Cotton Rope Research Articles

Fiber-Based Electret Nanogenerator with a Semisupported Structure for Wearable Electronics

Fiber-based nanogenerators have great potential applications in wearable electronics such as portable nanodevices, e-skin, and artificial intelligence system. Here, we report a kind of fiber-based electret nanogenerator (FENG) with a semisupported core-shell structure. Owing to its unique structure, the open-circuit voltage and short-circuit current of the FENG reach 40 V and 0.6 μA, respectively, under a short working distance (∼25 μm). No obvious degradation of the output performance under a long-time continuous work (>16 h) and different humidity environments (20-95%) is observed, which demonstrates the FENG's good reliability and stability. Many universal materials, such as cotton rope, conductive sewing thread, and polyvinyl chloride tube, have been successfully used to fabricate FENG. Meanwhile, the FENG-based wearable fabric has been successfully developed to effectively harvest mechanical energy of human motion. The FENG is highly effective, reliable, and stable, promoting the development of fiber-based nanogenerators and their applications in self-powered wearable electronics.

Degradability evaluation for natural material fibre used on fish aggregation devices (FADs) in tuna purse seine fishery

Purse seiners deploy large amounts of drifting fish aggregation devices (FADs) in all tropical oceans to catch tunas. These FADs are constructed with porous synthetic fibre netting, which are responsible for incidental mortality of sea turtles and sharks through entanglement, and can engage in ghost fishing if they are lost and abandoned. The use of natural or biodegradable materials to build FADs can effectively mitigate marine pollution and bycatch issues, and as such they are currently promoted by fisheries management organizations. This study evaluated the degradability of ropes made of common natural fibres; cotton rope (3-strand, 96-thread, twisted, S-lay), jute rope (3-strand, 13-thread, twisted, Z-lay) and sisal rope (3-strand, 8-thread, twisted, Z-lay). Degradability was evaluated by measuring the breaking strength (cN/dtex) and retention ratio of rupture elongation. Results showed that jute rope and sisal rope experienced rapid reduction of strength which over the first month soaking in the sea fell by 66.8% and 46.9%, respectively. Cotton rope exhibited the most inert degradation behavior, with breaking strength maintained at half of the initial value at 10 months. The retention ratio of rupture elongation for jute ropes and sisal ropes fluctuated considerably in the following months after deployment, compared to the relatively stable change for cotton rope. Results suggested that among these congeners, cotton rope would be most preferable component for Bio-FADs with a 10-month minimum durability that matches the required lifetime of FAD fishing strategies.

Naturalistic operant responses in deer mice (Peromyscus maniculatus bairdii) and its response to outcome manipulation and serotonergic intervention.

Investigating the motivational triggers underlying naturalistic compulsive-like behavior is generally regarded as challenging. To this extent, the current study aimed to establish a proof-of-concept for future investigation by probing unconditioned and naturalistic operant responses aimed at obtaining nesting material by normal (NNB) and large (LNB) nest building deer mice (Peromyscus maniculatus bairdii). LNB mice and NNB controls were individually placed in cages equipped with a lever-operated nesting material (cotton rope) dispenser and allowed to become accustomed to the response (lever press)-outcome (obtaining cotton rope) contingency over seven nights. Subsequently, the contingency was manipulated by withdrawing the nesting material (experiment 1) or punishing the lever-press response with a mild electrical foot shock (experiment 2). Mice were then treated for 28 days with escitalopram (50 mg/kg/d) and retested. Our results indicate that (1) LNB mice generally made more operant responses compared to NNB controls, (2) withdrawal of nesting material and institution of punishment bolstered responding in LNB but not NNB mice and (3) escitalopram treatment tended to reduce increased responding in LNB mice following experimental manipulation, while normalizing the total number of lever-press counts in the LNB cohort. Therefore, LNB seems to diverge from NNB, not only as a spontaneous phenotype, but also in terms of the motivation to obtain nesting material, despite demotivating feedback. That such differences were abrogated by chronic escitalopram intervention, indicates that the uniquely motivated operant interactions displayed by LNB mice, may be founded upon serotonergic mechanisms, a finding in line with the neurobiological theory of obsessive-compulsive disorder.

Feasibility of pooled oral fluid collection from pre-weaning piglets using cotton ropes

Collection of pooled oral fluid (OF) by allowing pigs to chew on a cotton rope is an alternative to blood sampling. However, little is known about the applicability of this method to suckling piglets. The objectives of the present study were to describe the spontaneous interaction of suckling piglets with a rope and to investigate the influence of a rope pre-exposure on the success rate of sampling. We studied the interaction dynamics of 21 and 28 days-old suckling piglets with a cotton rope presented for 30 min. Ropes were manually wrung out inside plastic bags to release the oral fluid. A total of 49 litters were included. Percentages of success of pooled OF collection for 28-day-old, 21-day-old and 21-day-old pre-exposed litters were 82%, 62% and 100%, respectively. The mean volume collected did not differ between groups. Without pre-exposure, 84.7% and 95% of piglets interacted spontaneously with the rope at 21 and 28 days of age, respectively. The latency between rope presentation and interaction was highly variable between piglets within litters: from < 10 s to 30 min. Among piglets having interacted with the rope, the interaction lasted for at least 60 s for 90% and 91.4% of 21 and 28-day-old piglets, respectively. Pooled OF collection is achievable prior to weaning in piglets of at least 21 days of age. Pooled OF sampling is representative at litter level if collection is successful. In order to improve the success rate of collection, pre-exposing the piglets with a rope one day prior to sampling is effective.

Providing Meaningful Environmental Enrichment and Measuring Saliva Cortisol in Pigs Housed on Slatted Flooring.

As pork is the most consumed meat worldwide, the welfare of animals in the swine industry has increasingly become a major public concern, which imposes a substantial pressure coming from customers, legislators and other stakeholders, to make management changes to improve the well-being of these animals. Several studies have demonstrated that providing environmental enrichment to pigs allows them to express their natural behavior, such as rooting and exploring, as well as nesting prior to farrowing, and is associated with reduced stress and improved production and welfare. However, many considerations should be taken into account when providing environmental enrichment, such as the type of floor, drainage and sewage systems, the pigs' stage in life, the material, as well as its hanging method, height and location within the pen. The objectives of this paper are (1) to give methodologic information on how to provide a relatively simple and practical meaningful environmental enrichment for pigs which are housed on slatted floors during the different stages of their life, and (2) to demonstrate how to collect saliva samples for the measurement of cortisol concentrations, as a biomarker for acute stress. Protocols include information regarding the use of jute, cotton ropes, straw in racks, as well as chewable silicone sticks devices as environmental enrichment in pens of farrowing and lactation, weaners and finishers. In addition, the use of cotton rope for a non-invasive saliva samples collection for cortisol concentrations analysis is detailed. The protocols provided are relevant for professionals aiming to improve and monitor animal welfare, in both research and industrial swine farming.

Diagnosis of Feline Food Sensitivity and Intolerance Using Saliva: 1000 Cases.

Simple SummaryThis study asked whether a novel saliva-based diagnostic test could predict food sensitivities and intolerances in cats. Clinical samples were obtained from 1000 cats proven or suspected to have adverse food reactions (AFR). Most were domestic shorthairs over 10 years old and weighed around 5 kg; they were equally distributed between spayed females and neutered males. Saliva was collected after at least an 8-h fast with a dental cotton rope, placed in a special saliva collection tube, and sent to the laboratory. Salivary reactions to 24 common foods were measured with immunological reagents. Low reacting foods were lamb, cow milk, pork, turkey, wheat (lowest) and white-colored fish, whereas high reacting foods were millet, white potato, rice (highest) and salmon. Thus, this novel salivary-based food sensitivity and intolerance test, described previously for dogs, also provided a reliable and clinically predictive alternative to other methods of measuring AFR in cats.This prospective study assessed the efficacy of a novel saliva-based immunoassay of IgA- and IgM-antibodies in predicting feline food sensitivities and intolerances. Clinical samples were obtained from 1000 cats proven or suspected to have food intolerances. Most were of domestic shorthair breed type, over 10 years of age, and weighed around 5 kg; they were equally distributed between spayed females and neutered males. Saliva was collected after at least an 8-h fast with a dental cotton rope, placed in a double-sleeved saliva collection tube, and sent to the laboratory. Salivary antibodies elicited by 24 common foods were measured with goat anti-canine IgA and IgM. Low reacting foods were lamb, cow milk, pork, turkey, wheat (lowest) and white-colored fish, whereas high reacting foods were millet, white potato, rice (highest) and salmon. Thus, the novel salivary-based food sensitivity and intolerance test, described previously for canines, also provided a reliable and clinically predictive alternative to food elimination trials, serum-based food allergy testing, and skin patch testing in cats. Manufacturers of commercial cat foods and treats, as well as those making homemade diets and treats for cats, should consider avoiding the more highly reactive foods as determined by the present study.

Preference for and behavioural response to environmental enrichment in a small population of sexually mature, commercial boars

AbstractAn increasing public concern over the welfare of livestock species is motivating more producers to consider changes to production practices. Providing environmental enrichment for intensively housed animals is one such potentially welfare-enhancing change. The goal of environmental enrichment is to provide biologically relevant environmental stimuli that allows an animal to perform highly motivated, species-specific behaviours. To date, there is no research specific to the applicability of environmental enrichment for commercial boars(Sus scrofa domesticus),nor on commercial boar welfare in general. In this study, eight individually housed, mature boars were observed to prefer interacting with hanging cotton rope enrichment over hanging rubber chew sticks when given the option. There was a significantly negative correlation between the amount of time boars spent interacting with rope and the amount of time they spent performing stereotypic pen manipulation, suggesting that the rope was more effective at reducing stereotypic behaviour than the rubber. Such reductions in amount of time spent performing abnormal stereotypic behaviours could indicate that some of the animals’ behavioural needs are being met by the enrichment object. Thus, the results of this study could help provide producers with more objective, research-based suggestions concerning the efficacy of practical enrichment choices for individually housed boars.

7th Graders’ understanding of a fire caused by an electrical short circuit

The aims of this study were 1) to develop a fire caused by an electrical short circuit learning activity and 2) to survey 62, 7th graders’ understanding of a fire caused by an electrical short circuit. This cause consists of three parts of understanding, which are 1) an electrical short circuit causes the overload current, 2) this amount of current causes high heat, and 3) this high heat increase the temperature of the surrounding materials until the temperature reach to the Ignition Temperature. The Problem Based Learning (PBL) approach was used to design the learning activity. Students were challenged to design their own group experiment to make a combustion with the provided materials: rubber band, paper clip, AA battery, cotton rope, chewing gum with wrapping aluminium paper, and cotton pad. The open-ended question as “How does the electrical short circuit cause a fire?” was used to survey the students’ understanding of electrical fire causes in the case of short circuit. The result revealed that only one student was able to give all three parts of the explanation, two students could give only second and third part of the explanation. While 2, 4, and 18 students could get only the first, second, and third part of the explanation, respectively. Moreover, some misconceptions of current, similar to the previous research, were found such as 13 students described that current was stored at a part of a conductor to generate heat and 10 students thought that current came from both terminals of a battery and clash at the burning point.

Development of an early warning fire detection system based on a laser spectroscopic carbon monoxide sensor using a 32-bit system-on-chip

A distributed feedback laser-based carbon monoxide (CO) sensor has been developed for early warning detection of fire. The sensor, based on a system-on-chip with high-performance 32-bit microcontroller (MCU), features a digital lock-in amplifier (DLIA) for wavelength modulation spectroscopy (WMS) to improve detection sensitivity. The ramp scanning signal and a sinusoidally modulated signal were generated and superimposed by the MCU, and converted by a digital-to-analog converter to scan the absorption line of CO around 2.327 μm. The n-harmonic components obtained through multiplication of the n-th cosine wave data of the spectral signal, were then processed by integration and filter algorithms. The Allan-Werle deviation was used to evaluate the long-term performance of the sensor. The limit of detection (LoD) for CO was calculated to be 0.0875 ppm based on an optimal integration time of ∼24 s. In field tests, five small-scale standard fires were investigated in accord with EN54 and the results for the test substances – cotton rope (smoldering fire), polyurethane foam (smoldering fire), beech wood, a sheet of A4 paper and polyvinylchloride – verified the reliability and robustness of the developed sensor. Relatively fast response times (110 s for foam and A4 paper; 250 s for PVC, beech wood and cotton rope) were realized based on a threshold of 5 ppm CO. The CO sensor is considered suitable for integration into portable devices for industrial application, particularly for in-situ early warning fire detection.

The efficacy of novel rope flavours as environmental enrichment for stalled gilts

AbstractThe objective of this study was to evaluate the use of flavoured ropes as environmental enrichment for individually housed pigs (Sus scrofa). A 4 × 4 Latin square experimental design was utilised to evaluate the effects of four rope flavour treatments on 24 individually penned gilts: i) water, ii) salt water solution; iii) sugar water solution; and iv) apple juice. Cotton rope was soaked in the assigned treatment solution for 30 min on day 1 of each treatment. The rope was tied to an overhead bar at 1000h on day 1 and removed at 1900h on day 2. The following day, gilts received a different treatment using the same methodology. Gilts were videorecorded one day before treatments were given (baseline) and throughout the study. The video was analysed for enrichment interaction, eating behaviour, and posture using a 2-min scan sample interval between 0700 and 1900h. The addition of sugar flavour increased enrichment interaction compared to apple and salt flavours but did not differ compared to water treatment. Furthermore, gilts interacted with enrichment 61% more the first day the enrichment flavour treatment was provided compared to the second. Gilts given rope enrichment spent less time lying and more time sitting compared to when no enrichment was provided. The results of this study suggest that while the addition of flavours to cotton ropes caused minor changes in enrichment interaction and behaviour, provision of rope enrichment was beneficial for increasing activity in stalled gilts.

Performance Evaluation of Mechanical Power Amplifier for Various Belt Materials

Background: In many applications, it is required to control a large output load using a relatively low control force. To satisfy such purposes, a device like mechanical power amplifier can be used which generally gives a very fast response. As per the requirement of the system, power can be instantaneously available from continuously rotating drums of the mechanical power amplifier. Objective: This paper focuses on the computation of amplification factor of the mechanical power amplifier for different rope materials like leather, woven cotton and steel rope. Method: In this study the experimental analysis is performed. A capstan is a simple mechanical amplifier-rope wound on a motor-driven drum. The drums rotate continuously but communicate torque only when the input shaft is rotated to constricts drum A as shown in Fig. (3). Results: From the experimental analysis, it endorses that when the optimal number of turns tend to two, power amplification factor is to be 2.23 for leather contact, 1.867 for woven cotton contact, 1.32 for steel contact of rope. Conclusion: From the experimental analysis, it is seen that power amplification is higher for leather as compared to woven cotton and steel. The results are remarkably consistent with experimental measurements including favorable calculation of amplification factor.

Experimental research on the infrared gas fire detection system

Open fires and smoldering fires were differentiated using five experiments: wood pyrolysis, polyurethane smoldering, wood fire, polyurethane fire and cotton rope smoldering. At the same time, the distribution of CO2 and CO concentration in combustion products at different heights was studied. Real fire and environmental interference were distinguished using burning cigarettes and sandalwood. The results showed that open fires and smoldering fires produced significantly different ratios of CO2 and CO concentrations. By judging the order of magnitudes of the ratio CO2 and CO concentrations in the combustion products, open fire and smoldering fire could be effectively distinguished. At the same time, the comparison experiment showed that the rate of increase of the concentration of CO in the smoldering fire was higher than that under non-fire conditions. With the criterion of the rate of increase of CO concentration, smoldering fire and non-fire could be distinguished.

Oral fluid as material for non-invasive antibiotics detection in pigs

Intensive and massive pig production often contributes to excessive administration of antibacterials in veterinary medicine. The misuse and failures to follow the label directions of antibiotics, as well as withdrawal inadequacy, can lead to their residue occurrence in products of animal origin. The residue of drugs may result in many biological adverse effects and allergic reactions in consumers as well as the spread of drug-resistant bacteria and bacterial resistance acquisition. Consolidation of pig production requires ensuring adequate conditions of the maintenance of animals with high health conditions, consistent with the guidelines for animal welfare. At the same time, the control of antibiotics in animals is an important element providing the high quality of pigs breeding, as well as the protection of consumers. In residue monitoring programs, the primary material for the control of antibiotics presence in pigs are tissue samples, collected from animals at the slaughterhouse. However, post-mortem analysis does not give the opportunity of monitoring the usage of antibiotics on the farm during the breeding of animals. In ante mortem drug analysis blood can be used as a diagnostic biological matrix; however, blood sampling is connected with certain disadvantages for the animals and the staff responsible for material collection. The post-mortem detection and presence of antibiotic residues in pork tissues above MRL values very often lead to the recall and destruction of significant quantities of meat, which may contribute to economic losses. Therefore, a strong need to find and implement new methods for ante-mortem detection of antibiotics in animals exists, which minimize interference in animal welfare. The results of preliminary studies demonstrate that oral fluid seems to be an effective tool for monitoring the reasonable treatment and residue avoidance. It offers a cost-effective approach for the screening of large populations of animals. The method of oral fluid collection with cotton rope usage allows for the rapid sampling of material. In case of positive oral fluid ante-mortem analysis results, the slaughtering of animals can be delayed, which can bring the avoidance of costs connected with the non-compliant pig meat destruction.

Gilvimarinus japonicus sp. nov., a cellulolytic and agarolytic marine bacterium isolated from coastal debris.

A cellulolytic and agarolytic bacterial strain, designated 12-2T, was isolated from a piece of cotton rope fragment washed ashore on a beach and was studied phenotypically, genotypically and phylogenetically. Analyses of 16S rRNA and gyrB gene sequences and DNA base composition suggested that the strain is a member of the genus Gilvimarinus. However, levels of 16S rRNA and gyrB gene sequence similarity between it and the type strains of Gilvimarinus species were no higher than 97.9 and 78.7 %, respectively, suggesting that the strain is distinct. Moreover, the results of DNA-DNA hybridization experiments and physiological characterization clearly differentiated the strain from its closest neighbours. The strain is therefore considered to represent a novel species of the genus Gilvimarinus, for which the name Gilvimarinus japonicus sp. nov. is proposed. The type strain is 12-2T (=NBRC 111987T=KCTC 52141T).

Polishing of POME by Chlorella sp. in suspended and immobilized system

The effect of using suspended and immobilized growth of Chlorella sp. to treat POME was studied. Cotton and nylon ropes were used as the immobilization material in a rotating microalgae biofilm reactor. The result showed that POME treated in suspended growth system was able to remove 81.9% and 55.5% of the total nitrogen (TN) and total phosphorus (TP) respectively. Whereas the immobilized system showed lower removal of 77.22% and 53.02% for TN and TP. Lower performance of immobilized microalgae is due to the limited light penetration and supply of CO2 inside the immobilization materials. The rotating microalgae biofilm reactor was able to reduce the biochemical oxygen demand (BOD) to 90 mg/L and chemical oxygen demand (COD) to 720 mg/L. Higher BOD and COD reading were obtained in suspended growth due to the presence of small number of microalgae cell in the samples. This study shows that suspended growth system is able to remove higher percentages of nitrogen and phosphorus. However, an efficient separation method such as membrane filtration is required to harvest the cultivated microalgae cell to avoid organic matter release into water bodies.

Biofilm formation in attached microalgal reactors.

The objective of this study was to investigate the fundamental question of biofilm formation. First, a drum biofilm reactor was introduced. The drums were coated with three porous substrates (cotton rope, canvas, and spandex), respectively. The relationships among the substrate, extracellular polymeric substances (EPS), and adhesion ratio were analyzed. Second, a plate biofilm reactor (PBR) was applied by replacing the drum with multiple parallel vertical plates to increase the surface area. The plates were coated with porous substrates on each side, and the nutrients were delivered to the cells by diffusion. The influence of nitrogen source and concentration on compositions of EPS and biofilm formation was analyzed using PBR under sunlight. The results indicated that both substrate and nitrogen were critical on the EPS compositions and biofilm formation. Under the optimal condition (glycine with concentration of 1gl(-1) and substrate of canvas), the maximum biofilm productivity of 54.46gm(-2) d(-1) with adhesion ratio of 84.4% was achieved.

Photoacoustic Compound Fire Alarm System for Detecting Particles and Carbon Monoxide in Smoke

In view of the high sensitivity and high selectivity of photoacoustic technology, a compound fire alarm system used for detecting smoke particles and carbon monoxide was designed on the basis of the photoacoustic spectrometry principle. The system uses an infrared laser with a central wavelength of 1579 nm as the light source, adopts wavelength modulation technology to modulate the continuous light source, and moves the inspection frequency to high frequency with lower noise by integrating harmonic detection technology, thus realizing a measurement of the photoacoustic signal. Concurrently, the system obtains the CO concentration and extinction coefficient of smoke particles via inversion by using the measured scattered light intensity data combined with a certain algorithm. A test was carried out on the system by using three small-scale experiments, namely, cotton rope smoldering fire, polyurethane foam fire and sandalwood smoldering fire. The results show that the CO gas concentrations and extinction coefficient of smoke particles produced by these three experiments are well detected. The CO detection limit of the system was 2.98 ppm. The test results also show that pure powder (used for simulating particles) or pure CO gas will not trigger the system alarm, so unnecessary alarms caused by traditional fire detectors can be avoided and the reliability of the fire alarm can be improved.

A Medico-legal Study of Hanging-A Way of Suicide

Death due to asphyxia is one of the most important causes of violent deaths. Domestic violence plays a great role in suicidal and homicidal violent asphyxia deaths. Various epidemiological and demographical parameters of our study are discussed in the present article. We found, death due to hanging constituted 321 (5.57%) of total deaths, which were subjected to medico-legal autopsy. Young adults of age group 21 to 30 years were accounted for maximum cases followed by 31–40 years group. In victims of hanging, 67% of total cases were of male while only 33% of cases were of female. Indoor places are the commonest places used by victims of hanging. Sari, dupatta and cotton rope are commonly used as a ligature material in hanging cases. Ceiling fan and ceiling hook are the ideal suspension point used by victims of hanging. Only in 0.93% of hanging cases, hyoid bone fracture is present.

OS0205 高分子繊維ロープの機械的特性に及すねじりの影響

This study investigated the mechanical properties of polymeric fiber ropes for harvesting wind energy using an airborne wind rotor at high altitude. The tensile fracture load and rigidity of the ropes are very important for the safety issue and the efficiencies of the power transfer from the wind rotor to the ground. Our results suggested that the tensile fracture load of the ropes decreases as the number of torsion increases, and that there were no significant differences in the power transfer efficiencies of three rope samples used in this experiment, i.e., cotton, cremona, and nylon rope samples. Thus, our finding suggested that nylon can be a proper material in the three rope samples from the safety improvement for harvesting wind energy using an airborne wind rotor.

Application of hemi-hepatic blood flow occlusion through descending hilar plate in laparoscopic anatomic hepatectomy

Objective To explore the application value of hemi-hepatic blood flow occlusion through descending hilar plate in laparoscopic anatomic hepatectomy. Methods The clinical data of 15 patients who underwent laparoscopic anatomic hepatectomy by hemi-hepatic blood flow occlusion using descending hilar plate technique at the First People's hospital of Foshan between August 2012 and May 2014 were retrospectively analyzed. The hilar plate was bluntly dissected to expose the left and right Glissonean pedicles. Either side of Glissonean pedicle was tied up with a turnable aspirator with a cotton rope or shoelace and then bypassed the back of hilar plate. Anatomic hepatectomy was performed when hemi-hepatic blood flow was occluded. The follow-up by telephone interview and outpatient examination was done till October 2014. Results Among the 15 patients, the conversion to open surgery was done in 1 patient, Pringle maneuver in 1 patient, and hemi-hepatic blood flow occlusion by descending the hilar plate in 14 patients. Thirteen patients received succesfully laparoscopic anatomic hepatectomy by hemi-hepatic blood flow occlusion using descending hilar plate technique, including 4 of left hemihepatectomy, 4 of left lateral lobectomy, 2 of right hemihepatectomy, 1 of right posterior lobectomy, 1 of segment Ⅳ hepatectomy and 1 of segment Ⅵ hepatectomy. Bile duct exploration was applied to 4 patients with left hepatic duct stones and T-tube was placed in 2 patients. Nine and 4 patients received left and right hemi-hepatic blood flow occlusion, respectively. The operation time, mean volume of intraoperative blood loss and time of hemi-hepatic blood flow occlusion in 13 patients were (196±63) minutes, 320 mL(range, 50-1 200 mL) and (51±20) minutes, respectively. The time of descending the hilar plate in 14 patients was (10±4) minutes. Among the 13 patients, bile leakage was detected in 1 patient with a maximum volume of drainage of 120 mL/ day, liver wound bleeding in 1 patient with a volume of abdominal bloodstained drainage of 400 mL at postoperative day 2. Two patients were cured by conservative treatment, and no liver failure and perioperative death were occurred. The duration of hospital stay was (6.9 ± 2.4) days. Among the 15 patients, 2 patients were loss to follow-up and other patients were followed up for 5-26 months with good survival, 1 patient died. Conclusion Hemi-hepatic blood flow occlusion through descending hilar plate in laparoscopic anatomic hepatectomy is safe and feasible. Key words: Liver neoplasms; Laparoscopy; Hemi-hepatic blood flow occlusion; Descending hilar plate; Hepatectomy