adults. Children (age: 11.4 ± 0.5 years, n = 26), adolescents (age: 12.5 ± 0.7 years, n = 22), and young adults (age: 26.1 ± 4.0 years, n = 26) performed a set of five spatial ability tests twice, 20 min apart: Paper Folding Test (PFT), Mental Rotation Test (MRT), Water Level Task (WLT), Corsi Block Test (CBT), and Numbered Cones Run (NCR). Relative and absolute test-retest reliability was determined by calculating the intraclass correlation coefficient (ICC3,1) and the standard error of measurement (SEM), respectively. Further, the minimal detectable change (MDC95%) was calculated to identify clinically relevant changes between repeated measurements. Irrespective of test, reliability was "excellent" (i.e., ICC3,1 ≥ 0.75) in all age cohorts and the SEM values were rather small. The MDC95% values needed to identify relevant changes in repeated measurements of spatial ability performance ranged between 0.8 and 13.9% in children, 1.1 and 24.5% in adolescents, and 0.7 and 20.8% in young adults. The determined values indicate that the investigated set of tests is reliable to detect spatial ability performance in healthy children, adolescents, and young adults.

Construction of MXene-mediated inorganic-organic quaternary ammonium salt-hybrid coating for fire safety and multi-mode synergistic antibacterial of cotton fabric

With the continuous development of the society, there is a growing demand for the durability, versatility and multifunction of cott fabrics. In this work, the cotton fabric is coated with multifunctional coating via dip-coating of transition metal carbide (MXene) and then encapsulation of dimethyloctadecyl [3-trimethoxysilopropyl] ammonium chloride (QAS). In view of MXene with excellent light absorption and photothermal conversion efficiency, the controllable antibacterial performance of the cotton fabric is further improved. Benefiting from the encapsulation of QAS, CF@P@M@QAS fabric shows mechanical stability (24 h washing, 1000 cycles folding test and 100 cyclic abrasion) and hydrophobicity. Meantime, the QAS on the surface of multifunctional cotton fabric significantly increases antibacterial activity, and the antibacterial rate can reach to 100 % against Staphylococcus aureus (S. aureus) and 98 % Escherichia coli (E. coli). Besides, CF@P@M@QAS cotton fabric also integrates functions of fire safety and physical therapy. Thus, this multifunctional cotton fabric based MXene offers a novel solution for extending its application in medical electronics and physical therapy.

Remagnetization of the Upper Permian–Lower Triassic limestones in the western Lhasa Terrane and its tectonic implications

SUMMARY The drift history of the Lhasa terrane plays an essential role in understanding the tectonic evolution of the Bangong-Nujiang Tethyan Ocean and the Neo-Tethyan Ocean, as well as the evolutionary history of the Tibetan Plateau. Here, a combined rock magnetic, petrographic, and palaeomagnetic study is performed on the Upper Permian–Lower Triassic limestones (∼259–251 Ma) in the western Lhasa terrane. The site-mean direction for the 28 sites is Dg = 32.1°, Ig = 50.3°, kg = 47.9 and α95 = 4.0° in situ and Ds = 342.9°, Is = 32.7°, ks = 43.2 and α95 = 4.2° after tilt-correction, yielding a palaeopole at 68.9°N, 314.4°E with A95 = 4.3°, corresponding to a palaeolatitude of 18.0° ± 4.3°N. The fold tests are not significant because the sampling section shows monoclinic features with minor variations in their bedding attitudes. The palaeopoles for the directions before and after tilt-correction are compared with reliable Late Permian–Palaeogene palaeopoles obtained from the Lhasa terrane. Based on these comparisons, the studied limestones were remagnetized prior to tilting and this remagnetization most likely occurred during the Early Cretaceous. The depositional environment of the limestones may have changed from anoxic to suboxic and oxic during the Early Cretaceous, leading to the oxidation of iron sulphide to authigenic magnetite. Meanwhile, the Late Jurassic–Early Cretaceous convergence between the western Lhasa and Qiangtang terranes may have resulted in tectonic fluid migration and the formation of calcite veins and stylolites in the limestones. This is supported by the presence of small calcite veins and stylolites in some samples, as well as the fact that the framboidal oxides were formerly sulphides (mostly pyrite), implying that the majority of the iron oxides observed in the limestones were authigenic. These processes indicate that chemical remanent magnetization caused by the growth of magnetic minerals related to tectonic fluid migration was most likely the mechanism for the limestone remagnetization.

Colorless Polyamide–Imide films with tunable coefficient of thermal expansion and their application in flexible display devices

In a previous study, our group reported the fabrication of a series of colorless polyamide–imide (PAI) films (named TFDB-DABPO-TPC-6FDA) with good thermal stability. To further improve their properties, herein, the effect of adding blocks in molecules on the performance of polyimide (PI) films was studied. By changing the order and amount of the four reactants added each time, seven PAIs with different structures and block lengths were obtained. Their glass transition temperatures (Tg) ranged from 359 °C to 368 °C, and their transmittance at 430 nm (T430) was 82.7%–85.1 %. Importantly, the coefficient of thermal expansion (CTE) of these seven PAIs decreased almost linearly from 31.1 to 18.5 ppm/K, making it possible to fabricate PI films with a desired CTE value for specific applications. Furthermore, the PAI-6-T film, which had the longest polyamide block and the best overall performance (Tg = 362 °C, CTE = 18.5 ppm/K, T430 = 83.1 %, tensile strength = 179.4 MPa, dielectric constant (Dk) = 2.53, and dielectric loss (Df) = 0.0088 at 10 GHz) was used as a substrate to fabricate a flexible printed circuit board (FPCB) and an organic light-emitting diode (OLED). Mechanical–electrical test shows that Ag was firmly bonded with the PAI-6-T film, and the resistance of FPCB@PAI-6-T only increased by 14.8 % after 150,000 folding tests. The flexible OLED@PAI-6-T exhibited pure green emission, a turn-on voltage of 3.0 V, a luminance of 1000 cd/m2 at 6 V, a current efficiency of 1.31 cd/A, and an external quantum efficiency of 0.44 %.

A Comparison of 90° Bending for Foldable Electronics

In order to assess the longevity of foldable electronics, folding or bending tests on model systems need to be performed. However, not all bending tests are created equal in that different configurations lead to different amounts of mechanical damage and thus different electrical responses. Two 90° bending instruments were compared using two model metallic thin film systems on polyimide to establish if the two seemingly similar bending tests yield the same results. The two film systems, namely 300 nm Mo and 130 nm Al on 50 nm Mo, were magnetron-sputtered on polyimide substrates and tested in the custom-built FLEX-E-TEST and the commercially available YUASA test that is capable of in situ resistance measurements. For statistics, 10–12 samples were tested of each film system on each folding device using the same applied bending strain and number of cycles. Samples were intermittently characterized with confocal laser scanning microscopy and electrical resistance to correlate the amount of mechanical damage (crack density) with the electrical normalized resistance ratio of the damaged area. The results show that even with the same bending radius, a similar but not identical amount of mechanical damage forms for both bending devices. Additionally, the resistance as a function of cycles also differs after 10,000 cycles. A closer examination of the damage, especially in the Al/Mo film system, indicates that the speed of the bending, and if the samples experience spring back, can alter the received mechanical damage. The in situ resistance data of the YUASA test were further examined and a suggestion of standardizing how folding or bending test results are reported is provided.

Serravallian–Tortonian (Miocene) folding in the Amakusa region, northern Ryukyu arc: Possible subduction resumption of the Philippine Sea Plate

AbstractEocene to Lower Miocene coal‐bearing formations in northern and western Kyushu, northern Ryukyu arc, are folded, and the horizontal compression has been attributed to the opening of the Japan Sea or to the significant movement along the Median Tectonic Line and its southwestern extension. However, the timing and implication of the folding are not well understood. To deal with these issues, we studied the Amakusa region where the folded Eocene strata with a total thickness of a few kilometers. Paleomagnetic directions of Middle Miocene intrusions and of Late Miocene lavas were measured in this study to apply the fold test to judge the relative timing of the folding and magmatism. As a result, the concentration of the directions was improved by the tilt‐correction, indicating the folding younger than the magmatism. Our detailed geological mapping revealed that the folding is older than a horizontally‐lying basaltic lava which yielded a K–Ar age of 6.8 Ma, because folded Eocene formations were truncated and unconformably blanketed by the lava. In addition, we found that some of the normal faults trending perpendicular to the folds were reactivated as transfer faults after the normal faulting which also postdated the magmatism. This reactivation is concordant with the above‐mentioned relative timing. Synthesizing geological data from surrounding regions, we conclude that the folding was probably contemporaneous with the Taiwan‐Shinji fold belt which grew in the Ryukyu and southwest Japan backarcs. Since the simultaneous compression affected not only these regions but also northeast Japan, the compression possibly resulted from the resumed subduction of the Philippine Sea Plate in the Serravallian–Tortonian time.

Folding endurance of continuous silicon carbide fibres: A comparative study

The limited folding resistance of continuous silicon carbide (SiC) fibres hinders their application as flexible, foldable materials. With this objective in mind, the folding endurance and damage properties of the second (2nd) and third (3rd) generation continuous SiC fibre tows were investigated through repeated folding tests, optical microscope observation and tensile tests. These SiC fibre tows were disassembled from two-dimensional (2D) SiC fibre braided fabrics with varying braiding angles. The braiding process can alleviate the force on fibre tows during the textile forming process. The investigation of damage mechanisms and analysis of force conditions are instrumental in optimizing structural parameters. The research findings suggested that, in comparison to the 3rd generation continuous SiC fibres, the 2nd generation SiC fibre tows demonstrated higher resistance to repeated folding. In contrast, the 2nd generation fabrics exhibited slightly lower folding endurance values. After repeated folding, the SiC fibre tows in fabrics showed the highest strength losses near the braiding angle of 37.8? to 38.3?. In comparison, the SiC fibre fabric demonstrated the lowest folding endurance values (approximately 760 times) near the braiding angle of 41? to 42?. Considering factors such as folding endurance value, the strength loss rate of fibre tows and fabric strength loss rate, it can be concluded that SiC fibres in fabrics with large braiding angles exhibit optimal performance in terms of folding endurance.

Multilayer Perceptron Performance Analysis in Liver Disease Classification

Liver disease is a liver disease caused by viruses, alcohol, lifestyle and others. Someone often does not realize or is late to know liver disease so that when examined liver disease is severe, it would be better if treatment is done early by knowing the symptoms suffered. Data mining can help diagnose liver disease more easily, especially to help doctors determine whether patients suffer from liver disease or not, with symptoms almost close to liver disease. The process of diagnosing liver disease is carried out by a classification process and the result is that the patient suffers from liver or not. This research uses a data mining classification method using an artificial neural network method, namely Multilayer Perceptron. The Indian Liver Patient Dataset (ILPD) used in this study was obtained from the UCI Machine Learning Repository. The division of the data set over the training data and test data is done by Cross Validation. Performance measurement of the method uses confusion matrix. Based on the research conducted, it was found that the application of Multilayer Perceptron resulted in varying accuracy based on testing with different Fold values with the highest accuracy of 83.70% when the Fold was 7, and the lowest accuracy of 80.57% when the Fold was 3. Then the average accuracy of all Fold tests is 82.13%

Palaeomagnetic results from Early Mesozoic strata in the Qaidam Basin and their implications for the formation of the Northern China Domain

SUMMARY The Northern China Domain is located between the Central Asian Orogenic Belts to the north and the Kunlun–Qinling belt to the south, and it comprises the North China, Alxa and Tarim blocks. The relationships among the Northern China domain and the southern tectonic elements such as the Qaidam Basin/Terrane are debated because of the major modification by crustal deformation in the late Mesozoic–Cenozoic. To address this issue, we conducted a palaeomagnetic and high-precision radiometric dating study of Triassic volcanic rocks and Middle Jurassic strata in the Qaidam Terrane. Our objective was to determine the relationship between the Qaidam Terrane with the Tarim Block and the North China Block (NCB) during the late Palaeozoic and early Mesozoic. Four volcanic samples yielded zircon U-Pb ages of 236–243 Ma. The characteristic remanent magnetizations (Middle Triassic: D = 40.2°, I = 54.6°, α95 = 3.4°; Middle Jurassic: D = 27.4°, I = 48.0°, α95 = 7.9°) passed the fold and reversal tests, and yielded Middle Triassic and Middle Jurassic palaeopole positions at 57.6° N, 178.2° E, A95 = 4.0° and 65.8° N, 197.6° E, A95 = 7.8°, respectively. Based on these new poles, combined with other reliable data, we compared the apparent polar wander path (APWP) of the Qaidam Terrane with those of the NCB and Tarim Block. The results show that, from the Carboniferous through Early Cretaceous, the APWP of the Qaidam Terrane resembles that of the Tarim Block, but it is quite different from that of the NCB. Combined with other reported evidence, we conclude that the Qaidam Terrane was an independent dynamic unit during the late Palaeozoic until its connection with the Tarim Block, which was followed by continuous eastward motion. During this process, the connection between the Qaidam Terrane and the NCB–Alxa blocks occurred in the Middle Triassic, and subsequently the Qaidam Terrane underwent multiple tectonic responses to collisions with the Qiangtang Terrane, Lhasa Terrane and the India Plate, before the formation of its modern tectonic configuration.

Effect of sodium alginate on the physicochemical and sensory properties of vegan surimi

Sodium alginate at different concentrations (0% - Control, 0.25% - F1, 0.50% - F2, and 0.75% - F3) were added to the vegan surimi, and the effect to the physicochemical and sensory properties of vegan surimi was assessed. The addition of 0.75% sodium alginate has significantly (p<0.05) improved the folding test score of F3 from 3.00 to 3.67. A significant (p<0.05) increase was observed in hardness, gumminess, and chewiness of F3 with the recorded value at 3.01, 2.56, and 2.43 kg, respectively. Besides, moisture content (70.82%), water holding capacity (78.36%), and lightness (quality indicator) of F3 were significantly (p<0.05) enhanced with the addition of sodium alginate. In sensory evaluation, the most preferred product was F1 (0.25% sodium alginate) in terms of texture (7.00), taste (7.17), and overall acceptability (7.17) based on the 9-point Hedonic testing. In conclusion, the results suggest the potential of sodium alginate in the improvement of physicochemical and sensory properties of vegan surimi.

Applicability of the Online Short Spatial Ability Battery to university students testing

Introduction. Multiple studies advocate an importance of spatial abilities (SA) for educational and occupational success, especially in STEM. Recently an Online Short Spatial Ability Battery (OSSAB) was developed and normed for SA testing in adolescents. The battery includes mechanical reasoning, paper folding, pattern assembly, and shape rotation tests. The battery has shown good psychometric characteristics (high reliability and validity, low redundancy, discriminative power), and is available in open access and free to use.Aim. The present research aims: 1) to examine the applicability of the OSSAB for university student testing; 2) to describe its psychometric properties and structure; and 3) to investigate links between SA and educational performance.Methods. A total of 772 university students (aged from 18 to 26, mean age (SD) = 19.55 (1.51), 63.1% females) participated in the study. Participants provided information about their age, gender, university major, and academic achievement, and completed a battery of tests that included the OSSAB tests.Results. The study reports psychometric norms for using the OSSAB in university students. Students’ performance in the OSSAB was similar to that shown in previous research in adolescents in terms of means and variance. The OSSAB showed adequate psychometric properties in this sample: no floor or ceiling effects; low redundancy; moderate to high internal consistency; high discriminative power across university majors; and high external validity. The results indicated that around 6% of the students showed very high levels of SA (higher than 1.5 SD above the mean), and around 8% of students showed very low levels of SA (lower than 1.5 SD below mean). In addition, the OSSAB scores were linked to educational profile choice and exam scores, with small-to-medium effect sizes.Scientific novelty. The study provides psychometric norms for a short online open measure of spatial ability in university students.Practical significance. The OSSAB can be used to provide individual recommendations to students (e.g. SA training), to identify spatially gifted students, and for research purposes in university contexts.

50° Post-Eocene clockwise rotation of Mangkang and its implications for the oroclinal bending of the southeastern Tibetan Plateau

The extrusion and clockwise rotation of the southeastern Tibetan Plateau around the Eastern Himalaya Syntaxis has been playing an important role in accommodating the Tibetan Plateau lithosphere shortening. Establishing the extrusion and rotation processes has great significance in understanding the still hotly debated deformation of the Tibetan Plateau. Here we conduct a new paleomagnetic study of the Upper Eocene (∼33.4–36.4 Ma) volcanogenic rocks from Mangkang (29.7°N, 98.6°E), which is located in the eastern Qiangtang Terrane that bent around the Eastern Himalaya Syntaxis. A total of 184 characteristic remnant magnetizations of 20 sites were identified and have a tilt-corrected site-mean direction of Ds = 62.2 ± 5.5°, Is = 47.6 ± 5.7°, K = 46.7, A95 = 4.8°. The statistical properties of the obtained paleomagnetic directions can be straightforwardly explained by paleosecular variation, together with a positive fold test, yielding likely Late Eocene primary magnetizations. Integrated with other available paleomagnetic results and geological evidence in the adjacent areas, we speculate that there existed a ∼ 50° clockwise rotation of the Mangkang area with respect to the Eurasian Plate after the Late Eocene, due to the oroclinal bending around the Eastern Himalaya Syntaxis. The paleolatitudes estimated from paleomagnetic results indicate that the area between Eurasian and eastern Qiangtang has experienced significant latitudinal crustal shortening during the Eocene, which is consistent with geological evidence.

Effect of Adding Egg White Powder on Surimi Quality Based on Pangasius and Catfish Flesh

The variety of raw materials from demersal fish in small quantities has resulted in the development of freshwater fish-based surimi processing technology. This study aims to determine the best concentration of egg white powder based on pangasius and catfish on the quality of surimi by physically, chemically, and sensory. The experimental design used was a Completely Randomized Design (CRD) with the addition of egg white powder at concentrations of 0%, 1%, 2%, 3%, and 4%. The surimi quality characteristics tested in this study included texture profile, degree of whiteness, pH, moisture, ash, protein, fat, water holding capacity, sensory and folding tests. The results showed a significant effect (P < 0.05) on whiteness, fat, water holding capacity, texture profile, folding and sensory tests. However, it did not affect (P > 0.05) on ash, protein, and pH. The results showed that the concentration of 1% egg white powder was able to improve surimi gel based on quality.

Quality of skipjack surimi (Katsuwonus pelamis) with addition of calcium carbonate (CaCO3)

This study aims to determine the effect of the addition of CaCO3 as a whitening agent on the quality properties of the skipjack surimi. The functional properties were evaluated using physical and chemical tests, including white degree analysis, folding test, texture test, water holding capacity, and fat content analysis. Skipjack surimi was carried out in four treatments: 0%, 0.5%, 1%, and 1.5% CaCO3 in a completely randomized design (CRD). The results revealed that adding 1.5% CaCO3 achieved the highest white degree value of 54.22. The folding test values increased with higher CaCO3 concentrations, ranging from 1.57 (control) to 2.05 (1.5% CaCO3). Surimi fat content analysis showed no significant differences (P>0.05) between treatments, varying from 1.16% in the control to 1.51% in the 1.5% CaCO3 treatment. Furthermore, the WHC of skipjack surimi was significantly different (P<0.05) between treatments and increased with the addition of CaCO3: 52.44% (0% CaCO3), 66.42% (0.5% CaCO3), 74.57% (1 % CaCO3), and 79.96 % (1.5% CaCO3). However, sensory color tests showed a significant difference (P<0.05) between the treatments. In conclusion, the incorporation of 1.5% CaCO3 as a whitening agent resulted in an optimal treatment with a folding test value of 2.05 and a WHC value of 79.96%. These findings suggested the potential use of CaCO3 to enhance the functional properties of skipjack surimi during production.

Effect of Flammulina velutipes mushroom and soybean oil as a fat substitute on the quality of chicken sausage

Low-fat meat products are the major trends in developing healthier meat products. Attention is drawn that the animal fat is essential for emulsified meat products to enhance the stability, flavor, cooking yield, and texture. The low energy density and healthier ingredients can replace some or all of the fat in emulsified meat products according to some studies. As can be noted that compound fat substitutes, such as vegetable protein and carrageenan, vegetable oil and vegetable fibre, cellulose, and water, improved texture better than single fat substitutes. Nevertheless, the character of the emulsified meat product will eventually decrease as the amount of animal fat is reduced. Therewith, a little information is available about using Flammulina velutipes and soybean oil as fat alternatives in the manufacture of chicken meat products. The chicken sausage was used as the research object, and Flammulina velutipes and soybean oil were used as fat substitutes to study their effects on the quality of the chicken sausage. Chicken meat, salt and sodium polyphosphate were used for preparation of the sausages. Firstly, the mushroom and soybean oil were mixed in a ratio of 1:1.5, replacing the fats of 25 %, 50 %, 75 % and 100 % respectively. Then, cooking yield, folding test, pH, color, and sensory evaluation were measured. The experimental results showed that when adding Flammulina velutipes and soybean oil, the cooking yield, pH, L* and b* value were increased; folding test values for the 75 % and 100 % experimental groups decreased; chicken sausage with 50% fat replacement had the highest sensory score. In summary, replacing 50% of the fat in chicken sausage with Flammulina velutipes and soybean oil was optimal. The addition of Flammulina velutipes and soybean oil increased the brightness and yellowness of the chicken sausages. The low addition of Flammulina velutipes and soybean oil decreased the redness of the sausage, which increased when Flammulina velutipes and soybean oil completely replaced the fat Flammulina velutipes and soybean oil compound is a promising fat substitute in the development of low-fat meat products.

Ultra-thin composites membrane for deployable structures: XCT driven characterization and FE modeling of folding structure

Light-weight, ultra-thin, high performance, origami-inspired deployable folding structures can be fabricated by simulating various designs and material combinations. In this study, an XCT-driven finite element (FE) model of a building block in a typical full-scale origami structure consisting of stiff and fold regions was developed. Following our previous work, the stiff region of the fold sample was fabricated using a hot compression molding technique whereas hand layup was employed for the fold region. XCT-driven FE based homogenization was carried out on an RVE of real microstructure of both ultra-thin composite laminates. The FE homogenization results were found to be in good agreement with the experimentally-measured effective stiffness properties of both the stiff and fold regions, with a maximum error of ∼10%. Folding tests were conducted on a simple fold and the force vs. displacement and moment vs. curvature curves were plotted. The applicability of XCT-driven FE modeling to simulate foldable structures were demonstrated using post-buckling and bending analysis available in the FE software ABAQUS®. A uniform and symmetric fold curvature, along with the corresponding force vs. displacement response were predicted using XCT-driven FE techniques and found to be in good agreement with data from the experimental tests. The peak force predicted by the FE model showed an error of ∼5.2% compared to the experimental fold test.

Timing the Hegenshan Suture in the Central Asian Orogenic Belt: New Paleomagnetic and Geochronological Constraints From Southeastern Mongolia

AbstractThe timing of formation of the Hegenshan suture is crucial to understanding the evolution of the Central Asian Orogenic Belt (CAOB). Here we present a well‐dated paleomagnetic pole (103 samples from 15 sites, 36.7°N/29.2°E, A95 = 3.3°) that passed a positive fold test, a reversal test, and a conglomerate test from the ∼250 Ma upper Gunbayn Formation andesites in the southeastern Mongolia Block (MOB). The high‐quality paleomagnetic database may demonstrate that the MOB drifted rapidly southward and collided with the Xilinhot–Songliao Block between 256 and 250 Ma, resulting in the closure of the Hegenshan Ocean at ∼250 Ma. The Hegenshan suture and the Solonker suture were formed almost simultaneously and marked the final closure of the Paleo‐Asian Ocean.

Dynamic physical-geological model of complex folding according to paleomagnetic data

The purpose of the study is to evaluate the possibility of using the mathematical apparatus of spatial rotations to solve the determination issues of the nature and age of natural remanent magnetization vectors under complex tectonic dislocations of rocks manifested in the areas of modern folded structures of platform framing. Dynamic physical-geological models are shown to be useful when forming complex tectonic-magmatic systems. Mathematical (computer) modeling in comparison with other methods of studying geological processes features higher accuracy, cost-effectiveness and unambiguity of data interpretation in achieving the set goal. On the basis of dynamic physical-geological model of complex folding, an algorithm is developed and the results of mathematical modeling of natural remanent magnetization vectors are given for solving direct and inverse problems on correct application of the fold test under complex rock deformations. The dynamic physical-geological model of complex folded structure formation shows that the characteristic natural remanent magnetization vectors identified in laboratory experiments on demagnetization can be used to determine their age relative to the folding stages, and, depending on this, fully or partially restore the number, sequence and direction of tectonic dislocations. This will enable us to solve the mineralogenic and geodynamic problems of folded region development more effectively on the basis of paleomagnetic data.

Palaeomagnetism of the mid-Cretaceous red beds from the Tethyan Himalaya: direction discrepancy and tectonic implications

Understanding the northern extension of Greater India is vital for modelling the India–Asia collision process and the formation of the Tibetan Plateau. We present new palaeomagnetic data from the mid-Cretaceous ( c. 106 Ma) Gyabula Formation red beds in the Tethyan Himalaya. Well-defined high laboratory unblocking temperature component magnetizations were isolated from 19 sites and pass the fold tests, indicating that they are pre-folding magnetizations. The tilt-corrected site-mean direction is D s = 222.9°, I s = +39.4° with α 95 = 4.2°. The site-mean inclination increases from 39.4° to 45.8° after anisotropy-based inclination shallowing correction. The declination and inclination differ considerably from those of neighbouring sections. This directional discrepancy of the red beds may be attributed to the fact that the sampled section (sites ZB1–11, 40–52) is overturned and to local vertical-axis rotation. The combination of our new and previously published palaeomagnetic data shows that the Tethyan Himalaya was located at 27.5° ± 2.4°S for the sampled area. Our new results, together with the reliable Cretaceous palaeomagnetic data obtained from the Tethyan Himalaya as well as coeval palaeolatitudes expected from the Indian craton, support a smaller Greater India and that the Tethyan Himalaya did not rift from the Indian craton during the mid-Cretaceous. Supplementary material: Detrital zircon U–Pb ages data, hysteresis parameters data, palaeomagnetic datasets for the Gyabula Formation, anisotropy of isothermal remanent magnetization data, available latest Jurassic–Early Cretaceous palaeomagnetic results from the Tethyan Himalaya and supplementary figures are available at https://doi.org/10.6084/m9.figshare.c.6795683 Thematic collection: This article is part of the Mesozoic and Cenozoic tectonics, landscape and climate change collection available at: https://www.lyellcollection.org/topic/collections/mesozoic-and-cenozoic-tectonics-landscape-and-climate-change

Качество рыбных котлет «пемпек» из змееголова красного (Channa micropeltes) с тыквенным пюре

Pempek is an authentic traditional dish of Indonesian cuisine. As a popular food, it needs to be both tasty and nutritious. Mashed pumpkin can add some health-beneficial properties to the traditional pempek and reduce its carbohydrate content. This research featured pempek made of farmed toman fish (Channa micropeltes), which is an affordable raw material. The research objective was to evaluate the consumer acceptance of the experimental pempek based on its sensory assessment and a folding test. This research also revealed the proximate composition, β-carotene, and amino acids in the pempek samples. &#x0D; The research procedure included the following stages: making pumpkin puree; making pempek by substituting tapioca flour with pumpkin puree (control: 0%, Formulation 1: 10%, Formulation 2: 20%); sensory assessment and folding test; proximate analysis; β-carotene analysis; and amino acid analysis. &#x0D; A greater proportion of pumpkin puree improved the appearance, color, aroma, flavor, and texture values of the experimental sample. Based on the folding test, the elasticity of pempek decreased as the pumpkin share increased. Pumpkin puree improved the quality of pempek in terms of its protein, moisture, ash, carbohydrate, β-carotene, and amino acid composition. Formulation 2 with 20% of tapioca flour substituted with pumpkin puree showed the best results for protein (7.91%) and amino acids (10.27%), as well as the lowest carbohydrate content (26.76%). &#x0D; Mashed pumpkin proved to be an excellent substitute of tapioca flour in the traditional Indonesian pempek fishcake as it improved both its sensory profile and nutritional value.