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Evaluating the value of river ecosystem services can provide a theoretical basis and data support for the ecological protection and development of related watersheds in the survey region. Taking Gansu Province as an example, combined with the characteristics of river ecosystem services in Gansu Province, its river ecosystem service functions are classified into 5 categories at the first level and 15 categories at the second level, and an energy value assessment model is established to assess the value of river ecosystem services in Gansu Province in the years of abundance, flatness, depletion and typical hydrological years. The results show that: the energy value of river ecosystem services in Gansu Province is 902.84×10 21 sej, 846.91×10 21 sej, and 797.35×10 21 sej in abundant, flat, and dry water years respectively, and the annual energy value currency is 197.13×10 10 rmb, 184.91×10 10 rmb and 174.09×10 10 rmb respectively, and the ordering is High flow year > Mean water year > Low flow year. Mean water year > Low flow year, indicating that river flow has a greater impact on the value of river ecosystem services; Fresh water supply, ecological security, ecological regulation service function energy value, and monetary value in each hydrological year accounted for a large proportion, indicating that the ecological service function of rivers in Gansu Province is mainly manifested in the above three aspects, and material production and cultural recreation accounted for a relatively small proportion.

Mathematical Parameters are used in QSAR / QSPR analysis to estimate bioactivity of chemical compounds. Throughout this paper we are discussing the QSPR analysis of certain theocratic graph matrices and their corresponding energy. Our analysis reveals some important findings which help define the useful Mathematical Parameter based on their predictive energy.

In this paper we are discussing the QSPR analysis of certain theocratic graphic matrices and their corresponding energy. Our study reveals some important results that help define the useful mathematical parameter based on their power of predicting. Our analysis shows some significant findings that aid in characterizing the valuable Mathematical Parameter based on their predictive energy.

The large intestine provides a compensatory role in energy recovery when surgical interventions such as extensive small intestinal resections or bypass operations lower the efficiency of nutrient absorption in the upper gastrointestinal (GI) tract. While microorganisms in the colon are known to play vital roles in recovering energy, their contributions remain to be qualified and quantified in the small intestine resection. We develop a mathematical model that links nutrient absorption in the upper and lower GI tract in two steps. First, we describe the effects of small intestine resection on the ileocecal output (ICO), which enters the colon and provides food for microbes. Second, we describe energy recovered by the colon's microorganisms via short-chain fatty acid (SCFA) production. We obtain model parameters by performing a least-squares regression analysis on clinical data for subjects with normal physiology and those who had undergone small intestine resection. For subjects with their intestines intact, our model provided a metabolizable energy value that aligns well with the traditional Atwater coefficients. With removal of the small intestine, physiological absorption became less efficient, and the metabolizable energy decreased. In parallel, the inefficiencies in physiological absorption by the small intestine are partly compensated by production of short-chain fatty acids (SCFA) from proteins and carbohydrates by microorganisms in the colon. The colon recovered more than half of the gross energy intake when the entire small intestine was removed. Meanwhile, the quality of energy absorbed changed, because microbe-derived SCFAs, not the original components of food, become the dominant form of absorbed energy. The mathematical model developed here provides an important framework for describing the effect of clinical interventions on the colon's microorganisms.

Unlocking browse species in semi-arid regions can be a key to improving the livestock productivity. The research was conducted to assess the browse species variation in chemical composition and in vitro dry matter degradability as influenced by seasonal (summer and winter) changes. Leaves from ten randomly selected browsable trees from sixteen species (Vachellia karroo, Senegalia nigrescens, Vachellia nilotica, Balanites maughamii, Berchemia discolor, Berchemia zeyheri, Bridelia mollis, Combretum collinum, Combretum imberbe, Dalbergia melanoxylon, Dichrostachys cinerea, Grewia monticola, Grewia occidentalis, Melia azedarach, Ormocarpum kirkii and Ziziphus mucronata) were harvested before defoliation from the site in two seasons (summer and winter) and dried at room temperature and then ground for analysis. Two-way analysis was used to analyse chemical composition and in vitro ruminal dry matter degradability. Melia azedarach (343.7 g/kg DM) had the highest (p < 0.0001) CP content in summer. In winter, B. maughamii (210.3 g/kg DM) had the highest (p < 0.05) crude protein content. Combretum collinum (2.90 Mcal/kg) had a highest (p < 0.0001) metabolizable energy value in summer. Bridelia mollis, B. maughamii, B. discolor, C. collinum, C. imberbe, O. kirkii, S. nigrescens, V. nilotica, G. occidentalis and B. zeyheri had the same (p > 0.0001) dry matter degradability (DMD) 48 values across two seasons. In both seasons, most of these browse species have the potential to supplement low quality natural grasses because they go beyond the minimum requirement of protein and have coherent amounts of fibre concentration. There is a need to assess the bioactive compounds found in these browse species for the amelioration and also to maximize browsing of these species.

The aim of this study was to determine the effect of crossbreeding on meat production traits of sheep. Purebred (Volgograd breed, n = 30) and crossbred (F3, Volgograd x ¼ North Caucasian breed, n=30) sheep were fed for 60 days from the age of 8 months. The diet was the same for both groups and included: a dry fodder of mixed herbs, green-cut fodder, stock feed of barley, and salt. The initial liveweight for purebred sheep was 42.39±0.38 kg and for crossbred sheep was 44.41±0.47 kg (P < 0.01). The final liveweight for purebred sheep was 50.10±0.43 kg. Crossbred sheep were heavier at 52.40±0.36 kg (P < 0.001). The weight of carcasses was greater for crossbred sheep at 22.87±0.53 kg (P < 0.05) and 20.67±0.76 kg for purebred sheep. Compared with purebred sheep, crossbred sheep had a lower amount of internal fat (0.92±0.27 kg vs. 1.18±0.35 kg). The weight of meat from purebred sheep was less than crossbred sheep (16.12±0.63 kg vs. 18.28±0.43 kg, P < 0.05) while the weight of bone was almost the same (4.55 vs. 4.59 kg). Consequently, the ratio of meat/bone was 5.54 vs. 3.98. The food energy value for the meat of purebred sheep was greater at 259.36±16.78 kcal than the meat of crossbred sheep at 233.85±11.10 kcal. Total moisture in the meat of purebred sheep was lower (60.11±0.67 vs. 63.05±0.65, P < 0.05), total protein was a little higher (17.71±0.77 vs. 17.63±0.24), and lipids were higher (20.73±0.73 vs. 17.89±0.82, P < 0.05) than in the meat of crossbred sheep. The meat of purebred sheep had a lower concentration of non-replaceable amino acid (12.47 g) compared with meat of crossbred sheep (17.20 g), and a lower concentration of replaceable amino acid (23.08 g vs. 26.84 g). The results of this study can be used to improve meat production and meat quality.

Research scientists worldwide are continuously driving innovations toward achieving a safe and healthy environment across the entire ecosystem. An integral component of this pursuit, as captured in SDG-7, is ensuring access to affordable, reliable, sustainable, and modern energy for all. The discovery of the vastness of bioresources embedded in agricultural and forestry residues mirrors hope and presents an array of challenges. Over the decades, biomass densification has been implemented to upgrade and consolidate the energy value of loose biomass for industrial and domestic applications. This is projected to mitigate the overreliance on fossil fuels as energy sources. However, the combustion and energy performance of biomass have not sufficiently met the energy mix requirements for extensive renewable energy use. The performance of the compacted material is dependent on the type of binder used in the manufacturing process, among other factors. This study explored the details of the available binders and biomass compositions investigated in previous studies. The authors also reported their performance, primarily regarding energy value and combustible behavior. Limitations such as low yield and low energy content, among other performance-related issues in biomass briquettes, can be highly enhanced with the appropriate selection of biomass and compatible binders. Hence, various research attempts, approaches, and methodologies have been conducted to develop solid fuel, and the binder’s influence on the energy content, density, combustion behavior, and other physical attributes of fuel briquettes has been reported.

The aims of this experiment were to determine the energy value of raw soybean hulls, in comparison to the energy values of soybean hulls post-extrusion. The roosters were precision-fed up 25 g of either raw or extruded soy hulls, then placed into individual cages with a collection tray underneath to catch excreta. After 48 h, the excreta was collected and analyzed for N, gross energy, dry matter and organic matter. The results of the rooster assay did not differ (P > 0.05) between the raw and extruded soybeans. However, the TMEn (kcal/g) were numerically smaller for the conventional roosters compared to the cecectomized. This indicates that there was very little fermentation of the soybean hulls in the ceca of the roosters. In addition to the rooster assay, a chick growth assay was conducted using Ross 308 male broiler chicks. The study lasted 14 d. Seven-day old chicks (BW: 87.0 ± SEM g). The experimental diets consisted of 7.5% and 15% inclusion of both raw and extruded soybean hulls, respectfully, added at the expense of cellulose. The chicks' BW, feed intake, and G:F ratio were all calculated throughout the study. The results of the chick assay were more striking than that of the rooster assay. Chicks fed the 15% extruded soybean hulls diet had similar performance (P > 0.05) to the positive control; a traditional soybean meal and corn diet. In conclusion, the chick growth assay, used in combination with the precision-fed rooster assay, were able to detect differences between raw and extruded soybean hulls. These data may allow different monogastric animal production systems to include soybean hulls into diet formulation. Whether it be inclusion into weight control diets, low-energy molting diets, or for low-energy, low-cost fiber products.

Current feed evaluation systems often assume that fermented starch (i.e. resistant starch (RS)) yields less energy than digested starch. However, growth rates of pigs fed low and high RS diets are often the same when feed is available ad libitum. This may be explained by its effect on digestive processes changing feeding behavior, and consequently energy utilization. This study aims to investigate the effect of RS on nutrient digestion and digesta passage rate in pigs, in combination with its effect on feeding behavior and growth performance under ad libitum conditions. In experiment 1, 20 male pigs (40 ± 2.82 kg) were fed diets containing either 50% waxy maize starch (low in RS (LRS)) or high-amylose maize starch (high in RS (HRS)), and soluble and insoluble indigestible markers. After 14 days of adaptation to the diets, pigs were fed hourly to reach steady state (6 h), dissected, and digesta were collected from eight segments. From the collected samples, nutrient digestion and passage rate of the solid and liquid digesta fraction were determined. In experiment 2, 288 pigs (80 ± 0.48 kg; sex ratio per pen 1 : 1; boar : gilt) were housed in groups of 6. Pigs were ad libitum-fed one of the experimental diets, and slaughtered at approximately 115 kg. Feed intake, growth and carcass parameters were measured. Ileal starch digestibility was greater for LRS-fed than for HRS-fed pigs (98.0% v. 74.0%; P < 0.001), where the additional undigested starch in HRS-fed pigs was fermented in the large intestine. No effects of RS on digesta passage rate of the solid or liquid digesta fraction and on feeding behavior were observed. Growth rate and feed intake did not differ between diets, whereas feed efficiency of HRS-fed pigs was 1%-unit higher than that of LRS-fed pigs (P = 0.041). The efficiency of feed used for carcass gain did not differ between diets indicating that the difference in feed efficiency was determined by the non-carcass fraction. Despite a 30% greater RS intake (of total starch) with HRS than with LRS, carcass gain and feed efficiency used for carcass gain were unaffected. RS did not affect digesta passage rate nor feeding behavior suggesting that the difference in energy intake between fermented and digested starch is compensated for post-absorptively. Our results indicate that the net energy value of fermented starch currently used in pig feed evaluation systems is underestimated and should be reconsidered.

Olive mill waste is low-quality feed and rarely used in ruminant nutrition because of its high lignocellulose content, the existence of anti-nutritional factors such as total polyphenol and condensed tannin, and low protein contents. This in vitro research was conducted to valorize this waste (crude olive cake, extracted olive cake, and olive leaves) using an exogenous fibrolytic enzyme produced from Trichoderma longibrachiatum in ruminal nutrition. The enzymatic activity of this additive was 1161 units of endoglucanase per millilitre, 113 units of exoglucanase per millilitre, and 2267 units of xylanases per millilitre. This treatment was applied by spraying substrates with four doses: 0 (control), 1 (low), 2 (medium), and 4µL g−1 µL g−1 (high) of dry matter olive mill waste in an air-conditioned room at 26 ∘C for 12 h before in vitro incubation. For the crude olive cake, this additive at high doses increased degradation of 14 % of cellulose and 8 % of hemicellulose compared with the control at 12 h before the in vitro incubation. Consequently, it increased dry matter solubility and reduced sugars at this period compared to the control. Upon ruminal incubation, the high dose of exogenous fibrolytic enzyme increased the gas production from the immediately soluble fraction and insoluble fraction, the rate of gas production for the insoluble fraction, the dry matter degradability by 26 %, the organic matter degradability by 24 %, the metabolizable energy value by 28 %, and the microbial crude protein production by 24 % compared with the control. For olive leaves, an exogenous fibrolytic enzyme at medium dosage can also hydrolyse the hemicellulose compound, release fewer sugars, and increase dry matter solubility compared with the control at 12 h before the in vitro incubation. Upon in vitro incubation, the medium dose increased the gas production from immediately soluble and insoluble fractions, the rate of gas production for the insoluble fraction, the dry matter degradability by 13 %, the organic matter degradability by 11 %, the metabolizable energy value by 12 %, and the microbial crude protein production by 12 % compared with the control. However, the highest dose altered the gas production from insoluble fractions and decreased microbial crude protein production by 6 % compared with the control. Under the same conditions, an exogenous fibrolytic enzyme applied to extracted olive cake did not produce any effect in the chemical composition and nutritional value. These results showed clearly that effectiveness of exogenous fibrolytic enzyme varied with incubated waste. Increasing the nutritional value of crude olive cake and olive leaves using an exogenous fibrolytic enzyme can encourage breeders to use this waste as feed at a low cost in animal nutrition. This valorization of waste is a good solution to reduce pollution of soils and groundwater caused by throwing out this polluted waste into the environment.